$Web Cookie Parm: Difference between revisions
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{{DISPLAYTITLE:$Web_Cookie_Parm}} | {{DISPLAYTITLE:$Web_Cookie_Parm}} | ||
<span class="pageSubtitle">< | <span class="pageSubtitle">Value of cookie</span> | ||
<var>$Web_Cookie_Parm</var> takes four arguments and returns a string, or null for any error condition. <var>[[$Web_Get_Cookie]]</var> is a synonym for <var>$Web_Cookie_Parm</var>. | |||
==Syntax== | ==Syntax== | ||
<p class="syntax">< | <p class="syntax"><span class="term">%string</span> = <span class="literal">$Web_Cookie_Parm</span>( <span class="term">name</span>, <span class="term">occurrence</span>, [<span class="term">start</span>]], [<span class="term">len</span>] ) | ||
< | </p> | ||
===Syntax terms=== | |||
<table class="syntaxTable"> | <table class="syntaxTable"> | ||
<tr><th>name</th> | <tr><th>name</th> | ||
<td>The name of the cookie, returned by $Web_Cookie_Name. A required argument if occurrence is not specified, otherwise it is optional.</td></tr> | <td>The name of the cookie, returned by <var>[[$Web_Cookie_Name]]</var>. A required argument if occurrence is not specified, otherwise it is optional.</td></tr> | ||
<tr><th>occurrence</th> | <tr><th>occurrence</th> | ||
<td>The occurrence number of a cookie, or the occurrence number of the cookie matching ''name'', if name is specified. An optional argument if ''name'' is specified, otherwise it is required.</td></tr> | <td>The occurrence number of a cookie, or the occurrence number of the cookie matching ''name'', if name is specified. An optional argument if ''name'' is specified, otherwise it is required.</td></tr> | ||
<tr><th>start</th> | <tr><th>start</th> | ||
<td>Starting position within the name. This is an optional argument | <td>Starting position within the name. This is an optional argument that defaults to 1.</td></tr> | ||
<tr><th>len</th> | <tr><th>len</th> | ||
<td>Length to return. This is an optional argument, provided in case a cookie exceeds 255 bytes. The length of a cookie can be determined with $Web_Cookie_Len. The default is the length of the cookie. | <td>Length to return. This is an optional argument, provided in case a cookie exceeds 255 bytes. The length of a cookie can be determined with <var>$Web_Cookie_Len</var>. The default is the length of the cookie. | ||
</td></tr></table> | </td></tr></table> | ||
==Usage notes== | |||
<ul> | |||
<li><var>$Web_Cookie_Parm</var> returns the value of a cookie '''sent by the browser''' and is not affected by <var>$Web_Set_Cookie</var> calls before the <var>$Web_Cookie_Parm</var> call. | |||
For example, if a browser sent a cookie called <code>FOO</code> with a value of <code>PUB</code>, in the following code, <code>%FOO</code> would be set to <code>PUB</code>: | |||
<p class="code">%rc = $Web_Set_Cookie( 'FOO', 'BAR') | |||
%FOO = $Web_Cookie_Parm( 'FOO' ) | |||
</p> | |||
</ul> | |||
==Examples== | |||
This example places the value of each cookie into a User Language %variable of the same name. | This example places the value of each cookie into a <var class="product">User Language</var> %variable of the same name. | ||
<p class="code"> %ARTIST = $Web_Cookie_Parm( 'ARTIST' ) | <p class="code"> %ARTIST = $Web_Cookie_Parm( 'ARTIST' ) | ||
%GENRE = $Web_Cookie_Parm( 'GENRE' ) | %GENRE = $Web_Cookie_Parm( 'GENRE' ) | ||
</p> | </p> | ||
==See also== | |||
See also | |||
<ul> | <ul> | ||
<li>[[Janus Web Server application coding considerations#Understanding cookies|"Understanding cookies"]] | |||
<li><var>[[$Web_Cookie_Len]]</var> | <li><var>[[$Web_Cookie_Len]]</var> | ||
<li><var>[[$Web_Cookie_Name]]</var> | <li><var>[[$Web_Cookie_Name]]</var> | ||
<li><var>[[$Web_Num_Cookie]]</var> | <li><var>[[$Web_Num_Cookie]]</var> | ||
<li><var>[[$Web_Set_Cookie]]</var> | <li><var>[[$Web_Set_Cookie]]</var> | ||
<li><var>[[$Web_Get_Cookie_Lstr]]</var> | <li><var>[[$Web_Get_Cookie_Lstr]]</var> | ||
<li><var>[[$Web_Set_Cookie_Lstr]]</var> | <li><var>[[$Web_Set_Cookie_Lstr]]</var> | ||
Latest revision as of 17:20, 16 April 2013
Value of cookie
$Web_Cookie_Parm takes four arguments and returns a string, or null for any error condition. $Web_Get_Cookie is a synonym for $Web_Cookie_Parm.
Syntax
%string = $Web_Cookie_Parm( name, occurrence, [start]], [len] )
Syntax terms
| name | The name of the cookie, returned by $Web_Cookie_Name. A required argument if occurrence is not specified, otherwise it is optional. |
|---|---|
| occurrence | The occurrence number of a cookie, or the occurrence number of the cookie matching name, if name is specified. An optional argument if name is specified, otherwise it is required. |
| start | Starting position within the name. This is an optional argument that defaults to 1. |
| len | Length to return. This is an optional argument, provided in case a cookie exceeds 255 bytes. The length of a cookie can be determined with $Web_Cookie_Len. The default is the length of the cookie. |
Usage notes
- $Web_Cookie_Parm returns the value of a cookie sent by the browser and is not affected by $Web_Set_Cookie calls before the $Web_Cookie_Parm call.
For example, if a browser sent a cookie called
FOOwith a value ofPUB, in the following code,%FOOwould be set toPUB:%rc = $Web_Set_Cookie( 'FOO', 'BAR') %FOO = $Web_Cookie_Parm( 'FOO' )
Examples
This example places the value of each cookie into a User Language %variable of the same name.
%ARTIST = $Web_Cookie_Parm( 'ARTIST' ) %GENRE = $Web_Cookie_Parm( 'GENRE' )