使用 ReadableStream 作为请求正文进行获取

本文介绍了使用 ReadableStream 作为请求正文进行获取的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试将 fetch 与 ReadableStream.在这个例子中，ReadableStream 应该简单地重复一些数据...".

I'm trying to use fetch with a ReadableStream. In this example, the ReadableStream should simply repeat "Some data..." indefinitely.

fetch('/', { method: 'POST', body: new ReadableStream({ pull: function(controller) { console.log('pull called!'); controller.enqueue('Some data...'); } }) });

这不起作用.pull 执行一次时，请求正文中不会发送任何数据.

This doesn't work. While pull is executed once, no data is sent in the request body.

POST / HTTP/1.1 Host: example Connection: keep-alive Content-Length: 0 Origin: example User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36 Accept: */* Referer: example/ Accept-Encoding: gzip, deflate, br Accept-Language: en-US,en;q=0.8

如何使 ReadableStream(或任何可以写入动态数据的流)可用于 fetch?

How can I make a ReadableStream (or any kind of stream where I can write dynamic data) usable with fetch?

或者，如果这还不可能，您能否指出这一点?谢谢.

Alternatively, if this isn't yet possible, could you please indicate this? Thank you.

注意:这是一个更具体的衍生问题:通过HTTP将数据从浏览器流式传输到服务器的方法

推荐答案

我们正在努力完成这项工作，请参阅 github/whatwg/fetch/pull/425 获取 Fetch 标准的 PR.完成后，您可以期望它(缓慢地)进入浏览器.

We're working on making this work, see github/whatwg/fetch/pull/425 for the PR to the Fetch Standard. Once that is done you can expect this to make its way into browsers (slowly).