1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, 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 ***************************************************************************/
23 #include "curl_setup.h"
25 #ifndef CURL_DISABLE_GOPHER
28 #include <curl/curl.h>
40 #define _MPRINTF_REPLACE /* use our functions only */
41 #include <curl/mprintf.h>
43 #include "curl_memory.h"
44 /* The last #include file should be: */
48 * Forward declarations.
51 static CURLcode gopher_do(struct connectdata *conn, bool *done);
54 * Gopher protocol handler.
55 * This is also a nice simple template to build off for simple
56 * connect-command-download protocols.
59 const struct Curl_handler Curl_handler_gopher = {
60 "GOPHER", /* scheme */
61 ZERO_NULL, /* setup_connection */
62 gopher_do, /* do_it */
64 ZERO_NULL, /* do_more */
65 ZERO_NULL, /* connect_it */
66 ZERO_NULL, /* connecting */
67 ZERO_NULL, /* doing */
68 ZERO_NULL, /* proto_getsock */
69 ZERO_NULL, /* doing_getsock */
70 ZERO_NULL, /* domore_getsock */
71 ZERO_NULL, /* perform_getsock */
72 ZERO_NULL, /* disconnect */
73 ZERO_NULL, /* readwrite */
74 PORT_GOPHER, /* defport */
75 CURLPROTO_GOPHER, /* protocol */
76 PROTOPT_NONE /* flags */
79 static CURLcode gopher_do(struct connectdata *conn, bool *done)
81 CURLcode result=CURLE_OK;
82 struct SessionHandle *data=conn->data;
83 curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
85 curl_off_t *bytecount = &data->req.bytecount;
86 char *path = data->state.path;
91 *done = TRUE; /* unconditionally */
93 /* Create selector. Degenerate cases: / and /1 => convert to "" */
101 /* Otherwise, drop / and the first character (i.e., item type) ... */
105 /* ... then turn ? into TAB for search servers, Veronica, etc. ... */
111 /* ... and finally unescape */
112 sel = curl_easy_unescape(data, newp, 0, &len);
114 return CURLE_OUT_OF_MEMORY;
118 /* We use Curl_write instead of Curl_sendf to make sure the entire buffer is
119 sent, which could be sizeable with long selectors. */
120 k = curlx_uztosz(strlen(sel));
123 result = Curl_write(conn, sockfd, sel, k, &amount);
124 if(CURLE_OK == result) { /* Which may not have written it all! */
125 result = Curl_client_write(conn, CLIENTWRITE_HEADER, sel, amount);
127 Curl_safefree(sel_org);
133 break; /* but it did write it all */
136 failf(data, "Failed sending Gopher request");
137 Curl_safefree(sel_org);
140 /* Don't busyloop. The entire loop thing is a work-around as it causes a
141 BLOCKING behavior which is a NO-NO. This function should rather be
142 split up in a do and a doing piece where the pieces that aren't
143 possible to send now will be sent in the doing function repeatedly
144 until the entire request is sent.
146 Wait a while for the socket to be writable. Note that this doesn't
147 acknowledge the timeout.
149 Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100);
152 Curl_safefree(sel_org);
154 /* We can use Curl_sendf to send the terminal \r\n relatively safely and
155 save allocing another string/doing another _write loop. */
156 result = Curl_sendf(sockfd, conn, "\r\n");
157 if(result != CURLE_OK) {
158 failf(data, "Failed sending Gopher request");
161 result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2);
165 Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount,
166 -1, NULL); /* no upload */
169 #endif /*CURL_DISABLE_GOPHER*/