使用哪个API/调用来访问基于重定向程序.googlevideo.com的视频文件?

使用谷歌镜像Api客户端检查与时间线项目关联的附件的状态。根据视频的长度,视频可能需要几分钟才能播放。奇怪的是,如果你按照302的重定向,你最终会进入Picasa域,考虑到这是视频,这有点奇怪,但这确实表明谷歌在移交视频之前正在对你的视频进行一些预处理。

这段代码是我编写的排队过程的一部分,用于处理向谷歌查询时间线项目的处理状态。来自谷歌的回调被插入到我的队列服务器中,并由工作人员拾取,该工作人员每X秒主动检查一次状态,以确定媒体是否准备就绪,如果超过循环数,则只需重新安排作业由另一个工作人员拾取。主动检查而不是在回调中返回非200代码是非常有益的,因为谷歌会对他们的api调用进行指数级回退,所以对于需要一些时间才能进入正确状态的视频,你可能会在谷歌的回调之间等待很长时间。

公共函数运行($data){ $timeline_item_id=$data['timeline_iitem_id'];

    try{
        $glassUtils = new Google_Glass_Utilities();
        $mirrorClient = new Google_Glass_MirrorClient();
        $client = $mirrorClient->get_google_api_client();
        $client->setAccessToken($data['credentials']);
        $mirror_service = new Google_MirrorService($client);
        echo "\nTIMELINE ITEM ID: " . $data['timeline_item_id'] . "\n";
        $timeline_item = $mirror_service->timeline->get($timeline_item_id);
        $caption = $timeline_item->getText();
    }catch (Exception $e){
        echo "ERROR";
        echo $e->getMessage();
        return true;
    }

    //Blocker that waits for the item to be in the active state
    //Should be faster than waiting for extra callbacks from Google
    try{
        $checkCount = 1;
        while(true){
            $blnProceed = true;

            echo "Check " . $checkCount . " of " . $this->maxSearchChecks . " for attachments on timeline item " . $timeline_item_id . "\n";

            $attachments = $mirror_service->timeline_attachments->listTimelineAttachments($timeline_item_id);
            foreach ($attachments->getItems() as $attachment) {
                echo "Attachment content type: " . $attachment->getContentType() . "\n";
                //echo "Attachment content URL: " . $attachment->getContentUrl();
                if($attachment->getIsProcessingContent() && $attachment->getContentType() == 'video/mp4'){
                    $blnProceed = false;
                }
            }

            if(!$blnProceed){
                echo "Attachments were not ready\n";
                if($checkCount == $this->maxSearchChecks){
                    echo "Job hit max checks, requeueing\n";
                    $task = new BackgroundTask();
                    $task->addTask('GlassVideoImport', $saveData);
                    $task->submit();
                    GearmanPearManager::$LOG[] = "Success";
                    return true;
                }else{
                    $checkCount += 1;
                    echo "Sleeping for " . $this->sleepSecs . " seconds before recheck\n";
                    sleep($this->sleepSecs);
                }
            }else{
                echo "GOT THE TIMELINE ITEM AND ATTACHMENT IS READY\n\n\n\n";
                //Continue
                break;
            }
        }
    }catch (Exception $e){
        echo "ERROR";
        echo $e->getMessage();
        return true;
    }

    //Got here so now go get the attachment
    try{
        $attachment = $mirror_service->timeline_attachments->get($data['timeline_item_id'], $data['timeline_attachment_id']);
        $attachmentBinary = $this->downloadAttachment($data['timeline_item_id'], $attachment);

        //Do something with the binary of the attachment


        GearmanPearManager::$LOG[] = "Success";
        return true;
    }
    catch( Exception $e ) {
        echo $e->getMessage() . "\n";
        @unlink($fileRes['localFile']);
        GearmanPearManager::$LOG[] = "Failure";
        return true;
    }
}

private function downloadAttachment($itemId, $attachment) {
    $request = new Google_HttpRequest(
    $attachment->getContentUrl(), 'GET', null, null);
    $httpRequest = Google_Client::$io->authenticatedRequest($request);
    if ($httpRequest->getResponseHttpCode() == 200) {
        return $httpRequest->getResponseBody();
    } else {
        return null;
    }
}

您应该使用GoogleAPI客户端下载附件URL,它将为您处理授权和任何重定向。请参阅中提供的示例 Timeline.attachments.get 文档,无论您使用哪种语言进行编码。