1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2015, 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_GOPHER
28 #include <curl/curl.h>
39 #include "curl_memory.h"
40 /* The last #include file should be: */
44 * Forward declarations.
47 static CURLcode gopher_do(struct connectdata *conn, bool *done);
50 * Gopher protocol handler.
51 * This is also a nice simple template to build off for simple
52 * connect-command-download protocols.
55 const struct Curl_handler Curl_handler_gopher = {
56 "GOPHER", /* scheme */
57 ZERO_NULL, /* setup_connection */
58 gopher_do, /* do_it */
60 ZERO_NULL, /* do_more */
61 ZERO_NULL, /* connect_it */
62 ZERO_NULL, /* connecting */
63 ZERO_NULL, /* doing */
64 ZERO_NULL, /* proto_getsock */
65 ZERO_NULL, /* doing_getsock */
66 ZERO_NULL, /* domore_getsock */
67 ZERO_NULL, /* perform_getsock */
68 ZERO_NULL, /* disconnect */
69 ZERO_NULL, /* readwrite */
70 PORT_GOPHER, /* defport */
71 CURLPROTO_GOPHER, /* protocol */
72 PROTOPT_NONE /* flags */
75 static CURLcode gopher_do(struct connectdata *conn, bool *done)
77 CURLcode result=CURLE_OK;
78 struct Curl_easy *data=conn->data;
79 curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
81 curl_off_t *bytecount = &data->req.bytecount;
82 char *path = data->state.path;
88 *done = TRUE; /* unconditionally */
90 /* Create selector. Degenerate cases: / and /1 => convert to "" */
91 if(strlen(path) <= 2) {
93 len = (int)strlen(sel);
99 /* Otherwise, drop / and the first character (i.e., item type) ... */
103 /* ... then turn ? into TAB for search servers, Veronica, etc. ... */
109 /* ... and finally unescape */
110 sel = curl_easy_unescape(data, newp, 0, &len);
112 return CURLE_OUT_OF_MEMORY;
116 /* We use Curl_write instead of Curl_sendf to make sure the entire buffer is
117 sent, which could be sizeable with long selectors. */
118 k = curlx_uztosz(len);
121 result = Curl_write(conn, sockfd, sel, k, &amount);
122 if(!result) { /* Which may not have written it all! */
123 result = Curl_client_write(conn, CLIENTWRITE_HEADER, sel, amount);
131 break; /* but it did write it all */
134 failf(data, "Failed sending Gopher request");
138 /* Don't busyloop. The entire loop thing is a work-around as it causes a
139 BLOCKING behavior which is a NO-NO. This function should rather be
140 split up in a do and a doing piece where the pieces that aren't
141 possible to send now will be sent in the doing function repeatedly
142 until the entire request is sent.
144 Wait a while for the socket to be writable. Note that this doesn't
145 acknowledge the timeout.
147 Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100);
152 /* We can use Curl_sendf to send the terminal \r\n relatively safely and
153 save allocing another string/doing another _write loop. */
154 result = Curl_sendf(sockfd, conn, "\r\n");
156 failf(data, "Failed sending Gopher request");
159 result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2);
163 Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount,
164 -1, NULL); /* no upload */
167 #endif /*CURL_DISABLE_GOPHER*/