(Tcl) GeoOp OAuth2 Authorisation Code Grant (Public App)

See more OAuth2 Examples

Note: This example requires Chilkat v10.1.2 or greater.

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load ./chilkat.dll

# It requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

set oauth2 [new_CkOAuth2]

# This should match the Site URL configured for your GeoOp (non-Server) Application, such as "http://localhost:3017/"
CkOAuth2_put_ListenPort $oauth2 3017

CkOAuth2_put_AuthorizationEndpoint $oauth2 "https://login.geoop.com/oauth2/code"
CkOAuth2_put_TokenEndpoint $oauth2 "https://login.geoop.com/oauth2/token"

# Replace the client ID with an actual value.
CkOAuth2_put_ClientId $oauth2 "GEOOP-APPLICATION-ID"
# The ClientSecret should remain empty for a GeoOp public application
CkOAuth2_put_ClientSecret $oauth2 ""

# We need a few special settings for GeoOp
CkOAuth2_put_Scope $oauth2 "default"
CkOAuth2_put_CodeChallenge $oauth2 0
# Setting LocalHost equal to "none" prevents the "redirect_uri" query param from being sent in the initial HTTP request.
# Note: The GeoOp Application should still have a redirect URL specified as "http://localhost:3017/", where the port
# number matches the ListenPort above.
CkOAuth2_put_LocalHost $oauth2 "none"

# Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
set url [CkOAuth2_startAuth $oauth2]
if {[CkOAuth2_get_LastMethodSuccess $oauth2] != 1} then {
    puts [CkOAuth2_lastErrorText $oauth2]
    delete_CkOAuth2 $oauth2
    exit
}

# Launch the default browser on the system and navigate to the url.
# The LaunchBrowser method was added in Chilkat v10.1.2.
set success [CkOAuth2_LaunchBrowser $oauth2 $url]
if {$success == 0} then {
    puts [CkOAuth2_lastErrorText $oauth2]
    delete_CkOAuth2 $oauth2
    exit
}

# Wait for the user to approve or deny authorization in the browser.
set numMsWaited 0
while {expr [$numMsWaited < 90000]  &&  [[CkOAuth2_get_AuthFlowState $oauth2] < 3]} {
    CkOAuth2_SleepMs $oauth2 100
    set numMsWaited [expr $numMsWaited + 100]
}

# If the browser does not respond within the specified time, AuthFlowState will be:
# 
# 1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
# 2: Waiting for Final Response – The thread is awaiting the final access token response.
# In either case, cancel the background task initiated by StartAuth.

if {[CkOAuth2_get_AuthFlowState $oauth2] < 3} then {
    CkOAuth2_Cancel $oauth2
    puts "No response from the browser!"
    delete_CkOAuth2 $oauth2
    exit
}

# Check AuthFlowState to determine if authorization was granted, denied, or failed:
# 
# 3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
# 4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
# 5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

if {[CkOAuth2_get_AuthFlowState $oauth2] == 5} then {
    puts "OAuth2 failed to complete."
    puts [CkOAuth2_failureInfo $oauth2]
    delete_CkOAuth2 $oauth2
    exit
}

if {[CkOAuth2_get_AuthFlowState $oauth2] == 4} then {
    puts "OAuth2 authorization was denied."
    puts [CkOAuth2_accessTokenResponse $oauth2]
    delete_CkOAuth2 $oauth2
    exit
}

if {[CkOAuth2_get_AuthFlowState $oauth2] != 3} then {
    puts "Unexpected AuthFlowState:[CkOAuth2_get_AuthFlowState $oauth2]"
    delete_CkOAuth2 $oauth2
    exit
}

puts "OAuth2 authorization granted!"
puts "Access Token = [CkOAuth2_accessToken $oauth2]"

# Save the entire JSON response, which includes the access token, for future calls.
# The JSON AccessTokenResponse looks like this:
# {"access_token":"e6dqdG....mzjpT04w==","token_type":"Bearer","expires_in":2592000,"owner_id":984236}

set fac [new_CkFileAccess]

CkFileAccess_WriteEntireTextFile $fac "qa_data/tokens/geoop.json" [CkOAuth2_accessTokenResponse $oauth2] "utf-8" 0

puts "Success."

delete_CkOAuth2 $oauth2
delete_CkFileAccess $fac