从一台服务器上获取jQuery/JS GET，将接收到的文件发布到另一台服务器上 [英] jQuery/JS GET from one server, POST received file to another

问题描述

我们最近购买了许可，以在我们的代码中使用其他人的Web服务.基本上，我需要能够从一台服务器检索文件，然后立即将该文件发布到另一台服务器，并查看响应文本.

We have recently purchased licenses for the use of some other people's web services in our code. Basically, I need to be able to retrieve a file from one server then immediately POST that file to another server, and view the response text.

这似乎很容易，因为我已经分别完成了许多这些请求.我正在尝试从自己的服务器获取一个简单文件并将其发布到此API进行测试.

It seems easy enough since I've done these requests separately a lot. I'm trying to test with getting a simple file from my own server and post it to this API.

这是我正在使用的当前代码.

Here's the current code I'm working with.

我要发布的API基于fileModel参数返回错误，因此似乎我没有适当的数据"变量(例如File).我假设GET调用返回的数据变量不是真正的文件"类型，因此发布失败.

The API I'm posting through returns an error based on the fileModel parameter, so it would seem like I don't have a proper "data" variable (e.g. File). I'm assuming that the data variable being returned by the GET call is not a true "File" type so the post is failing as a result.

我不确定如何正确创建从GET返回的文件"对象，以便将其正确发布为文件.

I'm not sure how to properly create a "File" object that's returned from GET so that it posts correctly as a file.

$.get( "http://localhost/myfile.png", function( data ) {
    var sendData = {
        token : "mytokenhere",
        fileModel : data,
        title : "Cylinder1",
        description: "Cylinder1",
        private: true,
    };
    $.post( "https://api.url.com/", sendData)
        .done(function( data ) {
            alert( "Data Loaded: " + data );
        })
        .fail( function(xhr, textStatus, errorThrown) {
            alert(xhr.responseText);
        });
});

推荐答案

使用$.不能真正获得二进制响应.必须使用纯XMLHttpRequest

You can't really get a binary response with $.get you'll have to use plain XMLHttpRequest

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function(){
    if (this.readyState == 4 && this.status == 200){
        //this.response is what you're looking for
        var data = new FormData();
        data.append('fileModel', this.response);
        data.append('description', "Cylinder1");
        data.append('private', true);
        data.append('title', "Cylinder1");
        data.append('token', "mytokenhere");
        $.ajax({
            url:'',
            type: 'post',
            data: data,
            contentType: false,
            processData: false
        })
        .done(function( data ) {
            alert( "Data Loaded: " + data );
        })
        .fail( function(xhr, textStatus, errorThrown) {
            alert(xhr.responseText);
        });
    }
}
xhr.open('GET', 'http://localhost/myfile.png');
xhr.responseType = 'blob';
xhr.send();      

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