RQLY-1042 feat: map local for redirect rule (#15)

Author: nsrCodes

src/components/proxy-middleware/rule_action_processor/handle_mixed_response.js

@@ -1,5 +1,6 @@
 const axios = require("axios");
 const parser = require("ua-parser-js");
+import fs from "fs";
 import * as Sentry from "@sentry/browser";
 
 const handleMixedResponse = async (ctx, destinationUrl) => {
@@ -42,6 +43,34 @@ const handleMixedResponse = async (ctx, destinationUrl) => {
       }
     }
   }
+
+  if(destinationUrl?.startsWith("file://")) {
+    const path = destinationUrl.slice(7)
+    try {
+      // utf-8 is common assumption, but this introduces edge cases
+      const data = fs.readFileSync(path, "utf-8"); 
+      return {
+        status: true,
+        response_data: {
+          headers: { "Cache-Control": "no-cache" },
+          status_code: 200,
+          body: data,
+        },
+      };
+    } catch (err) {
+      Sentry.captureException(err);
+      // log for live debugging
+      console.log("error in openning local file", err)
+        return {
+          status: true,
+          response_data: {
+            headers: { "Cache-Control": "no-cache" },
+            status_code: 502,
+            body: err?.message,
+          },
+        };
+    }
+  }
   return { status: false };
 };
 

src/components/proxy-middleware/rule_action_processor/processors/redirect_processor.js

@@ -9,7 +9,6 @@ import {
   build_action_processor_response,
   build_post_process_data,
 } from "../utils";
-const { URL } = require("url");
 
 // adding util to get origin header for handling cors
 const getRequestOrigin = (ctx) => {