/* * MenuTunes * AudioscrobblerController * Audioscrobbler Support Class * * Original Author : Kent Sutherland * Responsibility : Kent Sutherland * * Copyright (c) 2005 iThink Software. * All Rights Reserved * */ #import "AudioscrobblerController.h" #import "PreferencesController.h" #import #import #define AUDIOSCROBBLER_ID @"tst" #define AUDIOSCROBBLER_VERSION [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"] static AudioscrobblerController *_sharedController = nil; @implementation AudioscrobblerController + (AudioscrobblerController *)sharedController { if (!_sharedController) { _sharedController = [[AudioscrobblerController alloc] init]; } return _sharedController; } - (id)init { if ( (self = [super init]) ) { _handshakeCompleted = NO; _md5Challenge = nil; _postURL = nil; /*_handshakeCompleted = YES; _md5Challenge = @"rawr"; _postURL = [NSURL URLWithString:@"http://audioscrobbler.com/"];*/ _delayDate = [[NSDate date] retain]; _responseData = nil; _tracks = [[NSMutableArray alloc] init]; _submitTracks = [[NSMutableArray alloc] init]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAudioscrobblerNotification:) name:nil object:self]; } return self; } - (void)dealloc { [_md5Challenge release]; [_postURL release]; [_responseData release]; [_submitTracks release]; [_tracks release]; [_delayDate release]; [super dealloc]; } - (void)attemptHandshake { [self attemptHandshake:NO]; } - (void)attemptHandshake:(BOOL)force { if (_handshakeCompleted && !force) { return; } //Delay if we haven't met the interval time limit NSTimeInterval interval = [_delayDate timeIntervalSinceNow]; if (interval > 0) { ITDebugLog(@"Audioscrobbler: Delaying handshake attempt for %i seconds", interval); [self performSelector:@selector(attemptHandshake) withObject:nil afterDelay:interval + 1]; return; } NSString *user = [[NSUserDefaults standardUserDefaults] stringForKey:@"audioscrobblerUser"]; if (!_handshakeCompleted && user) { NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://post.audioscrobbler.com/?hs=true&p=1.1&c=%@&v=%@&u=%@", AUDIOSCROBBLER_ID, AUDIOSCROBBLER_VERSION, user]]; _currentStatus = AudioscrobblerRequestingHandshakeStatus; _responseData = [[NSMutableData alloc] init]; [NSURLConnection connectionWithRequest:[NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:15] delegate:self]; } } - (BOOL)handshakeCompleted { return _handshakeCompleted; } - (void)submitTrack:(NSString *)title artist:(NSString *)artist album:(NSString *)album length:(int)length { ITDebugLog(@"Audioscrobbler: Adding a new track to the submission queue."); NSDictionary *newTrack = [NSDictionary dictionaryWithObjectsAndKeys:title, @"title", artist, @"artist", (album == nil) ? @"" : album, @"album", [NSString stringWithFormat:@"%i", length], @"length", [[NSDate date] descriptionWithCalendarFormat:@"%Y-%m-%d %H:%M:%S" timeZone:nil locale:nil], @"time", nil, nil]; [_tracks addObject:newTrack]; [self submitTracks]; } - (void)submitTracks { if (!_handshakeCompleted) { [self attemptHandshake:NO]; return; } NSString *user = [[NSUserDefaults standardUserDefaults] stringForKey:@"audioscrobblerUser"], *passString = [PreferencesController getKeychainItemPasswordForUser:user]; char *pass = (char *)[passString UTF8String]; if (passString == nil) { ITDebugLog(@"Audioscrobbler: Access denied to user password"); return; } NSTimeInterval interval = [_delayDate timeIntervalSinceNow]; if (interval > 0) { ITDebugLog(@"Audioscrobbler: Delaying track submission for %f seconds", interval); [self performSelector:@selector(submitTracks) withObject:nil afterDelay:interval + 1]; return; } int i; NSMutableString *requestString; NSString *authString, *responseHash = @""; unsigned char *buffer; EVP_MD_CTX ctx; ITDebugLog(@"Audioscrobbler: Submitting queued tracks"); if ([_tracks count] == 0) { ITDebugLog(@"Audioscrobbler: No queued tracks to submit."); return; } //Build the MD5 response string we send along with the request buffer = malloc(EVP_MD_size(EVP_md5())); EVP_DigestInit(&ctx, EVP_md5()); EVP_DigestUpdate(&ctx, pass, strlen(pass)); EVP_DigestFinal(&ctx, buffer, NULL); for (i = 0; i < 16; i++) { responseHash = [responseHash stringByAppendingFormat:@"%0.2x", buffer[i]]; } free(buffer); buffer = malloc(EVP_MD_size(EVP_md5())); char *cat = (char *)[[responseHash stringByAppendingString:_md5Challenge] UTF8String]; EVP_DigestInit(&ctx, EVP_md5()); EVP_DigestUpdate(&ctx, cat, strlen(cat)); EVP_DigestFinal(&ctx, buffer, NULL); responseHash = @""; for (i = 0; i < 16; i++) { responseHash = [responseHash stringByAppendingFormat:@"%0.2x", buffer[i]]; } free(buffer); authString = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[NSString stringWithFormat:@"u=%@&s=%@", user, responseHash], NULL, NULL, kCFStringEncodingUTF8); requestString = [[NSMutableString alloc] initWithString:authString]; [authString release]; //We can only submit ten tracks at a time for (i = 0; (i < [_tracks count]) && (i < 10); i++) { NSDictionary *nextTrack = [_tracks objectAtIndex:i]; NSString *artistEscaped, *titleEscaped, *albumEscaped, *timeEscaped, *ampersand = @"&"; //Escape each of the individual parameters we're sending artistEscaped = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[nextTrack objectForKey:@"artist"], NULL, (CFStringRef)ampersand, kCFStringEncodingUTF8); titleEscaped = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[nextTrack objectForKey:@"title"], NULL, (CFStringRef)ampersand, kCFStringEncodingUTF8); albumEscaped = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[nextTrack objectForKey:@"album"], NULL, (CFStringRef)ampersand, kCFStringEncodingUTF8); timeEscaped = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[nextTrack objectForKey:@"time"], NULL, (CFStringRef)ampersand, kCFStringEncodingUTF8); [requestString appendString:[NSString stringWithFormat:@"&a[%i]=%@&t[%i]=%@&b[%i]=%@&m[%i]=&l[%i]=%@&i[%i]=%@", i, artistEscaped, i, titleEscaped, i, albumEscaped, i, i, [nextTrack objectForKey:@"length"], i, timeEscaped]]; //Release the escaped strings [artistEscaped release]; [titleEscaped release]; [albumEscaped release]; [timeEscaped release]; [_submitTracks addObject:nextTrack]; } ITDebugLog(@"Audioscrobbler: Sending track submission request"); //Create and send the request NSMutableURLRequest *request = [[NSURLRequest requestWithURL:_postURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:15] mutableCopy]; NSLog(@"Posting Audioscrobbler URL request: %@", requestString); [request setHTTPMethod:@"POST"]; [request setHTTPBody:[requestString dataUsingEncoding:NSUTF8StringEncoding]]; _currentStatus = AudioscrobblerSubmittingTracksStatus; _responseData = [[NSMutableData alloc] init]; [NSURLConnection connectionWithRequest:request delegate:self]; [requestString release]; [request release]; //If we have tracks left, submit again after the interval seconds } - (void)handleAudioscrobblerNotification:(NSNotification *)note { if ([[note name] isEqualToString:@"AudioscrobblerHandshakeComplete"]) { if ([_tracks count] > 0) { [self performSelector:@selector(submitTracks) withObject:nil afterDelay:2]; } } } #pragma mark - - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { ITDebugLog(@"Audioscrobbler: Connection error \"%@\"", error); } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [_responseData appendData:data]; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSString *string = [[NSString alloc] initWithData:_responseData encoding:NSASCIIStringEncoding]; NSArray *lines = [string componentsSeparatedByString:@"\n"]; NSString *responseAction = nil; if ([lines count] > 0) { responseAction = [lines objectAtIndex:0]; } ITDebugLog(@"Audioscrobbler: Response %@", string); NSLog(@"Audioscrobbler: Response %@", string); if (_currentStatus == AudioscrobblerRequestingHandshakeStatus) { if ([lines count] < 2) { //We have a protocol error } if ([responseAction isEqualToString:@"UPTODATE"] || (([responseAction length] > 5) && [[responseAction substringToIndex:5] isEqualToString:@"UPDATE"])) { if ([lines count] >= 4) { _md5Challenge = [[lines objectAtIndex:1] retain]; _postURL = [[NSURL alloc] initWithString:[lines objectAtIndex:2]]; _handshakeCompleted = YES; [[NSNotificationCenter defaultCenter] postNotificationName:@"AudioscrobblerHandshakeComplete" object:self]; } else { //We have a protocol error } } else if (([responseAction length] > 5) && [[responseAction substringToIndex:5] isEqualToString:@"FAILED"]) { ITDebugLog(@"Audioscrobbler: Handshake failed (%@)", [responseAction substringFromIndex:6]); //We have a error } else if ([responseAction isEqualToString:@"BADUSER"]) { ITDebugLog(@"Audioscrobbler: Bad user name"); //We have a bad user } else { ITDebugLog(@"Audioscrobbler: Handshake failed, protocol error"); //We have a protocol error } } else if (_currentStatus == AudioscrobblerSubmittingTracksStatus) { if ([responseAction isEqualToString:@"OK"]) { ITDebugLog(@"Audioscrobbler: Submission successful, clearing queue."); [_tracks removeObjectsInArray:_submitTracks]; [_submitTracks removeAllObjects]; if ([_tracks count] > 0) { ITDebugLog(@"Audioscrobbler: Tracks remaining in queue, submitting remaining tracks"); [self performSelector:@selector(submitTracks) withObject:nil afterDelay:2]; } } else if ([responseAction isEqualToString:@"BADAUTH"]) { ITDebugLog(@"Audioscrobbler: Bad password"); //Bad auth } else if (([responseAction length] > 5) && [[responseAction substringToIndex:5] isEqualToString:@"FAILED"]) { ITDebugLog(@"Audioscrobbler: Submission failed (%@)", [responseAction substringFromIndex:6]); //Failed } } //Handle the final INTERVAL response if (([[lines objectAtIndex:[lines count] - 2] length] > 9) && [[[lines objectAtIndex:[lines count] - 2] substringToIndex:8] isEqualToString:@"INTERVAL"]) { int seconds = [[[lines objectAtIndex:[lines count] - 2] substringFromIndex:9] intValue]; ITDebugLog(@"Audioscrobbler: INTERVAL %i", seconds); [_delayDate release]; _delayDate = [[NSDate dateWithTimeIntervalSinceNow:seconds] retain]; } else { ITDebugLog(@"No interval response."); //We have a protocol error } [string release]; [_responseData release]; } @end