PHP: EventHttp::setCallback

Description

public EventHttp::setCallback( string $path , string $cb , string $arg = ?): void

Sets a callback for specified URI.

Parameters

path

The path for which to invoke the callback.

cb

The callback callable that gets invoked on requested path . It should match the following prototype:

callback( EventHttpRequest $req = NULL , mixed $arg = NULL ): void

req: EventHttpRequest object.
arg: Custom data.

arg

Custom data.

Return Values

Returns true on success or false on failure.

Examples

Example #1 EventHttp::setCallback() example

<?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
 *
 * 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();
?>

The above example will output something similar to:

a=12
HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close

EventHttp::setCallback

Description

Parameters

Return Values

Examples

See Also

User Contributed Notes