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
|
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef HTTPFETCH_HEADER
#define HTTPFETCH_HEADER
#include <vector>
#include "util/string.h"
#include "config.h"
// Can be used in place of "caller" in asynchronous transfers to discard result
// (used as default value of "caller")
#define HTTPFETCH_DISCARD 0
#define HTTPFETCH_SYNC 1
struct HTTPFetchRequest
{
std::string url;
// Identifies the caller (for asynchronous requests)
// Ignored by httpfetch_sync
unsigned long caller;
// Some number that identifies the request
// (when the same caller issues multiple httpfetch_async calls)
unsigned long request_id;
// Timeout for the whole transfer, in milliseconds
long timeout;
// Timeout for the connection phase, in milliseconds
long connect_timeout;
// Indicates if this is multipart/form-data or
// application/x-www-form-urlencoded. POST-only.
bool multipart;
// POST fields. Fields are escaped properly.
// If this is empty a GET request is done instead.
StringMap post_fields;
// Raw POST data, overrides post_fields.
std::string post_data;
// If not empty, should contain entries such as "Accept: text/html"
std::vector<std::string> extra_headers;
//useragent to use
std::string useragent;
HTTPFetchRequest();
};
struct HTTPFetchResult
{
bool succeeded;
bool timeout;
long response_code;
std::string data;
// The caller and request_id from the corresponding HTTPFetchRequest.
unsigned long caller;
unsigned long request_id;
HTTPFetchResult() :
succeeded(false),
timeout(false),
response_code(0),
data(""),
caller(HTTPFETCH_DISCARD),
request_id(0)
{}
HTTPFetchResult(const HTTPFetchRequest &fetch_request) :
succeeded(false),
timeout(false),
response_code(0),
data(""),
caller(fetch_request.caller),
request_id(fetch_request.request_id)
{}
};
// Initializes the httpfetch module
void httpfetch_init(int parallel_limit);
// Stops the httpfetch thread and cleans up resources
void httpfetch_cleanup();
// Starts an asynchronous HTTP fetch request
void httpfetch_async(const HTTPFetchRequest &fetch_request);
// If any fetch for the given caller ID is complete, removes it from the
// result queue, sets the fetch result and returns true. Otherwise returns false.
bool httpfetch_async_get(unsigned long caller, HTTPFetchResult &fetch_result);
// Allocates a caller ID for httpfetch_async
// Not required if you want to set caller = HTTPFETCH_DISCARD
unsigned long httpfetch_caller_alloc();
// Allocates a non-predictable caller ID for httpfetch_async
unsigned long httpfetch_caller_alloc_secure();
// Frees a caller ID allocated with httpfetch_caller_alloc
// Note: This can be expensive, because the httpfetch thread is told
// to stop any ongoing fetches for the given caller.
void httpfetch_caller_free(unsigned long caller);
// Performs a synchronous HTTP request. This blocks and therefore should
// only be used from background threads.
void httpfetch_sync(const HTTPFetchRequest &fetch_request,
HTTPFetchResult &fetch_result);
#endif // !HTTPFETCH_HEADER
|
