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- >I've thought for some time that a nice feature in WWW servers would be
- >the ability to look inside a remote tar (or tar.Z) file (or an ar
- >library or whatever), i.e. remotely list the contents or just extract
- >one file. I've been thinking how I could build this into a server like plexus.
- >
- >So that a normal URL which names a tar file will simply retrieve the
- >file (as most users want, I assume) there needs to be some way of
- >referring to the subunit of the file. The obvious way is to use #, e.g.
- >
- >http://www/foo/bar.tar.Z#blech.c
- >
- > - this would indicate to the server that it is to unpack blech.c from
- >/foo/bar.tar.Z and send it back as a normal file. However, I have only
- >seen the # documented as something which browsers can use for internal
- >hyperlinks, not as part of the a URL that can be sent to a http server.
- >Is this a problem?
-
- I don't think this is correct. Any url can make use of the # directive.
- It just tells a browser to go to a specific part of a document instead of
- to the beginning. I don't know of any browsers that actually 'generate'
- these internally.
-
- >The question mark would seem better suited to search the list of contents,
- >e.g. http://www/foo/bar.tar.Z?*.c
- >would return
- >
- >blech.c erk.c glug.c
- >
- >A related question is whether I can have slashes in the test following
- >the # or ?. e.g. for a tar file with relative filenames
- >
- >http://www/foo/bar.tar.Z#./blech.c
- >
- >would be common. Since slashes are meaningful to an http: URL, and the
- >browser can interpret them, would this cause confusion?
-
- The only problem with using ./ in the path would be that the browser
- is likely to interpret it as a relative pathname. For example,
- http://www/foo/bar.tar.Z#./blech.c would more than likely be translated
- into http://www/foo/bar.tar.Z#/foo/blech.c by a browser.
-
- It would be fairly easy to tell the replacing function not to replace
- any . or .. after a # sign though. (I haven't tried this with mosaic or
- lynx yet, but I know that my emacs browser would replace the ./ with nothing
- so the url above would be http://www/foo/bar.tar.Z#blech.c)
-
- -Bill Perry
-
-