Remove ability to override the entire HttpDownloader instance in PRE_FILE_DOWNLOAD events

src/Composer/Downloader/FileDownloader.php

@@ -106,21 +106,19 @@ class FileDownloader implements DownloaderInterface, ChangeReportInterface
 
         $io = $this->io;
         $cache = $this->cache;
-        $originalHttpDownloader = $this->httpDownloader;
+        $httpDownloader = $this->httpDownloader;
         $eventDispatcher = $this->eventDispatcher;
         $filesystem = $this->filesystem;
         $self = $this;
 
         $accept = null;
         $reject = null;
-        $download = function () use ($io, $output, $originalHttpDownloader, $cache, $eventDispatcher, $package, $fileName, $path, &$urls, &$accept, &$reject) {
+        $download = function () use ($io, $output, $httpDownloader, $cache, $eventDispatcher, $package, $fileName, $path, &$urls, &$accept, &$reject) {
             $url = reset($urls);
 
-            $httpDownloader = $originalHttpDownloader;
             if ($eventDispatcher) {
                 $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $httpDownloader, $url['processed']);
                 $eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
-                $httpDownloader = $preFileDownloadEvent->getHttpDownloader();
             }
 
             $checksum = $package->getDistSha1Checksum();

src/Composer/Plugin/PreFileDownloadEvent.php

@@ -25,7 +25,7 @@ class PreFileDownloadEvent extends Event
     /**
      * @var HttpDownloader
      */
-    private $rfs;
+    private $httpDownloader;
 
     /**
      * @var string
@@ -36,13 +36,13 @@ class PreFileDownloadEvent extends Event
      * Constructor.
      *
      * @param string           $name         The event name
-     * @param HttpDownloader $rfs
+     * @param HttpDownloader $httpDownloader
      * @param string           $processedUrl
      */
-    public function __construct($name, HttpDownloader $rfs, $processedUrl)
+    public function __construct($name, HttpDownloader $httpDownloader, $processedUrl)
     {
         parent::__construct($name);
-        $this->rfs = $rfs;
+        $this->httpDownloader = $httpDownloader;
         $this->processedUrl = $processedUrl;
     }
 
@@ -51,15 +51,7 @@ class PreFileDownloadEvent extends Event
      */
     public function getHttpDownloader()
     {
-        return $this->rfs;
-    }
-
-    /**
-     * @param HttpDownloader $rfs
-     */
-    public function setHttpDownloader(HttpDownloader $rfs)
-    {
-        $this->rfs = $rfs;
+        return $this->httpDownloader;
     }
 
     /**

src/Composer/Repository/ComposerRepository.php

@@ -898,15 +898,12 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
         $retries = 3;
         while ($retries--) {
             try {
-                $httpDownloader = $this->httpDownloader;
-
                 if ($this->eventDispatcher) {
                     $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $this->httpDownloader, $filename);
                     $this->eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
-                    $httpDownloader = $preFileDownloadEvent->getHttpDownloader();
                 }
 
-                $response = $httpDownloader->get($filename, $this->options);
+                $response = $this->httpDownloader->get($filename, $this->options);
                 $json = $response->getBody();
                 if ($sha256 && $sha256 !== hash('sha256', $json)) {
                     // undo downgrade before trying again if http seems to be hijacked or modifying content somehow
@@ -989,12 +986,9 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
         $retries = 3;
         while ($retries--) {
             try {
-                $httpDownloader = $this->httpDownloader;
-
                 if ($this->eventDispatcher) {
                     $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $this->httpDownloader, $filename);
                     $this->eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
-                    $httpDownloader = $preFileDownloadEvent->getHttpDownloader();
                 }
 
                 $options = $this->options;
@@ -1002,7 +996,7 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
                     $options['http']['header'] = (array) $options['http']['header'];
                 }
                 $options['http']['header'][] = array('If-Modified-Since: '.$lastModifiedTime);
-                $response = $httpDownloader->get($filename, $options);
+                $response = $this->httpDownloader->get($filename, $options);
                 $json = $response->getBody();
                 if ($json === '' && $response->getStatusCode() === 304) {
                     return true;
@@ -1053,12 +1047,11 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
     private function asyncFetchFile($filename, $cacheKey, $lastModifiedTime = null)
     {
         $retries = 3;
-        $httpDownloader = $this->httpDownloader;
 
+        $httpDownloader = $this->httpDownloader;
         if ($this->eventDispatcher) {
             $preFileDownloadEvent = new PreFileDownloadEvent(PluginEvents::PRE_FILE_DOWNLOAD, $this->httpDownloader, $filename);
             $this->eventDispatcher->dispatch($preFileDownloadEvent->getName(), $preFileDownloadEvent);
-            $httpDownloader = $preFileDownloadEvent->getHttpDownloader();
         }
 
         $options = $lastModifiedTime ? array('http' => array('header' => array('If-Modified-Since: '.$lastModifiedTime))) : array();