How is that different from mod_substitute and/or mod_sed? On May 1, 2013, at 9:22 AM, Joshua Marantz <jmara...@google.com> wrote:
> I have a crazy idea for you. Maybe this is overkill but this sounds like > it'd be natural to add to mod_pagespeed <http://modpagespeed.com> as a new > filter. > > Here's some code you might use as a template > > https://code.google.com/p/modpagespeed/source/browse/trunk/src/net/instaweb/rewriter/collapse_whitespace_filter.cc > > one thing we've thought of doing is providing a generic text-substitution > filter that would take strings in character-blocks and do arbitrary > substitutions in them, that could be specified in the .conf file: > ModPagespeedSubstitute "oldString" "newString" > > You are right that text-blocks in Apache output filters can be split > arbitrarily across buckets, but mod_pagespeed takes care of that in an > HTML-centric way, breaking up blocks on html tokens. A block of free-format > text would be treated as a single atomic token independent of the structure > of the incoming bucket brigade. > > Let me know if you'd like to discuss this further. > > -Josh > > > On Wed, May 1, 2013 at 8:54 AM, Sindhi Sindhi <sindhi....@gmail.com> wrote: > >> Hello, >> >> Thanks a lot for providing answers to my earlier emails with subject >> "Apache C++ equivalent of javax.servlet.Filter". I really appreciate your >> help. >> >> I had another question. My requirement is something like this - >> >> I have a huge html file that I have copied into the Apache htdocs folder. >> In my C++ Apache module, I want to get this html file contents and >> remove/replace some strings. >> >> Say I have a HTML file that has the string "oldString" appearing 3 times in >> the file. My requirement is to replace "oldString" with the new string >> "newString". I have already written a C++ function that has a signature >> like this - >> >> char* processHTML(char* inHTMLString) { >> // >> char* newHTMLWithNewString = <code to replace all occurrences of >> "oldString" with "newString"> >> return newHTMLWithNewString; >> } >> >> The above function does a lot more than just string replace, it has lot of >> business logic implemented and finally returns the new HTML string. >> >> I want to call processHTML() inside my C++ Apache module. As I know Apache >> maintains an internal data structure called Buckets and Brigades which >> actually contain the HTML file data. My question is, is the entire HTML >> file content (in my case the html file is huge) residing in a single >> bucket? Means, when I fetch one bucket at a time from a brigade, can I be >> sure that the entire HTML file data from <html> to </html> can be found in >> a single bucket? For ex. if my html file looks like this - >> <html> >> .. >> .. >> oldString >> ... oldString...........oldString.. >> .. >> </html> >> >> When I iterate through all buckets of a brigade, will I find my entire HTML >> file content in a single bucket OR the HTML file content can be present in >> multiple buckets, say like this - >> >> case1: >> bucket-1 contents = >> "<html> >> .. >> .. >> oldString >> ... oldString...........oldString.. >> .. >> </html>" >> >> case2: >> bucket-1 contents = >> "<html> >> .. >> .. >> oldStr" >> >> bucket-2 contents = >> "ing >> ... oldString...........oldString.. >> .. >> </html>" >> >> If its case2, then the the function processHTML() I have written will not >> work because it searches for the entire string "oldString" and in case2 >> "oldString" is found only partially. >> >> Thanks a lot. >>
