asi-http-request asynchronous selector error - iphone

Question

I keep getting a very weird error when using asi-http-request when I use selectors to register callbacks for success and failure.
The following methods are used:
// Sets up a request and takes care of the stuff that needs to be for each
// and every request.
- (void) setup:(NSString *) fragment successCallback:(SEL) success_callback failureCallback:(SEL) failure_callback {
// Convert the string to a url
NSString *url = [[NSString alloc] initWithFormat:#"%#%#",
self.server.serverUrl,
fragment
];
NSURL *full_url = [NSURL URLWithString: url];
// Time to setup the request
self.curRequest = [ASIFormDataRequest requestWithURL:full_url];
[self.curRequest setDelegate:self];
[self.curRequest setDidFailSelector:success_callback];
[self.curRequest setDidFinishSelector:failure_callback];
// If we're using iphone os version 4.0
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
[self.curRequest setShouldContinueWhenAppEntersBackground:YES];
#endif
// Clean up time!
[url release];
[full_url release];
}
The register method
- (void) register_user:(NSString *) email password:(NSString *) password confirmPassword:(NSString *) confirm_password successCallback:(SEL) success_callback failureCallback:(SEL) failure_callback {
[self setup:#"/users/register"
successCallback:success_callback
failureCallback:failure_callback
];
// Setup the input to the method
[self.curRequest setPostValue:email forKey: #"email"];
[self.curRequest setPostValue:password forKey: #"password"];
[self.curRequest setPostValue:confirm_password forKey: #"confirm_password"];
NSLog(#"We got here yo :)~ %# %# %#", email, password, confirm_password);
[self.curRequest startAsynchronous];
}
Success and Failure Callbacks
- (void) registerSuccess: (ASIHTTPRequest *) request {
NSString *response = [request responseString];
NSLog(#"Response string: %s", response);
}
// Called when the http request fails. That means it could not
// reach the server for an unknown reason.
- (void) registerFailure: (ASIHTTPRequest *) request {
NSError *error = [request error];
NSLog(#"Register error: %s", [error localizedFailureReason]);
}
I invoke the register method like so:
[self.appdelegate.userModel register_user:self.emailAddress.text
password:self.password.text
confirmPassword:self.confirmPassword.text
successCallback:#selector(registerSuccess:)
failureCallback:#selector(registerFailure:)
];
The callstack and error from gdb:
2010-12-02 12:33:56.889 ProjectPrototype[2201:6003] -[__NSCFType absoluteURL]: unrecognized selector sent to instance 0x6457c60
2010-12-02 12:33:56.891 ProjectPrototype[2201:6003] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType absoluteURL]: unrecognized selector sent to instance 0x6457c60'
*** Call stack at first throw:
(
0 CoreFoundation 0x0292eb99 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x02a7e40e objc_exception_throw + 47
2 CoreFoundation 0x029306ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x028a02b6 ___forwarding___ + 966
4 CoreFoundation 0x0289fe72 _CF_forwarding_prep_0 + 50
5 CoreFoundation 0x02843b04 CFURLCopyAbsoluteURL + 100
6 CFNetwork 0x023fe5e8 _ZN11HTTPMessage10initializeEPK10__CFStringPK7__CFURLS2_ + 52
7 CFNetwork 0x023fe50c CFHTTPMessageCreateRequest + 80
8 ProjectPrototype 0x00011360 -[ASIHTTPRequest main] + 852
9 Foundation 0x000c83ca __NSThreadPerformPerform + 251
10 CoreFoundation 0x0290ffaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
11 CoreFoundation 0x0286e39b __CFRunLoopDoSources0 + 571
12 CoreFoundation 0x0286d896 __CFRunLoopRun + 470
13 CoreFoundation 0x0286d350 CFRunLoopRunSpecific + 208
14 CoreFoundation 0x02870614 CFRunLoopRun + 84
15 ProjectPrototype 0x00023b55 +[ASIHTTPRequest runRequests] + 173
16 Foundation 0x000b376c -[NSThread main] + 81
17 Foundation 0x000b36f8 __NSThread__main__ + 1387
18 libSystem.B.dylib 0x9689881d _pthread_start + 345
19 libSystem.B.dylib 0x968986a2 thread_start + 34
)
terminate called after throwing an instance of 'NSException'
I appreciate any and all help, thanks alot :)~

Answer 1

Dudester you have two serious syntax priblems:
First, each use of this is incorrect:
self.curRequest
The first time only you set request, use self.request = blah.
After that, just use [curRequest xyz]
Second serious problem,
[self.curRequest setDidFailSelector:success_callback];
[self.curRequest setDidFinishSelector:failure_callback];
You forgot the 'selector' bit, it should look more like this:
[request setDidFinishSelector:#selector(blahCommuniqueDone:)];
[request setDidFailSelector:#selector(blahCommuniqueDoneProblem:)];
(Be careful with the colons, also.) Forget about trying to pass them in as SELs. The two routines are right there in the same object. You simply point to them.
Here's a typical complete working example. If you follow this you'll have no problems. These three routines just sit in the same file.
-(void) blahCommunique
{
// it sends the string blah for pid (even if blank)
// from V5 it sends the blah as well ..
NSURL *url = [NSURL URLWithString:#"https://blah?blah"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostValue:blahAA forKey:#"blahAA"];
[request setPostValue:blahBB forKey:#"blahBB"];// new in V5
[request setPostValue:SIMPLESTRINGTHISVERSION forKey:#"version"];
#define QQ(a) [NSString stringWithFormat:#"%d", a]
[request setPostValue:QQ(vfourblahCount) forKey:#"cr"];
[request setPostValue:QQ(vfourblahCount) forKey:#"sb"];
[request setPostValue:QQ(vfourblahCount) forKey:#"so"];
[request setPostValue:QQ(vfourblahCount) forKey:#"lc"];
[request setPostValue:QQ(OLDlaunchCount) forKey:#"olc"];
#undef QQ
[request setPostValue:[[NSLocale preferredLanguages] objectAtIndex:0] forKey:#"langpref"];
[request setDelegate:self];
[request setDidFinishSelector:#selector(statsCommuniqueDone:)];
[request setDidFailSelector:#selector(statsCommuniqueDoneProblem:)];
[request startAsynchronous];
}
-(void) statsCommuniqueDone:(ASIHTTPRequest *)request
{
NSData *newStringData = [request responseData];//todo, check [incomingFloatData length]
self.factoryMessageIfAny =
[[[NSString alloc] initWithData:newStringData encoding:NSUTF8StringEncoding] autorelease];
if ( [self.factoryMessageIfAny isEqualToString:#"OK"] )
self.factoryMessageIfAny = #"";
}
-(void) statsCommuniqueDoneProblem:(ASIHTTPRequest *)request
{
// statsCommuniqueDoneProblem ... !
self.factoryMessageIfAny = #"";
}