与Postman或cURL相比，Python请求太慢

Question

我试图在Python3中使用不同的方法进行单个API调用，但如果我与Postman和/或cURL中的相同请求进行比较，它们都非常慢。

这就是我正在尝试的:

headers = {
"Authorization": "Bearer " + self.access_token,
"Content-Type": "application/json",
"Accept-Encoding": "gzip, deflate, br",
"Connection": "keep-alive",
"Accept": "*/*",
"User-Agent": "PostmanRuntime/7.28.2",
"Cache-Control": "no-cache"
}
session = requests.Session()
api_res = session.get(self.api_endpoint, headers=headers, timeout=self.req_timeout,)

当运行这个调用时，它会卡住几分钟，直到我收到响应。例如，如果我使用Postman，我可以在1秒或更短的时间内得到结果。

我也尝试使用http.client,urllib3，但我仍然看到呼叫中的巨大延迟。

我也试着调试这个调用:

import http.client
http.client.HTTPConnection.debuglevel = 1
logging.basicConfig()
logging.getLogger().setLevel(logging.DEBUG)
requests_log = logging.getLogger("requests.packages.urllib3")
requests_log.setLevel(logging.DEBUG)
requests_log.propagate = True

调试反应:

[DEBUG] Starting new HTTPS connection (1): ...:443
header: Content-Type: application/json; charset=utf-8
header: Content-Length: 61
header: Connection: keep-alive
header: Date: ...
header: Cache-Control: no-cache
header: Pragma: no-cache
header: Expires: -1
header: WWW-Authenticate: Bearer
header: Access-Control-Allow-Origin: *
header: P3P: CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"
header: Access-Control-Allow-Methods: GET, POST, OPTIONS, HEAD
header: X-XSS-Protection: 1; mode=block
header: Access-Control-Allow-Headers: accept, authorization, content-type, Cache-Control, P3P, GE-IGNORE-CACHE, Signature, fromMobile, ssoToken, fromAdmin, fromGameapp, fromGtv, fromGameapp, ManagerOrgUnitUserName, ManagerOrgUnitId, g-s-x, g-s-x-t, g-s-i-i, User-Agent, Referer, Origin, Access-Control-Allow-Headers
header: X-Content-Type-Options: nosniff
header: X-XSS-Protection: 1; mode=block
header: Referrer-Policy: same-origin
header: Strict-Transport-Security: max-age=31536000; includeSubDomains
header: X-Cache: Error from cloudfront
header: Via: 1.1 ....cloudfront.net (CloudFront)
header: X-Amz-Cf-Pop: ORD52-C1
header: X-Amz-Cf-Id: ...

你知道为什么它这么慢吗?例如，当我复制到Postman时，它不会发生什么?

即使来自Google也要花很多时间:

requests.get("https://www.google.com")

我也意识到它是与ipv4工作，而不是与ipv6。

谢谢!

Answer 1

我发现IPv6不工作，但IPv4是。我必须像这样强制调用IPv4:

import socket
import requests.packages.urllib3.util.connection as urllib3_cn
urllib3_cn.allowed_gai_family = lambda: socket.AF_INET