bulk-export run data from Garmin Connect

disconnect.rb

#!/usr/bin/env ruby

## disconnect

#     ./disconnect.rb -u yourusername
#
# This is a command-line utility for the bulk-downloading of run data from
# the connect.garmin.com web application, which has lackluster export
# capabilities.
#
# Using this code is a matter of your own relationship with Garmin Connect
# and their TOS. I can't imagine this being very destructive to their service,
# and it's just filling in a hole in their existing service.
#
# It's built against Garmin Connect as of July 22, 2011. It's a scraper:
# thus if Garmin changes, this **will break**.
#
# This script requires all of the utilities on the line below: install them
# with rubygems
%w{rubygems json fileutils mechanize choice highline/import}.map{|x| require x}

LOGIN_PAGE = "https://connect.garmin.com/signin"
ACTIVITIES_SEARCH = "http://connect.garmin.com/proxy/activity-search-service-1.0/json/activities?_dc=1220170621856&start=0&limit=1000"
GPX_EXPORT = "http://connect.garmin.com/proxy/activity-service-1.1/gpx/activity/%d?full=true"
KML_EXPORT = "http://connect.garmin.com/proxy/activity-service-1.0/kml/activity/%d?full=true"
TCX_EXPORT = "http://connect.garmin.com/proxy/activity-service-1.0/tcx/activity/%d?full=true"

Choice.options do
    header ''
    header 'Specific options:'

    option :user, :required => true do
        short '-u'
        long '--user=USER'
        desc 'connect.garmin.com username. Required'
    end

    option :dir do
        short '-o'
        long '--output-dir=OUTPUT'
        desc 'the directory to save .tcx files'
        default 'tcx'
    end
end

password = ask("Enter your password: " ) { |q| q.echo = "*" }

def login(agent, user, password)
    page = agent.get(LOGIN_PAGE)
    login_form = page.form('login')
    login_form['login:loginUsernameField'] = user
    login_form['login:password'] = password

    page = agent.submit(login_form, login_form.buttons.first)
    raise "Login incorrect!" if page.title().match('Sign In')
    page
end

def download_run(agent, id)
    print "."
    # This downloads TCX files: you can swap out the constant, or add
    # more lines that download the different kinds of exports. I prefer TCX,
    # because despite being a 'private standard,' it includes all data,
    # including heart rate data.
    agent.get(TCX_EXPORT % (id).to_i).save_as(File.join(Choice[:dir], "%d.tcx" % id))
end

def activities(agent)
    j = agent.get(ACTIVITIES_SEARCH)
    search = JSON.parse(j.content)
    runs = search['results']['activities'].map {|r|
        # Get each activity id to insert into the download URL
        r['activity']['activityId']
    }.map {|id|
        # Download a run.
        download_run(agent, id)
    }
end

agent = Mechanize.new

# One needs to log in to get access to private runs. Mechanize will store
# the session data for the API call that cames next.
home_page = login(agent, Choice[:user], password)

FileUtils.mkdir_p(Choice[:dir]) if not File.directory?(Choice[:dir])

puts "Downloading runs..."

activities(agent)

Yes, thanks a lot for sharing. I also experienced the 400 => Net::HTTPBadRequest problem. Instead of limiting ACTIVITIES_SEARCH to 100, I limited it to 1 and changed the activities function to look like the following:
def activities(agent)
$activityIdx = 0
$numActivities = 624
while $activityIdx <= $numActivities do
puts("Downloading activity = #$activityIdx")
as = ACTIVITIES_SEARCH % $activityIdx
print "\tas: ", as, "\n"
j = agent.get(as)
search = JSON.parse(j.content)
runs = search['results']['activities'].map {|r|
# Get each activity id to insert into the download URL
r['activity']['activityId']
}.map {|id|
# Download an activity.
download_run(agent, id)
}
$activityIdx += 1
end
end

In my case I wanted all of my history, 624.

Thanks a lot for sharing @tmcw!

Garmin Connect UI has changed and this script no longer works for me.

If you're interested in a Python solution, I have one that does pretty much the same thing (in fact, this script was inspiration for it) and also contains a fix for the new Garmin Connect UI (basically just needs a redirect after login):

https://github.com/magsol/garmin/blob/master/download.py