https://github.com/mailmojo/screenie-server

A Node server with a pool of Puppeteer (Chrome headless) instances for scalable screenshot generation.
https://github.com/mailmojo/screenie-server

chrome-headless javascript node nodejs puppeteer screenshot

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A Node server with a pool of Puppeteer (Chrome headless) instances for scalable screenshot generation.

• Host: GitHub
• URL: https://github.com/mailmojo/screenie-server
• Owner: mailmojo
• License: mit
• Created: 2017-02-03T15:18:04.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2022-06-25T20:58:53.000Z (about 2 years ago)
• Last Synced: 2024-04-28T03:25:38.067Z (5 months ago)
• Topics: chrome-headless, javascript, node, nodejs, puppeteer, screenshot
• Language: JavaScript
• Homepage:
• Size: 120 KB
• Stars: 20
• Watchers: 6
• Forks: 10
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGES.md
  • License: LICENSE

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README

        
# screenie-server

HTTP screenshot service based on [Puppeteer](https://github.com/GoogleChrome/puppeteer).

Creates a HTTP server using [Koa](https://github.com/koajs/koa), by default on

port 3000. It renders pages and creates screenshots of them on request.

## Installation / Usage

You can install from npm and run the server manually:

```bash

npm install screenie-server

./node_modules/.bin/screenie-server

```

Alternatively, we provide a Docker image (built from the

[Dockerfile](Dockerfile)) at [eliksir/screenie-server](https://hub.docker.com/r/eliksir/screenie-server/).

This container is not running in sandbox mode because the Docker image doesn't

support user namespaces.

## Configuration

Then request a screenshot of an URL using the `url` query parameter:

`http://localhost:3000/?url=http://google.com/&format=jpeg`

The size of the screenshot can be customized through the `width` and `height`

query parameters, but will always be constrained within 2048x2048. The default

size used when the parameters are missing can be customized by environment

variables:

* `SCREENIE_WIDTH`: Default width, as integer, in pixels (default `1024`).

* `SCREENIE_HEIGHT`: Default height, as integer, in pixels (default `768`).

The `format` query parameter can be used to request a specific format of the

screenshot. The supported formats are PNG, JPEG and even PDF. You can

also set the default format through an environment variable:

* `SCREENIE_DEFAULT_FORMAT`: Default format (default `jpeg`).

The Puppeteer pool can also be customized with environment variables:

* `SCREENIE_POOL_MIN`: Minimum number of Puppeteer instances (default `2`).

* `SCREENIE_POOL_MAX`: Maximum number of Puppeteer instances (default `10`).

To control the level of logging that will be performed, customize the

`SCREENIE_LOG_LEVEL` environment variable. Supported values are `error`,

`warn`, `info`, `verbose`, `debug`, and `silly`, though only `info` and

`verbose` are currently in use.

* `SCREENIE_LOG_LEVEL`: Logging level (default `info`).

To open up file scheme in URL parameter:

* `SCREENIE_ALLOW_FILE_SCHEME`: true (default `false`).

Delay from the `load` event until the screenshot is taken. This can solve

issues with rendering (i.e. rendering webfonts) not being complete before the

screenshot.

* `SCREENIE_SCREENSHOT_DELAY`: Time in milliseconds (default `50`).

And lastly, of course the HTTP port can be customized:

* `SCREENIE_PORT`: HTTP port (default `3000`).

## Contributing

We are open to contributions or suggestions. File issues or suggestions on the

[GitHub issues page](https://github.com/eliksir/screenie-server/issues), and

please do submit a pull request if you have the time to implement an

improvement or bugfix.

## License

Published under the MIT license.