WCF 从 AFNetworking 接收流答案

【问题标题】：WCF Receive stream from AFNetworkingWCF 从 AFNetworking 接收流
【发布时间】：2015-01-05 10:04:06
【问题描述】：

我写了一个ios客户端发送*.jpg到服务器，服务器使用WCF。现在我可以从客户端获取流，但问题是我不知道从哪里获取文件名和 mimeType。另一个问题是我发现传递给服务器的流比客户端的大，当我测试时，我发现服务器传递的比客户端的大156字节，当我写这个尖叫到jpeg文件，它无法打开。所以我认为这个流已经包含了信息。我检查了AFNETwork的源代码，我发现这些代码：

  - (void)appendPartWithFileData:(NSData *)data
                      name:(NSString *)name
                  fileName:(NSString *)fileName
                  mimeType:(NSString *)mimeType
{
NSParameterAssert(name);
NSParameterAssert(fileName);
NSParameterAssert(mimeType);

NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
[mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\";    filename=\"%@\"", name, fileName] forKey:@"Content-Disposition"];
[mutableHeaders setValue:mimeType forKey:@"Content-Type"];

[self appendPartWithHeaders:mutableHeaders body:data];
}

  - (void)appendPartWithHeaders:(NSDictionary *)headers
                     body:(NSData *)body
{
    NSParameterAssert(body);

AFHTTPBodyPart *bodyPart = [[AFHTTPBodyPart alloc] init];
bodyPart.stringEncoding = self.stringEncoding;
bodyPart.headers = headers;
bodyPart.boundary = self.boundary;
bodyPart.bodyContentLength = [body length];
bodyPart.body = body;

[self.bodyStream appendHTTPBodyPart:bodyPart];
}

我认为它设置了文件名和图像数据，它们都已设置到流中。

我们可以从这个流中获取这些信息吗？

我的wcf主代码，其他和这个question一样

  public void SaveImage(Stream request)
    {

        Exception e = new Exception(string.Format(" begin to save"));
        WcfLog.Log(logLevel.Info, e);
        string upLoadFolder = @"C:\images";


        string fileName ="testpig.jpg";
        string filePath = null;          
        Stream sourceStream = request;

        FileStream targetStream = null;
        if (!sourceStream.CanRead)
        {
            WcfLog.Log( "can not read this stream!");
        }

        if (filePath == null) filePath = @"otherFile\";

        if (!filePath.EndsWith("\\")) filePath += "\\";

        if (!upLoadFolder.EndsWith("\\")) upLoadFolder += "\\";

        upLoadFolder = upLoadFolder + filePath;

        if (!Directory.Exists(upLoadFolder))
        {
            Directory.CreateDirectory(upLoadFolder);
        }

        int filesize = 0;

        string filePathAndName = Path.Combine(upLoadFolder, fileName);



        try
        {
             using (targetStream = new FileStream(filePathAndName, FileMode.Create, FileAccess.Write, FileShare.None))
              {
                  const int bufferLen = 4096;
                  Byte[] buffer = new Byte[bufferLen];
                  int count = 0;

                  while ((count = sourceStream.Read(buffer, 0, bufferLen)) > 0)
                  {
                      targetStream.Write(buffer, 0, count);
                      filesize += count;
                  }
                  targetStream.Close();
                  sourceStream.Close();
                  WcfLog.Log( string.Format("filename:{0} filesize:{1} save!", fileName, filesize));



              } 

        }
        catch (Exception ex)
        {
            WcfLog.Log(logLevel.Error, ex);

        }`

和 Objective-c 代码：

+(void)upLoadImage:(UIImage *)image Urlstring:(NSString *)path name:(NSString *)name successBlock:(void (^)(AFHTTPRequestOperation *,id responseObject))success failureBlcok:(void (^)(AFHTTPRequestOperation *, NSError *))failure processBlock:(void (^)(CGFloat))process{

NSData *imagedata=UIImageJPEGRepresentation(image, 1.0);
if ((float)imagedata.length/1024>1000) {
    imagedata=UIImageJPEGRepresentation(image, 1024*1000/(float)imagedata.length);
}
NSLog(@"imagedata size :%lu",imagedata.length);
NSString *filename=@"test.jpg";
AFHTTPRequestOperationManager *AFManager=[[AFHTTPRequestOperationManager alloc]initWithBaseURL:[NSURL URLWithString:@FileTranUrl]];
AFHTTPRequestOperation *operation=[AFManager POST:path parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formdata){[formdata appendPartWithFileData:imagedata name:name fileName:filename mimeType:@"image/jpeg"];} success:^(AFHTTPRequestOperation *operation, id responseObject) {
    if (success) {
        success(operation,responseObject);
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    if (failure) {
        failure(operation,error);
    }
}];
[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
    CGFloat progressValue = (float)totalBytesWritten/(float)totalBytesExpectedToWrite;
    if (process) {
        process(progressValue);
    }
}];
[operation start];
}

【问题讨论】：

标签： c# ios wcf afnetworking

【解决方案1】：

现在我知道我遇到的问题了。我需要对流进行编码并将其拆分以找到我需要的关键工作。我确信 afnetwork 已将内容类型、文件名发送到流中。我找到了这张海报：here

如果你想看到更多这样的问题，谷歌关键词：multipart/form-data and wcf

【讨论】：