We keep seeing people confused that %[bB] mean different things in 2.0
to 1.3, and the docs don't really do a lot to help here. Something like
this is more accurate and useful, I think: any comments?
Index: mod/mod_log_config.xml
===================================================================
--- mod/mod_log_config.xml (revision 126293)
+++ mod/mod_log_config.xml (working copy)
@@ -77,10 +77,10 @@
<td>Local IP-address</td></tr>
<tr><td><code>%...B</code></td>
- <td>Bytes sent, excluding HTTP headers.</td></tr>
+ <td>Size of response in bytes, excluding HTTP headers.</td></tr>
<tr><td><code>%...b</code></td>
- <td>Bytes sent, excluding HTTP headers. In CLF format, <em>i.e.</em>
+ <td>Size of response in bytes, excluding HTTP headers. In CLF format,
<em>i.e.</em>
a '<code>-</code>' rather than a 0 when no bytes are sent.</td></tr>
<tr><td><code>%...{<var>Foobar</var>}C</code></td>
@@ -237,6 +237,14 @@
a backslash, and all whitespace characters which are written in their
C-style notation (<code>\n</code>, <code>\t</code> etc).</p>
+ <p>Note that in httpd 2.0, unlike 1.3, the <code>%b</code> and
+ <code>%B</code> format strings do not represent the number of
+ bytes sent to the client, but simply the size in bytes of the HTTP
+ response (which will differ, for instance, if the connection is
+ aborted, or if SSL is used). The <code>%O</code> format provided
+ by <module>mod_logio</module> will log the actual number of bytes
+ sent over the network.</p>
+
<p>Some commonly used log format strings are:</p>
<dl>
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