feat: add message attachments (wip)

server/api/files/[...key].get.ts

@@ -0,0 +1,42 @@
+import { S3Client, GetObjectCommand } from "@aws-sdk/client-s3";
+
+export default defineEventHandler(async (event) => {
+    const key = getRouterParam(event, 'key');
+    if (!key) {
+        throw createError({ statusCode: 400, statusMessage: 'Missing file key' });
+    }
+
+    const config = useRuntimeConfig();
+
+    const s3 = new S3Client({
+        region: config.s3.region || 'us-east-1',
+        endpoint: config.s3.endpoint!,
+        credentials: {
+            accessKeyId: config.s3.accessKeyId!,
+            secretAccessKey: config.s3.secret!,
+        },
+        forcePathStyle: true,
+    });
+
+    try {
+        const response = await s3.send(new GetObjectCommand({
+            Bucket: config.s3.bucket!,
+            Key: key,
+        }));
+
+        // 3. Set the correct headers so the browser knows what it's receiving
+        setHeaders(event, {
+            'Content-Type': response.ContentType || 'application/octet-stream',
+            'Content-Length': response.ContentLength?.toString() || '',
+            'Cache-Control': 'public, max-age=3600', // Optional: cache for 1 hour
+        });
+
+        // 4. Return the body as a stream directly to the client
+        return response.Body;
+    } catch (error: any) {
+        if (error.name === 'NoSuchKey') {
+            throw createError({ statusCode: 404, statusMessage: 'File not found' });
+        }
+        throw createError({ statusCode: 500, statusMessage: 'Error fetching file' });
+    }
+});