New example of IP blocking

edgecompute/examples/traffic-filtering/README.md

@@ -5,8 +5,9 @@ The examples in this section describe how to use EdgeWorkers to control traffic
 * **/conference-details**: This code implements an API call to validate a conference code
 * **/trace-headers**: Demonstrates how EdgeWorkers can be used to inspect forward request headers during the lifetime of a request
 * **/traffic-allow-list**: Implements an allow list depending on the geographic locale of the end user. 
+* **/block-based-on-ip**: Implements a block list depending on ip addresses. 
 
 ## Related Resources
 - [EdgeWorkers CLI](https://developer.akamai.com/cli/packages/edgeworkers.html)
 - [EdgeWorkers documentation](https://techdocs.akamai.com/edgeworkers/docs)
-- [EdgeKV documentation](https://techdocs.akamai.com/edgekv/docs)
+- [EdgeKV documentation](https://techdocs.akamai.com/edgekv/docs)

edgecompute/examples/traffic-filtering/block-based-on-ip/README.md

@@ -0,0 +1,28 @@
+# block-based-on-ip
+
+*Keyword(s):* constructed-response, edge logic, blocklist, allow list<br>
+*[Since](https://techdocs.akamai.com/edgeworkers/docs/about-the-javascript-api):* 1.0
+
+This example implements a block list depending on ip addresses. If a user's IP address is on the list, a 403 deny will occur.
+
+## Usage Examples
+````
+// Incoming Request
+GET / HTTP/1.1
+Host: www.example.com
+(User's IP in a list)
+
+// Response to Browser
+HTTP/1.1 403 Forbidden
+{}
+````
+## Property Variable
+To enable EdgeWorker to get a user's IP address, the Set Variable behavior must be configured in Property Manager.
+![Property Variable](propertyvariable.png)
+![Set Variable](setvariable.png)
+
+## Similar Uses
+Allowlist or blocklist capabilities can be setup based on other end user request context information such as connecting IP, Geo, Device Characteristics, Accept-Language, User-Agent, etc. 
+
+## Resources
+See the repo [README](https://github.com/akamai/edgeworkers-examples#Resources) for additional guidance.

edgecompute/examples/traffic-filtering/block-based-on-ip/bundle.json

@@ -0,0 +1,4 @@
+{
+  "edgeworker-version": "0.1",
+  "description" : "Deny based on ip list"
+}

edgecompute/examples/traffic-filtering/block-based-on-ip/ipList.js

@@ -0,0 +1,4 @@
+export const blockedIPs = [
+  '1.2.3.4',
+  '5.6.7.8'
+];

edgecompute/examples/traffic-filtering/block-based-on-ip/main.js

@@ -0,0 +1,14 @@
+import { blockedIPs } from './ipList.js';
+
+export async function onClientRequest(request) {
+    const clientIP = request.getVariable('PMUSER_IP');
+
+    if (blockedIPs.includes(clientIP)) {
+        request.respondWith(
+            403, 
+            { 'Content-Type': ['application/json;charset=utf-8'] }, 
+            '{}', 
+            'Denied Response'
+        );
+    }
+}