Changeset 4379 for sites/trunk/wordcamp.org/public_html/wp-content/mu-plugins/helper-functions.php

Timestamp:

11/19/2016 09:40:13 PM (9 years ago)

Author:

iandunn

Message:

WordCamp Helpers: Add a wrapper for wp_remote_get() that retries failures

File:

• sites/trunk/wordcamp.org/public_html/wp-content/mu-plugins/helper-functions.php (modified) (2 diffs)

sites/trunk/wordcamp.org/public_html/wp-content/mu-plugins/helper-functions.php

@@ -1 +1 @@
 <?php
+
+use WordCamp\Logger;
 
 /**
@@ -217 +219 @@
     return $fields;
 }
+
+/**
+ * Make a remote HTTP request, and retry if it fails
+ *
+ * Sometimes the HTTP request times out, or there's a temporary server-side error, etc. Some use cases require a
+ * successful request, like stats scripts, where the resulting data would be distorted by a failed response.
+ *
+ * @todo Remove this if https://github.com/rmccue/Requests/issues/222 is implemented
+ *
+ * @param string $request_url
+ * @param array  $request_args
+ *
+ * @return array|WP_Error
+ */
+function wcorg_redundant_remote_get( $request_url, $request_args = array() ) {
+    $attempt_count = 1;
+
+    while ( true ) {
+        $response    = wp_remote_get( $request_url, $request_args );
+        $status_code = wp_remote_retrieve_response_code( $response );
+        $body        = wp_remote_retrieve_body( $response );
+        $retry_after = wp_remote_retrieve_header( $response, 'retry-after' ) ?: 5;
+        $retry_after = min( $retry_after * $attempt_count, 30 );
+
+        if ( ! is_wp_error( $response ) && 200 === $status_code && $body ) {
+            break;
+        }
+
+        if ( $attempt_count < 3 ) {
+            Logger\log( 'request_failed_temporarily', compact( 'request_url', 'request_args', 'response', 'attempt_count', 'retry_after' ) );
+            sleep( $retry_after );
+        } else {
+            Logger\log( 'request_failed_permenantly', compact( 'request_url', 'request_args', 'response' ) );
+            break;
+        }
+
+        $attempt_count++;
+    }
+
+    return $response;
+}