Error handling improved, logging included

1 files changed, 83 insertions, 0 deletions

diff --git a/src/lib/functions.http.inc.php b/src/lib/functions.http.inc.php
new file mode 100644
index 0000000..44296b5
--- /dev/null
+++ b/src/lib/functions.http.inc.php
@@ -0,0 +1,83 @@
+<?php
+/*
+ *
+ * This file contains functions to be used to
+ * extract information based on http request information.
+ *
+ */
+ 
+/**
+ * Inspired by https://github.com/owncloud/core/blob/master/lib/private/appframework/http/request.php#L523
+ */
+function getServerProtocol() {
+  if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
+      if (strpos($_SERVER['HTTP_X_FORWARDED_PROTO'], ',') !== false) {
+          $parts = explode(',', $_SERVER['HTTP_X_FORWARDED_PROTO']);
+          $proto = strtolower(trim($parts[0]));
+      } else {
+          $proto = strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']);
+      }
+      // Verify that the protocol is always HTTP or HTTPS
+      // default to http if an invalid value is provided
+      return $proto === 'https' ? 'https' : 'http';
+  }
+  if (isset($_SERVER['HTTPS'])
+      && $_SERVER['HTTPS'] !== null
+      && $_SERVER['HTTPS'] !== 'off'
+      && $_SERVER['HTTPS'] !== '') {
+      return 'https';
+  }
+  return 'http';
+}
+
+function getRequestHostname() {
+  if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
+    return strtolower($_SERVER['HTTP_X_FORWARDED_HOST']);
+  }
+  return strtolower($_SERVER['HTTP_HOST']);
+}
+
+function getRequestUriWithoutFilename() {
+  return strtolower(substr($_SERVER['REQUEST_URI'], 0, strrpos($_SERVER['REQUEST_URI'], '/') + 1));
+}
+
+function sendHttpReturnCodeAndJson($code, $data) {
+  if (!is_array($data)) {
+    $data = ['msg' => $data];
+  }
+  header('Content-Type: application/json');
+  sendHttpReturnCodeAndMessage($code, json_encode($data));
+}
+
+function sendHttpReturnCodeAndMessage($code, $text = '') {
+  http_response_code($code);
+  exit($text);
+}
+
+function getOptionalPostParameter($parameterName, $default = NULL) {
+  $parameter = $_POST[$parameterName];
+  if (!isset($parameter) || is_null($parameter) || empty($parameter)) {
+    $parameter = $default;
+  }
+  return $parameter;
+}
+
+function getMandatoryPostParameter($parameterName, $message = '', $json = false) {
+  $parameter = $_POST[$parameterName];
+  if (!isset($parameter) || is_null($parameter) || empty($parameter)) {
+    if (empty($message)) {
+      if ($json) {
+        $message = ['msg' => 'Missing parameter.', 'parameters' => ['missing_parameter' => $parameterName]];
+      } else {
+        $message = 'Missing mandatory parameter "'.$parameterName.'".';
+      }
+    }
+    if (!$json) {
+      sendHttpReturnCodeAndMessage(400, $message);
+    } else {
+      sendHttpReturnCodeAndJson(400, $message);
+    }
+  }
+  return $parameter;
+}
+?>
\ No newline at end of file