AudioscrobblerController.m

   1 /*
   2  *      MenuTunes
   3  *  AudioscrobblerController
   4  *    Audioscrobbler Support Class
   5  *
   6  *  Original Author : Kent Sutherland <kent.sutherland@ithinksw.com>
   7  *   Responsibility : Kent Sutherland <kent.sutherland@ithinksw.com>
   8  *
   9  *  Copyright (c) 2005 iThink Software.
  10  *  All Rights Reserved
  11  *
  12  */
  13
  14 #import "AudioscrobblerController.h"
  15 #import <openssl/evp.h>
  16
  17 static AudioscrobblerController *_sharedController = nil;
  18
  19 @implementation AudioscrobblerController
  20
  21 + (void)load
  22 {
  23         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
  24         [[AudioscrobblerController sharedController] submitTrack:@"Stairway To Heaven" artist:@"Led Zeppelin" album:@"Led Zeppelin IV" length:483];
  25         [pool release];
  26 }
  27
  28 + (AudioscrobblerController *)sharedController
  29 {
  30         if (!_sharedController) {
  31                 _sharedController = [[AudioscrobblerController alloc] init];
  32         }
  33         return _sharedController;
  34 }
  35
  36 - (id)init
  37 {
  38         if ( (self = [super init]) ) {
  39                 _handshakeCompleted = NO;
  40                 _responseData = nil;
  41                 _md5Challenge = nil;
  42                 _postURL = nil;
  43                 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAudioscrobblerNotification:) name:nil object:self];
  44         }
  45         return self;
  46 }
  47
  48 - (void)dealloc
  49 {
  50         [_md5Challenge release];
  51         [_postURL release];
  52         [_responseData release];
  53         [super dealloc];
  54 }
  55
  56 - (void)attemptHandshake
  57 {
  58         NSString *version = [[[NSBundle bundleWithPath:[[NSWorkspace sharedWorkspace] fullPathForApplication:@"iTunes.app"]] infoDictionary] objectForKey:@"CFBundleVersion"], *user = @"Tristrex";
  59         NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://post.audioscrobbler.com/?hs=true&p=1.1&c=tst&v=%@&u=%@", version, user]];
  60         NSURLConnection *connection;
  61
  62         _currentStatus = AudioscrobblerRequestingHandshakeStatus;
  63         _responseData = [[NSMutableData alloc] init];
  64         connection = [NSURLConnection connectionWithRequest:[NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30] delegate:self];
  65 }
  66
  67 - (BOOL)handshakeCompleted
  68 {
  69         return _handshakeCompleted;
  70 }
  71
  72 - (void)submitTrack:(NSString *)title artist:(NSString *)artist album:(NSString *)album length:(int)length
  73 {
  74         if (!_handshakeCompleted) {
  75                 [self attemptHandshake];
  76                 return;
  77         }
  78
  79         //What we eventually want is a submission list that sends backlogs also
  80         NSMutableURLRequest *request = [[NSURLRequest requestWithURL:_postURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30] mutableCopy];
  81         NSString *responseHash = @"", *requestBody;
  82
  83         char *pass = "waffles";
  84         unsigned char *buffer;
  85         EVP_MD_CTX ctx;
  86         int i;
  87
  88         buffer = malloc(EVP_MD_size(EVP_md5()));
  89
  90         EVP_DigestInit(&ctx, EVP_md5());
  91         EVP_DigestUpdate(&ctx, pass, strlen(pass));
  92         EVP_DigestFinal(&ctx, buffer, NULL);
  93
  94         for (i = 0; i < 16; i++) {
  95                 responseHash = [responseHash stringByAppendingFormat:@"%0.2x", buffer[i]];
  96         }
  97
  98         free(buffer);
  99         buffer = malloc(EVP_MD_size(EVP_md5()));
 100         char *cat = (char *)[[responseHash stringByAppendingString:_md5Challenge] UTF8String];
 101         EVP_DigestInit(&ctx, EVP_md5());
 102         EVP_DigestUpdate(&ctx, cat, strlen(cat));
 103         EVP_DigestFinal(&ctx, buffer, NULL);
 104
 105         responseHash = @"";
 106         for (i = 0; i < 16; i++) {
 107                 responseHash = [responseHash stringByAppendingFormat:@"%0.2x", buffer[i]];
 108         }
 109         free(buffer);
 110
 111         requestBody = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)[NSString stringWithFormat:@"u=%@&s=%@&a[0]=%@&t[0]=%@&b[0]=%@&m[0]=&l[0]=%i&i[0]=%@", @"Tristrex", responseHash, artist, title, album, length, [[NSDate date] descriptionWithCalendarFormat:@"%Y-%m-%d %H:%M:%S" timeZone:nil locale:nil]], NULL, NULL, kCFStringEncodingUTF8);
 112         [request setHTTPMethod:@"POST"];
 113         [request setHTTPBody:[requestBody dataUsingEncoding:NSUTF8StringEncoding]];
 114         _currentStatus = AudioscrobblerSubmittingTrackStatus;
 115         _responseData = [[NSMutableData alloc] init];
 116         [NSURLConnection connectionWithRequest:request delegate:self];
 117         CFRelease(requestBody);
 118         [request release];
 119 }
 120
 121 - (void)handleAudioscrobblerNotification:(NSNotification *)note
 122 {
 123         if ([[note name] isEqualToString:@"AudioscrobblerHandshakeComplete"]) {
 124                 [[AudioscrobblerController sharedController] submitTrack:@"Good Times Bad Times" artist:@"Led Zeppelin" album:@"Led Zeppelin I" length:166];
 125         }
 126 }
 127
 128 #pragma mark -
 129
 130 - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
 131 {
 132         NSLog(@"Failed with an error: %@", error);
 133 }
 134
 135 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
 136 {
 137         [_responseData appendData:data];
 138 }
 139
 140 - (void)connectionDidFinishLoading:(NSURLConnection *)connection
 141 {
 142         NSString *string = [[NSString alloc] initWithData:_responseData encoding:NSASCIIStringEncoding];
 143
 144         if (_currentStatus == AudioscrobblerRequestingHandshakeStatus) {
 145                 NSArray *lines = [string componentsSeparatedByString:@"\n"];
 146                 NSString *responseAction;
 147                 if ([lines count] < 2) {
 148                         //We have an error
 149                 }
 150                 responseAction = [lines objectAtIndex:0];
 151                 if ([responseAction isEqualToString:@"UPTODATE"]) {
 152                         if ([lines count] >= 4) {
 153                                 _md5Challenge = [[lines objectAtIndex:1] retain];
 154                                 _postURL = [[NSURL alloc] initWithString:[lines objectAtIndex:2]];
 155                                 _handshakeCompleted = YES;
 156                                 [[NSNotificationCenter defaultCenter] postNotificationName:@"AudioscrobblerHandshakeComplete" object:self];
 157                         } else {
 158                                 //We have an error
 159                         }
 160                         //Something
 161                 } else if (([responseAction length] > 6) && [[responseAction substringToIndex:5] isEqualToString:@"UPDATE"]) {
 162                         //Something plus update action
 163                 } else if (([responseAction length] > 6) && [[responseAction substringToIndex:5] isEqualToString:@"FAILED"]) {
 164                         //We have an error
 165                 } else if ([responseAction isEqualToString:@"BADUSER"]) {
 166                         //We have an error
 167                 } else {
 168                         //We have an error
 169                 }
 170         } else if (_currentStatus == AudioscrobblerSubmittingTrackStatus) {
 171                 NSLog(string);
 172         }
 173
 174         [string release];
 175 }
 176
 177 @end