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
|
/*
* Copyright (c) 2014, Peter Thorson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the WebSocket++ Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef HTTP_PARSER_IMPL_HPP
#define HTTP_PARSER_IMPL_HPP
#include <algorithm>
#include <cstdlib>
#include <istream>
#include <sstream>
#include <string>
namespace websocketpp {
namespace http {
namespace parser {
inline void parser::set_version(std::string const & version) {
m_version = version;
}
inline std::string const & parser::get_header(std::string const & key) const {
header_list::const_iterator h = m_headers.find(key);
if (h == m_headers.end()) {
return empty_header;
} else {
return h->second;
}
}
inline bool parser::get_header_as_plist(std::string const & key,
parameter_list & out) const
{
header_list::const_iterator it = m_headers.find(key);
if (it == m_headers.end() || it->second.size() == 0) {
return false;
}
return this->parse_parameter_list(it->second,out);
}
inline void parser::append_header(std::string const & key, std::string const &
val)
{
if (std::find_if(key.begin(),key.end(),is_not_token_char) != key.end()) {
throw exception("Invalid header name",status_code::bad_request);
}
if (this->get_header(key).empty()) {
m_headers[key] = val;
} else {
m_headers[key] += ", " + val;
}
}
inline void parser::replace_header(std::string const & key, std::string const &
val)
{
m_headers[key] = val;
}
inline void parser::remove_header(std::string const & key) {
m_headers.erase(key);
}
inline void parser::set_body(std::string const & value) {
if (value.size() == 0) {
remove_header("Content-Length");
m_body.clear();
return;
}
// TODO: should this method respect the max size? If so how should errors
// be indicated?
std::stringstream len;
len << value.size();
replace_header("Content-Length", len.str());
m_body = value;
}
inline bool parser::parse_parameter_list(std::string const & in,
parameter_list & out) const
{
if (in.size() == 0) {
return false;
}
std::string::const_iterator it;
it = extract_parameters(in.begin(),in.end(),out);
return (it == in.begin());
}
inline bool parser::prepare_body() {
if (!get_header("Content-Length").empty()) {
std::string const & cl_header = get_header("Content-Length");
char * end;
// TODO: not 100% sure what the compatibility of this method is. Also,
// I believe this will only work up to 32bit sizes. Is there a need for
// > 4GiB HTTP payloads?
m_body_bytes_needed = std::strtoul(cl_header.c_str(),&end,10);
if (m_body_bytes_needed > m_body_bytes_max) {
throw exception("HTTP message body too large",
status_code::request_entity_too_large);
}
m_body_encoding = body_encoding::plain;
return true;
} else if (get_header("Transfer-Encoding") == "chunked") {
// TODO
//m_body_encoding = body_encoding::chunked;
return false;
} else {
return false;
}
}
inline size_t parser::process_body(char const * buf, size_t len) {
if (m_body_encoding == body_encoding::plain) {
size_t processed = (std::min)(m_body_bytes_needed,len);
m_body.append(buf,processed);
m_body_bytes_needed -= processed;
return processed;
} else if (m_body_encoding == body_encoding::chunked) {
// TODO:
throw exception("Unexpected body encoding",
status_code::internal_server_error);
} else {
throw exception("Unexpected body encoding",
status_code::internal_server_error);
}
}
inline void parser::process_header(std::string::iterator begin,
std::string::iterator end)
{
std::string::iterator cursor = std::search(
begin,
end,
header_separator,
header_separator + sizeof(header_separator) - 1
);
if (cursor == end) {
throw exception("Invalid header line",status_code::bad_request);
}
append_header(strip_lws(std::string(begin,cursor)),
strip_lws(std::string(cursor+sizeof(header_separator)-1,end)));
}
inline std::string parser::raw_headers() const {
std::stringstream raw;
header_list::const_iterator it;
for (it = m_headers.begin(); it != m_headers.end(); it++) {
raw << it->first << ": " << it->second << "\r\n";
}
return raw.str();
}
} // namespace parser
} // namespace http
} // namespace websocketpp
#endif // HTTP_PARSER_IMPL_HPP
|
