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• Streaming to the Android MediaPlayer

  - by Rob Szumlakowski

  Hi. I'm trying to write a light-weight HTTP server in my app to feed dynamically generated MP3 data to the built-in Android MediaPlayer. I am not permitted to store my content on the SD card. My input data is essentially of an infinite length. I tell MediaPlayer that its data source should basically be something like "http://localhost/myfile.mp3". I've a simple server set up that waits for MediaPlayer to make this request. However, MediaPlayer isn't very cooperative. At first, it makes an HTTP GET and tries to grab the whole file. It times out if we try and simply dump data into the socket so we tried using the HTTP Range header to write data in chunks. MediaPlayer doesn't like this and doesn't keep requesting the subsequent chunks. Has anyone had any success streaming data directly into MediaPlayer? Do I need to implement an RTSP or Shoutcast server instead? Am I simply missing a critical HTTP header? What strategy should I use here? Rob Szumlakowski

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• How to program a neural network for chess?

  - by marco92w

  Hello! I want to program a chess engine which learns to make good moves and win against other players. I've already coded a representation of the chess board and a function which outputs all possible moves. So I only need an evaluation function which says how good a given situation of the board is. Therefore, I would like to use an artificial neural network which should then evaluate a given position. The output should be a numerical value. The higher the value is, the better is the position for the white player. My approach is to build a network of 385 neurons: There are six unique chess pieces and 64 fields on the board. So for every field we take 6 neurons (1 for every piece). If there is a white piece, the input value is 1. If there is a black piece, the value is -1. And if there is no piece of that sort on that field, the value is 0. In addition to that there should be 1 neuron for the player to move. If it is White's turn, the input value is 1 and if it's Black's turn, the value is -1. I think that configuration of the neural network is quite good. But the main part is missing: How can I implement this neural network into a coding language (e.g. Delphi)? I think the weights for each neuron should be the same in the beginning. Depending on the result of a match, the weights should then be adjusted. But how? I think I should let 2 computer players (both using my engine) play against each other. If White wins, Black gets the feedback that its weights aren't good. So it would be great if you could help me implementing the neural network into a coding language (best would be Delphi, otherwise pseudo-code). Thanks in advance!

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• Issues with cross-domain uploading

  - by meder

  I'm using a django plugin called django-filebrowser which utilizes uploadify. The issue I'm having is that I'm hosting uploadify.swf on a remote static media server, whereas my admin area is on my django server. At first, the browse button wouldn't invoke my browser's upload. I fixed this by modifying the sameScriptAccess to always instead of sameDomain. Now the progress bar doesn't move at all, I probably have to enable some server setting for cross domain file uploading, or most likely actually host a separate upload script on my media server. I thought I could solve this by adding a crossdomain.xml to enable any site at the root of both servers, but that doesn't seem to solve it. $(document).ready(function() { $('#id_file').uploadify({ 'uploader' : 'http://media.site.com:8080/admin/filebrowser/uploadify/uploadify.swf', 'script' : '/admin/filebrowser/upload_file/', 'scriptData' : {'session_key': '...'}, 'checkScript' : '/admin/filebrowser/check_file/', 'cancelImg' : 'http://media.site.com:8080/admin/filebrowser/uploadify/cancel.png', 'auto' : false, 'folder' : '', 'multi' : true, 'fileDesc' : '*.html;*.py;*.js;*.css;*.jpg;*.jpeg;*.gif;*.png;*.tif;*.tiff;*.mp3;*.mp4;*.wav;*.aiff;*.midi;*.m4p;*.mov;*.wmv;*.mpeg;*.mpg;*.avi;*.rm;*.pdf;*.doc;*.rtf;*.txt;*.xls;*.csv;', 'fileExt' : '*.html;*.py;*.js;*.css;*.jpg;*.jpeg;*.gif;*.png;*.tif;*.tiff;*.mp3;*.mp4;*.wav;*.aiff;*.midi;*.m4p;*.mov;*.wmv;*.mpeg;*.mpg;*.avi;*.rm;*.pdf;*.doc;*.rtf;*.txt;*.xls;*.csv;', 'sizeLimit' : 10485760, 'scriptAccess' : 'always', //'scriptAccess' : 'sameDomain', 'queueSizeLimit' : 50, 'simUploadLimit' : 1, 'width' : 300, 'height' : 30, 'hideButton' : false, 'wmode' : 'transparent', translations : { browseButton: 'BROWSE', error: 'An Error occured', completed: 'Completed', replaceFile: 'Do you want to replace the file', unitKb: 'KB', unitMb: 'MB' } }); $('input:submit').click(function(){ $('#id_file').uploadifyUpload(); return false; }); }); The page I'm viewing this on is http://site.com/admin/filebrowser/browse on port 80.

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• NSFILEMANAGER CRASHING IN APP DELEGATE

  - by theiphoneguy

  I have this code in a method called from applicationDidFinishLaunching. It works in the simulator, but crashes on the iPhone. There are about 1,600 2KB mp3 files being copied in this operation. If I try to instantiate the app multiple times, it will eventually copy more each time until the app eventually will start without crashing. I am releasing everything I allocate. I have about 20GB disk space free on the iPhone. If I progressively comment out code and run it on the iPhone, the copyItemAtPath seems to be the suspect. (void)createCopyOfAudioFiles:(BOOL)force { @try { NSError *error; NSString *component; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSFileManager *fileManager = [[NSFileManager alloc] init]; NSEnumerator *enumerator = [[[NSBundle mainBundle]pathsForResourcesOfType:@"mp3" inDirectory:nil] objectEnumerator]; while ((component = [enumerator nextObject]) != nil) { NSArray *temp = [component componentsSeparatedByString:@".app/"]; NSString *file = [NSString stringWithFormat:@"%@", [temp objectAtIndex:1]]; NSString *writableAudioPath = [documentsDirectory stringByAppendingPathComponent:file]; BOOL success = [fileManager fileExistsAtPath:writableAudioPath]; if (success &amp;&amp; !force) { continue; } else if (success &amp;&amp; force) { success = [fileManager removeItemAtPath:writableAudioPath error:&amp;error]; } success = [fileManager copyItemAtPath:component toPath:writableAudioPath error:&amp;error]; if (!success) { @throw [NSException exceptionWithName:[error localizedDescription] reason:[error localizedFailureReason] userInfo:nil]; } } [fileManager release]; } @catch (NSException *exception) { NSLog(@"%@", exception); @throw [NSException exceptionWithName:exception.name reason:exception.reason userInfo:nil]; } @finally { } }

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• AVAudioPlayer only initializes with some files

  - by Brendan

  Hi everyone, I'm having trouble playing some files with AVAudioPlayer. When I try to play a certain m4a, it works fine. It also works with an mp3 that I try. However it fails on one particular mp3 every time (15 Step, by Radiohead), regardless of the order in which I try to play them. The audio just does not play, though the view loading and everything that happens concurrently happens correctly. The code is below. I get the "Player loaded." log output on the other two songs, but not on 15 Step. I know the file path is correct (I have it log outputted earlier in the app, and it is correct). Any ideas? NSData *musicData = [NSData dataWithContentsOfURL:[[NSURL alloc] initFileURLWithPath:[[NSBundle mainBundle] pathForResource:[song filename] ofType:nil]]]; NSLog([[NSBundle mainBundle] pathForResource:[song filename] ofType:nil]); if(musicData) { NSLog(@"File found."); } self.songView.player = [[AVAudioPlayer alloc] initWithData:musicData error:nil]; if(self.songView.player) { NSLog(@"Player loaded."); } [self.songView.player play]; NSLog(@"You should be hearing something now."); Thanks, Brendan

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• Flash movies in inactive browser tabs pause or don't execute in real time

  - by ZenBlender

  I'm noticing some unexpected behavior. Some time in the last few months, a change in either Firefox, the Flash player, or both, has made it so that Flash movies that are in inactive browser tabs no longer execute in real time. They appear to still execute, but only in bursts, and not in a predictable way. This is a problem because I develop a Flash-based (Actionscript 2.0, Flash CS3) multiplayer game that maintains a network connection and allows players to chat, etc. Many of our players complain about Firefox crashing while playing the game. I have noticed it too, not too frequently, but it crashes several times a week. (Firefox crashes, I do not get a message from Flash player that indicates an infinite loop or problem in my code) My theory is that this new behavior is causing crashes when there is a lot of activity in my game, leading to lots of unhandled network traffic for my game getting buffered before Firefox/Flash will give it a chance to execute. Maybe this leads to a buffer overflow or missing packets, and as a result, something crashes. At times I will switch back to the tab that is running my game and discover a display bug, which looks as though Flash has simply failed to execute something that it was supposed to. I would assume this new behavior is on purpose, for example to prevent all the Flash-based advertisements in inactive tabs from executing and therefore killing performance. In a quick test on Chrome (5.0.342.9 beta), this "pausing" of Flash seems to be there as well, but somehow it seems much less of a problem. My users have only complained about Firefox crashing, not other browsers. My machine: Windows 7 x64 Firefox 3.6.3 Flash Player 10.1.50.426 My game: triplejack.com Any ideas? Ideally I'd like to disable this behavior for my Flash game so it can execute in real time even when in an inactive tab. Thanks for any help!

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• searching article for names in the database before submitting article to the database

  - by zurna

  I want to create a function that will search through a text, find names those match with existing names in the database and add links to those names before submitting the article to the database. i.e. text: Chelsea are making a change now as goalscorer Nicolas Anelka is replaced by in-form Florent Malouda who can do no wrong lately. Nicolas Anelka exists in the database in the Players table with ID column equals to 1. I want text to be converted to Chelsea are making a change now as goalscorer Nicolas Anelka is replaced by in-form Florent Malouda who can do no wrong lately. I know my code is logically wrong but I could build the correct logic. Function PlayerStats (ArticleDesc) If IsNull(ArticleDesc) Then Exit Function SQL = "SELECT PlayerID, PlayerName" SQL = SQL & " FROM Players" SQL = SQL & " WHERE PlayerID = "& &"" Set objTeam = objConn.Execute(SQL) ArticleDesc = Replace(ArticleDesc, "&", "&amp;") PlayerStats = ArticleDesc End Function

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• searching article for names in the database before submitting article to the database

  - by zurna

  I want to create a function that will search through a text, find names those match with existing names in the database and add links to those names before submitting the article to the database. i.e. text: Chelsea are making a change now as goalscorer Nicolas Anelka is replaced by in-form Florent Malouda who can do no wrong lately. Nicolas Anelka exists in the database in the Players table with ID column equals to 1. I want text to be converted to Chelsea are making a change now as goalscorer a href="player.asp=ID=1"Nicolas Anelka/a is replaced by in-form Florent Malouda who can do no wrong lately. I know my code is logically wrong but I could build the correct logic. Function PlayerStats (ArticleDesc) If IsNull(ArticleDesc) Then Exit Function SQL = "SELECT PlayerID, PlayerName" SQL = SQL & " FROM Players" ' SQL = SQL & " WHERE PlayerID = "& &"" Set objPlayer = objConn.Execute(SQL) Do While NOT objPlayer.EOF ArticleDesc = Replace(ArticleDesc, objPlayer("PlayerName"), "!"&objPlayer("PlayerName")&"!") PlayerStats = ArticleDesc Loop objPlayer.MoveNext End Function

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• Java Playing Cards Game Framework

  - by isme

  My friends and I at uni love playing Shithead into the wee hours. But soon we graduate and will leave town, so probably won't get together for a game for a while. I want to develop a Java app we can use to play Shithead and our other favorites over a network. An app like this already exists, but is ugly, buggy and does not support our house rules. The source is available, but is such a mess that I would really rather start from scratch than try to refactor it! Building my game using some standard playing card api or framework, if such a thing exists, would be better than starting from scratch. The answer to a similar SO question was to use the JPC-API, which allegedly provides basic playing card services and rendering. But this Sourceforge project currently makes available no files or source code! Is there an alternative, or somewhere else to find this framework? Soon I will need help with the following as well: Lobby services (finding other players) Gaming network protocol (to communicate moves between players) Gaming theory (to write the computer opponent) Winning condition detection Game UI development

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• Webrick transparent proxy

  - by zzeroo

  Hi there, I've a absolute simple proxy running. require 'webrick' require 'webrick/httpproxy' s = WEBrick::HTTPProxyServer.new(:Port => 8080, :RequestCallback => Proc.new{|req,res| puts req.request_line, req.raw_header}) # Shutdown functionality trap("INT"){s.shutdown} # run the beast s.start This should in my mind not influence the communication in any way. But some sites doesn't work any more. Specially http://lastfm.de 's embedded flash players doesn't work. The header looks link: - -> http://ext.last.fm/2.0/?api%5Fsig=aa3e9ac9edf46ceb9a673cb76e61fef4&flashresponse=true&y=1269686332&streaming=true&playlistURL=lastfm%3A%2F%2Fplaylist%2Ftrack%2F42620245&fod=true&sk=ee93ae4f438767bf0183d26478610732&lang=de&api%5Fkey=da6ae1e99462ee22e81ac91ed39b43a4&method=playlist%2Efetch GET http://play.last.fm/preview/118270350.mp3 HTTP/1.1 Host: play.last.fm User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.2) Gecko/20100308 Ubuntu/10.04 (lucid) Firefox/3.6 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: de,en-us;q=0.7,en;q=0.3 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Proxy-Connection: keep-alive Cookie: AnonWSSession=ee93ae4f438767bf0183d26478610732; AnonSession=cb8096e3b0d8ec9f4ffd6497a6d052d9-12bb36d49132e492bb309324d8a4100fc422b3be9c3add15ee90eae3190db5fc localhost - - [27/Mar/2010:11:38:52 CET] "GET http://www.lastfm.de/log/flashclient/minor/Track_Loading_Fail/Buffering_Timeout HTTP/1.1" 404 7593 - -> http://www.lastfm.de/log/flashclient/minor/Track_Loading_Fail/Buffering_Timeout localhost - - [27/Mar/2010:11:38:52 CET] "GET http://play.last.fm/preview/118270350.mp3 HTTP/1.1" 302 0 I nead some hints why or what the communication disturb.

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• VLC desktop streaming

  - by StackedCrooked

  Edit I stopped using VLC and switched to GMax FLV Encoder. It does a much better job IMO. Original post I am sending my desktop (screen) as an H264 video stream to another machine that saves it to a file using the follwoing command lines: Sender of the stream: vlc -I dummy --sout='#transcode{vcodec=h264,vb=512,scale=0.5} :rtp{mux=ts,dst=192.168.0.1,port=4444}' Receiver of the stream: vlc -I rc rtp://@:4444 --sout='#std{access=file,mux=ps,dst=/home/user/output.mp4}' --ipv4 This works, but there are a few issues: The file is not playable with most players. VLC is able to playback the file but with some weirdness: = it takes about 10 seconds before the playback actually begins. = seeking doesn't work. Can someone point me in the right direction on how to fix these issues? EDIT: I made a little progress. The initial delay in playback is because the player is waiting for a keyframe. By forcing the sender of the stream to create a new key-frame every 4 seconds I could decrease the delay: :screen-fps=10 --sout='#transcode{vcodec=h264,venc=x264{keyint=40},vb=512,scale=0.5} :rtp{mux=ts,dst=192.168.0.1,port=4444}' The seeking problem is not solved however, but I understand it a little better. The RTP stream is saved as a file in its original streaming format, which is normally not playable as a regular video file. VLC manages to play this file, but most other players don't. So I need to convert it to a regular video file. I am currently investigating whether I can do this with ffmpeg if I provide it with an SDP file for the recorded stream. All help is welcome!

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• AVAudioPlayer working in Simulator, but not on device

  - by cannyboy

  My mp3 playing code is: NSError *error; soundObject = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:audioPathString] error:&error]; if (soundObject == nil) NSLog(@"%@", [error description]); soundObject.delegate = self; soundObject.numberOfLoops = 0; soundObject.volume = 1.0; NSLog(@"about to play"); [soundObject prepareToPlay]; [soundObject play]; NSLog(@"[soundObject play];"); The mp3 used to play fine, and it still does on the simulator. But not on the device. I've recently added some sound recording code (not mine) to the software. It uses AudioQueue stuff which is slightly beyond me. Does that conflict with AVAudioPlayer? Or what could be the problem? I've noticed that as soon as the audiorecording code starts working, I can't adjust the volume on the device anymore, so maybe it blocks the audio playback?. EDIT The solution seems to be to put this in my code. I put it in applicationDidFinishLaunching: [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error: nil]; UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker; AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride); The first line allows both play and record, whilst the other lines apparently reroute things to make the volume louder. All audio code is voodoo to me.

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• convert string to date and write back into NSMutableArray

  - by padatronic

  I have a NSMutableArray I get by loading a plist into it. The date field comes in as a string and i want to change it into a nsdate. I can change an nsstring into an nsdate. My array is an array of objects like the one below; { Date = "1/1/2009" Description = "Have you ever looked at a badger and thought i wonder how far you could fire that out of a cannon? Well this talk is for you"; File = "http://www.badgerCannon.org.uk/mp3/070310pm.mp3"; Series = "The Badger planet"; Speaker = "Will Ferell"; Title = "Is it a bird, is it a plane? no its a badger"; } I loop through and pull out the date and convert it from a NSString to a NSDate. I try writing it back in using the code; [[self.MediaDataArray objectAtIndex:i] replaceObjectAtIndex:0 withObject:Date]; but it errors and i am pretty sure it is because i am not putting it back into the array in the same format, ie just as a date not as date = "date". But lets face it i don't really know! Am i barking up the wrong tree? Please help, i have got the coding equivalent of writters block, or alternatively am just being really stupid! thanks in advance

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• displaying music current time & duration from AVFoundation

  - by msb

  I have a view-based iphone application that has a single play-pause button that plays an mp3 file. At the time of invoking my doPlayPauseButton() method, I 'd like to show the current time and total duration of this mp3 through the AVAudioPlayer instance I've created, called myAudioPlayer. I have placed two labels at the UI and i'm trying to assign the currentTime and duration properties to these label when the playing begins but my attempts have failed. Here's my play/pause loop, any help would be appreciated: -(IBAction) doPlayPauseButton:(UIButton *)theButton { if(myAudioPlayer.playing) { [myActivityIndicatorView stopAnimating]; myActivityIndicatorView.hidden = YES; //I think I need a myAudioPlayer.currentTime call of some sort for my labels. [myAudioPlayer pause]; [theButton setTitle:@"Play" forState:UIControlStateNormal]; [myTimer invalidate]; } else { [myActivityIndicatorView startAnimating]; myActivityIndicatorView.hidden = NO; myTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(doTimer) userInfo:nil repeats:YES]; [myAudioPlayer play]; [theButton setTitle:@"Pause" forState:UIControlStateNormal];

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• auto m3u creation

  - by newbie69

  Hi, I am looking for a solution to automatically create .m3u playlists for each music folder in my sdcard so that the music player can play music by folders. I had written a simple VB.Net app in the past that does exactly the above but apparently, it has to be run from Windows. Since I have no Java nor Android developing experience I found it quite hard to try to write a similar app that can be run directly from the phone. In a few words, the app does the following: 1) Searches the SD and lists all folders that contain 2 or more .mp3 files (just for user verification) 2) Creates in every listed folder above, a .m3u file that simply lists line-by-line all the mp3 files that exist in the specific folder. Is there such an app or could someone spare some time and give me some rough instructions on how to create it in Eclipse 3.5.2 environment? (device used: Motorola Droid/Milestone, Android 2.1) I don't care about any graphics or complex UI, just a script to execute the above procedure that would give every "playlist-supporting" music player in Android, the precious ability to play music by folders. I know it is too much to ask but just in case! Thanx in advance.

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• how to 'scale' these three tables?

  - by iddqd

  I have the following Tables: Players id playerName Weapons id type otherData Weapons2Player id playersID_reference weaponsID_reference That was nice and simple. Now I need to SELECT items from the Weapons table, according to some of their characteristics that i previously just packed into the otherData column (since it was only needed on the client side). The problem is, that the types have varying characteristics - but also a lot of similar data. So I'm trying to decide on the following possibilities, all of which have their pros and cons. Solution A Kill the Weapons table, and create a new table for each Weapon-Type: Weapons_Swords id bladeType damage otherData Weapons_Guns id accuracy damage ammoType otherData But how will i Link these to the Players ? create Weapons_Swords2Players, Weapons_Guns2Players for each weapon-type? (Will result in a lot more JOINS when loading the player with all his weapons...and it's also more complicated to insert a new player) or add another column to Weapons2Players called WeaponsTypeTable, then do sub-selects to the correct Weapons sub-table (seems easier, but not really right, slightly easier insert i guess) Solution B Keep the Weapons table, and add all the fields i need to it. The Problem is that then there will be NULL fields, since not all Weapon-Types use all fields (can't be right) Weapons id type accuracy damage ammoType bladeType otherData This seems to be pretty basic stuff, but i just can't decide what's best. Or is there a correct Solution C? many thanks.

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• Web form is not updating tables, why?

  - by JPJedi

  I have a web application and on page is an update page to update some profile information. Below is the code I am using to update the table. But I think it is wrong. Does anything stick out? The connection string works cause it is used to read the database to get the profile information, I just removed it due to it containing password/login info for the db. player is the class of properties that contains player information and ds is the dataset, but I would like to update the database itself online... Dim connectionString As String = "" Dim GigsterDBConnection As New System.Data.SqlClient.SqlConnection(connectionString) GigsterDBConnection.Open() Dim updatetoursql As String = "UPDATE PLAYERS SET FIRSTNAME = '" & player.FIRSTNAME & "', LASTNAME = '" & player.LASTNAME & "', ADDRESS = '" & player.ADDRESS & "', CITY = '" & player.CITY & "', ZIP = '" & player.ZIP & "', PHONE = '" & player.PHONE & "', EMAIL = '" & player.EMAIL & "', REFFEREDBY = '" & player.REFEREDBY & "' " updatetoursql = updatetoursql & "PLAYERID = '" & player.PLAYERID & "';" Dim cmd As New System.Data.SqlClient.SqlCommand(updatetoursql, GigsterDBConnection) Dim sqlAdapter As New System.Data.SqlClient.SqlDataAdapter(cmd) sqlAdapter.Update(ds, "PLAYERS") I think the issue is something the 3 last lines of the code. am I doing it right or is their a better way? Thanks

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• Streaming local file from PHP while it's been written to by a CURL process

  - by Fahim

  I am creating a simple Proxy server for my website. Why I am not using mod_proxy and mod_cache is a different discussion. Here's the code: shell_exec("nohup curl --create-dirs -o {$write_path} {$source_url} > /dev/null 2> /dev/null & echo $!"); sleep(1); $read_speed = 65.5; # 65.5 kb/s download rate $handle = fopen($write_path, "rb"); $content_type = select_meta_item($headers, 'Content-Type'); $file_size = select_meta_item($headers, 'Content-Length'); send_headers($content_type, $file_size); flush(); while (!feof($handle)) { echo fread($handle, round($read_speed * 1024)); flush(); sleep(1); } fclose($handle); Streaming an MP3 doesn't work using this method. Plays in Chrome, but not in Firefox. Initially I'll be using this to stream MP3 files through Long Tail's JW Player. If it all works out, I'll also be using this to send ZIP files.

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• Calculating File size before download

  - by sagar

  Ok ! Coming to the point directly. What I want to do is explained as follows. I have an url of MP3 file. ( for example Sound File ) Now, When user starts application. Download should start & for that I have implemented following methods. -(void)viewDidLoad { [super viewDidLoad]; NSURL *url=[NSURL URLWithString:@"http://xyz.pqr.com/abc.mp3"]; NSURLRequest *req=[NSURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageNotAllowed timeoutInterval:120]; NSURLConnection *con=[[NSURLConnection alloc] initWithRequest:req delegate:self startImmediately:YES]; if(con){ myWebData=[[NSMutableData data] retain]; } else { // [MainHandler performSelector:@selector(targetSelector:) withObject:nil]; } } -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ NSLog(@"%@",@"connection established"); [myWebData setLength: 0]; } -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog(@"%@",@"connection receiving data"); [myWebData appendData:data]; } -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"%@",@"connection failed"); [connection release]; // [AlertViewHandler showAlertWithErrorMessage:@"Sorry, there is no network connection. Please check your network and try again."]; // [self parserDidEndDocument:nil]; } -(void)connectionDidFinishLoading:(NSURLConnection *)connection { [connection release]; } Now, Above methods work perfectly for downloading. But missing points are as follows. I can not get the exact size which is going to be downloaded. ( means I want to know what is the size of file - which is going to be download )

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• "É" not getting converted to two bytes correctly.

  - by ChrisF

  Further to this question I've got a supplementary problem. I've found a track with an "É" in the title. My code: var playList = new StreamWriter(playlist, false, Encoding.UTF8); - private static void WriteUTF8(StreamWriter playList, string output) { byte[] byteArray = Encoding.UTF8.GetBytes(output); foreach (byte b in byteArray) { playList.Write(Convert.ToChar(b)); } } converts this to the following bytes: 195 137 which is being output as à followed by a square (which is an character that can't be printed in the current font). I've exported the same file to a playlist in Media Monkey at it writes the "É" as "É" - which I'm assuming is correct (as KennyTM pointed out). My question is, how do I get the "‰" symbol output? Do I need to select a different font and if so which one? UPDATE People seem to be missing the point. I can get the "É" written to the file using playList.WriteLine("É"); that's not the problem. The problem is that Media Monkey requires the file to be in the following format: #EXTINFUTF8:140,Yann Tiersen - Comptine D'Un Autre Été: L'Après Midi #EXTINF:140,Yann Tiersen - Comptine D'Un Autre Été: L'Après Midi #UTF8:04-Comptine D'Un Autre Été- L'Après Midi.mp3 04-Comptine D'Un Autre Été- L'Après Midi.mp3 Where all the "high-ascii" (for want of a better term) are written out as a pair of characters.

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• Having difficulties in ending Michael Hartl's tutorial. Help?

  - by konzepz

  Following Michael Hartl's (amazing) Ruby on Rails Tutorial, on the final section, I get the following errors: 1) User micropost associations status feed should include the microposts of followed users Failure/Error: @user.feed.should include(mp3) expected [#<Micropost id: 2, content: "Foo bar", user_id: 1, created_at: "2011-01-12 21:22:41", updated_at: "2011-01-12 22:22:41">, #<Micropost id: 1, content: "Foo bar", user_id: 1, created_at: "2011-01-11 22:22:41", updated_at: "2011-01-12 22:22:41">] to include #<Micropost id: 3, content: "Foo bar", user_id: 2, created_at: "2011-01-12 22:22:41", updated_at: "2011-01-12 22:22:41"> Diff: @@ -1,2 +1,2 @@ -#<Micropost id: 3, content: "Foo bar", user_id: 2, created_at: "2011-01-12 22:22:41", updated_at: "2011-01-12 22:22:41"> +[#<Micropost id: 2, content: "Foo bar", user_id: 1, created_at: "2011-01-12 21:22:41", updated_at: "2011-01-12 22:22:41">, #<Micropost id: 1, content: "Foo bar", user_id: 1, created_at: "2011-01-11 22:22:41", updated_at: "2011-01-12 22:22:41">] # ./spec/models/user_spec.rb:214 2) Micropost from_users_followed_by should include the followed user's microposts Failure/Error: Micropost.from_users_followed_by(@user).should include(@other_post) expected [#<Micropost id: 1, content: "foo", user_id: 1, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46">] to include #<Micropost id: 2, content: "bar", user_id: 2, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46"> Diff: @@ -1,2 +1,2 @@ -#<Micropost id: 2, content: "bar", user_id: 2, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46"> +[#<Micropost id: 1, content: "foo", user_id: 1, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46">] # ./spec/models/micropost_spec.rb:75 Finished in 9.18 seconds 153 examples, 2 failures Seems like mp3 is not included in the feed. Any ideas on how to fix it? Or where to look for possible errors in the code? I compared the files with Hartl's original code; seems exact. Thanks.

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• Data Modeling of Entity with Attributes

  - by StackOverflowNewbie

  I'm storing some very basic information "data sources" coming into my application. These data sources can be in the form of a document (e.g. PDF, etc.), audio (e.g. MP3, etc.) or video (e.g. AVI, etc.). Say, for example, I am only interested in the filename of the data source. Thus, I have the following table: DataSource Id (PK) Filename For each data source, I also need to store some of its attributes. Example for a PDF would be "numbe of pages." Example for audio would be "bit rate." Example for video would be "duration." Each DataSource will have different requirements for the attributes that need to be stored. So, I have modeled "data source attribute" this way: DataSourceAttribute Id (PK) DataSourceId (FK) Name Value Thus, I would have records like these: DataSource->Id = 1 DataSource->Filename = 'mydoc.pdf' DataSource->Id = 2 DataSource->Filename = 'mysong.mp3' DataSource->Id = 3 DataSource->Filename = 'myvideo.avi' DataSourceAttribute->Id = 1 DataSourceAttribute->DataSourceId = 1 DataSourceAttribute->Name = 'TotalPages' DataSourceAttribute->Value = '10' DataSourceAttribute->Id = 2 DataSourceAttribute->DataSourceId = 2 DataSourceAttribute->Name = 'BitRate' DataSourceAttribute->Value '16' DataSourceAttribute->Id = 3 DataSourceAttribute->DataSourceId = 3 DataSourceAttribute->Name = 'Duration' DataSourceAttribute->Value = '1:32' My problem is that this doesn't seem to scale. For example, say I need to query for all the PDF documents along with thier total number of pages: Filename, TotalPages 'mydoc.pdf', '10' 'myotherdoc.pdf', '23' ... The JOINs needed to produce the above result is just too costly. How should I address this problem?

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• Giving another object a NSManagedObject

  - by Wayfarer

  Alright, so I'm running into an issue with my code. What I have done is subclassed UIButton so I can give it some more infomormation that pertain to my code. I have been able to create the buttons and they work great. Capiche. However, one of the things I want my subclass to hold is a reference to a NSMangedObject. I have this code in my header file: @interface ButtonSubclass : UIButton { NSManagedObjectContext *context; NSManagedObject *player; } @property (nonatomic, retain) NSManagedObject *player; @property (nonatomic, retain) NSManagedObjectContext *context; - (id)initWithFrame:(CGRect)frame andTitle:(NSString*)title; //- (void)setPlayer:(NSManagedObject *)aPlayer; @end As you can see, it has a instance variable to the NSMangedobject I want it to hold (as well as the Context). But for the life of me, I can't get it to hold that NSManagedObject. I run both the @synthesize methods in the Implementation file. @synthesize context; @synthesize player; So I'm not sure what I'm doing wrong. This is how I create my button: ButtonSubclass *playerButton = [[ButtonSubclass alloc] initWithFrame:frame andTitle:@"20"]; //works playerButton.context = self.context; //works playerButton.player = [players objectAtIndex:i]; //FAILS And I have initilaized the players array earlier, where I get the objects. Another weird thing is that when it gets to this spot in the code, the app crashes (woot) and the the console output stops. It doesn't give me any error, and notification at all that the app has crashed. It just... stops. So I don't even know what the error is that is crashing the code, besides it has to do with that line up there setting the "player" variable. Thoughts and ideas? I'd love your wisdom!

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• checkbox, php and update mysql!

  - by Ronnie Chester Lynwood

  Hello now I got this form. i get values with "while": mysql_query("select * from mp3 where aktif = '0'"); <form name="form" method="post" action=""> <input type="text" size="10" name="id" value="<?=$haciosman['id']?>" /> <input type="text" name="baslik" value="<?=$haciosman['baslik']?> <textarea name="sarkisozu"><?=$haciosman['sarkisozu']?></textarea> <input type="text" name="a3" value="<?=$haciosman['ekleyen']?"> <input type="checkbox" name="onay[]" /> <input type="submit" name="0" id="0" value="Onayla" /> <form> and updating values with: <? if (isset($_POST['onay'])) { $cikti = mysql_query("update mp3 set aktif = '1', baslik = '$_POST[baslik]' where id = '$_POST[id]'"); if ($cikti) { echo "islem tamam"; exit; } } ?> but this code only updating only one value. how can i let it update multiple values?

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• Idea for a small project, should I use Python?

  - by Robb

  I have a project idea, but unsure if using Python would be a good idea. Firstly, I'm a C++ and C# developer with some SQL experience. My day job is C++. I have a project idea i'd like to create and was considering developing it in a language I don't know. Python seems to be popular and has piqued my interests. I definitely use OOP in programming and I understand Python would work fine with that style. I could be way off on this, I've only read small bits and pieces about the language. The project won't be public or anything, just purely something of my own creation do dabble in at home. So the project would essentially represent a simple game idea I have. The game would consist roughly these things: Data structures to hold specific information (would be strongly typed). A way to output the gamestate for the players. This is completely up in the air, it can be graphical or text based, I don't really care at this point. A way to save off game data for the players in something like a database or file system. A relatively easy way for me to input information and a 'GO' button which processes the changes and obviously creates a new gamestate. The game would function similar to a board game. Really nothing out of the ordinary when I look back at that list. Would this be a fun way to learn Python or should I select another language?

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