Add mDNS and name resolution support

src/LCBUrl.cpp

@@ -38,6 +38,7 @@ LCBUrl::LCBUrl()
 {
     rawurl = "";
     url = "";
+    ipurl = "";
     workingurl = "";
     scheme = "";
     stripscheme = "";
@@ -47,8 +48,10 @@ LCBUrl::LCBUrl()
     username = "";
     password = "";
     host = "";
+    ipaddress = INADDR_NONE;
     port = 65535;
     authority = "";
+    ipauthority = "";
     pathsegment = "";
     path = "";
     removedotsegments = "";
@@ -69,13 +72,13 @@ bool LCBUrl::setUrl(const String &newUrl)
     }
     else
     {
+        getIP(); // We neeed to try this up front and pre-cache
         return true;
     }
 }
 
 String LCBUrl::getUrl()
 {
-
     if (url.length() == 0)
     {
         url = "";
@@ -102,6 +105,42 @@ String LCBUrl::getUrl()
     return url;
 }
 
+String LCBUrl::getIPUrl()
+{
+    if (url.length() == 0)
+    {
+        url = "";
+        url.concat(getScheme()); // http or https
+        url.concat(F("://"));
+        url.concat(getIPAuthority()); // Username, password, host and port
+        url.concat(F("/"));
+        url.concat(getPath()); // Path
+        if (getQuery() != "") // Add a query string
+        {
+            url.concat(F("?"));
+            url.concat(getQuery());
+        }
+        if (getFragment() != "") // Add a fragment
+        {
+            url.concat(F("#"));
+            url.concat(getFragment());
+        }
+        if ((getScheme() == "") || (getHost() == "")) // No idea what I was thinking here
+        {
+            return url;
+        }
+    }
+    return url;
+}
+
+bool LCBUrl::isMDNS()
+{
+    return getHost().endsWith(".local");
+    // Can use following for C++
+    // return host.size() >= suffix.size() && 0 == host.compare(host.size()-suffix.size(), suffix.size(), suffix);
+}
+
+
 String LCBUrl::getScheme()
 { // Currrently only finds http and https as scheme
     if (scheme.length() == 0)
@@ -204,6 +243,32 @@ String LCBUrl::getHost()
     return host;
 }
 
+IPAddress LCBUrl::getIP()
+{
+    IPAddress returnIP = INADDR_NONE;
+
+    // First try to resolve the address fresh
+    int err = 0;
+    err = WiFi.hostByName(getHost().c_str(), returnIP) ;
+
+    if(err == 1)
+    {
+        ipaddress = returnIP;
+    }
+    else
+    {
+        Serial.print(F("DEBUG: hostByName() failed for "));
+        Serial.print(getHost().c_str());
+        Serial.print(". Error code: (");
+        Serial.print(err);
+        Serial.println(F(")"));
+    }
+
+    // If we got a new IP address, we will use it.  Otherwise
+    // we will use last known good (if there is one)
+    return ipaddress;
+}
+
 word LCBUrl::getPort()
 {
     // Port will be any integer between : and / in authority
@@ -266,6 +331,39 @@ String LCBUrl::getAuthority()
     return authority;
 }
 
+String LCBUrl::getIPAuthority()
+{
+    if (ipauthority.length() == 0)
+    {
+        ipauthority = "";
+        if (getUserName().length() > 0)
+        {
+            ipauthority = getUserName();
+        }
+        if (getPassword().length() > 0)
+        {
+            ipauthority.concat(F(":"));
+            ipauthority.concat(getPassword());
+        }
+        if (ipauthority.length() > 0)
+        {
+            ipauthority.concat(F("@"));
+        }
+        ipauthority.concat(getIP());
+        if (getPort() > 0)
+        {
+            if (
+                ((getScheme() == F("http")) && (port != 80)) ||
+                ((getScheme() == F("https")) && (port != 443)))
+            {
+                ipauthority.concat(F(":"));
+                ipauthority.concat(String(getPort()));
+            }
+        }
+    }
+    return ipauthority;
+}
+
 String LCBUrl::getPath()
 {
     if (path.length() == 0)

src/LCBUrl.h

@@ -31,6 +31,13 @@
 #ifndef _LCBURL_H
 #define _LCBURL_H
 
+#ifdef ESP8266
+#include <ESP8266WiFi.h>
+#endif
+#ifdef ESP32
+#include <WiFi.h>
+#endif
+
 #include <string.h>
 #include <Arduino.h>
 
@@ -42,14 +49,18 @@ class LCBUrl
     LCBUrl();
     ~LCBUrl(){};
     bool setUrl(const String &);
+    bool isMDNS();
     String getUrl();
+    String getIPUrl();
     String getScheme();
     String getUserInfo();
     String getUserName();
     String getPassword();
     String getHost();
+    IPAddress getIP();
     word getPort();
     String getAuthority();
+    String getIPAuthority();
     String getPath();
     String getAfterPath();
     String getQuery();
@@ -65,6 +76,7 @@ class LCBUrl
     String getPathSegment();
     String rawurl;
     String url;
+    String ipurl;
     String workingurl;
     String scheme;
     String stripscheme;
@@ -74,8 +86,10 @@ class LCBUrl
     String username;
     String password;
     String host;
+    IPAddress ipaddress;
     word port;
     String authority;
+    String ipauthority;
     String pathsegment;
     String path;
     String removedotsegments;