Build transformations.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@583992 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 57 insertions, 2 deletions

diff --git a/docs/manual/mod/mod_proxy_http.html.en b/docs/manual/mod/mod_proxy_http.html.en
index c4239b6678..eb03649146 100644
--- a/docs/manual/mod/mod_proxy_http.html.en
+++ b/docs/manual/mod/mod_proxy_http.html.en
@@ -50,12 +50,67 @@
 <div id="quickview"><h3 class="directives">Directives</h3>
 <p>This module provides no
             directives.</p>
-<h3>See also</h3>
+<h3>Topics</h3>
+<ul id="topics">
+<li><img alt="" src="../images/down.gif" /> <a href="#env">Environment Variables</a></li>
+</ul><h3>See also</h3>
 <ul class="seealso">
 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
 <li><code class="module"><a href="../mod/mod_proxy_connect.html">mod_proxy_connect</a></code></li>
 </ul></div>
-
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="env" id="env">Environment Variables</a></h2>
+    <p>In addition to the configuration directives that control the
+    behaviour of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, there are a number of
+    <dfn>environment variables</dfn> that control the HTTP protocol
+    provider:</p>
+    <dl>
+        <dt>proxy-sendextracrlf</dt>
+        <dd>Causes proxy to send an extra CR-LF newline on the end of a
+        request.  This is a workaround for a bug in some servers.</dd>
+        <dt>force-proxy-request-1.0</dt>
+        <dd>Forces the proxy to send requests to the backend as HTTP/1.0
+        and disables HTTP/1.1 features.</dd>
+        <dt>proxy-nokeepalive</dt>
+        <dd>Forces the proxy to close the backend connection after
+        each request.</dd>
+        <dt>Proxy-Chain-Auth</dt>
+        <dd>If the proxy requires authentication, it will read and
+        consume the proxy authentication credentials sent by the client.
+        With <var>Proxy-Chain-Auth</var> it will <em>also</em> forward
+        the credentials to the next proxy in the chain.  This may
+        be necessary if you have a chain of proxies that share
+        authentication information.  <strong>Security Warning:</strong>
+        Do not set this unless you know you need it, as it forwards
+        sensitive information!</dd>
+        <dt>proxy-sendcl</dt>
+        <dd>HTTP/1.0 required all HTTP requests that include a body
+        (e.g. POST requests) to include a <var>Content-Length</var>
+        header.  This environment variable forces the Apache proxy to
+        send this header to the backend server, regardless of what the
+        Client sent to the proxy.  It ensures compatibility when
+        proxying for an HTTP/1.0 or unknown backend.  However, it
+        may require the entire request to be buffered by the proxy,
+        so it becomes very inefficient for large requests.</dd>
+        <dt>proxy-sendchunks or proxy-sendchunked</dt>
+        <dd>This is the opposite of <var>proxy-sendcl</var>.  It allows
+        request bodies to be sent to the backend using chunked transfer
+        encoding.  This allows the request to be efficiently streamed,
+        but requires that the backend server supports HTTP/1.1.</dd>
+        <dt>proxy-interim-response</dt>
+        <dd>This variable takes values <code>RFC</code> or
+        <code>Suppress</code>.  Earlier httpd versions would suppress
+        HTTP interim (1xx) responses sent from the backend.  This is
+        technically a violation of the HTTP protocol.  In practice,
+        if a backend sends an interim response, it may itself be
+        extending the protocol in a manner we know nothing about,
+        or just broken.  So this is now configurable: set
+        <code>proxy-interim-response RFC</code> to be fully protocol
+        compliant, or <code>proxy-interim-response Suppress</code>
+        to suppress interim responses.</dd>
+    </dl>
+</div>
 </div>
 <div class="bottomlang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_http.html" title="English">&nbsp;en&nbsp;</a></p>