add URL support

Author: Samy Kacimi

README.md

@@ -30,6 +30,12 @@ let filtered_ips = commonregex::ip::v4(&log);
 commonregex::internet::email(&text)
 ```
 
+**URL**
+
+```rust
+commonregex::internet::url(&text)
+```
+
 ### IP Addresses
 
 **IPv4**

src/commonregex/internet.rs

@@ -22,6 +22,28 @@ pub fn email(text: &String) -> Vec<&str> {
     matcher::match_results(text, regex_drawer::internet::EMAIL)
 }
 
+/// Returns matched URLs as a vector of strings
+///
+/// # Arguments
+///
+/// * `text` - A String representing the text in which to search.
+///
+/// # Examples
+///
+/// ```
+/// extern crate commonregex_rs;
+///
+/// use commonregex_rs::commonregex;
+///
+/// let text = String::from("Contribute at https://github.com/fakenine/commonregex-rs !");
+///
+/// assert_eq!(vec!["https://github.com/fakenine/commonregex-rs"], commonregex::internet::url(&text));
+/// ```
+pub fn url(text: &String) -> Vec<&str> {
+    matcher::match_results(text, regex_drawer::internet::URL)
+}
+
+
 #[cfg(test)]
 mod tests {
     use super::*;

src/commonregex/regex_drawer.rs

@@ -1,5 +1,6 @@
 pub mod internet {
     pub const EMAIL: &'static str = r#"(?i)([A-Za-z0-9!#$%&'*+/=?^_{|.}~-]+@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)"#;
+    pub const URL: &'static str = r#"(?:(?:https?://)?(?:[a-z0-9.\-]+|www|[a-z0-9.\-])[.](?:[^\s()<>]+|\((?:[^\s()<>]+|(?:\([^\s()<>]+\)))*\))+(?:\((?:[^\s()<>]+|(?:\([^\s()<>]+\)))*\)|[^\s!()\[\]{};:'".,<>?]))"#;
 }
 
 pub mod ip {