RESTful WCF服务图像上传问题

1 namespace Uploader 2 { 3 using System; 4 using System.IO; 5 using System.ServiceModel; 6 using System.ServiceModel.Description; 7 using System.ServiceModel.Web; 8 using System.Drawing; 9 using System.Drawing.Imaging; 10 using System.Net; 11 using System.Xml; 12 13 [ServiceContract(Namespace = "http://Uploader")] 14 public interface IUploaderService 15 { 16 [OperationContract, WebInvoke(Method = "POST",UriTemplate = "File/{fileName}")] 17 bool UploadFile(string fileName, Stream fileContents); 18 } 19 20 [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)] 21 public class UploaderService : IUploaderService 22 { 23 public bool UploadFile(string fileName, Stream fileContents) 24 { 25 return true; 26 } 27 } 28 29 class Program 30 { 31 static void Main() 32 { 33 var host = new 34 ServiceHost(typeof (UploaderService), 35 new Uri("http://localhost:8080/Uploader")); 36 host.AddServiceEndpoint("Uploader.IUploaderService", 37 new WebHttpBinding(), "").Behaviors.Add(new WebHttpBehavior()); 38 try 39 { 40 host.Open(); 41 Console.WriteLine(host.BaseAddresses[0].AbsoluteUri + " running."); 42 Console.WriteLine(); 43 var uri = "http://localhost:8080/Uploader/file.jpg"; 44 var req = WebRequest.Create(uri) as HttpWebRequest; 45 if (req != null) 46 { 47 req.Method = "POST"; 48 req.ContentType = "image/jpeg"; 49 var reqStream = req.GetRequestStream(); 50 51 var imageStream = new MemoryStream(); 52 using (var i = Image.FromFile(@"c:\photo.jpg")) 53 i.Save(imageStream, ImageFormat.Jpeg); 54 55 var imageArray = imageStream.ToArray(); 56 reqStream.Write(imageArray, 0, imageArray.Length); 57 reqStream.Close(); 58 var resp = (HttpWebResponse)req.GetResponse(); 59 var r = new XmlTextReader(resp.GetResponseStream()); 60 if (r.Read()) 61 { 62 Console.WriteLine(r.ReadString()); 63 } 64 } 65 Console.WriteLine("Press  to quit."); 66 Console.ReadLine(); 67 } 68 catch (Exception ex) 69 { 70 Console.WriteLine(ex.Message); 71 Console.ReadKey(); 72 } 73 finally 74 { 75 if (host.State == CommunicationState.Faulted) 76 host.Abort(); 77 else 78 host.Close(); 79 } 80 } 81 } 82 } 83 84 

嗨，希望你能帮忙….

我正在创建一个简单的应用程序（可能是网页），它将具有简单的用户界面并将从外部设备上传文件，当用户将设备插入PC时，应用程序/网页将通过autorun.inf启动。 Web服务将执行将文件链接到管理系统等的复杂工作。这将使不能使用文件浏览的IT文盲用户能够将文件提交到管理系统……！

我遇到的问题是，当内容类型是图像/ jpeg时，我的RESTful服务器给了我400错误。它适用于text / plain或text / xml（参见博客文章）

谢谢J

Answer 1

您可以尝试覆盖任何内容类型，并使用IOperationBehavior将所有文件上载为application / octet-stream或text / plain。

 public class WebContentTypeAttribute : Attribute, IOperationBehavior, IDispatchMessageFormatter { private IDispatchMessageFormatter innerFormatter; public string ContentTypeOverride { get; set; } public WebContentTypeAttribute(string contentTypeOverride) { this.ContentTypeOverride = contentTypeOverride; } // IOperationBehavior public void Validate(OperationDescription operationDescription) { } public void ApplyDispatchBehavior(OperationDescription operationDescription, DispatchOperation dispatchOperation) { innerFormatter = dispatchOperation.Formatter; dispatchOperation.Formatter = this; } public void ApplyClientBehavior(OperationDescription operationDescription, ClientOperation clientOperation) { } public void AddBindingParameters(OperationDescription operationDescription, BindingParameterCollection bindingParameters) { } // IDispatchMessageFormatter public void DeserializeRequest(Message message, object[] parameters) { if (message == null) return; if (string.IsNullOrEmpty(ContentTypeOverride)) return; var httpRequest = (HttpRequestMessageProperty)message.Properties[HttpRequestMessageProperty.Name]; httpRequest.Headers["Content-Type"] = ContentTypeOverride; } public Message SerializeReply(MessageVersion messageVersion, object[] parameters, object result) { return innerFormatter.SerializeReply(messageVersion, parameters, result); } } 

而且您必须修改您的服务合同，使其看起来像这样

 [OperationContract] [WebInvoke(Method = "POST",UriTemplate = "File/{fileName}")] [WebContentType("application/octet-stream")] bool UploadFile(string fileName, Stream fileContents); 

虽然，如果您从网页上传，数据是否不会以多部分/表格数据格式发布？