Question

是的，所以我一直致力于通过标头进行基本身份验证，并通过HTTP Post传递一些变量。这是一个终端应用程序。

这就是我的代码：

import 'package:http/http.dart' as http;
import 'dart:io';
void main() {
  var url = "http://httpbin.org/post";
  var client = new http.Client();
  var request = new http.Request('POST', Uri.parse(url));
  var body = {'content':'this is a test', 'email':'john@doe.com', 'number':'441276300056'};
  request.headers[HttpHeaders.CONTENT_TYPE] = 'application/json; charset=utf-8';
  request.headers[HttpHeaders.AUTHORIZATION] = 'Basic 021215421fbe4b0d27f:e74b71bbce';
  request.body = body;
  var future = client.send(request).then((response) => response.stream.bytesToString().then((value) => print(value.toString()))).catchError((error) => print(error.toString()));
}

我使用httpbin作为回音服务器，所以它告诉我我传入的是什么。如果我没有通过身体，或者如果我传递一个字符串，我的代码可以正常工作身体。

显然是因为http.Request中的body属性只接受字符串，我试图将地图传递给它。

我可以将其转换为字符串，它可能会有效，但我仍然认为我的代码可以改进。不是从语法的角度，也不是从处理未来的方式来看，但我不确定使用http.dart是正确的做法。

有人能指出我正确的方向吗？

提前致谢。

Answer 1

JSON 是一个字符串。您需要将地图编码为JSON并将其作为String传递。

您可以使用bodyFields代替body来传递地图这样，您的content-type就会固定为"application/x-www-form-urlencoded"。

post的DartDoc说：

/// If [body] is a Map, it's encoded as form fields using [encoding]. The
/// content-type of the request will be set to
/// `"application/x-www-form-urlencoded"`; this cannot be overridden.

我之前能够以这种方式发送JSON数据

return new http.Client()
  .post(url, headers: {'Content-type': 'application/json'},
      body: JSON.encoder.convert({"distinct": "users","key": "account","query": {"active":true}}))
      .then((http.Response r) => r.body)
      .whenComplete(() => print('completed'));

修改

import 'package:http/http.dart' as http; import 'dart:io'; void main() { var url = "http://httpbin.org/post"; var client = new http.Client(); var request = new http.Request('POST', Uri.parse(url)); var body = {'content':'this is a test', 'email':'john@doe.com', 'number':'441276300056'}; // request.headers[HttpHeaders.CONTENT_TYPE] = 'application/json; charset=utf-8'; request.headers[HttpHeaders.AUTHORIZATION] = 'Basic 021215421fbe4b0d27f:e74b71bbce'; request.bodyFields = body; var future = client.send(request).then((response) => response.stream.bytesToString().then((value) => print(value.toString()))).catchError((error) => print(error.toString())); }

生成

{ "args": {}, "data": "", "files": {}, "form": { "content": "this is a test", "email": "john@doe.com", "number": "441276300056" }, "headers": { "Accept-Encoding": "gzip", "Authorization": "Basic 021215421fbe4b0d27f:e74b71bbce", "Connection": "close", "Content-Length": "63", "Content-Type": "application/x-www-form-urlencoded; charset=utf-8", "Host": "httpbin.org", "User-Agent": "Dart/1.5 (dart:io)", "X-Request-Id": "b108713b-d746-49de-b9c2-61823a93f629" }, "json": null, "origin": "91.118.62.43", "url": "http://httpbin.org/post" }

使用标题和正文执行HTTP Post

1 个答案: