From b020612f64c276db2ba679f77c8e4765e0b133ff Mon Sep 17 00:00:00 2001
From: =?utf8?q?Gerg=C5=91=20Tisza?= <tgr.huwiki@gmail.com>
Date: Fri, 4 Sep 2015 23:15:03 +0000
Subject: [PATCH 1/1] Log useful error messages on SSL errors in PhpHttpRequest

Work around PHP's crappy stream error handling to extract the
OpenSSL message that gives actually useful information.

Change-Id: I9eba0f90935e25e2d07995f6181fa90b7d52ea55
---
 includes/HttpFunctions.php | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/includes/HttpFunctions.php b/includes/HttpFunctions.php
index 24c0dfc064..bc5a9570e2 100644
--- a/includes/HttpFunctions.php
+++ b/includes/HttpFunctions.php
@@ -855,6 +855,8 @@ class CurlHttpRequest extends MWHttpRequest {
 
 class PhpHttpRequest extends MWHttpRequest {
 
+	private $fopenErrors = array();
+
 	/**
 	 * @param string $url
 	 * @return string
@@ -909,6 +911,16 @@ class PhpHttpRequest extends MWHttpRequest {
 		return $certOptions;
 	}
 
+	/**
+	 * Custom error handler for dealing with fopen() errors. fopen() tends to fire multiple errors in succession, and the last one
+	 * is completely useless (something like "fopen: failed to open stream") so normal methods of handling errors programmatically
+	 * like get_last_error() don't work.
+	 */
+	public function errorHandler( $errno, $errstr ) {
+		$n = count( $this->fopenErrors ) + 1;
+		$this->fopenErrors += array( "errno$n" => $errno, "errstr$n" => $errstr );
+	}
+
 	public function execute() {
 
 		parent::execute();
@@ -987,9 +999,10 @@ class PhpHttpRequest extends MWHttpRequest {
 		}
 		do {
 			$reqCount++;
-			MediaWiki\suppressWarnings();
+			$this->fopenErrors = array();
+			set_error_handler( array( $this, 'errorHandler' ) );
 			$fh = fopen( $url, "r", false, $context );
-			MediaWiki\restoreWarnings();
+			restore_error_handler();
 
 			if ( !$fh ) {
 				// HACK for instant commons.
@@ -1035,6 +1048,10 @@ class PhpHttpRequest extends MWHttpRequest {
 		$this->setStatus();
 
 		if ( $fh === false ) {
+			if ( $this->fopenErrors ) {
+				LoggerFactory::getInstance( 'http' )->warning( __CLASS__
+					. ': error opening connection: {errstr1}', $this->fopenErrors );
+			}
 			$this->status->fatal( 'http-request-error' );
 			return $this->status;
 		}
-- 
2.20.1