Multitech MultiConnect Adapter Podręcznik Użytkownika Pobierz pdf (Strona 100)

Chapter 9 – HTTP Server

Command Line Interface and Application Examples for Multi-Tech Systems, Inc. IP Modules (S000368F) 100

2. The Embedded HTML Page

The embedded Web page stored on the IP module consists of normal ASCII text HTML code, which

can be generated using any HTML editing tool. The page can include scripts, links to remote Web sites,

graphic images, text files, etc.

A maximum 30 KB (uncompressed) of flash space for the OEM’s Home Page and an additional 10 KB

maximum memory is reserved for the device parameter list.

The OEM Web page must contain the Parameter Tags, which are the placeholders in HTML files.

These tags are replaced on the fly with real-time values when the page is sent to the browser. The

value of the parameter tags also can be changed through the browser in order to configure the host

through the IP module.

The developer should ensure that the parameter values, which are to be replaced, are qualified with

%P<n>%.

Example:

<HTML>

Efficiency <input type="text" name = "P1" value = "%P1%">

</HTML>

In the above sample code segment, when the browser requests a page, the %P1% is replaced with

Parameter P1's value. This value is extracted from the serial device parameter file.

3. CGI Scripts

Post-Query is a built-in CGI script that will parse the new values set by the browser and replace them

in the http-host-param file. See the section entitled Parameters Manipulation from the Browser for

more technical information about the Post-Query CGI script.

The IP module supports a user-defined CGI script, which performs host-specific processing to the

parameters configured by the remote Web browser.

Important: The user-defined CGI-script MUST be a shell script.

File Naming and File Size Conventions

The following file naming conventions and file size constraints must be followed by the OEM Web

page developer.

File Name(s) Description

http-s0.HTML Serial Device Main Page

http-host-param Default Serial Device Parameter List

http-*.HTML Any HTML file, should have the filename prefixed with "http-"

cgi-* Any cgi script should have the filename prefixed with "cgi-"

Constraints

The HTML file size cannot exceed 30KB Max.

The Parameter list file cannot exceed 10KB Max.

The Parameter tags <P1, P2, …> should be contained in the parameter list.

The URL for Host Configuration is http-s0.HTML. Therefore, the main page must have the

filename http-s0.HTML when the host device's HTML page is uploaded to the IP module.

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