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mimetype.ini file (as described above) resides in the webuidevkit/streamapp/

directory.

4.3 Dynamic Web Pages

Web pages can include dynamic values. Dynamic Web Pages are built in HTML or

XML or in an other text file format that exclude the binary character 0x00, i.e. the

dynamic page can be an HTML file. It's possible to use scripts or everything else

allowed in the given document's file format.

Initial Dynamic Mark

In order to indicate that Web page is dynamic, it has to contain the special initial

dynamic mark &L(0,"*"); in the first 500 Bytes and before any other dynamic value

is used. The initial mark can also have decimal number as its optional third

parameter. Example of such initial mark is &L(0,“*“,1);.

The third parameter is parsed bitwise and has the following meaning:

• bit 0 is reserved for backwards compatibility and can be set to any value

• bits 1-3 select the password level (as a 3-bit number), which protects this page; 0

for no password protection

• bits 4-6 are reserved for future use and should be set to 0

• bit 7 is reserved for backwards compatibility and can be set to any value

Syntax of Dynamic Marks

Dynamic marks can be used to put dynamic values in Web pages. All dynamic

marks have the following syntax: &L<name>(<id>,<format>[,par]);

A dynamic mark always starts with &L and it is always case sensitive.

• <name> selects a group of dynamic values. Defined is the “Setup” group for all

configuration parameters and the “State” group for actual parameter states.

Remaining parameters are included in parentheses, with the right parenthesis

followed by a semicolon.

• <id> determines the desired function.

• <format> is a C-style format string (refer to the ANSI documentation).

• <par> are optional additional parameters. If additional parameters are needed, it

is mentioned in the function lists below.

Note: The string “);” is not allowed inside a dynamic mark.

To have this construct inside the format string, use “)\;“(in an unknown escape

sequence, only the '\' will be removed).

To have a “%” sign (percent sign) inside the format string, use “%%” (two signs

without space).

The whole mark is replaced by the dynamic value formatted with the <format>

string. Only one value is allowed per dynamic mark. The length of the dynamic mark

mustn't exceed 500 characters. The resulting string from the dynamic mark must

not exceed 500 characters.

A dynamic mark can be contained in an another dynamic mark. Only one recursion

step is allowed and correct “escaping” has to be applied. Example:

&LSetup(3,"%s",419,B,!0,"<meta http-equiv=refresh

content=\"&LSetup(1,\"%u\",419)\;; url=info.html\">");

Note the special “\” before the semicolon of the dynamic mark inside. This is

because the escape sequence is interpreted as only a semicolon and is needed in

order to include the prohibited sequence “);” inside a dynamic mark.

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BARIX Streaming Client Guida di Installazione Pagina 26

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