Nsis Updater - Custom Headers Not Sent when Downloading Blockmap

[neilrees]

• Electron-Updater: 4.0.4
• Target: Windows 10 x64
• Updater: Nsis

When setting custom headers using autoUpdater.requestHeaders the custom headers are not sent on the request to download the blockmap file.

https://github.com/electron-userland/electron-builder/blob/master/packages/electron-updater/src/NsisUpdater.ts#L146 the requestHeaders parameter is not used for the blockmap download.

The downloadUpdateOptions object has a property named requestHeader whereas httpExecutor expects a property named headers.

In our scenario we are setting an Authorization header and are seeing it fall back to doing a full download every time as it is not able to download the blockmap from our update server without providing that header.