TNT-46700 Add proxy configuration

package.json

@@ -27,5 +27,8 @@
     "lerna": "^4.0.0",
     "prettier": "^2.7.1",
     "pretty-quick": "^3.1.3"
+  },
+  "dependencies": {
+    "undici": "^5.18.0"
   }
 }

packages/target-decisioning-engine/src/artifactProvider.js

@@ -91,6 +91,7 @@ function ArtifactProvider(config, telemetryProvider) {
 
   const fetchWithRetry = getFetchWithRetry(
     fetchApi,
+    config.proxyAgent,
     NUM_FETCH_RETRIES,
     errorMessage => Messages.ERROR_MAX_RETRY(NUM_FETCH_RETRIES, errorMessage),
     error => eventEmitter(ARTIFACT_DOWNLOAD_FAILED, { artifactLocation, error })

packages/target-decisioning-engine/src/geoProvider.js

@@ -126,9 +126,13 @@ export function GeoProvider(config, artifact) {
         headers[HTTP_HEADER_FORWARDED_FOR] = geoRequestContext.ipAddress;
       }
 
-      return fetchApi(geoLookupPath, {
-        headers
-      })
+      const options = { headers };
+
+      if (config.proxyAgent != null) {
+        options.dispatcher = config.proxyAgent;
+      }
+
+      return fetchApi(geoLookupPath, options)
         .then(geoResponse =>
           geoResponse
             .json()

packages/target-decisioning-engine/types/DecisioningConfig.d.ts

@@ -1,5 +1,6 @@
 import { DecisioningArtifact } from "./DecisioningArtifact";
 import { ParseDomainFunc } from "./DecisioningContext";
+import { ProxyAgent } from "undici";
 
 export interface DecisioningConfig {
   /**
@@ -86,4 +87,9 @@ export interface DecisioningConfig {
    * Function used to parse domains
    */
   parseDomainImpl?: ParseDomainFunc;
+
+  /**
+   * Proxy Agent to specify a proxy for the fetch implementation
+   */
+  proxyAgent: ProxyAgent;
 }