local: add content-type header

src/lib/local/cdp.js

@@ -1,6 +1,7 @@
 import { basename, dirname, extname, join } from 'path';
 import { readFile } from 'fs/promises';
 import { log } from '../logger.js';
+import mimeType from '../mimeType.js';
 
 const generatePath = (pathname, indexFile) => {
   if (pathname === '/') return indexFile;
@@ -19,17 +20,29 @@ export default async (CDP, { sessionId, url: givenPath, localUrl }) => {
 
       const url = new URL(request.url);
       const path = join(basePath, generatePath(url.pathname, indexFile));
+      const ext = extname(path).slice(1);
 
       let error = false;
 
       const body = await readFile(path, 'utf8').catch(() => false);
       if (!body) error = 404;
 
+      if (error) return await CDP.sendMessage('Fetch.fulfillRequest', {
+        requestId,
+        responseCode: error,
+        body: Buffer.from('').toString('base64') // CDP uses base64 encoding for request body
+      });
+
       return await CDP.sendMessage('Fetch.fulfillRequest', {
         requestId,
-        responseCode: error || 200,
+        responseCode: 200,
-        body: Buffer.from(error ? '' : body).toString('base64'), // CDP uses base64 encoding for request body
+        body: Buffer.from(body).toString('base64'), // CDP uses base64 encoding for request body
-        // need to add our own headers or not?
+        responseHeaders: [
+          {
+            name: 'Content-Type',
+            value: mimeType(ext)
+          }
+        ]
       });
     }
   });

src/lib/local/server.js

@@ -2,6 +2,7 @@ import { basename, dirname, extname, join } from 'path';
 import { readFile } from 'fs/promises';
 import { createServer } from 'http';
 import { log } from '../logger.js';
+import mimeType from '../mimeType.js';
 
 const generatePath = (pathname, indexFile) => {
   if (pathname === '/') return indexFile;
@@ -18,23 +19,20 @@ export default async ({ url: givenPath, localUrl }) => {
   const server = createServer(async (req, res) => {
     const url = new URL(`http://localhost:${port}` + decodeURI(req.url));
     const path = join(basePath, generatePath(url.pathname, indexFile));
-
+    const ext = extname(path).slice(1);
-    console.log('SERVER', url, path);
 
     let error = false;
 
     const body = await readFile(path, 'utf8').catch(() => false);
     if (!body) error = 404;
 
-    console.log('SERVER', error);
-
     if (error) {
       res.writeHead(error);
       return res.end();
     }
 
     res.writeHead(200, {
-
+      'Content-Type': mimeType(ext)
     });
 
     res.end(body, 'utf8');