Pre-Request Script for Amazon SP API

import time

import datetime, hashlib, hmac

import json

access_key='{{access_key}}'                 # Provide Values     

secret_key='{{secret_key}}'                 # Provide Values

host = '{{host}}'                           # Provide Values

endpoint = '{{hostname}}'                   # Provide Values

canonical_uri = '{{canonical_uri}}'         # Provide Values

body = {{body}}                             # Provide Values

##########################################################################################################################################################

request_parameters =json.dumps(body)

t = datetime.datetime.utcnow()

amzdate = t.strftime('%Y%m%dT%H%M%SZ')

datestamp = t.strftime('%Y%m%d')

method = 'POST'

service = 'execute-api'

region = 'us-east-1'

canonical_querystring = ''

canonical_headers = 'host:' + host + '\\n' + 'x-amz-date:' + amzdate + '\\n'

signed_headers = 'host;x-amz-date'

payload_hash = hashlib.sha256((request_parameters).encode('utf-8')).hexdigest()

canonical_request = method + '\\n' + canonical_uri + '\\n' + canonical_querystring + '\\n' + canonical_headers + '\\n' + signed_headers + '\\n' + payload_hash

algorithm = 'AWS4-HMAC-SHA256'

credential_scope = datestamp + '/' + region + '/'+ service + '/' + 'aws4_request'

string_to_sign = algorithm + '\\n' +  amzdate + '\\n' +  credential_scope + '\\n' +  hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()

kDate = hmac.new(('AWS4' + secret_key).encode('utf-8'), datestamp.encode('utf-8'), hashlib.sha256).digest()

kRegion = hmac.new(kDate, region.encode('utf-8'), hashlib.sha256).digest()

kService = hmac.new(kRegion, service.encode('utf-8'), hashlib.sha256).digest()

kSigning = hmac.new(kService, 'aws4_request'.encode('utf-8'), hashlib.sha256).digest()

signing_key = kSigning

signature = hmac.new(signing_key, (string_to_sign).encode('utf-8'), hashlib.sha256).hexdigest()

authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' +  'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature

import time

import datetime, hashlib, hmac

import json

access_key='XXXXXXXXXXXXXXXXXX'

secret_key='XXXXXXXXXXXXXXXXXX'

method = 'POST'

service = 'execute-api'

host = 'sellingpartnerapi-na.amazon.com'

region = 'us-east-1'

endpoint = 'https://sellingpartnerapi-na.amazon.com'

body = {'reportType': 'GET_FLAT_FILE_ALL_ORDERS_DATA_BY_ORDER_DATE_GENERAL','dataStartTime': '{%yesterday%}T00:00:01','dataEndTime': '{%yesterday%}T23:59:59','marketplaceIds': ['XXXXXXXXXX']}

request_parameters =json.dumps(body)

t = datetime.datetime.utcnow()

amzdate = t.strftime('%Y%m%dT%H%M%SZ')

datestamp = t.strftime('%Y%m%d')

canonical_uri = '/reports/2021-06-30/reports'

canonical_querystring = ''

canonical_headers = 'host:' + host + '\\n' + 'x-amz-date:' + amzdate + '\\n'

signed_headers = 'host;x-amz-date'

payload_hash = hashlib.sha256((request_parameters).encode('utf-8')).hexdigest()

canonical_request = method + '\\n' + canonical_uri + '\\n' + canonical_querystring + '\\n' + canonical_headers + '\\n' + signed_headers + '\\n' + payload_hash

algorithm = 'AWS4-HMAC-SHA256'

credential_scope = datestamp + '/' + region + '/'+ service + '/' + 'aws4_request'

string_to_sign = algorithm + '\\n' +  amzdate + '\\n' +  credential_scope + '\\n' +  hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()

kDate = hmac.new(('AWS4' + secret_key).encode('utf-8'), datestamp.encode('utf-8'), hashlib.sha256).digest()

kRegion = hmac.new(kDate, region.encode('utf-8'), hashlib.sha256).digest()

kService = hmac.new(kRegion, service.encode('utf-8'), hashlib.sha256).digest()

kSigning = hmac.new(kService, 'aws4_request'.encode('utf-8'), hashlib.sha256).digest()

signing_key = kSigning

signature = hmac.new(signing_key, (string_to_sign).encode('utf-8'), hashlib.sha256).hexdigest()

authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' +  'SignedHeaders=' + signed_headers + ', ' + 'Signature=' + signature

import datetime, hashlib, hmac

host = '{{host}}'                      # Provide Values

endpoint = '{{hostname}}'              # Provide Values

access_key = '{{access_key}}'          # Provide Values

secret_key = '{{secret_key}}'          # Provide Values

canonical_uri = '{{canonical_uri}}'    # Provide Values

##########################################################################################################################################################

t = datetime.datetime.utcnow()

amzdate = t.strftime('%Y%m%dT%H%M%SZ')

datestamp = t.strftime('%Y%m%d')

method = 'GET'

service = 'execute-api'

region = 'us-east-1'

canonical_headers = 'host:' + host + '\\n' + 'x-amz-date:' + amzdate + '\\n'

signed_headers = 'host;x-amz-date'

payload_hash = hashlib.sha256(('').encode('utf-8')).hexdigest()

canonical_request = method + '\\n' + canonical_uri + '\\n' +canonical_headers + '\\n' + signed_headers + '\\n' + payload_hash

algorithm = 'AWS4-HMAC-SHA256'

credential_scope = datestamp + '/' + region + '/' + service + '/' + 'aws4_request'

string_to_sign = algorithm + '\\n' +  amzdate + '\\n' +  credential_scope + '\\n' +  hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()

kDate = hmac.new(('AWS4' + secret_key).encode('utf-8'), datestamp.encode('utf-8'), hashlib.sha256).digest()

kRegion = hmac.new(kDate, region.encode('utf-8'), hashlib.sha256).digest()

kService = hmac.new(kRegion, service.encode('utf-8'), hashlib.sha256).digest()

kSigning = hmac.new(kService, 'aws4_request'.encode('utf-8'), hashlib.sha256).digest()

signing_key = kSigning

signature = hmac.new(signing_key, (string_to_sign).encode('utf-8'), hashlib.sha256).hexdigest()

authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + credential_scope + ', ' +  'SignedHeader