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Solved

lyrics search

Posted on 1999-01-10
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236 Views
Last Modified: 2010-04-06
does anybody know how to search and retrieve cd lyrics from the lyrics server at www.lyrics.ch? I have a couple of http components but dont know how to do what i want.

thanks for your help
cando
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Question by:cando
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6 Comments
 
LVL 20

Expert Comment

by:Madshi
ID: 1355815
Can't help you, but your project seems to be interesting..,

Will the result of your work will be freeware?   :-)

Regards, Madshi.
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LVL 4

Accepted Solution

by:
BoRiS earned 500 total points
ID: 1355816
cando

This is a unit I created to search yahoo for but I have addapted it to do your search, you just need to copy and paste this unit and then included it in your projects uses clause

uses
Windows, Forms, ..., LyFind;

unit LyFind;

interface

uses
  Classes;

type
  TFindWebThread = class(TThread)
  protected
    strAddr, strStatus: string;
    procedure Execute; override;
    procedure AddToList;
    procedure ShowStatus;
  public

    strUrl: string;
  end;

implementation

{ TFindWebThread }

uses
  WinInet, WebMainFrm, SysUtils;

procedure TFindWebThread.AddToList;
begin
  Form1.SearchMemo.Items.Add (strAddr);//this adds the found url to a memo called searchmemo on form1
end;

procedure TFindWebThread.Execute;
var
  hHttpSession, hReqUrl: HInternet;
  Buffer: array [0..1023] of Char;
  nRead: Cardinal;
  strRead: string;
  nBegin, nEnd: Integer;
begin
  strRead := '';
  hHttpSession := InternetOpen ('FindWeb',
    INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
  try
    hReqUrl := InternetOpenURL (hHttpSession, PChar(StrUrl),
      nil, 0,0,0);
    strStatus := 'Connected to ' + StrUrl;
    Synchronize (ShowStatus);
    try
      // read all the data
      repeat
        InternetReadFile (hReqUrl, @Buffer,
          sizeof (Buffer), nRead);
        strRead := strRead + string (Buffer);
        strStatus := 'Retrieved ' + IntToStr (Length (strRead)) +
          ' of ' + StrUrl;
        Synchronize (ShowStatus);
      until nRead = 0;
    finally
      InternetCloseHandle (hReqUrl);
    end;
  finally
    InternetCloseHandle (hHttpSession);
  end;
  // extract the HTTP headers
  strStatus := 'Extracting headers from ' + StrUrl;
  Synchronize (ShowStatus);
  strRead := LowerCase (strRead);
  repeat
    // find the initial part HTTP reference
    nBegin := Pos ('href="http', strRead);
    if nBegin <> 0 then
    begin
      // get the remaining part of the string
      strRead := Copy (strRead, nBegin + 6,
        Length (strRead) - nBegin - 6);
      // find the end of the HTTP reference
      nEnd := Pos ('>', strRead);
      strAddr := Copy (strRead, 0, nEnd - 2);
      // add the URL if 'lyrics' is not in it
      if (strAddr <> '') and (Pos ('lyrics', strAddr) = 0) then
        Synchronize (AddToList);
    end;
  until nBegin = 0;
  strStatus := 'Done with ' + StrUrl;
  Synchronize (ShowStatus);
end;

procedure TFindWebThread.ShowStatus;
begin
  Form1.StatusBar1.SimpleText := strStatus; //this is to keep you updated on the form1 statusbar
end;

end.

then on a button click on the form you useing to search add this

procedure TForm1.SerButClick(Sender: TObject);
var
  FindThread: TFindWebThread;
begin
    FindThread := TFindWebThread.Create (True);
    FindThread.FreeOnTerminate := True;
    FindThread.strUrl :=
    'http://search.lyrics.ch/query/normal?' +
    ArtistEdit.Text + AlbumEdit.Text + SongEdit.Text';
    FindThread.Resume;
end;

remember that the unit I gave you must be in this forms uses clause

uses
Windows, Forms, ..., LyFind;

if you have problems don't reject the answer, let me know and I will mail you a working example...also this was written in delphi 4 and not tested on delphi 3 yet but I will test it for on D3...

Later
BoRiS
0
 
LVL 4

Expert Comment

by:BoRiS
ID: 1355817
cando

I tested it and it works fine but here is the new button click procedure on the mainform

procedure TForm1.Button1Click(Sender: TObject);
var
FindThread: TFindWebThread;
begin
    FindThread := TFindWebThread.Create (True);
    FindThread.FreeOnTerminate := True;
    FindThread.strUrl :=
    'http://search.lyrics.ch/query/normal?' + 'artist=' +
    ArtistEdit.Text + '&album=' + AlbumEdit.Text + '&song=' + SongEdit.Text;
    FindThread.Resume;
end;

also you may need to check the edit for spaces and replace them with + signs

Later
BoRiS
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Author Comment

by:cando
ID: 1355818
I seem to be having trouble with the piece that recieves the data, there are variable problems. If you would send me a working example, that would be great.

cando
cando@ix.netcom.com
0
 

Author Comment

by:cando
ID: 1355819
I seem to be having trouble with the piece that recieves the data, there are variable problems. If you would send me a working example, that would be great.

cando
cando@ix.netcom.com
0
 
LVL 4

Expert Comment

by:BoRiS
ID: 1355820
cando

I have mailed it to you....

Later
BoRiS
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