Add podcast proxy support for Martin

[noxon-gateway.git] / www / proxy.php

diff --git a/www/proxy.php b/www/proxy.php
new file mode 100644 (file)
index 0000000..e220241
--- /dev/null
+++ b/www/proxy.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * PHP proxy script that proxies the URL given in the "url" parameter.
+ *
+ * Sends all incoming headers, and also returns all remote headers.
+ * Streams the response, so that large responses should work fine.
+ *
+ * @author Christian Weiske <cweiske@cweiske.de>
+ */
+require_once __DIR__ . '/../data/config.php';
+if (!isset($enablePodcastProxy) || $enablePodcastProxy == false) {
+    header('HTTP/1.0 403 Forbidden');
+    echo "Proxying is not enabled in config.php\n";
+    exit(1);
+}
+
+if (!isset($_GET['url']) || $_GET['url'] == '') {
+    header('HTTP/1.0 400 Bad Request');
+    echo "url parameter missing\n";
+    exit(1);
+}
+if (substr($_GET['url'], 0, 7) != 'http://'
+    && substr($_GET['url'], 0, 8) != 'https://'
+) {
+    header('HTTP/1.0 400 Bad Request');
+    echo "Only http and https URLs supported\n";
+    exit(1);
+}
+
+$url = $_GET['url'];
+
+//send original http headers
+$headers = [];
+foreach (apache_request_headers() as $name => $value) {
+    if (strtolower($name) == 'host') {
+        continue;
+    }
+    $headers[] = $name . ': ' . $value;
+}
+$context = stream_context_create(
+    ['http' => ['header' => $headers, 'ignore_errors' => true]]
+);
+
+$fp = fopen($url, 'r', false, $context);
+if (!$fp) {
+    header('HTTP/1.0 400 Bad Request');
+    echo "Error fetching URL\n";
+    exit(1);
+}
+
+//send original headers
+if (is_array($http_response_header)) {
+    foreach ($http_response_header as $header) {
+        header($header);
+    }
+}
+
+//stream the data in 1kiB blocks
+while(!feof($fp)) {
+    echo fread($fp, 1024);
+    flush();
+}
+fclose($fp);
+?>