proxy.h

#include <stdio.h>
#include <ctype.h>

// this the standard to convert urls to string w/o special chars
// we need to convert the url so that we can have files with names
// represneting their url
void url_encode(unsigned char *s, char *enc)
{
	char rfc3986[256] = {0};
	int i = 0;
	for (; i < 256; i++) {
		rfc3986[i] = isalnum(i)||i == '~'||i == '-'||i == '.'||i == '_'
			? i : 0;
	}
	
	char *tb = rfc3986;
	
	for (; *s; s++) {
		if (tb[*s]) sprintf(enc, "%c", tb[*s]);
		else        sprintf(enc, "%%%02X", *s);
		while (*++enc);
	}
}

void parse_url(char *url, char *hostname, int *port, char *path)
{
	char nurl[1024], nhostname[1024], portstr[16];
	char* tok_str_ptr = NULL;
	int offset = 1;
	
	// copy the original url to work on
	strcpy(nurl, url);
	char *ppath = &(nurl[0]);
	
	// check if the address starts with http://
	// e.g. somehost.com/index.php vs. http://somehost.com/index.php
	if(NULL != strstr(ppath, "http://"))
	{
		ppath = &(nurl[6]);
		offset += 6;
	}
	
	// finding the hostname
	tok_str_ptr = strtok(ppath, "/");
	sprintf(nhostname, "%s", tok_str_ptr);
	
	// check if the hostname also comes with a port no or not
	// e.g. somehost.com:8080/index.php
	if(NULL != strstr(nhostname, ":"))
	{
		tok_str_ptr = strtok(nhostname, ":");
		sprintf(hostname, "%s", tok_str_ptr);
		tok_str_ptr = strtok(NULL, ":");
		sprintf(portstr, "%s", tok_str_ptr);
		*port = atoi(portstr);
	} else {
		sprintf(hostname, "%s", nhostname);
	}
	
	// the rest of the url gives us the path
	// e.g. /index.php in somehost.com/index.php
	ppath = &(url[strlen(hostname) + offset]);
	sprintf(path, "%s", ppath);
	if(strcmp(path, "") == 0)
	{
		sprintf(path, "/");
	}
}