我建立基于科尔多瓦/ PhoneGap的使用的multipart / form-data发布请求，上传文件到服务器的Web应用程序。

I am building a web app based on Cordova/PhoneGap which uploads files to a server using a multipart/form-data POST request.

以下code适用于黑莓10：

The following code works on BlackBerry 10:

var postRequest = new XMLHttpRequest();
if (postRequest.overrideMimeType) {
    postRequest.overrideMimeType('text/xml');
}
var fd = new FormData();
fd.append('param1', 'value1');
[...]
fd.append('file', file, fileName);
postRequest.open('POST', url, true);
postRequest.send(fd);

不过在iPhone上运行iOS6的的文件对象由字符串替换 [Object对象当发送到服务器，类似于在Safari转换文件设定为[对象对象]当插入FORMDATA。如何解决？。

However on an iPhone running iOS6 the File object is replaced by the String [Object object] when sent to the server, similar to the issue described in Safari converts File to [object Object] when inserted into FormData. How to fix?.

在对比的是问题，我不是克隆的File对象。我的应用程序调用通过打开的...菜单从其他应用程序的文件。我通过一个本地文件系统的URI，我解决您在使用 window.resolveLocalFileSystemURI（）。这工作完全和我收到的第一一FileEntry的，并从一个File对象。然而，它显示该对象未正确识别和传送该请求到服务器时，其的toString（）方法被调用，而不是

In contrast to that issue I am not cloning the File object. My app is invoked with documents from other apps via the "Open in..." menu. I am passed a local file system URI which I resolve using window.resolveLocalFileSystemURI(). This works perfectly and I receive first a FileEntry and from that a File object. However it appears this object is not recognized correctly and its toString() method is called instead when transmitting the request to the server.

这是iOS上的错误吗？或者，也许在PhoneGap的一个bug创建文件对象时？什么是最好的解决办法？

Is this a bug on iOS? Or maybe a bug in PhoneGap when creating the File object? What is the best workaround?

更新：我只是碰到了Android上的同样的问题，因此，此问题似乎并没有具体到iOS

UPDATE: I just ran into the same problem on Android, so this problem doesn't seem to be specific to iOS.

推荐答案

适用于iOS可能的解决方法似乎是读取使用的FileReader文件，从它构造一个新的Blob对象，然后将本到服务器，而不是：

A possible workaround for iOS seems to be to read the file using FileReader, construct a new Blob object from it and then transmit this to the server instead:

var reader = new FileReader();
reader.onloadend = function(evt) {
     var fileBlob = new Blob([evt.target.result], { 'type' : fileType });
};
reader.readAsArrayBuffer(file);

这里所使用的一滴构造需要iOS 6.0或更高版本。通过这种方式，数据被完全发送到作为预定的服务器

The Blob constructor used here requires iOS 6.0 or higher. This way the data was completely transmitted to the server as intended.

一个斑点可以在Android被创建，也使用WebKitBlobBuilder。不幸的是这并没有在我的测试解决Android上的问题。

A Blob can be created on Android, too, using WebKitBlobBuilder. Unfortunately this didn't fix the problem on Android during my tests.