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// 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/tools/quic/quic_spdy_server_stream.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "net/quic/quic_flags.h"
#include "net/quic/quic_spdy_session.h"
#include "net/quic/quic_spdy_stream.h"
#include "net/quic/spdy_utils.h"
#include "net/spdy/spdy_protocol.h"
#include "net/tools/quic/quic_in_memory_cache.h"
using base::StringPiece;
using base::StringToInt;
using std::string;
namespace net {
namespace tools {
QuicSpdyServerStream::QuicSpdyServerStream(QuicStreamId id,
QuicSpdySession* session)
: QuicSpdyStream(id, session), content_length_(-1) {}
QuicSpdyServerStream::~QuicSpdyServerStream() {
}
void QuicSpdyServerStream::OnStreamHeadersComplete(bool fin, size_t frame_len) {
QuicSpdyStream::OnStreamHeadersComplete(fin, frame_len);
if (!ParseRequestHeaders(decompressed_headers().data(),
decompressed_headers().length())) {
DVLOG(1) << "Invalid headers";
SendErrorResponse();
}
MarkHeadersConsumed(decompressed_headers().length());
}
void QuicSpdyServerStream::OnDataAvailable() {
while (HasBytesToRead()) {
struct iovec iov;
if (GetReadableRegions(&iov, 1) == 0) {
// No more data to read.
break;
}
DVLOG(1) << "Processed " << iov.iov_len << " bytes for stream " << id();
body_.append(static_cast<char*>(iov.iov_base), iov.iov_len);
if (content_length_ >= 0 &&
static_cast<int>(body_.size()) > content_length_) {
DVLOG(1) << "Body size (" << body_.size() << ") > content length ("
<< content_length_ << ").";
SendErrorResponse();
return;
}
MarkConsumed(iov.iov_len);
}
if (!sequencer()->IsClosed()) {
sequencer()->SetUnblocked();
return;
}
// If the sequencer is closed, then all the body, including the fin, has been
// consumed.
OnFinRead();
if (write_side_closed() || fin_buffered()) {
return;
}
if (request_headers_.empty()) {
DVLOG(1) << "Request headers empty.";
SendErrorResponse();
return;
}
if (content_length_ > 0 &&
content_length_ != static_cast<int>(body_.size())) {
DVLOG(1) << "Content length (" << content_length_ << ") != body size ("
<< body_.size() << ").";
SendErrorResponse();
return;
}
SendResponse();
}
bool QuicSpdyServerStream::ParseRequestHeaders(const char* data,
uint32 data_len) {
DCHECK(headers_decompressed());
SpdyFramer framer(HTTP2);
if (!framer.ParseHeaderBlockInBuffer(data, data_len, &request_headers_) ||
request_headers_.empty()) {
return false; // Headers were invalid.
}
if (ContainsKey(request_headers_, "content-length")) {
string delimiter;
delimiter.push_back('\0');
std::vector<string> values =
base::SplitString(request_headers_["content-length"], delimiter,
base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
for (const string& value : values) {
int new_value;
if (!StringToInt(value, &new_value) || new_value < 0) {
return false;
}
if (content_length_ < 0) {
content_length_ = new_value;
continue;
}
if (new_value != content_length_) {
return false;
}
}
}
return true;
}
void QuicSpdyServerStream::SendResponse() {
if (!ContainsKey(request_headers_, ":authority") ||
!ContainsKey(request_headers_, ":path")) {
DVLOG(1) << "Request headers do not contain :authority or :path.";
SendErrorResponse();
return;
}
// Find response in cache. If not found, send error response.
const QuicInMemoryCache::Response* response =
QuicInMemoryCache::GetInstance()->GetResponse(
request_headers_[":authority"], request_headers_[":path"]);
if (response == nullptr) {
DVLOG(1) << "Response not found in cache.";
SendErrorResponse();
return;
}
if (response->response_type() == QuicInMemoryCache::CLOSE_CONNECTION) {
DVLOG(1) << "Special response: closing connection.";
CloseConnection(QUIC_NO_ERROR);
return;
}
if (response->response_type() == QuicInMemoryCache::IGNORE_REQUEST) {
DVLOG(1) << "Special response: ignoring request.";
return;
}
DVLOG(1) << "Sending response for stream " << id();
SendHeadersAndBody(response->headers(), response->body());
}
void QuicSpdyServerStream::SendErrorResponse() {
DVLOG(1) << "Sending error response for stream " << id();
SpdyHeaderBlock headers;
headers[":status"] = "500";
headers["content-length"] = base::UintToString(strlen(kErrorResponseBody));
SendHeadersAndBody(headers, kErrorResponseBody);
}
void QuicSpdyServerStream::SendHeadersAndBody(
const SpdyHeaderBlock& response_headers,
StringPiece body) {
// This server only supports SPDY and HTTP, and neither handles bidirectional
// streaming.
if (!reading_stopped()) {
// If FLAGS_quic_implement_stop_reading is false,
// behaves as ReliableQuicStream::CloseReadSide().
StopReading();
}
WriteHeaders(response_headers, body.empty(), nullptr);
if (!body.empty()) {
WriteOrBufferData(body, true, nullptr);
}
}
const char* const QuicSpdyServerStream::kErrorResponseBody = "bad";
} // namespace tools
} // namespace net
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