Document proxy-http environment variables in one place.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@582476 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/mod/mod_proxy.xml b/docs/manual/mod/mod_proxy.xml
index 9c187573687fc6ccb1de2d53c4d411ab7efb01ac..b789d308b98d681d4a55599f5a1686362f7dfeeb 100644 (file)
--- a/docs/manual/mod/mod_proxy.xml
+++ b/docs/manual/mod/mod_proxy.xml
@@ -186,6 +186,9 @@
       critical because clients can only contact the hosts that you
       have specifically configured.</p>
 
+      <p><strong>See Also</strong> the <a href="mod_proxy_http.html#env"
+      >Proxy-Chain-Auth</a> environment variable.</p>
+
     </section> <!-- /access -->
 
     <section id="startup"><title>Slow Startup</title>

diff --git a/docs/manual/mod/mod_proxy_http.xml b/docs/manual/mod/mod_proxy_http.xml
index f3fc518f9e3c2df0c13199771c80dd87061364cd..4cd42f2abf7f77f1ceca98fcb1fdf1958ecf0188 100644 (file)
--- a/docs/manual/mod/mod_proxy_http.xml
+++ b/docs/manual/mod/mod_proxy_http.xml
@@ -52,4 +52,45 @@
 <seealso><module>mod_proxy</module></seealso>
 <seealso><module>mod_proxy_connect</module></seealso>
 
+<section id="env"><title>Environment Variables</title>
+    <p>In addition to the configuration directives that control the
+    behaviour of <module>mod_proxy</module>, 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>
+    </dl>
+</section>
+
 </modulesynopsis>