Add blockstack: protocol handler to Linux

[larrysalibra]

For Ubuntu, to create a blockstack: handler, create the following file:

/usr/share/applications/blockstack.desktop

With the following contents:

[Desktop Entry]
Name=Blockstack
Exec=blockstack.sh %u
Type=Application
NoDisplay=true
Categories=System;
MimeType=x-scheme-handler/blockstack;

We'll need to point the Exec= to a script that opens the user's default browser with the Portal's authentication path.

[jcnelson]

You can find the default browser with xdg-mime query default text/html. This can be fed into the Exec= string. You can use a .desktop launcher like gtk-launch, or you can grab the command directly from the .desktop file with the following:

$ cat "/usr/share/applications/$(xdg-mime query default text/html)" | grep "Exec=" | sed -r 's/Exec=([^ ]+) .*/\1/g' | xargs sh -c -

[jcnelson]

I've gotten this to work on Linux.

My blockstack.sh:

#!/bin/sh

PORTAL_URL="http://localhost:3000"

# logging...
echo "request: $@" >> /tmp/blockstack.log

# expect blockstack:AUTHENTICATION_TOKEN
if [ -z "$1" ]; then 
   exit 1
fi

AUTH_TOKEN="$(echo "$1" | sed -r 's/blockstack://g')"
exec chromium-browser "$PORTAL_URL/auth?authRequest=$AUTH_TOKEN"

My .desktop file (in ~/.local/share/applications/blockstack.desktop):

[Desktop Entry]
Name=Blockstack
Exec=blockstack.sh %u
Type=Application
NoDisplay=true
Categories=System;
MimeType=x-scheme-handler/blockstack;

[jackzampolin]

This is implemented in the launcher https://github.com/blockstack/packaging/blob/master/browser-core-docker/launcher#L201