NSMutableURLRequest POST数据实现

   本文转自  http://www.999dh.net/article/iphone_ios_art/29.html  转载请注明，谢谢！

    今天晚上是个值得庆祝的日子啊，我在iphone上对网络编码又懂了一些。
   
    原来在MTK上，通过HTTP协议 把数据POST到服务器，最近想把他弄到iphone上来，经过几天的努力，终于有效果了。大概的代码如下：

    NSString * strURL = @"http://211.xxx.2.123:8080/terminal/gprs";//这里IP地址为了保密
    
    NSString * str = [[NSString alloc]initWithString:@"[2012112618351111,T21,60,16@111111111111111111@222222222222222222@333333333333333333]"];
    NSData * postData = [str dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    NSString * strLen = [NSString stringWithFormat:@"%d",[postData length]];
    
    NSMutableURLRequest * request = [[[NSMutableURLRequest alloc]init]autorelease];
    [request setURL:[NSURL URLWithString:strURL]];
    [request setHTTPMethod:@"POST"];
    [request setValue:strLen forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"18213997120" forHTTPHeaderField:@"User Agent"];
    [request setValue:@"multipart/form-data" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"zh-cn" forHTTPHeaderField:@"Accept-Language"];
    [request setValue:@"*/*" forHTTPHeaderField:@"Accept"];
    //本来在这里还有一个 设置HOST的代码的，但是这个代码有的话 会返回 400 badrequest错误
    //具体原因暂时不清楚，以后再说
   //[request setValue:strURL forHTTPHeaderField:@"Host"];
    [request setHTTPBody:postData];
        
    NSURLResponse *response = nil;
    
    NSError *error = nil;
    
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];  
    NSLog(@"====%@",returnString);  
    
    if( nil == error )
    {
        NSLog(@"nil == error");
    }
    else
    {
        NSLog(@"nil != error");
    }
    
    if( nil == response )
    {
        NSLog(@"nil == response");
    }
    else
    {
        NSLog(@"nil != response");
        
        int statusCode = [(NSHTTPURLResponse*)response statusCode];
        NSLog(@"code:%d",statusCode);
    }


庆祝下   庆祝下~~~~