Earlier I a question asking how to create a connection before calling POST, GET etc using the Python Requests library:
Create connection using Python Request library before calling post/get etc
turns out I couldn’t.
I’m now using the httpclient library and have this:
import http.client as httplib
params = my_params()
headers = {"Connection": "Keep-Alive"}
conn = httplib.HTTPSConnection("api.domain.com:443")
conn.request("POST", "/api/service", params, headers)
response = conn.getresponse()
I was hoping it would establish the connection first. However, the line:
conn = httplib.HTTPSConnection("api.domain.com:443")
is only taking 2ms to complete and I know the latency to the recipient is approximately 95ms. So, I presume this line isn’t creating the connection and it’s still being created along with the POST.
How can I make a POST request in Python, where the connection is already established before make the POST request?
Something like:
conn = https.connect("api.domain.com:443")
# Connection established before making POST
conn.request("POST", "/api/service", params, headers)
>Solution :
Yes, in http.client library, the connection is established when you make the request using the request() method. The line conn = httplib.HTTPSConnection("api.domain.com:443") creates the connection object but doesn’t establish the actual connection.
If you want to establish the connection before making the request, you can use the connect() method.
Like this:
import http.client as httplib
params = my_params()
headers = {"Connection": "Keep-Alive"}
conn = httplib.HTTPSConnection("api.domain.com:443")
conn.connect()
conn.request("POST", "/api/service", params, headers)
response = conn.getresponse()
conn.close()
Source: https://docs.python.org/3/library/http.client.html#http.client.HTTPConnection.connect