feat: add User-Agent request header

[zeke]

This is a way to resolve #14 that doesn't include user-specific data.

Trying to adhere to official User-Agent syntax:

User-Agent: <product> / <product-version> <comment>

Common format for web browsers:

User-Agent: Mozilla/<version> (<system-information>) <platform> (<platform-details>) <extensions>

The string should look something like

update-electron-app/1.1.0 (darwin: x64)

[MarshallOfSound]

This will only take affect on macOS, on windows their is no option to set headers

[juliangruber]

Actually, we should already know all this from their request url:

update.electron.org/electron/update-electron-app/darwin/1.1.0

Not sure if this is adding any info...

[zeke]

This will only take affect on macOS, on windows their is no option to set headers

So no Linux and no Windows. Dang.

we should already know all this from their request url:

True, URL does tell us the platform. But the version in the URL is the version of the app, whereas the version in the user agent is the version of the update-electron-app module that's making the request. I think it's also still useful because it will enable us to distinguish update-electron-app traffic from the rest.

[zeke]

@MarshallOfSound do you know if a query param will make it through intact?

[zeke]

This doesn't solve all our data collection goals, but it's a step. Gonna go ahead and ship it.

[zeke]

🎉 This PR is included in version 1.1.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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