objective-c - 如何使用 ASIHTTPRequest 访问 "http://webservices.ns.nl/ns-api-stations"

Question

我正在尝试访问 XML http://webservices.ns.nl/ns-api-stations使用 ASIHTTPRequest。但是我现在用的好像不行。它说无法访问主机。所以我假设它在 ASIHTTPRequest 部分出错了？

-(void)fetchStationData {
//Method for the fetching of the data

//First lets check wheater there is an internet connection and if the host is reachable
if(internetActive) {

    //Internet is active

    //Init the parser
    parser = [[RSSParser alloc] init];

    //Set he parser context
    parser.context = context;

    //The array to het the data from 


     NSURL *url = [NSURL URLWithString:@"http://webservices.ns.nl/ns-api-stations"];
     ASIHTTPRequest *requestaccount = [ASIHTTPRequest requestWithURL:url];
     [requestaccount setUsername:@"user"];
     [requestaccount setPassword:@"password"];
    //The XML elements to fetch
    NSArray *elements = [[NSArray alloc] initWithObjects:@"name",nil];
    //The actual fetchin
    [parser fetchStationItemsForUrl:url forElements:elements];

    //Save the context ?
    [context save:nil];

    //Clean up
    [elements release]; 

}else{

    //Internet is down  :( 
    //Offline artikelen inladen

    //Dit uitvoeren op de main que
    dispatch_async(dispatch_get_main_queue(), ^ {

        UIAlertView *Notpermitted = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Er is geen verbinding mogelijk met de Mezz. Offline artikelen zijn ingeladen." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];

        [Notpermitted show];
        [Notpermitted release];

    });

}

}

Answer 1

使用ASIFormDataRequest。

NSURL *url = [NSURL URLWithString:@"http://webservices.ns.nl/ns-api-stations"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request addPostValue:@"accountname" forKey:@"username"];
[request addPostValue:@"password" forKey:@"password"];

[request setCompletionBlock:^ {
  // do something when request succeeds and credentials are ok, e.g. redirect user to the home page
}];

[request setFailedBlock:^ {
  // notify user that request failed
}];

[request startAsynchronous];