iOS HTTP Post: Request Successful Connection;什么也不会发生

Question

我试图使用用户和密码表单的POST请求，访问它下面的web应用程序，以便用户不必填写字段或按登录键访问他们的web应用程序。根据我的nlog，连接didreceiverresponse, ConnectionDidReceiveData和ConnectionDidFinishLoading，但我在模拟器中看不到结果;我去webview，它显示空表单，等待我输入我的信息…不是我想要的。我想绕过这个表单。这里有什么遗漏或明显的错误?:

ViewDidLoad: …userr, pW等在*messageBody等之前生成

NSString *messageBody = [NSString stringWithFormat:@"UsernameFieldName=%@&PasswordFieldName=%@", usr, pW];
NSData *postData = [messageBody dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
 NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:appURL];
[theRequest setHTTPMethod:@"Post"];
[theRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
NSLog(@"%@", messageBody);
[theRequest setHTTPBody:[messageBody dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]];
[theRequest addValue: messageBody forHTTPHeaderField:@"Content-Length"];
NSLog(@"%@", theRequest);
[NSURLConnection connectionWithRequest: theRequest delegate:self];

连接方法:

- (void)connection:(NSURLConnection*)connection
didReceiveResponse:(NSURLResponse*)response
{
    NSLog(@"Connection DidReceiveResponse");
    webData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data
{
    NSLog(@"ConnectionDidReceiveData");
    webData = [NSMutableData dataWithData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection*)connection
{
    NSLog(@"Connection Did Finish Loading");
    [HelpWebView loadData:webData 
                 MIMEType:@"text/html"
         textEncodingName:@"UTF-8"
                  baseURL:nil];
}

下面是Sangony的贡献，它更接近了一点，但是要进入表单下面的web应用程序还需要一些其他的东西。

 - (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
   //KeychainItemWrapper *keychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"key" accessGroup:nil];
   //NSString *usr = [keychainItem objectForKey:(__bridge id)(kSecAttrAccount)];
   //NSString *pW = [keychainItem objectForKey:(__bridge id)(kSecValueData)];
    if ([challenge previousFailureCount] == 0) {
    NSLog(@"received authentication challenge");
    NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"?username"
                                                                password:@"?password"
                                                             persistence:NSURLCredentialPersistenceForSession];
//        NSURLCredential *newCredential = [NSURLCredential credentialWithUser:[NSString stringWithFormat:@"%@", usr]
//                                                                    password:[NSString stringWithFormat:@"%@", pW]
//                                                                persistence:NSURLCredentialPersistenceForSession];
    NSLog(@"Credential created");
    [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
    NSLog(@"Responded to authentication challenge");
}
    else {
    NSLog(@"Authentication failure");
}}

我在这里测试了上述方法:http://www.posttestserver.com/

键和值是我的表单所需要的。问题出在表单/网站/服务器上。不知道该往哪走。任何关于从哪里开始寻找的建议将是非常棒的。

Answer 1

看一下这段代码:

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
if ([challenge previousFailureCount] == 0) {
NSLog(@"received authentication challenge");
NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"?username"
                                                            password:@"?password"
                                                         persistence:NSURLCredentialPersistenceForSession];
NSLog(@"Credential created");
[[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
NSLog(@"Responded to authentication challenge");    
}
else {
NSLog(@"Authentication failure");
}