JavaScript-从json对象创建文件并在FormData中使用它 [英] JavaScript - create a file out of json object and use it in a FormData

问题描述

我正在尝试通过提供文件内容而不是提供真实文件来模拟文件上传.

I'm trying to simulate a file upload by providing file content instead of serving the real file.

所以-我正在做这样的事情:

So - I'm doing something like this:

 uploadFile(jsonContent: string, otherParams: string) {

const formData = new FormData();
formData.append('jsonContent', data, 'fileName.json');
formData.append('deal_id', dealId);

return this.http.post(this.base_url + '/files', formData);}

我没有看到内容被发送到API. 有什么建议吗?我在做什么错了?

I'm not seeing the content being sent to the API. Any advice? What I'm doing wrong?

推荐答案

好吧，我已经找到了解决方案. 在打字稿中，您可以创建new File()并将一个blob对象传递给它.

Well, I've found a solution for this. In typescript you can create new File() and pass a blob object into it.

现在，您实际上可以在客户端创建一个文件，并将其作为FormData的一部分发送.

Now u can actually create a file in your client side and send it as part as your FormData.

下面是代码:

    const st = JSON.stringify(json);

    const blob = new Blob([st], { type: 'application/json' });

    const file = new File([ blob ], 'FileName.json');

    const formData = new FormData();
    formData.append('file', file, 'FileName.json');
    formData.append('deal_id', dealId);

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