Add higher level HTTP client examples

Author: clue

examples/13-http-client-blocking.php

@@ -0,0 +1,35 @@
+<?php
+
+use React\EventLoop\Factory;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$loop = Factory::create();
+
+// connect to www.google.com:80 (blocking call!)
+// for illustration purposes only, should use react/socket instead
+$stream = stream_socket_client('tcp://www.google.com:80');
+if (!$stream) {
+    exit(1);
+}
+stream_set_blocking($stream, false);
+
+// send HTTP request
+fwrite($stream, "GET / HTTP/1.1\r\nHost: www.google.com\r\nConnection: close\r\n\r\n");
+
+// wait for HTTP response
+$loop->addReadStream($stream, function ($stream) use ($loop) {
+    $chunk = fread($stream, 64 * 1024);
+
+    // reading nothing means we reached EOF
+    if ($chunk === '') {
+        echo '[END]' . PHP_EOL;
+        $loop->removeReadStream($stream);
+        fclose($stream);
+        return;
+    }
+
+    echo $chunk;
+});
+
+$loop->run();

examples/14-http-client-async.php

@@ -0,0 +1,63 @@
+<?php
+
+use React\EventLoop\Factory;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$loop = Factory::create();
+
+// resolve hostname before establishing TCP/IP connection (resolving DNS is still blocking here)
+// for illustration purposes only, should use react/socket or react/dns instead!
+$ip = gethostbyname('www.google.com');
+if (ip2long($ip) === false) {
+    echo 'Unable to resolve hostname' . PHP_EOL;
+    exit(1);
+}
+
+// establish TCP/IP connection (non-blocking)
+// for illustraction purposes only, should use react/socket instead!
+$stream = stream_socket_client('tcp://' . $ip . ':80', $errno, $errstr, null, STREAM_CLIENT_CONNECT | STREAM_CLIENT_ASYNC_CONNECT);
+if (!$stream) {
+    exit(1);
+}
+stream_set_blocking($stream, false);
+
+// print progress every 10ms
+echo 'Connecting';
+$timer = $loop->addPeriodicTimer(0.01, function () {
+    echo '.';
+});
+
+// wait for connection success/error
+$loop->addWriteStream($stream, function ($stream) use ($loop, $timer) {
+    $loop->removeWriteStream($stream);
+    $loop->cancelTimer($timer);
+
+    // check for socket error (connection rejected)
+    if (stream_socket_get_name($stream, true) === false) {
+        echo '[unable to connect]' . PHP_EOL;
+        exit(1);
+    } else {
+        echo '[connected]' . PHP_EOL;
+    }
+
+    // send HTTP request
+    fwrite($stream, "GET / HTTP/1.1\r\nHost: www.google.com\r\nConnection: close\r\n\r\n");
+
+    // wait for HTTP response
+    $loop->addReadStream($stream, function ($stream) use ($loop) {
+        $chunk = fread($stream, 64 * 1024);
+
+        // reading nothing means we reached EOF
+        if ($chunk === '') {
+            echo '[END]' . PHP_EOL;
+            $loop->removeReadStream($stream);
+            fclose($stream);
+            return;
+        }
+
+        echo $chunk;
+    });
+});
+
+$loop->run();