site saving script. only _webdl.bat need (other uses cpp regex)

_webdl.bat

@echo off

rem webpage downloader: wget and sed for windows required

wget -k -E --default-page=webdl.html %1

setlocal enableDelayedExpansion

if exist webdl.html (

	if [%2]==[] (

		for /f "delims=" %%i in ('type webdl.html ^| sed -En "s/.*?<title>(.*?)<\/title>.*/\1/p"') do set n=%%i

		set n=!n::=!
		set n=!n:/=!
		set n=!n:\=!
		set n=!n:"=!
		set n=!n:<=!
		set n=!n:>=!
		set n=!n:^|=!

		echo renaming webdl.html to !n!.html
		ren webdl.html "!n!".html

		) else (

			set n=%2
			set n=!n:.html=!
			echo renaming webdl.html to !n:"=!.html
			ren webdl.html !n!.html

		)

	)

endlocal

main.cpp

#include <iostream>
#include <fstream>
#include <string>
#include <regex>

using namespace std;

int main(int argc, char* const argv[]){

    if(argc == 1){
    	cerr << "no file specified";
    	return 0;
    }

    if(argc == 2){
    	cerr << "no regex specified";
    	return 0;
    }

	fstream file;
	file.open(argv[1]);

	if(file.fail()){
		cerr << "could not open " << argv[1];
		return 0;
	}

	string str, fstr;

	while(getline(file, str)){
		fstr += (str+'\n');
	}

    regex e(argv[2]);
    smatch match;
    regex_search (fstr,match,e);

	if(match.size()){
		cout << match[match.size()-1];
	}

	return 0;
}

webdl.bat

@echo off

wget -k -E --default-page=webdl.html %1

setlocal enableDelayedExpansion

if exist webdl.html (

	if [%2]==[] (

		for /f "delims=" %%i in ('fregex webdl.html "<title>(.*?)</title>"') do set n=%%i

		set n=!n::=!
		set n=!n:/=!
		set n=!n:\=!
		set n=!n:"=!
		set n=!n:<=!
		set n=!n:>=!
		set n=!n:^|=!

		echo renaming webdl.html to !n!.html
		ren webdl.html "!n!".html

		) else (

			set n=%2
			set n=!n:.html=!
			echo renaming webdl.html to !n:"=!.html
			ren webdl.html !n!.html

		)

	)

endlocal