(Tcl) Salesforce OAuth2 Refresh Access Token

See more OAuth2 Examples

Note: Use Chilkat v10.1.2 or later for this example.

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load ./chilkat.dll

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

# It is assumed we previously obtained an OAuth2 access token.
# This example loads the JSON access token file 
# saved by this example: Get SalesForce OAuth2 Access Token via Authorization Flow

set jsonToken [new_CkJsonObject]

set success [CkJsonObject_LoadFile $jsonToken "qa_data/tokens/_salesforce.json"]
if {$success != 1} then {
    puts "Failed to load _salesforce.json"
    delete_CkJsonObject $jsonToken
    exit
}

# This is an example of a Salesforce OAuth2 access token to be refreshed:

# {
#   "access_token": "00D41000....uLZBpT6",
#   "refresh_token": "5Aep....25xdGgkrV",
#   "signature": "cjTbSc5DvcKpaMoRTzuQTJLb1tcMw8LEO01flq4aMD4=",
#   "scope": "refresh_token id",
#   "instance_url": "https://d41000000f8a0eak-dev-ed.my.salesforce.com",
#   "id": "https://login.salesforce.com/id/00D41000000F8A0EAK/005410000....xAAE",
#   "token_type": "Bearer",
#   "issued_at": "1738348388166"
# }

set oauth2 [new_CkOAuth2]

CkOAuth2_put_TokenEndpoint $oauth2 "https://login.salesforce.com/services/oauth2/token"

# Replace this with your actual client ID (Consumer Key)
CkOAuth2_put_ClientId $oauth2 "CLIENT_ID"

# Note: The client secret is not required because we configured our Connected App
# to not require it for the refresh flow.  See the screenshot below.

# Get the "refresh_token"
CkOAuth2_put_RefreshToken $oauth2 [CkJsonObject_stringOf $jsonToken "refresh_token"]

# Send the HTTP POST to refresh the access token..
set success [CkOAuth2_RefreshAccessToken $oauth2]
if {$success != 1} then {
    puts [CkOAuth2_lastErrorText $oauth2]
    delete_CkJsonObject $jsonToken
    delete_CkOAuth2 $oauth2
    exit
}

# The response contains a new access token, but we must keep
# our existing refresh token for when we need to refresh again in the future.
CkJsonObject_UpdateString $jsonToken "access_token" [CkOAuth2_accessToken $oauth2]

# Save the new JSON access token response to a file.
set sbJson [new_CkStringBuilder]

CkJsonObject_put_EmitCompact $jsonToken 0
CkJsonObject_EmitSb $jsonToken $sbJson
CkStringBuilder_WriteFile $sbJson "qa_data/tokens/_salesforce.json" "utf-8" 0

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

# --------------------------------------------------------------------------
# Here's a screenshot of a Salesforce Connected App 
# which does not requires the secret for the authorization or refresh flow.
# 

delete_CkJsonObject $jsonToken
delete_CkOAuth2 $oauth2
delete_CkStringBuilder $sbJson