mod_perl: Input and Output FiltersIntroducing Filters You certainly already know how filters work, because you encounter filters so often in real life. If you are unfortunate to live in smog-filled cities like Saigon or Bangkok you are probably used to wear a dust filter mask: If you are smoker, chances are that you smoke cigarettes with filters: If you are a coffee gourmand, you have certainly tried a filter coffee: The shower th
