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2016-09-21Fix a type error that would not compile on Apple LLVM version 6.1.0 ↵Jeremy Rubin
(clang-602.0.53) (based on LLVM 3.6.0svn) Github-Pull: #8513 Rebased-From: 8194a6e525514d5cda85ac08273a6ffb6d5b6cac
2015-11-13http: speed up shutdownWladimir J. van der Laan
This continues/fixes #6719. `event_base_loopbreak` was not doing what I expected it to, at least in libevent 2.0.21. What I expected was that it sets a timeout, given that no other pending events it would exit in N seconds. However, what it does was delay the event loop exit with 10 seconds, even if nothing is pending. Solve it in a different way: give the event loop thread time to exit out of itself, and if it doesn't, send loopbreak. This speeds up the RPC tests a lot, each exit incurred a 10 second overhead, with this change there should be no shutdown overhead in the common case and up to two seconds if the event loop is blocking. As a bonus this breaks dependency on boost::thread_group, as the HTTP server minds its own offspring.
2015-09-21rpc: Split option -rpctimeout into -rpcservertimeout and -rpcclienttimeoutWladimir J. van der Laan
The two timeouts for the server and client, are essentially different: - In the case of the server it should be a lower value to avoid clients clogging up connection slots - In the case of the client it should be a high value to accomedate slow responses from the server, for example for slow queries or when the lock is contended Split the options into `-rpcservertimeout` and `-rpcclienttimeout` with respective defaults of 30 and 900.
2015-09-03Fix race condition between starting HTTP server thread and setting EventBase()Wladimir J. van der Laan
Split StartHTTPServer into InitHTTPServer and StartHTTPServer to give clients a window to register their handlers without race conditions. Thanks @ajweiss for figuring this out.
2015-09-03Document options for new HTTP/RPC server in --helpWladimir J. van der Laan
2015-09-03Implement RPCTimerHandler for Qt RPC consoleWladimir J. van der Laan
Implement RPCTimerHandler for Qt RPC console, so that `walletpassphrase` works with GUI and `-server=0`. Also simplify HTTPEvent-related code by using boost::function directly.
2015-09-03evhttpd implementationWladimir J. van der Laan
- *Replace usage of boost::asio with [libevent2](http://libevent.org/)*. boost::asio is not part of C++11, so unlike other boost there is no forwards-compatibility reason to stick with it. Together with #4738 (convert json_spirit to UniValue), this rids Bitcoin Core of the worst offenders with regard to compile-time slowness. - *Replace spit-and-duct-tape http server with evhttp*. Front-end http handling is handled by libevent, a work queue (with configurable depth and parallelism) is used to handle application requests. - *Wrap HTTP request in C++ class*; this makes the application code mostly HTTP-server-neutral - *Refactor RPC to move all http-specific code to a separate file*. Theoreticaly this can allow building without HTTP server but with another RPC backend, e.g. Qt's debug console (currently not implemented) or future RPC mechanisms people may want to use. - *HTTP dispatch mechanism*; services (e.g., RPC, REST) register which URL paths they want to handle. By using a proven, high-performance asynchronous networking library (also used by Tor) and HTTP server, problems such as #5674, #5655, #344 should be avoided. What works? bitcoind, bitcoin-cli, bitcoin-qt. Unit tests and RPC/REST tests pass. The aim for now is everything but SSL support. Configuration options: - `-rpcthreads`: repurposed as "number of work handler threads". Still defaults to 4. - `-rpcworkqueue`: maximum depth of work queue. When this is reached, new requests will return a 500 Internal Error. - `-rpctimeout`: inactivity time, in seconds, after which to disconnect a client. - `-debug=http`: low-level http activity logging