Writing an HTML Preprocessor

**thetinman** · 09-17-2007

I'm trying to write an HTML preprocessor. What is the best way to go about this? Should I read the entire file into a character array first, and then process that? Should I read it into an array of strings instead?

Basically I have an HTML file, like the one below.

Code:

<html>
<title></title>
<body>

<h1>This is an HTML file.</h1> 

#insert HelloWorld.html                 

</body>
</html>

When I run the preprocessor on the above HTML code, the line that reads "#insert HelloWorld.html" is replaced by the contents of the file "HelloWorld.html."

**CornedBee** · 09-17-2007

Depends on how complex your transformation is. If it's just preprocessor-like directives, streaming the file through a filter is sufficient, and much more memory-efficient than reading it whole.
XSLT, on the other hand, is so complex that it must parse both the style sheet and the file it works on in full before being able to do anything.

Writing an HTML Preprocessor

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