Python 3 Gzip json for post on an API - json

Question

Having a bit of trouble getting a gzipped JSON payload with python 3
def post_data ( data ) :
method_name = json.loads(data)['subject'][4][0][1]
instance = json.loads(data)['serialNumber']
timestamp = datetime.datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ")
utc_now = datetime.datetime.utcnow().strftime("%m-%d-%Y %H:%M:%S")
not_after = datetime.datetime.strptime(json.loads(data)['notAfter'], "%b %d %H:%M:%S %Y GMT" ).strftime("%m-%d-%Y %H:%M:%S")
days = datetime.datetime.strptime(not_after, "%m-%d-%Y %H:%M:%S")-\
datetime.datetime.strptime(utc_now, "%m-%d-%Y %H:%M:%S")
values = days.days
raw_json = '''{"MetricReports":[{
"Metadata":{
"MinPeriod":"FiveMinute",
"MaxPeriod":"FiveMinute"
},
"Namespace":"Schema/Service",
"Metrics":[{
"Dimensions":{
"DataSet":"NONE",
"Marketplace":"PDX",
"HostGroup":"ALL",
"Host":"host.com",
"ServiceName":"Server",
"MethodName":"%s",
"Client":"ALL",
"MetricClass":"instance",
"Instance":"%s"
},
"MetricName":"daysToExpiry",
"Timestamp":"%s",
"Type":"MetricsLine",
"Unit":"None",
"Values":%s
}
]}
]}''' %(method_name, instance, timestamp, values)
headers = {'content-type' : 'application/x-gzip'}
putUrl = 'http://api-pdx.com/'
session = boto3.Session()
credentials = session.get_credentials()
region = 'us-west-2'
service = 'monitor-api'
auth = AWS4Auth(
credentials.access_key,
credentials.secret_key,
region,
service,
session_token = credentials.token)
r = requests.post(url = putUrl, json = gzip.compress(raw_json) , auth = auth, headers = headers, verify=False)
print(r.content)
get_data()
post_data(data)
I need to compress the raw_json because the API is expecting a gzipped attachment. The API is spitting back "The HTTP request is invalid. Reason: Invalid JSON attachment:Not in GZIP format" if I attempt to send the JSON as is.
I tried the gzip.compress, but it says : memoryview: a bytes-like object is required, not 'str'
so I tried gzip.compress(json.dumps(raw_json).encode('utf-8')) and that says Object of type bytes is not JSON serializable

Answer 1

To send a binary data with requests.post method they should be passed as data argument, not as json:
requests.post(url = putUrl,
data = gzip.compress(json.dumps(raw_json).encode('utf-8')),
auth = auth,
headers = headers,
verify=False)