591 lines
18 KiB
C++
591 lines
18 KiB
C++
/*
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* Spdylay - SPDY Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "shrpx_https_upstream.h"
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#include <cassert>
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#include <set>
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#include "shrpx_client_handler.h"
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#include "shrpx_downstream.h"
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#include "shrpx_downstream_connection.h"
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#include "shrpx_http.h"
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#include "shrpx_config.h"
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#include "shrpx_error.h"
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#include "util.h"
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using namespace spdylay;
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namespace shrpx {
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namespace {
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const size_t SHRPX_HTTPS_UPSTREAM_OUTPUT_UPPER_THRES = 64*1024;
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const size_t SHRPX_HTTPS_MAX_HEADER_LENGTH = 64*1024;
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} // namespace
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HttpsUpstream::HttpsUpstream(ClientHandler *handler)
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: handler_(handler),
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htp_(htparser_new()),
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current_header_length_(0),
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ioctrl_(handler->get_bev())
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{
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htparser_init(htp_, htp_type_request);
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htparser_set_userdata(htp_, this);
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}
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HttpsUpstream::~HttpsUpstream()
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{
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free(htp_);
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for(std::deque<Downstream*>::iterator i = downstream_queue_.begin();
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i != downstream_queue_.end(); ++i) {
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delete *i;
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}
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}
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void HttpsUpstream::reset_current_header_length()
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{
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current_header_length_ = 0;
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}
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namespace {
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int htp_msg_begin(htparser *htp)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "Upstream https request start";
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}
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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upstream->reset_current_header_length();
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Downstream *downstream = new Downstream(upstream, 0, 0);
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upstream->add_downstream(downstream);
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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 htp_methodcb(htparser *htp, const char *data, size_t len)
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{
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->set_request_method(std::string(data, 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 htp_uricb(htparser *htp, const char *data, size_t len)
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{
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->set_request_path(std::string(data, 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 htp_hdrs_begincb(htparser *htp)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "Upstream https request headers start";
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}
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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int version = htparser_get_major(htp)*100 + htparser_get_minor(htp);
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if(version < 101) {
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downstream->set_request_connection_close(true);
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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 htp_hdr_keycb(htparser *htp, const char *data, size_t len)
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{
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->add_request_header(std::string(data, 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 htp_hdr_valcb(htparser *htp, const char *data, size_t len)
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{
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->set_last_request_header_value(std::string(data, 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 htp_hdrs_completecb(htparser *htp)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "Upstream https request headers complete";
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}
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->set_request_major(htparser_get_major(htp));
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downstream->set_request_minor(htparser_get_minor(htp));
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DownstreamConnection *dconn;
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dconn = upstream->get_client_handler()->get_downstream_connection();
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int rv = dconn->attach_downstream(downstream);
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if(rv != 0) {
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downstream->set_request_state(Downstream::CONNECT_FAIL);
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downstream->set_downstream_connection(0);
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delete dconn;
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return 1;
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} else {
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downstream->push_request_headers();
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downstream->set_request_state(Downstream::HEADER_COMPLETE);
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return 0;
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}
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}
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} // namespace
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namespace {
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int htp_bodycb(htparser *htp, const char *data, size_t len)
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{
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->push_upload_data_chunk(reinterpret_cast<const uint8_t*>(data),
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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 htp_msg_completecb(htparser *htp)
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{
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if(ENABLE_LOG) {
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LOG(INFO) << "Upstream https request complete";
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}
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HttpsUpstream *upstream;
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upstream = reinterpret_cast<HttpsUpstream*>(htparser_get_userdata(htp));
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Downstream *downstream = upstream->get_last_downstream();
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downstream->end_upload_data();
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downstream->set_request_state(Downstream::MSG_COMPLETE);
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// Stop further processing to complete this request
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return 1;
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}
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} // namespace
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namespace {
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htparse_hooks htp_hooks = {
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htp_msg_begin, /*htparse_hook on_msg_begin;*/
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htp_methodcb, /*htparse_data_hook method;*/
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0, /* htparse_data_hook scheme;*/
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0, /* htparse_data_hook host; */
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0, /* htparse_data_hook port; */
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0, /* htparse_data_hook path; */
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0, /* htparse_data_hook args; */
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htp_uricb, /* htparse_data_hook uri; */
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htp_hdrs_begincb, /* htparse_hook on_hdrs_begin; */
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htp_hdr_keycb, /* htparse_data_hook hdr_key; */
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htp_hdr_valcb, /* htparse_data_hook hdr_val; */
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htp_hdrs_completecb, /* htparse_hook on_hdrs_complete; */
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0, /*htparse_hook on_new_chunk;*/
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0, /*htparse_hook on_chunk_complete;*/
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0, /*htparse_hook on_chunks_complete;*/
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htp_bodycb, /* htparse_data_hook body; */
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htp_msg_completecb /* htparse_hook on_msg_complete;*/
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};
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} // namespace
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// on_read() does not consume all available data in input buffer if
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// one http request is fully received.
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int HttpsUpstream::on_read()
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{
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bufferevent *bev = handler_->get_bev();
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evbuffer *input = bufferevent_get_input(bev);
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unsigned char *mem = evbuffer_pullup(input, -1);
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int nread = htparser_run(htp_, &htp_hooks,
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reinterpret_cast<const char*>(mem),
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evbuffer_get_length(input));
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evbuffer_drain(input, nread);
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// Well, actually header length + some body bytes
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current_header_length_ += nread;
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htpparse_error htperr = htparser_get_error(htp_);
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Downstream *downstream = get_top_downstream();
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if(htperr == htparse_error_user) {
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if(downstream->get_request_state() == Downstream::CONNECT_FAIL) {
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get_client_handler()->set_should_close_after_write(true);
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error_reply(503);
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// Downstream gets deleted after response body is read.
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} else {
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assert(downstream->get_request_state() == Downstream::MSG_COMPLETE);
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if(downstream->get_downstream_connection() == 0) {
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// Error response already be sent
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assert(downstream->get_response_state() == Downstream::MSG_COMPLETE);
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pop_downstream();
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delete downstream;
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} else {
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pause_read(SHRPX_MSG_BLOCK);
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}
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}
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} else if(htperr == htparse_error_none) {
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// downstream can be NULL here.
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if(downstream) {
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if(downstream->get_request_state() == Downstream::INITIAL &&
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current_header_length_ > SHRPX_HTTPS_MAX_HEADER_LENGTH) {
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LOG(WARNING) << "Request Header too long:" << current_header_length_
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<< " bytes";
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get_client_handler()->set_should_close_after_write(true);
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error_reply(400);
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} else if(downstream->get_output_buffer_full()) {
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if(ENABLE_LOG) {
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LOG(INFO) << "Downstream output buffer is full";
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}
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pause_read(SHRPX_NO_BUFFER);
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}
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}
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} else {
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if(ENABLE_LOG) {
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LOG(INFO) << "Upstream http parse failure: "
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<< htparser_get_strerror(htp_);
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}
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get_client_handler()->set_should_close_after_write(true);
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error_reply(400);
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}
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return 0;
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}
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namespace {
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void https_downstream_readcb(bufferevent *bev, void *ptr);
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} // namespace
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int HttpsUpstream::on_write()
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{
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Downstream *downstream = get_top_downstream();
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if(downstream) {
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downstream->resume_read(SHRPX_NO_BUFFER);
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}
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return 0;
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}
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int HttpsUpstream::on_event()
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{
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return 0;
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}
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ClientHandler* HttpsUpstream::get_client_handler() const
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{
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return handler_;
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}
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void HttpsUpstream::pause_read(IOCtrlReason reason)
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{
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ioctrl_.pause_read(reason);
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}
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void HttpsUpstream::resume_read(IOCtrlReason reason)
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{
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if(ioctrl_.resume_read(reason)) {
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// Process remaining data in input buffer here because these bytes
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// are not notified by readcb until new data arrive.
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on_read();
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}
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}
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namespace {
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void https_downstream_readcb(bufferevent *bev, void *ptr)
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{
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DownstreamConnection *dconn = reinterpret_cast<DownstreamConnection*>(ptr);
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Downstream *downstream = dconn->get_downstream();
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HttpsUpstream *upstream;
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upstream = static_cast<HttpsUpstream*>(downstream->get_upstream());
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int rv = downstream->parse_http_response();
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if(rv == 0) {
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if(downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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if(downstream->get_response_connection_close()) {
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// Connection close
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downstream->set_downstream_connection(0);
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delete dconn;
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dconn = 0;
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} else {
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// Keep-alive
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dconn->detach_downstream(downstream);
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}
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if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
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upstream->pop_downstream();
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delete downstream;
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// Process next HTTP request
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upstream->resume_read(SHRPX_MSG_BLOCK);
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}
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} else {
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ClientHandler *handler = upstream->get_client_handler();
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bufferevent *bev = handler->get_bev();
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size_t outputlen = evbuffer_get_length(bufferevent_get_output(bev));
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if(outputlen > SHRPX_HTTPS_UPSTREAM_OUTPUT_UPPER_THRES) {
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downstream->pause_read(SHRPX_NO_BUFFER);
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}
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}
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} else {
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if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
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// We already sent HTTP response headers to upstream
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// client. Just close the upstream connection.
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delete upstream->get_client_handler();
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} else {
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// We did not sent any HTTP response, so sent error
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// response. Cannot reuse downstream connection in this case.
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upstream->error_reply(502);
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if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
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upstream->pop_downstream();
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delete downstream;
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// Process next HTTP request
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upstream->resume_read(SHRPX_MSG_BLOCK);
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}
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}
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}
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}
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} // namespace
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namespace {
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void https_downstream_writecb(bufferevent *bev, void *ptr)
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{
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DownstreamConnection *dconn = reinterpret_cast<DownstreamConnection*>(ptr);
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Downstream *downstream = dconn->get_downstream();
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HttpsUpstream *upstream;
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upstream = static_cast<HttpsUpstream*>(downstream->get_upstream());
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upstream->resume_read(SHRPX_NO_BUFFER);
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}
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} // namespace
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namespace {
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void https_downstream_eventcb(bufferevent *bev, short events, void *ptr)
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{
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DownstreamConnection *dconn = reinterpret_cast<DownstreamConnection*>(ptr);
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Downstream *downstream = dconn->get_downstream();
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HttpsUpstream *upstream;
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upstream = static_cast<HttpsUpstream*>(downstream->get_upstream());
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if(events & BEV_EVENT_CONNECTED) {
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if(ENABLE_LOG) {
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LOG(INFO) << "Downstream connection established. downstream "
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<< downstream;
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}
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} else if(events & BEV_EVENT_EOF) {
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if(ENABLE_LOG) {
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LOG(INFO) << "Downstream EOF. stream_id="
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<< downstream->get_stream_id();
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}
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if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
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// Server may indicate the end of the request by EOF
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if(ENABLE_LOG) {
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LOG(INFO) << "Assuming downstream content-length is 0 byte";
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}
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upstream->on_downstream_body_complete(downstream);
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//downstream->set_response_state(Downstream::MSG_COMPLETE);
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} else if(downstream->get_response_state() == Downstream::MSG_COMPLETE) {
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// Nothing to do
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} else {
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// error
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if(ENABLE_LOG) {
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LOG(INFO) << "Treated as downstream error";
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}
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upstream->error_reply(502);
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}
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if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
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upstream->pop_downstream();
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delete downstream;
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upstream->resume_read(SHRPX_MSG_BLOCK);
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}
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} else if(events & (BEV_EVENT_ERROR | BEV_EVENT_TIMEOUT)) {
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if(ENABLE_LOG) {
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LOG(INFO) << "Downstream error/timeout. " << downstream;
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}
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if(downstream->get_response_state() == Downstream::INITIAL) {
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int status;
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if(events & BEV_EVENT_TIMEOUT) {
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status = 504;
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} else {
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status = 502;
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}
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upstream->error_reply(status);
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}
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if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
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upstream->pop_downstream();
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delete downstream;
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upstream->resume_read(SHRPX_MSG_BLOCK);
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}
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}
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}
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} // namespace
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void HttpsUpstream::error_reply(int status_code)
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{
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std::string html = http::create_error_html(status_code);
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std::stringstream ss;
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ss << "HTTP/1.1 " << http::get_status_string(status_code) << "\r\n"
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<< "Server: " << get_config()->server_name << "\r\n"
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<< "Content-Length: " << html.size() << "\r\n"
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<< "Content-Type: " << "text/html; charset=UTF-8\r\n";
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if(get_client_handler()->get_should_close_after_write()) {
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ss << "Connection: close\r\n";
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}
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ss << "\r\n";
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std::string header = ss.str();
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evbuffer *output = bufferevent_get_output(handler_->get_bev());
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evbuffer_add(output, header.c_str(), header.size());
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evbuffer_add(output, html.c_str(), html.size());
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Downstream *downstream = get_top_downstream();
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if(downstream) {
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downstream->set_response_state(Downstream::MSG_COMPLETE);
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}
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}
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bufferevent_data_cb HttpsUpstream::get_downstream_readcb()
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{
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return https_downstream_readcb;
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}
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bufferevent_data_cb HttpsUpstream::get_downstream_writecb()
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{
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return https_downstream_writecb;
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}
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bufferevent_event_cb HttpsUpstream::get_downstream_eventcb()
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{
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return https_downstream_eventcb;
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}
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void HttpsUpstream::add_downstream(Downstream *downstream)
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{
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downstream_queue_.push_back(downstream);
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}
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void HttpsUpstream::pop_downstream()
|
|
{
|
|
downstream_queue_.pop_front();
|
|
}
|
|
|
|
Downstream* HttpsUpstream::get_top_downstream()
|
|
{
|
|
if(downstream_queue_.empty()) {
|
|
return 0;
|
|
} else {
|
|
return downstream_queue_.front();
|
|
}
|
|
}
|
|
|
|
Downstream* HttpsUpstream::get_last_downstream()
|
|
{
|
|
if(downstream_queue_.empty()) {
|
|
return 0;
|
|
} else {
|
|
return downstream_queue_.back();
|
|
}
|
|
}
|
|
|
|
int HttpsUpstream::on_downstream_header_complete(Downstream *downstream)
|
|
{
|
|
if(ENABLE_LOG) {
|
|
LOG(INFO) << "Downstream on_downstream_header_complete";
|
|
}
|
|
std::string via_value;
|
|
std::string hdrs = "HTTP/1.1 ";
|
|
hdrs += http::get_status_string(downstream->get_response_http_status());
|
|
hdrs += "\r\n";
|
|
for(Headers::const_iterator i = downstream->get_response_headers().begin();
|
|
i != downstream->get_response_headers().end(); ++i) {
|
|
if(util::strieq((*i).first.c_str(), "keep-alive") || // HTTP/1.0?
|
|
util::strieq((*i).first.c_str(), "connection") ||
|
|
util:: strieq((*i).first.c_str(), "proxy-connection")) {
|
|
// These are ignored
|
|
} else if(util::strieq((*i).first.c_str(), "via")) {
|
|
via_value = (*i).second;
|
|
} else {
|
|
hdrs += (*i).first;
|
|
hdrs += ": ";
|
|
hdrs += (*i).second;
|
|
hdrs += "\r\n";
|
|
}
|
|
}
|
|
if(get_client_handler()->get_should_close_after_write()) {
|
|
hdrs += "Connection: close\r\n";
|
|
} else if(downstream->get_request_major() == 1 &&
|
|
downstream->get_request_minor() == 0) {
|
|
hdrs += "Connection: Keep-Alive\r\n";
|
|
}
|
|
hdrs += "Via: ";
|
|
hdrs += via_value;
|
|
if(!via_value.empty()) {
|
|
hdrs += ", ";
|
|
}
|
|
hdrs += http::create_via_header_value
|
|
(downstream->get_response_major(), downstream->get_response_minor());
|
|
hdrs += "\r\n";
|
|
hdrs += "\r\n";
|
|
if(ENABLE_LOG) {
|
|
LOG(INFO) << "Upstream https response headers\n" << hdrs;
|
|
}
|
|
evbuffer *output = bufferevent_get_output(handler_->get_bev());
|
|
evbuffer_add(output, hdrs.c_str(), hdrs.size());
|
|
return 0;
|
|
}
|
|
|
|
int HttpsUpstream::on_downstream_body(Downstream *downstream,
|
|
const uint8_t *data, size_t len)
|
|
{
|
|
int rv;
|
|
evbuffer *output = bufferevent_get_output(handler_->get_bev());
|
|
if(downstream->get_chunked_response()) {
|
|
char chunk_size_hex[16];
|
|
rv = snprintf(chunk_size_hex, sizeof(chunk_size_hex), "%X\r\n",
|
|
static_cast<unsigned int>(len));
|
|
evbuffer_add(output, chunk_size_hex, rv);
|
|
}
|
|
evbuffer_add(output, data, len);
|
|
return 0;
|
|
}
|
|
|
|
int HttpsUpstream::on_downstream_body_complete(Downstream *downstream)
|
|
{
|
|
if(downstream->get_chunked_response()) {
|
|
evbuffer *output = bufferevent_get_output(handler_->get_bev());
|
|
evbuffer_add(output, "0\r\n\r\n", 5);
|
|
}
|
|
if(ENABLE_LOG) {
|
|
LOG(INFO) << "Downstream on_downstream_body_complete";
|
|
}
|
|
if(downstream->get_request_connection_close()) {
|
|
ClientHandler *handler = downstream->get_upstream()->get_client_handler();
|
|
handler->set_should_close_after_write(true);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
} // namespace shrpx
|