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“操作无法完成。通过对等机重置连接。“在iOS上使用nsurlconnection

ios objective-c iphone

Matthew Mitchell · 技术社区 · 16 年前

我正在努力将Post数据发送到服务器并接收正确的响应。我开始使用sethttpbody,但当我没有得到某些post数据的正确服务器响应时,我转到了sethttpbodystream,并且我读到sethttpbody在早期的iOS版本上有内存泄漏。问题是sethttpbodystream导致错误-“操作无法完成。”通过对等机重置连接”。

代码如下:

NSMutableURLRequest * request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"secret but correct url goes here"] cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:10.0];
        [request setHTTPMethod: @"POST"];
        [request setHTTPBodyStream: [NSInputStream inputStreamWithData: [[NSString stringWithFormat:@"username=%@&password=%@&score=%i",[(NSString*)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,  (CFStringRef)ogl_view->username, NULL,  CFSTR("?=&+"), kCFStringEncodingUTF8) autorelease],[(NSString*)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,  (CFStringRef)text_field.text, NULL,  CFSTR("?=&+"), kCFStringEncodingUTF8) autorelease],ogl_view->score[0]] dataUsingEncoding:NSUnicodeStringEncoding]]];
        NSURLConnection * connection = [[NSURLConnection alloc] initWithRequest: request delegate:self];
        if (connection){
            received_data = [[NSMutableData data] retain];
            ogl_view->section = CURLING_PROCESS_CREDENTIALS;
        }else{
            ogl_view->section = CURLING_LOGIN_OR_REGISTER;
            UIAlertView *connection_alert = [[UIAlertView alloc] initWithTitle:@"Error" message: @"Can't connect to server" delegate:self cancelButtonTitle:@"Close" otherButtonTitles: nil];
            [connection_alert show];
            [connection_alert release];
        }

我可以验证服务器是否正常,当我尝试使用Web浏览器时,它是否正常工作。

有人能让我正确地使用http和post方法发送数据吗?

谢谢你的帮助。

1 回复 | 直到 15 年前

João Caxaria 15 年前

尝试使用此项(使用您自己的值):

    NSString* post = @"username=myUser&password=myPass&score=20"; //customize this
    NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding];
    NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    NSURL *url = [NSURL URLWithString:@"http://my.request.com"]; //customize this
    [request setURL:url];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:postData]; 
    [request setTimeoutInterval:timeout];
    [[NSURLConnection alloc] initWithRequest:request delegate:self];

然后需要实现nsurlConnectionDelegate方法:

    - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
    - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)remoteData;
    - (void)connectionDidFinishLoading:(NSURLConnection *)connection;
    - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error;

最后,请记住释放nsurlconnection。

编辑:没看到你写的sethttpbody泄漏…从未见过这种情况。不管怎样,这里有一些代码应该可以工作…