MakeHttpRequest sample

[jimmarlowe]

I was trying to figure out if I needed this kind of service in the Anarchy server, and since there are no samples of it, I made one. It reads the urho3d sourceforge page and gleans some information from it.


// This first example, maintaining tradition, prints a "Hello World" message.
// Furthermore it shows:
//     - Using the Sample utility functions as a base for the application
//     - Adding a Text element to the graphical user interface
//     - Subscribing to and handling of update events
// Example of network.MakeHttpRequest() GET - JM

#include "Scripts/Utilities/Sample.as"
String patchInstructions;  // sample app needs this, we dont
String urlstr, message = "Hello Http from Urho3D!";  // our globals
HttpRequest@ http = null;

void Start()
{
   SampleStart();  // Execute the common startup for samples
   CreateText();  // Create "Hello World" Text
   SubscribeToEvents(); // Finally, hook-up this HelloWorld instance to handle update events
}

void CreateText()
{
   Text@ helloText = Text("helloUrho3d"); // Construct new Text object
   message = "Hello Http from Urho3D!";  // Set String to display
   helloText.text = message;
   helloText.SetFont(cache.GetResource("Font", "Fonts/Anonymous Pro.ttf"), 12 );  // Set font
   helloText.color = Color(0.0f, 1.0f, 0.0f);  // Set text color
   helloText.horizontalAlignment = HA_CENTER; // Align Text center-screen
   helloText.verticalAlignment = VA_CENTER;
   ui.root.AddChild(helloText); // Add Text instance to the UI root element
}

void SubscribeToEvents()
{
   SubscribeToEvent("Update", "HandleUpdate");   // Subscribe HandleUpdate() function for processing update events
}

void HandleUpdate(StringHash eventType, VariantMap& eventData)
{
   if ( http is null ) // create and preform the http request
   {
       const String url = "http://sourceforge.net/projects/urho3d/", verby = "GET", post = "";
       Array <String> headr;
       http = network.MakeHttpRequest( url, verby, headr, post );
       log.Info ( "MakeHttpRequest url "+ url + " headers = " + ( headr.length> 0 ? headr[0] :"no headers" ) + " post = " + post );
       message += "\nMakeHttpRequest " + verby + " " + url
               + ", headers = " + ( headr.length> 0 ? headr[0] :"no headers" ) + ", post = " + post;
   }
   
   if ( (http !is null) && http.state == HTTP_OPEN ) // collect url data
   {
       message += "\nhttp connection is open, reading " + String(http.size) + " bytes.";  // fyi, size gives really big result.
       Text@ mytext = ui.root.GetChild("helloUrho3d");
       mytext.text = message;
       do
       {
           urlstr += http.ReadString();
       }
       while ( http.availableSize > 0 );  // add to string if it gets buffered
       message += "\nread " + String(urlstr.length) + " bytes.";
       mytext.text = message;
       log.Info ( message );
   }

   if ( (http !is null) && http.state == HTTP_ERROR ) // someone broke the internet, again.
   {
       log.Error( http.error + ", for url = " + http.url );
       message +=  "\nError " + http.error + "\nPress escape to exit";
       Text@ mytext = ui.root.GetChild("helloUrho3d");
       mytext.text = message;
       input.SetMouseVisible (true);   // give the user control back
       UnsubscribeFromEvent("Update"); // we are done with http, stop looping
   }

  if ( (http !is null) && http.state == HTTP_CLOSED ) // we are so done.
  {
       message += "\nCompleted reading url " + http.url + "\n\n";

       // html is so hard to parse, these are hacks
       int dlgt = -1, dllt = -1, dlnum = urlstr.Find ( "call-to-action-stats", 0 );
       if ( dlnum > -1 )  // we found the offending key for number of downloads
       {
           message += "\nThe web page says :";
           dlgt = urlstr.Find( ">", dlnum );
           dllt = urlstr.Find( "<", dlgt );
           String cap1 = urlstr.Substring ( dlgt+1, dllt-dlgt-1 ); // grab the text around stats
           message += "\n    Urho3d has " + cap1 + " this week.";
       }
       dlnum = urlstr.Find ( "/projects/urho3d/files/latest/download" );  
       if ( dlnum > -1 )  // we found the offending key for latest download
       {
           dlgt = urlstr.Find( "Download", dlnum );
           dllt = urlstr.Find( "MB", dlgt );
           String cap2 = urlstr.Substring ( dlgt, dllt-dlgt+2 );  // grab more text
           message += "\n    " + cap2;
       }
       message += "\n\nPress escape to exit\n";
       Text@ mytext = ui.root.GetChild("helloUrho3d");
       mytext.text = message;
       log.Info ( message );
       input.SetMouseVisible (true);   // give the user control back
       UnsubscribeFromEvent("Update"); // we are done with http, stop looping
   }
}





[BlueMagnificent]

Sorry for late reply...

Like which category of information is planned to be transmitted using this

[jimmarlowe]

The area of investigation was to see how much of the Civetweb server (formerly mongoose) actually got exposed in Urho3D. And the answer is, not much, certianly not the ability to start a server (in Angelscript). Since the current Urho3D network protocols are so application specific, my thought was to also start a Civetweb http server to make a web page to show what the server was doing and a player summary. It could grow into other functions too, downloading maps, like voting for maps, a better rcon. It could probably be done in C++, threads and mutexes would get involved, and then html+javacript for the website. It can wait, maybe in the meantime Urho3D will switch to Raknet, and get clientside prediction.