如何在颤动中向 API 服务器发送请求 POST 消息？

Posted 2023-02-23

【中文标题】如何在颤动中向 API 服务器发送请求 POST 消息？

【英文标题】：How to send request POST message to API server in flutter?

【发布时间】：2019-06-01 19:14:26

【问题描述】：

我使用 NAVER API 来检测人脸，所以我必须向 API 服务器发送 POST 消息。消息格式如下。

[HTTP Request Header]
POST /v1/vision/face HTTP/1.1  
Host: openapi.naver.com  
Content-Type: multipart/form-data; boundary=boundary-text  
X-Naver-Client-Id: Client ID
X-Naver-Client-Secret: Client Secret  
Content-Length: 96703  

--boundary-text  
Content-Disposition: form-data; name="image"; filename="test.jpg"  
Content-Type: image/jpeg  

image binary data  
--boundary-text--  

检查格式后，我使用MultipartRequest 和MultipartFile 编写。

Future<void> getFaceData() async 
  final Uri url = Uri.parse('https://openapi.naver.com/v1/vision/face');
  final request = http.MultipartRequest('POST',url);
  request.fields['X-Naver-Client-Id'] = 'client key(I added real value)';
  request.fields['X-Naver-Client-Secret'] = 'client secret(I added real value)';
  request.files.add(await http.MultipartFile.fromPath(
    'image',
    _image.path,
    contentType: MediaType('multipart','form-data')
  ));

  http.StreamedResponse response = await request.send();
  print(response.statusCode);

但此代码得到 401 错误，即 UNAUTHORIZED。问题是什么？我该如何解决？

【参考方案1】：

X-Naver... 值是 HTTP 标头，而不是 表单字段。像这样添加它们：

 request.headers['X-Naver-Client-Id'] = 'client key(I added real value)';
 request.headers['X-Naver-Client-Secret'] = 'client secret(I added real value)';