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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>headers</title><link rel="stylesheet" type="text/css" href="rivet.css"><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><link rel="home" href="index.html" title="Apache Rivet 3.2"><link rel="up" href="commands.html" title="Rivet Tcl Commands and Variables"><link rel="prev" href="exit.html" title="exit"><link rel="next" href="html.html" title="html"></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">headers</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="exit.html"><img src="images/prev.png" alt="Prev"></a> </td><th width="60%" align="center">Rivet Tcl Commands and Variables</th><td width="20%" align="right"> <a accesskey="n" href="html.html"><img src="images/next.png" alt="Next"></a></td></tr></table></div><div class="refentry"><div class="refentry.separator"><hr></div><a name="headers"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>headers — set and parse HTTP headers.</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> (<span style="font-family:monospace; font-weight: bold;">get</span> | <span style="font-family:monospace; font-weight: bold;">set</span> | <span style="font-family:monospace; font-weight: bold;">redirect</span> | <span style="font-family:monospace; font-weight: bold;">add</span> | <span style="font-family:monospace; font-weight: bold;">type</span> | <span style="font-family:monospace; font-weight: bold;">numeric</span>)</div></div></div><div class="refsect1"><a name="idm1179"></a><h2>Description</h2><p style="width:90%">
The <span style="font-family:monospace"><span class="command"><strong>headers</strong></span></span> command is for setting and
parsing HTTP headers.
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">get</span> ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>headername</code></em></span>? ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>value</code></em></span>?</div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">
Read arbitrary header names and values from output HTTP headers
</div></div></dd><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">set</span> ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>headername</code></em></span>? ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>value</code></em></span>?</div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">
Set arbitrary header names and values into output HTTP headers
</div></div></dd><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">sent</span> </div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">
Test internal status of the module and returns 1
if the HTTP headers have been already sent
</div></div></dd><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">redirect</span> ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>uri</code></em></span>?</div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">
Redirect from the current page to a new
URI. <span class="emphasis"><em>Must</em></span> be done in the first block
of TCL code.
</div></div></dd><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">add</span> ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>headername</code></em></span>? ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>value</code></em></span>?</div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">Add text to header
<code class="varname">headername</code>.
</div></div></dd><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">type</span> ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>content-type</code></em></span>?</div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">
This command sets the <code class="constant">Content-type</code>
header returned by the script, which is useful if you wish
to send content other than HTML with Rivet - PNG or jpeg
images, for example.
</div></div></dd><dt><span class="term">
<div class="cmdsynopsis" style="width:80%"><div style="border: 1px solid #282; margin:1ex ; padding:.4ex; padding-left: 0.8ex; word-spacing:1ex "><span style="font-weight:bold ; font-family:monospace">::rivet::headers</span> <span style="font-family:monospace; font-weight: bold;">numeric</span> ?<span style="font-family:monospace; font-weight: bold;"><em class="replaceable"><code>response code</code></em></span>?</div></div>
</span></dt><dd><div style="padding:4 ; margin-top:3 ; margin-bottom:3 ; width:75%"><div style="margin-bottom:1.5ex ; padding .5ex">
Set a numeric response code, such as 200, 404 or 500.
</div></div></dd></dl></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="exit.html"><img src="images/prev.png" alt="Prev"></a> </td><td width="20%" align="center"><a accesskey="u" href="commands.html"><img src="images/up.png" alt="Up"></a></td><td width="40%" align="right"> <a accesskey="n" href="html.html"><img src="images/next.png" alt="Next"></a></td></tr><tr><td width="40%" align="left" valign="top">exit </td><td width="20%" align="center"><a accesskey="h" href="index.html"><img src="images/home.png" alt="Home"></a></td><td width="40%" align="right" valign="top"> html</td></tr></table></div></body></html>
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