Merge pull request #773 from 0xPolygon/udpate-wrangler-pattern-deployment

fix(NO-JIRA): fix to handle options request and root access

Author: sshrihar

.gitignore

@@ -1,3 +1,5 @@
 node_modules/
 build/
 .DS_STORE
+.wrangler/
+src/wrangler_main.js

package.json

@@ -6,7 +6,7 @@
     "scripts": {
         "test": "mocha 'tests/tokenAddition'",
         "test-all": "mocha 'tests'",
-        "build": "rimraf build && mkdir -p build/tokenlists && node src/write.js",
+        "build": "rimraf build && mkdir -p build/tokenlists && node src/write.js && node src/generateWorker.js",
         "lint": "eslint \"./src/*\"",
         "lint:fix": "eslint --fix \"./src/*\"",
         "lint-tests:fix": "eslint --fix \"./tests/*\""

src/generateWorker.js

@@ -0,0 +1,94 @@
+const fs = require("fs");
+const path = require("path");
+
+function generateWorkerCode() {
+    const buildDir = path.join(__dirname, "../build");
+    const tokenListsDir = path.join(buildDir, "tokenlists");
+    
+    // Get all JSON files in the tokenlists directory
+    const tokenListFiles = fs.readdirSync(tokenListsDir)
+        .filter(file => file.endsWith(".json"))
+        .sort(); // Sort for consistent ordering
+    
+    // Generate import statements
+    const imports = [
+        "import listRegistry from \"../build/listRegistry.json\";"
+    ];
+    
+    const variableNames = [];
+    
+    tokenListFiles.forEach((file, index) => {
+        const baseName = file.replace(".json", "");
+        const variableName = `tokenList${index}`;
+        variableNames.push({ variableName, file, baseName });
+        imports.push(`import ${variableName} from "../build/tokenlists/${file}";`);
+    });
+    
+    // Generate file map
+    const fileMapEntries = [
+        "    \"/\": listRegistry,",
+        "    \"/listRegistry.json\": listRegistry,"
+    ];
+    
+    variableNames.forEach(({ variableName, file }) => {
+        fileMapEntries.push(`    "/tokenlists/${file}": ${variableName},`);
+    });
+    
+    // Generate the complete worker code
+    const workerCode = `${imports.join("\n")}
+
+const corsHeaders = {
+    "Access-Control-Allow-Origin": "*",
+    "Access-Control-Allow-Methods": "GET, HEAD, POST, OPTIONS",
+    "Access-Control-Allow-Headers": "Content-Type, X-Requested-With",
+};
+
+// Auto-generated file mapping based on build directory contents
+const fileMap = {
+${fileMapEntries.join("\n")}
+};
+
+export default {
+    async fetch(request, env, ctx) {
+        const url = new URL(request.url);
+
+        // Handle OPTIONS requests for ALL paths
+        if (request.method === "OPTIONS") {
+            return new Response(null, { 
+                status: 204,
+                headers: corsHeaders 
+            });
+        }
+
+        // Look up the file in our auto-generated map
+        const fileData = fileMap[url.pathname];
+        if (fileData) {
+            const json = JSON.stringify(fileData, null, 2);
+            return new Response(json, {
+                headers: {
+                    "content-type": "application/json;charset=UTF-8",
+                    ...corsHeaders,
+                },
+            });
+        }
+
+        // File not found
+        return new Response("Not Found", { status: 404 });
+    },
+};
+`;
+
+    // Write the generated worker code
+    const outputPath = path.join(__dirname, "wrangler_main.js");
+    fs.writeFileSync(outputPath, workerCode);
+    
+    console.log("✅ Generated wrangler_main.js with the following files:");
+    console.log("   - / → listRegistry.json");
+    console.log("   - /listRegistry.json → listRegistry.json");
+    variableNames.forEach(({ file }) => {
+        console.log(`   - /tokenlists/${file} → tokenlists/${file}`);
+    });
+}
+
+// Run the generator
+generateWorkerCode();

src/index.js

@@ -1,13 +1,11 @@
 name = "polygon-token-list"
+main = "src/wrangler_main.js"
 compatibility_date = "2024-12-30"
 placement = { mode = "smart" }
 preview_urls = false
 send_metrics = false
 workers_dev = false
 
-[assets]
-directory = "build"
-
 [env.staging]
 routes = [
     { pattern = "api-polygon-tokens.staging.polygon.technology", custom_domain = true },