Question

我具有上载图像的功能，但是服务器未收到任何信息，并且得到500状态代码。我确定服务器正常。当我从邮递员发送发帖请求时，它起作用！这是我的功能：

uploadPrescriptionToAll(File file, data) async {

  String convertedFilePath = await convertImage(file);

   String token = await getToken();

   Response response;
   Dio dio = new Dio();
   dio.options.baseUrl = "http://x.x.x.x:x";

   FormData formData = new FormData.from({
     "image":
         new UploadFileInfo(new File(convertedFilePath), "image.jpg"),
     "data": data,
   });
   try {
     response = await dio.post("/api/images",
         data: formData,
         options: Options(headers: {
           "Authorization": token,
           "Content-Type": "multipart/form-data"
         }));
   } catch (e) {
     print("Error Upload: " + e.toString());
   }
   print("Response Upload:" + response.toString());
}

我如何正确发布文件（表单数据）？还有另一种方法吗？

Answer 1

尝试使用该文件：

 var head = {"Authorization": "Bearer ${token} "};
    var response = await dio.post(api,
          data: formData, options: Options(headers: head));

  FormData formData =  new FormData.from({"file": new UploadFileInfo(image, image.path)});

Answer 2

使用 Dio 使用以下方法非常简单： FormData.fromMap（）

searchCityByName(String city) async {
     Dio dio = new Dio(); 
    var a = {"city": city};
    var res = await dio.post(apiSearchState, data:FormData.fromMap(a));
  }

Answer 3

简而言之，您应该将 Map<String, dynamic> 对象传递给 dio.post() 的 data 字段。例如：

response = await dio.post("/api/images",
     data: {"image": "image.jpg", "data": data});

请参阅：https://github.com/flutterchina/dio/issues/88 了解详情

扑-为什么dio发布空表格数据？

3 个答案: