用ASP达成对MP3曲目信息的操作

简单说一下MP3的ID3 标记，因为主要是操作这个玩意

MP3最开始的时候没有我们今天看到的那样，有歌手、年代，专集等等信息

只有一些简单的参数如yes/no来表示是不是privated或者copyrighted等信息，这样对MP3的相关工作带来了很多不便，1996年的时候有个老外提出来在每个MP3后面追加一段数据，用以存放上述的那些信息，后来就发展成为id3 v1 据我所知的现在已经到1.1了，具体的还是自己去查一下吧

还是老习惯，用metadata来引入DLL，我以前有文章贴过的，不知道的请自己去查

看代码

<!--METADATA TYPE="typelib"

UUID="00000205-0000-0010-8000-00AA006D2EA4"

NAME="ADODB Type Library"

-->

<%

Function ConvertBin(Binary)

'This function converts a binary byte into an ASCII byte.

for i = 1 to LenB(Binary)

strChar = chr(AscB(MidB(Binary,i,1)))

ConvertBin = ConvertBin & strChar

Next

End Function

dim objStream

dim strTag, strSongName, strArtist, strAlbum, strYear, _

strComment, strGenre, strFile

'Specify the folder to iterate through, displaying all the MP3s

Const folder = "C:/mp3s/"

'Grab the folder information

Dim objFSO, objFolder, objFile

Set objFSO = Server.CreateObject("Scripting.FileSYstemObject")

Set objFolder = objFSO.GetFolder(folder)

'Create the Stream object

set objStream = Server.CreateObject("ADODB.Stream")

objStream.Type = adTypeBinary

'Loop through the files in the folder

For Each objFile in objFolder.Files

'Open the stream

objStream.Open

objStream.LoadFromFile objFile.Path

'Read the last 128 bytes

objStream.Position = objStream.size - 128

'Read the ID3 v1 tag info

strTag = ConvertBin(objStream.Read(3))

if ucase(strTag) = "TAG" then

strSongName = ConvertBin(objStream.Read(30))

strArtist = ConvertBin(objStream.Read(30))

strAlbum = ConvertBin(objStream.Read(30))

strYear = ConvertBin(objStream.Read(4))

strComment = ConvertBin(objStream.Read(30))

end if

'Display the results

response.write "<table><tr><td colspan=2><h3>" & _

"ID3 Tag info for:</td></tr><tr>" & _

"<td colspan=2>" & objFile.Name & "</td></tr>"

response.write "<tr><td><b>Artist: </b></td>" & _

"<td>" & strArtist & "</td></tr>"

response.write "<tr><td><b>Track: </b></td>" & _

"<td>" & strSongName & "</td></tr>"

response.write "<tr><td><b>Album: </b></td>" & _

<td>" & strAlbum & "</td></tr>"

response.write "<tr><td><b>Year: </b></td>" & _

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