Ios多部分请求没有获取内容类型在服务器端

Question

我正在做一个小型项目，我需要发送图像文件到服务器，因为我正在使用多部分请求。

下面是我的代码

UIImage *resizedImage1 = [img resizedImage:CGSizeMake(90.0f, 90.0f) interpolationQuality:kCGInterpolationHigh]; 


    NSData *imageData = [NSData dataWithData:UIImageJPEGRepresentation(resizedImage1,0.8)]; 

    NSString *urlString = @"myUrl/accounts/add_profile_image"; 
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setURL:[NSURL URLWithString:urlString]]; 
    [request setHTTPMethod:@"POST"]; 

    NSString *boundary = @"---------------------------14737809831466499882746641449"; 
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; 

     // NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; image/jpeg; boundary=%@",boundary]; 

     NSString *accessToken=[[NSUserDefaults standardUserDefaults]objectForKey:@"userAccesstoken"]; 

    NSLog(@"access token %@",accessToken); 
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; 


    [request addValue:accessToken forHTTPHeaderField:@"auth"]; 

    NSLog(@"request has %@",request); 


    // NSLog(@"imagedata has %@",imageData); 

    NSMutableData *postbody = [NSMutableData data]; 


     [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 

     // parameter v=1000 
     [postbody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
     [postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"v\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
     [postbody appendData:[[NSString stringWithFormat:@"1000\r\n"]dataUsingEncoding:NSUTF8StringEncoding]]; 


     // mz_access_token sewt token parameter 
     [postbody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
     [postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"mz_access_token\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; 
     [postbody appendData:[[NSString stringWithFormat:@"%@\r\n",accessToken]dataUsingEncoding:NSUTF8StringEncoding]]; 


     // image data parameter 
     [postbody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 
    [postbody appendData:[[NSString stringWithString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"user_image\"; filename=\"image.jpg\"\r\n\r\n"]] dataUsingEncoding:NSUTF8StringEncoding]]; 

    //[postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; 

    **[postbody appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];** 
    [postbody appendData:[NSData dataWithData:imageData]]; 
    [postbody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; 

[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; 




    NSLog(@"body has %@",postbody); 
    [request setHTTPBody:postbody]; 

     // set the content-length 
     NSString *postLength = [NSString stringWithFormat:@"%d", [postbody length]]; 
     [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; 

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; 
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; 

    NSLog(@"%@", returnString); 

    NSError *errorReturned = nil; 
    NSError *error = nil; 

    NSURLResponse *theResponse =[[NSURLResponse alloc]init]; 


    //check netwrok 

    NSData *data = [NSURLConnection sendSynchronousRequest:request 
             returningResponse:&theResponse 
                error:&errorReturned]; 

    if(data) 
    { 
     //parsing json 
     // again converting into ns dictionary object 

     NSDictionary *jsonArray = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: &error]; 
     //NSLog(@"post data %@",postbody); 
     // NSLog(@"response of web ser %@ :\n %@",name,jsonArray); 

     NSLog(@"Response data %@",jsonArray); 

//  return jsonArray; 

    }else{ 
     NSLog(@"error %@",error); 
    } 
// return [[NSDictionary alloc]init]; 

    }); 

这是我的Web服务请求。 我设置的内容类型像

[postbody appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]]; 

，但仍然在服务器端我得到@内容类型= nill * 在我们用ROR的webservice *

服务器端请帮我解决这个问题。 在此先感谢..

Answer 1

您应该设置由头参数的内容类型

[request setValue:@"image/jpeg" forHTTPHeaderField:@"Content-Type"]; 

请进行更改。

Answer 2

对于每个多部分/表单元素，您需要设置合适的Content-Type，例如，以下为文本参数：

[postbody appendData:[[NSString stringWithFormat:@"Content-Type: text/plain;charset=utf-8"] dataUsingEncoding:NSUTF8StringEncoding]];