如何解决使用多部分/表单数据将图像从移动应用上传到API
我有此API,我在其中接收图像以将其保存在存储服务器中。我一直在测试邮递员的功能,并且工作得很好。但是当涉及到移动应用程序时,它不会发送图像。
here you can see the Postman POST request
var content = new MultipartFormDataContent();
var stream = File.OpenRead(_mediaFile.Path);
var streamcontent = new StreamContent(stream);
content.Add(streamcontent,"picture");
var client = new HttpClient();
HttpResponseMessage response = await cliente.PostAsync($"http://localhost:200/api/.../picture",content);
string result = response.Content.ReadAsstringAsync().Result;
Response responseData = JsonConvert.DeserializeObject<Response>(result);
if (response.IsSuccessstatusCode)
{
await Application.Current.MainPage.displayAlert("Correcto","Imagen subida Correctamentel!","OK");
_mediaFile = null;
terminado.IsEnabled = true;
}
else
{
terminado.IsEnabled = true;
await Application.Current.MainPage.displayAlert("Error","Opps algo ocuirrio mal!","OK"); }
正如您在邮递员中看到的那样,密钥picture
收到图像名称。我也用curl尝试过它,并且有效:
curl -X POST "http://localhost:200/api/.../picture" -H "accept: application/json" -H "Content-Type: multipart/form-data" -F "picture=@version1.jpeg;type=image/jpeg"
解决方法
我设法使其正常运行,但是使用RestSharp库而不是HttpClient:
var client = new RestClient("192.168.0.2"); //the ip of your REST API
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type","multipart/form-data"); // I'm using multipart form data
request.AddHeader("Authorization","Bearer eyJ0eXAiOiJKV1QiLC"); // using JWT for auth
request.AddFile("pictureField","/path/to/file"); //the path depends on which device you're using
IRestResponse response = client.Execute(request);
向前迈进了很多,并且工作得很好。另外,“ pictureField”取决于API所需的字段名称,并且文件的路径不应硬编码。应该根据所选图像在设备中的位置给出该图像。
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