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// Copyright (c) 2010 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/websockets/websocket_handshake_draft75.h"
#include "base/ref_counted.h"
#include "base/string_util.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_util.h"
namespace net {
const char WebSocketHandshakeDraft75::kServerHandshakeHeader[] =
"HTTP/1.1 101 Web Socket Protocol Handshake\r\n";
const size_t WebSocketHandshakeDraft75::kServerHandshakeHeaderLength =
sizeof(kServerHandshakeHeader) - 1;
const char WebSocketHandshakeDraft75::kUpgradeHeader[] =
"Upgrade: WebSocket\r\n";
const size_t WebSocketHandshakeDraft75::kUpgradeHeaderLength =
sizeof(kUpgradeHeader) - 1;
const char WebSocketHandshakeDraft75::kConnectionHeader[] =
"Connection: Upgrade\r\n";
const size_t WebSocketHandshakeDraft75::kConnectionHeaderLength =
sizeof(kConnectionHeader) - 1;
WebSocketHandshakeDraft75::WebSocketHandshakeDraft75(
const GURL& url,
const std::string& origin,
const std::string& location,
const std::string& protocol)
: WebSocketHandshake(url, origin, location, protocol) {
}
WebSocketHandshakeDraft75::~WebSocketHandshakeDraft75() {
}
std::string WebSocketHandshakeDraft75::CreateClientHandshakeMessage() {
std::string msg;
msg = "GET ";
msg += GetResourceName();
msg += " HTTP/1.1\r\n";
msg += kUpgradeHeader;
msg += kConnectionHeader;
msg += "Host: ";
msg += GetHostFieldValue();
msg += "\r\n";
msg += "Origin: ";
msg += GetOriginFieldValue();
msg += "\r\n";
if (!protocol_.empty()) {
msg += "WebSocket-Protocol: ";
msg += protocol_;
msg += "\r\n";
}
// TODO(ukai): Add cookie if necessary.
msg += "\r\n";
return msg;
}
int WebSocketHandshakeDraft75::ReadServerHandshake(
const char* data, size_t len) {
mode_ = MODE_INCOMPLETE;
if (len < kServerHandshakeHeaderLength) {
return -1;
}
if (!memcmp(data, kServerHandshakeHeader, kServerHandshakeHeaderLength)) {
mode_ = MODE_NORMAL;
} else {
int eoh = HttpUtil::LocateEndOfHeaders(data, len);
if (eoh < 0)
return -1;
return eoh;
}
const char* p = data + kServerHandshakeHeaderLength;
const char* end = data + len;
if (mode_ == MODE_NORMAL) {
size_t header_size = end - p;
if (header_size < kUpgradeHeaderLength)
return -1;
if (memcmp(p, kUpgradeHeader, kUpgradeHeaderLength)) {
mode_ = MODE_FAILED;
DVLOG(1) << "Bad Upgrade Header " << std::string(p, kUpgradeHeaderLength);
return p - data;
}
p += kUpgradeHeaderLength;
header_size = end - p;
if (header_size < kConnectionHeaderLength)
return -1;
if (memcmp(p, kConnectionHeader, kConnectionHeaderLength)) {
mode_ = MODE_FAILED;
DVLOG(1) << "Bad Connection Header "
<< std::string(p, kConnectionHeaderLength);
return p - data;
}
p += kConnectionHeaderLength;
}
int eoh = HttpUtil::LocateEndOfHeaders(data, len);
if (eoh == -1)
return eoh;
scoped_refptr<HttpResponseHeaders> headers(
new HttpResponseHeaders(HttpUtil::AssembleRawHeaders(data, eoh)));
if (!ProcessHeaders(*headers)) {
DVLOG(1) << "Process Headers failed: " << std::string(data, eoh);
mode_ = MODE_FAILED;
}
switch (mode_) {
case MODE_NORMAL:
if (CheckResponseHeaders()) {
mode_ = MODE_CONNECTED;
} else {
mode_ = MODE_FAILED;
}
break;
default:
mode_ = MODE_FAILED;
break;
}
return eoh;
}
bool WebSocketHandshakeDraft75::ProcessHeaders(
const HttpResponseHeaders& headers) {
if (!GetSingleHeader(headers, "websocket-origin", &ws_origin_))
return false;
if (!GetSingleHeader(headers, "websocket-location", &ws_location_))
return false;
// If |protocol_| is not specified by client, we don't care if there's
// protocol field or not as specified in the spec.
if (!protocol_.empty()
&& !GetSingleHeader(headers, "websocket-protocol", &ws_protocol_))
return false;
return true;
}
bool WebSocketHandshakeDraft75::CheckResponseHeaders() const {
DCHECK(mode_ == MODE_NORMAL);
if (!LowerCaseEqualsASCII(origin_, ws_origin_.c_str()))
return false;
if (location_ != ws_location_)
return false;
if (!protocol_.empty() && protocol_ != ws_protocol_)
return false;
return true;
}
} // namespace net
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