04-22-2013
How to use regexp to find an ipaddress from a query string?
I need help with a regexp to find out the ip address which can possibly be present in a URL.
The URLs can be in any of the following form
<domain>?a=12345&d=somestring1
<domain>?c=10.10.10.100&d=somestring1
<domain>?a=12345&b=somestring1&c=10.1.2.4d=somestring2
<domain>?a=12345&c=10.1.2.4&b=somestring1&d=somestring2
The rules
1) "c=" may not always be present
2) "c=" can be anywhere in the string but not the last, last is always "d"
3) If "c=" is present I need the value of c which should be an ip address.
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LEARN ABOUT DEBIAN
shevek_regexp
shevek::regexp(3) Library Functions Manual shevek::regexp(3)
NAME
shevek::regexp -
Use regular expressions.
SYNOPSIS
#include <regexp.hh>
Public Member Functions
regexp (std::string const &pattern=std::string(), bool case_sensitive=false)
Create a new object, and optionally fill it with a pattern.
regexp & operator= (std::string const &pattern)
Set a pattern, removing the previous one.
regexp (regexp const &that)
Copy a regexp.
regexp & operator= (regexp const &that)
Copy a regexp.
void case_sensitive (bool value=true)
Set whether the evaluation should be case sensitive.
~regexp ()
Destructor, this cleans up internal structures.
bool operator() (std::string const &data)
Check whether the pattern matches a string, and fill internal match structures if it does.
std::string operator[] (unsigned idx) const
Retrieve the value of a subexpression from the last matched string.
bool valid (unsigned idx) const
Test whether a subexpression was filled by the last matching string.
unsigned size () const
Get the number of subexpression.
std::string transform (std::string const &data) const
Transform a string with -codes according to the last matching string.
std::string const & pattern () const
Get the current pattern.
Detailed Description
Use regular expressions.
Member Function Documentation
std::string shevek::regexp::operator[] (unsignedidx) const
Retrieve the value of a subexpression from the last matched string. This throws an exception if the subexpression is not valid.
Author
Generated automatically by Doxygen for libshevek from the source code.
libshevek Fri May 11 2012 shevek::regexp(3)