-
Notifications
You must be signed in to change notification settings - Fork 390
/
http_session.cc
318 lines (284 loc) · 9.88 KB
/
http_session.cc
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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include "http/http_session.h"
#include <map>
#include <boost/bind.hpp>
#include <cstdio>
#include "base/logging.h"
#include "base/task.h"
#include "http/http_request.h"
#include "http/http_server.h"
#include "http_parser/http_parser.h"
#include "sandesh/sandesh_types.h"
#include "sandesh/sandesh.h"
#include "sandesh/sandesh_http.h"
#include "http/http_log_types.h"
using namespace std;
int HttpSession::req_handler_task_id_ = -1;
HttpSession::map_type * HttpSession::context_map_ = 0;
tbb::mutex HttpSession::map_mutex_;
tbb::atomic<long> HttpSession::task_count_;
// Input processing context
class HttpSession::RequestBuilder {
public:
RequestBuilder() : complete_(false) {
parser_.data = this;
Clear();
}
void Clear() {
http_parser_init(&parser_, HTTP_REQUEST);
request_.reset(new HttpRequest());
complete_ = false;
header_key_.clear();
header_value_.clear();
}
size_t Parse(const u_int8_t *data, size_t datalen) {
size_t nparsed =
http_parser_execute(&parser_, &settings_,
reinterpret_cast<const char *>(data), datalen);
return nparsed;
}
bool complete() const { return complete_; }
// Transfers ownership
HttpRequest *GetRequest() {
HttpRequest *request = request_.get();
request_.release();
return request;
}
private:
static int OnMessageBegin(struct http_parser *parser) {
return 0;
}
static int OnHeadersComplete(struct http_parser *parser) {
RequestBuilder *builder =
reinterpret_cast<RequestBuilder *>(parser->data);
builder->request_->SetMethod(static_cast<http_method>(parser->method));
builder->request_->SetUrl(&builder->tmp_url_);
builder->PushHeader();
return 0;
}
static int OnMessageComplete(struct http_parser *parser) {
RequestBuilder *builder =
reinterpret_cast<RequestBuilder *>(parser->data);
builder->complete_ = true;
return 0;
}
static int OnUrl(struct http_parser *parser,
const char *loc, size_t length) {
RequestBuilder *builder =
reinterpret_cast<RequestBuilder *>(parser->data);
builder->tmp_url_.append(loc, length);
return 0;
}
static int OnStatusComplete(struct http_parser *parser) {
return 0;
}
static int OnHeaderField(struct http_parser *parser,
const char *loc, size_t length) {
RequestBuilder *builder =
reinterpret_cast<RequestBuilder *>(parser->data);
if (!builder->header_value_.empty()) {
builder->PushHeader();
}
builder->header_key_.append(loc, length);
return 0;
}
static int OnHeaderValue(struct http_parser *parser,
const char *loc, size_t length) {
RequestBuilder *builder =
reinterpret_cast<RequestBuilder *>(parser->data);
builder->header_value_.append(loc, length);
return 0;
}
static int OnBody(struct http_parser *parser,
const char *loc, size_t length) {
RequestBuilder *builder =
reinterpret_cast<RequestBuilder *>(parser->data);
builder->request_->SetBody(loc, length);
return 0;
}
void PushHeader() {
request_->PushHeader(header_key_, header_value_);
header_key_.clear();
header_value_.clear();
}
static struct http_parser_settings settings_;
struct http_parser parser_;
std::auto_ptr<HttpRequest> request_;
bool complete_;
string tmp_url_; // temporary: used while parsing
string header_key_;
string header_value_;
};
struct http_parser_settings HttpSession::RequestBuilder::settings_ = {
OnMessageBegin,
OnUrl,
OnStatusComplete,
OnHeaderField,
OnHeaderValue,
OnHeadersComplete,
OnBody,
OnMessageComplete
};
class HttpSession::RequestHandler : public Task {
public:
explicit RequestHandler(HttpSession *session)
: Task(req_handler_task_id_, session->GetSessionInstance()),
session_(session) {
}
~RequestHandler() {
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO, "RequestHandler destructor");
}
void NotFound(HttpSession *session, const HttpRequest *request) {
static const char no_response[] =
"HTTP/1.1 404 Not Found\r\n"
"Content-Type: text/html; charset=UTF-8\r\n"
"Content-Length: 46\r\n"
"\r\n"
"<html>\n"
"<title>404 Not Found</title>\n"
"</html>\r\n"
;
session->Send(reinterpret_cast<const u_int8_t *>(no_response),
sizeof(no_response), NULL);
delete request;
}
// Retrieve a request item from the queue. Return true if the queue
// is empty.
bool FromQ(HttpRequest *& r) {
return !session_->request_queue_.try_pop(r);
}
virtual bool Run() {
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO,
"RequestHandler execute");
HttpRequest *request = NULL;
bool del_session = false;
HttpServer *server = static_cast<HttpServer *>(session_->server());
while (true) {
request = NULL;
session_->req_queue_empty_ = FromQ(request);
if (!request) break;
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO,
"URL is " + request->ToString());
if (request->ToString().empty()) {
if (session_->event_cb_ && !session_->event_cb_.empty()) {
session_->event_cb_(session_.get(), request->Event());
}
del_session = true;
session_->set_observer(NULL);
session_->Close();
delete request;
} else {
HttpServer::HttpHandlerFn handler =
server->GetHandler(request->UrlPath());
if (handler == NULL) {
handler = boost::bind(&RequestHandler::NotFound,
this, _1, _2);
}
handler(session_.get(), request);
}
}
if (del_session) {
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO, "DeleteSession "
+ session_->ToString());
session_->set_observer(NULL);
server->DeleteSession(session_.get());
}
HttpSession::task_count_--;
return true;
}
std::string Description() const { return "HttpSession::RequestHandler"; }
private:
HttpSessionPtr session_;
};
HttpSession::HttpSession(HttpServer *server, Socket *socket)
: TcpSession(server, socket), event_cb_(NULL) {
if (req_handler_task_id_ == -1) {
TaskScheduler *scheduler = TaskScheduler::GetInstance();
req_handler_task_id_ = scheduler->GetTaskId("http::RequestHandlerTask");
}
req_queue_empty_ = true;
set_observer(boost::bind(&HttpSession::OnSessionEvent, this, _1, _2));
}
HttpSession::~HttpSession() {
HttpRequest *request = NULL;
while (request_queue_.try_pop(request)) {
delete request;
}
}
void HttpSession::AcceptSession() {
tbb::mutex::scoped_lock lock(map_mutex_);
context_str_ = "http%" + ToString();
GetMap()->insert(std::make_pair(context_str_, HttpSessionPtr(this)));
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO,
"Created Session " + context_str_);
}
void HttpSession::RegisterEventCb(SessionEventCb cb) {
event_cb_ = cb;
}
void HttpSession::OnSessionEvent(TcpSession *session,
enum TcpSession::Event event) {
HttpSession *h_session = dynamic_cast<HttpSession *>(session);
assert(h_session);
switch (event) {
case TcpSession::CLOSE:
{
tbb::mutex::scoped_lock lock(map_mutex_);
if (GetMap()->erase(h_session->context_str_)) {
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO,
"Removed Session " + h_session->context_str_);
} else {
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_INFO,
"Not Removed Session " + h_session->context_str_);
}
lock.release();
h_session->context_str_ = "";
HttpRequest *request = new HttpRequest();
string nourl = "";
request->SetUrl(&nourl);
request->SetEvent(event);
request_queue_.push(request);
// Enqueue new RequestHandler task if needed
if (req_queue_empty_) {
TaskScheduler *scheduler = TaskScheduler::GetInstance();
RequestHandler *task = new RequestHandler(this);
HttpSession::task_count_++;
scheduler->Enqueue(task);
}
}
break;
default:
break;
}
}
void HttpSession::OnRead(Buffer buffer) {
const u_int8_t *data = BufferData(buffer);
size_t size = BufferSize(buffer);
std::stringstream msg;
msg << "HttpSession::Read " << size << " bytes";
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_DEBUG, msg.str());
if (context_str_.size() == 0) {
ReleaseBuffer(buffer);
return;
}
if (request_builder_.get() == NULL) {
request_builder_.reset(new RequestBuilder());
}
request_builder_->Parse(data, size);
if (request_builder_->complete()) {
HttpRequest *request = request_builder_->GetRequest();
HTTP_SYS_LOG("HttpSession", SandeshLevel::UT_DEBUG, request->ToString());
request_queue_.push(request);
// Enqueue new RequestHandler task if needed
if (req_queue_empty_) {
TaskScheduler *scheduler = TaskScheduler::GetInstance();
RequestHandler *task = new RequestHandler(this);
HttpSession::task_count_++;
scheduler->Enqueue(task);
}
request_builder_->Clear();
}
// TODO: error handling
ReleaseBuffer(buffer);
}