如何在Dart http库中使用StreamedRequest上传文件？ [英] How do I use StreamedRequest in Dart http library to upload a file?

问题描述

我想通过非 multipart / form-data 请求上传文件，如下所示：

I want to upload a file via a non-multipart/form-data request like this:

POST http://127.0.0.1/upload
Cache-Control: no-cache

< /path/to/file/in/disk

（我进行了测试，并成功从JetBrain上传了一个文件Rider的REST客户端连接到我的REST端点。）

(I tested and it successfully uploaded a file from JetBrain Rider's REST client to my REST endpoint.)

有一个 http 包中的StreamedRequest-class.html rel = nofollow noreferrer> StreamedRequest 类，但是我找不到任何构造函数或setter来将字节流或文件内容插入其中。

There is a StreamedRequest class in http package but I didn't find any constructor or setter to plug a byte stream or file content into it.

如何使用 StreamedRequest 要在Dart中上传文件吗？

How do I use StreamedRequest to upload a file in Dart?

推荐答案

在我的一些旧代码中，我使用

In some older code of mine I use

  /// Send a POST request to the Docker service.
  Future<http.ByteStream> _streamRequestStream(
      String path, Stream<List<int>> stream,
      {Map<String, String> query}) async {
    assert(stream != null);
    final url = serverReference.buildUri(path, query);
    final request = new http.StreamedRequest('POST', url)
      ..headers.addAll(headersTar);
    stream.listen(request.sink.add);
    final http.BaseResponse response =
        await request.send().then(http.Response.fromStream);
    if (response.statusCode < 200 || response.statusCode >= 300) {
      throw new DockerRemoteApiError(
          response.statusCode, response.reasonPhrase, null);
    }
    return (response as http.StreamedResponse).stream;
  }

这可能会做您想要的事

https：/ /github.com/bwu-dart/bwu_docker/blob/master/lib/src/remote_api.dart#L160-L178

它使用 http 包

import 'package:http/http.dart' as http;

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