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shrpx: Added error handling when error_reply() failed

This commit is contained in:
Tatsuhiro Tsujikawa 2012-07-16 23:29:48 +09:00
parent e817995063
commit 0f5a37fa2a
3 changed files with 60 additions and 20 deletions
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46
examples/shrpx_https_upstream.cc
View File

@ -145,8 +145,11 @@ int htp_hdrs_completecb(http_parser *htp)
if(downstream->get_expect_100_continue()) {
static const char reply_100[] = "HTTP/1.1 100 Continue\r\n\r\n";
bufferevent_write(upstream->get_client_handler()->get_bev(),
reply_100, sizeof(reply_100)-1);
if(bufferevent_write(upstream->get_client_handler()->get_bev(),
reply_100, sizeof(reply_100)-1) != 0) {
LOG(FATAL) << "bufferevent_write() faild";
return -1;
}
}
int rv = dconn->attach_downstream(downstream);
@ -154,7 +157,7 @@ int htp_hdrs_completecb(http_parser *htp)
downstream->set_request_state(Downstream::CONNECT_FAIL);
downstream->set_downstream_connection(0);
delete dconn;
return 1;
return -1;
} else {
downstream->push_request_headers();
downstream->set_request_state(Downstream::HEADER_COMPLETE);
@ -229,7 +232,9 @@ int HttpsUpstream::on_read()
if(htperr == HPE_PAUSED) {
if(downstream->get_request_state() == Downstream::CONNECT_FAIL) {
get_client_handler()->set_should_close_after_write(true);
error_reply(503);
if(error_reply(503) != 0) {
return -1;
}
// Downstream gets deleted after response body is read.
} else {
assert(downstream->get_request_state() == Downstream::MSG_COMPLETE);
@ -250,7 +255,9 @@ int HttpsUpstream::on_read()
LOG(WARNING) << "Request Header too long:" << current_header_length_
<< " bytes";
get_client_handler()->set_should_close_after_write(true);
error_reply(400);
if(error_reply(400) != 0) {
return -1;
}
} else if(downstream->get_output_buffer_full()) {
if(ENABLE_LOG) {
LOG(INFO) << "Downstream output buffer is full";
@ -265,7 +272,9 @@ int HttpsUpstream::on_read()
<< http_errno_description(htperr);
}
get_client_handler()->set_should_close_after_write(true);
error_reply(400);
if(error_reply(400) != 0) {
return -1;
}
}
return 0;
}
@ -359,7 +368,10 @@ void https_downstream_readcb(bufferevent *bev, void *ptr)
} else {
// We did not sent any HTTP response, so sent error
// response. Cannot reuse downstream connection in this case.
upstream->error_reply(502);
if(upstream->error_reply(502) != 0) {
delete upstream->get_client_handler();
return;
}
if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
upstream->pop_downstream();
delete downstream;
@ -423,7 +435,10 @@ void https_downstream_eventcb(bufferevent *bev, short events, void *ptr)
if(ENABLE_LOG) {
LOG(INFO) << "Treated as downstream error";
}
upstream->error_reply(502);
if(upstream->error_reply(502) != 0) {
delete upstream->get_client_handler();
return;
}
}
if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
upstream->pop_downstream();
@ -441,7 +456,10 @@ void https_downstream_eventcb(bufferevent *bev, short events, void *ptr)
} else {
status = 502;
}
upstream->error_reply(status);
if(upstream->error_reply(status) != 0) {
delete upstream->get_client_handler();
return;
}
}
if(downstream->get_request_state() == Downstream::MSG_COMPLETE) {
upstream->pop_downstream();
@ -452,7 +470,7 @@ void https_downstream_eventcb(bufferevent *bev, short events, void *ptr)
}
} // namespace
void HttpsUpstream::error_reply(int status_code)
int HttpsUpstream::error_reply(int status_code)
{
std::string html = http::create_error_html(status_code);
std::stringstream ss;
@ -466,12 +484,16 @@ void HttpsUpstream::error_reply(int status_code)
ss << "\r\n";
std::string header = ss.str();
evbuffer *output = bufferevent_get_output(handler_->get_bev());
evbuffer_add(output, header.c_str(), header.size());
evbuffer_add(output, html.c_str(), html.size());
if(evbuffer_add(output, header.c_str(), header.size()) != 0 ||
evbuffer_add(output, html.c_str(), html.size()) != 0) {
LOG(FATAL) << "evbuffer_add() failed";
return -1;
}
Downstream *downstream = get_top_downstream();
if(downstream) {
downstream->set_response_state(Downstream::MSG_COMPLETE);
}
return 0;
}
bufferevent_data_cb HttpsUpstream::get_downstream_readcb()

2
examples/shrpx_https_upstream.h
View File

@ -58,7 +58,7 @@ public:
void pop_downstream();
Downstream* get_top_downstream();
Downstream* get_last_downstream();
void error_reply(int status_code);
int error_reply(int status_code);
void pause_read(IOCtrlReason reason);
void resume_read(IOCtrlReason reason);

32
examples/shrpx_spdy_upstream.cc
View File

@ -374,7 +374,10 @@ void spdy_downstream_readcb(bufferevent *bev, void *ptr)
if(downstream->get_response_state() == Downstream::HEADER_COMPLETE) {
upstream->rst_stream(downstream, SPDYLAY_INTERNAL_ERROR);
} else {
upstream->error_reply(downstream, 502);
if(upstream->error_reply(downstream, 502) != 0) {
delete upstream->get_client_handler();
return;
}
}
downstream->set_response_state(Downstream::MSG_COMPLETE);
// Clearly, we have to close downstream connection on http parser
@ -383,7 +386,10 @@ void spdy_downstream_readcb(bufferevent *bev, void *ptr)
delete dconn;
dconn = 0;
}
upstream->send();
if(upstream->send() != 0) {
delete upstream->get_client_handler();
return;
}
// At this point, downstream may be deleted.
}
} // namespace
@ -450,10 +456,16 @@ void spdy_downstream_eventcb(bufferevent *bev, short events, void *ptr)
} else {
// If stream was not closed, then we set MSG_COMPLETE and let
// on_stream_close_callback delete downstream.
upstream->error_reply(downstream, 502);
if(upstream->error_reply(downstream, 502) != 0) {
upstream->get_client_handler();
return;
}
downstream->set_response_state(Downstream::MSG_COMPLETE);
}
upstream->send();
if(upstream->send() != 0) {
delete upstream->get_client_handler();
return;
}
// At this point, downstream may be deleted.
}
} else if(events & (BEV_EVENT_ERROR | BEV_EVENT_TIMEOUT)) {
@ -490,11 +502,17 @@ void spdy_downstream_eventcb(bufferevent *bev, short events, void *ptr)
} else {
status = 502;
}
upstream->error_reply(downstream, status);
if(upstream->error_reply(downstream, status) != 0) {
delete upstream->get_client_handler();
return;
}
}
downstream->set_response_state(Downstream::MSG_COMPLETE);
}
upstream->send();
if(upstream->send() != 0) {
delete upstream->get_client_handler();
return;
}
// At this point, downstream may be deleted.
}
}
@ -568,7 +586,7 @@ int SpdyUpstream::error_reply(Downstream *downstream, int status_code)
rv = evbuffer_add(body, html.c_str(), html.size());
if(rv == -1) {
LOG(FATAL) << "evbuffer_add() failed";
DIE();
return -1;
}
downstream->set_response_state(Downstream::MSG_COMPLETE);