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https://github.com/oven-sh/bun
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49 lines
1.2 KiB
Markdown
49 lines
1.2 KiB
Markdown
---
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name: Stream a file as an HTTP Response
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---
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This snippet reads a file from disk using [`Bun.file()`](https://bun.sh/docs/api/file-io#reading-files-bun-file). This returns a `BunFile` instance, which can be passed directly into the `new Response` constructor.
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```ts
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const path = "/path/to/file.txt";
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const file = Bun.file(path);
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const resp = new Response(file);
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```
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---
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The `Content-Type` is read from the file and automatically set on the `Response`.
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```ts
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new Response(Bun.file("./package.json")).headers.get("Content-Type");
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// => application/json;charset=utf-8
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new Response(Bun.file("./test.txt")).headers.get("Content-Type");
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// => text/plain;charset=utf-8
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new Response(Bun.file("./index.tsx")).headers.get("Content-Type");
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// => text/javascript;charset=utf-8
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new Response(Bun.file("./img.png")).headers.get("Content-Type");
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// => image/png
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```
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---
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Putting it all together with [`Bun.serve()`](https://bun.sh/docs/api/http#bun-serve).
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```ts
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// static file server
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Bun.serve({
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async fetch(req) {
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const path = new URL(req.url).pathname;
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const file = Bun.file(path);
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return new Response(file);
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},
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});
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```
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---
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See [Docs > API > File I/O](https://bun.sh/docs/api/file-io#writing-files-bun-write) for complete documentation of `Bun.write()`.
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