feat: multi-track file upload support (native images, code/text block formatting, and workspace binary uploads)

lib/index.js

@@ -1,3 +1,6 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
 export const name = 'dsh-plugin-model-enhancer';
 export const inject = ['webServer'];
 
@@ -33,12 +36,12 @@ async function getModelsDevData() {
 }
 
 export function apply(ctx) {
+  // 1. Models.dev Cache Proxy
   ctx.effect(() => {
     return ctx.webServer.register({
       kind: 'exact',
       path: '/api/models-dev/models',
       handler: async (req, res) => {
-        // Add CORS headers so web client can always reach it seamlessly
         res.setHeader('Access-Control-Allow-Origin', '*');
         res.setHeader('Access-Control-Allow-Methods', 'GET, OPTIONS');
         res.setHeader('Access-Control-Allow-Headers', 'Content-Type');
@@ -70,4 +73,69 @@ export function apply(ctx) {
       }
     });
   }, 'dsh-plugin-model-enhancer: webServer proxy route');
+
+  // 2. Binary / Large Document File Upload to Workspace Endpoint
+  ctx.effect(() => {
+    return ctx.webServer.register({
+      kind: 'exact',
+      path: '/api/model-enhancer/upload',
+      handler: async (req, res) => {
+        res.setHeader('Access-Control-Allow-Origin', '*');
+        res.setHeader('Access-Control-Allow-Methods', 'POST, OPTIONS');
+        res.setHeader('Access-Control-Allow-Headers', 'Content-Type, X-Filename');
+
+        if (req.method === 'OPTIONS') {
+          res.writeHead(204);
+          res.end();
+          return;
+        }
+
+        if (req.method !== 'POST') {
+          res.writeHead(405, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({ error: 'Method Not Allowed' }));
+          return;
+        }
+
+        try {
+          const urlObj = new URL(req.url, 'http://127.0.0.1');
+          const rawName = req.headers['x-filename'] || urlObj.searchParams.get('filename') || `upload_${Date.now()}.bin`;
+          const decodedName = decodeURIComponent(rawName);
+          const safeName = path.basename(decodedName);
+
+          const uploadDir = path.join(process.cwd(), 'uploads');
+          fs.mkdirSync(uploadDir, { recursive: true });
+
+          const targetPath = path.join(uploadDir, safeName);
+          const writeStream = fs.createWriteStream(targetPath);
+
+          let totalBytes = 0;
+          req.on('data', (chunk) => {
+            totalBytes += chunk.length;
+          });
+
+          req.pipe(writeStream);
+
+          writeStream.on('finish', () => {
+            res.writeHead(200, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({
+              ok: true,
+              filename: safeName,
+              path: path.join('uploads', safeName),
+              size: totalBytes
+            }));
+          });
+
+          writeStream.on('error', (err) => {
+            ctx.logger?.error?.('[model-enhancer] Upload stream error:', err);
+            res.writeHead(500, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({ error: err.message || 'File write error' }));
+          });
+        } catch (err) {
+          ctx.logger?.error?.('[model-enhancer] Upload handler error:', err);
+          res.writeHead(500, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({ error: err.message || 'Upload processing error' }));
+        }
+      }
+    });
+  }, 'dsh-plugin-model-enhancer: workspace file upload endpoint');
 }