From f3e950dd4a925df1ded6334249ca43ecca5d4685 Mon Sep 17 00:00:00 2001
From: epochqwert <epoch@hacking.allowed.org>
Date: Sun, 20 Aug 2017 11:17:52 +0000
Subject: moved url functions into url.h

---
 url.h | 144 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 142 insertions(+), 2 deletions(-)

(limited to 'url.h')

diff --git a/url.h b/url.h
index 625f0b1..df0ef90 100644
--- a/url.h
+++ b/url.h
@@ -1,6 +1,11 @@
 #ifndef URL_H
 #define URL_H
 
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
 struct url {
  char *scheme;
  char *username;
@@ -12,6 +17,141 @@ struct url {
  char *fragment_id;
 };
 
-void urlfromline(struct url *,char *);
-void magic_and_defaults(struct url *);
+
+/*
+ schemes are case sensitive but cononicals are lower case.
+ domain is case insensitive. return it lowercased?
+ port is optional and in decimal
+ path
+ scheme://username:password@domain:port/path?query_string#fragment_id
+ mailto:username@domain
+
+ optional stuff:
+ scheme, username, password, port, path, query_string, fragment_id
+*/
+
+void urlfromline(struct url *u,char *line) {
+ int i;
+  //split at first single / into line and path
+  for(i=0;line[i];i++) {
+   if(line[i] == '/' && line[i+1] == '/') {
+    i++;
+    continue;
+   }
+   if(line[i] == '/') {
+    line[i]=0;
+    u->path=line+i+1;
+    break;
+   }
+  }
+  if(u->path) {
+   if(strchr(u->path,'?')) {
+    u->query_string=strchr(u->path,'?');
+    *u->query_string=0;
+    u->query_string++;
+   }
+  }
+
+  if(u->query_string) {
+   if(strchr(u->query_string,'#')) {
+    u->fragment_id=strchr(u->query_string,'#');
+    *u->fragment_id=0;
+    u->fragment_id++;
+   }
+  }
+
+  if(strstr(line,"://")) {
+   u->scheme=line;
+   u->domain=strstr(line,"://");
+   *u->domain=0;
+   u->domain+=3;
+  } else {
+   u->domain=line;
+  }
+
+  if(u->domain) {
+   if(strchr(u->domain,'@')) {
+    u->username=u->domain;
+    u->domain=strchr(u->domain,'@');
+    *u->domain=0;
+    u->domain++;
+   }
+  }
+
+  if(u->username) {
+   if(strchr(u->username,':')) {
+    u->password=strchr(u->username,':');
+    *u->password=0;
+    u->password++;
+   }
+  }
+
+  if(u->domain) {
+   if(strchr(u->domain,']')) {//the end of an IPv6 address
+    if(strchr(strchr(u->domain,']'),':')) {
+     u->port=strchr(strchr(u->domain,']'),':');
+     if(u->port[1] == '?') {//for magnet links
+      u->port=0;
+     } else {
+      *u->port=0;
+      u->port++;
+     }
+    }
+   } else {
+    if(strchr(u->domain,':')) {
+     u->port=strchr(u->domain,':');
+     if(u->port[1] == '?') {//for magnet links
+      u->port=0;
+     } else {
+      *u->port=0;
+      u->port++;
+     }
+    }
+   }
+  }
+
+  if(u->domain) {//for magnet links.
+   if(strchr(u->domain,'?')) {
+    u->query_string=strchr(u->domain,'?');
+    *u->query_string=0;
+    u->query_string++;
+   }
+  }
+
+  if(strchr(u->domain,':') && !strchr(u->domain,']')) {//for scheme:?query_string
+   u->scheme=u->domain;
+   *strchr(u->scheme,':')=0;
+   u->domain=0;
+  }
+
+  if(!u->scheme && u->username) {//for mailto:
+   u->scheme=u->username;
+   u->username=u->password;
+   u->password=0;
+  }
+}
+
+#define AorB(a,b) ((a)?(a):(b))
+
+void magic_and_defaults(struct url *u) {
+  struct servent *serv;
+  char sport[10];
+  u->scheme=AorB(u->scheme,AorB(getenv("URL_SCHEME"),"DEFAULT"));
+  u->username=AorB(u->username,AorB(getenv("URL_USERNAME"),"DEFAULT"));
+  u->password=AorB(u->password,AorB(getenv("URL_PASSWORD"),"DEFAULT"));
+  u->domain=AorB(u->domain,AorB(getenv("URL_DOMAIN"),"DEFAULT"));
+  serv=getservbyname(u->scheme,strcmp(u->scheme,"udp")?"tcp":"udp");//gets default port for the scheme. http -> 80
+  if(serv) snprintf(sport,sizeof(sport)-1,"%d",ntohs(serv->s_port));
+//  else snprintf(sport,sizeof(sport)-1,"%d",serv);
+  u->port=AorB(u->port,AorB(getenv("URL_PORT"),(serv||1?strdup(sport):"DEFAULT")));
+
+//  if(!strcmp(u->port,"DEFAULT")) {
+   //this shouldn't happen most of the time. :/
+//   printf("serv: %d\nsport: %s\nu->scheme: %s\n",serv,sport,u->scheme);
+//  }
+
+  u->path=AorB(u->path,AorB(getenv("URL_PATH"),"DEFAULT"));
+  u->query_string=AorB(u->query_string,AorB(getenv("URL_QUERY_STRING"),"DEFAULT"));
+  u->fragment_id=AorB(u->fragment_id,AorB(getenv("URL_FRAGMENT_ID"),"DEFAULT"));
+}
 #endif
-- 
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