source: UsbWattMeter/trunk/curl-7.47.1/lib/gopher.c@ 167

Last change on this file since 167 was 167, checked in by coas-nagasima, 6 years ago

MIMEにSJISを設定

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-csrc; charset=SHIFT_JIS
File size: 5.2 KB
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[164]1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
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.
13 *
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.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23#include "curl_setup.h"
24
25#ifndef CURL_DISABLE_GOPHER
26
27#include "urldata.h"
28#include <curl/curl.h>
29#include "transfer.h"
30#include "sendf.h"
31
32#include "progress.h"
33#include "strequal.h"
34#include "gopher.h"
35#include "rawstr.h"
36#include "select.h"
37#include "url.h"
38#include "warnless.h"
39#include "curl_memory.h"
40/* The last #include file should be: */
41#include "memdebug.h"
42
43/*
44 * Forward declarations.
45 */
46
47static CURLcode gopher_do(struct connectdata *conn, bool *done);
48
49/*
50 * Gopher protocol handler.
51 * This is also a nice simple template to build off for simple
52 * connect-command-download protocols.
53 */
54
55const struct Curl_handler Curl_handler_gopher = {
56 "GOPHER", /* scheme */
57 ZERO_NULL, /* setup_connection */
58 gopher_do, /* do_it */
59 ZERO_NULL, /* done */
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 */
73};
74
75static CURLcode gopher_do(struct connectdata *conn, bool *done)
76{
77 CURLcode result=CURLE_OK;
78 struct SessionHandle *data=conn->data;
79 curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
80
81 curl_off_t *bytecount = &data->req.bytecount;
82 char *path = data->state.path;
83 char *sel;
84 char *sel_org = NULL;
85 ssize_t amount, k;
86 int len;
87
88 *done = TRUE; /* unconditionally */
89
90 /* Create selector. Degenerate cases: / and /1 => convert to "" */
91 if(strlen(path) <= 2) {
92 sel = (char *)"";
93 len = (int)strlen(sel);
94 }
95 else {
96 char *newp;
97 size_t j, i;
98
99 /* Otherwise, drop / and the first character (i.e., item type) ... */
100 newp = path;
101 newp+=2;
102
103 /* ... then turn ? into TAB for search servers, Veronica, etc. ... */
104 j = strlen(newp);
105 for(i=0; i<j; i++)
106 if(newp[i] == '?')
107 newp[i] = '\x09';
108
109 /* ... and finally unescape */
110 sel = curl_easy_unescape(data, newp, 0, &len);
111 if(!sel)
112 return CURLE_OUT_OF_MEMORY;
113 sel_org = sel;
114 }
115
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);
119
120 for(;;) {
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);
124 if(result) {
125 free(sel_org);
126 return result;
127 }
128 k -= amount;
129 sel += amount;
130 if(k < 1)
131 break; /* but it did write it all */
132 }
133 else {
134 failf(data, "Failed sending Gopher request");
135 free(sel_org);
136 return result;
137 }
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.
143
144 Wait a while for the socket to be writable. Note that this doesn't
145 acknowledge the timeout.
146 */
147 Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100);
148 }
149
150 free(sel_org);
151
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");
155 if(result) {
156 failf(data, "Failed sending Gopher request");
157 return result;
158 }
159 result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2);
160 if(result)
161 return result;
162
163 Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount,
164 -1, NULL); /* no upload */
165 return CURLE_OK;
166}
167#endif /*CURL_DISABLE_GOPHER*/
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