| <html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Upgrading from mod_dtcl or NeoWebScript</title><link rel="stylesheet" type="text/css" href="rivet.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Apache Rivet"><link rel="up" href="index.html" title="Apache Rivet"><link rel="prev" href="internals.html" title="Rivet Internals"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Upgrading from mod_dtcl or NeoWebScript</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="internals.html"><img src="images/prev.png" alt="Prev"></a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> </td></tr></table></div><div class="section"><div class="titlepage"><div><div><hr><h2 class="title" style="clear: both"><a name="upgrading"></a>Upgrading from mod_dtcl or NeoWebScript</h2></div></div></div><p style="width:90%"> | |
| Rivet is a break from the past, in that we, the authors, have | |
| attempted to take what we like best about our past efforts, and | |
| leave out or change things we no longer care for. Backwards | |
| compatibility was not a primary goal when creating Rivet, but we | |
| do provide this information which may be of use to those wishing | |
| to upgrade from mod_dtcl or NWS installations. | |
| </p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp59193408"></a>mod_dtcl</h3></div></div></div><p style="width:90%"> | |
| Rivet was originally based on the dtcl code, but it has | |
| changed (improved!) quite a bit. The concepts remain the | |
| same, but many of the commands have changed. | |
| </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="idp59194752"></a>NeoWebScript</h3></div></div></div><p style="width:90%"> | |
| NWS was a server-side scripting environment based on the Apache | |
| HTTP server and Safe-Tcl and it's not maintained anymore. | |
| </p><p style="width:90%"> | |
| The biggest difference between Rivet and Neowebscript is that | |
| Neowebscript was designed for shared hosting while Rivet is more oriented | |
| toward a site that owns all of its content. In the words of Karl Lehenbauer, | |
| NWS author and Rivet Team member: | |
| </p><p style="width:90%"> | |
| Rivet, however, is considerably more efficient, powerful, and | |
| evolved, though it still can support multiple independent sites on a single | |
| machine through its <span class="quote">“<span class="quote">separate virtual interpreters</span>”</span> mechanism. | |
| </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">By powerful, the difference is that the full power of Tcl is available | |
| to webpage authors, not the restricted version that NWS provides. | |
| For instance, you can read or write any file in the system that you | |
| have permission to, require any package, open sockets and pipes, etc.</li><li class="listitem">By efficient, the difference is that Tcl interpreters survive past | |
| the generation of a webpage and are reused again and again, reducing the | |
| overhead of generating a page. | |
| </li><li class="listitem">By evolved, all of our efforts have gone toward Rivet for many | |
| years and so, you know, Rivet does more out of the box than Neowebscript did.</li></ul></div><p style="width:90%"> | |
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