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Re: how to implement "tail -f" using CGI

by saucepan (Scribe)
on May 17, 2001 at 03:52 UTC ( #81127=note: print w/replies, xml ) Need Help??

in reply to how to implement "tail -f" using CGI

Try renaming your CGI script to nph-whatever.cgi. Many webservers will, upon noticing the "nph-" (no parsed headers) prefix on a CGI script, send the script output directly to the browser without any buffering.

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Re^2: how to implement "tail -f" using CGI
by tadman (Prior) on May 17, 2001 at 11:01 UTC
    This is the "old fashioned" way to do it. Instead, you are probably better off using the way, which is documented as such:      use CGI qw [ -nph :standard ]; The '-nph' triggers a header equivalent to the aforementioned 'nph-' prefix on the CGI. There are several alternative methods, plus other discussion, in the CGI documentation under 'NPH'.

    Of course, you will have to unbuffer STDOUT for full effect, as with:      $|++; As a further note, make sure the HTML you are sending to the browser can be displayed immediately. Under Netscape, for example, a table will not display until it is fully loaded. If you keep sending table data ad infinitum, the table will never display. This also applies to other tags including, but not limited to, UL and OL.

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