(Tcl) hotelbeds.com REST API Authentication

Demonstrates how to calculate the X-Signature header and add to requests sent to api.test.hotelbeds.com.

For more information, see https://developer.hotelbeds.com/documentation/getting-started/

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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.

# This example duplicates the following CURL statement provided in the hotelbeds.com "Getting Started"
# developer documentation:

# #!/bin/bash 
# apiKey="yourApiKey"
# secret="yourSecret"
# curl -i \
#   -X GET \
#   -H 'Accept:application/json' \
#   -H 'Api-key:'$apiKey'' \
#   -H 'X-Signature:'$(echo -n ${apiKey}${secret}$(date +%s)|sha256sum|awk '{ print $1}')'' \
#   https://api.test.hotelbeds.com/hotel-api/1.0/status

# The "date + %s" command emits a UNIX date/time number such as 1605548842
# We need to concatenate the apiKey, secret, and current date/time in UNIX (numeric) time format.
set dt [new_CkDateTime]

CkDateTime_SetFromCurrentSystemTime $dt
# Get the UNIX time string in the GMT timezone.
set bLocalTime 0
set unixTimeStr [CkDateTime_getAsUnixTimeStr $dt $bLocalTime]
puts "$unixTimeStr"

# Use your own API key and secret.  (These are not valid values)
set apiKey "227b20a2cb705e45f3b0a0944672dc07"
set secret "54dc7ba9e2"

set sb [new_CkStringBuilder]

CkStringBuilder_Append $sb $apiKey
CkStringBuilder_Append $sb $secret
CkStringBuilder_Append $sb $unixTimeStr

set crypt [new_CkCrypt2]

CkCrypt2_put_HashAlgorithm $crypt "sha256"
CkCrypt2_put_EncodingMode $crypt "hexlower"
set signature [CkCrypt2_hashStringENC $crypt [CkStringBuilder_getAsString $sb]]

puts "$signature"

set http [new_CkHttp]

CkHttp_SetRequestHeader $http "Accept" "application/json"
CkHttp_SetRequestHeader $http "Api-key" $apiKey
CkHttp_SetRequestHeader $http "X-Signature" $signature

set jsonResponse [CkHttp_quickGetStr $http "https://api.test.hotelbeds.com/hotel-api/1.0/status"]
puts "$jsonResponse"
puts [CkHttp_get_LastStatus $http]

# Sample output:  

# 1605549542
# 2146aefb36e7331b3b29aafd7638398ca22e689573224f1a71274d60bd201ec2
# {"auditData":{"timestamp":"2020-11-16 18:59:02.430"},"status":"OK"}
# 200

delete_CkDateTime $dt
delete_CkStringBuilder $sb
delete_CkCrypt2 $crypt
delete_CkHttp $http