websexpand.htm
来自「Writing Efficient C for ARM 基于ARM内核微处」· HTM 代码 · 共 54 行
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<td class="titleLeft" align=left width="33%">websExpand</TD><td class="titleCenter" align=center width="33%"><b>
GoAhead WebServer API</b></TD><td class="titleRight" align=right width="33%"><B>
GoAhead EMF</B></TD></TR> </TABLE><HR> <h2>Synopsis</h2><p>Expand dollar variables
in a string.</p><h2>Prototype</h2><pre> #include "webs.h"
char_t *<b>websExpand</b>
(webs_t wp, char_t *buf, char_t *string, int bufsize); </pre><h2>Parameters</h2><table width=100% BORDER="0" CELLPADDING="0" CELLSPACING="0">
<TR> <TD VALIGN="TOP" WIDTH="5%">wp <TD WIDTH="95%"> Web server connection handle
<TR> <TD VALIGN="TOP" WIDTH="5%">buf <TD WIDTH="95%">Output buffer <TR> <TD VALIGN="TOP" WIDTH="5%">string
<TD WIDTH="95%"> Input string<tr> <td cellpadding = 20 VALIGN="TOP" WIDTH="5%">len</td><td cellpadding = 20 WIDTH="95%">
Size of output buffer</td></tr></table><h2>Description</h2><P>The websExpand procedure
can be used to expand all dollar variables. These include all the standard CGI
variables, extended GoAhead WebServer variables and all current per request variables.
In addition to the standard set below, all request header variables are stored
as "HTTP_name" where name is request header keyword mapped to lower
case. If a particular dollar variable is not found, the original text for that
variable is unchanged. </P><P>If the <EM>buffer</EM> is NULL, the expanded string
is returned in a dynamically allocated buffer. Use <STRONG>bfree</STRONG> to free
the buffer when you are finished. </P><P> The standard variable set includes:
</P><table width="100%" border="1" CELLPADDING="0" CELLSPACING="0"> <tr><td>COMPANY</td><td>Defined
company name</td></tr> <tr><td>CONTENT_LENGTH</td><td>Length of posted content</td></tr>
<tr><td>DBNAME</td><td>Primary database name "primary"</td></tr> <tr><td>DESCRIPTION</td><td>Product
description</td></tr> <tr><td>D_OS</td><td>Operating system name</td></tr> <tr><td>D_PROD</td><td>Home
directory for the product</td></tr> <tr><td>D_SOLUTION</td><td>Home directory
for solution packs</td></tr> <tr><td>GATEWAY_INTERFACE</td><td>Version of this
gateway interface</td></tr> <TR> <TD>HTTP_AUTHORIZATION <TD>Password supplied
by the browser <TR> <TD>HTTP_name <TD>Where name is any key name in the browser
request <tr><td>OS</td><td>Operating system</td></tr> <tr><td>PATH_INFO</td><td>URL
path information after /form</td></tr> <tr><td>PATH_TRANSLATED</td><td>File system
path name for URL document</td></tr> <tr><td>PRODUCT</td><td>Product name</td></tr>
<tr><td>QUERY_STRING</td><td>Complete query string</td></tr> <tr><td>REMOTE_ADDR</td><td>Requesting
browsers IP address</td></tr> <tr><td>REMOTE_HOST</td><td>Requesting browsers
host name</td></tr> <tr><td>REQUEST_METHOD</td><td>Request operation type</td></tr>
<tr><td>SERVER_HOST</td><td>Host name for this web server</td></tr> <tr><td>SERVER_PORT</td><td>TCP/IP
port used by this web server</td></tr> <tr><td>SERVER_URL</td><td>URL to address
the home page for this web server</td></tr> <tr><td>VERSION</td><td>Version number
(n.n) for this product</td></tr> <tr><td>VERSION_FULL</td><td>Full version number
(n.n.n)</td></tr> </table><h2>Return Value</h2><p> Returns the <i>buffer</i> supplied
or dynamically allocated buffer if <i>buffer</i> was NULL. Return NULL on errors.</p><h2>Example</h2><pre>
websExpand(wp, NULL, "$COMPANY $SERVER_PORT", -1); </pre><h2>Stability
Classification</h2><p>Stable.</p><h2>See Also</h2><p><A href="../basicapi/bfree.htm">bfree</A></p></td></tr></table>
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