35.91 PREPARE_URL Function

The PREPARE_URL function serves two purposes:

To return an f?p URL with the Session State Protection checksum argument (&cs=) if one is required.
To return an f?p URL with the session ID component replaced with zero (0) if the zero session ID feature is in use and other criteria are met.

Note:

The PREPARE_URL functions returns the f?p URL with &cs=<large hex value> appended. If you use this returned value, for example in JavaScript, it may be necessary to escape the ampersand in the URL to conform with syntax rules of the particular context.

Syntax

APEX_UTIL.PREPARE_URL (
    p_url                    IN VARCHAR2,
    p_url_charset            IN VARCHAR2 default null,
    p_checksum_type          IN VARCHAR2 default null,
    p_triggering_element     IN VARCHAR2 default 'this'
    p_plain_url              IN BOOLEAN  default false 
RETURN VARCHAR2;

Parameters

Table 35-75 PREPARE_URL Parameters

Parameter	Description
`p_url`	An f?p relative URL with all substitutions resolved.
`p_url_charset`	The character set name (for example, `UTF-8`) to use when escaping special characters contained within argument values.
`p_checksum_type`	Null or any of the following six values, `SESSION` or `3`, `PRIVATE_BOOKMARK` or `2`, or `PUBLIC_BOOKMARK` or `1`.
`p_triggering_element`	A jQuery selector (for example, `#my_button` , where `my_button` is the static ID for a button element), to identify which element to use to trigger the dialog. This is required for Modal Dialog support.
`p_plain_url`	Exclude any of the generated JavaScript code to close a modal dialog, if applicable. By default, if this function is called from a modal dialog, JavaScript code to close the modal dialog is included in the generated URL.

Example 1

The following example shows how to use the PREPARE_URL function to return a URL with a valid 'SESSION' level checksum argument. This URL sets the value of P1_ITEM page item to xyz.

DECLARE
    l_url varchar2(2000);
    l_app number := v('APP_ID');
    l_session number := v('APP_SESSION');
BEGIN
    l_url := APEX_UTIL.PREPARE_URL(
        p_url => 'f?p=' || l_app || ':1:'||l_session||'::NO::P1_ITEM:xyz',
        p_checksum_type => 'SESSION');
END;

Example 2

The following example shows how to use the PREPARE_URL function to return a URL with a zero session ID. In a PL/SQL Dynamic Content region that generates f?p URLs (anchors), call PREPARE_URL to ensure that the session ID is set to zero when the zero session ID feature is in use, when the user is a public user (not authenticated), and when the target page is a public page in the current application:

htp.p(APEX_UTIL.PREPARE_URL(p_url => 'f?p=' || :APP_ID || ':10:'|| :APP_SESSION
||'::NO::P10_ITEM:ABC');

When using PREPARE_URL for this purpose, the p_url_charset and p_checksum_type arguments can be omitted. However, it is permissible to use them when both the Session State Protection and Zero Session ID features are applicable.