Php/docs/event.examples
范例
Example #1 Simple HTTP client
<?php// Read callbackfunction readcb($bev, $base) { //$input = $bev->input; //$bev->getInput(); //$pos = $input->search("TTP"); $pos = $bev->input->search("TTP"); while (($n = $bev->input->remove($buf, 1024)) > 0) { echo $buf; }}// Event callbackfunction eventcb($bev, $events, $base) { if ($events & EventBufferEvent::CONNECTED) { echo "Connected.\n"; } elseif ($events & (EventBufferEvent::ERROR | EventBufferEvent::EOF)) { if ($events & EventBufferEvent::ERROR) { echo "DNS error: ", $bev->getDnsErrorString(), PHP_EOL; } echo "Closing\n"; $base->exit(); exit("Done\n"); }}if ($argc != 3) { echo <<<EOSTrivial HTTP 0.x clientSyntax: php {$argv[0]} [hostname] [resource]Example: php {$argv[0]} www.google.com /EOS; exit();}$base = new EventBase();$dns_base = new EventDnsBase($base, TRUE); // We'll use async DNS resolvingif (!$dns_base) { exit("Failed to init DNS Base\n");}$bev = new EventBufferEvent($base, /* use internal socket */ NULL, EventBufferEvent::OPT_CLOSE_ON_FREE | EventBufferEvent::OPT_DEFER_CALLBACKS, "readcb", /* writecb */ NULL, "eventcb");if (!$bev) { exit("Failed creating bufferevent socket\n");}//$bev->setCallbacks("readcb", /* writecb */ NULL, "eventcb", $base);$bev->enable(Event::READ | Event::WRITE);$output = $bev->output; //$bev->getOutput();if (!$output->add( "GET {$argv[2]} HTTP/1.0\r\n". "Host: {$argv[1]}\r\n". "Connection: Close\r\n\r\n")) { exit("Failed adding request to output buffer\n");}if (!$bev->connectHost($dns_base, $argv[1], 80, EventUtil::AF_UNSPEC)) { exit("Can't connect to host {$argv[1]}\n");}$base->dispatch();?>
以上例程的输出类似于：
Connected. HTTP/1.1 301 Moved Permanently Date: Fri, 01 Mar 2013 18:47:48 GMT Location: http://www.google.co.uk/ Content-Type: text/html; charset=UTF-8 Cache-Control: public, max-age=2592000 Server: gws Content-Length: 221 X-XSS-Protection: 1; mode=block X-Frame-Options: SAMEORIGIN Age: 133438 Expires: Sat, 30 Mar 2013 05:39:28 GMT Connection: close <HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8"> <TITLE>301 Moved</TITLE></HEAD><BODY> <H1>301 Moved</H1> The document has moved <A HREF="http://www.google.co.uk/">here</A>. </BODY></HTML> Closing Done
Example #2 HTTP client using asynchronous DNS resolver
<?php/* * 1. Connect to 127.0.0.1 at port 80 * by means of EventBufferEvent::connect(). * * 2. Request /index.cphp via HTTP/1.0 * using the output buffer. * * 3. Asyncronously read the response and print it to stdout. */// Read callbackfunction readcb($bev, $base) { $input = $bev->getInput(); while (($n = $input->remove($buf, 1024)) > 0) { echo $buf; }}// Event callbackfunction eventcb($bev, $events, $base) { if ($events & EventBufferEvent::CONNECTED) { echo "Connected.\n"; } elseif ($events & (EventBufferEvent::ERROR | EventBufferEvent::EOF)) { if ($events & EventBufferEvent::ERROR) { echo "DNS error: ", $bev->getDnsErrorString(), PHP_EOL; } echo "Closing\n"; $base->exit(); exit("Done\n"); }}$base = new EventBase();echo "step 1\n";$bev = new EventBufferEvent($base, /* use internal socket */ NULL, EventBufferEvent::OPT_CLOSE_ON_FREE | EventBufferEvent::OPT_DEFER_CALLBACKS);if (!$bev) { exit("Failed creating bufferevent socket\n");}echo "step 2\n";$bev->setCallbacks("readcb", /* writecb */ NULL, "eventcb", $base);$bev->enable(Event::READ | Event::WRITE);echo "step 3\n";// Send request$output = $bev->getOutput();if (!$output->add( "GET /index.cphp HTTP/1.0\r\n". "Connection: Close\r\n\r\n")) { exit("Failed adding request to output buffer\n");}/* Connect to the host syncronously.We know the IP, and don't need to resolve DNS. */if (!$bev->connect("127.0.0.1:80")) { exit("Can't connect to host\n");}// Dispatch pending events$base->dispatch();?>
Example #3 Echo server
<?php/* * Simple echo server based on libevent's connection listener. * * Usage: * 1) In one terminal window run: * * $ php listener.php 9881 * * 2) In another terminal window open up connection, e.g.: * * $ nc 127.0.0.1 9881 * * 3) start typing. The server should repeat the input. */class MyListenerConnection { private $bev, $base; public function __destruct() { $this->bev->free(); } public function __construct($base, $fd) { $this->base = $base; $this->bev = new EventBufferEvent($base, $fd, EventBufferEvent::OPT_CLOSE_ON_FREE); $this->bev->setCallbacks(array($this, "echoReadCallback"), NULL, array($this, "echoEventCallback"), NULL); if (!$this->bev->enable(Event::READ)) { echo "Failed to enable READ\n"; return; } } public function echoReadCallback($bev, $ctx) { // Copy all the data from the input buffer to the output buffer // Variant #1 $bev->output->addBuffer($bev->input); /* Variant #2 */ /* $input = $bev->getInput(); $output = $bev->getOutput(); $output->addBuffer($input); */ } public function echoEventCallback($bev, $events, $ctx) { if ($events & EventBufferEvent::ERROR) { echo "Error from bufferevent\n"; } if ($events & (EventBufferEvent::EOF | EventBufferEvent::ERROR)) { //$bev->free(); $this->__destruct(); } }}class MyListener { public $base, $listener, $socket; private $conn = array(); public function __destruct() { foreach ($this->conn as &$c) $c = NULL; } public function __construct($port) { $this->base = new EventBase(); if (!$this->base) { echo "Couldn't open event base"; exit(1); } // Variant #1 /* $this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); if (!socket_bind($this->socket, '0.0.0.0', $port)) { echo "Unable to bind socket\n"; exit(1); } $this->listener = new EventListener($this->base, array($this, "acceptConnCallback"), $this->base, EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1, $this->socket); */ // Variant #2 $this->listener = new EventListener($this->base, array($this, "acceptConnCallback"), $this->base, EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1, "0.0.0.0:$port"); if (!$this->listener) { echo "Couldn't create listener"; exit(1); } $this->listener->setErrorCallback(array($this, "accept_error_cb")); } public function dispatch() { $this->base->dispatch(); } // This callback is invoked when there is data to read on $bev public function acceptConnCallback($listener, $fd, $address, $ctx) { // We got a new connection! Set up a bufferevent for it. */ $base = $this->base; $this->conn[] = new MyListenerConnection($base, $fd); } public function accept_error_cb($listener, $ctx) { $base = $this->base; fprintf(STDERR, "Got an error %d (%s) on the listener. " ."Shutting down.\n", EventUtil::getLastSocketErrno(), EventUtil::getLastSocketError()); $base->exit(NULL); }}$port = 9808;if ($argc > 1) { $port = (int) $argv[1];}if ($port <= 0 || $port > 65535) { exit("Invalid port");}$l = new MyListener($port);$l->dispatch();?>
Example #4 SSL echo server
<?php/* * SSL echo server * * To test: * 1) Run: * $ php examples/ssl-echo-server/server.php 9998 * * 2) in another terminal window run: * $ socat - SSL:127.0.0.1:9998,verify=1,cafile=examples/ssl-echo-server/cert.pem */class MySslEchoServer { public $port, $base, $bev, $listener, $ctx; function __construct ($port, $host = "127.0.0.1") { $this->port = $port; $this->ctx = $this->init_ssl(); if (!$this->ctx) { exit("Failed creating SSL context\n"); } $this->base = new EventBase(); if (!$this->base) { exit("Couldn't open event base\n"); } $this->listener = new EventListener($this->base, array($this, "ssl_accept_cb"), $this->ctx, EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1, "$host:$port"); if (!$this->listener) { exit("Couldn't create listener\n"); } $this->listener->setErrorCallback(array($this, "accept_error_cb")); } function dispatch() { $this->base->dispatch(); } // This callback is invoked when there is data to read on $bev. function ssl_read_cb($bev, $ctx) { $in = $bev->input; //$bev->getInput(); printf("Received %zu bytes\n", $in->length); printf("----- data ----\n"); printf("%ld:\t%s\n", (int) $in->length, $in->pullup(-1)); $bev->writeBuffer($in); } // This callback is invoked when some even occurs on the event listener, // e.g. connection closed, or an error occurred function ssl_event_cb($bev, $events, $ctx) { if ($events & EventBufferEvent::ERROR) { // Fetch errors from the SSL error stack while ($err = $bev->sslError()) { fprintf(STDERR, "Bufferevent error %s.\n", $err); } } if ($events & (EventBufferEvent::EOF | EventBufferEvent::ERROR)) { $bev->free(); } } // This callback is invoked when a client accepts new connection function ssl_accept_cb($listener, $fd, $address, $ctx) { // We got a new connection! Set up a bufferevent for it. $this->bev = EventBufferEvent::sslSocket($this->base, $fd, $this->ctx, EventBufferEvent::SSL_ACCEPTING, EventBufferEvent::OPT_CLOSE_ON_FREE); if (!$this->bev) { echo "Failed creating ssl buffer\n"; $this->base->exit(NULL); exit(1); } $this->bev->enable(Event::READ); $this->bev->setCallbacks(array($this, "ssl_read_cb"), NULL, array($this, "ssl_event_cb"), NULL); } // This callback is invoked when we failed to setup new connection for a client function accept_error_cb($listener, $ctx) { fprintf(STDERR, "Got an error %d (%s) on the listener. " ."Shutting down.\n", EventUtil::getLastSocketErrno(), EventUtil::getLastSocketError()); $this->base->exit(NULL); } // Initialize SSL structures, create an EventSslContext // Optionally create self-signed certificates function init_ssl() { // We *must* have entropy. Otherwise there's no point to crypto. if (!EventUtil::sslRandPoll()) { exit("EventUtil::sslRandPoll failed\n"); } $local_cert = __DIR__."/cert.pem"; $local_pk = __DIR__."/privkey.pem"; if (!file_exists($local_cert) || !file_exists($local_pk)) { echo "Couldn't read $local_cert or $local_pk file. To generate a key\n", "and self-signed certificate, run:\n", " openssl genrsa -out $local_pk 2048\n", " openssl req -new -key $local_pk -out cert.req\n", " openssl x509 -req -days 365 -in cert.req -signkey $local_pk -out $local_cert\n"; return FALSE; } $ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, array ( EventSslContext::OPT_LOCAL_CERT => $local_cert, EventSslContext::OPT_LOCAL_PK => $local_pk, //EventSslContext::OPT_PASSPHRASE => "echo server", EventSslContext::OPT_VERIFY_PEER => true, EventSslContext::OPT_ALLOW_SELF_SIGNED => false, )); return $ctx; }}// Allow to override the port$port = 9999;if ($argc > 1) { $port = (int) $argv[1];}if ($port <= 0 || $port > 65535) { exit("Invalid port\n");}$l = new MySslEchoServer($port);$l->dispatch();?>
Example #5 Signal handler
<?php/*Launch it in a terminal window:$ php examples/signal.phpIn another terminal window find out the pid and send SIGTERM, e.g.:$ ps aux | grep exampruslan 3976 0.2 0.0 139896 11256 pts/1 S+ 10:25 0:00 php examples/signal.phpruslan 3978 0.0 0.0 9572 864 pts/2 S+ 10:26 0:00 grep --color=auto examp$ kill -TERM 3976At the first terminal window you should catch the following:Caught signal 15*/class MyEventSignal { private $base; function __construct($base) { $this->base = $base; } function eventSighandler($no, $c) { echo "Caught signal $no\n"; event_base_loopexit($c->base); }}$base = event_base_new();$c = new MyEventSignal($base);$no = SIGTERM;$ev = evsignal_new($base, $no, array($c,'eventSighandler'), $c);evsignal_add($ev);event_base_loop($base);?>
Example #6 Use libevent's loop to process requests of `eio' extension
<?php// Callback for eio_nop()function my_nop_cb($d, $r) { echo "step 6\n";}$dir = "/tmp/abc-eio-temp";if (file_exists($dir)) { rmdir($dir);}echo "step 1\n";$base = new EventBase();echo "step 2\n";eio_init();eio_mkdir($dir, 0750, EIO_PRI_DEFAULT, "my_nop_cb");$event = new Event($base, eio_get_event_stream(), Event::READ | Event::PERSIST, function ($fd, $events, $base) { echo "step 5\n"; while (eio_nreqs()) { eio_poll(); } $base->stop();}, $base);echo "step 3\n";$event->add();echo "step 4\n";$base->dispatch();echo "Done\n";?>
Example #7 Miscellaneous
<?php/* {{{ Config & supported stuff */echo "Supported methods:\n";foreach (Event::getSupportedMethods() as $m) { echo $m, PHP_EOL;}// Avoiding "select" method$cfg = new EventConfig();if ($cfg->avoidMethod("select")) { echo "`select' method avoided\n";}// Create event_base associated with the config$base = new EventBase($cfg);echo "Event method used: ", $base->getMethod(), PHP_EOL;echo "Features:\n";$features = $base->getFeatures();($features & EventConfig::FEATURE_ET) and print("ET - edge-triggered IO\n");($features & EventConfig::FEATURE_O1) and print("O1 - O(1) operation for adding/deletting events\n");($features & EventConfig::FEATURE_FDS) and print("FDS - arbitrary file descriptor types, and not just sockets\n");// Require FDS featureif ($cfg->requireFeatures(EventConfig::FEATURE_FDS)) { echo "FDS feature is now requried\n"; $base = new EventBase($cfg); ($base->getFeatures() & EventConfig::FEATURE_FDS) and print("FDS - arbitrary file descriptor types, and not just sockets\n");}/* }}} *//* Event::PERSIST, function ($fd, $events, $arg) { static $max_iterations = 0; if (++$max_iterations >= 5) { /* exit after 5 iterations with timeout of 2.33 seconds */ echo "Stopping...\n"; $arg[0]->exit(2.33); } echo fgets($fd);}, array (&$base));$event->add();$base->loop();/* Base */?>
Example #8 Simple HTTP server
<?php/* * Simple HTTP server. * * To test it: * 1) Run it on a port of your choice, e.g.: * $ php examples/http.php 8010 * 2) In another terminal connect to some address on this port * and make GET or POST request(others are turned off here), e.g.: * $ nc -t 127.0.0.1 8010 * POST /about HTTP/1.0 * Content-Type: text/plain * Content-Length: 4 * Connection: close * (press Enter) * * It will output * a=12 * HTTP/1.0 200 OK * Content-Type: text/html; charset=ISO-8859-1 * Connection: close * * $ nc -t 127.0.0.1 8010 * GET /dump HTTP/1.0 * Content-Type: text/plain * Content-Encoding: UTF-8 * Connection: close * (press Enter) * * It will output: * HTTP/1.0 200 OK * Content-Type: text/html; charset=ISO-8859-1 * Connection: close * (press Enter) * * $ nc -t 127.0.0.1 8010 * GET /unknown HTTP/1.0 * Connection: close * * It will output: * HTTP/1.0 200 OK * Content-Type: text/html; charset=ISO-8859-1 * Connection: close * * 3) See what the server outputs on the previous terminal window. */function _http_dump($req, $data) { static $counter = 0; static $max_requests = 2; if (++$counter >= $max_requests) { echo "Counter reached max requests $max_requests. Exiting\n"; exit(); } echo __METHOD__, " called\n"; echo "request:"; var_dump($req); echo "data:"; var_dump($data); echo "\n===== DUMP =====\n"; echo "Command:", $req->getCommand(), PHP_EOL; echo "URI:", $req->getUri(), PHP_EOL; echo "Input headers:"; var_dump($req->getInputHeaders()); echo "Output headers:"; var_dump($req->getOutputHeaders()); echo "\n >> Sending reply ..."; $req->sendReply(200, "OK"); echo "OK\n"; echo "\n >> Reading input buffer ...\n"; $buf = $req->getInputBuffer(); while ($s = $buf->readLine(EventBuffer::EOL_ANY)) { echo $s, PHP_EOL; } echo "No more data in the buffer\n";}function _http_about($req) { echo __METHOD__, PHP_EOL; echo "URI: ", $req->getUri(), PHP_EOL; echo "\n >> Sending reply ..."; $req->sendReply(200, "OK"); echo "OK\n";}function _http_default($req, $data) { echo __METHOD__, PHP_EOL; echo "URI: ", $req->getUri(), PHP_EOL; echo "\n >> Sending reply ..."; $req->sendReply(200, "OK"); echo "OK\n";}$port = 8010;if ($argc > 1) { $port = (int) $argv[1];}if ($port <= 0 || $port > 65535) { exit("Invalid port");}$base = new EventBase();$http = new EventHttp($base);$http->setAllowedMethods(EventHttpRequest::CMD_GET | EventHttpRequest::CMD_POST);$http->setCallback("/dump", "_http_dump", array(4, 8));$http->setCallback("/about", "_http_about");$http->setDefaultCallback("_http_default", "custom data value");$http->bind("0.0.0.0", 8010);$base->loop();?>
以上例程的输出类似于：
a=12 HTTP/1.0 200 OK Content-Type: text/html; charset=ISO-8859-1 Connection: close HTTP/1.0 200 OK Content-Type: text/html; charset=ISO-8859-1 Connection: close (press Enter) HTTP/1.0 200 OK Content-Type: text/html; charset=ISO-8859-1 Connection: close
Example #9 Simple HTTPS server
<?php/* * Simple HTTPS server. * * 1) Run the server: `php examples/https.php 9999` * 2) Test it: `php examples/ssl-connection.php 9999` */function _http_dump($req, $data) { static $counter = 0; static $max_requests = 200; if (++$counter >= $max_requests) { echo "Counter reached max requests $max_requests. Exiting\n"; exit(); } echo __METHOD__, " called\n"; echo "request:"; var_dump($req); echo "data:"; var_dump($data); echo "\n===== DUMP =====\n"; echo "Command:", $req->getCommand(), PHP_EOL; echo "URI:", $req->getUri(), PHP_EOL; echo "Input headers:"; var_dump($req->getInputHeaders()); echo "Output headers:"; var_dump($req->getOutputHeaders()); echo "\n >> Sending reply ..."; $req->sendReply(200, "OK"); echo "OK\n"; $buf = $req->getInputBuffer(); echo "\n >> Reading input buffer (", $buf->length, ") ...\n"; while ($s = $buf->read(1024)) { echo $s; } echo "\nNo more data in the buffer\n";}function _http_about($req) { echo __METHOD__, PHP_EOL; echo "URI: ", $req->getUri(), PHP_EOL; echo "\n >> Sending reply ..."; $req->sendReply(200, "OK"); echo "OK\n";}function _http_default($req, $data) { echo __METHOD__, PHP_EOL; echo "URI: ", $req->getUri(), PHP_EOL; echo "\n >> Sending reply ..."; $req->sendReply(200, "OK"); echo "OK\n";}function _http_400($req) { $req->sendError(400);}function _init_ssl() { $local_cert = __DIR__."/ssl-echo-server/cert.pem"; $local_pk = __DIR__."/ssl-echo-server/privkey.pem"; $ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, array ( EventSslContext::OPT_LOCAL_CERT => $local_cert, EventSslContext::OPT_LOCAL_PK => $local_pk, //EventSslContext::OPT_PASSPHRASE => "test", EventSslContext::OPT_ALLOW_SELF_SIGNED => true, )); return $ctx;}$port = 9999;if ($argc > 1) { $port = (int) $argv[1];}if ($port <= 0 || $port > 65535) { exit("Invalid port");}$ip = '0.0.0.0';$base = new EventBase();$ctx = _init_ssl();$http = new EventHttp($base, $ctx);$http->setAllowedMethods(EventHttpRequest::CMD_GET | EventHttpRequest::CMD_POST);$http->setCallback("/dump", "_http_dump", array(4, 8));$http->setCallback("/about", "_http_about");$http->setCallback("/err400", "_http_400");$http->setDefaultCallback("_http_default", "custom data value");$http->bind($ip, $port);$base->dispatch();
Example #10 OpenSSL connection
<?php/* * Sample OpenSSL client. * * Usage: * 1) Launch a server, e.g.: * $ php examples/https.php 9999 * * 2) Launch the client in another terminal: * $ php examples/ssl-connection.php 9999 */function _request_handler($req, $base) { echo __FUNCTION__, PHP_EOL; if (is_null($req)) { echo "Timed out\n"; } else { $response_code = $req->getResponseCode(); if ($response_code == 0) { echo "Connection refused\n"; } elseif ($response_code != 200) { echo "Unexpected response: $response_code\n"; } else { echo "Success: $response_code\n"; $buf = $req->getInputBuffer(); echo "Body:\n"; while ($s = $buf->readLine(EventBuffer::EOL_ANY)) { echo $s, PHP_EOL; } } } $base->exit(NULL);}function _init_ssl() { $ctx = new EventSslContext(EventSslContext::SSLv3_CLIENT_METHOD, array ()); return $ctx;}// Allow to override the port$port = 9999;if ($argc > 1) { $port = (int) $argv[1];}if ($port <= 0 || $port > 65535) { exit("Invalid port\n");}$host = '127.0.0.1';$ctx = _init_ssl();if (!$ctx) { trigger_error("Failed creating SSL context", E_USER_ERROR);}$base = new EventBase();if (!$base) { trigger_error("Failed to initialize event base", E_USER_ERROR);}$conn = new EventHttpConnection($base, NULL, $host, $port, $ctx);$conn->setTimeout(50);$req = new EventHttpRequest("_request_handler", $base);$req->addHeader("Host", $host, EventHttpRequest::OUTPUT_HEADER);$buf = $req->getOutputBuffer();$buf->add("<html>HTML TEST</html>");//$req->addHeader("Content-Length", $buf->length, EventHttpRequest::OUTPUT_HEADER);//$req->addHeader("Connection", "close", EventHttpRequest::OUTPUT_HEADER);$conn->makeRequest($req, EventHttpRequest::CMD_POST, "/dump");$base->dispatch();echo "END\n";?>
Example #11 EventHttpConnection::makeRequest() example
<?phpfunction _request_handler($req, $base) { echo __FUNCTION__, PHP_EOL; if (is_null($req)) { echo "Timed out\n"; } else { $response_code = $req->getResponseCode(); if ($response_code == 0) { echo "Connection refused\n"; } elseif ($response_code != 200) { echo "Unexpected response: $response_code\n"; } else { echo "Success: $response_code\n"; $buf = $req->getInputBuffer(); echo "Body:\n"; while ($s = $buf->readLine(EventBuffer::EOL_ANY)) { echo $s, PHP_EOL; } } } $base->exit(NULL);}$address = "127.0.0.1";$port = 80;$base = new EventBase();$conn = new EventHttpConnection($base, NULL, $address, $port);$conn->setTimeout(5);$req = new EventHttpRequest("_request_handler", $base);$req->addHeader("Host", $address, EventHttpRequest::OUTPUT_HEADER);$req->addHeader("Content-Length", "0", EventHttpRequest::OUTPUT_HEADER);$conn->makeRequest($req, EventHttpRequest::CMD_GET, "/index.cphp");$base->loop();?>
以上例程的输出类似于：
_request_handler Success: 200 Body: PHP, date: 2013-03-13T20:27:52+05:00
Example #12 Connection listener based on a UNIX domain socket
<?php/* * Simple echo server based on libevent's connection listener. * * Usage: * 1) In one terminal window run: * * $ php unix-domain-listener.php [path-to-socket] * * 2) In another terminal window open up connection * to the socket, e.g.: * * $ socat - GOPEN:/tmp/1.sock * * 3) Start typing. The server should repeat the input. */class MyListenerConnection { private $bev, $base; public function __destruct() { if ($this->bev) { $this->bev->free(); } } public function __construct($base, $fd) { $this->base = $base; $this->bev = new EventBufferEvent($base, $fd, EventBufferEvent::OPT_CLOSE_ON_FREE); $this->bev->setCallbacks(array($this, "echoReadCallback"), NULL, array($this, "echoEventCallback"), NULL); if (!$this->bev->enable(Event::READ)) { echo "Failed to enable READ\n"; return; } } public function echoReadCallback($bev, $ctx) { // Copy all the data from the input buffer to the output buffer $bev->output->addBuffer($bev->input); } public function echoEventCallback($bev, $events, $ctx) { if ($events & EventBufferEvent::ERROR) { echo "Error from bufferevent\n"; } if ($events & (EventBufferEvent::EOF | EventBufferEvent::ERROR)) { $bev->free(); $bev = NULL; } }}class MyListener { public $base, $listener, $socket; private $conn = array(); public function __destruct() { foreach ($this->conn as &$c) $c = NULL; } public function __construct($sock_path) { $this->base = new EventBase(); if (!$this->base) { echo "Couldn't open event base"; exit(1); } if (file_exists($sock_path)) { unlink($sock_path); } $this->listener = new EventListener($this->base, array($this, "acceptConnCallback"), $this->base, EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1, "unix:$sock_path"); if (!$this->listener) { trigger_error("Couldn't create listener", E_USER_ERROR); } $this->listener->setErrorCallback(array($this, "accept_error_cb")); } public function dispatch() { $this->base->dispatch(); } // This callback is invoked when there is data to read on $bev public function acceptConnCallback($listener, $fd, $address, $ctx) { // We got a new connection! Set up a bufferevent for it. */ $base = $this->base; $this->conn[] = new MyListenerConnection($base, $fd); } public function accept_error_cb($listener, $ctx) { $base = $this->base; fprintf(STDERR, "Got an error %d (%s) on the listener. " ."Shutting down.\n", EventUtil::getLastSocketErrno(), EventUtil::getLastSocketError()); $base->exit(NULL); }}if ($argc <= 1) { exit("Socket path is not provided\n");}$sock_path = $argv[1];$l = new MyListener($sock_path);$l->dispatch();?>
Example #13 Simple SMTP server
<?php /* * Author: Andrew Rose <hello at andrewrose dot co dot uk> * * Usage: * 1) Prepare cert.pem certificate and privkey.pem private key files. * 2) Launch the server script * 3) Open TLS connection, e.g.: * $ openssl s_client -connect localhost:25 -starttls smtp -crlf * 4) Start testing the commands listed in `cmd` method below. */class Handler { public $domainName = FALSE; public $connections = []; public $buffers = []; public $maxRead = 256000; public function __construct() { $this->ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, [ EventSslContext::OPT_LOCAL_CERT => 'cert.pem', EventSslContext::OPT_LOCAL_PK => 'privkey.pem', //EventSslContext::OPT_PASSPHRASE => , EventSslContext::OPT_VERIFY_PEER => false, // change to true with authentic cert EventSslContext::OPT_ALLOW_SELF_SIGNED => true // change to false with authentic cert ]); $this->base = new EventBase(); if (!$this->base) { exit("Couldn't open event base\n"); } if (!$this->listener = new EventListener($this->base, [$this, 'ev_accept'], $this->ctx, EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1, '0.0.0.0:25')) { exit("Couldn't create listener\n"); } $this->listener->setErrorCallback([$this, 'ev_error']); $this->base->dispatch(); } public function ev_accept($listener, $fd, $address, $ctx) { static $id = 0; $id += 1; $this->connections[$id]['clientData'] = ; $this->connections[$id]['cnx'] = new EventBufferEvent($this->base, $fd, EventBufferEvent::OPT_CLOSE_ON_FREE); if (!$this->connections[$id]['cnx']) { echo "Failed creating buffer\n"; $this->base->exit(NULL); exit(1); } $this->connections[$id]['cnx']->setCallbacks([$this, "ev_read"], NULL, [$this, 'ev_error'], $id); $this->connections[$id]['cnx']->enable(Event::READ | Event::WRITE); $this->ev_write($id, '220 '.$this->domainName." wazzzap?\r\n"); } function ev_error($listener, $ctx) { $errno = EventUtil::getLastSocketErrno(); fprintf(STDERR, "Got an error %d (%s) on the listener. Shutting down.\n", $errno, EventUtil::getLastSocketError()); if ($errno != 0) { $this->base->exit(NULL); exit(); } } public function ev_close($id) { $this->connections[$id]['cnx']->disable(Event::READ | Event::WRITE); unset($this->connections[$id]); } protected function ev_write($id, $string) { echo 'S('.$id.'): '.$string; $this->connections[$id]['cnx']->write($string); } public function ev_read($buffer, $id) { while($buffer->input->length > 0) { $this->connections[$id]['clientData'] .= $buffer->input->read($this->maxRead); $clientDataLen = strlen($this->connections[$id]['clientData']); if($this->connections[$id]['clientData'][$clientDataLen-1] == "\n" && $this->connections[$id]['clientData'][$clientDataLen-2] == "\r") { // remove the trailing \r\n $line = substr($this->connections[$id]['clientData'], 0, strlen($this->connections[$id]['clientData']) - 2); $this->connections[$id]['clientData'] = ; $this->cmd($buffer, $id, $line); } } } protected function cmd($buffer, $id, $line) { switch ($line) { case strncmp('EHLO ', $line, 4): $this->ev_write($id, "250-STARTTLS\r\n"); $this->ev_write($id, "250 OK ehlo\r\n"); break; case strncmp('HELO ', $line, 4): $this->ev_write($id, "250-STARTTLS\r\n"); $this->ev_write($id, "250 OK helo\r\n"); break; case strncmp('QUIT', $line, 3): $this->ev_write($id, "250 OK quit\r\n"); $this->ev_close($id); break; case strncmp('STARTTLS', $line, 3): $this->ev_write($id, "220 Ready to start TLS\r\n"); $this->connections[$id]['cnx'] = EventBufferEvent::sslFilter($this->base, $this->connections[$id]['cnx'], $this->ctx, EventBufferEvent::SSL_ACCEPTING, EventBufferEvent::OPT_CLOSE_ON_FREE); $this->connections[$id]['cnx']->setCallbacks([$this, "ev_read"], NULL, [$this, 'ev_error'], $id); $this->connections[$id]['cnx']->enable(Event::READ | Event::WRITE); break; default: echo 'unknown command: '.$line."\n"; break; } }}new Handler();
