NSURLConnection method needs to be changed to pass authentication challenge - ios

Question

i have a method for http connection, which was working fine for me until the server i am trying to have an invalid ssl certificate.
Since i am using
[NSURLConnection sendSynchronousRequest:returningResponse:error]
There is no chance to pass authentication challenge by using NSURLConnection delegate methods.
Now, i need to change my service call code as fast as possible.
My method returns the data received from the connection, that is the major problem i can not easily change mine to
NSURLConnection to initWithRequest:delegate:
My service call method is as follows;
-(id)serviceCall:(NSString*)str withURL:(NSString*)serviceUrl withIdentifier:(NSString*)type
{
globalURL = [[NSURL alloc] initWithString:serviceUrl];
shouldAllowSelfSignedCert = YES;
// if(ISDEBUG) NSLog(#"%#",serviceUrl);
NSMutableDictionary* json;
NSURLResponse* response;
NSData* responseData = [NSMutableData data];
NSError* error = nil;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:globalURL];
[request setHTTPMethod:#"POST"];
[request setHTTPBody: [str dataUsingEncoding: NSUTF8StringEncoding]];
NSString* msgLength = [[NSString alloc] initWithFormat:#"%lu", (unsigned long)[str length]];
[request addValue:#"text/json; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
[request addValue:msgLength forHTTPHeaderField:#"Content-Length"];
request.timeoutInterval = 180;
responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if([type isEqualToString:#"image"])
{
if(ISDEBUG) NSLog(#"%#",responseData);
return responseData;
}
else
{
if(error)
{
UIAlertView *message = [[UIAlertView alloc] initWithTitle:NO_WS_CONNECTION message:#"" delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil];
if(ISDEBUG) NSLog(#"%#",error);
}
else
{
if(responseData !=nil)
{
json = [NSJSONSerialization
JSONObjectWithData:responseData
options:kNilOptions
error:&error];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error" message:NO_WS_CONNECTION delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[alert show];
}
}
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
if(ISDEBUG) NSLog(#"%#",responseString);
}
return json;
}
I hope i am clear enough.
What is your advise?
Thanks.

Answer 1

You should have a good reason to do it synchronously, so, I will try to help you without changing the flow.
Try wrapping the request into a class where you can implement the request using initWithRequest:delegate: and make the class return the response using block.
You will have something like:
[YourRequestClass requestWithURL:serviceURL callback:^(NSData *yourData, NSError *error){
}];
Ok, at this point you have a new tool that makes ASYNCHRONOUS requests, make the authentication challenge stuff for you and returns the result on a block.
Now, you can simply use dispatch_semaphore to block your thread until the request returns a response ....
-(id)serviceCall:(NSString*)str withURL:(NSString*)serviceUrl withIdentifier:(NSString*)type {
__block NSData *myData = nil;
dispatch_semaphore_t sem = dispatch_semaphore_create(0);
[YourRequestClass requestWithURL:serviceUrl callback:^(NSData *yourData, NSError *error){
//ignoring error (this is an example !)
myData = yourData;
dispatch_semaphore_signal(sem);
}];
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
//Use myData and make yourObject here!
return yourObject;
}
Note that It's just an example, and I'm just trying to pointing you the right way ... I didn't test this code, but I believe it should work as expected!