(Tcl) PayPal - Capture a Previously Authorized Payment

Captures a previously authorized payment.

Note: This example requires Chilkat v9.5.0.65 or greater.

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load ./chilkat.dll

# Note: Requires Chilkat v9.5.0.65 or greater.

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

# Load our previously obtained access token. (see PayPal OAuth2 Access Token)
set jsonToken [new_CkJsonObject]

CkJsonObject_LoadFile $jsonToken "qa_data/tokens/paypal.json"

# Build the Authorization request header field value.
set sbAuth [new_CkStringBuilder]

# token_type should be "Bearer"
CkStringBuilder_Append $sbAuth [CkJsonObject_stringOf $jsonToken "token_type"]
CkStringBuilder_Append $sbAuth " "
CkStringBuilder_Append $sbAuth [CkJsonObject_stringOf $jsonToken "access_token"]

# Make the initial connection.
# A single REST object, once connected, can be used for many PayPal REST API calls.
# The auto-reconnect indicates that if the already-established HTTPS connection is closed,
# then it will be automatically re-established as needed.
set rest [new_CkRest]

set bAutoReconnect 1
set success [CkRest_Connect $rest "api.sandbox.paypal.com" 443 1 $bAutoReconnect]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkJsonObject $jsonToken
    delete_CkStringBuilder $sbAuth
    delete_CkRest $rest
    exit
}

# ----------------------------------------------------------------------------------------------
# The code above this comment could be placed inside a function/subroutine within the application
# because the connection does not need to be made for every request.  Once the connection is made
# the app may send many requests..
# ----------------------------------------------------------------------------------------------

# Build the JSON containing the transaction information.
set json [new_CkJsonObject]

CkJsonObject_put_EmitCompact $json 0
CkJsonObject_UpdateString $json "amount.currency" "USD"
CkJsonObject_UpdateString $json "amount.total" "4.54"
CkJsonObject_UpdateBool $json "is_final_capture" 1
puts [CkJsonObject_emit $json]

# The JSON created by the above code:

# 	{ 
# 	  "amount": { 
# 	    "currency": "USD",
# 	    "total": "4.54"
# 	  },
# 	  "is_final_capture": true
# 	}

CkRest_AddHeader $rest "Authorization" [CkStringBuilder_getAsString $sbAuth]
CkRest_AddHeader $rest "Content-Type" "application/json"

# To capture payment, make a call to /v1/payments/authorization/[authorization_id]/capture with the authorization ID in the URI.
# See PayPal Authorize Payment for sample code to create the authorization.
# The "7X8332687A4929542" comes from the "transactions[0].related_resources[0].authorization.id" part of the authorization response.

set sbPath [new_CkStringBuilder]

CkStringBuilder_Append $sbPath "/v1/payments/authorization/[authorization_id]/capture"
set numReplacements [CkStringBuilder_Replace $sbPath "[authorization_id]" "7X8332687A4929542"]

# Send the POST request containign the JSON in the request body, and get the JSON response.
set sbJsonRequest [new_CkStringBuilder]

CkJsonObject_put_EmitCompact $json 1
CkJsonObject_EmitSb $json $sbJsonRequest
set sbJsonResponse [new_CkStringBuilder]

set success [CkRest_FullRequestSb $rest "POST" [CkStringBuilder_getAsString $sbPath] $sbJsonRequest $sbJsonResponse]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkJsonObject $jsonToken
    delete_CkStringBuilder $sbAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    delete_CkStringBuilder $sbPath
    delete_CkStringBuilder $sbJsonRequest
    delete_CkStringBuilder $sbJsonResponse
    exit
}

CkJsonObject_put_EmitCompact $json 0
CkJsonObject_LoadSb $json $sbJsonResponse

puts "Response Status Code = [CkRest_get_ResponseStatusCode $rest]"

# IMPORTANT: In most PayPal examples, the return status code is 201.
# For this particular call, PayPal returns status code 200.

# Did we get a 200 success response?
if {[CkRest_get_ResponseStatusCode $rest] != 200} then {
    puts [CkJsonObject_emit $json]
    puts "Failed."
    delete_CkJsonObject $jsonToken
    delete_CkStringBuilder $sbAuth
    delete_CkRest $rest
    delete_CkJsonObject $json
    delete_CkStringBuilder $sbPath
    delete_CkStringBuilder $sbJsonRequest
    delete_CkStringBuilder $sbJsonResponse
    exit
}

# Sample JSON response is shown below.
puts [CkJsonObject_emit $json]

puts "success"

# ------------------------------------------------
# A sample JSON response:

# 	{ 
# 	  "id": "1LY5310469661362J",
# 	  "create_time": "2016-11-24T00:40:50Z",
# 	  "update_time": "2016-11-24T00:40:54Z",
# 	  "amount": { 
# 	    "total": "4.54",
# 	    "currency": "USD"
# 	  },
# 	  "is_final_capture": true,
# 	  "state": "completed",
# 	  "reasonCode": "None",
# 	  "parent_payment": "PAY-2CY489250W145633HLA3DK3Y",
# 	  "transaction_fee": { 
# 	    "value": "0.43",
# 	    "currency": "USD"
# 	  },
# 	  "links": [
# 	    { 
# 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J",
# 	      "rel": "self",
# 	      "method": "GET"
# 	    },
# 	    { 
# 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J/refund",
# 	      "rel": "refund",
# 	      "method": "POST"
# 	    },
# 	    { 
# 	      "href": "https://api.sandbox.paypal.com/v1/payments/authorization/7X8332687A4929542",
# 	      "rel": "authorization",
# 	      "method": "GET"
# 	    },
# 	    { 
# 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
# 	      "rel": "parent_payment",
# 	      "method": "GET"
# 	    }
# 	  ]
# 	

delete_CkJsonObject $jsonToken
delete_CkStringBuilder $sbAuth
delete_CkRest $rest
delete_CkJsonObject $json
delete_CkStringBuilder $sbPath
delete_CkStringBuilder $sbJsonRequest
delete_CkStringBuilder $sbJsonResponse