Merge pull request #2010 from eamonnmcevoy/2009-add-response-to-streamable-file-example

docs(streaming-files): show how to set content-type and content-dispo…

Author: kamilmysliwiec

content/techniques/streaming-files.md

@@ -45,3 +45,25 @@ export class FileController {
   }
 }
 ```
+
+The default content type is `application/octet-stream`, if you need to customize the response you can use the `res.set` method.
+
+
+```ts
+import { Controller, Get, StreamableFile, Response } from '@nestjs/common';
+import { createReadStream } from 'fs';
+import { join } from 'path';
+
+@Controller('file')
+export class FileController {
+  @Get()
+  getFile(@Response({ passthrough: true }) res): StreamableFile {
+    const file = createReadStream(join(process.cwd(), 'package.json'));
+    res.set({
+      'Content-Type': 'application/json',
+      'Content-Disposition': 'attachment; filename="package.json"',
+    });
+    return new StreamableFile(file);
+  }
+}
+```