1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
25 #ifndef CURL_DISABLE_HTTP
27 #ifdef HAVE_SYS_SOCKET_H
28 #include <sys/socket.h>
30 #ifdef HAVE_NETINET_IN_H
31 #include <netinet/in.h>
40 #ifdef HAVE_ARPA_INET_H
41 #include <arpa/inet.h>
46 #ifdef HAVE_SYS_IOCTL_H
47 #include <sys/ioctl.h>
50 #ifdef HAVE_SYS_PARAM_H
51 #include <sys/param.h>
55 #include <curl/curl.h>
60 #include "curl_base64.h"
64 #include "http_digest.h"
65 #include "curl_ntlm.h"
66 #include "curl_ntlm_wb.h"
67 #include "http_negotiate.h"
72 #include "curl_memory.h"
74 #include "parsedate.h" /* for the week day and month names */
75 #include "strtoofft.h"
78 #include "content_encoding.h"
79 #include "http_proxy.h"
81 #include "non-ascii.h"
83 #define _MPRINTF_REPLACE /* use our functions only */
84 #include <curl/mprintf.h>
86 /* The last #include file should be: */
90 * Forward declarations.
93 static int http_getsock_do(struct connectdata *conn,
96 static int http_should_fail(struct connectdata *conn);
99 static CURLcode https_connecting(struct connectdata *conn, bool *done);
100 static int https_getsock(struct connectdata *conn,
101 curl_socket_t *socks,
104 #define https_connecting(x,y) CURLE_COULDNT_CONNECT
108 * HTTP handler interface.
110 const struct Curl_handler Curl_handler_http = {
112 ZERO_NULL, /* setup_connection */
113 Curl_http, /* do_it */
114 Curl_http_done, /* done */
115 ZERO_NULL, /* do_more */
116 Curl_http_connect, /* connect_it */
117 ZERO_NULL, /* connecting */
118 ZERO_NULL, /* doing */
119 ZERO_NULL, /* proto_getsock */
120 http_getsock_do, /* doing_getsock */
121 ZERO_NULL, /* domore_getsock */
122 ZERO_NULL, /* perform_getsock */
123 ZERO_NULL, /* disconnect */
124 ZERO_NULL, /* readwrite */
125 PORT_HTTP, /* defport */
126 CURLPROTO_HTTP, /* protocol */
127 PROTOPT_NONE /* flags */
132 * HTTPS handler interface.
134 const struct Curl_handler Curl_handler_https = {
135 "HTTPS", /* scheme */
136 ZERO_NULL, /* setup_connection */
137 Curl_http, /* do_it */
138 Curl_http_done, /* done */
139 ZERO_NULL, /* do_more */
140 Curl_http_connect, /* connect_it */
141 https_connecting, /* connecting */
142 ZERO_NULL, /* doing */
143 https_getsock, /* proto_getsock */
144 http_getsock_do, /* doing_getsock */
145 ZERO_NULL, /* domore_getsock */
146 ZERO_NULL, /* perform_getsock */
147 ZERO_NULL, /* disconnect */
148 ZERO_NULL, /* readwrite */
149 PORT_HTTPS, /* defport */
150 CURLPROTO_HTTP | CURLPROTO_HTTPS, /* protocol */
151 PROTOPT_SSL /* flags */
157 * checkheaders() checks the linked list of custom HTTP headers for a
158 * particular header (prefix).
160 * Returns a pointer to the first matching header or NULL if none matched.
162 char *Curl_checkheaders(struct SessionHandle *data, const char *thisheader)
164 struct curl_slist *head;
165 size_t thislen = strlen(thisheader);
167 for(head = data->set.headers; head; head=head->next) {
168 if(Curl_raw_nequal(head->data, thisheader, thislen))
175 * Strip off leading and trailing whitespace from the value in the
176 * given HTTP header line and return a strdupped copy. Returns NULL in
177 * case of allocation failure. Returns an empty string if the header value
178 * consists entirely of whitespace.
180 static char *copy_header_value(const char *h)
189 /* Find the end of the header name */
190 while(*h && (*h != ':'))
194 /* Skip over colon */
197 /* Find the first non-space letter */
199 while(*start && ISSPACE(*start))
202 /* data is in the host encoding so
203 use '\r' and '\n' instead of 0x0d and 0x0a */
204 end = strchr(start, '\r');
206 end = strchr(start, '\n');
208 end = strchr(start, '\0');
212 /* skip all trailing space letters */
213 while((end > start) && ISSPACE(*end))
216 /* get length of the type */
219 value = malloc(len + 1);
223 memcpy(value, start, len);
224 value[len] = 0; /* zero terminate */
230 * http_output_basic() sets up an Authorization: header (or the proxy version)
231 * for HTTP Basic authentication.
235 static CURLcode http_output_basic(struct connectdata *conn, bool proxy)
238 char *authorization = NULL;
239 struct SessionHandle *data = conn->data;
246 userp = &conn->allocptr.proxyuserpwd;
247 user = conn->proxyuser;
248 pwd = conn->proxypasswd;
251 userp = &conn->allocptr.userpwd;
256 snprintf(data->state.buffer, sizeof(data->state.buffer), "%s:%s", user, pwd);
258 error = Curl_base64_encode(data,
259 data->state.buffer, strlen(data->state.buffer),
260 &authorization, &size);
265 return CURLE_REMOTE_ACCESS_DENIED;
267 Curl_safefree(*userp);
268 *userp = aprintf("%sAuthorization: Basic %s\r\n",
273 return CURLE_OUT_OF_MEMORY;
278 /* pickoneauth() selects the most favourable authentication method from the
279 * ones available and the ones we want.
281 * return TRUE if one was picked
283 static bool pickoneauth(struct auth *pick)
286 /* only deal with authentication we want */
287 long avail = pick->avail & pick->want;
290 /* The order of these checks is highly relevant, as this will be the order
291 of preference in case of the existence of multiple accepted types. */
292 if(avail & CURLAUTH_GSSNEGOTIATE)
293 pick->picked = CURLAUTH_GSSNEGOTIATE;
294 else if(avail & CURLAUTH_DIGEST)
295 pick->picked = CURLAUTH_DIGEST;
296 else if(avail & CURLAUTH_NTLM)
297 pick->picked = CURLAUTH_NTLM;
298 else if(avail & CURLAUTH_NTLM_WB)
299 pick->picked = CURLAUTH_NTLM_WB;
300 else if(avail & CURLAUTH_BASIC)
301 pick->picked = CURLAUTH_BASIC;
303 pick->picked = CURLAUTH_PICKNONE; /* we select to use nothing */
306 pick->avail = CURLAUTH_NONE; /* clear it here */
312 * Curl_http_perhapsrewind()
314 * If we are doing POST or PUT {
315 * If we have more data to send {
316 * If we are doing NTLM {
317 * Keep sending since we must not disconnect
320 * If there is more than just a little data left to send, close
321 * the current connection by force.
324 * If we have sent any data {
325 * If we don't have track of all the data {
326 * call app to tell it to rewind
329 * rewind internally so that the operation can restart fine
334 static CURLcode http_perhapsrewind(struct connectdata *conn)
336 struct SessionHandle *data = conn->data;
337 struct HTTP *http = data->state.proto.http;
338 curl_off_t bytessent;
339 curl_off_t expectsend = -1; /* default is unknown */
342 /* If this is still NULL, we have not reach very far and we can safely
343 skip this rewinding stuff */
346 switch(data->set.httpreq) {
354 bytessent = http->writebytecount;
356 if(conn->bits.authneg)
357 /* This is a state where we are known to be negotiating and we don't send
361 /* figure out how much data we are expected to send */
362 switch(data->set.httpreq) {
364 if(data->set.postfieldsize != -1)
365 expectsend = data->set.postfieldsize;
366 else if(data->set.postfields)
367 expectsend = (curl_off_t)strlen(data->set.postfields);
370 if(data->set.infilesize != -1)
371 expectsend = data->set.infilesize;
373 case HTTPREQ_POST_FORM:
374 expectsend = http->postsize;
381 conn->bits.rewindaftersend = FALSE; /* default */
383 if((expectsend == -1) || (expectsend > bytessent)) {
384 /* There is still data left to send */
385 if((data->state.authproxy.picked == CURLAUTH_NTLM) ||
386 (data->state.authhost.picked == CURLAUTH_NTLM) ||
387 (data->state.authproxy.picked == CURLAUTH_NTLM_WB) ||
388 (data->state.authhost.picked == CURLAUTH_NTLM_WB)) {
389 if(((expectsend - bytessent) < 2000) ||
390 (conn->ntlm.state != NTLMSTATE_NONE)) {
391 /* The NTLM-negotiation has started *OR* there is just a little (<2K)
392 data left to send, keep on sending. */
394 /* rewind data when completely done sending! */
395 if(!conn->bits.authneg) {
396 conn->bits.rewindaftersend = TRUE;
397 infof(data, "Rewind stream after send\n");
403 /* this is already marked to get closed */
406 infof(data, "NTLM send, close instead of sending %" FORMAT_OFF_T
407 " bytes\n", (curl_off_t)(expectsend - bytessent));
410 /* This is not NTLM or NTLM with many bytes left to send: close
412 conn->bits.close = TRUE;
413 data->req.size = 0; /* don't download any more than 0 bytes */
415 /* There still is data left to send, but this connection is marked for
416 closure so we can safely do the rewind right now */
420 /* we rewind now at once since if we already sent something */
421 return Curl_readrewind(conn);
427 * Curl_http_auth_act() gets called when all HTTP headers have been received
428 * and it checks what authentication methods that are available and decides
429 * which one (if any) to use. It will set 'newurl' if an auth method was
433 CURLcode Curl_http_auth_act(struct connectdata *conn)
435 struct SessionHandle *data = conn->data;
436 bool pickhost = FALSE;
437 bool pickproxy = FALSE;
438 CURLcode code = CURLE_OK;
440 if(100 <= data->req.httpcode && 199 >= data->req.httpcode)
441 /* this is a transient response code, ignore */
444 if(data->state.authproblem)
445 return data->set.http_fail_on_error?CURLE_HTTP_RETURNED_ERROR:CURLE_OK;
447 if(conn->bits.user_passwd &&
448 ((data->req.httpcode == 401) ||
449 (conn->bits.authneg && data->req.httpcode < 300))) {
450 pickhost = pickoneauth(&data->state.authhost);
452 data->state.authproblem = TRUE;
454 if(conn->bits.proxy_user_passwd &&
455 ((data->req.httpcode == 407) ||
456 (conn->bits.authneg && data->req.httpcode < 300))) {
457 pickproxy = pickoneauth(&data->state.authproxy);
459 data->state.authproblem = TRUE;
462 if(pickhost || pickproxy) {
463 /* In case this is GSS auth, the newurl field is already allocated so
464 we must make sure to free it before allocating a new one. As figured
465 out in bug #2284386 */
466 Curl_safefree(data->req.newurl);
467 data->req.newurl = strdup(data->change.url); /* clone URL */
468 if(!data->req.newurl)
469 return CURLE_OUT_OF_MEMORY;
471 if((data->set.httpreq != HTTPREQ_GET) &&
472 (data->set.httpreq != HTTPREQ_HEAD) &&
473 !conn->bits.rewindaftersend) {
474 code = http_perhapsrewind(conn);
480 else if((data->req.httpcode < 300) &&
481 (!data->state.authhost.done) &&
482 conn->bits.authneg) {
483 /* no (known) authentication available,
484 authentication is not "done" yet and
485 no authentication seems to be required and
486 we didn't try HEAD or GET */
487 if((data->set.httpreq != HTTPREQ_GET) &&
488 (data->set.httpreq != HTTPREQ_HEAD)) {
489 data->req.newurl = strdup(data->change.url); /* clone URL */
490 if(!data->req.newurl)
491 return CURLE_OUT_OF_MEMORY;
492 data->state.authhost.done = TRUE;
495 if(http_should_fail(conn)) {
496 failf (data, "The requested URL returned error: %d",
498 code = CURLE_HTTP_RETURNED_ERROR;
506 * Output the correct authentication header depending on the auth type
507 * and whether or not it is to a proxy.
510 output_auth_headers(struct connectdata *conn,
511 struct auth *authstatus,
516 struct SessionHandle *data = conn->data;
517 const char *auth=NULL;
518 CURLcode result = CURLE_OK;
519 #ifdef USE_HTTP_NEGOTIATE
520 struct negotiatedata *negdata = proxy?
521 &data->state.proxyneg:&data->state.negotiate;
524 #ifdef CURL_DISABLE_CRYPTO_AUTH
529 #ifdef USE_HTTP_NEGOTIATE
530 negdata->state = GSS_AUTHNONE;
531 if((authstatus->picked == CURLAUTH_GSSNEGOTIATE) &&
532 negdata->context && !GSS_ERROR(negdata->status)) {
533 auth="GSS-Negotiate";
534 result = Curl_output_negotiate(conn, proxy);
537 authstatus->done = TRUE;
538 negdata->state = GSS_AUTHSENT;
543 if(authstatus->picked == CURLAUTH_NTLM) {
545 result = Curl_output_ntlm(conn, proxy);
551 #if defined(USE_NTLM) && defined(NTLM_WB_ENABLED)
552 if(authstatus->picked == CURLAUTH_NTLM_WB) {
554 result = Curl_output_ntlm_wb(conn, proxy);
560 #ifndef CURL_DISABLE_CRYPTO_AUTH
561 if(authstatus->picked == CURLAUTH_DIGEST) {
563 result = Curl_output_digest(conn,
565 (const unsigned char *)request,
566 (const unsigned char *)path);
572 if(authstatus->picked == CURLAUTH_BASIC) {
574 if((proxy && conn->bits.proxy_user_passwd &&
575 !Curl_checkheaders(data, "Proxy-authorization:")) ||
576 (!proxy && conn->bits.user_passwd &&
577 !Curl_checkheaders(data, "Authorization:"))) {
579 result = http_output_basic(conn, proxy);
583 /* NOTE: this function should set 'done' TRUE, as the other auth
584 functions work that way */
585 authstatus->done = TRUE;
589 infof(data, "%s auth using %s with user '%s'\n",
590 proxy?"Proxy":"Server", auth,
591 proxy?(conn->proxyuser?conn->proxyuser:""):
592 (conn->user?conn->user:""));
593 authstatus->multi = (!authstatus->done) ? TRUE : FALSE;
596 authstatus->multi = FALSE;
602 * Curl_http_output_auth() setups the authentication headers for the
603 * host/proxy and the correct authentication
604 * method. conn->data->state.authdone is set to TRUE when authentication is
607 * @param conn all information about the current connection
608 * @param request pointer to the request keyword
609 * @param path pointer to the requested path
610 * @param proxytunnel boolean if this is the request setting up a "proxy
616 Curl_http_output_auth(struct connectdata *conn,
619 bool proxytunnel) /* TRUE if this is the request setting
620 up the proxy tunnel */
622 CURLcode result = CURLE_OK;
623 struct SessionHandle *data = conn->data;
624 struct auth *authhost;
625 struct auth *authproxy;
629 authhost = &data->state.authhost;
630 authproxy = &data->state.authproxy;
632 if((conn->bits.httpproxy && conn->bits.proxy_user_passwd) ||
633 conn->bits.user_passwd)
634 /* continue please */ ;
636 authhost->done = TRUE;
637 authproxy->done = TRUE;
638 return CURLE_OK; /* no authentication with no user or password */
641 if(authhost->want && !authhost->picked)
642 /* The app has selected one or more methods, but none has been picked
643 so far by a server round-trip. Then we set the picked one to the
644 want one, and if this is one single bit it'll be used instantly. */
645 authhost->picked = authhost->want;
647 if(authproxy->want && !authproxy->picked)
648 /* The app has selected one or more methods, but none has been picked so
649 far by a proxy round-trip. Then we set the picked one to the want one,
650 and if this is one single bit it'll be used instantly. */
651 authproxy->picked = authproxy->want;
653 #ifndef CURL_DISABLE_PROXY
654 /* Send proxy authentication header if needed */
655 if(conn->bits.httpproxy &&
656 (conn->bits.tunnel_proxy == proxytunnel)) {
657 result = output_auth_headers(conn, authproxy, request, path, TRUE);
664 #endif /* CURL_DISABLE_PROXY */
665 /* we have no proxy so let's pretend we're done authenticating
667 authproxy->done = TRUE;
669 /* To prevent the user+password to get sent to other than the original
670 host due to a location-follow, we do some weirdo checks here */
671 if(!data->state.this_is_a_follow ||
673 !data->state.first_host ||
674 data->set.http_disable_hostname_check_before_authentication ||
675 Curl_raw_equal(data->state.first_host, conn->host.name)) {
676 result = output_auth_headers(conn, authhost, request, path, FALSE);
679 authhost->done = TRUE;
686 * Curl_http_input_auth() deals with Proxy-Authenticate: and WWW-Authenticate:
687 * headers. They are dealt with both in the transfer.c main loop and in the
688 * proxy CONNECT loop.
691 CURLcode Curl_http_input_auth(struct connectdata *conn,
693 const char *header) /* the first non-space */
696 * This resource requires authentication
698 struct SessionHandle *data = conn->data;
704 if(httpcode == 407) {
705 start = header+strlen("Proxy-authenticate:");
706 availp = &data->info.proxyauthavail;
707 authp = &data->state.authproxy;
710 start = header+strlen("WWW-Authenticate:");
711 availp = &data->info.httpauthavail;
712 authp = &data->state.authhost;
715 /* pass all white spaces */
716 while(*start && ISSPACE(*start))
720 * Here we check if we want the specific single authentication (using ==) and
721 * if we do, we initiate usage of it.
723 * If the provided authentication is wanted as one out of several accepted
724 * types (using &), we OR this authentication type to the authavail
729 * ->picked is first set to the 'want' value (one or more bits) before the
730 * request is sent, and then it is again set _after_ all response 401/407
731 * headers have been received but then only to a single preferred method
737 #ifdef USE_HTTP_NEGOTIATE
738 if(checkprefix("GSS-Negotiate", start) ||
739 checkprefix("Negotiate", start)) {
741 *availp |= CURLAUTH_GSSNEGOTIATE;
742 authp->avail |= CURLAUTH_GSSNEGOTIATE;
744 if(data->state.negotiate.state == GSS_AUTHSENT) {
745 /* if we sent GSS authentication in the outgoing request and we get
746 this back, we're in trouble */
747 infof(data, "Authentication problem. Ignoring this.\n");
748 data->state.authproblem = TRUE;
751 neg = Curl_input_negotiate(conn, (httpcode == 407)?TRUE:FALSE, start);
753 DEBUGASSERT(!data->req.newurl);
754 data->req.newurl = strdup(data->change.url);
755 if(!data->req.newurl)
756 return CURLE_OUT_OF_MEMORY;
757 data->state.authproblem = FALSE;
758 /* we received GSS auth info and we dealt with it fine */
759 data->state.negotiate.state = GSS_AUTHRECV;
762 data->state.authproblem = TRUE;
769 /* NTLM support requires the SSL crypto libs */
770 if(checkprefix("NTLM", start)) {
771 *availp |= CURLAUTH_NTLM;
772 authp->avail |= CURLAUTH_NTLM;
773 if(authp->picked == CURLAUTH_NTLM ||
774 authp->picked == CURLAUTH_NTLM_WB) {
775 /* NTLM authentication is picked and activated */
777 Curl_input_ntlm(conn, (httpcode == 407)?TRUE:FALSE, start);
778 if(CURLE_OK == ntlm) {
779 data->state.authproblem = FALSE;
780 #ifdef NTLM_WB_ENABLED
781 if(authp->picked == CURLAUTH_NTLM_WB) {
782 *availp &= ~CURLAUTH_NTLM;
783 authp->avail &= ~CURLAUTH_NTLM;
784 *availp |= CURLAUTH_NTLM_WB;
785 authp->avail |= CURLAUTH_NTLM_WB;
787 /* Get the challenge-message which will be passed to
788 * ntlm_auth for generating the type 3 message later */
789 while(*start && ISSPACE(*start))
791 if(checkprefix("NTLM", start)) {
792 start += strlen("NTLM");
793 while(*start && ISSPACE(*start))
796 if((conn->challenge_header = strdup(start)) == NULL)
797 return CURLE_OUT_OF_MEMORY;
803 infof(data, "Authentication problem. Ignoring this.\n");
804 data->state.authproblem = TRUE;
810 #ifndef CURL_DISABLE_CRYPTO_AUTH
811 if(checkprefix("Digest", start)) {
812 if((authp->avail & CURLAUTH_DIGEST) != 0) {
813 infof(data, "Ignoring duplicate digest auth header.\n");
817 *availp |= CURLAUTH_DIGEST;
818 authp->avail |= CURLAUTH_DIGEST;
820 /* We call this function on input Digest headers even if Digest
821 * authentication isn't activated yet, as we need to store the
822 * incoming data from this header in case we are gonna use
824 dig = Curl_input_digest(conn, (httpcode == 407)?TRUE:FALSE, start);
826 if(CURLDIGEST_FINE != dig) {
827 infof(data, "Authentication problem. Ignoring this.\n");
828 data->state.authproblem = TRUE;
834 if(checkprefix("Basic", start)) {
835 *availp |= CURLAUTH_BASIC;
836 authp->avail |= CURLAUTH_BASIC;
837 if(authp->picked == CURLAUTH_BASIC) {
838 /* We asked for Basic authentication but got a 40X back
839 anyway, which basically means our name+password isn't
841 authp->avail = CURLAUTH_NONE;
842 infof(data, "Authentication problem. Ignoring this.\n");
843 data->state.authproblem = TRUE;
847 /* there may be multiple methods on one line, so keep reading */
848 while(*start && *start != ',') /* read up to the next comma */
850 if(*start == ',') /* if we're on a comma, skip it */
852 while(*start && ISSPACE(*start))
859 * http_should_fail() determines whether an HTTP response has gotten us
860 * into an error state or not.
862 * @param conn all information about the current connection
864 * @retval 0 communications should continue
866 * @retval 1 communications should not continue
868 static int http_should_fail(struct connectdata *conn)
870 struct SessionHandle *data;
877 httpcode = data->req.httpcode;
880 ** If we haven't been asked to fail on error,
883 if(!data->set.http_fail_on_error)
887 ** Any code < 400 is never terminal.
892 if(data->state.resume_from &&
893 (data->set.httpreq==HTTPREQ_GET) &&
895 /* "Requested Range Not Satisfiable", just proceed and
896 pretend this is no error */
901 ** Any code >= 400 that's not 401 or 407 is always
904 if((httpcode != 401) &&
909 ** All we have left to deal with is 401 and 407
911 DEBUGASSERT((httpcode == 401) || (httpcode == 407));
914 ** Examine the current authentication state to see if this
915 ** is an error. The idea is for this function to get
916 ** called after processing all the headers in a response
917 ** message. So, if we've been to asked to authenticate a
918 ** particular stage, and we've done it, we're OK. But, if
919 ** we're already completely authenticated, it's not OK to
920 ** get another 401 or 407.
922 ** It is possible for authentication to go stale such that
923 ** the client needs to reauthenticate. Once that info is
924 ** available, use it here.
928 ** Either we're not authenticating, or we're supposed to
929 ** be authenticating something else. This is an error.
931 if((httpcode == 401) && !conn->bits.user_passwd)
933 if((httpcode == 407) && !conn->bits.proxy_user_passwd)
936 return data->state.authproblem;
940 * readmoredata() is a "fread() emulation" to provide POST and/or request
941 * data. It is used when a huge POST is to be made and the entire chunk wasn't
942 * sent in the first send(). This function will then be called from the
943 * transfer.c loop when more data is to be sent to the peer.
945 * Returns the amount of bytes it filled the buffer with.
947 static size_t readmoredata(char *buffer,
952 struct connectdata *conn = (struct connectdata *)userp;
953 struct HTTP *http = conn->data->state.proto.http;
954 size_t fullsize = size * nitems;
956 if(0 == http->postsize)
957 /* nothing to return */
960 /* make sure that a HTTP request is never sent away chunked! */
961 conn->data->req.forbidchunk = (http->sending == HTTPSEND_REQUEST)?TRUE:FALSE;
963 if(http->postsize <= (curl_off_t)fullsize) {
964 memcpy(buffer, http->postdata, (size_t)http->postsize);
965 fullsize = (size_t)http->postsize;
967 if(http->backup.postsize) {
968 /* move backup data into focus and continue on that */
969 http->postdata = http->backup.postdata;
970 http->postsize = http->backup.postsize;
971 conn->fread_func = http->backup.fread_func;
972 conn->fread_in = http->backup.fread_in;
974 http->sending++; /* move one step up */
976 http->backup.postsize=0;
984 memcpy(buffer, http->postdata, fullsize);
985 http->postdata += fullsize;
986 http->postsize -= fullsize;
991 /* ------------------------------------------------------------------------- */
992 /* add_buffer functions */
995 * Curl_add_buffer_init() sets up and returns a fine buffer struct
997 Curl_send_buffer *Curl_add_buffer_init(void)
999 return calloc(1, sizeof(Curl_send_buffer));
1003 * Curl_add_buffer_send() sends a header buffer and frees all associated
1004 * memory. Body data may be appended to the header data if desired.
1008 CURLcode Curl_add_buffer_send(Curl_send_buffer *in,
1009 struct connectdata *conn,
1011 /* add the number of sent bytes to this
1013 long *bytes_written,
1015 /* how much of the buffer contains body data */
1016 size_t included_body_bytes,
1024 struct HTTP *http = conn->data->state.proto.http;
1026 curl_socket_t sockfd;
1029 DEBUGASSERT(socketindex <= SECONDARYSOCKET);
1031 sockfd = conn->sock[socketindex];
1033 /* The looping below is required since we use non-blocking sockets, but due
1034 to the circumstances we will just loop and try again and again etc */
1037 size = in->size_used;
1039 headersize = size - included_body_bytes; /* the initial part that isn't body
1042 DEBUGASSERT(size > included_body_bytes);
1044 res = Curl_convert_to_network(conn->data, ptr, headersize);
1045 /* Curl_convert_to_network calls failf if unsuccessful */
1047 /* conversion failed, free memory and return to the caller */
1054 if(conn->handler->flags & PROTOPT_SSL) {
1055 /* We never send more than CURL_MAX_WRITE_SIZE bytes in one single chunk
1056 when we speak HTTPS, as if only a fraction of it is sent now, this data
1057 needs to fit into the normal read-callback buffer later on and that
1058 buffer is using this size.
1061 sendsize= (size > CURL_MAX_WRITE_SIZE)?CURL_MAX_WRITE_SIZE:size;
1063 /* OpenSSL is very picky and we must send the SAME buffer pointer to the
1064 library when we attempt to re-send this buffer. Sending the same data
1065 is not enough, we must use the exact same address. For this reason, we
1066 must copy the data to the uploadbuffer first, since that is the buffer
1067 we will be using if this send is retried later.
1069 memcpy(conn->data->state.uploadbuffer, ptr, sendsize);
1070 ptr = conn->data->state.uploadbuffer;
1075 res = Curl_write(conn, sockfd, ptr, sendsize, &amount);
1077 if(CURLE_OK == res) {
1079 * Note that we may not send the entire chunk at once, and we have a set
1080 * number of data bytes at the end of the big buffer (out of which we may
1081 * only send away a part).
1083 /* how much of the header that was sent */
1084 size_t headlen = (size_t)amount>headersize?headersize:(size_t)amount;
1085 size_t bodylen = amount - headlen;
1087 if(conn->data->set.verbose) {
1088 /* this data _may_ contain binary stuff */
1089 Curl_debug(conn->data, CURLINFO_HEADER_OUT, ptr, headlen, conn);
1090 if((size_t)amount > headlen) {
1091 /* there was body data sent beyond the initial header part, pass that
1092 on to the debug callback too */
1093 Curl_debug(conn->data, CURLINFO_DATA_OUT,
1094 ptr+headlen, bodylen, conn);
1098 /* since we sent a piece of the body here, up the byte counter for it
1100 http->writebytecount += bodylen;
1102 /* 'amount' can never be a very large value here so typecasting it so a
1103 signed 31 bit value should not cause problems even if ssize_t is
1105 *bytes_written += (long)amount;
1108 if((size_t)amount != size) {
1109 /* The whole request could not be sent in one system call. We must
1110 queue it up and send it later when we get the chance. We must not
1111 loop here and wait until it might work again. */
1115 ptr = in->buffer + amount;
1117 /* backup the currently set pointers */
1118 http->backup.fread_func = conn->fread_func;
1119 http->backup.fread_in = conn->fread_in;
1120 http->backup.postdata = http->postdata;
1121 http->backup.postsize = http->postsize;
1123 /* set the new pointers for the request-sending */
1124 conn->fread_func = (curl_read_callback)readmoredata;
1125 conn->fread_in = (void *)conn;
1126 http->postdata = ptr;
1127 http->postsize = (curl_off_t)size;
1129 http->send_buffer = in;
1130 http->sending = HTTPSEND_REQUEST;
1134 http->sending = HTTPSEND_BODY;
1135 /* the full buffer was sent, clean up and return */
1138 if((size_t)amount != size)
1139 /* We have no continue-send mechanism now, fail. This can only happen
1140 when this function is used from the CONNECT sending function. We
1141 currently (stupidly) assume that the whole request is always sent
1142 away in the first single chunk.
1146 return CURLE_SEND_ERROR;
1148 conn->writechannel_inuse = FALSE;
1160 * add_bufferf() add the formatted input to the buffer.
1162 CURLcode Curl_add_bufferf(Curl_send_buffer *in, const char *fmt, ...)
1167 s = vaprintf(fmt, ap); /* this allocs a new string to append */
1171 CURLcode result = Curl_add_buffer(in, s, strlen(s));
1175 /* If we failed, we cleanup the whole buffer and return error */
1179 return CURLE_OUT_OF_MEMORY;
1183 * add_buffer() appends a memory chunk to the existing buffer
1185 CURLcode Curl_add_buffer(Curl_send_buffer *in, const void *inptr, size_t size)
1190 if(~size < in->size_used) {
1191 /* If resulting used size of send buffer would wrap size_t, cleanup
1192 the whole buffer and return error. Otherwise the required buffer
1193 size will fit into a single allocatable memory chunk */
1194 Curl_safefree(in->buffer);
1196 return CURLE_OUT_OF_MEMORY;
1200 ((in->size_used + size) > (in->size_max - 1))) {
1202 /* If current buffer size isn't enough to hold the result, use a
1203 buffer size that doubles the required size. If this new size
1204 would wrap size_t, then just use the largest possible one */
1206 if((size > (size_t)-1/2) || (in->size_used > (size_t)-1/2) ||
1207 (~(size*2) < (in->size_used*2)))
1208 new_size = (size_t)-1;
1210 new_size = (in->size_used+size)*2;
1213 /* we have a buffer, enlarge the existing one */
1214 new_rb = realloc(in->buffer, new_size);
1216 /* create a new buffer */
1217 new_rb = malloc(new_size);
1220 /* If we failed, we cleanup the whole buffer and return error */
1221 Curl_safefree(in->buffer);
1223 return CURLE_OUT_OF_MEMORY;
1226 in->buffer = new_rb;
1227 in->size_max = new_size;
1229 memcpy(&in->buffer[in->size_used], inptr, size);
1231 in->size_used += size;
1236 /* end of the add_buffer functions */
1237 /* ------------------------------------------------------------------------- */
1242 * Curl_compareheader()
1244 * Returns TRUE if 'headerline' contains the 'header' with given 'content'.
1245 * Pass headers WITH the colon.
1248 Curl_compareheader(const char *headerline, /* line to check */
1249 const char *header, /* header keyword _with_ colon */
1250 const char *content) /* content string to find */
1252 /* RFC2616, section 4.2 says: "Each header field consists of a name followed
1253 * by a colon (":") and the field value. Field names are case-insensitive.
1254 * The field value MAY be preceded by any amount of LWS, though a single SP
1257 size_t hlen = strlen(header);
1263 if(!Curl_raw_nequal(headerline, header, hlen))
1264 return FALSE; /* doesn't start with header */
1266 /* pass the header */
1267 start = &headerline[hlen];
1269 /* pass all white spaces */
1270 while(*start && ISSPACE(*start))
1273 /* find the end of the header line */
1274 end = strchr(start, '\r'); /* lines end with CRLF */
1276 /* in case there's a non-standard compliant line here */
1277 end = strchr(start, '\n');
1280 /* hm, there's no line ending here, use the zero byte! */
1281 end = strchr(start, '\0');
1284 len = end-start; /* length of the content part of the input line */
1285 clen = strlen(content); /* length of the word to find */
1287 /* find the content string in the rest of the line */
1288 for(;len>=clen;len--, start++) {
1289 if(Curl_raw_nequal(start, content, clen))
1290 return TRUE; /* match! */
1293 return FALSE; /* no match */
1297 * Curl_http_connect() performs HTTP stuff to do at connect-time, called from
1298 * the generic Curl_connect().
1300 CURLcode Curl_http_connect(struct connectdata *conn, bool *done)
1302 struct SessionHandle *data;
1307 /* We default to persistent connections. We set this already in this connect
1308 function to make the re-use checks properly be able to check this bit. */
1309 conn->bits.close = FALSE;
1311 #ifndef CURL_DISABLE_PROXY
1312 /* If we are not using a proxy and we want a secure connection, perform SSL
1313 * initialization & connection now. If using a proxy with https, then we
1314 * must tell the proxy to CONNECT to the host we want to talk to. Only
1315 * after the connect has occurred, can we start talking SSL
1317 if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
1319 /* either SSL over proxy, or explicitly asked for */
1320 result = Curl_proxyCONNECT(conn, FIRSTSOCKET,
1323 if(CURLE_OK != result)
1327 if(conn->bits.tunnel_connecting) {
1328 /* nothing else to do except wait right now - we're not done here. */
1331 #endif /* CURL_DISABLE_PROXY */
1333 if(conn->given->flags & PROTOPT_SSL) {
1334 /* perform SSL initialization */
1335 if(data->state.used_interface == Curl_if_multi) {
1336 result = https_connecting(conn, done);
1342 result = Curl_ssl_connect(conn, FIRSTSOCKET);
1355 /* this returns the socket to wait for in the DO and DOING state for the multi
1356 interface and then we're always _sending_ a request and thus we wait for
1357 the single socket to become writable only */
1358 static int http_getsock_do(struct connectdata *conn,
1359 curl_socket_t *socks,
1363 (void)numsocks; /* unused, we trust it to be at least 1 */
1364 socks[0] = conn->sock[FIRSTSOCKET];
1365 return GETSOCK_WRITESOCK(0);
1369 static CURLcode https_connecting(struct connectdata *conn, bool *done)
1372 DEBUGASSERT((conn) && (conn->handler->flags & PROTOPT_SSL));
1374 /* perform SSL initialization for this socket */
1375 result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, done);
1377 conn->bits.close = TRUE; /* a failed connection is marked for closure
1378 to prevent (bad) re-use or similar */
1383 #if defined(USE_SSLEAY) || defined(USE_GNUTLS)
1384 /* This function is for OpenSSL and GnuTLS only. It should be made to query
1385 the generic SSL layer instead. */
1386 static int https_getsock(struct connectdata *conn,
1387 curl_socket_t *socks,
1390 if(conn->handler->flags & PROTOPT_SSL) {
1391 struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET];
1394 return GETSOCK_BLANK;
1396 if(connssl->connecting_state == ssl_connect_2_writing) {
1398 socks[0] = conn->sock[FIRSTSOCKET];
1399 return GETSOCK_WRITESOCK(0);
1401 else if(connssl->connecting_state == ssl_connect_2_reading) {
1403 socks[0] = conn->sock[FIRSTSOCKET];
1404 return GETSOCK_READSOCK(0);
1410 #if defined(USE_NSS) || defined(USE_QSOSSL) || \
1411 defined(USE_POLARSSL) || defined(USE_AXTLS) || defined(USE_CYASSL)
1412 static int https_getsock(struct connectdata *conn,
1413 curl_socket_t *socks,
1419 return GETSOCK_BLANK;
1421 #endif /* USE_AXTLS || USE_POLARSSL || USE_QSOSSL || USE_NSS */
1422 #endif /* USE_SSLEAY || USE_GNUTLS */
1425 * Curl_http_done() gets called from Curl_done() after a single HTTP request
1426 * has been performed.
1429 CURLcode Curl_http_done(struct connectdata *conn,
1430 CURLcode status, bool premature)
1432 struct SessionHandle *data = conn->data;
1433 struct HTTP *http =data->state.proto.http;
1435 Curl_unencode_cleanup(conn);
1437 /* set the proper values (possibly modified on POST) */
1438 conn->fread_func = data->set.fread_func; /* restore */
1439 conn->fread_in = data->set.in; /* restore */
1440 conn->seek_func = data->set.seek_func; /* restore */
1441 conn->seek_client = data->set.seek_client; /* restore */
1446 if(http->send_buffer) {
1447 Curl_send_buffer *buff = http->send_buffer;
1451 http->send_buffer = NULL; /* clear the pointer */
1454 if(HTTPREQ_POST_FORM == data->set.httpreq) {
1455 data->req.bytecount = http->readbytecount + http->writebytecount;
1457 Curl_formclean(&http->sendit); /* Now free that whole lot */
1459 /* a file being uploaded was left opened, close it! */
1460 fclose(http->form.fp);
1461 http->form.fp = NULL;
1464 else if(HTTPREQ_PUT == data->set.httpreq)
1465 data->req.bytecount = http->readbytecount + http->writebytecount;
1467 if(status != CURLE_OK)
1470 if(!premature && /* this check is pointless when DONE is called before the
1471 entire operation is complete */
1472 !conn->bits.retry &&
1473 ((http->readbytecount +
1474 data->req.headerbytecount -
1475 data->req.deductheadercount)) <= 0) {
1476 /* If this connection isn't simply closed to be retried, AND nothing was
1477 read from the HTTP server (that counts), this can't be right so we
1478 return an error here */
1479 failf(data, "Empty reply from server");
1480 return CURLE_GOT_NOTHING;
1487 /* Determine if we should use HTTP 1.1 for this request. Reasons to avoid it
1488 are if the user specifically requested HTTP 1.0, if the server we are
1489 connected to only supports 1.0, or if any server previously contacted to
1490 handle this request only supports 1.0. */
1491 static bool use_http_1_1(const struct SessionHandle *data,
1492 const struct connectdata *conn)
1494 return ((data->set.httpversion == CURL_HTTP_VERSION_1_1) ||
1495 ((data->set.httpversion != CURL_HTTP_VERSION_1_0) &&
1496 ((conn->httpversion == 11) ||
1497 ((conn->httpversion != 10) &&
1498 (data->state.httpversion != 10))))) ? TRUE : FALSE;
1501 /* check and possibly add an Expect: header */
1502 static CURLcode expect100(struct SessionHandle *data,
1503 struct connectdata *conn,
1504 Curl_send_buffer *req_buffer)
1506 CURLcode result = CURLE_OK;
1508 data->state.expect100header = FALSE; /* default to false unless it is set
1510 if(use_http_1_1(data, conn)) {
1511 /* if not doing HTTP 1.0 or disabled explicitly, we add a Expect:
1512 100-continue to the headers which actually speeds up post operations
1513 (as there is one packet coming back from the web server) */
1514 ptr = Curl_checkheaders(data, "Expect:");
1516 data->state.expect100header =
1517 Curl_compareheader(ptr, "Expect:", "100-continue");
1520 result = Curl_add_bufferf(req_buffer,
1521 "Expect: 100-continue\r\n");
1522 if(result == CURLE_OK)
1523 data->state.expect100header = TRUE;
1529 CURLcode Curl_add_custom_headers(struct connectdata *conn,
1530 Curl_send_buffer *req_buffer)
1533 struct curl_slist *headers=conn->data->set.headers;
1536 ptr = strchr(headers->data, ':');
1538 /* we require a colon for this to be a true header */
1540 ptr++; /* pass the colon */
1541 while(*ptr && ISSPACE(*ptr))
1545 /* only send this if the contents was non-blank */
1547 if(conn->allocptr.host &&
1548 /* a Host: header was sent already, don't pass on any custom Host:
1549 header as that will produce *two* in the same request! */
1550 checkprefix("Host:", headers->data))
1552 else if(conn->data->set.httpreq == HTTPREQ_POST_FORM &&
1553 /* this header (extended by formdata.c) is sent later */
1554 checkprefix("Content-Type:", headers->data))
1556 else if(conn->bits.authneg &&
1557 /* while doing auth neg, don't allow the custom length since
1558 we will force length zero then */
1559 checkprefix("Content-Length", headers->data))
1561 else if(conn->allocptr.te &&
1562 /* when asking for Transfer-Encoding, don't pass on a custom
1564 checkprefix("Connection", headers->data))
1567 CURLcode result = Curl_add_bufferf(req_buffer, "%s\r\n",
1575 ptr = strchr(headers->data, ';');
1578 ptr++; /* pass the semicolon */
1579 while(*ptr && ISSPACE(*ptr))
1583 /* this may be used for something else in the future */
1586 if(*(--ptr) == ';') {
1589 /* send no-value custom header if terminated by semicolon */
1591 result = Curl_add_bufferf(req_buffer, "%s\r\n",
1599 headers = headers->next;
1604 CURLcode Curl_add_timecondition(struct SessionHandle *data,
1605 Curl_send_buffer *req_buffer)
1607 const struct tm *tm;
1608 char *buf = data->state.buffer;
1609 CURLcode result = CURLE_OK;
1612 result = Curl_gmtime(data->set.timevalue, &keeptime);
1614 failf(data, "Invalid TIMEVALUE\n");
1619 /* The If-Modified-Since header family should have their times set in
1620 * GMT as RFC2616 defines: "All HTTP date/time stamps MUST be
1621 * represented in Greenwich Mean Time (GMT), without exception. For the
1622 * purposes of HTTP, GMT is exactly equal to UTC (Coordinated Universal
1623 * Time)." (see page 20 of RFC2616).
1626 /* format: "Tue, 15 Nov 1994 12:45:26 GMT" */
1627 snprintf(buf, BUFSIZE-1,
1628 "%s, %02d %s %4d %02d:%02d:%02d GMT",
1629 Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
1631 Curl_month[tm->tm_mon],
1637 switch(data->set.timecondition) {
1638 case CURL_TIMECOND_IFMODSINCE:
1640 result = Curl_add_bufferf(req_buffer,
1641 "If-Modified-Since: %s\r\n", buf);
1643 case CURL_TIMECOND_IFUNMODSINCE:
1644 result = Curl_add_bufferf(req_buffer,
1645 "If-Unmodified-Since: %s\r\n", buf);
1647 case CURL_TIMECOND_LASTMOD:
1648 result = Curl_add_bufferf(req_buffer,
1649 "Last-Modified: %s\r\n", buf);
1657 * Curl_http() gets called from the generic Curl_do() function when a HTTP
1658 * request is to be performed. This creates and sends a properly constructed
1661 CURLcode Curl_http(struct connectdata *conn, bool *done)
1663 struct SessionHandle *data=conn->data;
1664 CURLcode result=CURLE_OK;
1666 const char *ppath = data->state.path;
1667 bool paste_ftp_userpwd = FALSE;
1668 char ftp_typecode[sizeof("/;type=?")] = "";
1669 const char *host = conn->host.name;
1670 const char *te = ""; /* transfer-encoding */
1672 const char *request;
1673 Curl_HttpReq httpreq = data->set.httpreq;
1674 char *addcookies = NULL;
1675 curl_off_t included_body = 0;
1676 const char *httpstring;
1677 Curl_send_buffer *req_buffer;
1678 curl_off_t postsize = 0; /* curl_off_t to handle large file sizes */
1679 int seekerr = CURL_SEEKFUNC_OK;
1681 /* Always consider the DO phase done after this function call, even if there
1682 may be parts of the request that is not yet sent, since we can deal with
1683 the rest of the request in the PERFORM phase. */
1686 /* If there already is a protocol-specific struct allocated for this
1687 sessionhandle, deal with it */
1688 Curl_reset_reqproto(conn);
1690 if(!data->state.proto.http) {
1691 /* Only allocate this struct if we don't already have it! */
1693 http = calloc(1, sizeof(struct HTTP));
1695 return CURLE_OUT_OF_MEMORY;
1696 data->state.proto.http = http;
1699 http = data->state.proto.http;
1701 if(!data->state.this_is_a_follow) {
1702 /* this is not a followed location, get the original host name */
1703 if(data->state.first_host)
1704 /* Free to avoid leaking memory on multiple requests*/
1705 free(data->state.first_host);
1707 data->state.first_host = strdup(conn->host.name);
1708 if(!data->state.first_host)
1709 return CURLE_OUT_OF_MEMORY;
1711 http->writebytecount = http->readbytecount = 0;
1713 if((conn->handler->protocol&(CURLPROTO_HTTP|CURLPROTO_FTP)) &&
1715 httpreq = HTTPREQ_PUT;
1718 /* Now set the 'request' pointer to the proper request string */
1719 if(data->set.str[STRING_CUSTOMREQUEST])
1720 request = data->set.str[STRING_CUSTOMREQUEST];
1722 if(data->set.opt_no_body)
1725 DEBUGASSERT((httpreq > HTTPREQ_NONE) && (httpreq < HTTPREQ_LAST));
1728 case HTTPREQ_POST_FORM:
1734 default: /* this should never happen */
1745 /* The User-Agent string might have been allocated in url.c already, because
1746 it might have been used in the proxy connect, but if we have got a header
1747 with the user-agent string specified, we erase the previously made string
1749 if(Curl_checkheaders(data, "User-Agent:") && conn->allocptr.uagent) {
1750 free(conn->allocptr.uagent);
1751 conn->allocptr.uagent=NULL;
1754 /* setup the authentication headers */
1755 result = Curl_http_output_auth(conn, request, ppath, FALSE);
1759 if((data->state.authhost.multi || data->state.authproxy.multi) &&
1760 (httpreq != HTTPREQ_GET) &&
1761 (httpreq != HTTPREQ_HEAD)) {
1762 /* Auth is required and we are not authenticated yet. Make a PUT or POST
1763 with content-length zero as a "probe". */
1764 conn->bits.authneg = TRUE;
1767 conn->bits.authneg = FALSE;
1769 Curl_safefree(conn->allocptr.ref);
1770 if(data->change.referer && !Curl_checkheaders(data, "Referer:"))
1771 conn->allocptr.ref = aprintf("Referer: %s\r\n", data->change.referer);
1773 conn->allocptr.ref = NULL;
1775 if(data->set.str[STRING_COOKIE] && !Curl_checkheaders(data, "Cookie:"))
1776 addcookies = data->set.str[STRING_COOKIE];
1778 if(!Curl_checkheaders(data, "Accept-Encoding:") &&
1779 data->set.str[STRING_ENCODING]) {
1780 Curl_safefree(conn->allocptr.accept_encoding);
1781 conn->allocptr.accept_encoding =
1782 aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
1783 if(!conn->allocptr.accept_encoding)
1784 return CURLE_OUT_OF_MEMORY;
1788 /* we only consider transfer-encoding magic if libz support is built-in */
1790 if(!Curl_checkheaders(data, "TE:") && data->set.http_transfer_encoding) {
1791 /* When we are to insert a TE: header in the request, we must also insert
1792 TE in a Connection: header, so we need to merge the custom provided
1793 Connection: header and prevent the original to get sent. Note that if
1794 the user has inserted his/hers own TE: header we don't do this magic
1795 but then assume that the user will handle it all! */
1796 char *cptr = Curl_checkheaders(data, "Connection:");
1797 #define TE_HEADER "TE: gzip\r\n"
1799 Curl_safefree(conn->allocptr.te);
1801 /* Create the (updated) Connection: header */
1802 conn->allocptr.te = cptr? aprintf("%s, TE\r\n" TE_HEADER, cptr):
1803 strdup("Connection: TE\r\n" TE_HEADER);
1805 if(!conn->allocptr.te)
1806 return CURLE_OUT_OF_MEMORY;
1810 ptr = Curl_checkheaders(data, "Transfer-Encoding:");
1812 /* Some kind of TE is requested, check if 'chunked' is chosen */
1813 data->req.upload_chunky =
1814 Curl_compareheader(ptr, "Transfer-Encoding:", "chunked");
1817 if((conn->handler->protocol&CURLPROTO_HTTP) &&
1819 (data->set.infilesize == -1)) {
1820 if(conn->bits.authneg)
1821 /* don't enable chunked during auth neg */
1823 else if(use_http_1_1(data, conn)) {
1824 /* HTTP, upload, unknown file size and not HTTP 1.0 */
1825 data->req.upload_chunky = TRUE;
1828 failf(data, "Chunky upload is not supported by HTTP 1.0");
1829 return CURLE_UPLOAD_FAILED;
1833 /* else, no chunky upload */
1834 data->req.upload_chunky = FALSE;
1837 if(data->req.upload_chunky)
1838 te = "Transfer-Encoding: chunked\r\n";
1841 Curl_safefree(conn->allocptr.host);
1843 ptr = Curl_checkheaders(data, "Host:");
1844 if(ptr && (!data->state.this_is_a_follow ||
1845 Curl_raw_equal(data->state.first_host, conn->host.name))) {
1846 #if !defined(CURL_DISABLE_COOKIES)
1847 /* If we have a given custom Host: header, we extract the host name in
1848 order to possibly use it for cookie reasons later on. We only allow the
1849 custom Host: header if this is NOT a redirect, as setting Host: in the
1850 redirected request is being out on thin ice. Except if the host name
1851 is the same as the first one! */
1852 char *cookiehost = copy_header_value(ptr);
1854 return CURLE_OUT_OF_MEMORY;
1856 /* ignore empty data */
1859 char *colon = strchr(cookiehost, ':');
1861 *colon = 0; /* The host must not include an embedded port number */
1862 Curl_safefree(conn->allocptr.cookiehost);
1863 conn->allocptr.cookiehost = cookiehost;
1867 conn->allocptr.host = NULL;
1870 /* When building Host: headers, we must put the host name within
1871 [brackets] if the host name is a plain IPv6-address. RFC2732-style. */
1873 if(((conn->given->protocol&CURLPROTO_HTTPS) &&
1874 (conn->remote_port == PORT_HTTPS)) ||
1875 ((conn->given->protocol&CURLPROTO_HTTP) &&
1876 (conn->remote_port == PORT_HTTP)) )
1877 /* if(HTTPS on port 443) OR (HTTP on port 80) then don't include
1878 the port number in the host string */
1879 conn->allocptr.host = aprintf("Host: %s%s%s\r\n",
1880 conn->bits.ipv6_ip?"[":"",
1882 conn->bits.ipv6_ip?"]":"");
1884 conn->allocptr.host = aprintf("Host: %s%s%s:%hu\r\n",
1885 conn->bits.ipv6_ip?"[":"",
1887 conn->bits.ipv6_ip?"]":"",
1890 if(!conn->allocptr.host)
1891 /* without Host: we can't make a nice request */
1892 return CURLE_OUT_OF_MEMORY;
1895 #ifndef CURL_DISABLE_PROXY
1896 if(conn->bits.httpproxy && !conn->bits.tunnel_proxy) {
1897 /* Using a proxy but does not tunnel through it */
1899 /* The path sent to the proxy is in fact the entire URL. But if the remote
1900 host is a IDN-name, we must make sure that the request we produce only
1901 uses the encoded host name! */
1902 if(conn->host.dispname != conn->host.name) {
1903 char *url = data->change.url;
1904 ptr = strstr(url, conn->host.dispname);
1906 /* This is where the display name starts in the URL, now replace this
1907 part with the encoded name. TODO: This method of replacing the host
1908 name is rather crude as I believe there's a slight risk that the
1909 user has entered a user name or password that contain the host name
1911 size_t currlen = strlen(conn->host.dispname);
1912 size_t newlen = strlen(conn->host.name);
1913 size_t urllen = strlen(url);
1917 newurl = malloc(urllen + newlen - currlen + 1);
1919 /* copy the part before the host name */
1920 memcpy(newurl, url, ptr - url);
1921 /* append the new host name instead of the old */
1922 memcpy(newurl + (ptr - url), conn->host.name, newlen);
1923 /* append the piece after the host name */
1924 memcpy(newurl + newlen + (ptr - url),
1925 ptr + currlen, /* copy the trailing zero byte too */
1926 urllen - (ptr-url) - currlen + 1);
1927 if(data->change.url_alloc) {
1928 Curl_safefree(data->change.url);
1929 data->change.url_alloc = FALSE;
1931 data->change.url = newurl;
1932 data->change.url_alloc = TRUE;
1935 return CURLE_OUT_OF_MEMORY;
1938 ppath = data->change.url;
1939 if(checkprefix("ftp://", ppath)) {
1940 if(data->set.proxy_transfer_mode) {
1941 /* when doing ftp, append ;type=<a|i> if not present */
1942 char *type = strstr(ppath, ";type=");
1943 if(type && type[6] && type[7] == 0) {
1944 switch (Curl_raw_toupper(type[6])) {
1954 char *p = ftp_typecode;
1955 /* avoid sending invalid URLs like ftp://example.com;type=i if the
1956 * user specified ftp://example.com without the slash */
1957 if(!*data->state.path && ppath[strlen(ppath) - 1] != '/') {
1960 snprintf(p, sizeof(ftp_typecode) - 1, ";type=%c",
1961 data->set.prefer_ascii ? 'a' : 'i');
1964 if(conn->bits.user_passwd && !conn->bits.userpwd_in_url)
1965 paste_ftp_userpwd = TRUE;
1968 #endif /* CURL_DISABLE_PROXY */
1970 if(HTTPREQ_POST_FORM == httpreq) {
1971 /* we must build the whole post sequence first, so that we have a size of
1972 the whole transfer before we start to send it */
1973 result = Curl_getformdata(data, &http->sendit, data->set.httppost,
1974 Curl_checkheaders(data, "Content-Type:"),
1980 http->p_accept = Curl_checkheaders(data, "Accept:")?NULL:"Accept: */*\r\n";
1982 if(( (HTTPREQ_POST == httpreq) ||
1983 (HTTPREQ_POST_FORM == httpreq) ||
1984 (HTTPREQ_PUT == httpreq) ) &&
1985 data->state.resume_from) {
1986 /**********************************************************************
1987 * Resuming upload in HTTP means that we PUT or POST and that we have
1988 * got a resume_from value set. The resume value has already created
1989 * a Range: header that will be passed along. We need to "fast forward"
1990 * the file the given number of bytes and decrease the assume upload
1991 * file size before we continue this venture in the dark lands of HTTP.
1992 *********************************************************************/
1994 if(data->state.resume_from < 0 ) {
1996 * This is meant to get the size of the present remote-file by itself.
1997 * We don't support this now. Bail out!
1999 data->state.resume_from = 0;
2002 if(data->state.resume_from && !data->state.this_is_a_follow) {
2003 /* do we still game? */
2005 /* Now, let's read off the proper amount of bytes from the
2007 if(conn->seek_func) {
2008 seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
2012 if(seekerr != CURL_SEEKFUNC_OK) {
2013 if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
2014 failf(data, "Could not seek stream");
2015 return CURLE_READ_ERROR;
2017 /* when seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
2019 curl_off_t passed=0;
2021 size_t readthisamountnow =
2022 (data->state.resume_from - passed > CURL_OFF_T_C(BUFSIZE)) ?
2023 BUFSIZE : curlx_sotouz(data->state.resume_from - passed);
2025 size_t actuallyread =
2026 data->set.fread_func(data->state.buffer, 1, readthisamountnow,
2029 passed += actuallyread;
2030 if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
2031 /* this checks for greater-than only to make sure that the
2032 CURL_READFUNC_ABORT return code still aborts */
2033 failf(data, "Could only read %" FORMAT_OFF_T
2034 " bytes from the input",
2036 return CURLE_READ_ERROR;
2038 } while(passed < data->state.resume_from);
2042 /* now, decrease the size of the read */
2043 if(data->set.infilesize>0) {
2044 data->set.infilesize -= data->state.resume_from;
2046 if(data->set.infilesize <= 0) {
2047 failf(data, "File already completely uploaded");
2048 return CURLE_PARTIAL_FILE;
2051 /* we've passed, proceed as normal */
2054 if(data->state.use_range) {
2056 * A range is selected. We use different headers whether we're downloading
2057 * or uploading and we always let customized headers override our internal
2058 * ones if any such are specified.
2060 if(((httpreq == HTTPREQ_GET) || (httpreq == HTTPREQ_HEAD)) &&
2061 !Curl_checkheaders(data, "Range:")) {
2062 /* if a line like this was already allocated, free the previous one */
2063 if(conn->allocptr.rangeline)
2064 free(conn->allocptr.rangeline);
2065 conn->allocptr.rangeline = aprintf("Range: bytes=%s\r\n",
2068 else if((httpreq != HTTPREQ_GET) &&
2069 !Curl_checkheaders(data, "Content-Range:")) {
2071 /* if a line like this was already allocated, free the previous one */
2072 if(conn->allocptr.rangeline)
2073 free(conn->allocptr.rangeline);
2075 if(data->set.set_resume_from < 0) {
2076 /* Upload resume was asked for, but we don't know the size of the
2077 remote part so we tell the server (and act accordingly) that we
2078 upload the whole file (again) */
2079 conn->allocptr.rangeline =
2080 aprintf("Content-Range: bytes 0-%" FORMAT_OFF_T
2081 "/%" FORMAT_OFF_T "\r\n",
2082 data->set.infilesize - 1, data->set.infilesize);
2085 else if(data->state.resume_from) {
2086 /* This is because "resume" was selected */
2087 curl_off_t total_expected_size=
2088 data->state.resume_from + data->set.infilesize;
2089 conn->allocptr.rangeline =
2090 aprintf("Content-Range: bytes %s%" FORMAT_OFF_T
2091 "/%" FORMAT_OFF_T "\r\n",
2092 data->state.range, total_expected_size-1,
2093 total_expected_size);
2096 /* Range was selected and then we just pass the incoming range and
2097 append total size */
2098 conn->allocptr.rangeline =
2099 aprintf("Content-Range: bytes %s/%" FORMAT_OFF_T "\r\n",
2100 data->state.range, data->set.infilesize);
2102 if(!conn->allocptr.rangeline)
2103 return CURLE_OUT_OF_MEMORY;
2107 /* Use 1.1 unless the user specifically asked for 1.0 or the server only
2109 httpstring= use_http_1_1(data, conn)?"1.1":"1.0";
2111 /* initialize a dynamic send-buffer */
2112 req_buffer = Curl_add_buffer_init();
2115 return CURLE_OUT_OF_MEMORY;
2117 /* add the main request stuff */
2118 /* GET/HEAD/POST/PUT */
2119 result = Curl_add_bufferf(req_buffer, "%s ", request);
2124 if(paste_ftp_userpwd)
2125 result = Curl_add_bufferf(req_buffer, "ftp://%s:%s@%s",
2126 conn->user, conn->passwd,
2127 ppath + sizeof("ftp://") - 1);
2129 result = Curl_add_buffer(req_buffer, ppath, strlen(ppath));
2134 Curl_add_bufferf(req_buffer,
2135 "%s" /* ftp typecode (;type=x) */
2136 " HTTP/%s\r\n" /* HTTP version */
2137 "%s" /* proxyuserpwd */
2140 "%s" /* user agent */
2144 "%s" /* accept-encoding */
2146 "%s" /* Proxy-Connection */
2147 "%s",/* transfer-encoding */
2151 conn->allocptr.proxyuserpwd?
2152 conn->allocptr.proxyuserpwd:"",
2153 conn->allocptr.userpwd?conn->allocptr.userpwd:"",
2154 (data->state.use_range && conn->allocptr.rangeline)?
2155 conn->allocptr.rangeline:"",
2156 (data->set.str[STRING_USERAGENT] &&
2157 *data->set.str[STRING_USERAGENT] &&
2158 conn->allocptr.uagent)?
2159 conn->allocptr.uagent:"",
2160 (conn->allocptr.host?conn->allocptr.host:""),
2161 http->p_accept?http->p_accept:"",
2162 conn->allocptr.te?conn->allocptr.te:"",
2163 (data->set.str[STRING_ENCODING] &&
2164 *data->set.str[STRING_ENCODING] &&
2165 conn->allocptr.accept_encoding)?
2166 conn->allocptr.accept_encoding:"",
2167 (data->change.referer && conn->allocptr.ref)?
2168 conn->allocptr.ref:"" /* Referer: <data> */,
2169 (conn->bits.httpproxy &&
2170 !conn->bits.tunnel_proxy &&
2171 !Curl_checkheaders(data, "Proxy-Connection:"))?
2172 "Proxy-Connection: Keep-Alive\r\n":"",
2177 * Free userpwd now --- cannot reuse this for Negotiate and possibly NTLM
2178 * with basic and digest, it will be freed anyway by the next request
2181 Curl_safefree (conn->allocptr.userpwd);
2182 conn->allocptr.userpwd = NULL;
2187 #if !defined(CURL_DISABLE_COOKIES)
2188 if(data->cookies || addcookies) {
2189 struct Cookie *co=NULL; /* no cookies from start */
2193 Curl_share_lock(data, CURL_LOCK_DATA_COOKIE, CURL_LOCK_ACCESS_SINGLE);
2194 co = Curl_cookie_getlist(data->cookies,
2195 conn->allocptr.cookiehost?
2196 conn->allocptr.cookiehost:host,
2198 (conn->handler->protocol&CURLPROTO_HTTPS)?
2200 Curl_share_unlock(data, CURL_LOCK_DATA_COOKIE);
2203 struct Cookie *store=co;
2204 /* now loop through all cookies that matched */
2208 result = Curl_add_bufferf(req_buffer, "Cookie: ");
2212 result = Curl_add_bufferf(req_buffer,
2213 "%s%s=%s", count?"; ":"",
2214 co->name, co->value);
2219 co = co->next; /* next cookie please */
2221 Curl_cookie_freelist(store, FALSE); /* free the cookie list */
2223 if(addcookies && (CURLE_OK == result)) {
2225 result = Curl_add_bufferf(req_buffer, "Cookie: ");
2226 if(CURLE_OK == result) {
2227 result = Curl_add_bufferf(req_buffer, "%s%s",
2233 if(count && (CURLE_OK == result))
2234 result = Curl_add_buffer(req_buffer, "\r\n", 2);
2241 if(data->set.timecondition) {
2242 result = Curl_add_timecondition(data, req_buffer);
2247 result = Curl_add_custom_headers(conn, req_buffer);
2251 http->postdata = NULL; /* nothing to post at this point */
2252 Curl_pgrsSetUploadSize(data, 0); /* upload size is 0 atm */
2254 /* If 'authdone' is FALSE, we must not set the write socket index to the
2255 Curl_transfer() call below, as we're not ready to actually upload any
2260 case HTTPREQ_POST_FORM:
2261 if(!http->sendit || conn->bits.authneg) {
2262 /* nothing to post! */
2263 result = Curl_add_bufferf(req_buffer, "Content-Length: 0\r\n\r\n");
2267 result = Curl_add_buffer_send(req_buffer, conn,
2268 &data->info.request_size, 0, FIRSTSOCKET);
2270 failf(data, "Failed sending POST request");
2272 /* setup variables for the upcoming transfer */
2273 Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE, &http->readbytecount,
2278 if(Curl_FormInit(&http->form, http->sendit)) {
2279 failf(data, "Internal HTTP POST error!");
2280 return CURLE_HTTP_POST_ERROR;
2283 /* Get the currently set callback function pointer and store that in the
2284 form struct since we might want the actual user-provided callback later
2285 on. The conn->fread_func pointer itself will be changed for the
2286 multipart case to the function that returns a multipart formatted
2288 http->form.fread_func = conn->fread_func;
2290 /* Set the read function to read from the generated form data */
2291 conn->fread_func = (curl_read_callback)Curl_FormReader;
2292 conn->fread_in = &http->form;
2294 http->sending = HTTPSEND_BODY;
2296 if(!data->req.upload_chunky &&
2297 !Curl_checkheaders(data, "Content-Length:")) {
2298 /* only add Content-Length if not uploading chunked */
2299 result = Curl_add_bufferf(req_buffer,
2300 "Content-Length: %" FORMAT_OFF_T "\r\n",
2306 result = expect100(data, conn, req_buffer);
2312 /* Get Content-Type: line from Curl_formpostheader.
2315 size_t linelength=0;
2316 contentType = Curl_formpostheader((void *)&http->form,
2319 failf(data, "Could not get Content-Type header line!");
2320 return CURLE_HTTP_POST_ERROR;
2323 result = Curl_add_buffer(req_buffer, contentType, linelength);
2328 /* make the request end in a true CRLF */
2329 result = Curl_add_buffer(req_buffer, "\r\n", 2);
2333 /* set upload size to the progress meter */
2334 Curl_pgrsSetUploadSize(data, http->postsize);
2336 /* fire away the whole request to the server */
2337 result = Curl_add_buffer_send(req_buffer, conn,
2338 &data->info.request_size, 0, FIRSTSOCKET);
2340 failf(data, "Failed sending POST request");
2342 /* setup variables for the upcoming transfer */
2343 Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
2344 &http->readbytecount, FIRSTSOCKET,
2345 &http->writebytecount);
2348 Curl_formclean(&http->sendit); /* free that whole lot */
2352 /* convert the form data */
2353 result = Curl_convert_form(data, http->sendit);
2355 Curl_formclean(&http->sendit); /* free that whole lot */
2361 case HTTPREQ_PUT: /* Let's PUT the data to the server! */
2363 if(conn->bits.authneg)
2366 postsize = data->set.infilesize;
2368 if((postsize != -1) && !data->req.upload_chunky &&
2369 !Curl_checkheaders(data, "Content-Length:")) {
2370 /* only add Content-Length if not uploading chunked */
2371 result = Curl_add_bufferf(req_buffer,
2372 "Content-Length: %" FORMAT_OFF_T "\r\n",
2378 result = expect100(data, conn, req_buffer);
2382 result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers */
2386 /* set the upload size to the progress meter */
2387 Curl_pgrsSetUploadSize(data, postsize);
2389 /* this sends the buffer and frees all the buffer resources */
2390 result = Curl_add_buffer_send(req_buffer, conn,
2391 &data->info.request_size, 0, FIRSTSOCKET);
2393 failf(data, "Failed sending PUT request");
2395 /* prepare for transfer */
2396 Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
2397 &http->readbytecount, postsize?FIRSTSOCKET:-1,
2398 postsize?&http->writebytecount:NULL);
2404 /* this is the simple POST, using x-www-form-urlencoded style */
2406 if(conn->bits.authneg)
2409 /* figure out the size of the postfields */
2410 postsize = (data->set.postfieldsize != -1)?
2411 data->set.postfieldsize:
2412 (data->set.postfields? (curl_off_t)strlen(data->set.postfields):-1);
2414 if(!data->req.upload_chunky) {
2415 /* We only set Content-Length and allow a custom Content-Length if
2416 we don't upload data chunked, as RFC2616 forbids us to set both
2417 kinds of headers (Transfer-Encoding: chunked and Content-Length) */
2419 if(conn->bits.authneg || !Curl_checkheaders(data, "Content-Length:")) {
2420 /* we allow replacing this header if not during auth negotiation,
2421 although it isn't very wise to actually set your own */
2422 result = Curl_add_bufferf(req_buffer,
2423 "Content-Length: %" FORMAT_OFF_T"\r\n",
2430 if(!Curl_checkheaders(data, "Content-Type:")) {
2431 result = Curl_add_bufferf(req_buffer,
2432 "Content-Type: application/"
2433 "x-www-form-urlencoded\r\n");
2438 /* For really small posts we don't use Expect: headers at all, and for
2439 the somewhat bigger ones we allow the app to disable it. Just make
2440 sure that the expect100header is always set to the preferred value
2442 ptr = Curl_checkheaders(data, "Expect:");
2444 data->state.expect100header =
2445 Curl_compareheader(ptr, "Expect:", "100-continue");
2447 else if(postsize > TINY_INITIAL_POST_SIZE || postsize < 0) {
2448 result = expect100(data, conn, req_buffer);
2453 data->state.expect100header = FALSE;
2455 if(data->set.postfields) {
2457 if(!data->state.expect100header &&
2458 (postsize < MAX_INITIAL_POST_SIZE)) {
2459 /* if we don't use expect: 100 AND
2460 postsize is less than MAX_INITIAL_POST_SIZE
2462 then append the post data to the HTTP request header. This limit
2463 is no magic limit but only set to prevent really huge POSTs to
2464 get the data duplicated with malloc() and family. */
2466 result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers! */
2470 if(!data->req.upload_chunky) {
2471 /* We're not sending it 'chunked', append it to the request
2472 already now to reduce the number if send() calls */
2473 result = Curl_add_buffer(req_buffer, data->set.postfields,
2475 included_body = postsize;
2478 /* Append the POST data chunky-style */
2479 result = Curl_add_bufferf(req_buffer, "%x\r\n", (int)postsize);
2480 if(CURLE_OK == result)
2481 result = Curl_add_buffer(req_buffer, data->set.postfields,
2483 if(CURLE_OK == result)
2484 result = Curl_add_buffer(req_buffer,
2485 "\x0d\x0a\x30\x0d\x0a\x0d\x0a", 7);
2486 /* CR LF 0 CR LF CR LF */
2487 included_body = postsize + 7;
2491 /* Make sure the progress information is accurate */
2492 Curl_pgrsSetUploadSize(data, postsize);
2495 /* A huge POST coming up, do data separate from the request */
2496 http->postsize = postsize;
2497 http->postdata = data->set.postfields;
2499 http->sending = HTTPSEND_BODY;
2501 conn->fread_func = (curl_read_callback)readmoredata;
2502 conn->fread_in = (void *)conn;
2504 /* set the upload size to the progress meter */
2505 Curl_pgrsSetUploadSize(data, http->postsize);
2507 result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers! */
2513 result = Curl_add_buffer(req_buffer, "\r\n", 2); /* end of headers! */
2517 if(data->req.upload_chunky && conn->bits.authneg) {
2518 /* Chunky upload is selected and we're negotiating auth still, send
2520 result = Curl_add_buffer(req_buffer,
2521 "\x0d\x0a\x30\x0d\x0a\x0d\x0a", 7);
2522 /* CR LF 0 CR LF CR LF */
2527 else if(data->set.postfieldsize) {
2528 /* set the upload size to the progress meter */
2529 Curl_pgrsSetUploadSize(data, postsize?postsize:-1);
2531 /* set the pointer to mark that we will send the post body using the
2532 read callback, but only if we're not in authenticate
2534 if(!conn->bits.authneg) {
2535 http->postdata = (char *)&http->postdata;
2536 http->postsize = postsize;
2540 /* issue the request */
2541 result = Curl_add_buffer_send(req_buffer, conn, &data->info.request_size,
2542 (size_t)included_body, FIRSTSOCKET);
2545 failf(data, "Failed sending HTTP POST request");
2547 Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
2548 &http->readbytecount, http->postdata?FIRSTSOCKET:-1,
2549 http->postdata?&http->writebytecount:NULL);
2553 result = Curl_add_buffer(req_buffer, "\r\n", 2);
2557 /* issue the request */
2558 result = Curl_add_buffer_send(req_buffer, conn,
2559 &data->info.request_size, 0, FIRSTSOCKET);
2562 failf(data, "Failed sending HTTP request");
2564 /* HTTP GET/HEAD download: */
2565 Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE, &http->readbytecount,
2566 http->postdata?FIRSTSOCKET:-1,
2567 http->postdata?&http->writebytecount:NULL);
2572 if(http->writebytecount) {
2573 /* if a request-body has been sent off, we make sure this progress is noted
2575 Curl_pgrsSetUploadCounter(data, http->writebytecount);
2576 if(Curl_pgrsUpdate(conn))
2577 result = CURLE_ABORTED_BY_CALLBACK;
2579 if(http->writebytecount >= postsize) {
2580 /* already sent the entire request body, mark the "upload" as
2582 infof(data, "upload completely sent off: %" FORMAT_OFF_T " out of "
2583 "%" FORMAT_OFF_T " bytes\n",
2584 http->writebytecount, postsize);
2585 data->req.upload_done = TRUE;
2586 data->req.keepon &= ~KEEP_SEND; /* we're done writing */
2587 data->req.exp100 = EXP100_SEND_DATA; /* already sent */
2597 * Returns TRUE if member of the list matches prefix of string
2600 checkhttpprefix(struct SessionHandle *data,
2603 struct curl_slist *head = data->set.http200aliases;
2605 #ifdef CURL_DOES_CONVERSIONS
2606 /* convert from the network encoding using a scratch area */
2607 char *scratch = strdup(s);
2608 if(NULL == scratch) {
2609 failf (data, "Failed to allocate memory for conversion!");
2610 return FALSE; /* can't return CURLE_OUT_OF_MEMORY so return FALSE */
2612 if(CURLE_OK != Curl_convert_from_network(data, scratch, strlen(s)+1)) {
2613 /* Curl_convert_from_network calls failf if unsuccessful */
2615 return FALSE; /* can't return CURLE_foobar so return FALSE */
2618 #endif /* CURL_DOES_CONVERSIONS */
2621 if(checkprefix(head->data, s)) {
2628 if(!rc && (checkprefix("HTTP/", s)))
2631 #ifdef CURL_DOES_CONVERSIONS
2633 #endif /* CURL_DOES_CONVERSIONS */
2637 #ifndef CURL_DISABLE_RTSP
2639 checkrtspprefix(struct SessionHandle *data,
2643 #ifdef CURL_DOES_CONVERSIONS
2644 /* convert from the network encoding using a scratch area */
2645 char *scratch = strdup(s);
2646 if(NULL == scratch) {
2647 failf (data, "Failed to allocate memory for conversion!");
2648 return FALSE; /* can't return CURLE_OUT_OF_MEMORY so return FALSE */
2650 if(CURLE_OK != Curl_convert_from_network(data, scratch, strlen(s)+1)) {
2651 /* Curl_convert_from_network calls failf if unsuccessful */
2653 return FALSE; /* can't return CURLE_foobar so return FALSE */
2657 (void)data; /* unused */
2658 #endif /* CURL_DOES_CONVERSIONS */
2659 if(checkprefix("RTSP/", s))
2664 #endif /* CURL_DISABLE_RTSP */
2667 checkprotoprefix(struct SessionHandle *data, struct connectdata *conn,
2670 #ifndef CURL_DISABLE_RTSP
2671 if(conn->handler->protocol & CURLPROTO_RTSP)
2672 return checkrtspprefix(data, s);
2675 #endif /* CURL_DISABLE_RTSP */
2677 return checkhttpprefix(data, s);
2681 * header_append() copies a chunk of data to the end of the already received
2682 * header. We make sure that the full string fit in the allocated header
2683 * buffer, or else we enlarge it.
2685 static CURLcode header_append(struct SessionHandle *data,
2686 struct SingleRequest *k,
2689 if(k->hbuflen + length >= data->state.headersize) {
2690 /* We enlarge the header buffer as it is too small */
2695 if(k->hbuflen + length > CURL_MAX_HTTP_HEADER) {
2696 /* The reason to have a max limit for this is to avoid the risk of a bad
2697 server feeding libcurl with a never-ending header that will cause
2698 reallocs infinitely */
2699 failf (data, "Avoided giant realloc for header (max is %d)!",
2700 CURL_MAX_HTTP_HEADER);
2701 return CURLE_OUT_OF_MEMORY;
2704 newsize=CURLMAX((k->hbuflen+ length)*3/2, data->state.headersize*2);
2705 hbufp_index = k->hbufp - data->state.headerbuff;
2706 newbuff = realloc(data->state.headerbuff, newsize);
2708 failf (data, "Failed to alloc memory for big header!");
2709 return CURLE_OUT_OF_MEMORY;
2711 data->state.headersize=newsize;
2712 data->state.headerbuff = newbuff;
2713 k->hbufp = data->state.headerbuff + hbufp_index;
2715 memcpy(k->hbufp, k->str_start, length);
2717 k->hbuflen += length;
2725 * Read any HTTP header lines from the server and pass them to the client app.
2727 CURLcode Curl_http_readwrite_headers(struct SessionHandle *data,
2728 struct connectdata *conn,
2733 struct SingleRequest *k = &data->req;
2735 /* header line within buffer loop */
2741 /* str_start is start of line within buf */
2742 k->str_start = k->str;
2744 /* data is in network encoding so use 0x0a instead of '\n' */
2745 k->end_ptr = memchr(k->str_start, 0x0a, *nread);
2748 /* Not a complete header line within buffer, append the data to
2749 the end of the headerbuff. */
2750 result = header_append(data, k, *nread);
2754 if(!k->headerline && (k->hbuflen>5)) {
2755 /* make a first check that this looks like a protocol header */
2756 if(!checkprotoprefix(data, conn, data->state.headerbuff)) {
2757 /* this is not the beginning of a protocol first header line */
2759 k->badheader = HEADER_ALLBAD;
2764 break; /* read more and try again */
2767 /* decrease the size of the remaining (supposed) header line */
2768 rest_length = (k->end_ptr - k->str)+1;
2769 *nread -= (ssize_t)rest_length;
2771 k->str = k->end_ptr + 1; /* move past new line */
2773 full_length = k->str - k->str_start;
2775 result = header_append(data, k, full_length);
2779 k->end_ptr = k->hbufp;
2780 k->p = data->state.headerbuff;
2783 * We now have a FULL header line that p points to
2786 if(!k->headerline) {
2787 /* the first read header */
2788 if((k->hbuflen>5) &&
2789 !checkprotoprefix(data, conn, data->state.headerbuff)) {
2790 /* this is not the beginning of a protocol first header line */
2793 /* since there's more, this is a partial bad header */
2794 k->badheader = HEADER_PARTHEADER;
2796 /* this was all we read so it's all a bad header */
2797 k->badheader = HEADER_ALLBAD;
2798 *nread = (ssize_t)rest_length;
2804 /* headers are in network encoding so
2805 use 0x0a and 0x0d instead of '\n' and '\r' */
2806 if((0x0a == *k->p) || (0x0d == *k->p)) {
2808 /* Zero-length header line means end of headers! */
2810 #ifdef CURL_DOES_CONVERSIONS
2812 *k->p = '\r'; /* replace with CR in host encoding */
2813 k->p++; /* pass the CR byte */
2816 *k->p = '\n'; /* replace with LF in host encoding */
2817 k->p++; /* pass the LF byte */
2821 k->p++; /* pass the \r byte */
2823 k->p++; /* pass the \n byte */
2824 #endif /* CURL_DOES_CONVERSIONS */
2826 if(100 <= k->httpcode && 199 >= k->httpcode) {
2828 * We have made a HTTP PUT or POST and this is 1.1-lingo
2829 * that tells us that the server is OK with this and ready
2830 * to receive the data.
2831 * However, we'll get more headers now so we must get
2832 * back into the header-parsing state!
2835 k->headerline = 0; /* restart the header line counter */
2837 /* if we did wait for this do enable write now! */
2839 k->exp100 = EXP100_SEND_DATA;
2840 k->keepon |= KEEP_SEND;
2844 k->header = FALSE; /* no more header to parse! */
2846 if((k->size == -1) && !k->chunk && !conn->bits.close &&
2847 (conn->httpversion >= 11) &&
2848 !(conn->handler->protocol & CURLPROTO_RTSP)) {
2849 /* On HTTP 1.1, when connection is not to get closed, but no
2850 Content-Length nor Content-Encoding chunked have been
2851 received, according to RFC2616 section 4.4 point 5, we
2852 assume that the server will close the connection to
2853 signal the end of the document. */
2854 infof(data, "no chunk, no close, no size. Assume close to "
2856 conn->bits.close = TRUE;
2861 * When all the headers have been parsed, see if we should give
2862 * up and return an error.
2864 if(http_should_fail(conn)) {
2865 failf (data, "The requested URL returned error: %d",
2867 return CURLE_HTTP_RETURNED_ERROR;
2870 /* now, only output this if the header AND body are requested:
2872 writetype = CLIENTWRITE_HEADER;
2873 if(data->set.include_header)
2874 writetype |= CLIENTWRITE_BODY;
2876 headerlen = k->p - data->state.headerbuff;
2878 result = Curl_client_write(conn, writetype,
2879 data->state.headerbuff,
2884 data->info.header_size += (long)headerlen;
2885 data->req.headerbytecount += (long)headerlen;
2887 data->req.deductheadercount =
2888 (100 <= k->httpcode && 199 >= k->httpcode)?data->req.headerbytecount:0;
2890 if(!*stop_reading) {
2891 /* Curl_http_auth_act() checks what authentication methods
2892 * that are available and decides which one (if any) to
2893 * use. It will set 'newurl' if an auth method was picked. */
2894 result = Curl_http_auth_act(conn);
2899 if(k->httpcode >= 300) {
2900 if((!conn->bits.authneg) && !conn->bits.close &&
2901 !conn->bits.rewindaftersend) {
2903 * General treatment of errors when about to send data. Including :
2904 * "417 Expectation Failed", while waiting for 100-continue.
2906 * The check for close above is done simply because of something
2907 * else has already deemed the connection to get closed then
2908 * something else should've considered the big picture and we
2911 * rewindaftersend indicates that something has told libcurl to
2912 * continue sending even if it gets discarded
2915 switch(data->set.httpreq) {
2918 case HTTPREQ_POST_FORM:
2919 /* We got an error response. If this happened before the whole
2920 * request body has been sent we stop sending and mark the
2921 * connection for closure after we've read the entire response.
2923 if(!k->upload_done) {
2924 infof(data, "HTTP error before end of send, stop sending\n");
2925 conn->bits.close = TRUE; /* close after this */
2926 k->upload_done = TRUE;
2927 k->keepon &= ~KEEP_SEND; /* don't send */
2928 if(data->state.expect100header)
2929 k->exp100 = EXP100_FAILED;
2933 default: /* default label present to avoid compiler warnings */
2939 if(conn->bits.rewindaftersend) {
2940 /* We rewind after a complete send, so thus we continue
2942 infof(data, "Keep sending data to get tossed away!\n");
2943 k->keepon |= KEEP_SEND;
2949 * really end-of-headers.
2951 * If we requested a "no body", this is a good time to get
2952 * out and return home.
2954 if(data->set.opt_no_body)
2955 *stop_reading = TRUE;
2957 /* If we know the expected size of this document, we set the
2958 maximum download size to the size of the expected
2959 document or else, we won't know when to stop reading!
2961 Note that we set the download maximum even if we read a
2962 "Connection: close" header, to make sure that
2963 "Content-Length: 0" still prevents us from attempting to
2964 read the (missing) response-body.
2966 /* According to RFC2616 section 4.4, we MUST ignore
2967 Content-Length: headers if we are now receiving data
2968 using chunked Transfer-Encoding.
2971 k->maxdownload = k->size = -1;
2974 /* We do this operation even if no_body is true, since this
2975 data might be retrieved later with curl_easy_getinfo()
2976 and its CURLINFO_CONTENT_LENGTH_DOWNLOAD option. */
2978 Curl_pgrsSetDownloadSize(data, k->size);
2979 k->maxdownload = k->size;
2982 /* If max download size is *zero* (nothing) we already
2983 have nothing and can safely return ok now! */
2984 if(0 == k->maxdownload)
2985 *stop_reading = TRUE;
2988 /* we make sure that this socket isn't read more now */
2989 k->keepon &= ~KEEP_RECV;
2992 if(data->set.verbose)
2993 Curl_debug(data, CURLINFO_HEADER_IN,
2994 k->str_start, headerlen, conn);
2995 break; /* exit header line loop */
2998 /* We continue reading headers, so reset the line-based
2999 header parsing variables hbufp && hbuflen */
3000 k->hbufp = data->state.headerbuff;
3006 * Checks for special headers coming up.
3009 if(!k->headerline++) {
3010 /* This is the first header, it MUST be the error code line
3011 or else we consider this to be the body right away! */
3012 int httpversion_major;
3013 int rtspversion_major;
3015 #ifdef CURL_DOES_CONVERSIONS
3016 #define HEADER1 scratch
3017 #define SCRATCHSIZE 21
3019 char scratch[SCRATCHSIZE+1]; /* "HTTP/major.minor 123" */
3020 /* We can't really convert this yet because we
3021 don't know if it's the 1st header line or the body.
3022 So we do a partial conversion into a scratch area,
3023 leaving the data at k->p as-is.
3025 strncpy(&scratch[0], k->p, SCRATCHSIZE);
3026 scratch[SCRATCHSIZE] = 0; /* null terminate */
3027 res = Curl_convert_from_network(data,
3031 /* Curl_convert_from_network calls failf if unsuccessful */
3034 #define HEADER1 k->p /* no conversion needed, just use k->p */
3035 #endif /* CURL_DOES_CONVERSIONS */
3037 if(conn->handler->protocol & CURLPROTO_HTTP) {
3038 nc = sscanf(HEADER1,
3044 conn->httpversion += 10 * httpversion_major;
3047 /* this is the real world, not a Nirvana
3048 NCSA 1.5.x returns this crap when asked for HTTP/1.1
3050 nc=sscanf(HEADER1, " HTTP %3d", &k->httpcode);
3051 conn->httpversion = 10;
3053 /* If user has set option HTTP200ALIASES,
3054 compare header line against list of aliases
3057 if(checkhttpprefix(data, k->p)) {
3060 conn->httpversion = 10;
3065 else if(conn->handler->protocol & CURLPROTO_RTSP) {
3066 nc = sscanf(HEADER1,
3072 conn->rtspversion += 10 * rtspversion_major;
3073 conn->httpversion = 11; /* For us, RTSP acts like HTTP 1.1 */
3076 /* TODO: do we care about the other cases here? */
3082 data->info.httpcode = k->httpcode;
3084 data->info.httpversion = conn->httpversion;
3085 if(!data->state.httpversion ||
3086 data->state.httpversion > conn->httpversion)
3087 /* store the lowest server version we encounter */
3088 data->state.httpversion = conn->httpversion;
3091 * This code executes as part of processing the header. As a
3092 * result, it's not totally clear how to interpret the
3093 * response code yet as that depends on what other headers may
3094 * be present. 401 and 407 may be errors, but may be OK
3095 * depending on how authentication is working. Other codes
3096 * are definitely errors, so give up here.
3098 if(data->set.http_fail_on_error && (k->httpcode >= 400) &&
3099 ((k->httpcode != 401) || !conn->bits.user_passwd) &&
3100 ((k->httpcode != 407) || !conn->bits.proxy_user_passwd) ) {
3102 if(data->state.resume_from &&
3103 (data->set.httpreq==HTTPREQ_GET) &&
3104 (k->httpcode == 416)) {
3105 /* "Requested Range Not Satisfiable", just proceed and
3106 pretend this is no error */
3109 /* serious error, go home! */
3110 failf (data, "The requested URL returned error: %d",
3112 return CURLE_HTTP_RETURNED_ERROR;
3116 if(conn->httpversion == 10) {
3117 /* Default action for HTTP/1.0 must be to close, unless
3118 we get one of those fancy headers that tell us the
3119 server keeps it open for us! */
3120 infof(data, "HTTP 1.0, assume close after body\n");
3121 conn->bits.close = TRUE;
3123 else if(conn->httpversion >= 11 &&
3124 !conn->bits.close) {
3125 /* If HTTP version is >= 1.1 and connection is persistent
3126 server supports pipelining. */
3128 "HTTP 1.1 or later with persistent connection, "
3129 "pipelining supported\n"));
3130 conn->server_supports_pipelining = TRUE;
3133 switch(k->httpcode) {
3135 /* (quote from RFC2616, section 10.2.5): The server has
3136 * fulfilled the request but does not need to return an
3137 * entity-body ... The 204 response MUST NOT include a
3138 * message-body, and thus is always terminated by the first
3139 * empty line after the header fields. */
3142 /* (quote from RFC2616, section 10.3.5): The 304 response
3143 * MUST NOT contain a message-body, and thus is always
3144 * terminated by the first empty line after the header
3146 if(data->set.timecondition)
3147 data->info.timecond = TRUE;
3150 k->ignorecl = TRUE; /* ignore Content-Length headers */
3158 k->header = FALSE; /* this is not a header line */
3163 result = Curl_convert_from_network(data, k->p, strlen(k->p));
3164 /* Curl_convert_from_network calls failf if unsuccessful */
3168 /* Check for Content-Length: header lines to get size */
3169 if(!k->ignorecl && !data->set.ignorecl &&
3170 checkprefix("Content-Length:", k->p)) {
3171 curl_off_t contentlength = curlx_strtoofft(k->p+15, NULL, 10);
3172 if(data->set.max_filesize &&
3173 contentlength > data->set.max_filesize) {
3174 failf(data, "Maximum file size exceeded");
3175 return CURLE_FILESIZE_EXCEEDED;
3177 if(contentlength >= 0) {
3178 k->size = contentlength;
3179 k->maxdownload = k->size;
3180 /* we set the progress download size already at this point
3181 just to make it easier for apps/callbacks to extract this
3182 info as soon as possible */
3183 Curl_pgrsSetDownloadSize(data, k->size);
3186 /* Negative Content-Length is really odd, and we know it
3187 happens for example when older Apache servers send large
3189 conn->bits.close = TRUE;
3190 infof(data, "Negative content-length: %" FORMAT_OFF_T
3191 ", closing after transfer\n", contentlength);
3194 /* check for Content-Type: header lines to get the MIME-type */
3195 else if(checkprefix("Content-Type:", k->p)) {
3196 char *contenttype = copy_header_value(k->p);
3198 return CURLE_OUT_OF_MEMORY;
3200 /* ignore empty data */
3203 Curl_safefree(data->info.contenttype);
3204 data->info.contenttype = contenttype;
3207 else if((conn->httpversion == 10) &&
3208 conn->bits.httpproxy &&
3209 Curl_compareheader(k->p,
3210 "Proxy-Connection:", "keep-alive")) {
3212 * When a HTTP/1.0 reply comes when using a proxy, the
3213 * 'Proxy-Connection: keep-alive' line tells us the
3214 * connection will be kept alive for our pleasure.
3215 * Default action for 1.0 is to close.
3217 conn->bits.close = FALSE; /* don't close when done */
3218 infof(data, "HTTP/1.0 proxy connection set to keep alive!\n");
3220 else if((conn->httpversion == 11) &&
3221 conn->bits.httpproxy &&
3222 Curl_compareheader(k->p,
3223 "Proxy-Connection:", "close")) {
3225 * We get a HTTP/1.1 response from a proxy and it says it'll
3226 * close down after this transfer.
3228 conn->bits.close = TRUE; /* close when done */
3229 infof(data, "HTTP/1.1 proxy connection set close!\n");
3231 else if((conn->httpversion == 10) &&
3232 Curl_compareheader(k->p, "Connection:", "keep-alive")) {
3234 * A HTTP/1.0 reply with the 'Connection: keep-alive' line
3235 * tells us the connection will be kept alive for our
3236 * pleasure. Default action for 1.0 is to close.
3238 * [RFC2068, section 19.7.1] */
3239 conn->bits.close = FALSE; /* don't close when done */
3240 infof(data, "HTTP/1.0 connection set to keep alive!\n");
3242 else if(Curl_compareheader(k->p, "Connection:", "close")) {
3244 * [RFC 2616, section 8.1.2.1]
3245 * "Connection: close" is HTTP/1.1 language and means that
3246 * the connection will close when this request has been
3249 conn->bits.close = TRUE; /* close when done */
3251 else if(checkprefix("Transfer-Encoding:", k->p)) {
3252 /* One or more encodings. We check for chunked and/or a compression
3255 * [RFC 2616, section 3.6.1] A 'chunked' transfer encoding
3256 * means that the server will send a series of "chunks". Each
3257 * chunk starts with line with info (including size of the
3258 * coming block) (terminated with CRLF), then a block of data
3259 * with the previously mentioned size. There can be any amount
3260 * of chunks, and a chunk-data set to zero signals the
3265 /* Find the first non-space letter */
3269 /* skip whitespaces and commas */
3270 while(*start && (ISSPACE(*start) || (*start == ',')))
3273 if(checkprefix("chunked", start)) {
3274 k->chunk = TRUE; /* chunks coming our way */
3276 /* init our chunky engine */
3277 Curl_httpchunk_init(conn);
3282 if(k->auto_decoding)
3283 /* TODO: we only support the first mentioned compression for now */
3286 if(checkprefix("identity", start)) {
3287 k->auto_decoding = IDENTITY;
3290 else if(checkprefix("deflate", start)) {
3291 k->auto_decoding = DEFLATE;
3294 else if(checkprefix("gzip", start)) {
3295 k->auto_decoding = GZIP;
3298 else if(checkprefix("x-gzip", start)) {
3299 k->auto_decoding = GZIP;
3302 else if(checkprefix("compress", start)) {
3303 k->auto_decoding = COMPRESS;
3306 else if(checkprefix("x-compress", start)) {
3307 k->auto_decoding = COMPRESS;
3317 else if(checkprefix("Content-Encoding:", k->p) &&
3318 data->set.str[STRING_ENCODING]) {
3320 * Process Content-Encoding. Look for the values: identity,
3321 * gzip, deflate, compress, x-gzip and x-compress. x-gzip and
3322 * x-compress are the same as gzip and compress. (Sec 3.5 RFC
3323 * 2616). zlib cannot handle compress. However, errors are
3324 * handled further down when the response body is processed
3328 /* Find the first non-space letter */
3330 while(*start && ISSPACE(*start))
3333 /* Record the content-encoding for later use */
3334 if(checkprefix("identity", start))
3335 k->auto_decoding = IDENTITY;
3336 else if(checkprefix("deflate", start))
3337 k->auto_decoding = DEFLATE;
3338 else if(checkprefix("gzip", start)
3339 || checkprefix("x-gzip", start))
3340 k->auto_decoding = GZIP;
3341 else if(checkprefix("compress", start)
3342 || checkprefix("x-compress", start))
3343 k->auto_decoding = COMPRESS;
3345 else if(checkprefix("Content-Range:", k->p)) {
3346 /* Content-Range: bytes [num]-
3347 Content-Range: bytes: [num]-
3348 Content-Range: [num]-
3350 The second format was added since Sun's webserver
3351 JavaWebServer/1.1.1 obviously sends the header this way!
3352 The third added since some servers use that!
3355 char *ptr = k->p + 14;
3357 /* Move forward until first digit */
3358 while(*ptr && !ISDIGIT(*ptr))
3361 k->offset = curlx_strtoofft(ptr, NULL, 10);
3363 if(data->state.resume_from == k->offset)
3364 /* we asked for a resume and we got it */
3365 k->content_range = TRUE;
3367 #if !defined(CURL_DISABLE_COOKIES)
3368 else if(data->cookies &&
3369 checkprefix("Set-Cookie:", k->p)) {
3370 Curl_share_lock(data, CURL_LOCK_DATA_COOKIE,
3371 CURL_LOCK_ACCESS_SINGLE);
3372 Curl_cookie_add(data,
3373 data->cookies, TRUE, k->p+11,
3374 /* If there is a custom-set Host: name, use it
3375 here, or else use real peer host name. */
3376 conn->allocptr.cookiehost?
3377 conn->allocptr.cookiehost:conn->host.name,
3379 Curl_share_unlock(data, CURL_LOCK_DATA_COOKIE);
3382 else if(checkprefix("Last-Modified:", k->p) &&
3383 (data->set.timecondition || data->set.get_filetime) ) {
3384 time_t secs=time(NULL);
3385 k->timeofdoc = curl_getdate(k->p+strlen("Last-Modified:"),
3387 if(data->set.get_filetime)
3388 data->info.filetime = (long)k->timeofdoc;
3390 else if((checkprefix("WWW-Authenticate:", k->p) &&
3391 (401 == k->httpcode)) ||
3392 (checkprefix("Proxy-authenticate:", k->p) &&
3393 (407 == k->httpcode))) {
3394 result = Curl_http_input_auth(conn, k->httpcode, k->p);
3398 else if((k->httpcode >= 300 && k->httpcode < 400) &&
3399 checkprefix("Location:", k->p) &&
3400 !data->req.location) {
3401 /* this is the URL that the server advises us to use instead */
3402 char *location = copy_header_value(k->p);
3404 return CURLE_OUT_OF_MEMORY;
3406 /* ignore empty data */
3409 data->req.location = location;
3411 if(data->set.http_follow_location) {
3412 DEBUGASSERT(!data->req.newurl);
3413 data->req.newurl = strdup(data->req.location); /* clone */
3414 if(!data->req.newurl)
3415 return CURLE_OUT_OF_MEMORY;
3417 /* some cases of POST and PUT etc needs to rewind the data
3418 stream at this point */
3419 result = http_perhapsrewind(conn);
3425 else if(conn->handler->protocol & CURLPROTO_RTSP) {
3426 result = Curl_rtsp_parseheader(conn, k->p);
3432 * End of header-checks. Write them to the client.
3435 writetype = CLIENTWRITE_HEADER;
3436 if(data->set.include_header)
3437 writetype |= CLIENTWRITE_BODY;
3439 if(data->set.verbose)
3440 Curl_debug(data, CURLINFO_HEADER_IN,
3441 k->p, (size_t)k->hbuflen, conn);
3443 result = Curl_client_write(conn, writetype, k->p, k->hbuflen);
3447 data->info.header_size += (long)k->hbuflen;
3448 data->req.headerbytecount += (long)k->hbuflen;
3450 /* reset hbufp pointer && hbuflen */
3451 k->hbufp = data->state.headerbuff;
3454 while(!*stop_reading && *k->str); /* header line within buffer */
3456 /* We might have reached the end of the header part here, but
3457 there might be a non-header part left in the end of the read
3463 #endif /* CURL_DISABLE_HTTP */