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TclHttpd The Tcl Web Server

TclHttpd The Tcl Web Server. Brent Welch <welch@scriptics.com> www.scriptics.com/tclhttpd ftp.scriptics.com/pub/tcl/httpd. Goals and Experiences. Embeddable, Extensible Web Server Add web interface to your application License server, DHCP server, Mail List Server

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TclHttpd The Tcl Web Server

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  1. TclHttpdThe Tcl Web Server Brent Welch <welch@scriptics.com> www.scriptics.com/tclhttpd ftp.scriptics.com/pub/tcl/httpd Tcl/2k Conference, slide 1

  2. Goals and Experiences • Embeddable, Extensible Web Server • Add web interface to your application • License server, DHCP server, Mail List Server • General Purpose Web Server • Page Templates • Built-in form handlers • sunscript.sun.com • www.scriptics.com Tcl/2k Conference, slide 2

  3. Architecture for Extensibility File System Other Process Your Application Template App- Direct CGI Doc URL Dispatch HTTP Protocol Tcl/2k Conference, slide 3

  4. URL Dispatch Implement a URL sub-tree, interpret meaning of URL path Application-Direct Maps a URL to a Tcl Procedure. Maps form data to procedure arguments. Document Templates Procedure calls, variable references inside HTML pages General Doc-Type handlers Authentication hook Architecture for Extensibility Tcl/2k Conference, slide 4

  5. Url Dispatch: Partition Hierarchy /status /resource Url_PrefixInstall prefix command inThread Url_PrefixInstall /resource ResourceDispatch 0 Tcl/2k Conference, slide 5

  6. Direct_Url /status Status proc Status/doc { {pattern *} {sort hits} } { # Display URLs matching $pattern # Sort display by name or hit count return $html } /status/doc?pattern=/images*&sort=name Missing parameters get default value, or “” Return value of proc is the page Set alternate content-types, not just text/html Application-DirectMap URL to Tcl Procedure Tcl/2k Conference, slide 6

  7. Use Tcl to general complex HTML for navigation Put simple calls into pages [scriptics::header “Title” lev1 lev2 lev3] Cache template output in plain .html file Form handlers Embed calls to handle incoming form data “Self-posting forms” repopulate fields, then redirect to the next page when everything is OK Document Templates: HTML+Tcl Tcl/2k Conference, slide 7

  8. 32 K File Fetch Tcl/2k Conference, slide 8

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