https://github.com/shaka-project/eme_logger

Logs Encrypted Media Extension (EME) events and calls to help investigate issues in premium media sites.
https://github.com/shaka-project/eme_logger

chrome-extension drm encrypted-media encrypted-media-extensions widevine widevine-drm

Last synced: about 1 year ago
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Logs Encrypted Media Extension (EME) events and calls to help investigate issues in premium media sites.

• Host: GitHub
• URL: https://github.com/shaka-project/eme_logger
• Owner: shaka-project
• License: apache-2.0
• Created: 2015-09-16T23:18:41.000Z (over 10 years ago)
• Default Branch: main
• Last Pushed: 2025-02-26T22:27:44.000Z (over 1 year ago)
• Last Synced: 2025-03-29T06:05:04.933Z (about 1 year ago)
• Topics: chrome-extension, drm, encrypted-media, encrypted-media-extensions, widevine, widevine-drm
• Language: JavaScript
• Homepage: https://chrome.google.com/webstore/detail/eme-call-and-event-logger/cniohcjecdcdhgmlofniddfoeokbpbpb
• Size: 420 KB
• Stars: 111
• Watchers: 10
• Forks: 24
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md
  • Security: SECURITY.md

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README

          
# The EME Call and Event Logger Extension #

The EME Logger extension logs all Encrypted Media Extension (EME) calls and

Events. The log can be viewed in the javascript console, a separate browser page

or a downloaded file.

[EME Specification](https://w3c.github.io/encrypted-media/)

Just want to try it out? Install the EME Logger from [Chrome Web Store](https://chrome.google.com/webstore/detail/eme-call-and-event-logger/cniohcjecdcdhgmlofniddfoeokbpbpb).

## EME Formatters ##

Formatters can be used with the EME Logger extension. Formatters are separate

extensions that provide a class for key-system-specific custom formatting of

data from the calls and events.  Formatters should return objects with rich data

so that the EME Logger extension can incorporate them into its own formatting.

For backward compatibility with the v2 extension's format, they can also return

strings.

To register a message formatter:

  1. Write a class that implements the formatting methods below.

  2. Append an instance of the class to document.emeFormatters.

For example:

```js

class SomeFormatter {

  // Return objects with rich data (preferred), or a string with a pre-formatted

  // summary of the contents.  Throw an exception if the data is not formatted

  // correctly for your key system.

  formatInitData(initDataType, initData) {

    return MyParser.parseInitDataIntoObject(initDataType, initData);

  }

  formatRequest(request) {

    return MyParser.parseRequestIntoObject(request);

  }

  formatResponse(response) {

    return MyParser.parseResponseIntoObject(response);

  }

  formatServerCertificate(certificate) {

    return MyParser.parseCertificateIntoObject(certificate);

  }

}

if (!document.emeFormatters)

  document.emeFormatters = [];

document.emeFormatters.push(new SomeFormatter);

```