CGI: VBScript Banner Footer: Difference between revisions
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Revision as of 23:17, 7 November 2011
VBScript and JavaScript CGI
VBScript Banner and Footer
Generally web pages consist of three parts a banner, page content and footer.
This page covers a very basic page template and a function to simulate PHP’s file include .
Test Script 4
Basic page templateBasic page template is shown on right.
Note: Replace HTML single parameters quotes with double quotes for example style="color:red" becomes style=""color:red""
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'!c:/windows/system32/cscript //nologo Wscript.Echo "Content-type: text/html" & vbLF & vbLF WScript.Echo "<html>" WScript.Echo "<title>Test 4</title>" WScript.Echo "<body>" '--Banner Wscript.Echo "<h2 style=""color:red"" >Banner CGI Test 4</h2>" '--Content WScript.Echo "<p>VBScript CGI Test 4<br />" WScript.Echo "Page Content</p>" '--Footer Wscript.Echo "<h3 style=""color:green"">Footer CGI Test 4</h3>" WScript.Echo "</body>" WScript.Echo "</html>" Wscript.Quit 0 |
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The script produces output as shown on right. Admittedly nothing spectacular a real page banner may include such items as images, text or even news announcements. Similarly the footer can be as complex as you like. Generally the same banner and footer are used on every page providing your site with a consistent look. |
Banner CGI Test 4 VBScript CGI Test 4 Page Content Footer CGI Test 4 |
File Includes
Changing either the banner or footer requires editing each page in your site. This is time consuming and prone to errors. Ideal solution is to save the banner and footer code in external files and includes these with an appropriate include statement.
The following may come, as a surprise unlike PHP there is no way in either VBScript or JavaScript to directly include an external file.
Simulate PHP File IncludesFunction shown on right simulates PHP’s file include by using the VBScript ExecuteGlobal function.
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'==============================================================================
' This sub simulates PHP's include directive
sub includeFile (fSpec)
dim objFSO,objFile,fileData
Set objFSO = CreateObject("Scripting.FileSystemObject")'* Create file obj
Set objFile = objFSO.OpenTextFile(fSpec) '* Open file for read
fileData = objFile.readAll() '* Read file to string
objFile.close '* Close file
executeGlobal fileData '* Run code in string
set objFSO = nothing '* Clean-up remove obj
set objFile = nothing '* Clean-up remove obj
end sub
'==============================================================================
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Test Script 5
In test folder UniServer\www\vbs_test create three new files as shown blow:
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This file contains code that generates your site banner. |
test5_banner.vbs Wscript.Echo "<h2 style=""color:red"">Banner CGI Test 5</h2>" |
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This file contains code that generates your site footer. |
test5_footer.vbs Wscript.Echo "<h3 style=""color:green"">Footer CGI Test 5</h3>" |
Test scriptThe test page includes the above function and original banner and footer text have been replaced with calls to this function. These calls pull in the appropriate files and run the code they contain. Run test script
ResultResult shown below: Banner CGI Test 5 VBScript CGI Test 5 Page Content Footer CGI Test 5 A slight disadvantage with this solution the simulated include file function must be included on every page of your site. That said it is a relatively small amount of code resulting in a positive advantage of having the ability to include files. Note: Included files are not restricted to the file extension .vbs any other suitable extension can be used for example .inc or.txt |
test5_footer.vbs '!c:/windows/system32/cscript //nologo
Wscript.Echo "Content-type: text/html" & vbLF & vbLF
WScript.Echo "<html>"
WScript.Echo "<title>Test 5</title>"
WScript.Echo "<body>"
'--Banner
includeFile("test5_banner.vbs")
'--Content
WScript.Echo "<p>VBScript CGI Test 5<br />"
WScript.Echo "Page Content</p>"
'--Footer
includeFile("test5_footer.vbs")
WScript.Echo "</body>"
WScript.Echo "</html>"
'==============================================================================
' This sub simulates PHP's include directive
sub includeFile (fSpec)
dim objFSO,objFile,fileData
Set objFSO = CreateObject("Scripting.FileSystemObject")'* Create file obj
Set objFile = objFSO.OpenTextFile(fSpec) '* Open file for read
fileData = objFile.readAll() '* Read file to string
objFile.close '* Close file
executeGlobal fileData '* Run code in string
set objFSO = nothing '* Clean-up remove obj
set objFile = nothing '* Clean-up remove obj
end sub
'==============================================================================
Wscript.Quit 0
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Summary
The include file function is not limited to loading a banner or footer file it also allows you to have a separate file containing a set of common functions for your site.
Although the above include file function can be used there is a better alternative, this is covered in the JavaScript section.
Where to next
An import reason for using CGI scripts is to process data sent with a page request. For example this can be data entered in a form this data sent is in a special format referred to as URL encoding. Next page covers URL Encoding.