如何阅读从Htt的prequest所有二元，在飞镖？ [英] How to read all binary from a HttpRequest, in Dart?

问题描述

的Htt prequest 在飞镖，是一个流＆LT;名单＆LT; INT＆GT;＆GT; ，如何获得二进制内容列表＆LT; INT＆GT;

HttpRequest in Dart, is a Stream<List<int>>, how to get the binary content as List<int>?

我试过：

request.toList().then((data) {
    // but data is a List<List<int>> !!!
});

看来我不应该使用了ToList 。什么是正确的方法，我应该使用？

It seems I should not use toList. What's the correct method I should use?

推荐答案

要做到这一点是设置为的 onDone 回调单程听（ ）。当它已经完成了回调被触发。然后，只需创建整数列表，并添加到它每次每个事件：

One way to do it is to set the onDone callback for listen(). The callback is fired when it has completed. Then just create a list of integers and add to it per every event:

List<int> data = [];
request.listen(data.addAll, onDone: () {
  // `data` has here the entire contents.
});

另外，这里是一个班轮：

Alternatively, here's a one-liner:

request.reduce((p, e) => p..addAll(e)).then((data) {
  // `data` has here the entire contents.  
});

我还将添加安德斯·约翰森的使用 BytesBuilder 类，我想你应该preFER的伟大的提示：

I'll also add Anders Johnsen's great tip of using BytesBuilder class, which I think you should prefer:

 request.fold(new BytesBuilder(), (b, d) => b..add(d)).then((builder) {
   var data = builder.takeBytes();
 });

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