miércoles, 29 de mayo de 2013

Get final HTML markup of a JavaScript application using rhino - envjs

This article briefly describes how to dump the final HTML markup of any web site using serverside tool rhino-envjs. We will work into the release root folder so "cd" to it.

step 1 - download latest envjs release (as this writing 1.2) and uncompress it.
step 2 - download ant and run "ant" on the previously uncompressed envjs folder. This should build envjs. step 3 - create the file test1.js with the following content: 
load('dist/env.rhino.js');
var url = "http://jquery.com"; 
window.location = url; 
print(document.innerHTML+"");
step 4 - in a shell enter the following command:
java -cp rhino/js.jar org.mozilla.javascript.tools.shell.Main \
  -opt -1 test1.js > test1.html

If everything was fine you can open the generated file test1.html with firefox and see the jquery generated markup, not a very visual replica but often useful for SEO and those. For each JavaScript error a Java exception will be printed on stderr.

In my case this is useful for 100% JavaScript web applications SEO support.

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I've tried your example and it brings the very same source page just like no actual processing (JavaScript) had been done and ajax calls never invoked. Does this actually work? Any suggestions on what I might do wrong? Thank you.