Search and replace policy (#56)

* Added ‘SearchAndReplace’ Apigee policy

* Renamed to ‘SearchAndReplaceResponse’

* Fixed typo

* Removed any ES6 syntax

* Added SearchAndReplaceResponse Apigee policy to sandbox

* Added JS file

* Updated name

* Moved flow in to the TargetEndpoint

* Updated the search and replace JS

* Debugging basePath and subdomain

* Debug context

* Debugging proxyRequest and targetRequest

* WIP

* Added timestamp

* WIP

* WIP

* WIP

* WIP

* WIP

* Using target.name in API host name

* Removed switch statement

* Using a request.url

* Removed targetName

* Updated JS

* Added check for ‘api.nhs.uk’ too

* Added api.nhs.uk

* Added a check for ‘api’

* Added debugging for ‘requestUrl’ and ‘environmentSubdomain’

* Moved ‘item’ variable outside the ‘for’ loop

* WIP: AssignMessage.CopyRequest

* Commented out the ‘CopyRequest’ flow

* Using ‘requestHostnameEnv’ in SearchAndReplaceResponse.js

* Debugging ‘requestHostnameEnv’ variable

* Removed debugging

Author: adrianparr

proxies/live/apiproxy/resources/jsc/RewriteHostName.js

@@ -0,0 +1,19 @@
+var response = context.getVariable("response.content");
+var json = JSON.parse(response);
+
+if (json.place) {
+  // Loop over each item in the search result array, re-writing the hostname to that of the initial request
+  json.place.forEach(value => {
+    var request_hostname = context.getVariable("request_hostname_env");
+    // Annoyingly, Apigee's version of JS doesn't support regex look-behinds,
+    // so we grab the env string including https:// prefix
+    var hostname_regex = /(^https:\/\/([a-zA-Z\-]+\.)+)nhs\.uk/gm;
+    var rewritten_url = value.url.replace(hostname_regex, "https://" + request_hostname);
+    value.url = rewritten_url;
+    // value.url = value.url.replace("api-version=1", "api-version=2");
+    // value.url = value.url.replace("service-search", "service-search-api");
+  });
+
+  // Update the response payload with the corrected urls
+  context.setVariable("message.content", JSON.stringify(json));
+}

proxies/live/apiproxy/resources/jsc/SearchAndReplaceResponse.js

@@ -1,81 +1,67 @@
-// An example requestUrl would be https://internal-dev-sandbox.apis.ptl.api.platform.nhs.uk/nwca-48/conditions/
-var requestUrl = context.getVariable("request.url");
-var environmentSubdomain = requestUrl.split("/");
-environmentSubdomain = environmentSubdomain[2];
-environmentSubdomain = environmentSubdomain.split(".");
-environmentSubdomain = environmentSubdomain[0];
-
-var apiVersion2Host;
-if (
-  environmentSubdomain === "api" ||
-  environmentSubdomain === "apis" ||
-  environmentSubdomain === "prod"
-) {
-  apiVersion2Host = "api.service.nhs.uk";
-} else {
-  apiVersion2Host = environmentSubdomain + ".api.service.nhs.uk";
-}
+var requestHostnameEnv = context.getVariable("request_hostname_env");
 
 var searchAndReplaceStrings = [
   {
     searchFor: "www.nhs.uk/conditions/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/conditions/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/conditions/",
   },
   {
     searchFor: "www.nhs.uk/live-well/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/live-well/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/live-well/",
   },
   {
     searchFor: "www.nhs.uk/medicines/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/medicines/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/medicines/",
   },
   {
     searchFor: "www.nhs.uk/nhs-services/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/nhs-services/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/nhs-services/",
   },
   {
     searchFor: "www.nhs.uk/pregnancy/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/pregnancy/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/pregnancy/",
   },
   {
     searchFor: "www.nhs.uk/common-health-questions/",
     replaceWith:
-      apiVersion2Host + "/nhs-website-content/common-health-questions/",
+      requestHostnameEnv + "/nhs-website-content/common-health-questions/",
   },
   {
     searchFor: "www.nhs.uk/mental-health/",
     replaceWith:
-      apiVersion2Host + "api.service.nhs.uk/nhs-website-content/mental-health/",
+      requestHostnameEnv +
+      "api.service.nhs.uk/nhs-website-content/mental-health/",
   },
   {
     searchFor: "api.nhs.uk/conditions/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/conditions/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/conditions/",
   },
   {
     searchFor: "api.nhs.uk/live-well/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/live-well/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/live-well/",
   },
   {
     searchFor: "api.nhs.uk/medicines/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/medicines/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/medicines/",
   },
   {
     searchFor: "api.nhs.uk/nhs-services/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/nhs-services/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/nhs-services/",
   },
   {
     searchFor: "api.nhs.uk/pregnancy/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/pregnancy/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/pregnancy/",
   },
   {
     searchFor: "api.nhs.uk/common-health-questions/",
     replaceWith:
-      apiVersion2Host + "/nhs-website-content/common-health-questions/",
+      requestHostnameEnv + "/nhs-website-content/common-health-questions/",
   },
   {
     searchFor: "api.nhs.uk/mental-health/",
     replaceWith:
-      apiVersion2Host + "api.service.nhs.uk/nhs-website-content/mental-health/",
+      requestHostnameEnv +
+      "api.service.nhs.uk/nhs-website-content/mental-health/",
   },
 ];
 
@@ -87,9 +73,4 @@ for (var i = 0; i < searchAndReplaceStrings.length; i++) {
   responseContent = responseContent.replace(regex, item.replaceWith);
 }
 
-responseContent = JSON.parse(responseContent);
-responseContent.requestUrl = requestUrl;
-responseContent.environmentSubdomain = environmentSubdomain;
-responseContent = JSON.stringify(responseContent);
-
 context.setVariable("response.content", responseContent);

proxies/sandbox/apiproxy/resources/jsc/SearchAndReplaceResponse.js

@@ -1,81 +1,67 @@
-// An example requestUrl would be https://internal-dev-sandbox.apis.ptl.api.platform.nhs.uk/nwca-48/conditions/
-var requestUrl = context.getVariable("request.url");
-var environmentSubdomain = requestUrl.split("/");
-environmentSubdomain = environmentSubdomain[2];
-environmentSubdomain = environmentSubdomain.split(".");
-environmentSubdomain = environmentSubdomain[0];
-
-var apiVersion2Host;
-if (
-  environmentSubdomain === "api" ||
-  environmentSubdomain === "apis" ||
-  environmentSubdomain === "prod"
-) {
-  apiVersion2Host = "api.service.nhs.uk";
-} else {
-  apiVersion2Host = environmentSubdomain + ".api.service.nhs.uk";
-}
+var requestHostnameEnv = context.getVariable("request_hostname_env");
 
 var searchAndReplaceStrings = [
   {
     searchFor: "www.nhs.uk/conditions/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/conditions/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/conditions/",
   },
   {
     searchFor: "www.nhs.uk/live-well/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/live-well/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/live-well/",
   },
   {
     searchFor: "www.nhs.uk/medicines/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/medicines/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/medicines/",
   },
   {
     searchFor: "www.nhs.uk/nhs-services/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/nhs-services/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/nhs-services/",
   },
   {
     searchFor: "www.nhs.uk/pregnancy/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/pregnancy/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/pregnancy/",
   },
   {
     searchFor: "www.nhs.uk/common-health-questions/",
     replaceWith:
-      apiVersion2Host + "/nhs-website-content/common-health-questions/",
+      requestHostnameEnv + "/nhs-website-content/common-health-questions/",
   },
   {
     searchFor: "www.nhs.uk/mental-health/",
     replaceWith:
-      apiVersion2Host + "api.service.nhs.uk/nhs-website-content/mental-health/",
+      requestHostnameEnv +
+      "api.service.nhs.uk/nhs-website-content/mental-health/",
   },
   {
     searchFor: "api.nhs.uk/conditions/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/conditions/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/conditions/",
   },
   {
     searchFor: "api.nhs.uk/live-well/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/live-well/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/live-well/",
   },
   {
     searchFor: "api.nhs.uk/medicines/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/medicines/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/medicines/",
   },
   {
     searchFor: "api.nhs.uk/nhs-services/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/nhs-services/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/nhs-services/",
   },
   {
     searchFor: "api.nhs.uk/pregnancy/",
-    replaceWith: apiVersion2Host + "/nhs-website-content/pregnancy/",
+    replaceWith: requestHostnameEnv + "/nhs-website-content/pregnancy/",
   },
   {
     searchFor: "api.nhs.uk/common-health-questions/",
     replaceWith:
-      apiVersion2Host + "/nhs-website-content/common-health-questions/",
+      requestHostnameEnv + "/nhs-website-content/common-health-questions/",
   },
   {
     searchFor: "api.nhs.uk/mental-health/",
     replaceWith:
-      apiVersion2Host + "api.service.nhs.uk/nhs-website-content/mental-health/",
+      requestHostnameEnv +
+      "api.service.nhs.uk/nhs-website-content/mental-health/",
   },
 ];
 
@@ -87,9 +73,4 @@ for (var i = 0; i < searchAndReplaceStrings.length; i++) {
   responseContent = responseContent.replace(regex, item.replaceWith);
 }
 
-responseContent = JSON.parse(responseContent);
-responseContent.requestUrl = requestUrl;
-responseContent.environmentSubdomain = environmentSubdomain;
-responseContent = JSON.stringify(responseContent);
-
 context.setVariable("response.content", responseContent);