用ASP實現對MP3曲目訊息的操作.
先簡單說一下MP3的ID3 標記，因為主要是操作這個玩意。
MP3最開始的時候沒有我們今天看到的那樣，有歌手、年代，專集等等訊息。只有一些簡單的參數如yes/no來表示是不是privated或者copyrighted等訊息，這樣對MP3的相關工作帶來了很多不便，1996年的時候有個老外提出來在每個MP3後面追加一段資料，用以存放上述的那些訊息，後來就發展成為id3 v1 據我所知的現在已經到1.1了，具體的還是自己去查一下吧。
用metadata來引入DLL
<!--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 <b style="color:black;background-color:#a0ffff">tag</b> <b style="color:black;background-color:#99ff99">info
</b> strTag = ConvertBin(objStream.Read(3))
if ucase(strTag) = "<b style="color:black;background-color:#a0ffff">TAG</b>" 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 <b style="color:black;background-color:#a0ffff">Tag</b> <b style="color:black;background-color:#99ff99">info</b> 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>" & _
"<td>" & strYear & "</td></tr>"
response.write "<tr><td><b>Comment: </b>" & _
"</td><td>" & strComment & "</td></tr>"
response.write "</table>"
objStream.Close
Response.Write "<p><hr><p>"
Next
Set objStream = Nothing 'Clean up...
%>
修改了一下：
<!--METADATA TYPE="typelib"
UUID="00000205-0000-0010-8000-00AA006D2EA4"
NAME="ADODB Type Library"
-->
<%
Response.Buffer = false
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 = "F:\MUSIC"
'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
if lcase(objFSO.GetExtensionName(objFile)) = "<b style="color:black;background-color:#ffff66">mp3</b>" then
Response.Write objFile.Type
'Open the stream
objStream.Open
objStream.LoadFromFile objFile.Path
'Read the last 128 bytes
objStream.Position = objStream.Size - 128
'Read the ID3 v1 <b style="color:black;background-color:#a0ffff">tag</b> <b style="color:black;background-color:#99ff99">info
</b>strTag = ConvertBin(objStream.Read(3))
if ucase(strTag) = "<b style="color:black;background-color:#a0ffff">TAG</b>" 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 <b style="color:black;background-color:#a0ffff">Tag</b> <b style="color:black;background-color:#99ff99">info</b> 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>" & _
"<td>" & strYear & "</td></tr>"
response.write "<tr><td><b>Comment: </b>" & _
"</td><td>" & strComment & "</td></tr>"
response.write "</table>"
objStream.Close
Response.Write "<p><hr><p>"
end if
Next
Set objStream = Nothing 'Clean up...
%>