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NSUrlConnection wrapper class to simplify networking using it with MonoTouch.
using System;
using MonoTouch.Foundation;
using System.Collections.Generic;
using MonoTouch.UIKit;
namespace ESCOZ
{
public class EscozUrlConnection:NSUrlConnection {
private static Dictionary<string, EscozUrlConnection> Connections = new Dictionary<string, EscozUrlConnection>();
public static void KillAllConnections() {
foreach (EscozUrlConnection c in Connections.Values) {
c.Cancel();
}
Connections.Clear();
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
}
protected static void KillConnection(string name) {
Connections[name].Cancel();
Connections.Remove(name);
}
public static void ConnectionEnded(string name) {
Connections.Remove(name);
}
public static bool IsDownloading(string name) {
return Connections.ContainsKey(name);
}
public EscozUrlConnection(string name, NSUrlRequest request, Action<string> c):base(request, new EscozUrlDelegate(name, c), true) {
if (Connections.ContainsKey(name)) {
KillConnection(name);
}
Connections.Add(name, this);
}
public EscozUrlConnection(string name, NSUrlRequest request, Action<string> success, Action failure):base(request, new EscozUrlDelegate(name, success, failure), true) {
if (Connections.ContainsKey(name)) {
KillConnection(name);
}
Connections.Add(name, this);
}
}
public class EscozUrlDelegate : NSUrlConnectionDelegate {
Action<string> callback;
Action _failure;
NSMutableData data;
string _name;
public EscozUrlDelegate(string name, Action<string> success) {
_name = name;
callback = success;
data = new NSMutableData();
}
public EscozUrlDelegate(string name, Action<string> success, Action failure) {
_name = name;
callback = success;
_failure = failure;
data = new NSMutableData();
}
public override void ReceivedData (NSUrlConnection connection, NSData d)
{
data.AppendData(d);
}
public override bool CanAuthenticateAgainstProtectionSpace (NSUrlConnection connection, NSUrlProtectionSpace protectionSpace)
{
return true;
}
bool showError = true;
public override void ReceivedAuthenticationChallenge (NSUrlConnection connection, NSUrlAuthenticationChallenge challenge)
{
if (challenge.PreviousFailureCount>0){
showError = false;
challenge.Sender.CancelAuthenticationChallenge(challenge);
Application.AuthenticationFailure();
return;
}
if (challenge.ProtectionSpace.AuthenticationMethod=="NSURLAuthenticationMethodServerTrust")
challenge.Sender.UseCredentials(NSUrlCredential.FromTrust(challenge.ProtectionSpace.ServerTrust), challenge);
if (challenge.ProtectionSpace.AuthenticationMethod=="NSURLAuthenticationMethodDefault" &&
Application.Account!=null && Application.Account.Login!=null && Application.Account.Password!=null) {
challenge.Sender.UseCredentials(NSUrlCredential.FromUserPasswordPersistance(
Application.Account.Login, Application.Account.Password, NSUrlCredentialPersistence.None), challenge);
}
}
public override void FailedWithError (NSUrlConnection connection, NSError error)
{
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
if (showError)
Application.ShowNetworkError(error.LocalizedDescription);
if (_failure!=null)
_failure();
}
public override void FinishedLoading (NSUrlConnection connection)
{
EscozUrlConnection.ConnectionEnded(_name);
callback(data.ToString());
}
}
}
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