Generating an interactive HTML page with JavaScript

The script is a SAS^© Stored Process designed to be executed via a web server. It produces a complete HTML page containing JavaScript code to manage the opening and closing of a pop-up window in response to various user actions (hover, click, double-click). The pop-up window itself attempts to load another Stored Process. Additionally, the script decodes and displays HTTP cookies sent by the client. The whole is encapsulated to function in the SAS^© 9 or Viya^™ Stored Processes environment, using the _webout output destination.

Data Analysis

Type : CREATION_INTERNE

The main content (HTML and JavaScript code) is generated directly in the script via a DATA _NULL_ step with inline data (CARDS4 statement). It also uses the '_htcook' environment macro variable to retrieve client cookies, which is an external source provided by the SAS application server.

1 Code Block

DATA STEP

Explanation :
This DATA _NULL_ step uses the special output destination '_webout' to begin generating an HTML page. The HTML and JavaScript code, which is read as inline data via the CARDS4 statement, is written directly to the web output stream. The included JavaScript handles user events (clicks, mouse movements) to open and close a pop-up window.

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1	DATA _null_ ;
2	INPUT ;
3	file _webout ;
4	put _infile_ ;
5	cards4 ;_card_content_;
6	;;;;
7	RUN ;

2 Code Block

DATA STEP

Explanation :
This second DATA _NULL_ step continues to write to the '_webout' output. It adds a title for a cookie section, decodes and displays the content of the Stored Process macro variable '_htcook' (which contains browser cookies), then closes the HTML tags of the page.

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1	DATA _null_ ;
2	file _webout ;
3	put '<h1>Cookies</h1>' ;
4	htcook=htmldecode("&_htcook") ;
5	put htcook ;
6	put '</body>' ;
7	put '</html>' ;
8	RUN ;

3 Code Block

Macro

Explanation :
The %STPBEGIN and %STPEND macros are markers used by the SAS Stored Processes framework to delimit the code to be executed. The following line of code is a defensive programming technique to ensure proper termination of macro calls in any context.

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1	%STPBEGIN;
2	%STPEND;
3	';"*/;RUN;

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