mirror of
https://github.com/moparisthebest/spdylay
synced 2024-11-05 09:05:07 -05:00
555 lines
17 KiB
C++
555 lines
17 KiB
C++
/*
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* Spdylay - SPDY Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "shrpx_spdy_upstream.h"
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#include <assert.h>
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#include <sstream>
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#include "shrpx_client_handler.h"
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#include "shrpx_downstream.h"
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#include "shrpx_config.h"
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#include "shrpx_http.h"
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#include "util.h"
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using namespace spdylay;
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namespace shrpx {
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namespace {
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const size_t SHRPX_SPDY_UPSTREAM_OUTPUT_UPPER_THRES = 512*1024;
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} // namespace
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namespace {
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ssize_t send_callback(spdylay_session *session,
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const uint8_t *data, size_t len, int flags,
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void *user_data)
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{
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int rv;
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SpdyUpstream *upstream = reinterpret_cast<SpdyUpstream*>(user_data);
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ClientHandler *handler = upstream->get_client_handler();
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bufferevent *bev = handler->get_bev();
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evbuffer *output = bufferevent_get_output(bev);
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// Check buffer length and return WOULDBLOCK if it is large enough.
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if(evbuffer_get_length(output) > SHRPX_SPDY_UPSTREAM_OUTPUT_UPPER_THRES) {
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return SPDYLAY_ERR_WOULDBLOCK;
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}
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rv = evbuffer_add(output, data, len);
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if(rv == -1) {
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return SPDYLAY_ERR_CALLBACK_FAILURE;
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} else {
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return len;
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}
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}
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} // namespace
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namespace {
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ssize_t recv_callback(spdylay_session *session,
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uint8_t *data, size_t len, int flags, void *user_data)
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{
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SpdyUpstream *upstream = reinterpret_cast<SpdyUpstream*>(user_data);
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ClientHandler *handler = upstream->get_client_handler();
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bufferevent *bev = handler->get_bev();
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evbuffer *input = bufferevent_get_input(bev);
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int nread = evbuffer_remove(input, data, len);
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if(nread == -1) {
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return SPDYLAY_ERR_CALLBACK_FAILURE;
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} else if(nread == 0) {
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return SPDYLAY_ERR_WOULDBLOCK;
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} else {
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return nread;
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}
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}
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} // namespace
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namespace {
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void on_stream_close_callback
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(spdylay_session *session, int32_t stream_id, spdylay_status_code status_code,
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void *user_data)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "<upstream>::<spdy> Stream " << stream_id
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<< " is being closed";
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}
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SpdyUpstream *upstream = reinterpret_cast<SpdyUpstream*>(user_data);
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Downstream *downstream = upstream->get_downstream_queue()->find(stream_id);
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if(downstream) {
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downstream->set_request_state(Downstream::STREAM_CLOSED);
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if(downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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upstream->get_downstream_queue()->remove(downstream);
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delete downstream;
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}
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}
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}
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} // namespace
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namespace {
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void on_ctrl_recv_callback
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(spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
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void *user_data)
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{
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SpdyUpstream *upstream = reinterpret_cast<SpdyUpstream*>(user_data);
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switch(type) {
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case SPDYLAY_SYN_STREAM: {
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if(ENABLE_LOG) {
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LOG(INFO) << "<upstream>::<spdy> Received upstream SYN_STREAM stream_id="
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<< frame->syn_stream.stream_id;
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}
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Downstream *downstream = new Downstream(upstream,
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frame->syn_stream.stream_id,
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frame->syn_stream.pri);
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downstream->init_response_body_buf();
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char **nv = frame->syn_stream.nv;
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for(size_t i = 0; nv[i]; i += 2) {
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if(strcmp(nv[i], ":path") == 0) {
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downstream->set_request_path(nv[i+1]);
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} else if(strcmp(nv[i], ":method") == 0) {
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downstream->set_request_method(nv[i+1]);
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} else if(nv[i][0] != ':') {
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downstream->add_request_header(nv[i], nv[i+1]);
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}
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}
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downstream->add_request_header("X-Forwarded-Spdy", "true");
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if(ENABLE_LOG) {
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std::stringstream ss;
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for(size_t i = 0; nv[i]; i += 2) {
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ss << nv[i] << ": " << nv[i+1] << "\n";
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}
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LOG(INFO) << "<upstream>::<spdy> Request headers:\n" << ss.str();
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}
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downstream->push_request_headers();
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downstream->set_request_state(Downstream::HEADER_COMPLETE);
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if(frame->syn_stream.hd.flags & SPDYLAY_CTRL_FLAG_FIN) {
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if(ENABLE_LOG) {
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LOG(INFO) << "<upstream>::<spdy> "
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<< "Setting Downstream::MSG_COMPLETE for Downstream "
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<< downstream;
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}
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downstream->set_request_state(Downstream::MSG_COMPLETE);
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}
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upstream->add_downstream(downstream);
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upstream->start_downstream(downstream);
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break;
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}
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default:
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break;
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}
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}
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} // namespace
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namespace {
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void on_data_chunk_recv_callback(spdylay_session *session,
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uint8_t flags, int32_t stream_id,
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const uint8_t *data, size_t len,
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void *user_data)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "<upstream>::<spdy> Received upstream DATA data stream_id="
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<< stream_id;
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}
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SpdyUpstream *upstream = reinterpret_cast<SpdyUpstream*>(user_data);
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Downstream *downstream = upstream->get_downstream_queue()->find(stream_id);
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if(downstream) {
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downstream->push_upload_data_chunk(data, len);
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if(flags & SPDYLAY_DATA_FLAG_FIN) {
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if(ENABLE_LOG) {
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LOG(INFO) << "<upstream>::<spdy> "
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<< "Setting Downstream::MSG_COMPLETE for Downstream "
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<< downstream;
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}
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downstream->set_request_state(Downstream::MSG_COMPLETE);
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}
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}
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}
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} // namespace
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SpdyUpstream::SpdyUpstream(uint16_t version, ClientHandler *handler)
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: handler_(handler),
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session_(0)
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{
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//handler->set_bev_cb(spdy_readcb, 0, spdy_eventcb);
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handler->set_upstream_timeouts(&get_config()->spdy_upstream_read_timeout,
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&get_config()->spdy_upstream_write_timeout);
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spdylay_session_callbacks callbacks;
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memset(&callbacks, 0, sizeof(callbacks));
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callbacks.send_callback = send_callback;
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callbacks.recv_callback = recv_callback;
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callbacks.on_stream_close_callback = on_stream_close_callback;
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callbacks.on_ctrl_recv_callback = on_ctrl_recv_callback;
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callbacks.on_data_chunk_recv_callback = on_data_chunk_recv_callback;
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int rv;
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rv = spdylay_session_server_new(&session_, version, &callbacks, this);
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assert(rv == 0);
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// TODO Maybe call from outside?
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spdylay_settings_entry entry;
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entry.settings_id = SPDYLAY_SETTINGS_MAX_CONCURRENT_STREAMS;
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entry.value = SPDYLAY_INITIAL_MAX_CONCURRENT_STREAMS;
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entry.flags = SPDYLAY_ID_FLAG_SETTINGS_NONE;
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rv = spdylay_submit_settings(session_, SPDYLAY_FLAG_SETTINGS_NONE,
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&entry, 1);
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assert(rv == 0);
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// TODO Maybe call from outside?
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send();
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}
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SpdyUpstream::~SpdyUpstream()
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{
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spdylay_session_del(session_);
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}
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int SpdyUpstream::on_read()
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{
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int rv;
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if((rv = spdylay_session_recv(session_)) ||
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(rv = spdylay_session_send(session_))) {
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if(rv != SPDYLAY_ERR_EOF) {
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LOG(ERROR) << "spdylay error: " << spdylay_strerror(rv);
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DIE();
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}
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}
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return 0;
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}
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int SpdyUpstream::on_write()
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{
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send();
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return 0;
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}
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int SpdyUpstream::send()
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{
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int rv;
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if((rv = spdylay_session_send(session_))) {
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LOG(ERROR) << "spdylay error: " << spdylay_strerror(rv);
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DIE();
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}
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return 0;
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}
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int SpdyUpstream::on_event()
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{
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return 0;
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}
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ClientHandler* SpdyUpstream::get_client_handler() const
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{
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return handler_;
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}
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namespace {
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void spdy_downstream_readcb(bufferevent *bev, void *ptr)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "spdy_downstream_readcb";
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}
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Downstream *downstream = reinterpret_cast<Downstream*>(ptr);
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SpdyUpstream *upstream;
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upstream = static_cast<SpdyUpstream*>(downstream->get_upstream());
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int rv = downstream->parse_http_response();
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if(rv == 0) {
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if(downstream->get_request_state() == Downstream::STREAM_CLOSED &&
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downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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upstream->get_downstream_queue()->remove(downstream);
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delete downstream;
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} else {
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upstream->send();
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}
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} else {
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if(ENABLE_LOG) {
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LOG(INFO) << "<downstream> http parser failure";
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}
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if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
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upstream->rst_stream(downstream, SPDYLAY_INTERNAL_ERROR);
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} else {
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upstream->error_reply(downstream, 502);
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}
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downstream->set_response_state(Downstream::MSG_COMPLETE);
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upstream->send();
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// upstream->remove_downstream(downstream);
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// delete downstream;
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}
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}
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} // namespace
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namespace {
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void spdy_downstream_writecb(bufferevent *bev, void *ptr)
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{
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}
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} // namespace
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namespace {
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void spdy_downstream_eventcb(bufferevent *bev, short events, void *ptr)
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{
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Downstream *downstream = reinterpret_cast<Downstream*>(ptr);
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SpdyUpstream *upstream;
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upstream = static_cast<SpdyUpstream*>(downstream->get_upstream());
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if(events & BEV_EVENT_CONNECTED) {
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if(ENABLE_LOG) {
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LOG(INFO) << "<downstream> Connection established. Downstream "
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<< downstream;
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}
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}
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if(events & BEV_EVENT_EOF) {
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if(ENABLE_LOG) {
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LOG(INFO) << "<downstream> EOF stream_id="
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<< downstream->get_stream_id();
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}
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if(downstream->get_request_state() == Downstream::STREAM_CLOSED) {
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//If stream was closed already, we don't need to send reply at
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// the first place. We can delete downstream.
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upstream->remove_downstream(downstream);
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delete downstream;
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} else {
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// downstream wil be deleted in on_stream_close_callback.
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if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
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// Server may indicate the end of the request by EOF
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if(ENABLE_LOG) {
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LOG(INFO) << "<downstream> Assuming content-length is 0 byte";
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}
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downstream->set_response_state(Downstream::MSG_COMPLETE);
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upstream->on_downstream_body_complete(downstream);
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} else if(downstream->get_response_state() != Downstream::MSG_COMPLETE) {
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// If stream was not closed, then we set MSG_COMPLETE and let
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// on_stream_close_callback delete downstream.
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upstream->error_reply(downstream, 502);
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downstream->set_response_state(Downstream::MSG_COMPLETE);
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upstream->send();
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}
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}
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} else if(events & (BEV_EVENT_ERROR | BEV_EVENT_TIMEOUT)) {
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if(ENABLE_LOG) {
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LOG(INFO) << "<downstream> error/timeout. Downstream " << downstream;
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}
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if(downstream->get_request_state() == Downstream::STREAM_CLOSED) {
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upstream->remove_downstream(downstream);
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delete downstream;
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} else {
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if(downstream->get_response_state() != Downstream::MSG_COMPLETE) {
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if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
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upstream->rst_stream(downstream, SPDYLAY_INTERNAL_ERROR);
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} else {
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int status;
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if(events & BEV_EVENT_TIMEOUT) {
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status = 504;
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} else {
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status = 502;
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}
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upstream->error_reply(downstream, status);
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}
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downstream->set_response_state(Downstream::MSG_COMPLETE);
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upstream->send();
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}
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}
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}
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}
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} // namespace
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int SpdyUpstream::rst_stream(Downstream *downstream, int status_code)
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{
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int rv;
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rv = spdylay_submit_rst_stream(session_, downstream->get_stream_id(),
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status_code);
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if(rv < SPDYLAY_ERR_FATAL) {
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DIE();
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} else {
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return 0;
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}
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}
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namespace {
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ssize_t spdy_data_read_callback(spdylay_session *session,
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int32_t stream_id,
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uint8_t *buf, size_t length,
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int *eof,
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spdylay_data_source *source,
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void *user_data)
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{
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Downstream *downstream = reinterpret_cast<Downstream*>(source->ptr);
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evbuffer *body = downstream->get_response_body_buf();
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assert(body);
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int nread = evbuffer_remove(body, buf, length);
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if(nread == 0 &&
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downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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*eof = 1;
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}
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if(nread == 0 && *eof != 1) {
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return SPDYLAY_ERR_DEFERRED;
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}
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return nread;
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}
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} // namespace
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int SpdyUpstream::error_reply(Downstream *downstream, int status_code)
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{
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int rv;
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std::string html = http::create_error_html(status_code);
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downstream->init_response_body_buf();
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evbuffer *body = downstream->get_response_body_buf();
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rv = evbuffer_add(body, html.c_str(), html.size());
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if(rv == -1) {
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DIE();
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}
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downstream->set_response_state(Downstream::MSG_COMPLETE);
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spdylay_data_provider data_prd;
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data_prd.source.ptr = downstream;
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data_prd.read_callback = spdy_data_read_callback;
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const char *nv[] = {
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":status", http::get_status_string(status_code),
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":version", "http/1.1",
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"content-type", "text/html; charset=UTF-8",
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"server", get_config()->server_name,
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0
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};
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rv = spdylay_submit_response(session_, downstream->get_stream_id(), nv,
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&data_prd);
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if(rv < SPDYLAY_ERR_FATAL) {
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DIE();
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} else {
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return 0;
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}
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}
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bufferevent_data_cb SpdyUpstream::get_downstream_readcb()
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{
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return spdy_downstream_readcb;
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}
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bufferevent_data_cb SpdyUpstream::get_downstream_writecb()
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{
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return spdy_downstream_writecb;
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}
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bufferevent_event_cb SpdyUpstream::get_downstream_eventcb()
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{
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return spdy_downstream_eventcb;
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}
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void SpdyUpstream::add_downstream(Downstream *downstream)
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{
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downstream_queue_.add(downstream);
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}
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void SpdyUpstream::start_downstream(Downstream *downstream)
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{
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downstream_queue_.start(downstream);
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}
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void SpdyUpstream::remove_downstream(Downstream *downstream)
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{
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downstream_queue_.remove(downstream);
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}
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spdylay_session* SpdyUpstream::get_spdy_session()
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{
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return session_;
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}
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int SpdyUpstream::on_downstream_header_complete(Downstream *downstream)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "<downstream> on_downstream_header_complete";
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}
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size_t nheader = downstream->get_response_headers().size();
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const char **nv = new const char*[nheader * 2 + 4 + 1];
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size_t hdidx = 0;
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for(Headers::const_iterator i = downstream->get_response_headers().begin();
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i != downstream->get_response_headers().end(); ++i) {
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if(util::strieq((*i).first.c_str(), "transfer-encoding") ||
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util::strieq((*i).first.c_str(), "keep-alive") || // HTTP/1.0?
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util::strieq((*i).first.c_str(), "connection") ||
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util:: strieq((*i).first.c_str(), "proxy-connection")) {
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// These are ignored
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} else if(util::strieq((*i).first.c_str(), "server")) {
|
|
nv[hdidx++] = "server";
|
|
nv[hdidx++] = get_config()->server_name;
|
|
} else {
|
|
nv[hdidx++] = (*i).first.c_str();
|
|
nv[hdidx++] = (*i).second.c_str();
|
|
}
|
|
}
|
|
nv[hdidx++] = ":status";
|
|
nv[hdidx++] = http::get_status_string(downstream->get_response_http_status());
|
|
nv[hdidx++] = ":version";
|
|
nv[hdidx++] = "HTTP/1.1";
|
|
nv[hdidx++] = 0;
|
|
if(ENABLE_LOG) {
|
|
std::stringstream ss;
|
|
for(size_t i = 0; nv[i]; i += 2) {
|
|
ss << nv[i] << ": " << nv[i+1] << "\n";
|
|
}
|
|
LOG(INFO) << "<upstream>::<spdy> Response headers\n" << ss.str();
|
|
}
|
|
spdylay_data_provider data_prd;
|
|
data_prd.source.ptr = downstream;
|
|
data_prd.read_callback = spdy_data_read_callback;
|
|
|
|
spdylay_submit_response(session_, downstream->get_stream_id(), nv,
|
|
&data_prd);
|
|
delete [] nv;
|
|
return 0;
|
|
}
|
|
|
|
int SpdyUpstream::on_downstream_body(Downstream *downstream,
|
|
const uint8_t *data, size_t len)
|
|
{
|
|
if(ENABLE_LOG) {
|
|
LOG(INFO) << "<downstream> on_downstream_body";
|
|
}
|
|
evbuffer *body = downstream->get_response_body_buf();
|
|
evbuffer_add(body, data, len);
|
|
spdylay_session_resume_data(session_, downstream->get_stream_id());
|
|
|
|
size_t bodylen = evbuffer_get_length(body);
|
|
if(bodylen > SHRPX_SPDY_UPSTREAM_OUTPUT_UPPER_THRES) {
|
|
downstream->pause_read(SHRPX_NO_BUFFER);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int SpdyUpstream::on_downstream_body_complete(Downstream *downstream)
|
|
{
|
|
if(ENABLE_LOG) {
|
|
LOG(INFO) << "<downstream> on_downstream_body_complete";
|
|
}
|
|
spdylay_session_resume_data(session_, downstream->get_stream_id());
|
|
return 0;
|
|
}
|
|
|
|
DownstreamQueue* SpdyUpstream::get_downstream_queue()
|
|
{
|
|
return &downstream_queue_;
|
|
}
|
|
|
|
} // namespace shrpx
|