1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* -*- Mode: c; c-basic-offset: 2 -*-
*
* raptor_www_curl.c - Raptor WWW retrieval via libcurl
*
* Copyright (C) 2003-2008, David Beckett http://purl.org/net/dajobe/
* Copyright (C) 2003-2004, University of Bristol, UK http://www.bristol.ac.uk/
*
* This package is Free Software and part of Redland http://librdf.org/
*
* It is licensed under the following three licenses as alternatives:
* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE.html or LICENSE.txt at the top of this package for the
* complete terms and further detail along with the license texts for
* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
*
*
*/
#ifdef HAVE_CONFIG_H
#include <raptor_config.h>
#endif
#ifdef WIN32
#include <win32_raptor_config.h>
#endif
#ifdef RAPTOR_WWW_LIBCURL
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
/* Raptor includes */
#include "raptor.h"
#include "raptor_internal.h"
static void
raptor_www_curl_update_status(raptor_www* www)
{
char* final_uri;
if(www->failed)
return;
if(www->checked_status++)
return;
if(curl_easy_getinfo(www->curl_handle, CURLINFO_EFFECTIVE_URL,
&final_uri) == CURLE_OK) {
www->final_uri=raptor_new_uri((const unsigned char*)final_uri);
if(www->final_uri_handler)
www->final_uri_handler(www, www->final_uri_userdata, www->final_uri);
}
}
static size_t
raptor_www_curl_write_callback(void *ptr, size_t size, size_t nmemb, void *userdata)
{
raptor_www* www=(raptor_www*)userdata;
int bytes=size*nmemb;
/* If WWW has been aborted, return nothing so that
* libcurl will abort the transfer
*/
if(www->failed)
return 0;
raptor_www_curl_update_status(www);
#if RAPTOR_DEBUG > 2
RAPTOR_DEBUG2("Got %d bytes\n", bytes);
#endif
if(www->write_bytes)
www->write_bytes(www, www->write_bytes_userdata, ptr, size, nmemb);
www->total_bytes += bytes;
return bytes;
}
static size_t
raptor_www_curl_header_callback(void* ptr, size_t size, size_t nmemb,
void *userdata)
{
raptor_www* www=(raptor_www*)userdata;
int bytes=size*nmemb;
/* If WWW has been aborted, return nothing so that
* libcurl will abort the transfer
*/
if(www->failed)
return 0;
if(!strncmp((char*)ptr, "Content-Type: ", 14)) {
int len=bytes-16;
char *type_buffer=(char*)RAPTOR_MALLOC(cstring, len+1);
strncpy(type_buffer, (char*)ptr+14, len);
type_buffer[len]='\0';
if(www->type)
RAPTOR_FREE(cstring, www->type);
www->type=type_buffer;
www->free_type=1;
#if RAPTOR_DEBUG > 2
RAPTOR_DEBUG3("Got content type '%s' (%d bytes)\n", type_buffer, len);
#endif
if(www->content_type)
www->content_type(www, www->content_type_userdata, www->type);
}
return bytes;
}
void
raptor_www_curl_init(raptor_www *www)
{
if(!www->curl_handle) {
www->curl_handle=curl_easy_init();
www->curl_init_here=1;
}
#ifndef CURLOPT_WRITEDATA
#define CURLOPT_WRITEDATA CURLOPT_FILE
#endif
/* send all data to this function */
curl_easy_setopt(www->curl_handle, CURLOPT_WRITEFUNCTION,
raptor_www_curl_write_callback);
/* ... using this data pointer */
curl_easy_setopt(www->curl_handle, CURLOPT_WRITEDATA, www);
/* send all headers to this function */
curl_easy_setopt(www->curl_handle, CURLOPT_HEADERFUNCTION,
raptor_www_curl_header_callback);
/* ... using this data pointer */
curl_easy_setopt(www->curl_handle, CURLOPT_WRITEHEADER, www);
/* Make it follow Location: headers */
curl_easy_setopt(www->curl_handle, CURLOPT_FOLLOWLOCATION, 1);
#if RAPTOR_DEBUG > 2
curl_easy_setopt(www->curl_handle, CURLOPT_VERBOSE, (void*)1);
#endif
curl_easy_setopt(www->curl_handle, CURLOPT_ERRORBUFFER, www->error_buffer);
/* Connection timeout in seconds */
curl_easy_setopt(www->curl_handle, CURLOPT_CONNECTTIMEOUT,
www->connection_timeout);
curl_easy_setopt(www->curl_handle, CURLOPT_NOSIGNAL, 1);
}
void
raptor_www_curl_free(raptor_www *www)
{
/* only tidy up if we did all the work */
if(www->curl_init_here && www->curl_handle) {
curl_easy_cleanup(www->curl_handle);
www->curl_handle=NULL;
}
}
int
raptor_www_curl_fetch(raptor_www *www)
{
struct curl_slist *slist=NULL;
if(www->proxy)
curl_easy_setopt(www->curl_handle, CURLOPT_PROXY, www->proxy);
if(www->user_agent)
curl_easy_setopt(www->curl_handle, CURLOPT_USERAGENT, www->user_agent);
if(www->http_accept)
slist=curl_slist_append(slist, (const char*)www->http_accept);
/* ALWAYS disable curl default "Pragma: no-cache" */
slist=curl_slist_append(slist, "Pragma:");
if(www->cache_control)
slist=curl_slist_append(slist, (const char*)www->cache_control);
if(slist)
curl_easy_setopt(www->curl_handle, CURLOPT_HTTPHEADER, slist);
/* specify URL to get */
curl_easy_setopt(www->curl_handle, CURLOPT_URL,
raptor_uri_as_string(www->uri));
if(curl_easy_perform(www->curl_handle)) {
/* failed */
www->failed=1;
raptor_www_error(www, "Resolving URI failed: %s", www->error_buffer);
} else {
long lstatus;
#ifndef CURLINFO_RESPONSE_CODE
#define CURLINFO_RESPONSE_CODE CURLINFO_HTTP_CODE
#endif
/* Requires pointer to a long */
if(curl_easy_getinfo(www->curl_handle, CURLINFO_RESPONSE_CODE, &lstatus) == CURLE_OK)
www->status_code=lstatus;
}
if(slist)
curl_slist_free_all(slist);
return www->failed;
}
#endif /* RAPTOR_WWW_LIBCURL */
|
