Merge branch 'master' of https://github.com/stefanprodan/WebApiThrottle

Author: stefanprodan

README.md

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+WebApiThrottle
+==============
+
+ASP.NET Web API Throttling handler is designed for controlling the rate of requests that clients 
+can make to an Web API based on IP address, client API key and request route.
+
+Web API throttling can be configured using the built-in ThrottlePolicy, you can set multiple limits 
+for different scenarios like allowing an IP or Client to make a maximum number of calls per second, per minute, per hour or even per day.
+You can define these limits to address all requests made to an API or you can scope the limits to each API route.  
+
+###Global throttling based on IP
+
+The setup bellow will limit the number of requests originated from the same IP. 
+If from the same IP, in same second, you'll make a call to <code>api/values</code> and <code>api/values/1</code> the last call will get blocked.
+
+``` cs
+public static class WebApiConfig
+{
+	public static void Register(HttpConfiguration config)
+	{
+		config.MessageHandlers.Add(new ThrottlingHandler()
+		{
+			Policy = new ThrottlePolicy(perSecond: 1, perMinute: 20, perHour: 200, perDay: 1500)
+			{
+				IpThrottling = true
+			},
+			Repository = new CacheRepository()
+		});
+	}
+}
+```
+
+###Endpoint throttling based on IP
+
+If from the same IP, in same second, you'll make two calls to <code>api/values</code> the last call will get blocked.
+But if in the same second you'll call <code>api/values/1</code> too, the request will get throw because it's a different route.
+
+``` cs
+config.MessageHandlers.Add(new ThrottlingHandler()
+{
+	Policy = new ThrottlePolicy(perSecond: 1, perMinute: 30)
+	{
+		IpThrottling = true,
+		EndpointThrottling = true
+	},
+	Repository = new CacheRepository()
+});
+```
+
+###Endpoint throttling based on IP and Client Key
+
+If a client (identified by an unique API key) from the same IP, in same second, makes two calls to <code>api/values</code>, then the last call will get blocked. 
+If you want to apply limits to clients regarding of their IPs then you should set IpThrottling to false.
+
+``` cs
+config.MessageHandlers.Add(new ThrottlingHandler()
+{
+	Policy = new ThrottlePolicy(perSecond: 1, perMinute: 30)
+	{
+		IpThrottling = true,
+		ClientThrottling = true,
+		EndpointThrottling = true
+	},
+	Repository = new CacheRepository()
+});
+```
+
+###IP and/or Client Key White-listing
+
+If requests are initiated from an white-listed IP or Client, then the throttling policy will not be applied and the requests will not get stored. 
+
+``` cs
+config.MessageHandlers.Add(new ThrottlingHandler()
+{
+	Policy = new ThrottlePolicy(perSecond: 2, perMinute: 60)
+	{
+		IpThrottling = true,
+		IpWhitelist = new List<string> { "::1", "10.0.0.1" },
+		
+		ClientThrottling = true,
+		ClientWhitelist = new List<string> { "admin-key" }
+	},
+	Repository = new CacheRepository()
+});
+```
+
+###IP and/or Client Key custom rate limits
+
+You can define custom limits for known IPs or Client Keys, these limits will override the default ones. Be aware that a custom limit will work only if you have defined a global counterpart.
+
+``` cs
+config.MessageHandlers.Add(new ThrottlingHandler()
+{
+	Policy = new ThrottlePolicy(perSecond: 1, perMinute: 20, perHour: 200, perDay: 1500)
+	{
+		IpThrottling = true,
+		IpRules = new Dictionary<string, RateLimits>
+		{ 
+			{ "192.168.0.1", new RateLimits { PerSecond = 2 } },
+			{ "192.168.1.2", new RateLimits { PerMinute = 30, PerHour = 30*60, PerDay = 30*60*24 } }
+		},
+		
+		ClientThrottling = true,
+		ClientRules = new Dictionary<string, RateLimits>
+		{ 
+			{ "api-client-key-1", new RateLimits { PerMinute = 40, PerHour = 400 } },
+			{ "api-client-key-9", new RateLimits { PerDay = 2000 } }
+		}
+	},
+	Repository = new CacheRepository()
+});
+```