Multiple Requests on ASIHTTPRequest - iphone

Question

I need to download three different sets of data from three different URLs. I decided to use ASIHTTPRequest. Two of the URLs are JSON feeds which I need to parse and one of them is a .txt file online that I need to store locally.
Now the example that is on ASIHTTPRequest's website for an asynchronous request shows the following:
- (IBAction)grabURLInBackground:(id)sender {
NSURL *url = [NSURL URLWithString:#"http://allseeing-i.com"];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request setDelegate:self];
[request startAsynchronous];
}
To pass multiple URLs, I can call "request" on three different URLs. But I am not sure how I would handle them in the requestFinished method. The documentation shows it as:
- (void)requestFinished:(ASIHTTPRequest *)request {
// Use when fetching text data
NSString *responseString = [request responseString];
// Use when fetching binary data
NSData *responseData = [request responseData];
}
How would this method differentiate between different requests, so that I can handle it differently?
Thank you,

Answer 1

You can differentiate between different requests by
setting the userInfo dictionary of the request
setting the didFinishSelector (and didFailSelector etc.) to different methods
using different classes as delegate
using blocks
using the request's tag property
subclass ASIHTTPRequest and override override requestFinished: and failWithError: (only recommended for complex situations)

Answer 2

You just need two snippets of code. One to 'tag' your url:
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setUserInfo:[NSDictionary dictionaryWithObjectsAndKeys:#"identifierX", #"typeOfRequest",nil]];
and another one to identify it:
if ([[[request userInfo] valueForKey:#"typeOfRequest"] isEqualToString:#"identifierX"]){
// Do here whatever you need to do for the url associated with identifierX
}
and that should be it!

Answer 3

you can set the Username and tag of req.
this is the example of imageview. req.
UIImageView *imgV=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 416)];
ASIHTTPRequest *req=[ASIHTTPRequest requestWithURL:[NSURL URLWithString:[self.arr objectAtIndex:i]]];
[req setUsername:[NSString stringWithFormat:#"%i",i]];
[req setUserInfo:[NSDictionary dictionaryWithObjectsAndKeys:imgV,#"imgV",nil]];
[req setDelegate:self];
[req startAsynchronous];
[imgV setContentMode:UIViewContentModeScaleToFill];
[imgV setClipsToBounds:YES];
[imgV setTag:kTagImageViewInScrollView];
[scr2 addSubview:imgV];
[scr2 setDelegate:self];
[imgV release]; imgV=nil;
and in requestFinished
- (void)requestFinished:(ASIHTTPRequest *)request {
[(UIImageView*)[[request userInfo] valueForKey:#"imgV"] setImage:[UIImage imageWithData:[request responseData]]];
}

Answer 4

You can check the originalURL property of ASIHTTPRequest if you have different URLS.
Or you can use [request hash] to get the NSObject hash for each object and check that later.