1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2016, 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 https://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 ***************************************************************************/
23 #include "curl_setup.h"
25 #ifndef CURL_DISABLE_FILE
27 #ifdef HAVE_NETINET_IN_H
28 #include <netinet/in.h>
33 #ifdef HAVE_ARPA_INET_H
34 #include <arpa/inet.h>
39 #ifdef HAVE_SYS_IOCTL_H
40 #include <sys/ioctl.h>
43 #ifdef HAVE_SYS_PARAM_H
44 #include <sys/param.h>
51 #include "strtoofft.h"
53 #include <curl/curl.h>
58 #include "speedcheck.h"
62 #include "parsedate.h" /* for the week day and month names */
64 /* The last 3 #include files should be in this order */
65 #include "curl_printf.h"
66 #include "curl_memory.h"
69 #if defined(WIN32) || defined(MSDOS) || defined(__EMX__) || \
70 defined(__SYMBIAN32__)
71 #define DOS_FILESYSTEM 1
74 #ifdef OPEN_NEEDS_ARG3
75 # define open_readonly(p,f) open((p),(f),(0))
77 # define open_readonly(p,f) open((p),(f))
81 * Forward declarations.
84 static CURLcode file_do(struct connectdata *, bool *done);
85 static CURLcode file_done(struct connectdata *conn,
86 CURLcode status, bool premature);
87 static CURLcode file_connect(struct connectdata *conn, bool *done);
88 static CURLcode file_disconnect(struct connectdata *conn,
89 bool dead_connection);
90 static CURLcode file_setup_connection(struct connectdata *conn);
93 * FILE scheme handler.
96 const struct Curl_handler Curl_handler_file = {
98 file_setup_connection, /* setup_connection */
100 file_done, /* done */
101 ZERO_NULL, /* do_more */
102 file_connect, /* connect_it */
103 ZERO_NULL, /* connecting */
104 ZERO_NULL, /* doing */
105 ZERO_NULL, /* proto_getsock */
106 ZERO_NULL, /* doing_getsock */
107 ZERO_NULL, /* domore_getsock */
108 ZERO_NULL, /* perform_getsock */
109 file_disconnect, /* disconnect */
110 ZERO_NULL, /* readwrite */
112 CURLPROTO_FILE, /* protocol */
113 PROTOPT_NONETWORK | PROTOPT_NOURLQUERY /* flags */
117 static CURLcode file_setup_connection(struct connectdata *conn)
119 /* allocate the FILE specific struct */
120 conn->data->req.protop = calloc(1, sizeof(struct FILEPROTO));
121 if(!conn->data->req.protop)
122 return CURLE_OUT_OF_MEMORY;
128 Check if this is a range download, and if so, set the internal variables
129 properly. This code is copied from the FTP implementation and might as
130 well be factored out.
132 static CURLcode file_range(struct connectdata *conn)
135 curl_off_t totalsize=-1;
138 struct Curl_easy *data = conn->data;
140 if(data->state.use_range && data->state.range) {
141 from=curlx_strtoofft(data->state.range, &ptr, 0);
142 while(*ptr && (ISSPACE(*ptr) || (*ptr=='-')))
144 to=curlx_strtoofft(ptr, &ptr2, 0);
146 /* we didn't get any digit */
149 if((-1 == to) && (from>=0)) {
151 data->state.resume_from = from;
152 DEBUGF(infof(data, "RANGE %" CURL_FORMAT_CURL_OFF_T " to end of file\n",
157 data->req.maxdownload = -from;
158 data->state.resume_from = from;
159 DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes\n",
165 data->req.maxdownload = totalsize+1; /* include last byte */
166 data->state.resume_from = from;
167 DEBUGF(infof(data, "RANGE from %" CURL_FORMAT_CURL_OFF_T
168 " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
169 from, data->req.maxdownload));
171 DEBUGF(infof(data, "range-download from %" CURL_FORMAT_CURL_OFF_T
172 " to %" CURL_FORMAT_CURL_OFF_T ", totally %"
173 CURL_FORMAT_CURL_OFF_T " bytes\n",
174 from, to, data->req.maxdownload));
177 data->req.maxdownload = -1;
182 * file_connect() gets called from Curl_protocol_connect() to allow us to
183 * do protocol-specific actions at connect-time. We emulate a
184 * connect-then-transfer protocol and "connect" to the file here
186 static CURLcode file_connect(struct connectdata *conn, bool *done)
188 struct Curl_easy *data = conn->data;
190 struct FILEPROTO *file = data->req.protop;
192 #ifdef DOS_FILESYSTEM
196 size_t real_path_len;
198 CURLcode result = Curl_urldecode(data, data->state.path, 0, &real_path,
199 &real_path_len, FALSE);
203 #ifdef DOS_FILESYSTEM
204 /* If the first character is a slash, and there's
205 something that looks like a drive at the beginning of
206 the path, skip the slash. If we remove the initial
207 slash in all cases, paths without drive letters end up
208 relative to the current directory which isn't how
211 Some browsers accept | instead of : as the drive letter
212 separator, so we do too.
214 On other platforms, we need the slash to indicate an
215 absolute pathname. On Windows, absolute paths start
218 actual_path = real_path;
219 if((actual_path[0] == '/') &&
221 (actual_path[2] == ':' || actual_path[2] == '|')) {
222 actual_path[2] = ':';
227 /* change path separators from '/' to '\\' for DOS, Windows and OS/2 */
228 for(i=0; i < real_path_len; ++i)
229 if(actual_path[i] == '/')
230 actual_path[i] = '\\';
231 else if(!actual_path[i]) { /* binary zero */
232 Curl_safefree(real_path);
233 return CURLE_URL_MALFORMAT;
236 fd = open_readonly(actual_path, O_RDONLY|O_BINARY);
237 file->path = actual_path;
239 if(memchr(real_path, 0, real_path_len)) {
240 /* binary zeroes indicate foul play */
241 Curl_safefree(real_path);
242 return CURLE_URL_MALFORMAT;
245 fd = open_readonly(real_path, O_RDONLY);
246 file->path = real_path;
248 file->freepath = real_path; /* free this when done */
251 if(!data->set.upload && (fd == -1)) {
252 failf(data, "Couldn't open file %s", data->state.path);
253 file_done(conn, CURLE_FILE_COULDNT_READ_FILE, FALSE);
254 return CURLE_FILE_COULDNT_READ_FILE;
261 static CURLcode file_done(struct connectdata *conn,
262 CURLcode status, bool premature)
264 struct FILEPROTO *file = conn->data->req.protop;
265 (void)status; /* not used */
266 (void)premature; /* not used */
269 Curl_safefree(file->freepath);
279 static CURLcode file_disconnect(struct connectdata *conn,
280 bool dead_connection)
282 struct FILEPROTO *file = conn->data->req.protop;
283 (void)dead_connection; /* not used */
286 Curl_safefree(file->freepath);
296 #ifdef DOS_FILESYSTEM
302 static CURLcode file_upload(struct connectdata *conn)
304 struct FILEPROTO *file = conn->data->req.protop;
305 const char *dir = strchr(file->path, DIRSEP);
308 CURLcode result = CURLE_OK;
309 struct Curl_easy *data = conn->data;
310 char *buf = data->state.buffer;
313 curl_off_t bytecount = 0;
314 struct timeval now = Curl_tvnow();
315 struct_stat file_stat;
319 * Since FILE: doesn't do the full init, we need to provide some extra
322 conn->data->req.upload_fromhere = buf;
325 return CURLE_FILE_COULDNT_READ_FILE; /* fix: better error code */
328 return CURLE_FILE_COULDNT_READ_FILE; /* fix: better error code */
331 #define MODE_DEFAULT O_WRONLY|O_CREAT|O_BINARY
333 #define MODE_DEFAULT O_WRONLY|O_CREAT
336 if(data->state.resume_from)
337 mode = MODE_DEFAULT|O_APPEND;
339 mode = MODE_DEFAULT|O_TRUNC;
341 fd = open(file->path, mode, conn->data->set.new_file_perms);
343 failf(data, "Can't open %s for writing", file->path);
344 return CURLE_WRITE_ERROR;
347 if(-1 != data->state.infilesize)
348 /* known size of data to "upload" */
349 Curl_pgrsSetUploadSize(data, data->state.infilesize);
351 /* treat the negative resume offset value as the case of "-" */
352 if(data->state.resume_from < 0) {
353 if(fstat(fd, &file_stat)) {
355 failf(data, "Can't get the size of %s", file->path);
356 return CURLE_WRITE_ERROR;
359 data->state.resume_from = (curl_off_t)file_stat.st_size;
364 result = Curl_fillreadbuffer(conn, BUFSIZE, &readcount);
368 if(readcount <= 0) /* fix questionable compare error. curlvms */
371 nread = (size_t)readcount;
373 /*skip bytes before resume point*/
374 if(data->state.resume_from) {
375 if((curl_off_t)nread <= data->state.resume_from) {
376 data->state.resume_from -= nread;
381 buf2 = buf + data->state.resume_from;
382 nread -= (size_t)data->state.resume_from;
383 data->state.resume_from = 0;
389 /* write the data to the target */
390 nwrite = write(fd, buf2, nread);
391 if(nwrite != nread) {
392 result = CURLE_SEND_ERROR;
398 Curl_pgrsSetUploadCounter(data, bytecount);
400 if(Curl_pgrsUpdate(conn))
401 result = CURLE_ABORTED_BY_CALLBACK;
403 result = Curl_speedcheck(data, now);
405 if(!result && Curl_pgrsUpdate(conn))
406 result = CURLE_ABORTED_BY_CALLBACK;
414 * file_do() is the protocol-specific function for the do-phase, separated
415 * from the connect-phase above. Other protocols merely setup the transfer in
416 * the do-phase, to have it done in the main transfer loop but since some
417 * platforms we support don't allow select()ing etc on file handles (as
418 * opposed to sockets) we instead perform the whole do-operation in this
421 static CURLcode file_do(struct connectdata *conn, bool *done)
423 /* This implementation ignores the host name in conformance with
424 RFC 1738. Only local files (reachable via the standard file system)
425 are supported. This means that files on remotely mounted directories
426 (via NFS, Samba, NT sharing) can be accessed through a file:// URL
428 CURLcode result = CURLE_OK;
429 struct_stat statbuf; /* struct_stat instead of struct stat just to allow the
430 Windows version to have a different struct without
431 having to redefine the simple word 'stat' */
432 curl_off_t expected_size=0;
436 struct Curl_easy *data = conn->data;
437 char *buf = data->state.buffer;
438 curl_off_t bytecount = 0;
440 struct timeval now = Curl_tvnow();
441 struct FILEPROTO *file;
443 *done = TRUE; /* unconditionally */
446 Curl_pgrsStartNow(data);
449 return file_upload(conn);
451 file = conn->data->req.protop;
453 /* get the fd from the connection phase */
456 /* VMS: This only works reliable for STREAMLF files */
457 if(-1 != fstat(fd, &statbuf)) {
458 /* we could stat it, then read out the size */
459 expected_size = statbuf.st_size;
460 /* and store the modification time */
461 data->info.filetime = (long)statbuf.st_mtime;
465 if(fstated && !data->state.range && data->set.timecondition) {
466 if(!Curl_meets_timecondition(data, (time_t)data->info.filetime)) {
472 /* If we have selected NOBODY and HEADER, it means that we only want file
473 information. Which for FILE can't be much more than the file size and
475 if(data->set.opt_no_body && data->set.include_header && fstated) {
478 const struct tm *tm = &buffer;
479 snprintf(buf, CURL_BUFSIZE(data->set.buffer_size),
480 "Content-Length: %" CURL_FORMAT_CURL_OFF_T "\r\n", expected_size);
481 result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
485 result = Curl_client_write(conn, CLIENTWRITE_BOTH,
486 (char *)"Accept-ranges: bytes\r\n", 0);
490 filetime = (time_t)statbuf.st_mtime;
491 result = Curl_gmtime(filetime, &buffer);
495 /* format: "Tue, 15 Nov 1994 12:45:26 GMT" */
496 snprintf(buf, BUFSIZE-1,
497 "Last-Modified: %s, %02d %s %4d %02d:%02d:%02d GMT\r\n",
498 Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
500 Curl_month[tm->tm_mon],
505 result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
507 /* set the file size to make it available post transfer */
508 Curl_pgrsSetDownloadSize(data, expected_size);
512 /* Check whether file range has been specified */
515 /* Adjust the start offset in case we want to get the N last bytes
516 * of the stream iff the filesize could be determined */
517 if(data->state.resume_from < 0) {
519 failf(data, "Can't get the size of file.");
520 return CURLE_READ_ERROR;
523 data->state.resume_from += (curl_off_t)statbuf.st_size;
526 if(data->state.resume_from <= expected_size)
527 expected_size -= data->state.resume_from;
529 failf(data, "failed to resume file:// transfer");
530 return CURLE_BAD_DOWNLOAD_RESUME;
533 /* A high water mark has been specified so we obey... */
534 if(data->req.maxdownload > 0)
535 expected_size = data->req.maxdownload;
537 if(!fstated || (expected_size == 0))
542 /* The following is a shortcut implementation of file reading
543 this is both more efficient than the former call to download() and
544 it avoids problems with select() and recv() on file descriptors
547 Curl_pgrsSetDownloadSize(data, expected_size);
549 if(data->state.resume_from) {
550 if(data->state.resume_from !=
551 lseek(fd, data->state.resume_from, SEEK_SET))
552 return CURLE_BAD_DOWNLOAD_RESUME;
555 Curl_pgrsTime(data, TIMER_STARTTRANSFER);
558 /* Don't fill a whole buffer if we want less than all data */
563 (expected_size < CURL_OFF_T_C(BUFSIZE) - CURL_OFF_T_C(1)) ?
564 curlx_sotouz(expected_size) : BUFSIZE - 1;
567 bytestoread = BUFSIZE-1;
569 nread = read(fd, buf, bytestoread);
574 if(nread <= 0 || (size_known && (expected_size == 0)))
579 expected_size -= nread;
581 result = Curl_client_write(conn, CLIENTWRITE_BODY, buf, nread);
585 Curl_pgrsSetDownloadCounter(data, bytecount);
587 if(Curl_pgrsUpdate(conn))
588 result = CURLE_ABORTED_BY_CALLBACK;
590 result = Curl_speedcheck(data, now);
592 if(Curl_pgrsUpdate(conn))
593 result = CURLE_ABORTED_BY_CALLBACK;