UIImage使用NSMutable请求上传 [英] UIImage uploading using NSMutable request

问题描述

我需要POST请求。该请求有3个参数，'email_id'，'location'和'image_data'。 'image_data'的值包含UIImage的NSData jpeg表示。该请求必须使用multipart / form-data的内容类型提交。我如何创建NSMutableRequest发布此请求？我应该如何设置边界？是整个数据包所需的边界，还是只有图像部分是足够的？

解决方案

 
 NSData * imageData = UIImageJPEGRepresentation（imageview.image，1.0）; 
 NSString * filename = @nike.jpg
 
 NSString * urlString = @http://xyz.com/file_upload/file1.php; 
 NSMutableURLRequest * request = [[[NSMutableURLRequest alloc] init] autorelease]; 
 [request setURL：[NSURL URLWithString：urlString]]; 
 [request setHTTPMethod：@POST]; 
 
 NSString * boundary = [NSString stringWithString：@----------------- 99882746641449]; 
 NSString * contentType = [NSString stringWithFormat：@multipart / form-data; boundary =％@，boundary]; 
 [request addValue：contentType forHTTPHeaderField：@Content-Type]; 
 
 NSMutableData * body = [NSMutableData data]; 
 NSMutableString * string = [[NSMutableString alloc] init]; 
 [string appendFormat：@\r\\\
\r\\\
  - ％@ \r\\\
，boundary]; 
 [string appendFormat：@Content-Disposition：form-data; name = \emailid \\r\\\
\r\\\
]; 
 [string appendFormat：@[e-mail]]; // value 
 [body appendData：[string dataUsingEncoding：NSUTF8StringEncoding]]; //加密整个身体
 
 [body appendData：[[NSString stringWithFormat：@\r\\\
  - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]] ; 
 [body appendData：[[NSString stringWithString：[NSString stringWithFormat：@Content-Disposition：form-data; name = \userfile\; filename = \％@ \\\\r \\\
，filename]] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@Content-Type：application / octet-stream\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[NSData dataWithData：imageData]]; 
 
 [body appendData：[[NSString stringWithFormat：@\r\\\
  - ％@  -  \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [string release]; 
 
 [request setHTTPBody：body]; 
 NSData * returnData = [NSURLConnection sendSynchronousRequest：request returningResponse：nil error：nil]; 
 NSString * returnString = [[NSString alloc] initWithData：returnData encoding：NSUTF8StringEncoding]; 
 

I need to POST a request. The request has 3 parameters, 'email_id' , 'location' and 'image_data'. The value for 'image_data' contains NSData jpeg representation of a UIImage. The request must be submitted using a content type of multipart/form-data. How can I create the NSMutableRequest for posting this request? How should I set the boundary? Is the boundary required for the entire packet or is it enough only for the image part?

解决方案

NSData *imageData=UIImageJPEGRepresentation(imageview.image, 1.0);
NSString *filename=@"nike.jpg"

NSString *urlString = @"http://xyz.com/file_upload/file1.php";
NSMutableURLRequest *request =[[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

    NSString *boundary = [NSString stringWithString:@"-----------------99882746641449"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

     NSMutableData *body = [NSMutableData data];
     NSMutableString * string = [[NSMutableString alloc] init];
    [string appendFormat:@"\r\n\r\n--%@\r\n", boundary];
    [string appendFormat:@"Content-Disposition: form-data; name=\"emailid\"\r\n\r\n"];
    [string appendFormat:@"[e-mail]"]; //value
    [body appendData:[string dataUsingEncoding:NSUTF8StringEncoding]]; // encrypt the entire body   

    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@\"\r\n",filename]] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];

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

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

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