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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/memory/singleton.h"
#include "net/quic/quic_session.h"
#include "net/spdy/spdy_framer.h"
#include "net/tools/quic/quic_in_memory_cache.h"
#include "net/tools/quic/spdy_utils.h"
using base::StringPiece;
using std::string;
namespace net {
namespace tools {
static const size_t kHeaderBufInitialSize = 4096;
QuicSpdyServerStream::QuicSpdyServerStream(QuicStreamId id,
QuicSession* session)
: QuicDataStream(id, session),
read_buf_(new GrowableIOBuffer()),
request_headers_received_(false) {
}
QuicSpdyServerStream::~QuicSpdyServerStream() {
}
uint32 QuicSpdyServerStream::ProcessData(const char* data, uint32 data_len) {
uint32 total_bytes_processed = 0;
// Are we still reading the request headers.
if (!request_headers_received_) {
// Grow the read buffer if necessary.
if (read_buf_->RemainingCapacity() < (int)data_len) {
read_buf_->SetCapacity(read_buf_->capacity() + kHeaderBufInitialSize);
}
memcpy(read_buf_->data(), data, data_len);
read_buf_->set_offset(read_buf_->offset() + data_len);
ParseRequestHeaders();
} else {
body_.append(data + total_bytes_processed,
data_len - total_bytes_processed);
}
return data_len;
}
void QuicSpdyServerStream::OnFinRead() {
ReliableQuicStream::OnFinRead();
if (write_side_closed() || fin_buffered()) {
return;
}
if (!request_headers_received_) {
SendErrorResponse(); // We're not done reading headers.
} else if ((headers_.content_length_status() ==
BalsaHeadersEnums::VALID_CONTENT_LENGTH) &&
body_.size() != headers_.content_length()) {
SendErrorResponse(); // Invalid content length
} else {
SendResponse();
}
}
void QuicSpdyServerStream::ParseRequestHeaders() {
size_t read_buf_len = static_cast<size_t>(read_buf_->offset());
SpdyFramer framer(SPDY3);
SpdyHeaderBlock headers;
char* data = read_buf_->StartOfBuffer();
size_t len = framer.ParseHeaderBlockInBuffer(data, read_buf_->offset(),
&headers);
if (len == 0) {
return;
}
if (!SpdyUtils::FillBalsaRequestHeaders(headers, &headers_)) {
SendErrorResponse();
return;
}
size_t delta = read_buf_len - len;
if (delta > 0) {
body_.append(data + len, delta);
}
request_headers_received_ = true;
}
void QuicSpdyServerStream::SendResponse() {
// Find response in cache. If not found, send error response.
const QuicInMemoryCache::Response* response =
QuicInMemoryCache::GetInstance()->GetResponse(headers_);
if (response == nullptr) {
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();
BalsaHeaders headers;
headers.SetResponseFirstlineFromStringPieces(
"HTTP/1.1", "500", "Server Error");
headers.ReplaceOrAppendHeader("content-length", "3");
SendHeadersAndBody(headers, "bad");
}
void QuicSpdyServerStream::SendHeadersAndBody(
const BalsaHeaders& response_headers,
StringPiece body) {
// We only support SPDY and HTTP, and neither handles bidirectional streaming.
if (!read_side_closed()) {
CloseReadSide();
}
SpdyHeaderBlock header_block =
SpdyUtils::ResponseHeadersToSpdyHeaders(response_headers);
WriteHeaders(header_block, body.empty(), nullptr);
if (!body.empty()) {
WriteOrBufferData(body, true, nullptr);
}
}
} // namespace tools
} // namespace net
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