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POConverting from ASIHTTPRequest to AFNetworking
 

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    <p>I am converting my app routines from ASIHTTP to AFNetworking due to the unfortunate discontinuation of work on that project ... and what I found out later to be the much better and smaller codebase of AFNetworking. </p> <p>I am finding several issues. My code for ASIHTTPRequest is built as a method. This method takes a few parameters and posts the parameters to a url ... returning the resulting data. This data is always text, but in the interests of making a generic method, may sometimes be json, sometimes XML or sometimes HTML. Thus I built this method as a standalone generic URL downloader.</p> <p>My issue is that when the routine is called I <em>have</em> to wait for a response. I know all the "synchronous is bad" arguments out there...and I don't do it a lot... but for some methods I want synchronous.</p> <p>So, here is my question. My simplified ASIHTTP code is below, followed by the only way i could think of coding this in AFNetworking. The issue I have is that the AFNetworking sometimes does not for the response before returning from the method. The hint that @mattt gave of <code>[operation waitUntilFinished]</code> totally fails to hold the thread until the completion block is called... and my other method of <code>[queue waitUntilAllOperationsAreFinished]</code> does not necessarily always work either (and does NOT result in triggering the error portion of the [operation hasAcceptableStatusCode] clause). So, if anyone can help, WITHOUT The ever-present 'design it asynchronously', please do.</p> <p><strong>ASIHTTP version:</strong></p> <pre><code>- (NSString *) queryChatSystem:(NSMutableDictionary *) theDict { NSString *response = [NSString stringWithString:@""]; NSString *theUrlString = [NSString stringWithFormat:@"%@%@",kDataDomain,kPathToChatScript]; ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:theUrlString]]; for (id key in theDict) { [request setPostValue:[theDict objectForKey:key] forKey:key]; } [request setNumberOfTimesToRetryOnTimeout:3]; [request setAllowCompressedResponse:YES]; [request startSynchronous]; NSError *error = [request error]; if (! error) { response = [request responseString]; } return response; } </code></pre> <p><strong>AFNetworking version</strong></p> <pre><code>- (NSString *) af_queryChatSystem:(NSMutableDictionary *) theDict { NSMutableDictionary *theParams = [NSMutableDictionary dictionaryWithCapacity:1]; for (id key in theDict) { [theParams setObject:[theDict objectForKey:key] forKey:key]; } AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:kDataDomain]]; NSMutableURLRequest *theRequest = [httpClient requestWithMethod:@"POST" path:[NSString stringWithFormat:@"/%@",kPathToChatScript] parameters:theParams]; __block NSString *responseString = [NSString stringWithString:@""]; AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] initWithRequest:theRequest] autorelease]; operation.completionBlock = ^ { if ([operation hasAcceptableStatusCode]) { responseString = [operation responseString]; NSLog(@"hasAcceptableStatusCode: %@",responseString); } else { NSLog(@"[Error]: (%@ %@) %@", [operation.request HTTPMethod], [[operation.request URL] relativePath], operation.error); } }; NSOperationQueue *queue = [[[NSOperationQueue alloc] init] autorelease]; [queue addOperation:operation]; [queue waitUntilAllOperationsAreFinished]; [httpClient release]; return responseString; } </code></pre> <p>Thanks very much for any ideas. </p>
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