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
|
/*
* Copyright (c) 2017-2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/transport/errors/errors.h>
#include <hicn/transport/http/response.h>
#include <experimental/algorithm>
#include <experimental/functional>
#include <cstring>
namespace transport {
namespace http {
HTTPResponse::HTTPResponse() {}
HTTPResponse::HTTPResponse(std::unique_ptr<utils::MemBuf> &&response) {
parse(std::move(response));
}
void HTTPResponse::appendResponseChunk(
std::unique_ptr<utils::MemBuf> &&response_chunk) {
if (headers_.empty()) {
parse(std::move(response_chunk));
} else {
payload_->prependChain(std::move(response_chunk));
}
}
bool HTTPResponse::parseHeaders(std::unique_ptr<utils::MemBuf> &&buffer) {
const char *crlf2 = "\r\n\r\n";
const char *begin = (const char *)buffer->data();
const char *end = begin + buffer->length();
auto it =
std::experimental::search(begin, end,
std::experimental::make_boyer_moore_searcher(
crlf2, crlf2 + strlen(crlf2)));
if (it != end) {
buffer->trimStart(it + strlen(crlf2) - begin);
std::stringstream ss;
ss.str(std::string(begin, it));
std::string line;
getline(ss, line);
std::istringstream line_s(line);
std::string _http_version;
std::string http_version;
line_s >> _http_version;
std::size_t separator;
if ((separator = _http_version.find('/')) != std::string::npos) {
if (_http_version.substr(0, separator) != "HTTP") {
return false;
}
http_version_ =
line.substr(separator + 1, _http_version.length() - separator - 1);
} else {
return false;
}
std::string status_code, status_string;
line_s >> status_code_;
line_s >> status_string;
auto _it = std::search(line.begin(), line.end(), status_string.begin(),
status_string.end());
status_string_ = std::string(_it, line.end() - 1);
std::size_t param_end;
std::size_t value_start;
while (getline(ss, line)) {
if ((param_end = line.find(':')) != std::string::npos) {
value_start = param_end + 1;
if ((value_start) < line.size()) {
if (line[value_start] == ' ') {
value_start++;
}
if (value_start < line.size()) {
headers_[line.substr(0, param_end)] =
line.substr(value_start, line.size() - value_start - 1);
}
}
} else {
return false;
}
}
}
payload_ = std::move(buffer);
return true;
}
void HTTPResponse::parse(std::unique_ptr<utils::MemBuf> &&response) {
if (!parseHeaders(std::move(response))) {
throw errors::RuntimeException("Malformed HTTP response");
}
}
const std::string &HTTPResponse::getStatusCode() const { return status_code_; }
const std::string &HTTPResponse::getStatusString() const {
return status_string_;
}
} // namespace http
} // namespace transport
|