electron-builder: Cannot parse blockmap when auto updating

Electron Builder Version: 22.4.0
Electron Updater Version: 4.2.4
Target: NSIS

My app is updating from a private github repo and when the update check starts it never downloads differentially because of the following error. Cannot download differentially, fallback to full download: Error: Cannot parse blockmap "https://api.github.com/repos/VitruxPT/w-assistant/releases/assets/18470277.blockmap", error: incorrect header check, raw data:...

The publish command always works fine and all the files (exe, blockmap, latest.yml) are being sent to the repo sucessfully so I’m not sure if this is on my end.

This is how my main.log looks like:

Thanks in advance

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 27
Comments: 33 (6 by maintainers)

Most upvoted comments

I made a PR to fix this issue.

To fix it immediately on your release computer do the following

Open node_modules/electron-updater/out/NsisUpdater.js
Goto line number 272 and replace the line with the following

 return JSON.parse((0, _zlib().gunzipSync)(data).toString());

+14

sandeep1995 on Jun 2, 2020

@VitruxPT @Jarinha99 @subh261096 @shellcodesniper @dnorth @StebneRuslan PR https://github.com/electron-userland/electron-builder/pull/5025 Guys, can you try commenting on my PR so that it gets merged quickly?

+10

sandeep1995 on Jun 10, 2020

I am facing the same exact issue while auto-updating but after some time the update occurs but full download is done not differential.

subh261096 on Mar 17, 2020

Hello, we have the same issues even with the PR

marf on Jul 8, 2021

Hello, we have the same issues even with the PR

Same here! Electron builder: 22.11.7 Electron: 12.0.10 Electron-updater: 4.3.4

Jay031 on Jul 28, 2021

Another(?) Solve

WIthout using CMD to execute,then it works…

shellcodesniper on May 30, 2020

Seeing the same problem! Download still happening but no differential. Uploading to S3:

    "electron-updater": "^4.3.1",
    "electron": "^8.2.4",
    "electron-builder": "^22.6.1"

dnorth on May 27, 2020

same HERE …!

shellcodesniper on May 26, 2020

Same here, differential never work because of this issue.

JonathRocha on May 13, 2020

Same error with “electron”: “^8.2.2”, “electron-builder”: “^22.5.1”, “electron-updater”: “^4.3.1”

and a public repo

razvanstatescu on Apr 28, 2020