Could not upload Image to WCF Rest service

问题

I am creating a WCF Rest Service to Upload Images from Mobile application. but i am getting The remote server returned an error: (400) Bad Request. can any one point me what i have done wrong. Following are my Definitions :

    [OperationContract]
    [WebInvoke(BodyStyle = WebMessageBodyStyle.Bare, UriTemplate = "/PostImage",Method ="POST")]

 PublicMessage PostImage(Upload obj);

[DataContract]
    public class Upload
    {
        [DataMember]
        public Stream File { get; set; }
    }

Service Definition :

public PublicMessage PostImage(Upload obj)
    {
        byte[] buffer = StreamToByte(obj.File);   //Function to convert the stream to byte array
     FileStream fs = new FileStream(@"D:\ShopMonkeyApp\Desert.jpg", FileMode.Create, FileAccess.ReadWrite);
        BinaryWriter bw = new BinaryWriter(fs);

        bw.Write(buffer);

        bw.Close();

        return new PublicMessage { Message = "Recieved the image on server" };
    }

Client Application :

string filePath = @"D:\ShopMonkeyApp\Desert.jpg";

        string url = "http://localhost:50268/shopmonkey.svc/PostImage/"; // Service Hosted in IIS

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

        request.Accept = "text/xml";

        request.Method = "POST";

        request.ContentType = "image/jpeg";

        using (Stream fileStream = File.OpenRead(filePath))

        using (Stream requestStream = request.GetRequestStream())
        {

            int bufferSize = 1024;

            byte[] buffer = new byte[bufferSize];

            int byteCount = 0;

            while ((byteCount = fileStream.Read(buffer, 0, bufferSize)) > 0)
            {

                requestStream.Write(buffer, 0, byteCount);

            }

        }

        string result;

        using (WebResponse response = request.GetResponse())

        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {

            result = reader.ReadToEnd();

        }

        Console.WriteLine(result);

Web Config :

 <system.serviceModel>
        <services>
      <service name="ShopMonkey.ShopMonkey" behaviorConfiguration="ServiceBehaviour">
        <!-- Service Endpoints -->
        <!-- Unless fully qualified, address is relative to base address supplied above -->
        <endpoint address ="" binding="webHttpBinding" contract="ShopMonkey.IShopMonkey" behaviorConfiguration="web">
          <!-- 
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.behaviorConfiguration="web"
          -->
        </endpoint>
      </service>
    </services>

    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehaviour">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="web">
          <webHttp/>
          <dataContractSerializer maxItemsInObjectGraph="10000000"/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

Thanks

Vijay

回答1:

Increasing the message queue length in web.config solves my issue.

<webHttpBinding>
        <binding name="streamWebHttpbinding" transferMode="Streamed"  maxReceivedMessageSize="1000000000000" receiveTimeout="01:00:00" sendTimeout="01:00:00" />
      </webHttpBinding>

Thanks to all

回答2:

If you dont have any other properties on the Upload class then change the WCF service method to have a Stream param rather than wrapping it in a class as below:

[OperationContract]
[WebInvoke(UriTemplate = "/PostImage",Method ="POST")]
PublicMessage PostImage(Stream obj);

Then you can use the WebClient class to upload a file directly as shown below:

var c = new System.Net.WebClient();
c.OpenWrite(string.Concat("http://localhost:50268/shopmonkey.svc", "/PostImage"), "POST");
c.Headers[HttpRequestHeader.ContentType] = "image/jpeg";            
return c.UploadFile(string.Concat(serviceBaseUrl, resourceUrl), filePath);

Also refer to this link.

UPDATE :

Please find the sample to get your code working below:

[OperationContract]
[WebInvoke(UriTemplate = "/PostImage",Method ="POST")]
PublicMessage PostImage(Upload obj);

[DataContract]
public class Upload
{
    [DataMember]
    public MemoryStream FileContent { get; set; }
}

Now your method that implements the PostImage looks as follows:

public PublicMessage PostImage(Upload obj)
{
        byte[] buffer = new byte[obj.FileContent.Length];
        using (FileStream ms = new FileStream(@"D:\ShopMonkeyApp\Temp\Desert.jpg", FileMode.OpenOrCreate))
        {
            obj.FileContent.Position = 0;
            int read = fileInfo.Content.Read(buffer, 0, buffer.Length);
            ms.Write(buffer, 0, read);
        }

    return new PublicMessage { Message = "Recieved the image on server" };
}

Now since our server side code is complete now moving to the client side part that uploads your file to the server as below:

    private string ClientSample()
    {
            var uploadObject = new Upload();
            Image image = Image.FromFile(@"D:\ShopMonkeyApp\Desert.jpg");
            MemoryStream ms = new MemoryStream();
            uploadObject.FileContent = new MemoryStream();
            image.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            ms.WriteTo(uploadObject.FileContent);
            ms.Close();

        string responseMessage = null;            
        var request = WebRequest.Create(http://localhost:50268/shopmonkey.svc/PostImage) as HttpWebRequest;
        if (request != null)
        {
            request.ContentType = "application/xml";
            request.Method = method;
        }

        if(method == "POST" && requestBody != null)
        {
            byte[] requestBodyBytes;
            requestBodyBytes = ToByteArrayUsingDataContractSer<Upload>(requestBody);
            request.ContentLength = requestBodyBytes.Length;
            using (Stream postStream = request.GetRequestStream())
                postStream.Write(requestBodyBytes, 0, requestBodyBytes.Length);                    
        }

        if (request != null)
        {
            var response = request.GetResponse() as HttpWebResponse;
            if(response.StatusCode == HttpStatusCode.OK)
            {
                Stream responseStream = response.GetResponseStream();
                if (responseStream != null)
                {
                    var reader = new StreamReader(responseStream);

                    responseMessage = reader.ReadToEnd();                        
                }
            }
            else
            {   
                responseMessage = response.StatusDescription;
            }
        }
    }

    private static byte[] ToByteArrayUsingDataContractSer<T>(T requestBody)
    {
        byte[] bytes = null;
        var serializer1 = new DataContractSerializer(typeof(T));            
        var ms1 = new MemoryStream();            
        serializer1.WriteObject(ms1, requestBody);
        ms1.Position = 0;
        var reader = new StreamReader(ms1);
        bytes = ms1.ToArray();
        return bytes;            
    }

NOTE: Make sure that your Upload object both on the client and server have the same namespace and properties defined so that you avoid any deserialization issues.

来源：https://stackoverflow.com/questions/11507963/could-not-upload-image-to-wcf-rest-service