How does Finder keep track of downloaded files' original URLs?











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When you open the info window, i.e. Get Info, of a downloaded file, Finder will show you the downloaded origin, called Where from. This information is there even the file is moved or slightly modified. How does Finder achieve this? Is it a feature of the file system?






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    up vote
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    down vote

    favorite
    1












    When you open the info window, i.e. Get Info, of a downloaded file, Finder will show you the downloaded origin, called Where from. This information is there even the file is moved or slightly modified. How does Finder achieve this? Is it a feature of the file system?






    finder







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      up vote
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      down vote

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      1





      When you open the info window, i.e. Get Info, of a downloaded file, Finder will show you the downloaded origin, called Where from. This information is there even the file is moved or slightly modified. How does Finder achieve this? Is it a feature of the file system?






      finder







      share|improve this question















      When you open the info window, i.e. Get Info, of a downloaded file, Finder will show you the downloaded origin, called Where from. This information is there even the file is moved or slightly modified. How does Finder achieve this? Is it a feature of the file system?






      finder




      finder






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      edited 5 hours ago

























      asked 5 hours ago









      jackxujh

      431112




      431112






















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          In the metadata associated to a file. Use xattr from the command line to see and manipulate the metadata. Using ‘get info’ in the GUI is not equivalent, but should allow you to see some metadata attributes, including the originating URL.






          share|improve this answer





















          • Where is the metadata stored then?
            – jackxujh
            5 hours ago










          • @jackxujh it s a part of the file itself
            – Francis from ResponseBase
            5 hours ago










          • Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
            – jackxujh
            5 hours ago











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          1 Answer
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          active

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          active

          oldest

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          up vote
          3
          down vote













          In the metadata associated to a file. Use xattr from the command line to see and manipulate the metadata. Using ‘get info’ in the GUI is not equivalent, but should allow you to see some metadata attributes, including the originating URL.






          share|improve this answer





















          • Where is the metadata stored then?
            – jackxujh
            5 hours ago










          • @jackxujh it s a part of the file itself
            – Francis from ResponseBase
            5 hours ago










          • Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
            – jackxujh
            5 hours ago















          up vote
          3
          down vote













          In the metadata associated to a file. Use xattr from the command line to see and manipulate the metadata. Using ‘get info’ in the GUI is not equivalent, but should allow you to see some metadata attributes, including the originating URL.






          share|improve this answer





















          • Where is the metadata stored then?
            – jackxujh
            5 hours ago










          • @jackxujh it s a part of the file itself
            – Francis from ResponseBase
            5 hours ago










          • Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
            – jackxujh
            5 hours ago













          up vote
          3
          down vote










          up vote
          3
          down vote









          In the metadata associated to a file. Use xattr from the command line to see and manipulate the metadata. Using ‘get info’ in the GUI is not equivalent, but should allow you to see some metadata attributes, including the originating URL.






          share|improve this answer












          In the metadata associated to a file. Use xattr from the command line to see and manipulate the metadata. Using ‘get info’ in the GUI is not equivalent, but should allow you to see some metadata attributes, including the originating URL.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 5 hours ago









          Francis from ResponseBase

          43126




          43126












          • Where is the metadata stored then?
            – jackxujh
            5 hours ago










          • @jackxujh it s a part of the file itself
            – Francis from ResponseBase
            5 hours ago










          • Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
            – jackxujh
            5 hours ago


















          • Where is the metadata stored then?
            – jackxujh
            5 hours ago










          • @jackxujh it s a part of the file itself
            – Francis from ResponseBase
            5 hours ago










          • Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
            – jackxujh
            5 hours ago
















          Where is the metadata stored then?
          – jackxujh
          5 hours ago




          Where is the metadata stored then?
          – jackxujh
          5 hours ago












          @jackxujh it s a part of the file itself
          – Francis from ResponseBase
          5 hours ago




          @jackxujh it s a part of the file itself
          – Francis from ResponseBase
          5 hours ago












          Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
          – jackxujh
          5 hours ago




          Thanks! I got it! I can run $ xattr -l cat_video.mp4 to show a list of attributes in both hex and text, or without -l to show only name of attributes. And other parameters with other usages as well!
          – jackxujh
          5 hours ago


















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