314 lines
9.0 KiB
C++
314 lines
9.0 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2014 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 "h2load_http2_session.h"
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#include <cassert>
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#include <cerrno>
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#include <iostream>
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#include "h2load.h"
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#include "util.h"
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#include "template.h"
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using namespace nghttp2;
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namespace h2load {
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Http2Session::Http2Session(Client *client)
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: client_(client), session_(nullptr) {}
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Http2Session::~Http2Session() { nghttp2_session_del(session_); }
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namespace {
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int on_header_callback(nghttp2_session *session, const nghttp2_frame *frame,
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const uint8_t *name, size_t namelen,
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const uint8_t *value, size_t valuelen, uint8_t flags,
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void *user_data) {
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auto client = static_cast<Client *>(user_data);
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if (frame->hd.type != NGHTTP2_HEADERS ||
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frame->headers.cat != NGHTTP2_HCAT_RESPONSE) {
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return 0;
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}
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client->on_header(frame->hd.stream_id, name, namelen, value, valuelen);
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client->worker->stats.bytes_head_decomp += namelen + valuelen;
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if (client->worker->config->verbose) {
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std::cout << "[stream_id=" << frame->hd.stream_id << "] ";
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std::cout.write(reinterpret_cast<const char *>(name), namelen);
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std::cout << ": ";
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std::cout.write(reinterpret_cast<const char *>(value), valuelen);
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std::cout << "\n";
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}
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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_frame_recv_callback(nghttp2_session *session, const nghttp2_frame *frame,
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void *user_data) {
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auto client = static_cast<Client *>(user_data);
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if (frame->hd.type != NGHTTP2_HEADERS ||
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frame->headers.cat != NGHTTP2_HCAT_RESPONSE) {
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return 0;
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}
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client->worker->stats.bytes_head +=
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frame->hd.length - frame->headers.padlen -
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((frame->hd.flags & NGHTTP2_FLAG_PRIORITY) ? 5 : 0);
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if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
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client->record_ttfb();
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}
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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_data_chunk_recv_callback(nghttp2_session *session, uint8_t flags,
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int32_t stream_id, const uint8_t *data,
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size_t len, void *user_data) {
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auto client = static_cast<Client *>(user_data);
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client->record_ttfb();
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client->worker->stats.bytes_body += len;
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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_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 client = static_cast<Client *>(user_data);
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client->on_stream_close(stream_id, error_code == NGHTTP2_NO_ERROR);
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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 before_frame_send_callback(nghttp2_session *session,
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const nghttp2_frame *frame, void *user_data) {
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if (frame->hd.type != NGHTTP2_HEADERS ||
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frame->headers.cat != NGHTTP2_HCAT_REQUEST) {
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return 0;
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}
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auto client = static_cast<Client *>(user_data);
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auto req_stat = client->get_req_stat(frame->hd.stream_id);
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assert(req_stat);
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client->record_request_time(req_stat);
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return 0;
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}
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} // namespace
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namespace {
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ssize_t file_read_callback(nghttp2_session *session, int32_t stream_id,
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uint8_t *buf, size_t length, uint32_t *data_flags,
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nghttp2_data_source *source, void *user_data) {
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auto client = static_cast<Client *>(user_data);
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auto config = client->worker->config;
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auto req_stat = client->get_req_stat(stream_id);
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assert(req_stat);
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ssize_t nread;
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while ((nread = pread(config->data_fd, buf, length, req_stat->data_offset)) ==
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-1 &&
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errno == EINTR)
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;
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if (nread == -1) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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req_stat->data_offset += nread;
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if (req_stat->data_offset == config->data_length) {
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*data_flags |= NGHTTP2_DATA_FLAG_EOF;
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return nread;
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}
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if (req_stat->data_offset > config->data_length || nread == 0) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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return nread;
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}
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} // namespace
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namespace {
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ssize_t send_callback(nghttp2_session *session, const uint8_t *data,
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size_t length, int flags, void *user_data) {
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auto client = static_cast<Client *>(user_data);
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auto &wb = client->wb;
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if (wb.rleft() >= BACKOFF_WRITE_BUFFER_THRES) {
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return NGHTTP2_ERR_WOULDBLOCK;
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}
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return wb.append(data, length);
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}
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} // namespace
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void Http2Session::on_connect() {
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int rv;
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// This is required with --disable-assert.
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(void)rv;
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nghttp2_session_callbacks *callbacks;
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nghttp2_session_callbacks_new(&callbacks);
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auto callbacks_deleter = defer(nghttp2_session_callbacks_del, callbacks);
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nghttp2_session_callbacks_set_on_frame_recv_callback(callbacks,
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on_frame_recv_callback);
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nghttp2_session_callbacks_set_on_data_chunk_recv_callback(
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callbacks, on_data_chunk_recv_callback);
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nghttp2_session_callbacks_set_on_stream_close_callback(
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callbacks, on_stream_close_callback);
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nghttp2_session_callbacks_set_on_header_callback(callbacks,
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on_header_callback);
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nghttp2_session_callbacks_set_before_frame_send_callback(
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callbacks, before_frame_send_callback);
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nghttp2_session_callbacks_set_send_callback(callbacks, send_callback);
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nghttp2_option *opt;
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rv = nghttp2_option_new(&opt);
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assert(rv == 0);
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auto config = client_->worker->config;
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if (config->encoder_header_table_size != NGHTTP2_DEFAULT_HEADER_TABLE_SIZE) {
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nghttp2_option_set_max_deflate_dynamic_table_size(
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opt, config->encoder_header_table_size);
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}
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nghttp2_session_client_new2(&session_, callbacks, client_, opt);
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nghttp2_option_del(opt);
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std::array<nghttp2_settings_entry, 4> iv;
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size_t niv = 2;
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iv[0].settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
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iv[0].value = 0;
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iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
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iv[1].value = (1 << config->window_bits) - 1;
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if (config->header_table_size != NGHTTP2_DEFAULT_HEADER_TABLE_SIZE) {
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iv[niv].settings_id = NGHTTP2_SETTINGS_HEADER_TABLE_SIZE;
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iv[niv].value = config->header_table_size;
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++niv;
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}
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if (config->max_frame_size != 16_k) {
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iv[niv].settings_id = NGHTTP2_SETTINGS_MAX_FRAME_SIZE;
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iv[niv].value = config->max_frame_size;
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++niv;
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}
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rv = nghttp2_submit_settings(session_, NGHTTP2_FLAG_NONE, iv.data(), niv);
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assert(rv == 0);
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auto connection_window = (1 << config->connection_window_bits) - 1;
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nghttp2_session_set_local_window_size(session_, NGHTTP2_FLAG_NONE, 0,
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connection_window);
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client_->signal_write();
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}
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int Http2Session::submit_request() {
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if (nghttp2_session_check_request_allowed(session_) == 0) {
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return -1;
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}
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auto config = client_->worker->config;
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auto &nva = config->nva[client_->reqidx++];
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if (client_->reqidx == config->nva.size()) {
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client_->reqidx = 0;
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}
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nghttp2_data_provider prd{{0}, file_read_callback};
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auto stream_id =
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nghttp2_submit_request(session_, nullptr, nva.data(), nva.size(),
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config->data_fd == -1 ? nullptr : &prd, nullptr);
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if (stream_id < 0) {
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return -1;
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}
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client_->on_request(stream_id);
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return 0;
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}
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int Http2Session::on_read(const uint8_t *data, size_t len) {
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auto rv = nghttp2_session_mem_recv(session_, data, len);
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if (rv < 0) {
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return -1;
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}
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assert(static_cast<size_t>(rv) == len);
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if (nghttp2_session_want_read(session_) == 0 &&
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nghttp2_session_want_write(session_) == 0 && client_->wb.rleft() == 0) {
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return -1;
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}
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client_->signal_write();
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return 0;
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}
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int Http2Session::on_write() {
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auto rv = nghttp2_session_send(session_);
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if (rv != 0) {
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return -1;
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}
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if (nghttp2_session_want_read(session_) == 0 &&
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nghttp2_session_want_write(session_) == 0 && client_->wb.rleft() == 0) {
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return -1;
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}
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return 0;
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}
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void Http2Session::terminate() {
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nghttp2_session_terminate_session(session_, NGHTTP2_NO_ERROR);
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}
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size_t Http2Session::max_concurrent_streams() {
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return (size_t)client_->worker->config->max_concurrent_streams;
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}
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} // namespace h2load
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