blob: f746f066e421798b681ac362b8767682d7883a63 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/server/http_server.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/sys_byteorder.h"
#include "build/build_config.h"
#include "net/base/net_errors.h"
#include "net/server/http_connection.h"
#include "net/server/http_server_request_info.h"
#include "net/server/http_server_response_info.h"
#include "net/server/web_socket.h"
#include "net/socket/tcp_listen_socket.h"
namespace net {
HttpServer::HttpServer(const StreamListenSocketFactory& factory,
HttpServer::Delegate* delegate)
: delegate_(delegate),
server_(factory.CreateAndListen(this)) {
}
void HttpServer::AcceptWebSocket(
int connection_id,
const HttpServerRequestInfo& request) {
HttpConnection* connection = FindConnection(connection_id);
if (connection == NULL)
return;
DCHECK(connection->web_socket_.get());
connection->web_socket_->Accept(request);
}
void HttpServer::SendOverWebSocket(int connection_id,
const std::string& data) {
HttpConnection* connection = FindConnection(connection_id);
if (connection == NULL)
return;
DCHECK(connection->web_socket_.get());
connection->web_socket_->Send(data);
}
void HttpServer::SendRaw(int connection_id, const std::string& data) {
HttpConnection* connection = FindConnection(connection_id);
if (connection == NULL)
return;
connection->Send(data);
}
void HttpServer::SendResponse(int connection_id,
const HttpServerResponseInfo& response) {
HttpConnection* connection = FindConnection(connection_id);
if (connection == NULL)
return;
connection->Send(response);
}
void HttpServer::Send(int connection_id,
HttpStatusCode status_code,
const std::string& data,
const std::string& content_type) {
HttpServerResponseInfo response(status_code);
response.SetBody(data, content_type);
SendResponse(connection_id, response);
}
void HttpServer::Send200(int connection_id,
const std::string& data,
const std::string& content_type) {
Send(connection_id, HTTP_OK, data, content_type);
}
void HttpServer::Send404(int connection_id) {
SendResponse(connection_id, HttpServerResponseInfo::CreateFor404());
}
void HttpServer::Send500(int connection_id, const std::string& message) {
SendResponse(connection_id, HttpServerResponseInfo::CreateFor500(message));
}
void HttpServer::Close(int connection_id) {
HttpConnection* connection = FindConnection(connection_id);
if (connection == NULL)
return;
// Initiating close from server-side does not lead to the DidClose call.
// Do it manually here.
DidClose(connection->socket_.get());
}
int HttpServer::GetLocalAddress(IPEndPoint* address) {
if (!server_)
return ERR_SOCKET_NOT_CONNECTED;
return server_->GetLocalAddress(address);
}
void HttpServer::DidAccept(StreamListenSocket* server,
scoped_ptr<StreamListenSocket> socket) {
HttpConnection* connection = new HttpConnection(this, socket.Pass());
id_to_connection_[connection->id()] = connection;
// TODO(szym): Fix socket access. Make HttpConnection the Delegate.
socket_to_connection_[connection->socket_.get()] = connection;
}
void HttpServer::DidRead(StreamListenSocket* socket,
const char* data,
int len) {
HttpConnection* connection = FindConnection(socket);
DCHECK(connection != NULL);
if (connection == NULL)
return;
connection->recv_data_.append(data, len);
while (connection->recv_data_.length()) {
if (connection->web_socket_.get()) {
std::string message;
WebSocket::ParseResult result = connection->web_socket_->Read(&message);
if (result == WebSocket::FRAME_INCOMPLETE)
break;
if (result == WebSocket::FRAME_CLOSE ||
result == WebSocket::FRAME_ERROR) {
Close(connection->id());
break;
}
delegate_->OnWebSocketMessage(connection->id(), message);
continue;
}
HttpServerRequestInfo request;
size_t pos = 0;
if (!ParseHeaders(connection, &request, &pos))
break;
// Sets peer address if exists.
socket->GetPeerAddress(&request.peer);
if (request.HasHeaderValue("connection", "upgrade")) {
connection->web_socket_.reset(WebSocket::CreateWebSocket(connection,
request,
&pos));
if (!connection->web_socket_.get()) // Not enough data was received.
break;
delegate_->OnWebSocketRequest(connection->id(), request);
connection->Shift(pos);
continue;
}
const char kContentLength[] = "content-length";
if (request.headers.count(kContentLength)) {
size_t content_length = 0;
const size_t kMaxBodySize = 100 << 20;
if (!base::StringToSizeT(request.GetHeaderValue(kContentLength),
&content_length) ||
content_length > kMaxBodySize) {
connection->Send(HttpServerResponseInfo::CreateFor500(
"request content-length too big or unknown: " +
request.GetHeaderValue(kContentLength)));
DidClose(socket);
break;
}
if (connection->recv_data_.length() - pos < content_length)
break; // Not enough data was received yet.
request.data = connection->recv_data_.substr(pos, content_length);
pos += content_length;
}
delegate_->OnHttpRequest(connection->id(), request);
connection->Shift(pos);
}
}
void HttpServer::DidClose(StreamListenSocket* socket) {
HttpConnection* connection = FindConnection(socket);
DCHECK(connection != NULL);
id_to_connection_.erase(connection->id());
socket_to_connection_.erase(connection->socket_.get());
delete connection;
}
HttpServer::~HttpServer() {
STLDeleteContainerPairSecondPointers(
id_to_connection_.begin(), id_to_connection_.end());
}
//
// HTTP Request Parser
// This HTTP request parser uses a simple state machine to quickly parse
// through the headers. The parser is not 100% complete, as it is designed
// for use in this simple test driver.
//
// Known issues:
// - does not handle whitespace on first HTTP line correctly. Expects
// a single space between the method/url and url/protocol.
// Input character types.
enum header_parse_inputs {
INPUT_LWS,
INPUT_CR,
INPUT_LF,
INPUT_COLON,
INPUT_DEFAULT,
MAX_INPUTS,
};
// Parser states.
enum header_parse_states {
ST_METHOD, // Receiving the method
ST_URL, // Receiving the URL
ST_PROTO, // Receiving the protocol
ST_HEADER, // Starting a Request Header
ST_NAME, // Receiving a request header name
ST_SEPARATOR, // Receiving the separator between header name and value
ST_VALUE, // Receiving a request header value
ST_DONE, // Parsing is complete and successful
ST_ERR, // Parsing encountered invalid syntax.
MAX_STATES
};
// State transition table
int parser_state[MAX_STATES][MAX_INPUTS] = {
/* METHOD */ { ST_URL, ST_ERR, ST_ERR, ST_ERR, ST_METHOD },
/* URL */ { ST_PROTO, ST_ERR, ST_ERR, ST_URL, ST_URL },
/* PROTOCOL */ { ST_ERR, ST_HEADER, ST_NAME, ST_ERR, ST_PROTO },
/* HEADER */ { ST_ERR, ST_ERR, ST_NAME, ST_ERR, ST_ERR },
/* NAME */ { ST_SEPARATOR, ST_DONE, ST_ERR, ST_VALUE, ST_NAME },
/* SEPARATOR */ { ST_SEPARATOR, ST_ERR, ST_ERR, ST_VALUE, ST_ERR },
/* VALUE */ { ST_VALUE, ST_HEADER, ST_NAME, ST_VALUE, ST_VALUE },
/* DONE */ { ST_DONE, ST_DONE, ST_DONE, ST_DONE, ST_DONE },
/* ERR */ { ST_ERR, ST_ERR, ST_ERR, ST_ERR, ST_ERR }
};
// Convert an input character to the parser's input token.
int charToInput(char ch) {
switch(ch) {
case ' ':
case '\t':
return INPUT_LWS;
case '\r':
return INPUT_CR;
case '\n':
return INPUT_LF;
case ':':
return INPUT_COLON;
}
return INPUT_DEFAULT;
}
bool HttpServer::ParseHeaders(HttpConnection* connection,
HttpServerRequestInfo* info,
size_t* ppos) {
size_t& pos = *ppos;
size_t data_len = connection->recv_data_.length();
int state = ST_METHOD;
std::string buffer;
std::string header_name;
std::string header_value;
while (pos < data_len) {
char ch = connection->recv_data_[pos++];
int input = charToInput(ch);
int next_state = parser_state[state][input];
bool transition = (next_state != state);
HttpServerRequestInfo::HeadersMap::iterator it;
if (transition) {
// Do any actions based on state transitions.
switch (state) {
case ST_METHOD:
info->method = buffer;
buffer.clear();
break;
case ST_URL:
info->path = buffer;
buffer.clear();
break;
case ST_PROTO:
// TODO(mbelshe): Deal better with parsing protocol.
DCHECK(buffer == "HTTP/1.1");
buffer.clear();
break;
case ST_NAME:
header_name = StringToLowerASCII(buffer);
buffer.clear();
break;
case ST_VALUE:
base::TrimWhitespaceASCII(buffer, base::TRIM_LEADING, &header_value);
it = info->headers.find(header_name);
// See last paragraph ("Multiple message-header fields...")
// of www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
if (it == info->headers.end()) {
info->headers[header_name] = header_value;
} else {
it->second.append(",");
it->second.append(header_value);
}
buffer.clear();
break;
case ST_SEPARATOR:
break;
}
state = next_state;
} else {
// Do any actions based on current state
switch (state) {
case ST_METHOD:
case ST_URL:
case ST_PROTO:
case ST_VALUE:
case ST_NAME:
buffer.append(&ch, 1);
break;
case ST_DONE:
DCHECK(input == INPUT_LF);
return true;
case ST_ERR:
return false;
}
}
}
// No more characters, but we haven't finished parsing yet.
return false;
}
HttpConnection* HttpServer::FindConnection(int connection_id) {
IdToConnectionMap::iterator it = id_to_connection_.find(connection_id);
if (it == id_to_connection_.end())
return NULL;
return it->second;
}
HttpConnection* HttpServer::FindConnection(StreamListenSocket* socket) {
SocketToConnectionMap::iterator it = socket_to_connection_.find(socket);
if (it == socket_to_connection_.end())
return NULL;
return it->second;
}
} // namespace net