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
228
229
230
231
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
#include <LibCore/Gzip.h>
#include <LibCore/TCPSocket.h>
#include <LibHTTP/HttpJob.h>
#include <LibHTTP/HttpResponse.h>
#include <stdio.h>
#include <unistd.h>
//#define HTTPJOB_DEBUG
namespace HTTP {
static ByteBuffer handle_content_encoding(const ByteBuffer& buf, const String& content_encoding)
{
#ifdef CHTTPJOB_DEBUG
dbg() << "HttpJob::handle_content_encoding: buf has content_encoding = " << content_encoding;
#endif
if (content_encoding == "gzip") {
if (!Core::Gzip::is_compressed(buf)) {
dbg() << "HttpJob::handle_content_encoding: buf is not gzip compressed!";
}
#ifdef CHTTPJOB_DEBUG
dbg() << "HttpJob::handle_content_encoding: buf is gzip compressed!";
#endif
auto uncompressed = Core::Gzip::decompress(buf);
if (!uncompressed.has_value()) {
dbg() << "HttpJob::handle_content_encoding: Gzip::decompress() failed. Returning original buffer.";
return buf;
}
#ifdef CHTTPJOB_DEBUG
dbg() << "HttpJob::handle_content_encoding: Gzip::decompress() successful.\n"
<< " Input size = " << buf.size() << "\n"
<< " Output size = " << uncompressed.value().size();
#endif
return uncompressed.value();
}
return buf;
}
HttpJob::HttpJob(const HttpRequest& request)
: m_request(request)
{
}
HttpJob::~HttpJob()
{
}
void HttpJob::on_socket_connected()
{
auto raw_request = m_request.to_raw_request();
#if 0
dbg() << "HttpJob: raw_request:";
dbg() << String::copy(raw_request).characters();
#endif
bool success = m_socket->send(raw_request);
if (!success)
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::TransmissionFailed); });
m_socket->on_ready_to_read = [&] {
if (is_cancelled())
return;
if (m_state == State::InStatus) {
if (!m_socket->can_read_line())
return;
auto line = m_socket->read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "HttpJob: Expected HTTP status\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::TransmissionFailed); });
}
auto parts = String::copy(line, Chomp).split(' ');
if (parts.size() < 3) {
fprintf(stderr, "HttpJob: Expected 3-part HTTP status, got '%s'\n", line.data());
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
bool ok;
m_code = parts[1].to_uint(ok);
if (!ok) {
fprintf(stderr, "HttpJob: Expected numeric HTTP status\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
m_state = State::InHeaders;
return;
}
if (m_state == State::InHeaders) {
if (!m_socket->can_read_line())
return;
auto line = m_socket->read_line(PAGE_SIZE);
if (line.is_null()) {
fprintf(stderr, "HttpJob: Expected HTTP header\n");
return did_fail(Core::NetworkJob::Error::ProtocolFailed);
}
auto chomped_line = String::copy(line, Chomp);
if (chomped_line.is_empty()) {
m_state = State::InBody;
return;
}
auto parts = chomped_line.split(':');
if (parts.is_empty()) {
fprintf(stderr, "HttpJob: Expected HTTP header with key/value\n");
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
auto name = parts[0];
if (chomped_line.length() < name.length() + 2) {
fprintf(stderr, "HttpJob: Malformed HTTP header: '%s' (%zu)\n", chomped_line.characters(), chomped_line.length());
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
auto value = chomped_line.substring(name.length() + 2, chomped_line.length() - name.length() - 2);
m_headers.set(name, value);
#ifdef CHTTPJOB_DEBUG
dbg() << "HttpJob: [" << name << "] = '" << value << "'";
#endif
return;
}
ASSERT(m_state == State::InBody);
ASSERT(m_socket->can_read());
auto payload = m_socket->receive(64 * KB);
if (!payload) {
if (m_socket->eof())
return finish_up();
return deferred_invoke([this](auto&) { did_fail(Core::NetworkJob::Error::ProtocolFailed); });
}
m_received_buffers.append(payload);
m_received_size += payload.size();
auto content_length_header = m_headers.get("Content-Length");
Optional<u32> content_length {};
if (content_length_header.has_value()) {
bool ok;
auto length = content_length_header.value().to_uint(ok);
if (ok)
content_length = length;
}
deferred_invoke([this, content_length](auto&) {
did_progress(content_length, m_received_size);
});
if (content_length.has_value()) {
auto length = content_length.value();
if (m_received_size >= length) {
m_received_size = length;
finish_up();
}
}
};
}
void HttpJob::finish_up()
{
m_state = State::Finished;
auto flattened_buffer = ByteBuffer::create_uninitialized(m_received_size);
u8* flat_ptr = flattened_buffer.data();
for (auto& received_buffer : m_received_buffers) {
memcpy(flat_ptr, received_buffer.data(), received_buffer.size());
flat_ptr += received_buffer.size();
}
m_received_buffers.clear();
auto content_encoding = m_headers.get("Content-Encoding");
if (content_encoding.has_value()) {
flattened_buffer = handle_content_encoding(flattened_buffer, content_encoding.value());
}
auto response = HttpResponse::create(m_code, move(m_headers), move(flattened_buffer));
deferred_invoke([this, response](auto&) {
did_finish(move(response));
});
}
void HttpJob::start()
{
ASSERT(!m_socket);
m_socket = Core::TCPSocket::construct(this);
m_socket->on_connected = [this] {
#ifdef CHTTPJOB_DEBUG
dbg() << "HttpJob: on_connected callback";
#endif
on_socket_connected();
};
bool success = m_socket->connect(m_request.url().host(), m_request.url().port());
if (!success) {
deferred_invoke([this](auto&) {
return did_fail(Core::NetworkJob::Error::ConnectionFailed);
});
}
}
void HttpJob::shutdown()
{
if (!m_socket)
return;
m_socket->on_ready_to_read = nullptr;
m_socket->on_connected = nullptr;
remove_child(*m_socket);
m_socket = nullptr;
}
}
|
