941 lines
31 KiB
C++
941 lines
31 KiB
C++
/*
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* nghttp2 - HTTP/2.0 C 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_http2_upstream.h"
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#include <netinet/tcp.h>
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#include <assert.h>
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#include <cerrno>
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#include <sstream>
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#include "shrpx_client_handler.h"
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#include "shrpx_https_upstream.h"
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#include "shrpx_downstream.h"
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#include "shrpx_downstream_connection.h"
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#include "shrpx_config.h"
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#include "shrpx_http.h"
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#include "shrpx_accesslog.h"
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#include "util.h"
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#include "base64.h"
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using namespace nghttp2;
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namespace shrpx {
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namespace {
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const size_t SHRPX_SPDY_UPSTREAM_OUTPUT_UPPER_THRES = 64*1024;
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} // namespace
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namespace {
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ssize_t send_callback(nghttp2_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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Http2Upstream *upstream = reinterpret_cast<Http2Upstream*>(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 NGHTTP2_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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ULOG(FATAL, upstream) << "evbuffer_add() failed";
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return NGHTTP2_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(nghttp2_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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Http2Upstream *upstream = reinterpret_cast<Http2Upstream*>(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 NGHTTP2_ERR_CALLBACK_FAILURE;
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} else if(nread == 0) {
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return NGHTTP2_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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(nghttp2_session *session, int32_t stream_id, nghttp2_error_code error_code,
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void *user_data)
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{
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Http2Upstream *upstream = reinterpret_cast<Http2Upstream*>(user_data);
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if(LOG_ENABLED(INFO)) {
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ULOG(INFO, upstream) << "Stream stream_id=" << stream_id
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<< " is being closed";
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}
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Downstream *downstream = upstream->find_downstream(stream_id);
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if(downstream) {
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if(downstream->get_request_state() == Downstream::CONNECT_FAIL) {
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upstream->remove_downstream(downstream);
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delete downstream;
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} else {
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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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// At this point, downstream response was read
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if(!downstream->get_upgraded() &&
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!downstream->get_response_connection_close()) {
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// Keep-alive
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DownstreamConnection *dconn;
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dconn = downstream->get_downstream_connection();
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if(dconn) {
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dconn->detach_downstream(downstream);
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}
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}
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upstream->remove_downstream(downstream);
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delete downstream;
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} else {
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// At this point, downstream read may be paused.
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// If shrpx_downstream::push_request_headers() failed, the
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// error is handled here.
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upstream->remove_downstream(downstream);
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delete downstream;
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// How to test this case? Request sufficient large download
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// and make client send RST_STREAM after it gets first DATA
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// frame chunk.
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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 Http2Upstream::upgrade_upstream(HttpsUpstream *http)
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{
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int rv;
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std::string settings_payload;
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auto downstream = http->get_downstream();
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for(auto& hd : downstream->get_request_headers()) {
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if(util::strieq(hd.first.c_str(), "http2-settings")) {
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auto val = hd.second;
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util::to_base64(val);
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settings_payload = base64::decode(std::begin(val), std::end(val));
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break;
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}
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}
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rv = nghttp2_session_upgrade
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(session_,
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reinterpret_cast<const uint8_t*>(settings_payload.c_str()),
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settings_payload.size(),
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nullptr);
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if(rv != 0) {
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ULOG(WARNING, this) << "nghttp2_session_upgrade() returned error: "
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<< nghttp2_strerror(rv);
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return -1;
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}
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pre_upstream_ = http;
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http->pop_downstream();
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downstream->reset_upstream(this);
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add_downstream(downstream);
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downstream->init_response_body_buf();
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downstream->set_stream_id(1);
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downstream->set_priority(0);
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return 0;
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}
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namespace {
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void on_frame_recv_callback
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(nghttp2_session *session, nghttp2_frame *frame, void *user_data)
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{
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auto upstream = reinterpret_cast<Http2Upstream*>(user_data);
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switch(frame->hd.type) {
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case NGHTTP2_HEADERS: {
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if(frame->headers.cat != NGHTTP2_HCAT_REQUEST) {
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break;
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}
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if(LOG_ENABLED(INFO)) {
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ULOG(INFO, upstream) << "Received upstream request HEADERS stream_id="
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<< frame->hd.stream_id;
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}
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auto downstream = new Downstream(upstream,
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frame->hd.stream_id,
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frame->headers.pri);
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upstream->add_downstream(downstream);
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downstream->init_response_body_buf();
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auto nva = frame->headers.nva;
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std::string path, scheme, host, method;
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for(size_t i = 0; i < frame->headers.nvlen; ++i) {
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if(util::strieq(":path", nva[i].name, nva[i].namelen)) {
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path.assign(reinterpret_cast<char*>(nva[i].value), nva[i].valuelen);
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} else if(util::strieq(":scheme", nva[i].name, nva[i].namelen)) {
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scheme.assign(reinterpret_cast<char*>(nva[i].value), nva[i].valuelen);
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} else if(util::strieq(":method", nva[i].name, nva[i].namelen)) {
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method.assign(reinterpret_cast<char*>(nva[i].value), nva[i].valuelen);
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downstream->set_request_method(method);
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} else if(util::strieq(":host", nva[i].name, nva[i].namelen)) {
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host.assign(reinterpret_cast<char*>(nva[i].value), nva[i].valuelen);
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} else if(nva[i].namelen > 0 && nva[i].name[0] != ':') {
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downstream->add_request_header
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(std::string(reinterpret_cast<char*>(nva[i].name), nva[i].namelen),
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std::string(reinterpret_cast<char*>(nva[i].value), nva[i].valuelen));
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}
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}
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if(path.empty() || host.empty() || method.empty()) {
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upstream->rst_stream(downstream, NGHTTP2_PROTOCOL_ERROR);
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return;
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}
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// SpdyDownstreamConnection examines request path to find
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// scheme. We construct abs URI for spdy_bridge mode as well as
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// spdy_proxy mode.
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if((get_config()->spdy_proxy || get_config()->spdy_bridge) &&
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!scheme.empty() && path[0] == '/') {
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std::string reqpath = scheme;
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reqpath += "://";
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reqpath += host;
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reqpath += path;
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downstream->set_request_path(reqpath);
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} else {
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downstream->set_request_path(path);
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}
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downstream->add_request_header("host", host);
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downstream->check_upgrade_request();
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if(LOG_ENABLED(INFO)) {
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std::stringstream ss;
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for(size_t i = 0; i < frame->headers.nvlen; ++i) {
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ss << TTY_HTTP_HD;
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ss.write(reinterpret_cast<char*>(nva[i].name), nva[i].namelen);
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ss << TTY_RST << ": ";
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ss.write(reinterpret_cast<char*>(nva[i].value), nva[i].valuelen);
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ss << "\n";
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}
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ULOG(INFO, upstream) << "HTTP request headers. stream_id="
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<< downstream->get_stream_id()
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<< "\n" << ss.str();
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}
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auto dconn = upstream->get_client_handler()->get_downstream_connection();
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int rv = dconn->attach_downstream(downstream);
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if(rv != 0) {
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// If downstream connection fails, issue RST_STREAM.
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upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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downstream->set_request_state(Downstream::CONNECT_FAIL);
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return;
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}
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rv = downstream->push_request_headers();
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if(rv != 0) {
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upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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return;
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}
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downstream->set_request_state(Downstream::HEADER_COMPLETE);
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if(frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
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downstream->set_request_state(Downstream::MSG_COMPLETE);
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}
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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(nghttp2_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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Http2Upstream *upstream = reinterpret_cast<Http2Upstream*>(user_data);
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Downstream *downstream = upstream->find_downstream(stream_id);
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if(downstream) {
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if(downstream->push_upload_data_chunk(data, len) != 0) {
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upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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return;
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}
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if(upstream->get_flow_control()) {
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downstream->inc_recv_window_size(len);
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if(downstream->get_recv_window_size() >
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upstream->get_initial_window_size()) {
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if(LOG_ENABLED(INFO)) {
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ULOG(INFO, upstream) << "Flow control error: recv_window_size="
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<< downstream->get_recv_window_size()
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<< ", initial_window_size="
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<< upstream->get_initial_window_size();
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}
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upstream->rst_stream(downstream, NGHTTP2_FLOW_CONTROL_ERROR);
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return;
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}
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}
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if(flags & NGHTTP2_FLAG_END_STREAM) {
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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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namespace {
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void on_frame_not_send_callback(nghttp2_session *session,
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nghttp2_frame *frame,
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int lib_error_code, void *user_data)
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{
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auto upstream = reinterpret_cast<Http2Upstream*>(user_data);
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ULOG(WARNING, upstream) << "Failed to send control frame type="
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<< static_cast<uint32_t>(frame->hd.type)
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<< ", lib_error_code=" << lib_error_code << ":"
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<< nghttp2_strerror(lib_error_code);
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if(frame->hd.type == NGHTTP2_HEADERS &&
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frame->headers.cat == NGHTTP2_HCAT_RESPONSE) {
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// To avoid stream hanging around, issue RST_STREAM.
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auto downstream = upstream->find_downstream(frame->hd.stream_id);
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if(downstream) {
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upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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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_frame_recv_parse_error_callback(nghttp2_session *session,
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nghttp2_frame_type type,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload,
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size_t payloadlen, int lib_error_code,
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void *user_data)
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{
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auto upstream = reinterpret_cast<Http2Upstream*>(user_data);
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if(LOG_ENABLED(INFO)) {
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ULOG(INFO, upstream) << "Failed to parse received control frame. type="
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<< type
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<< ", error_code=" << lib_error_code << ":"
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<< nghttp2_strerror(lib_error_code);
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}
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}
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} // namespace
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namespace {
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void on_unknown_frame_recv_callback(nghttp2_session *session,
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const uint8_t *head, size_t headlen,
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const uint8_t *payload, size_t payloadlen,
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void *user_data)
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{
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auto upstream = reinterpret_cast<Http2Upstream*>(user_data);
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if(LOG_ENABLED(INFO)) {
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ULOG(INFO, upstream) << "Received unknown control frame.";
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}
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}
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} // namespace
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namespace {
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nghttp2_error_code infer_upstream_rst_stream_error_code
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(nghttp2_error_code downstream_error_code)
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{
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// Only propagate NGHTTP2_REFUSED_STREAM so that upstream client
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// can resend request.
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if(downstream_error_code != NGHTTP2_REFUSED_STREAM) {
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return NGHTTP2_INTERNAL_ERROR;
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} else {
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return downstream_error_code;
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}
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}
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} // namespace
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Http2Upstream::Http2Upstream(ClientHandler *handler)
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: handler_(handler),
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session_(nullptr),
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pre_upstream_(nullptr)
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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()->upstream_write_timeout);
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nghttp2_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_frame_recv_callback = on_frame_recv_callback;
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callbacks.on_data_chunk_recv_callback = on_data_chunk_recv_callback;
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callbacks.on_frame_not_send_callback = on_frame_not_send_callback;
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callbacks.on_frame_recv_parse_error_callback =
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on_frame_recv_parse_error_callback;
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callbacks.on_unknown_frame_recv_callback = on_unknown_frame_recv_callback;
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int rv;
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rv = nghttp2_session_server_new(&session_, &callbacks, this);
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assert(rv == 0);
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int val = 1;
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flow_control_ = true;
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initial_window_size_ = (1 << get_config()->spdy_upstream_window_bits) - 1;
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rv = nghttp2_session_set_option(session_,
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NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE, &val,
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sizeof(val));
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assert(rv == 0);
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// TODO Maybe call from outside?
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nghttp2_settings_entry entry[2];
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entry[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
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entry[0].value = get_config()->spdy_max_concurrent_streams;
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entry[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
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entry[1].value = initial_window_size_;
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rv = nghttp2_submit_settings
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(session_, entry, sizeof(entry)/sizeof(nghttp2_settings_entry));
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assert(rv == 0);
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// Disable connection-level flow control
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rv = nghttp2_submit_window_update(session_, NGHTTP2_FLAG_END_FLOW_CONTROL,
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0, 0);
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assert(rv == 0);
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}
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Http2Upstream::~Http2Upstream()
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{
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nghttp2_session_del(session_);
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delete pre_upstream_;
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}
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int Http2Upstream::on_read()
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{
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int rv = 0;
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if((rv = nghttp2_session_recv(session_)) < 0) {
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if(rv != NGHTTP2_ERR_EOF) {
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ULOG(ERROR, this) << "nghttp2_session_recv() returned error: "
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<< nghttp2_strerror(rv);
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}
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} else if((rv = nghttp2_session_send(session_)) < 0) {
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ULOG(ERROR, this) << "nghttp2_session_send() returned error: "
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<< nghttp2_strerror(rv);
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}
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if(rv == 0) {
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if(nghttp2_session_want_read(session_) == 0 &&
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nghttp2_session_want_write(session_) == 0 &&
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evbuffer_get_length(bufferevent_get_output(handler_->get_bev())) == 0) {
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if(LOG_ENABLED(INFO)) {
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ULOG(INFO, this) << "No more read/write for this SPDY session";
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}
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rv = -1;
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}
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}
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return rv;
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}
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|
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int Http2Upstream::on_write()
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{
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return send();
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}
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|
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// After this function call, downstream may be deleted.
|
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int Http2Upstream::send()
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{
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int rv = 0;
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if((rv = nghttp2_session_send(session_)) < 0) {
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ULOG(ERROR, this) << "nghttp2_session_send() returned error: "
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<< nghttp2_strerror(rv);
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}
|
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if(rv == 0) {
|
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if(nghttp2_session_want_read(session_) == 0 &&
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nghttp2_session_want_write(session_) == 0 &&
|
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evbuffer_get_length(bufferevent_get_output(handler_->get_bev())) == 0) {
|
|
if(LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "No more read/write for this SPDY session";
|
|
}
|
|
rv = -1;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
int Http2Upstream::on_event()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
ClientHandler* Http2Upstream::get_client_handler() const
|
|
{
|
|
return handler_;
|
|
}
|
|
|
|
namespace {
|
|
void spdy_downstream_readcb(bufferevent *bev, void *ptr)
|
|
{
|
|
DownstreamConnection *dconn = reinterpret_cast<DownstreamConnection*>(ptr);
|
|
Downstream *downstream = dconn->get_downstream();
|
|
Http2Upstream *upstream;
|
|
upstream = static_cast<Http2Upstream*>(downstream->get_upstream());
|
|
if(downstream->get_request_state() == Downstream::STREAM_CLOSED) {
|
|
// If upstream SPDY stream was closed, we just close downstream,
|
|
// because there is no consumer now. Downstream connection is also
|
|
// closed in this case.
|
|
upstream->remove_downstream(downstream);
|
|
delete downstream;
|
|
return;
|
|
}
|
|
|
|
if(downstream->get_response_state() == Downstream::MSG_RESET) {
|
|
// The downstream stream was reset (canceled). In this case,
|
|
// RST_STREAM to the upstream and delete downstream connection
|
|
// here. Deleting downstream will be taken place at
|
|
// on_stream_close_callback.
|
|
upstream->rst_stream(downstream, infer_upstream_rst_stream_error_code
|
|
(downstream->get_response_rst_stream_error_code()));
|
|
downstream->set_downstream_connection(0);
|
|
delete dconn;
|
|
dconn = 0;
|
|
} else {
|
|
int rv = downstream->on_read();
|
|
if(rv != 0) {
|
|
if(LOG_ENABLED(INFO)) {
|
|
DCLOG(INFO, dconn) << "HTTP parser failure";
|
|
}
|
|
if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
} else {
|
|
if(upstream->error_reply(downstream, 502) != 0) {
|
|
delete upstream->get_client_handler();
|
|
return;
|
|
}
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
// Clearly, we have to close downstream connection on http parser
|
|
// failure.
|
|
downstream->set_downstream_connection(0);
|
|
delete dconn;
|
|
dconn = 0;
|
|
}
|
|
}
|
|
if(upstream->send() != 0) {
|
|
delete upstream->get_client_handler();
|
|
return;
|
|
}
|
|
// At this point, downstream may be deleted.
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
void spdy_downstream_writecb(bufferevent *bev, void *ptr)
|
|
{
|
|
if(evbuffer_get_length(bufferevent_get_output(bev)) > 0) {
|
|
return;
|
|
}
|
|
DownstreamConnection *dconn = reinterpret_cast<DownstreamConnection*>(ptr);
|
|
Downstream *downstream = dconn->get_downstream();
|
|
Http2Upstream *upstream;
|
|
upstream = static_cast<Http2Upstream*>(downstream->get_upstream());
|
|
upstream->resume_read(SHRPX_NO_BUFFER, downstream);
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
void spdy_downstream_eventcb(bufferevent *bev, short events, void *ptr)
|
|
{
|
|
DownstreamConnection *dconn = reinterpret_cast<DownstreamConnection*>(ptr);
|
|
Downstream *downstream = dconn->get_downstream();
|
|
Http2Upstream *upstream;
|
|
upstream = static_cast<Http2Upstream*>(downstream->get_upstream());
|
|
if(events & BEV_EVENT_CONNECTED) {
|
|
if(LOG_ENABLED(INFO)) {
|
|
DCLOG(INFO, dconn) << "Connection established. stream_id="
|
|
<< downstream->get_stream_id();
|
|
}
|
|
int fd = bufferevent_getfd(bev);
|
|
int val = 1;
|
|
if(setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
|
|
reinterpret_cast<char *>(&val), sizeof(val)) == -1) {
|
|
DCLOG(WARNING, dconn) << "Setting option TCP_NODELAY failed: errno="
|
|
<< errno;
|
|
}
|
|
} else if(events & BEV_EVENT_EOF) {
|
|
if(LOG_ENABLED(INFO)) {
|
|
DCLOG(INFO, dconn) << "EOF. stream_id=" << downstream->get_stream_id();
|
|
}
|
|
if(downstream->get_request_state() == Downstream::STREAM_CLOSED) {
|
|
// If stream was closed already, we don't need to send reply at
|
|
// the first place. We can delete downstream.
|
|
upstream->remove_downstream(downstream);
|
|
delete downstream;
|
|
} else {
|
|
// Delete downstream connection. If we don't delete it here, it
|
|
// will be pooled in on_stream_close_callback.
|
|
downstream->set_downstream_connection(0);
|
|
delete dconn;
|
|
dconn = 0;
|
|
// downstream wil be deleted in on_stream_close_callback.
|
|
if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
|
|
// Server may indicate the end of the request by EOF
|
|
if(LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, upstream) << "Downstream body was ended by EOF";
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
|
|
// For tunneled connection, MSG_COMPLETE signals
|
|
// spdy_data_read_callback to send RST_STREAM after pending
|
|
// response body is sent. This is needed to ensure that
|
|
// RST_STREAM is sent after all pending data are sent.
|
|
upstream->on_downstream_body_complete(downstream);
|
|
} else if(downstream->get_response_state() != Downstream::MSG_COMPLETE) {
|
|
// If stream was not closed, then we set MSG_COMPLETE and let
|
|
// on_stream_close_callback delete downstream.
|
|
if(upstream->error_reply(downstream, 502) != 0) {
|
|
delete upstream->get_client_handler();
|
|
return;
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
}
|
|
if(upstream->send() != 0) {
|
|
delete upstream->get_client_handler();
|
|
return;
|
|
}
|
|
// At this point, downstream may be deleted.
|
|
}
|
|
} else if(events & (BEV_EVENT_ERROR | BEV_EVENT_TIMEOUT)) {
|
|
if(LOG_ENABLED(INFO)) {
|
|
if(events & BEV_EVENT_ERROR) {
|
|
DCLOG(INFO, dconn) << "Downstream network error: "
|
|
<< evutil_socket_error_to_string
|
|
(EVUTIL_SOCKET_ERROR());
|
|
} else {
|
|
DCLOG(INFO, dconn) << "Timeout";
|
|
}
|
|
if(downstream->get_upgraded()) {
|
|
DCLOG(INFO, dconn) << "Note: this is tunnel connection";
|
|
}
|
|
}
|
|
if(downstream->get_request_state() == Downstream::STREAM_CLOSED) {
|
|
upstream->remove_downstream(downstream);
|
|
delete downstream;
|
|
} else {
|
|
// Delete downstream connection. If we don't delete it here, it
|
|
// will be pooled in on_stream_close_callback.
|
|
downstream->set_downstream_connection(0);
|
|
delete dconn;
|
|
dconn = 0;
|
|
if(downstream->get_response_state() == Downstream::MSG_COMPLETE) {
|
|
// For SSL tunneling
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
} else {
|
|
if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
} else {
|
|
int status;
|
|
if(events & BEV_EVENT_TIMEOUT) {
|
|
status = 504;
|
|
} else {
|
|
status = 502;
|
|
}
|
|
if(upstream->error_reply(downstream, status) != 0) {
|
|
delete upstream->get_client_handler();
|
|
return;
|
|
}
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
}
|
|
if(upstream->send() != 0) {
|
|
delete upstream->get_client_handler();
|
|
return;
|
|
}
|
|
// At this point, downstream may be deleted.
|
|
}
|
|
}
|
|
}
|
|
} // namespace
|
|
|
|
int Http2Upstream::rst_stream(Downstream *downstream,
|
|
nghttp2_error_code error_code)
|
|
{
|
|
if(LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "RST_STREAM stream_id="
|
|
<< downstream->get_stream_id();
|
|
}
|
|
int rv;
|
|
rv = nghttp2_submit_rst_stream(session_, downstream->get_stream_id(),
|
|
error_code);
|
|
if(rv < NGHTTP2_ERR_FATAL) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_rst_stream() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
DIE();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::window_update(Downstream *downstream)
|
|
{
|
|
int rv;
|
|
rv = nghttp2_submit_window_update(session_, NGHTTP2_FLAG_NONE,
|
|
downstream->get_stream_id(),
|
|
downstream->get_recv_window_size());
|
|
downstream->set_recv_window_size(0);
|
|
if(rv < NGHTTP2_ERR_FATAL) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_window_update() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
DIE();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
namespace {
|
|
ssize_t spdy_data_read_callback(nghttp2_session *session,
|
|
int32_t stream_id,
|
|
uint8_t *buf, size_t length,
|
|
int *eof,
|
|
nghttp2_data_source *source,
|
|
void *user_data)
|
|
{
|
|
Downstream *downstream = reinterpret_cast<Downstream*>(source->ptr);
|
|
evbuffer *body = downstream->get_response_body_buf();
|
|
assert(body);
|
|
int nread = evbuffer_remove(body, buf, length);
|
|
if(nread == 0 &&
|
|
downstream->get_response_state() == Downstream::MSG_COMPLETE) {
|
|
if(!downstream->get_upgraded()) {
|
|
*eof = 1;
|
|
} else {
|
|
// For tunneling, issue RST_STREAM to finish the stream.
|
|
Http2Upstream *upstream;
|
|
upstream = reinterpret_cast<Http2Upstream*>(downstream->get_upstream());
|
|
if(LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, upstream) << "RST_STREAM to tunneled stream stream_id="
|
|
<< stream_id;
|
|
}
|
|
upstream->rst_stream(downstream, infer_upstream_rst_stream_error_code
|
|
(downstream->get_response_rst_stream_error_code()));
|
|
}
|
|
}
|
|
if(nread == 0 && *eof != 1) {
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
}
|
|
return nread;
|
|
}
|
|
} // namespace
|
|
|
|
int Http2Upstream::error_reply(Downstream *downstream, int status_code)
|
|
{
|
|
int rv;
|
|
std::string html = http::create_error_html(status_code);
|
|
downstream->init_response_body_buf();
|
|
evbuffer *body = downstream->get_response_body_buf();
|
|
rv = evbuffer_add(body, html.c_str(), html.size());
|
|
if(rv == -1) {
|
|
ULOG(FATAL, this) << "evbuffer_add() failed";
|
|
return -1;
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
|
|
nghttp2_data_provider data_prd;
|
|
data_prd.source.ptr = downstream;
|
|
data_prd.read_callback = spdy_data_read_callback;
|
|
|
|
std::string content_length = util::utos(html.size());
|
|
|
|
const char *nv[] = {
|
|
":status", http::get_status_string(status_code),
|
|
"content-type", "text/html; charset=UTF-8",
|
|
"server", get_config()->server_name,
|
|
"content-length", content_length.c_str(),
|
|
0
|
|
};
|
|
|
|
rv = nghttp2_submit_response(session_, downstream->get_stream_id(), nv,
|
|
&data_prd);
|
|
if(rv < NGHTTP2_ERR_FATAL) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_response() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
DIE();
|
|
}
|
|
if(get_config()->accesslog) {
|
|
upstream_response(get_client_handler()->get_ipaddr(),
|
|
status_code, downstream);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
bufferevent_data_cb Http2Upstream::get_downstream_readcb()
|
|
{
|
|
return spdy_downstream_readcb;
|
|
}
|
|
|
|
bufferevent_data_cb Http2Upstream::get_downstream_writecb()
|
|
{
|
|
return spdy_downstream_writecb;
|
|
}
|
|
|
|
bufferevent_event_cb Http2Upstream::get_downstream_eventcb()
|
|
{
|
|
return spdy_downstream_eventcb;
|
|
}
|
|
|
|
void Http2Upstream::add_downstream(Downstream *downstream)
|
|
{
|
|
downstream_queue_.add(downstream);
|
|
}
|
|
|
|
void Http2Upstream::remove_downstream(Downstream *downstream)
|
|
{
|
|
downstream_queue_.remove(downstream);
|
|
}
|
|
|
|
Downstream* Http2Upstream::find_downstream(int32_t stream_id)
|
|
{
|
|
return downstream_queue_.find(stream_id);
|
|
}
|
|
|
|
nghttp2_session* Http2Upstream::get_spdy_session()
|
|
{
|
|
return session_;
|
|
}
|
|
|
|
// WARNING: Never call directly or indirectly nghttp2_session_send or
|
|
// nghttp2_session_recv. These calls may delete downstream.
|
|
int Http2Upstream::on_downstream_header_complete(Downstream *downstream)
|
|
{
|
|
if(LOG_ENABLED(INFO)) {
|
|
DLOG(INFO, downstream) << "HTTP response header completed";
|
|
}
|
|
size_t nheader = downstream->get_response_headers().size();
|
|
// 4 means :status and possible via header field.
|
|
const char **nv = new const char*[nheader * 2 + 4 + 1];
|
|
size_t hdidx = 0;
|
|
std::string via_value;
|
|
nv[hdidx++] = ":status";
|
|
nv[hdidx++] = http::get_status_string(downstream->get_response_http_status());
|
|
for(Headers::const_iterator i = downstream->get_response_headers().begin();
|
|
i != downstream->get_response_headers().end(); ++i) {
|
|
if(util::strieq((*i).first.c_str(), "transfer-encoding") ||
|
|
util::strieq((*i).first.c_str(), "keep-alive") || // HTTP/1.0?
|
|
util::strieq((*i).first.c_str(), "connection") ||
|
|
util:: strieq((*i).first.c_str(), "proxy-connection")) {
|
|
// These are ignored
|
|
} else if(!get_config()->no_via &&
|
|
util::strieq((*i).first.c_str(), "via")) {
|
|
via_value = (*i).second;
|
|
} else {
|
|
nv[hdidx++] = (*i).first.c_str();
|
|
nv[hdidx++] = (*i).second.c_str();
|
|
}
|
|
}
|
|
if(!get_config()->no_via) {
|
|
if(!via_value.empty()) {
|
|
via_value += ", ";
|
|
}
|
|
via_value += http::create_via_header_value
|
|
(downstream->get_response_major(), downstream->get_response_minor());
|
|
nv[hdidx++] = "via";
|
|
nv[hdidx++] = via_value.c_str();
|
|
}
|
|
nv[hdidx++] = 0;
|
|
if(LOG_ENABLED(INFO)) {
|
|
std::stringstream ss;
|
|
for(size_t i = 0; nv[i]; i += 2) {
|
|
ss << TTY_HTTP_HD << nv[i] << TTY_RST << ": " << nv[i+1] << "\n";
|
|
}
|
|
ULOG(INFO, this) << "HTTP response headers. stream_id="
|
|
<< downstream->get_stream_id() << "\n"
|
|
<< ss.str();
|
|
}
|
|
nghttp2_data_provider data_prd;
|
|
data_prd.source.ptr = downstream;
|
|
data_prd.read_callback = spdy_data_read_callback;
|
|
|
|
int rv;
|
|
rv = nghttp2_submit_response(session_, downstream->get_stream_id(), nv,
|
|
&data_prd);
|
|
delete [] nv;
|
|
if(rv != 0) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_response() failed";
|
|
return -1;
|
|
}
|
|
if(get_config()->accesslog) {
|
|
upstream_response(get_client_handler()->get_ipaddr(),
|
|
downstream->get_response_http_status(),
|
|
downstream);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// WARNING: Never call directly or indirectly nghttp2_session_send or
|
|
// nghttp2_session_recv. These calls may delete downstream.
|
|
int Http2Upstream::on_downstream_body(Downstream *downstream,
|
|
const uint8_t *data, size_t len)
|
|
{
|
|
evbuffer *body = downstream->get_response_body_buf();
|
|
int rv = evbuffer_add(body, data, len);
|
|
if(rv != 0) {
|
|
ULOG(FATAL, this) << "evbuffer_add() failed";
|
|
return -1;
|
|
}
|
|
nghttp2_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;
|
|
}
|
|
|
|
// WARNING: Never call directly or indirectly nghttp2_session_send or
|
|
// nghttp2_session_recv. These calls may delete downstream.
|
|
int Http2Upstream::on_downstream_body_complete(Downstream *downstream)
|
|
{
|
|
if(LOG_ENABLED(INFO)) {
|
|
DLOG(INFO, downstream) << "HTTP response completed";
|
|
}
|
|
nghttp2_session_resume_data(session_, downstream->get_stream_id());
|
|
return 0;
|
|
}
|
|
|
|
bool Http2Upstream::get_flow_control() const
|
|
{
|
|
return flow_control_;
|
|
}
|
|
|
|
int32_t Http2Upstream::get_initial_window_size() const
|
|
{
|
|
return initial_window_size_;
|
|
}
|
|
|
|
void Http2Upstream::pause_read(IOCtrlReason reason)
|
|
{}
|
|
|
|
int Http2Upstream::resume_read(IOCtrlReason reason, Downstream *downstream)
|
|
{
|
|
if(get_flow_control()) {
|
|
if(downstream->get_recv_window_size() >= get_initial_window_size()/2) {
|
|
window_update(downstream);
|
|
}
|
|
}
|
|
return send();
|
|
}
|
|
|
|
} // namespace shrpx
|