CFLib.org – Common Function Library Project

Description:
Returns the username (ending with either ":" or "@") for the passed URL. If no user is found, then returns an empty string. Works with any protocol that follows a "username:password@" syntax including ftp, telnet, and imap and others.

Return Values:
Returns a string.

Example:

<cfoutput>
#GetUsernameFromURL("telnet://guest:pass@somehost.com:21/")#<br>
#GetUsernameFromURL("guest:pass@somehost.com")#<br>
#GetUsernameFromURL("http://host.com/")#<br>
#GetUsernameFromURL("ftp://me:@host.com/")#<br>
#GetUsernameFromURL("ftp://me@host.com/")#<br>
#GetUsernameFromURL("ftp://:@host.com/")#<br>
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Returns the username from a specified URL.
 * Modified to handle differences in regex in cf5/mx. Thanks to Tom Lane for pointing out the issue.
 * 
 * @param this_url      URL to parse. (Required)
 * @return Returns a string. 
 * @author Shawn Seley (shawnse@aol.com) 
 * @version 2, August 23, 2002 
 */
function GetUsernameFromURL(this_url) {
    var first_char       = "";
    var re_found_struct  = "";
    var num_expressions  = 0;
    
    this_url = trim(this_url);
    
    first_char = Left(this_url, 1);
    if (Find(first_char, "./")) {
        return "";   // relative URL = no username (ex: "../dir1/filename.html" or "/dir1/filename.html")
    } else if(Find("://", this_url)){
        // absolute URL    (ex: "ftp://user:pass@ftp.host.com")
        re_found_struct = REFind("(([^:@]*:)[^:@]*@)|([^:@]*@)", this_url, Find("://", this_url)+3, "True");
    } else {
        // abbreviated URL (ex: "user:pass@ftp.host.com")
        re_found_struct = REFind("(([^:@]*:)[^:@]*@)|([^:@]*@)", this_url, 1, "True");
    }
    
    if (re_found_struct.pos[1] GT 0) {
        num_expressions = ArrayLen(re_found_struct.pos);
        if(re_found_struct.pos[num_expressions] is 0) num_expressions = num_expressions - 1;
        return Mid(this_url, re_found_struct.pos[num_expressions], re_found_struct.len[num_expressions]-1);
    } else {
        return "";
    }
}