diff options
Diffstat (limited to 'src/httpserver.cpp')
| -rw-r--r-- | src/httpserver.cpp | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/src/httpserver.cpp b/src/httpserver.cpp index 5923871691..f6cbaa20b7 100644 --- a/src/httpserver.cpp +++ b/src/httpserver.cpp @@ -24,6 +24,7 @@ #include <event2/thread.h> #include <event2/buffer.h> +#include <event2/bufferevent.h> #include <event2/util.h> #include <event2/keyvalq_struct.h> @@ -239,6 +240,16 @@ static std::string RequestMethodString(HTTPRequest::RequestMethod m) /** HTTP request callback */ static void http_request_cb(struct evhttp_request* req, void* arg) { + // Disable reading to work around a libevent bug, fixed in 2.2.0. + if (event_get_version_number() >= 0x02010600 && event_get_version_number() < 0x02020001) { + evhttp_connection* conn = evhttp_request_get_connection(req); + if (conn) { + bufferevent* bev = evhttp_connection_get_bufferevent(conn); + if (bev) { + bufferevent_disable(bev, EV_READ); + } + } + } std::unique_ptr<HTTPRequest> hreq(new HTTPRequest(req)); LogPrint(BCLog::HTTP, "Received a %s request for %s from %s\n", @@ -481,6 +492,8 @@ void StopHTTPServer() } if (eventBase) { LogPrint(BCLog::HTTP, "Waiting for HTTP event thread to exit\n"); + // Exit the event loop as soon as there are no active events. + event_base_loopexit(eventBase, nullptr); // Give event loop a few seconds to exit (to send back last RPC responses), then break it // Before this was solved with event_base_loopexit, but that didn't work as expected in // at least libevent 2.0.21 and always introduced a delay. In libevent @@ -599,8 +612,21 @@ void HTTPRequest::WriteReply(int nStatus, const std::string& strReply) struct evbuffer* evb = evhttp_request_get_output_buffer(req); assert(evb); evbuffer_add(evb, strReply.data(), strReply.size()); - HTTPEvent* ev = new HTTPEvent(eventBase, true, - std::bind(evhttp_send_reply, req, nStatus, (const char*)nullptr, (struct evbuffer *)nullptr)); + auto req_copy = req; + HTTPEvent* ev = new HTTPEvent(eventBase, true, [req_copy, nStatus]{ + evhttp_send_reply(req_copy, nStatus, nullptr, nullptr); + // Re-enable reading from the socket. This is the second part of the libevent + // workaround above. + if (event_get_version_number() >= 0x02010600 && event_get_version_number() < 0x02020001) { + evhttp_connection* conn = evhttp_request_get_connection(req_copy); + if (conn) { + bufferevent* bev = evhttp_connection_get_bufferevent(conn); + if (bev) { + bufferevent_enable(bev, EV_READ | EV_WRITE); + } + } + } + }); ev->trigger(nullptr); replySent = true; req = nullptr; // transferred back to main thread |