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
  44                 //Test variables
  45                 _md5Challenge = @"315EFDA9FDA6A24B421BE991511DEE90";
  46                 _postURL = [[NSURL alloc] initWithString:@"http://62.216.251.205:80/protocol_1.1"];
  47                 _handshakeCompleted = YES;
  48                 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAudioscrobblerNotification:) name:nil object:self];
  49         }
  50         return self;
  51 }
  52
  53 - (void)dealloc
  54 {
  55         [_md5Challenge release];
  56         [_postURL release];
  57         [_responseData release];
  58         [super dealloc];
  59 }
  60
  61 - (void)attemptHandshake
  62 {
  63         NSString *version = [[[NSBundle bundleWithPath:[[NSWorkspace sharedWorkspace] fullPathForApplication:@"iTunes.app"]] infoDictionary] objectForKey:@"CFBundleVersion"], *user = @"Tristrex";
  64         NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://post.audioscrobbler.com/?hs=true&p=1.1&c=tst&v=%@&u=%@", version, user]];
  65         NSURLConnection *connection;
  66
  67         _currentStatus = AudioscrobblerRequestingHandshakeStatus;
  68         _responseData = [[NSMutableData alloc] init];
  69         connection = [NSURLConnection connectionWithRequest:[NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30] delegate:self];
  70 }
  71
  72 - (BOOL)handshakeCompleted
  73 {
  74         return _handshakeCompleted;
  75 }
  76
  77 - (void)submitTrack:(NSString *)title artist:(NSString *)artist album:(NSString *)album length:(int)length
  78 {
  79         if (!_handshakeCompleted) {
  80                 [self attemptHandshake];
  81                 return;
  82         }
  83
  84         //What we eventually want is a submission list that sends backlogs also
  85         NSMutableURLRequest *request = [[NSURLRequest requestWithURL:_postURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30] mutableCopy];
  86         NSString *responseHash, *requestBody;
  87
  88         char *pass = "waffles";
  89         unsigned char *buffer, *buffer2, buffer3[16];
  90         EVP_MD_CTX ctx;
  91         int i;
  92
  93         buffer = malloc(EVP_MD_size(EVP_md5()));
  94         //buffer3 = malloc(EVP_MD_size(EVP_md5()));
  95
  96         EVP_DigestInit(&ctx, EVP_md5());
  97         EVP_DigestUpdate(&ctx, pass, strlen(pass));
  98         EVP_DigestUpdate(&ctx, [_md5Challenge UTF8String], strlen([_md5Challenge UTF8String]));
  99         EVP_DigestFinal(&ctx, buffer, NULL);
 100
 101         for (i = 0; i < 16; i++) {
 102                 char hex1, hex2;
 103                 hex1 = toascii(48+ (buffer[i] / 16));
 104                 if (hex1 > 57) {
 105                         hex1 = hex1 + 39;
 106                 }
 107                 hex2 = toascii(48 + (buffer[i] % 16));
 108                 if (hex2 > 57) {
 109                         hex2 = hex2 + 39;
 110                 }
 111
 112                 buffer3[i] = hex1;
 113                 buffer3[i + 1] = hex2;
 114         }
 115
 116         NSLog(@"%s", buffer3);
 117
 118         /*unsigned char *cat = strcat(buffer3, [[_md5Challenge lowercaseString] UTF8String]);
 119
 120         EVP_DigestInit(&ctx, EVP_md5());
 121         EVP_DigestUpdate(&ctx, cat, strlen(cat));
 122         EVP_DigestFinal(&ctx, buffer2, NULL);
 123
 124         for (i = 0; i < 16; i++) {
 125                 char hex1, hex2;
 126                 hex1 = toascii(48+ (buffer2[i] / 16));
 127                 if (hex1 > 57) {
 128                         hex1 = hex1 + 39;
 129                 }
 130                 hex2 = toascii(48 + (buffer2[i] % 16));
 131                 if (hex2 > 57) {
 132                         hex2 = hex2 + 39;
 133                 }
 134                 buffer3[i] = hex1;
 135                 buffer3[i + 1] = hex2;
 136         }
 137         NSLog(@"%s", buffer3);*/
 138
 139         if ([NSString respondsToSelector:@selector(stringWithCString:encoding:)]) {
 140                 responseHash = [NSString stringWithCString:buffer3 encoding:NSASCIIStringEncoding];
 141         } else {
 142                 responseHash = [NSString stringWithCString:buffer3 length:strlen(buffer)];
 143         }
 144
 145         requestBody = [NSString stringWithFormat:@"u=%@&s=%@&a[0]=%@&t[0]=%@&b[0]=%@&m[0]=&l[0]=%i&i[0]=%@", @"Tristrex", @"rawr", responseHash, title, album, length, [[NSDate date] descriptionWithCalendarFormat:@"%Y-%m-%d %H:%M:%S" timeZone:nil locale:nil]];
 146         [request setHTTPMethod:@"POST"];
 147         [request setHTTPBody:[requestBody dataUsingEncoding:NSUTF8StringEncoding]];
 148
 149         _currentStatus = AudioscrobblerSubmittingTrackStatus;
 150         _responseData = [[NSMutableData alloc] init];
 151         [NSURLConnection connectionWithRequest:request delegate:self];
 152         [request release];
 153 }
 154
 155 - (void)handleAudioscrobblerNotification:(NSNotification *)note
 156 {
 157         if ([[note name] isEqualToString:@"AudioscrobblerHandshakeComplete"]) {
 158                 [[AudioscrobblerController sharedController] submitTrack:@"Stairway To Heaven" artist:@"Led Zeppelin" album:@"Led Zeppelin IV" length:483];
 159         }
 160 }
 161
 162 #pragma mark -
 163
 164 - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
 165 {
 166         NSLog(@"Failed with an error: %@", error);
 167 }
 168
 169 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
 170 {
 171         [_responseData appendData:data];
 172 }
 173
 174 - (void)connectionDidFinishLoading:(NSURLConnection *)connection
 175 {
 176         NSString *string = [[NSString alloc] initWithData:_responseData encoding:NSASCIIStringEncoding];
 177
 178         if (_currentStatus == AudioscrobblerRequestingHandshakeStatus) {
 179                 NSArray *lines = [string componentsSeparatedByString:@"\n"];
 180                 NSString *responseAction;
 181                 if ([lines count] < 2) {
 182                         //We have an error
 183                 }
 184                 responseAction = [lines objectAtIndex:0];
 185                 if ([responseAction isEqualToString:@"UPTODATE"]) {
 186                         if ([lines count] >= 4) {
 187                                 _md5Challenge = [[lines objectAtIndex:1] retain];
 188                                 _postURL = [[NSURL alloc] initWithString:[lines objectAtIndex:2]];
 189                                 _handshakeCompleted = YES;
 190                                 NSLog(@"%@", _md5Challenge);
 191                                 [[NSNotificationCenter defaultCenter] postNotificationName:@"AudioscrobblerHandshakeComplete" object:self];
 192                         } else {
 193                                 //We have an error
 194                         }
 195                         //Something
 196                 } else if (([responseAction length] > 6) && [[responseAction substringToIndex:5] isEqualToString:@"UPDATE"]) {
 197                         //Something plus update action
 198                 } else if (([responseAction length] > 6) && [[responseAction substringToIndex:5] isEqualToString:@"FAILED"]) {
 199                         //We have an error
 200                 } else if ([responseAction isEqualToString:@"BADUSER"]) {
 201                         //We have an error
 202                 } else {
 203                         //We have an error
 204                 }
 205         } else if (_currentStatus == AudioscrobblerSubmittingTrackStatus) {
 206                 NSLog(string);
 207         }
 208
 209         [string release];
 210 }
 211
 212 @end