通过 POST 发送图片未正确发送

Question

我必须将图像发送到我无法控制的 API，以便它可以进行一些人脸识别工作。似乎我发送了图像，但我认为它没有以正确的方式完成，因为 API 响应说图像不是 JPEG 文件。任何人都可以告诉我，如果我做错了？？。我正在使用 Xamarin HttpClient Mono 实现：

MultipartFormDataContent content = new MultipartFormDataContent();
content.Headers.Add("X-Auth-Token", "eb27c17f-8bd6-4b94-bc4f-742e361b4e6a");

var imageContent = new ByteArrayContent(ultimaImagen);
content.Headers.ContentType = MediaTypeHeaderValue.Parse("image/jpeg");

content.Add(imageContent, "image", "image.jpg");

try
{
    HttpResponseMessage response = await _client.PostAsync("https://10.54.66.160:9000/3/matching/search?list_id=3c9f2623-28be-435f-a49f-4dc29c186809&limit=1", content);

    string responseContent = await response.Content.ReadAsStringAsync();
}
catch (Exception ex)
{
    throw;
}

这是 API 响应：

{
    "detail": "Failed to decode image data. Detail: Not a JPEG file: starts with 0x2d 0x2d",
    "error_code": 3001
}

Answer 1

最后，我发现了导致问题的原因。没有必要发送 MultipartFormDataContent。只有 ByteArrayContent 工作得很好。这是工作代码：

    private async void btnVerificar_Clicked(object sender, EventArgs e)
    {
        var imageContent = new ByteArrayContent(ultimaImagen);
        imageContent.Headers.Add("X-Auth-Token", "eb27c17f-8bd6-4b94-bc4f-742e361b4e6a");
        imageContent.Headers.ContentType = MediaTypeHeaderValue.Parse("image/jpeg");

        try
        {
            HttpResponseMessage response = await _client.PostAsync("https://10.54.66.160:9000/3/matching/search?list_id=3c9f2623-28be-435f-a49f-4dc29c186809&limit=1", imageContent);

            string responseContent = await response.Content.ReadAsStringAsync();

            if (response.StatusCode == System.Net.HttpStatusCode.OK)
            {
                await DisplayAlert("MobileAccessControl", responseContent, "OK");
            }
            else
            {
                await DisplayAlert("MobileAccessControl", "Read not OK.", "OK");
            }
        }
        catch (Exception ex)
        {
            throw;
        }
    }

通过 POST 发送图片未正确发送

Sending Image by POST not sending it correctly

c#

mono

dotnet-httpclient

xamarin

xamarin.forms