使用 javascript 将请求批量上传到 Google Cloud Storage

问题描述

我正在尝试使用 javascript 在批量请求中将多张图片上传到谷歌云存储.我正在使用 https://developers.google.com/storage/docs/json_api/v1/how-tos/batch#example 作为参考.

I'm trying to upload multiple images to google cloud storage in a batch request using javascript. I'm using https://developers.google.com/storage/docs/json_api/v1/how-tos/batch#example as reference.

我有一个输入文件，用户可以在其中选择多个文件，还有一个上传"btn 可以像这样上传到 GCS:

I have an input file where the user can select multiple files, and an 'upload' btn to upload to GCS like so:

<input type="file" name="fileName" id="fileInput" multiple="multiple" onchange="javascript: loadFiles()"/> 
<input type="button" name="upload-btn" id="upload" value="Upload"/>

当用户选择图像时，loadFiles"函数会创建批处理请求的正文".

When the user selects the images, the 'loadFiles' function creates the 'body' of the batch request.

var tok = <token>;
var boundary = "---======= foo_bar_baz12034245623562346 ===";
var consolidated_request = '';

function loadFiles()
{
        var input = $('fileInput');
        for (var i = 0; i < input.files.length; i++) 
        {
            var f = input.files[i];

            var reader = new FileReader();
            reader.readAsBinaryString(f);

            reader.onload = function(e){

                var fbinary = e.target.result;
                var fsize = f.size;

                var url = 'https://www.googleapis.com/upload/storage/v1beta2/b/<mybucket>/o?';
                url += 'uploadType=media&name='+f.name+ ' HTTP/1.1';

                var req = boundary + 
                '
Content-Type: application/http'+
                '
Content-Transfer-Encoding: binary'+
                '

POST ' + url +
                '
Content-Type: image/jpeg'+
                '
Content-Length: '+ f.size +
                '
Authorization: '+tok+
                '

'+ fbinary + '
';

                consolidated_request += req;
            };

        }
}

当用户点击上传时:

$('upload').onclick = function(e){

    var xhr = new XMLHttpRequest();
    xhr.open("POST", 'https://www.googleapis.com/batch', true);
    xhr.setRequestHeader("Authorization", tok);
    xhr.setRequestHeader("Content-Type", "multipart/mixed;boundary=" + boundary);
    xhr.send(consolidated_request);
 };

这是生成的 POST 示例(使用 firebug):

Here is a sample of the POST generated (using firebug):

标题:

Accept  text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Authorization   Bearer ya29.AHES6ZQgu6gFurD6y7Bo2Mao1RNCFwyqNZcwvgDZ82RXIbQ4
Content-Length  159866
Content-Type    multipart/mixed; charset=UTF-8;boundary=---======= foo_bar_baz12034245623562346 ===
Host    www.googleapis.com

主体:

 --======= foo_bar_baz12034245623562346 === 
Content-Type: application/http 
Content-Transfer-Encoding: binary 

POST https://www.googleapis.com/upload/storage/v1beta2/b/<mybucket>/o?uploadType=media&name=myimage.jpg HTTP/1.1 
Content-Type: image/jpeg 
Content-Length: 69436 
Authorization: Bearer ya29.AHES6ZQgu6gFurD6y7Bo2Mao1RNCFwyqNZcwvgDZ82RXIbQ4 

ÿØÿà�JFIF���d�d��ÿì�Ducky�����<��ÿî�Adobe�dÀ���ÿÛ�� 
...

问题是没有响应，因为我收到 400 bad request msg.这个请求有什么问题?

The problem is that there is no response because I get 400 bad request msg. What is wrong with that request?

推荐答案

你正在发送 POST 请求 -

You are sending POST request as -

POST https://www.googleapis.com/upload/storage/v1beta2/b/<mybucket>/o?uploadType=media&name=myimage.jpg HTTP/1.1 

如 使用 POST 请求上传对象中所述-

要上传媒体，您需要使用特殊的 URI.支持媒体上传的 POST 方法有两个 URI 端点:

To upload media, you use a special URI. POST methods support media uploads have two URI endpoints:

所以你需要发送 POST 请求为 -

So you need to send POST request as -

POST/upload/storage/v1beta2/b/myBucket/o?uploadType=media&name=myimage.jpg HTTP/1.1

尝试通过在 url 中省略前缀 https://www.googleapis.com 来发送 POST 请求.

Try sending POST request by omitting prefix https://www.googleapis.com from url.

谢谢

尼拉姆·夏尔马