In my corporate environment, we are working behind a firewall that returns "nice" HTML webpages with detailed error instructions instead of a plain "connection refused" error in situations of invalid PROXY settings.
We have experienced several times that Jenkins servers with improper PROXY settings will download jpi-files for plugin updates containing just "error HTML webpage" content. Jenkins doesn't seem to detect this, and instead tries to install the corrupted plugin. What then happens is that the plugin upgrade fails, and the plugin gets _uninstalled_ altogether. Any job-configuration related to the accidentally uninstalled plugin then also seems to be removed, which is pretty serious. Would it be possible to add some sort of integrity-verification to downloaded jpi-files prior to install them, so that we avoid accidentally uninstalling plugins? Thanks in advance, Fredrik Orderud
