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Extracting favicon from NETSCAPE-Bookmark-file

 
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Extracting favicon from NETSCAPE-Bookmark-file, Is it possible?
knownasilya
post 21 Mar, 2006 - 11:44 PM
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What I want to do is extract the favicon data from a NETSCAPE-Bookmark-file and convert it back into an image. The data from the file looks like this.

CODE
ICON="data:image/x-icon;base64,AAABAAE
AEBAAAAEAIABoBAAAFgAAACgAAAAQAAAAIAAAAAEAI
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD///8A///
/AI2Njf+NjY3/jY2N/42Njf+NjY3/jY2N/42Njf+NjY3/jY2N
/42Njf+NjY3/jY2N/42Njf+NjY3/////////////////////////////
////////////////////////////////////////////////////jY2N//////
8BbLD/AJz//wCc//8AnP//AJz//wCc//8AnP//AJz//wCc//8
AnP//AJz//wCc//8AnP///////42Njf//////AWyw/wCc//8AnP/
/AJz//wCc//8AnP//AJz//wCc//8AnP//AJz//wCc//8AnP//
AJz///////+NjY3//////wFssP8AnP//AJz//wCc//8AnP//AAAA/w
AAAP8AAAD/AAAA/wAAAP8AnP//AJz//wCc////////jY2N
//////8BbLD/AJz//wCc//8AnP//AAAA/wAAAP8AAAD/AA
AA/wAAAP8AAAD/AJz//wCc//8AnP///////42Njf//////AW
yw/wCc//8AnP//AJz//wAAAP8AAAD/AJz//wCc//8AAAD
/AAAA/wCc//8AnP//AJz///////+NjY3//////wFssP8AnP//
AJz//wCc//8AAAD/AAAA/wCc//8AnP//AAAA/wAAAP8A
nP//AJz//wCc////////jY2N//////8BbLD/AJz//wCc//8AnP//
AAAA/wAAAP8AAAD/AAAA/wAAAP8AAAD/AJz//wCc//8
AnP///////42Njf//////AWyw/wCc//8AnP//AJz//wCc//8AA
AD/AAAA/wAAAP8AAAD/AAAA/wCc//8AnP//AJz///////+
NjY3//////wFssP8AnP//AJz//wCc//8AnP//AJz//wCc//8A
nP//AAAA/wAAAP8AnP//AJz//wCc////////jY2N//////8Bb
LD/AJz//wCc//8AnP//AJz//wCc//8AnP//AJz//wAAAP8A
AAD/AJz//wCc//8AnP///////42Njf//////AWyw/wCc//8An
P//AJz//wCc//8AnP//AJz//wCc//8AAAD/AAAA/wCc//8A
nP//AJz///////+NjY3//////wFssP8AnP//AJz//wCc//8AnP/
/AJz//wCc//8AnP//AJz//wCc//8AnP//AJz//wCc////////j
Y2N//////8BbLD/AWyw/wFssP8BbLD/AWyw/wFssP8Bb
LD/AWyw/wFssP8BbLD/AWyw/wFssP8BbLD//////////w
D////////////////////////////////////////////////////////////
///////////////////////8AwAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAQAAAAEAAA=="


Well I know how to extract, what I want to know is the converting part if possible. And I dont want it done for me, just nudge me in the right direction.

Is there anyway of converting it back to the image? Preferably using PHP. The other option is to actually process every url and retrieve the icon from the individual sites, but this is out of the question..too much bandwidth usage.

This post has been edited by knownasilya: 22 Mar, 2006 - 12:03 AM
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1lacca
post 22 Mar, 2006 - 12:24 PM
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Well, everything is on the first line: data:image/x-icon;base64
What you have to do with php is get the part after the comma ending with the double equality sign (==), feed it to base64decode() and write its output into an .ico file.
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knownasilya
post 22 Mar, 2006 - 06:40 PM
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What would I use to write to an ico or gif file? imagecreate() ?
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1lacca
post 22 Mar, 2006 - 11:57 PM
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No, simply open a file in binary mode for writing: fopen($filename, 'w+b')
And write the whole output of base64_decode into it with fwrite.
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knownasilya
post 23 Mar, 2006 - 06:23 AM
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Ok, thanks. I will do that. What would be the best way to store/save the image. Store the encoded text in db, or decode it and save the image in a directory. This will be done for many icons.. Im not sure which way is most efficient. Or if there are any other ways..

This post has been edited by knownasilya: 23 Mar, 2006 - 06:26 AM
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1lacca
post 23 Mar, 2006 - 07:10 AM
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It depends on what are you going to do with them.
If you mainly use them in base64 encoded format, then it might worth the 8/6 size overhead. Otherwise the binary form is a better idea, however storing them in a db or as files is still a question.
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