Added a ‘AddTrailingSlashToRequestUri’ JavaScript policy (#125)

* Added a ‘AddTrailingSlashToRequestUri’ JavaScript policy

* Fixed case

* Renamed file so Git detects case change in filename

* And changinbg filename back to detect case change in filename

* Using var instead of let (EcmaScript 1.7)

Author: adrianparr

proxies/live/apiproxy/policies/javascript.AddTrailingSlashToRequestUri.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<Javascript async="false" continueOnError="false" enabled="true" timeLimit="200" name="javascript.AddTrailingSlashToRequestUri">
+    <DisplayName>javascript.AddTrailingSlashToRequestUri</DisplayName>
+    <Properties/>
+    <ResourceURL>jsc://AddTrailingSlashToRequestUri.js</ResourceURL>
+</Javascript>

proxies/live/apiproxy/proxies/default.xml

@@ -52,6 +52,16 @@
         </Step>
       </Request>
     </Flow>
+    <Flow name="AddTrailingSlashToRequestUri">
+      <Description/>
+      <Request>
+        <Step>
+          <Name>javascript.AddTrailingSlashToRequestUri</Name>
+        </Step>
+      </Request>
+      <Response/>
+      <Condition/>
+    </Flow>
   </Flows>
   <PostClientFlow name="PostClientFlow">
     <Response>

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

@@ -0,0 +1,15 @@
+function fixUrl(url) {
+  if (url !== null && url.length > 0) {
+    var parts = url.split("?");
+    if (parts[0].charAt(parts[0].length - 1) !== "/") {
+      parts[0] = parts[0] + "/";
+    }
+    return parts.join("?");
+  } else {
+    return url;
+  }
+}
+
+var originalUri = context.getVariable("request.uri");
+var modifiedUri = fixUrl(originalUri);
+context.setVariable("request.uri", modifiedUri);