2257 lines
65 KiB
C++
2257 lines
65 KiB
C++
/*
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* nghttp2 - HTTP/2 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_worker.h"
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#include "shrpx_http2_session.h"
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#include "shrpx_log.h"
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#ifdef HAVE_MRUBY
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#include "shrpx_mruby.h"
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#endif // HAVE_MRUBY
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#include "http2.h"
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#include "util.h"
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#include "base64.h"
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#include "app_helper.h"
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#include "template.h"
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using namespace nghttp2;
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namespace shrpx {
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namespace {
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constexpr size_t MAX_BUFFER_SIZE = 32_k;
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} // namespace
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namespace {
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int on_stream_close_callback(nghttp2_session *session, int32_t stream_id,
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uint32_t error_code, void *user_data) {
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auto upstream = static_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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auto downstream = static_cast<Downstream *>(
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nghttp2_session_get_stream_user_data(session, stream_id));
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if (!downstream) {
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return 0;
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}
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auto &req = downstream->request();
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upstream->consume(stream_id, req.unconsumed_body_length);
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req.unconsumed_body_length = 0;
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if (downstream->get_request_state() == Downstream::CONNECT_FAIL) {
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upstream->remove_downstream(downstream);
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// downstream was deleted
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return 0;
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}
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if (downstream->can_detach_downstream_connection()) {
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// Keep-alive
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downstream->detach_downstream_connection();
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}
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downstream->set_request_state(Downstream::STREAM_CLOSED);
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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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// downstream was deleted
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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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return 0;
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}
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} // namespace
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int Http2Upstream::upgrade_upstream(HttpsUpstream *http) {
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int rv;
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auto &balloc = http->get_downstream()->get_block_allocator();
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auto http2_settings = http->get_downstream()->get_http2_settings();
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http2_settings = util::to_base64(balloc, http2_settings);
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auto settings_payload = base64::decode(balloc, std::begin(http2_settings),
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std::end(http2_settings));
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rv = nghttp2_session_upgrade2(
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session_, settings_payload.byte(), settings_payload.size(),
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http->get_downstream()->request().method == HTTP_HEAD, nullptr);
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if (rv != 0) {
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if (LOG_ENABLED(INFO)) {
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ULOG(INFO, this) << "nghttp2_session_upgrade() returned error: "
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<< nghttp2_strerror(rv);
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}
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return -1;
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}
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pre_upstream_.reset(http);
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auto downstream = http->pop_downstream();
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downstream->reset_upstream(this);
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downstream->set_stream_id(1);
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downstream->reset_upstream_rtimer();
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downstream->set_stream_id(1);
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auto ptr = downstream.get();
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nghttp2_session_set_stream_user_data(session_, 1, ptr);
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downstream_queue_.add_pending(std::move(downstream));
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downstream_queue_.mark_active(ptr);
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// TODO This might not be necessary
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handler_->stop_read_timer();
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if (LOG_ENABLED(INFO)) {
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ULOG(INFO, this) << "Connection upgraded to HTTP/2";
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}
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return 0;
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}
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void Http2Upstream::start_settings_timer() {
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ev_timer_start(handler_->get_loop(), &settings_timer_);
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}
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void Http2Upstream::stop_settings_timer() {
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ev_timer_stop(handler_->get_loop(), &settings_timer_);
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}
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namespace {
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int on_header_callback2(nghttp2_session *session, const nghttp2_frame *frame,
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nghttp2_rcbuf *name, nghttp2_rcbuf *value,
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uint8_t flags, void *user_data) {
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auto namebuf = nghttp2_rcbuf_get_buf(name);
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auto valuebuf = nghttp2_rcbuf_get_buf(value);
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auto config = get_config();
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if (config->http2.upstream.debug.frame_debug) {
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verbose_on_header_callback(session, frame, namebuf.base, namebuf.len,
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valuebuf.base, valuebuf.len, flags, user_data);
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}
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if (frame->hd.type != NGHTTP2_HEADERS) {
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return 0;
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}
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auto upstream = static_cast<Http2Upstream *>(user_data);
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auto downstream = static_cast<Downstream *>(
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nghttp2_session_get_stream_user_data(session, frame->hd.stream_id));
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if (!downstream) {
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return 0;
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}
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auto &req = downstream->request();
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auto &httpconf = config->http;
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if (req.fs.buffer_size() + namebuf.len + valuebuf.len >
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httpconf.request_header_field_buffer ||
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req.fs.num_fields() >= httpconf.max_request_header_fields) {
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if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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return 0;
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}
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if (LOG_ENABLED(INFO)) {
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ULOG(INFO, upstream) << "Too large or many header field size="
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<< req.fs.buffer_size() + namebuf.len + valuebuf.len
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<< ", num=" << req.fs.num_fields() + 1;
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}
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// just ignore header fields if this is trailer part.
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if (frame->headers.cat == NGHTTP2_HCAT_HEADERS) {
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return 0;
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}
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if (upstream->error_reply(downstream, 431) != 0) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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return 0;
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}
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auto token = http2::lookup_token(namebuf.base, namebuf.len);
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auto no_index = flags & NGHTTP2_NV_FLAG_NO_INDEX;
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downstream->add_rcbuf(name);
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downstream->add_rcbuf(value);
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if (frame->headers.cat == NGHTTP2_HCAT_HEADERS) {
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// just store header fields for trailer part
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req.fs.add_trailer_token(StringRef{namebuf.base, namebuf.len},
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StringRef{valuebuf.base, valuebuf.len}, no_index,
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token);
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return 0;
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}
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req.fs.add_header_token(StringRef{namebuf.base, namebuf.len},
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StringRef{valuebuf.base, valuebuf.len}, no_index,
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token);
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return 0;
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}
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} // namespace
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namespace {
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int on_invalid_header_callback2(nghttp2_session *session,
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const nghttp2_frame *frame, nghttp2_rcbuf *name,
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nghttp2_rcbuf *value, uint8_t flags,
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void *user_data) {
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auto upstream = static_cast<Http2Upstream *>(user_data);
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auto downstream = static_cast<Downstream *>(
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nghttp2_session_get_stream_user_data(session, frame->hd.stream_id));
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if (!downstream) {
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return 0;
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}
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if (LOG_ENABLED(INFO)) {
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auto namebuf = nghttp2_rcbuf_get_buf(name);
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auto valuebuf = nghttp2_rcbuf_get_buf(value);
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ULOG(INFO, upstream) << "Invalid header field for stream_id="
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<< frame->hd.stream_id << ": name=["
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<< StringRef{namebuf.base, namebuf.len} << "], value=["
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<< StringRef{valuebuf.base, valuebuf.len} << "]";
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}
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upstream->rst_stream(downstream, NGHTTP2_PROTOCOL_ERROR);
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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} // namespace
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namespace {
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int on_begin_headers_callback(nghttp2_session *session,
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const nghttp2_frame *frame, void *user_data) {
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auto upstream = static_cast<Http2Upstream *>(user_data);
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if (frame->headers.cat != NGHTTP2_HCAT_REQUEST) {
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return 0;
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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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upstream->on_start_request(frame);
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return 0;
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}
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} // namespace
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void Http2Upstream::on_start_request(const nghttp2_frame *frame) {
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auto downstream = make_unique<Downstream>(this, handler_->get_mcpool(),
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frame->hd.stream_id);
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nghttp2_session_set_stream_user_data(session_, frame->hd.stream_id,
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downstream.get());
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downstream->reset_upstream_rtimer();
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handler_->repeat_read_timer();
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auto &req = downstream->request();
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// Although, we deprecated minor version from HTTP/2, we supply
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// minor version 0 to use via header field in a conventional way.
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req.http_major = 2;
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req.http_minor = 0;
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add_pending_downstream(std::move(downstream));
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++num_requests_;
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auto config = get_config();
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auto &httpconf = config->http;
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if (httpconf.max_requests <= num_requests_) {
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start_graceful_shutdown();
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}
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}
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int Http2Upstream::on_request_headers(Downstream *downstream,
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const nghttp2_frame *frame) {
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auto lgconf = log_config();
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lgconf->update_tstamp(std::chrono::system_clock::now());
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auto &req = downstream->request();
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req.tstamp = lgconf->tstamp;
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if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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return 0;
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}
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auto &nva = req.fs.headers();
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if (LOG_ENABLED(INFO)) {
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std::stringstream ss;
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for (auto &nv : nva) {
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ss << TTY_HTTP_HD << nv.name << TTY_RST << ": " << nv.value << "\n";
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}
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ULOG(INFO, this) << "HTTP request headers. stream_id="
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<< downstream->get_stream_id() << "\n"
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<< ss.str();
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}
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auto config = get_config();
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auto &dump = config->http2.upstream.debug.dump;
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if (dump.request_header) {
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http2::dump_nv(dump.request_header, nva);
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}
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auto content_length = req.fs.header(http2::HD_CONTENT_LENGTH);
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if (content_length) {
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// libnghttp2 guarantees this can be parsed
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req.fs.content_length = util::parse_uint(content_length->value);
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}
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// presence of mandatory header fields are guaranteed by libnghttp2.
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auto authority = req.fs.header(http2::HD__AUTHORITY);
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auto path = req.fs.header(http2::HD__PATH);
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auto method = req.fs.header(http2::HD__METHOD);
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auto scheme = req.fs.header(http2::HD__SCHEME);
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auto method_token = http2::lookup_method_token(method->value);
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if (method_token == -1) {
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if (error_reply(downstream, 501) != 0) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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return 0;
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}
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auto faddr = handler_->get_upstream_addr();
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// For HTTP/2 proxy, we require :authority.
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if (method_token != HTTP_CONNECT && config->http2_proxy && !faddr->alt_mode &&
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!authority) {
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rst_stream(downstream, NGHTTP2_PROTOCOL_ERROR);
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return 0;
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}
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req.method = method_token;
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if (scheme) {
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req.scheme = scheme->value;
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}
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// nghttp2 library guarantees either :authority or host exist
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if (!authority) {
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req.no_authority = true;
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authority = req.fs.header(http2::HD_HOST);
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}
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if (authority) {
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req.authority = authority->value;
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}
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if (path) {
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if (method_token == HTTP_OPTIONS &&
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path->value == StringRef::from_lit("*")) {
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// Server-wide OPTIONS request. Path is empty.
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} else if (config->http2_proxy && !faddr->alt_mode) {
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req.path = path->value;
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} else {
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req.path = http2::rewrite_clean_path(downstream->get_block_allocator(),
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path->value);
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}
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}
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if (!(frame->hd.flags & NGHTTP2_FLAG_END_STREAM)) {
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req.http2_expect_body = true;
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} else if (req.fs.content_length == -1) {
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// If END_STREAM flag is set to HEADERS frame, we are sure that
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// content-length is 0.
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req.fs.content_length = 0;
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}
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downstream->inspect_http2_request();
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downstream->set_request_state(Downstream::HEADER_COMPLETE);
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#ifdef HAVE_MRUBY
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auto upstream = downstream->get_upstream();
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auto handler = upstream->get_client_handler();
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auto worker = handler->get_worker();
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auto mruby_ctx = worker->get_mruby_context();
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if (mruby_ctx->run_on_request_proc(downstream) != 0) {
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if (error_reply(downstream, 500) != 0) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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return 0;
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}
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#endif // HAVE_MRUBY
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if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
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downstream->disable_upstream_rtimer();
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downstream->set_request_state(Downstream::MSG_COMPLETE);
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}
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if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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return 0;
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}
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start_downstream(downstream);
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return 0;
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}
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void Http2Upstream::start_downstream(Downstream *downstream) {
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if (downstream_queue_.can_activate(downstream->request().authority)) {
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initiate_downstream(downstream);
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return;
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}
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downstream_queue_.mark_blocked(downstream);
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}
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void Http2Upstream::initiate_downstream(Downstream *downstream) {
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int rv;
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auto dconn = handler_->get_downstream_connection(rv, downstream);
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if (!dconn) {
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if (rv == SHRPX_ERR_TLS_REQUIRED) {
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rv = redirect_to_https(downstream);
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} else {
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rv = error_reply(downstream, 502);
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}
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if (rv != 0) {
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rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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}
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downstream->set_request_state(Downstream::CONNECT_FAIL);
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downstream_queue_.mark_failure(downstream);
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return;
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}
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rv = downstream->attach_downstream_connection(std::move(dconn));
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if (rv != 0) {
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// downstream connection fails, send error page
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if (error_reply(downstream, 502) != 0) {
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rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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}
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downstream->set_request_state(Downstream::CONNECT_FAIL);
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downstream_queue_.mark_failure(downstream);
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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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if (error_reply(downstream, 502) != 0) {
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rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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}
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downstream_queue_.mark_failure(downstream);
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return;
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}
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downstream_queue_.mark_active(downstream);
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auto &req = downstream->request();
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if (!req.http2_expect_body) {
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rv = downstream->end_upload_data();
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if (rv != 0) {
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rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
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}
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}
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return;
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}
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namespace {
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int on_frame_recv_callback(nghttp2_session *session, const nghttp2_frame *frame,
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void *user_data) {
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if (get_config()->http2.upstream.debug.frame_debug) {
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verbose_on_frame_recv_callback(session, frame, user_data);
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}
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auto upstream = static_cast<Http2Upstream *>(user_data);
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auto handler = upstream->get_client_handler();
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switch (frame->hd.type) {
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case NGHTTP2_DATA: {
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auto downstream = static_cast<Downstream *>(
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nghttp2_session_get_stream_user_data(session, frame->hd.stream_id));
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if (!downstream) {
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return 0;
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}
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|
|
if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
downstream->disable_upstream_rtimer();
|
|
|
|
if (downstream->end_upload_data() != 0) {
|
|
if (downstream->get_response_state() != Downstream::MSG_COMPLETE) {
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
}
|
|
|
|
downstream->set_request_state(Downstream::MSG_COMPLETE);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_HEADERS: {
|
|
auto downstream = static_cast<Downstream *>(
|
|
nghttp2_session_get_stream_user_data(session, frame->hd.stream_id));
|
|
if (!downstream) {
|
|
return 0;
|
|
}
|
|
|
|
if (frame->headers.cat == NGHTTP2_HCAT_REQUEST) {
|
|
downstream->reset_upstream_rtimer();
|
|
|
|
handler->stop_read_timer();
|
|
|
|
return upstream->on_request_headers(downstream, frame);
|
|
}
|
|
|
|
if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
downstream->disable_upstream_rtimer();
|
|
|
|
if (downstream->end_upload_data() != 0) {
|
|
if (downstream->get_response_state() != Downstream::MSG_COMPLETE) {
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
}
|
|
|
|
downstream->set_request_state(Downstream::MSG_COMPLETE);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_SETTINGS:
|
|
if ((frame->hd.flags & NGHTTP2_FLAG_ACK) == 0) {
|
|
return 0;
|
|
}
|
|
upstream->stop_settings_timer();
|
|
return 0;
|
|
case NGHTTP2_GOAWAY:
|
|
if (LOG_ENABLED(INFO)) {
|
|
auto debug_data = util::ascii_dump(frame->goaway.opaque_data,
|
|
frame->goaway.opaque_data_len);
|
|
|
|
ULOG(INFO, upstream) << "GOAWAY received: last-stream-id="
|
|
<< frame->goaway.last_stream_id
|
|
<< ", error_code=" << frame->goaway.error_code
|
|
<< ", debug_data=" << debug_data;
|
|
}
|
|
return 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
int on_data_chunk_recv_callback(nghttp2_session *session, uint8_t flags,
|
|
int32_t stream_id, const uint8_t *data,
|
|
size_t len, void *user_data) {
|
|
auto upstream = static_cast<Http2Upstream *>(user_data);
|
|
auto downstream = static_cast<Downstream *>(
|
|
nghttp2_session_get_stream_user_data(session, stream_id));
|
|
|
|
if (!downstream || !downstream->get_downstream_connection()) {
|
|
if (upstream->consume(stream_id, len) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
downstream->reset_upstream_rtimer();
|
|
|
|
if (downstream->push_upload_data_chunk(data, len) != 0) {
|
|
if (downstream->get_response_state() != Downstream::MSG_COMPLETE) {
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
|
|
if (upstream->consume(stream_id, len) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
int on_frame_send_callback(nghttp2_session *session, const nghttp2_frame *frame,
|
|
void *user_data) {
|
|
if (get_config()->http2.upstream.debug.frame_debug) {
|
|
verbose_on_frame_send_callback(session, frame, user_data);
|
|
}
|
|
auto upstream = static_cast<Http2Upstream *>(user_data);
|
|
auto handler = upstream->get_client_handler();
|
|
|
|
switch (frame->hd.type) {
|
|
case NGHTTP2_DATA:
|
|
case NGHTTP2_HEADERS: {
|
|
if ((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
|
|
return 0;
|
|
}
|
|
// RST_STREAM if request is still incomplete.
|
|
auto stream_id = frame->hd.stream_id;
|
|
auto downstream = static_cast<Downstream *>(
|
|
nghttp2_session_get_stream_user_data(session, stream_id));
|
|
|
|
if (!downstream) {
|
|
return 0;
|
|
}
|
|
|
|
// For tunneling, issue RST_STREAM to finish the stream.
|
|
if (downstream->get_upgraded() ||
|
|
nghttp2_session_get_stream_remote_close(session, stream_id) == 0) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, upstream)
|
|
<< "Send RST_STREAM to "
|
|
<< (downstream->get_upgraded() ? "tunneled " : "")
|
|
<< "stream stream_id=" << downstream->get_stream_id()
|
|
<< " to finish off incomplete request";
|
|
}
|
|
|
|
upstream->rst_stream(downstream, NGHTTP2_NO_ERROR);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_SETTINGS:
|
|
if ((frame->hd.flags & NGHTTP2_FLAG_ACK) == 0) {
|
|
upstream->start_settings_timer();
|
|
}
|
|
return 0;
|
|
case NGHTTP2_PUSH_PROMISE: {
|
|
auto promised_stream_id = frame->push_promise.promised_stream_id;
|
|
|
|
if (nghttp2_session_get_stream_user_data(session, promised_stream_id)) {
|
|
// In case of push from backend, downstream object was already
|
|
// created.
|
|
return 0;
|
|
}
|
|
|
|
auto promised_downstream = make_unique<Downstream>(
|
|
upstream, handler->get_mcpool(), promised_stream_id);
|
|
auto &req = promised_downstream->request();
|
|
|
|
// As long as we use nghttp2_session_mem_send(), setting stream
|
|
// user data here should not fail. This is because this callback
|
|
// is called just after frame was serialized. So no worries about
|
|
// hanging Downstream.
|
|
nghttp2_session_set_stream_user_data(session, promised_stream_id,
|
|
promised_downstream.get());
|
|
|
|
promised_downstream->set_assoc_stream_id(frame->hd.stream_id);
|
|
promised_downstream->disable_upstream_rtimer();
|
|
|
|
req.http_major = 2;
|
|
req.http_minor = 0;
|
|
|
|
req.fs.content_length = 0;
|
|
req.http2_expect_body = false;
|
|
|
|
auto &promised_balloc = promised_downstream->get_block_allocator();
|
|
|
|
for (size_t i = 0; i < frame->push_promise.nvlen; ++i) {
|
|
auto &nv = frame->push_promise.nva[i];
|
|
|
|
auto name =
|
|
make_string_ref(promised_balloc, StringRef{nv.name, nv.namelen});
|
|
auto value =
|
|
make_string_ref(promised_balloc, StringRef{nv.value, nv.valuelen});
|
|
|
|
auto token = http2::lookup_token(nv.name, nv.namelen);
|
|
switch (token) {
|
|
case http2::HD__METHOD:
|
|
req.method = http2::lookup_method_token(value);
|
|
break;
|
|
case http2::HD__SCHEME:
|
|
req.scheme = value;
|
|
break;
|
|
case http2::HD__AUTHORITY:
|
|
req.authority = value;
|
|
break;
|
|
case http2::HD__PATH:
|
|
req.path = http2::rewrite_clean_path(promised_balloc, value);
|
|
break;
|
|
}
|
|
req.fs.add_header_token(name, value, nv.flags & NGHTTP2_NV_FLAG_NO_INDEX,
|
|
token);
|
|
}
|
|
|
|
promised_downstream->inspect_http2_request();
|
|
|
|
promised_downstream->set_request_state(Downstream::MSG_COMPLETE);
|
|
|
|
// a bit weird but start_downstream() expects that given
|
|
// downstream is in pending queue.
|
|
auto ptr = promised_downstream.get();
|
|
upstream->add_pending_downstream(std::move(promised_downstream));
|
|
|
|
#ifdef HAVE_MRUBY
|
|
auto worker = handler->get_worker();
|
|
auto mruby_ctx = worker->get_mruby_context();
|
|
|
|
if (mruby_ctx->run_on_request_proc(ptr) != 0) {
|
|
if (upstream->error_reply(ptr, 500) != 0) {
|
|
upstream->rst_stream(ptr, NGHTTP2_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif // HAVE_MRUBY
|
|
|
|
upstream->start_downstream(ptr);
|
|
|
|
return 0;
|
|
}
|
|
case NGHTTP2_GOAWAY:
|
|
if (LOG_ENABLED(INFO)) {
|
|
auto debug_data = util::ascii_dump(frame->goaway.opaque_data,
|
|
frame->goaway.opaque_data_len);
|
|
|
|
ULOG(INFO, upstream) << "Sending GOAWAY: last-stream-id="
|
|
<< frame->goaway.last_stream_id
|
|
<< ", error_code=" << frame->goaway.error_code
|
|
<< ", debug_data=" << debug_data;
|
|
}
|
|
return 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
int on_frame_not_send_callback(nghttp2_session *session,
|
|
const nghttp2_frame *frame, int lib_error_code,
|
|
void *user_data) {
|
|
auto upstream = static_cast<Http2Upstream *>(user_data);
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, upstream) << "Failed to send control frame type="
|
|
<< static_cast<uint32_t>(frame->hd.type)
|
|
<< ", lib_error_code=" << lib_error_code << ":"
|
|
<< nghttp2_strerror(lib_error_code);
|
|
}
|
|
if (frame->hd.type == NGHTTP2_HEADERS &&
|
|
lib_error_code != NGHTTP2_ERR_STREAM_CLOSED &&
|
|
lib_error_code != NGHTTP2_ERR_STREAM_CLOSING) {
|
|
// To avoid stream hanging around, issue RST_STREAM.
|
|
auto downstream = static_cast<Downstream *>(
|
|
nghttp2_session_get_stream_user_data(session, frame->hd.stream_id));
|
|
if (downstream) {
|
|
upstream->rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
constexpr auto PADDING = std::array<uint8_t, 256>{};
|
|
} // namespace
|
|
|
|
namespace {
|
|
int send_data_callback(nghttp2_session *session, nghttp2_frame *frame,
|
|
const uint8_t *framehd, size_t length,
|
|
nghttp2_data_source *source, void *user_data) {
|
|
auto downstream = static_cast<Downstream *>(source->ptr);
|
|
auto upstream = static_cast<Http2Upstream *>(downstream->get_upstream());
|
|
auto body = downstream->get_response_buf();
|
|
|
|
auto wb = upstream->get_response_buf();
|
|
|
|
size_t padlen = 0;
|
|
|
|
wb->append(framehd, 9);
|
|
if (frame->data.padlen > 0) {
|
|
padlen = frame->data.padlen - 1;
|
|
wb->append(static_cast<uint8_t>(padlen));
|
|
}
|
|
|
|
body->remove(*wb, length);
|
|
|
|
wb->append(PADDING.data(), padlen);
|
|
|
|
if (body->rleft() == 0) {
|
|
downstream->disable_upstream_wtimer();
|
|
} else {
|
|
downstream->reset_upstream_wtimer();
|
|
}
|
|
|
|
if (length > 0 && downstream->resume_read(SHRPX_NO_BUFFER, length) != 0) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
// We have to add length here, so that we can log this amount of
|
|
// data transferred.
|
|
downstream->response_sent_body_length += length;
|
|
|
|
auto max_buffer_size = upstream->get_max_buffer_size();
|
|
|
|
return wb->rleft() >= max_buffer_size ? NGHTTP2_ERR_PAUSE : 0;
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
uint32_t infer_upstream_rst_stream_error_code(uint32_t downstream_error_code) {
|
|
// NGHTTP2_REFUSED_STREAM is important because it tells upstream
|
|
// client to retry.
|
|
switch (downstream_error_code) {
|
|
case NGHTTP2_NO_ERROR:
|
|
case NGHTTP2_REFUSED_STREAM:
|
|
return downstream_error_code;
|
|
default:
|
|
return NGHTTP2_INTERNAL_ERROR;
|
|
}
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
void settings_timeout_cb(struct ev_loop *loop, ev_timer *w, int revents) {
|
|
auto upstream = static_cast<Http2Upstream *>(w->data);
|
|
auto handler = upstream->get_client_handler();
|
|
ULOG(INFO, upstream) << "SETTINGS timeout";
|
|
if (upstream->terminate_session(NGHTTP2_SETTINGS_TIMEOUT) != 0) {
|
|
delete handler;
|
|
return;
|
|
}
|
|
handler->signal_write();
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
void shutdown_timeout_cb(struct ev_loop *loop, ev_timer *w, int revents) {
|
|
auto upstream = static_cast<Http2Upstream *>(w->data);
|
|
auto handler = upstream->get_client_handler();
|
|
upstream->submit_goaway();
|
|
handler->signal_write();
|
|
}
|
|
} // namespace
|
|
|
|
namespace {
|
|
void prepare_cb(struct ev_loop *loop, ev_prepare *w, int revents) {
|
|
auto upstream = static_cast<Http2Upstream *>(w->data);
|
|
upstream->check_shutdown();
|
|
}
|
|
} // namespace
|
|
|
|
void Http2Upstream::submit_goaway() {
|
|
auto last_stream_id = nghttp2_session_get_last_proc_stream_id(session_);
|
|
nghttp2_submit_goaway(session_, NGHTTP2_FLAG_NONE, last_stream_id,
|
|
NGHTTP2_NO_ERROR, nullptr, 0);
|
|
}
|
|
|
|
void Http2Upstream::check_shutdown() {
|
|
auto worker = handler_->get_worker();
|
|
|
|
if (!worker->get_graceful_shutdown()) {
|
|
return;
|
|
}
|
|
|
|
ev_prepare_stop(handler_->get_loop(), &prep_);
|
|
|
|
start_graceful_shutdown();
|
|
}
|
|
|
|
void Http2Upstream::start_graceful_shutdown() {
|
|
int rv;
|
|
if (ev_is_active(&shutdown_timer_)) {
|
|
return;
|
|
}
|
|
|
|
rv = nghttp2_submit_shutdown_notice(session_);
|
|
if (rv != 0) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_shutdown_notice() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
return;
|
|
}
|
|
|
|
handler_->signal_write();
|
|
|
|
ev_timer_start(handler_->get_loop(), &shutdown_timer_);
|
|
}
|
|
|
|
nghttp2_session_callbacks *create_http2_upstream_callbacks() {
|
|
int rv;
|
|
nghttp2_session_callbacks *callbacks;
|
|
|
|
rv = nghttp2_session_callbacks_new(&callbacks);
|
|
|
|
if (rv != 0) {
|
|
return nullptr;
|
|
}
|
|
|
|
nghttp2_session_callbacks_set_on_stream_close_callback(
|
|
callbacks, on_stream_close_callback);
|
|
|
|
nghttp2_session_callbacks_set_on_frame_recv_callback(callbacks,
|
|
on_frame_recv_callback);
|
|
|
|
nghttp2_session_callbacks_set_on_data_chunk_recv_callback(
|
|
callbacks, on_data_chunk_recv_callback);
|
|
|
|
nghttp2_session_callbacks_set_on_frame_send_callback(callbacks,
|
|
on_frame_send_callback);
|
|
|
|
nghttp2_session_callbacks_set_on_frame_not_send_callback(
|
|
callbacks, on_frame_not_send_callback);
|
|
|
|
nghttp2_session_callbacks_set_on_header_callback2(callbacks,
|
|
on_header_callback2);
|
|
|
|
nghttp2_session_callbacks_set_on_invalid_header_callback2(
|
|
callbacks, on_invalid_header_callback2);
|
|
|
|
nghttp2_session_callbacks_set_on_begin_headers_callback(
|
|
callbacks, on_begin_headers_callback);
|
|
|
|
nghttp2_session_callbacks_set_send_data_callback(callbacks,
|
|
send_data_callback);
|
|
|
|
auto config = get_config();
|
|
|
|
if (config->padding) {
|
|
nghttp2_session_callbacks_set_select_padding_callback(
|
|
callbacks, http::select_padding_callback);
|
|
}
|
|
|
|
if (config->http2.upstream.debug.frame_debug) {
|
|
nghttp2_session_callbacks_set_error_callback(callbacks,
|
|
verbose_error_callback);
|
|
}
|
|
|
|
return callbacks;
|
|
}
|
|
|
|
namespace {
|
|
size_t downstream_queue_size(Worker *worker) {
|
|
auto &downstreamconf = *worker->get_downstream_config();
|
|
|
|
if (get_config()->http2_proxy) {
|
|
return downstreamconf.connections_per_host;
|
|
}
|
|
|
|
return downstreamconf.connections_per_frontend;
|
|
}
|
|
} // namespace
|
|
|
|
Http2Upstream::Http2Upstream(ClientHandler *handler)
|
|
: wb_(handler->get_worker()->get_mcpool()),
|
|
downstream_queue_(downstream_queue_size(handler->get_worker()),
|
|
!get_config()->http2_proxy),
|
|
handler_(handler),
|
|
session_(nullptr),
|
|
max_buffer_size_(MAX_BUFFER_SIZE),
|
|
num_requests_(0) {
|
|
int rv;
|
|
|
|
auto config = get_config();
|
|
auto &http2conf = config->http2;
|
|
|
|
auto faddr = handler_->get_upstream_addr();
|
|
|
|
rv = nghttp2_session_server_new2(
|
|
&session_, http2conf.upstream.callbacks, this,
|
|
faddr->alt_mode ? http2conf.upstream.alt_mode_option
|
|
: http2conf.upstream.option);
|
|
|
|
assert(rv == 0);
|
|
|
|
flow_control_ = true;
|
|
|
|
// TODO Maybe call from outside?
|
|
std::array<nghttp2_settings_entry, 3> entry;
|
|
size_t nentry = 2;
|
|
|
|
entry[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
|
|
entry[0].value = http2conf.upstream.max_concurrent_streams;
|
|
|
|
entry[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
|
|
if (faddr->alt_mode) {
|
|
entry[1].value = (1u << 31) - 1;
|
|
} else {
|
|
entry[1].value = http2conf.upstream.window_size;
|
|
}
|
|
|
|
if (http2conf.upstream.decoder_dynamic_table_size !=
|
|
NGHTTP2_DEFAULT_HEADER_TABLE_SIZE) {
|
|
entry[nentry].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
|
|
entry[nentry].value = http2conf.upstream.decoder_dynamic_table_size;
|
|
++nentry;
|
|
}
|
|
|
|
rv = nghttp2_submit_settings(session_, NGHTTP2_FLAG_NONE, entry.data(),
|
|
nentry);
|
|
if (rv != 0) {
|
|
ULOG(ERROR, this) << "nghttp2_submit_settings() returned error: "
|
|
<< nghttp2_strerror(rv);
|
|
}
|
|
|
|
auto window_size =
|
|
faddr->alt_mode
|
|
? std::numeric_limits<int32_t>::max()
|
|
: http2conf.upstream.optimize_window_size
|
|
? std::min(http2conf.upstream.connection_window_size,
|
|
NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE)
|
|
: http2conf.upstream.connection_window_size;
|
|
|
|
rv = nghttp2_session_set_local_window_size(session_, NGHTTP2_FLAG_NONE, 0,
|
|
window_size);
|
|
|
|
if (rv != 0) {
|
|
ULOG(ERROR, this)
|
|
<< "nghttp2_session_set_local_window_size() returned error: "
|
|
<< nghttp2_strerror(rv);
|
|
}
|
|
|
|
// We wait for SETTINGS ACK at least 10 seconds.
|
|
ev_timer_init(&settings_timer_, settings_timeout_cb,
|
|
http2conf.upstream.timeout.settings, 0.);
|
|
|
|
settings_timer_.data = this;
|
|
|
|
// timer for 2nd GOAWAY. HTTP/2 spec recommend 1 RTT. We wait for
|
|
// 2 seconds.
|
|
ev_timer_init(&shutdown_timer_, shutdown_timeout_cb, 2., 0);
|
|
shutdown_timer_.data = this;
|
|
|
|
ev_prepare_init(&prep_, prepare_cb);
|
|
prep_.data = this;
|
|
ev_prepare_start(handler_->get_loop(), &prep_);
|
|
|
|
#if defined(TCP_INFO) && defined(TCP_NOTSENT_LOWAT)
|
|
if (http2conf.upstream.optimize_write_buffer_size) {
|
|
auto conn = handler_->get_connection();
|
|
conn->tls_dyn_rec_warmup_threshold = 0;
|
|
|
|
uint32_t pollout_thres = 1;
|
|
rv = setsockopt(conn->fd, IPPROTO_TCP, TCP_NOTSENT_LOWAT, &pollout_thres,
|
|
static_cast<socklen_t>(sizeof(pollout_thres)));
|
|
|
|
if (rv != 0) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
auto error = errno;
|
|
LOG(INFO) << "setsockopt(TCP_NOTSENT_LOWAT, " << pollout_thres
|
|
<< ") failed: errno=" << error;
|
|
}
|
|
}
|
|
}
|
|
#endif // defined(TCP_INFO) && defined(TCP_NOTSENT_LOWAT)
|
|
|
|
handler_->reset_upstream_read_timeout(
|
|
config->conn.upstream.timeout.http2_read);
|
|
|
|
handler_->signal_write();
|
|
}
|
|
|
|
Http2Upstream::~Http2Upstream() {
|
|
nghttp2_session_del(session_);
|
|
ev_prepare_stop(handler_->get_loop(), &prep_);
|
|
ev_timer_stop(handler_->get_loop(), &shutdown_timer_);
|
|
ev_timer_stop(handler_->get_loop(), &settings_timer_);
|
|
}
|
|
|
|
int Http2Upstream::on_read() {
|
|
ssize_t rv = 0;
|
|
auto rb = handler_->get_rb();
|
|
auto rlimit = handler_->get_rlimit();
|
|
|
|
if (rb->rleft()) {
|
|
rv = nghttp2_session_mem_recv(session_, rb->pos(), rb->rleft());
|
|
if (rv < 0) {
|
|
if (rv != NGHTTP2_ERR_BAD_CLIENT_MAGIC) {
|
|
ULOG(ERROR, this) << "nghttp2_session_mem_recv() returned error: "
|
|
<< nghttp2_strerror(rv);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
// nghttp2_session_mem_recv should consume all input bytes on
|
|
// success.
|
|
assert(static_cast<size_t>(rv) == rb->rleft());
|
|
rb->reset();
|
|
rlimit->startw();
|
|
}
|
|
|
|
if (nghttp2_session_want_read(session_) == 0 &&
|
|
nghttp2_session_want_write(session_) == 0 && wb_.rleft() == 0) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "No more read/write for this HTTP2 session";
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
handler_->signal_write();
|
|
return 0;
|
|
}
|
|
|
|
// After this function call, downstream may be deleted.
|
|
int Http2Upstream::on_write() {
|
|
int rv;
|
|
auto config = get_config();
|
|
auto &http2conf = config->http2;
|
|
|
|
if ((http2conf.upstream.optimize_write_buffer_size ||
|
|
http2conf.upstream.optimize_window_size) &&
|
|
handler_->get_ssl()) {
|
|
auto conn = handler_->get_connection();
|
|
TCPHint hint;
|
|
rv = conn->get_tcp_hint(&hint);
|
|
if (rv == 0) {
|
|
if (http2conf.upstream.optimize_write_buffer_size) {
|
|
max_buffer_size_ = std::min(MAX_BUFFER_SIZE, hint.write_buffer_size);
|
|
}
|
|
|
|
if (http2conf.upstream.optimize_window_size) {
|
|
auto faddr = handler_->get_upstream_addr();
|
|
if (!faddr->alt_mode) {
|
|
auto window_size = std::min(http2conf.upstream.connection_window_size,
|
|
static_cast<int32_t>(hint.rwin * 2));
|
|
|
|
rv = nghttp2_session_set_local_window_size(
|
|
session_, NGHTTP2_FLAG_NONE, 0, window_size);
|
|
if (rv != 0) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this)
|
|
<< "nghttp2_session_set_local_window_size() with window_size="
|
|
<< window_size << " failed: " << nghttp2_strerror(rv);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for (;;) {
|
|
if (wb_.rleft() >= max_buffer_size_) {
|
|
return 0;
|
|
}
|
|
|
|
const uint8_t *data;
|
|
auto datalen = nghttp2_session_mem_send(session_, &data);
|
|
|
|
if (datalen < 0) {
|
|
ULOG(ERROR, this) << "nghttp2_session_mem_send() returned error: "
|
|
<< nghttp2_strerror(datalen);
|
|
return -1;
|
|
}
|
|
if (datalen == 0) {
|
|
break;
|
|
}
|
|
wb_.append(data, datalen);
|
|
}
|
|
|
|
if (nghttp2_session_want_read(session_) == 0 &&
|
|
nghttp2_session_want_write(session_) == 0 && wb_.rleft() == 0) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "No more read/write for this HTTP2 session";
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ClientHandler *Http2Upstream::get_client_handler() const { return handler_; }
|
|
|
|
int Http2Upstream::downstream_read(DownstreamConnection *dconn) {
|
|
auto downstream = dconn->get_downstream();
|
|
|
|
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.
|
|
rst_stream(downstream,
|
|
infer_upstream_rst_stream_error_code(
|
|
downstream->get_response_rst_stream_error_code()));
|
|
downstream->pop_downstream_connection();
|
|
// dconn was deleted
|
|
dconn = nullptr;
|
|
} else if (downstream->get_response_state() == Downstream::MSG_BAD_HEADER) {
|
|
if (error_reply(downstream, 502) != 0) {
|
|
return -1;
|
|
}
|
|
downstream->pop_downstream_connection();
|
|
// dconn was deleted
|
|
dconn = nullptr;
|
|
} else {
|
|
auto rv = downstream->on_read();
|
|
if (rv == SHRPX_ERR_EOF) {
|
|
return downstream_eof(dconn);
|
|
}
|
|
if (rv == SHRPX_ERR_DCONN_CANCELED) {
|
|
downstream->pop_downstream_connection();
|
|
handler_->signal_write();
|
|
return 0;
|
|
}
|
|
if (rv != 0) {
|
|
if (rv != SHRPX_ERR_NETWORK) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
DCLOG(INFO, dconn) << "HTTP parser failure";
|
|
}
|
|
}
|
|
return downstream_error(dconn, Downstream::EVENT_ERROR);
|
|
}
|
|
|
|
if (downstream->can_detach_downstream_connection()) {
|
|
// Keep-alive
|
|
downstream->detach_downstream_connection();
|
|
}
|
|
}
|
|
|
|
handler_->signal_write();
|
|
|
|
// At this point, downstream may be deleted.
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::downstream_write(DownstreamConnection *dconn) {
|
|
int rv;
|
|
rv = dconn->on_write();
|
|
if (rv == SHRPX_ERR_NETWORK) {
|
|
return downstream_error(dconn, Downstream::EVENT_ERROR);
|
|
}
|
|
if (rv != 0) {
|
|
return rv;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::downstream_eof(DownstreamConnection *dconn) {
|
|
auto downstream = dconn->get_downstream();
|
|
|
|
if (LOG_ENABLED(INFO)) {
|
|
DCLOG(INFO, dconn) << "EOF. stream_id=" << downstream->get_stream_id();
|
|
}
|
|
|
|
// Delete downstream connection. If we don't delete it here, it will
|
|
// be pooled in on_stream_close_callback.
|
|
downstream->pop_downstream_connection();
|
|
// dconn was deleted
|
|
dconn = nullptr;
|
|
// 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, this) << "Downstream body was ended by EOF";
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
|
|
// For tunneled connection, MSG_COMPLETE signals
|
|
// downstream_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.
|
|
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 (error_reply(downstream, 502) != 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
handler_->signal_write();
|
|
// At this point, downstream may be deleted.
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::downstream_error(DownstreamConnection *dconn, int events) {
|
|
auto downstream = dconn->get_downstream();
|
|
|
|
if (LOG_ENABLED(INFO)) {
|
|
if (events & Downstream::EVENT_ERROR) {
|
|
DCLOG(INFO, dconn) << "Downstream network/general error";
|
|
} else {
|
|
DCLOG(INFO, dconn) << "Timeout";
|
|
}
|
|
if (downstream->get_upgraded()) {
|
|
DCLOG(INFO, dconn) << "Note: this is tunnel connection";
|
|
}
|
|
}
|
|
|
|
// Delete downstream connection. If we don't delete it here, it will
|
|
// be pooled in on_stream_close_callback.
|
|
downstream->pop_downstream_connection();
|
|
// dconn was deleted
|
|
dconn = nullptr;
|
|
|
|
if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
|
|
// For SSL tunneling, we issue RST_STREAM. For other types of
|
|
// stream, we don't have to do anything since response was
|
|
// complete.
|
|
if (downstream->get_upgraded()) {
|
|
rst_stream(downstream, NGHTTP2_NO_ERROR);
|
|
}
|
|
} else {
|
|
if (downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
|
|
if (downstream->get_upgraded()) {
|
|
on_downstream_body_complete(downstream);
|
|
} else {
|
|
rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
} else {
|
|
unsigned int status;
|
|
if (events & Downstream::EVENT_TIMEOUT) {
|
|
status = 504;
|
|
} else {
|
|
status = 502;
|
|
}
|
|
if (error_reply(downstream, status) != 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
}
|
|
handler_->signal_write();
|
|
// At this point, downstream may be deleted.
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::rst_stream(Downstream *downstream, uint32_t error_code) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "RST_STREAM stream_id=" << downstream->get_stream_id()
|
|
<< " with error_code=" << error_code;
|
|
}
|
|
int rv;
|
|
rv = nghttp2_submit_rst_stream(session_, NGHTTP2_FLAG_NONE,
|
|
downstream->get_stream_id(), error_code);
|
|
if (rv < NGHTTP2_ERR_FATAL) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_rst_stream() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::terminate_session(uint32_t error_code) {
|
|
int rv;
|
|
rv = nghttp2_session_terminate_session(session_, error_code);
|
|
if (rv != 0) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
namespace {
|
|
ssize_t downstream_data_read_callback(nghttp2_session *session,
|
|
int32_t stream_id, uint8_t *buf,
|
|
size_t length, uint32_t *data_flags,
|
|
nghttp2_data_source *source,
|
|
void *user_data) {
|
|
int rv;
|
|
auto downstream = static_cast<Downstream *>(source->ptr);
|
|
auto body = downstream->get_response_buf();
|
|
assert(body);
|
|
auto upstream = static_cast<Http2Upstream *>(user_data);
|
|
|
|
const auto &resp = downstream->response();
|
|
|
|
auto nread = std::min(body->rleft(), length);
|
|
|
|
auto max_buffer_size = upstream->get_max_buffer_size();
|
|
|
|
auto buffer = upstream->get_response_buf();
|
|
|
|
if (max_buffer_size <
|
|
std::min(nread, static_cast<size_t>(256)) + 9 + buffer->rleft()) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, upstream) << "Buffer is almost full. Skip write DATA";
|
|
}
|
|
return NGHTTP2_ERR_PAUSE;
|
|
}
|
|
|
|
nread = std::min(nread, max_buffer_size - 9 - buffer->rleft());
|
|
|
|
auto body_empty = body->rleft() == nread;
|
|
|
|
*data_flags |= NGHTTP2_DATA_FLAG_NO_COPY;
|
|
|
|
if (body_empty &&
|
|
downstream->get_response_state() == Downstream::MSG_COMPLETE) {
|
|
|
|
*data_flags |= NGHTTP2_DATA_FLAG_EOF;
|
|
|
|
if (!downstream->get_upgraded()) {
|
|
const auto &trailers = resp.fs.trailers();
|
|
if (!trailers.empty()) {
|
|
std::vector<nghttp2_nv> nva;
|
|
nva.reserve(trailers.size());
|
|
http2::copy_headers_to_nva_nocopy(nva, trailers, http2::HDOP_STRIP_ALL);
|
|
if (!nva.empty()) {
|
|
rv = nghttp2_submit_trailer(session, stream_id, nva.data(),
|
|
nva.size());
|
|
if (rv != 0) {
|
|
if (nghttp2_is_fatal(rv)) {
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
} else {
|
|
*data_flags |= NGHTTP2_DATA_FLAG_NO_END_STREAM;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (nread == 0 && ((*data_flags) & NGHTTP2_DATA_FLAG_EOF) == 0) {
|
|
downstream->disable_upstream_wtimer();
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
}
|
|
|
|
return nread;
|
|
}
|
|
} // namespace
|
|
|
|
int Http2Upstream::send_reply(Downstream *downstream, const uint8_t *body,
|
|
size_t bodylen) {
|
|
int rv;
|
|
|
|
nghttp2_data_provider data_prd, *data_prd_ptr = nullptr;
|
|
|
|
if (bodylen) {
|
|
data_prd.source.ptr = downstream;
|
|
data_prd.read_callback = downstream_data_read_callback;
|
|
data_prd_ptr = &data_prd;
|
|
}
|
|
|
|
const auto &resp = downstream->response();
|
|
auto config = get_config();
|
|
auto &httpconf = config->http;
|
|
|
|
auto &balloc = downstream->get_block_allocator();
|
|
|
|
const auto &headers = resp.fs.headers();
|
|
auto nva = std::vector<nghttp2_nv>();
|
|
// 2 for :status and server
|
|
nva.reserve(2 + headers.size() + httpconf.add_response_headers.size());
|
|
|
|
auto response_status = http2::stringify_status(balloc, resp.http_status);
|
|
|
|
nva.push_back(http2::make_nv_ls_nocopy(":status", response_status));
|
|
|
|
for (auto &kv : headers) {
|
|
if (kv.name.empty() || kv.name[0] == ':') {
|
|
continue;
|
|
}
|
|
switch (kv.token) {
|
|
case http2::HD_CONNECTION:
|
|
case http2::HD_KEEP_ALIVE:
|
|
case http2::HD_PROXY_CONNECTION:
|
|
case http2::HD_TE:
|
|
case http2::HD_TRANSFER_ENCODING:
|
|
case http2::HD_UPGRADE:
|
|
continue;
|
|
}
|
|
nva.push_back(http2::make_nv_nocopy(kv.name, kv.value, kv.no_index));
|
|
}
|
|
|
|
if (!resp.fs.header(http2::HD_SERVER)) {
|
|
nva.push_back(http2::make_nv_ls_nocopy("server", config->http.server_name));
|
|
}
|
|
|
|
for (auto &p : httpconf.add_response_headers) {
|
|
nva.push_back(http2::make_nv_nocopy(p.name, p.value));
|
|
}
|
|
|
|
rv = nghttp2_submit_response(session_, downstream->get_stream_id(),
|
|
nva.data(), nva.size(), data_prd_ptr);
|
|
if (nghttp2_is_fatal(rv)) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_response() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
return -1;
|
|
}
|
|
|
|
auto buf = downstream->get_response_buf();
|
|
|
|
buf->append(body, bodylen);
|
|
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
|
|
if (data_prd_ptr) {
|
|
downstream->reset_upstream_wtimer();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::error_reply(Downstream *downstream,
|
|
unsigned int status_code) {
|
|
int rv;
|
|
auto &resp = downstream->response();
|
|
|
|
auto &balloc = downstream->get_block_allocator();
|
|
|
|
auto html = http::create_error_html(balloc, status_code);
|
|
resp.http_status = status_code;
|
|
auto body = downstream->get_response_buf();
|
|
body->append(html);
|
|
downstream->set_response_state(Downstream::MSG_COMPLETE);
|
|
|
|
nghttp2_data_provider data_prd;
|
|
data_prd.source.ptr = downstream;
|
|
data_prd.read_callback = downstream_data_read_callback;
|
|
|
|
auto lgconf = log_config();
|
|
lgconf->update_tstamp(std::chrono::system_clock::now());
|
|
|
|
auto response_status = http2::stringify_status(balloc, status_code);
|
|
auto content_length = util::make_string_ref_uint(balloc, html.size());
|
|
auto date = make_string_ref(balloc, lgconf->tstamp->time_http);
|
|
|
|
auto nva = std::array<nghttp2_nv, 5>{
|
|
{http2::make_nv_ls_nocopy(":status", response_status),
|
|
http2::make_nv_ll("content-type", "text/html; charset=UTF-8"),
|
|
http2::make_nv_ls_nocopy("server", get_config()->http.server_name),
|
|
http2::make_nv_ls_nocopy("content-length", content_length),
|
|
http2::make_nv_ls_nocopy("date", date)}};
|
|
|
|
rv = nghttp2_submit_response(session_, downstream->get_stream_id(),
|
|
nva.data(), nva.size(), &data_prd);
|
|
if (rv < NGHTTP2_ERR_FATAL) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_response() failed: "
|
|
<< nghttp2_strerror(rv);
|
|
return -1;
|
|
}
|
|
|
|
downstream->reset_upstream_wtimer();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void Http2Upstream::add_pending_downstream(
|
|
std::unique_ptr<Downstream> downstream) {
|
|
downstream_queue_.add_pending(std::move(downstream));
|
|
}
|
|
|
|
void Http2Upstream::remove_downstream(Downstream *downstream) {
|
|
if (downstream->accesslog_ready()) {
|
|
handler_->write_accesslog(downstream);
|
|
}
|
|
|
|
nghttp2_session_set_stream_user_data(session_, downstream->get_stream_id(),
|
|
nullptr);
|
|
|
|
auto next_downstream = downstream_queue_.remove_and_get_blocked(downstream);
|
|
|
|
if (next_downstream) {
|
|
initiate_downstream(next_downstream);
|
|
}
|
|
|
|
if (downstream_queue_.get_downstreams() == nullptr) {
|
|
// There is no downstream at the moment. Start idle timer now.
|
|
handler_->repeat_read_timer();
|
|
}
|
|
}
|
|
|
|
// 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) {
|
|
int rv;
|
|
|
|
const auto &req = downstream->request();
|
|
auto &resp = downstream->response();
|
|
|
|
auto &balloc = downstream->get_block_allocator();
|
|
|
|
if (LOG_ENABLED(INFO)) {
|
|
if (downstream->get_non_final_response()) {
|
|
DLOG(INFO, downstream) << "HTTP non-final response header";
|
|
} else {
|
|
DLOG(INFO, downstream) << "HTTP response header completed";
|
|
}
|
|
}
|
|
|
|
auto config = get_config();
|
|
auto &httpconf = config->http;
|
|
|
|
if (!config->http2_proxy && !httpconf.no_location_rewrite) {
|
|
downstream->rewrite_location_response_header(req.scheme);
|
|
}
|
|
|
|
#ifdef HAVE_MRUBY
|
|
if (!downstream->get_non_final_response()) {
|
|
auto worker = handler_->get_worker();
|
|
auto mruby_ctx = worker->get_mruby_context();
|
|
|
|
if (mruby_ctx->run_on_response_proc(downstream) != 0) {
|
|
if (error_reply(downstream, 500) != 0) {
|
|
return -1;
|
|
}
|
|
// Returning -1 will signal deletion of dconn.
|
|
return -1;
|
|
}
|
|
|
|
if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
|
|
return -1;
|
|
}
|
|
}
|
|
#endif // HAVE_MRUBY
|
|
|
|
auto &http2conf = config->http2;
|
|
|
|
// We need some conditions that must be fulfilled to initiate server
|
|
// push.
|
|
//
|
|
// * Server push is disabled for http2 proxy or client proxy, since
|
|
// incoming headers are mixed origins. We don't know how to
|
|
// reliably determine the authority yet.
|
|
//
|
|
// * We need non-final response or 200 response code for associated
|
|
// resource. This is too restrictive, we will review this later.
|
|
//
|
|
// * We requires GET or POST for associated resource. Probably we
|
|
// don't want to push for HEAD request. Not sure other methods
|
|
// are also eligible for push.
|
|
if (!http2conf.no_server_push &&
|
|
nghttp2_session_get_remote_settings(session_,
|
|
NGHTTP2_SETTINGS_ENABLE_PUSH) == 1 &&
|
|
!config->http2_proxy && (downstream->get_stream_id() % 2) &&
|
|
resp.fs.header(http2::HD_LINK) &&
|
|
(downstream->get_non_final_response() || resp.http_status == 200) &&
|
|
(req.method == HTTP_GET || req.method == HTTP_POST)) {
|
|
|
|
if (prepare_push_promise(downstream) != 0) {
|
|
// Continue to send response even if push was failed.
|
|
}
|
|
}
|
|
|
|
auto nva = std::vector<nghttp2_nv>();
|
|
// 4 means :status and possible server, via and x-http2-push header
|
|
// field.
|
|
nva.reserve(resp.fs.headers().size() + 4 +
|
|
httpconf.add_response_headers.size());
|
|
|
|
auto response_status = http2::stringify_status(balloc, resp.http_status);
|
|
|
|
nva.push_back(http2::make_nv_ls_nocopy(":status", response_status));
|
|
|
|
if (downstream->get_non_final_response()) {
|
|
http2::copy_headers_to_nva_nocopy(nva, resp.fs.headers(),
|
|
http2::HDOP_STRIP_ALL);
|
|
|
|
if (LOG_ENABLED(INFO)) {
|
|
log_response_headers(downstream, nva);
|
|
}
|
|
|
|
rv = nghttp2_submit_headers(session_, NGHTTP2_FLAG_NONE,
|
|
downstream->get_stream_id(), nullptr,
|
|
nva.data(), nva.size(), nullptr);
|
|
|
|
resp.fs.clear_headers();
|
|
|
|
if (rv != 0) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_headers() failed";
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
http2::copy_headers_to_nva_nocopy(
|
|
nva, resp.fs.headers(), http2::HDOP_STRIP_ALL & ~http2::HDOP_STRIP_VIA);
|
|
|
|
if (!config->http2_proxy && !httpconf.no_server_rewrite) {
|
|
nva.push_back(http2::make_nv_ls_nocopy("server", httpconf.server_name));
|
|
} else {
|
|
auto server = resp.fs.header(http2::HD_SERVER);
|
|
if (server) {
|
|
nva.push_back(http2::make_nv_ls_nocopy("server", (*server).value));
|
|
}
|
|
}
|
|
|
|
auto via = resp.fs.header(http2::HD_VIA);
|
|
if (httpconf.no_via) {
|
|
if (via) {
|
|
nva.push_back(http2::make_nv_ls_nocopy("via", (*via).value));
|
|
}
|
|
} else {
|
|
// we don't create more than 16 bytes in
|
|
// http::create_via_header_value.
|
|
size_t len = 16;
|
|
if (via) {
|
|
len += via->value.size() + 2;
|
|
}
|
|
|
|
auto iov = make_byte_ref(balloc, len + 1);
|
|
auto p = iov.base;
|
|
if (via) {
|
|
p = std::copy(std::begin(via->value), std::end(via->value), p);
|
|
p = util::copy_lit(p, ", ");
|
|
}
|
|
p = http::create_via_header_value(p, resp.http_major, resp.http_minor);
|
|
*p = '\0';
|
|
|
|
nva.push_back(http2::make_nv_ls_nocopy("via", StringRef{iov.base, p}));
|
|
}
|
|
|
|
for (auto &p : httpconf.add_response_headers) {
|
|
nva.push_back(http2::make_nv_nocopy(p.name, p.value));
|
|
}
|
|
|
|
if (downstream->get_stream_id() % 2 == 0) {
|
|
// This header field is basically for human on client side to
|
|
// figure out that the resource is pushed.
|
|
nva.push_back(http2::make_nv_ll("x-http2-push", "1"));
|
|
}
|
|
|
|
if (LOG_ENABLED(INFO)) {
|
|
log_response_headers(downstream, nva);
|
|
}
|
|
|
|
if (http2conf.upstream.debug.dump.response_header) {
|
|
http2::dump_nv(http2conf.upstream.debug.dump.response_header, nva.data(),
|
|
nva.size());
|
|
}
|
|
|
|
nghttp2_data_provider data_prd;
|
|
data_prd.source.ptr = downstream;
|
|
data_prd.read_callback = downstream_data_read_callback;
|
|
|
|
nghttp2_data_provider *data_prdptr;
|
|
|
|
if (downstream->expect_response_body() ||
|
|
downstream->expect_response_trailer()) {
|
|
data_prdptr = &data_prd;
|
|
} else {
|
|
data_prdptr = nullptr;
|
|
}
|
|
|
|
rv = nghttp2_submit_response(session_, downstream->get_stream_id(),
|
|
nva.data(), nva.size(), data_prdptr);
|
|
if (rv != 0) {
|
|
ULOG(FATAL, this) << "nghttp2_submit_response() failed";
|
|
return -1;
|
|
}
|
|
|
|
if (data_prdptr) {
|
|
downstream->reset_upstream_wtimer();
|
|
}
|
|
|
|
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,
|
|
bool flush) {
|
|
auto body = downstream->get_response_buf();
|
|
body->append(data, len);
|
|
|
|
if (flush) {
|
|
nghttp2_session_resume_data(session_, downstream->get_stream_id());
|
|
|
|
downstream->ensure_upstream_wtimer();
|
|
}
|
|
|
|
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";
|
|
}
|
|
|
|
auto &resp = downstream->response();
|
|
|
|
if (!downstream->validate_response_recv_body_length()) {
|
|
rst_stream(downstream, NGHTTP2_PROTOCOL_ERROR);
|
|
resp.connection_close = true;
|
|
return 0;
|
|
}
|
|
|
|
nghttp2_session_resume_data(session_, downstream->get_stream_id());
|
|
downstream->ensure_upstream_wtimer();
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool Http2Upstream::get_flow_control() const { return flow_control_; }
|
|
|
|
void Http2Upstream::pause_read(IOCtrlReason reason) {}
|
|
|
|
int Http2Upstream::resume_read(IOCtrlReason reason, Downstream *downstream,
|
|
size_t consumed) {
|
|
if (get_flow_control()) {
|
|
if (consume(downstream->get_stream_id(), consumed) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
auto &req = downstream->request();
|
|
|
|
req.consume(consumed);
|
|
}
|
|
|
|
handler_->signal_write();
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::on_downstream_abort_request(Downstream *downstream,
|
|
unsigned int status_code) {
|
|
int rv;
|
|
|
|
rv = error_reply(downstream, status_code);
|
|
|
|
if (rv != 0) {
|
|
return -1;
|
|
}
|
|
|
|
handler_->signal_write();
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::on_downstream_abort_request_with_https_redirect(
|
|
Downstream *downstream) {
|
|
int rv;
|
|
|
|
rv = redirect_to_https(downstream);
|
|
if (rv != 0) {
|
|
return -1;
|
|
}
|
|
|
|
handler_->signal_write();
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::redirect_to_https(Downstream *downstream) {
|
|
auto &req = downstream->request();
|
|
if (req.method == HTTP_CONNECT || req.scheme != "http") {
|
|
return error_reply(downstream, 400);
|
|
}
|
|
|
|
auto authority = util::extract_host(req.authority);
|
|
if (authority.empty()) {
|
|
return error_reply(downstream, 400);
|
|
}
|
|
|
|
auto &balloc = downstream->get_block_allocator();
|
|
auto config = get_config();
|
|
auto &httpconf = config->http;
|
|
|
|
StringRef loc;
|
|
if (httpconf.redirect_https_port == StringRef::from_lit("443")) {
|
|
loc = concat_string_ref(balloc, StringRef::from_lit("https://"), authority,
|
|
req.path);
|
|
} else {
|
|
loc = concat_string_ref(balloc, StringRef::from_lit("https://"), authority,
|
|
StringRef::from_lit(":"),
|
|
httpconf.redirect_https_port, req.path);
|
|
}
|
|
|
|
auto &resp = downstream->response();
|
|
resp.http_status = 308;
|
|
resp.fs.add_header_token(StringRef::from_lit("location"), loc, false,
|
|
http2::HD_LOCATION);
|
|
|
|
return send_reply(downstream, nullptr, 0);
|
|
}
|
|
|
|
int Http2Upstream::consume(int32_t stream_id, size_t len) {
|
|
int rv;
|
|
|
|
auto faddr = handler_->get_upstream_addr();
|
|
|
|
if (faddr->alt_mode) {
|
|
return 0;
|
|
}
|
|
|
|
rv = nghttp2_session_consume(session_, stream_id, len);
|
|
|
|
if (rv != 0) {
|
|
ULOG(WARN, this) << "nghttp2_session_consume() returned error: "
|
|
<< nghttp2_strerror(rv);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void Http2Upstream::log_response_headers(
|
|
Downstream *downstream, const std::vector<nghttp2_nv> &nva) const {
|
|
std::stringstream ss;
|
|
for (auto &nv : nva) {
|
|
ss << TTY_HTTP_HD << StringRef{nv.name, nv.namelen} << TTY_RST << ": "
|
|
<< StringRef{nv.value, nv.valuelen} << "\n";
|
|
}
|
|
ULOG(INFO, this) << "HTTP response headers. stream_id="
|
|
<< downstream->get_stream_id() << "\n"
|
|
<< ss.str();
|
|
}
|
|
|
|
int Http2Upstream::on_timeout(Downstream *downstream) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "Stream timeout stream_id="
|
|
<< downstream->get_stream_id();
|
|
}
|
|
|
|
rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
handler_->signal_write();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void Http2Upstream::on_handler_delete() {
|
|
for (auto d = downstream_queue_.get_downstreams(); d; d = d->dlnext) {
|
|
if (d->get_dispatch_state() == Downstream::DISPATCH_ACTIVE &&
|
|
d->accesslog_ready()) {
|
|
handler_->write_accesslog(d);
|
|
}
|
|
}
|
|
}
|
|
|
|
int Http2Upstream::on_downstream_reset(Downstream *downstream, bool no_retry) {
|
|
int rv;
|
|
|
|
if (downstream->get_dispatch_state() != Downstream::DISPATCH_ACTIVE) {
|
|
// This is error condition when we failed push_request_headers()
|
|
// in initiate_downstream(). Otherwise, we have
|
|
// Downstream::DISPATCH_ACTIVE state, or we did not set
|
|
// DownstreamConnection.
|
|
downstream->pop_downstream_connection();
|
|
handler_->signal_write();
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (!downstream->request_submission_ready()) {
|
|
if (downstream->get_response_state() == Downstream::MSG_COMPLETE) {
|
|
// We have got all response body already. Send it off.
|
|
downstream->pop_downstream_connection();
|
|
return 0;
|
|
}
|
|
// pushed stream is handled here
|
|
rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
downstream->pop_downstream_connection();
|
|
|
|
handler_->signal_write();
|
|
|
|
return 0;
|
|
}
|
|
|
|
downstream->pop_downstream_connection();
|
|
|
|
downstream->add_retry();
|
|
|
|
std::unique_ptr<DownstreamConnection> dconn;
|
|
|
|
rv = 0;
|
|
|
|
if (no_retry || downstream->no_more_retry()) {
|
|
goto fail;
|
|
}
|
|
|
|
// downstream connection is clean; we can retry with new
|
|
// downstream connection.
|
|
|
|
dconn = handler_->get_downstream_connection(rv, downstream);
|
|
if (!dconn) {
|
|
goto fail;
|
|
}
|
|
|
|
rv = downstream->attach_downstream_connection(std::move(dconn));
|
|
if (rv != 0) {
|
|
goto fail;
|
|
}
|
|
|
|
rv = downstream->push_request_headers();
|
|
if (rv != 0) {
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (rv == SHRPX_ERR_TLS_REQUIRED) {
|
|
rv = on_downstream_abort_request_with_https_redirect(downstream);
|
|
} else {
|
|
rv = on_downstream_abort_request(downstream, 502);
|
|
}
|
|
if (rv != 0) {
|
|
rst_stream(downstream, NGHTTP2_INTERNAL_ERROR);
|
|
}
|
|
downstream->pop_downstream_connection();
|
|
|
|
handler_->signal_write();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::prepare_push_promise(Downstream *downstream) {
|
|
int rv;
|
|
|
|
const auto &req = downstream->request();
|
|
const auto &resp = downstream->response();
|
|
|
|
auto base = http2::get_pure_path_component(req.path);
|
|
if (base.empty()) {
|
|
return 0;
|
|
}
|
|
|
|
auto &balloc = downstream->get_block_allocator();
|
|
|
|
for (auto &kv : resp.fs.headers()) {
|
|
if (kv.token != http2::HD_LINK) {
|
|
continue;
|
|
}
|
|
for (auto &link : http2::parse_link_header(kv.value)) {
|
|
StringRef scheme, authority, path;
|
|
|
|
rv = http2::construct_push_component(balloc, scheme, authority, path,
|
|
base, link.uri);
|
|
if (rv != 0) {
|
|
continue;
|
|
}
|
|
|
|
if (scheme.empty()) {
|
|
scheme = req.scheme;
|
|
}
|
|
|
|
if (authority.empty()) {
|
|
authority = req.authority;
|
|
}
|
|
|
|
rv = submit_push_promise(scheme, authority, path, downstream);
|
|
if (rv != 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::submit_push_promise(const StringRef &scheme,
|
|
const StringRef &authority,
|
|
const StringRef &path,
|
|
Downstream *downstream) {
|
|
const auto &req = downstream->request();
|
|
|
|
std::vector<nghttp2_nv> nva;
|
|
// 4 for :method, :scheme, :path and :authority
|
|
nva.reserve(4 + req.fs.headers().size());
|
|
|
|
// juse use "GET" for now
|
|
nva.push_back(http2::make_nv_ll(":method", "GET"));
|
|
nva.push_back(http2::make_nv_ls_nocopy(":scheme", scheme));
|
|
nva.push_back(http2::make_nv_ls_nocopy(":path", path));
|
|
nva.push_back(http2::make_nv_ls_nocopy(":authority", authority));
|
|
|
|
for (auto &kv : req.fs.headers()) {
|
|
switch (kv.token) {
|
|
// TODO generate referer
|
|
case http2::HD__AUTHORITY:
|
|
case http2::HD__SCHEME:
|
|
case http2::HD__METHOD:
|
|
case http2::HD__PATH:
|
|
continue;
|
|
case http2::HD_ACCEPT_ENCODING:
|
|
case http2::HD_ACCEPT_LANGUAGE:
|
|
case http2::HD_CACHE_CONTROL:
|
|
case http2::HD_HOST:
|
|
case http2::HD_USER_AGENT:
|
|
nva.push_back(http2::make_nv_nocopy(kv.name, kv.value, kv.no_index));
|
|
break;
|
|
}
|
|
}
|
|
|
|
auto promised_stream_id = nghttp2_submit_push_promise(
|
|
session_, NGHTTP2_FLAG_NONE, downstream->get_stream_id(), nva.data(),
|
|
nva.size(), nullptr);
|
|
|
|
if (promised_stream_id < 0) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "nghttp2_submit_push_promise() failed: "
|
|
<< nghttp2_strerror(promised_stream_id);
|
|
}
|
|
if (nghttp2_is_fatal(promised_stream_id)) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (LOG_ENABLED(INFO)) {
|
|
std::stringstream ss;
|
|
for (auto &nv : nva) {
|
|
ss << TTY_HTTP_HD << StringRef{nv.name, nv.namelen} << TTY_RST << ": "
|
|
<< StringRef{nv.value, nv.valuelen} << "\n";
|
|
}
|
|
ULOG(INFO, this) << "HTTP push request headers. promised_stream_id="
|
|
<< promised_stream_id << "\n"
|
|
<< ss.str();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool Http2Upstream::push_enabled() const {
|
|
auto config = get_config();
|
|
return !(config->http2.no_server_push ||
|
|
nghttp2_session_get_remote_settings(
|
|
session_, NGHTTP2_SETTINGS_ENABLE_PUSH) == 0 ||
|
|
config->http2_proxy);
|
|
}
|
|
|
|
int Http2Upstream::initiate_push(Downstream *downstream, const StringRef &uri) {
|
|
int rv;
|
|
|
|
if (uri.empty() || !push_enabled() ||
|
|
(downstream->get_stream_id() % 2) == 0) {
|
|
return 0;
|
|
}
|
|
|
|
const auto &req = downstream->request();
|
|
|
|
auto base = http2::get_pure_path_component(req.path);
|
|
if (base.empty()) {
|
|
return -1;
|
|
}
|
|
|
|
auto &balloc = downstream->get_block_allocator();
|
|
|
|
StringRef scheme, authority, path;
|
|
|
|
rv = http2::construct_push_component(balloc, scheme, authority, path, base,
|
|
uri);
|
|
if (rv != 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (scheme.empty()) {
|
|
scheme = req.scheme;
|
|
}
|
|
|
|
if (authority.empty()) {
|
|
authority = req.authority;
|
|
}
|
|
|
|
rv = submit_push_promise(scheme, authority, path, downstream);
|
|
|
|
if (rv != 0) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Http2Upstream::response_riovec(struct iovec *iov, int iovcnt) const {
|
|
if (iovcnt == 0 || wb_.rleft() == 0) {
|
|
return 0;
|
|
}
|
|
|
|
return wb_.riovec(iov, iovcnt);
|
|
}
|
|
|
|
void Http2Upstream::response_drain(size_t n) { wb_.drain(n); }
|
|
|
|
bool Http2Upstream::response_empty() const { return wb_.rleft() == 0; }
|
|
|
|
DefaultMemchunks *Http2Upstream::get_response_buf() { return &wb_; }
|
|
|
|
Downstream *
|
|
Http2Upstream::on_downstream_push_promise(Downstream *downstream,
|
|
int32_t promised_stream_id) {
|
|
// promised_stream_id is for backend HTTP/2 session, not for
|
|
// frontend.
|
|
auto promised_downstream =
|
|
make_unique<Downstream>(this, handler_->get_mcpool(), 0);
|
|
auto &promised_req = promised_downstream->request();
|
|
|
|
promised_downstream->set_downstream_stream_id(promised_stream_id);
|
|
// Set associated stream in frontend
|
|
promised_downstream->set_assoc_stream_id(downstream->get_stream_id());
|
|
|
|
promised_downstream->disable_upstream_rtimer();
|
|
|
|
promised_req.http_major = 2;
|
|
promised_req.http_minor = 0;
|
|
|
|
promised_req.fs.content_length = 0;
|
|
promised_req.http2_expect_body = false;
|
|
|
|
auto ptr = promised_downstream.get();
|
|
add_pending_downstream(std::move(promised_downstream));
|
|
downstream_queue_.mark_active(ptr);
|
|
|
|
return ptr;
|
|
}
|
|
|
|
int Http2Upstream::on_downstream_push_promise_complete(
|
|
Downstream *downstream, Downstream *promised_downstream) {
|
|
std::vector<nghttp2_nv> nva;
|
|
|
|
const auto &promised_req = promised_downstream->request();
|
|
const auto &headers = promised_req.fs.headers();
|
|
|
|
nva.reserve(headers.size());
|
|
|
|
for (auto &kv : headers) {
|
|
nva.push_back(http2::make_nv(kv.name, kv.value, kv.no_index));
|
|
}
|
|
|
|
auto promised_stream_id = nghttp2_submit_push_promise(
|
|
session_, NGHTTP2_FLAG_NONE, downstream->get_stream_id(), nva.data(),
|
|
nva.size(), promised_downstream);
|
|
if (promised_stream_id < 0) {
|
|
return -1;
|
|
}
|
|
|
|
promised_downstream->set_stream_id(promised_stream_id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void Http2Upstream::cancel_premature_downstream(
|
|
Downstream *promised_downstream) {
|
|
if (LOG_ENABLED(INFO)) {
|
|
ULOG(INFO, this) << "Remove premature promised stream "
|
|
<< promised_downstream;
|
|
}
|
|
downstream_queue_.remove_and_get_blocked(promised_downstream, false);
|
|
}
|
|
|
|
size_t Http2Upstream::get_max_buffer_size() const { return max_buffer_size_; }
|
|
|
|
} // namespace shrpx
|