---
title: Deno Deploy
pagination_prev: demos/local/index
pagination_next: demos/extensions/index
---

import current from '/version.js';
import CodeBlock from '@theme/CodeBlock';

Deno Deploy offers "Serverless Functions" powered by Deno.

The [Deno installation](/docs/getting-started/installation/deno) instructions
apply to Deno Deploy scripts.

:::warning pass

Deno Deploy does not offer any sort of temporary file access in functions.

This breaks web frameworks that use the filesystem in body parsing.

:::

:::caution

When the demo was last tested, Deno Deploy required a GitHub account.

:::

## Supported Frameworks

When the demo was last tested, the `drash` server framework used an in-memory
approach for parsing POST request bodies.

### Parsing Data

When files are submitted via HTTP POST, the `bodyParam` method can fetch data.
The `content` property of the returned object can be parsed with `XLSX.read`.

The following example assumes the file is submitted at field name `file`:

<CodeBlock language="ts">{`\
// @deno-types="https://cdn.sheetjs.com/xlsx-${current}/package/types/index.d.ts"
import { read, utils } from 'https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs';
import * as Drash from "https://cdn.jsdelivr.net/gh/drashland/drash@v2.8.0/mod.ts";
\n\
class SheetJSResource extends Drash.Resource {
  public paths = ["/"];
\n\
  public POST(request: Drash.Request, response: Drash.Response) {
    // highlight-start
    /* get data from body */
    const file = request.bodyParam<Drash.Types.BodyFile>("file");
    /* parse */
    var wb = read(file.content, {type: "buffer", dense: true});
    // highlight-end
    /* generate HTML from first worksheet */
    return response.html(utils.sheet_to_html(wb.Sheets[wb.SheetNames[0]]));
  }
}`}
</CodeBlock>

## Demo

:::note

This demo was last tested on 2023 June 05. The service <https://s2c.sheetjs.com>
was implemented using this exact sequence.

:::

1) Register and Sign in.

2) Click "New Project" to create a new Project. In the next screen, look for the
"Hello World" sample and click the corresponding "Fork" button.

3) Download [`s2c.ts`](pathname:///deno/s2c.ts).  Open with a text editor and
copy the contents into the playground editor (left pane).

4) Click "Save and Deploy".

### Testing

5) Download the test file <https://sheetjs.com/pres.xlsx>

6) In the browser window, click "Choose File" and select the downloaded file.
Click "Submit" and the page will show the contents in a HTML TABLE.

7) Click the "Fullscreen" icon in the top-right corner of the page window.

8) Open a terminal window and download <https://sheetjs.com/pres.numbers>:

```bash
curl -LO https://sheetjs.com/pres.numbers
```

9) Copy the first `curl` line from the page and run in the terminal. For
example, if the deployment is `clean-badger-69`, the command would be

```bash
curl -X POST -F"file=@pres.numbers" https://clean-badger-69.deno.dev/
```

The output will be an HTML table

10) Copy the second `curl` line from the page and run in the terminal. For
example, if the deployment is `clean-badger-69`, the command would be

```bash
curl -X POST -F"file=@pres.numbers" -F"type=csv" https://clean-badger-69.deno.dev/
```

The output will be CSV.