mirror of
https://github.com/langgenius/dify.git
synced 2024-11-16 19:59:50 +08:00
97 lines
3.4 KiB
Python
97 lines
3.4 KiB
Python
"""
|
|
Proxy requests to avoid SSRF
|
|
"""
|
|
|
|
import logging
|
|
import os
|
|
import time
|
|
|
|
import httpx
|
|
|
|
SSRF_PROXY_ALL_URL = os.getenv("SSRF_PROXY_ALL_URL", "")
|
|
SSRF_PROXY_HTTP_URL = os.getenv("SSRF_PROXY_HTTP_URL", "")
|
|
SSRF_PROXY_HTTPS_URL = os.getenv("SSRF_PROXY_HTTPS_URL", "")
|
|
SSRF_DEFAULT_MAX_RETRIES = int(os.getenv("SSRF_DEFAULT_MAX_RETRIES", "3"))
|
|
SSRF_DEFAULT_TIME_OUT = float(os.getenv("SSRF_DEFAULT_TIME_OUT", "5"))
|
|
SSRF_DEFAULT_CONNECT_TIME_OUT = float(os.getenv("SSRF_DEFAULT_CONNECT_TIME_OUT", "5"))
|
|
SSRF_DEFAULT_READ_TIME_OUT = float(os.getenv("SSRF_DEFAULT_READ_TIME_OUT", "5"))
|
|
SSRF_DEFAULT_WRITE_TIME_OUT = float(os.getenv("SSRF_DEFAULT_WRITE_TIME_OUT", "5"))
|
|
|
|
proxy_mounts = (
|
|
{
|
|
"http://": httpx.HTTPTransport(proxy=SSRF_PROXY_HTTP_URL),
|
|
"https://": httpx.HTTPTransport(proxy=SSRF_PROXY_HTTPS_URL),
|
|
}
|
|
if SSRF_PROXY_HTTP_URL and SSRF_PROXY_HTTPS_URL
|
|
else None
|
|
)
|
|
|
|
BACKOFF_FACTOR = 0.5
|
|
STATUS_FORCELIST = [429, 500, 502, 503, 504]
|
|
|
|
|
|
def make_request(method, url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
if "allow_redirects" in kwargs:
|
|
allow_redirects = kwargs.pop("allow_redirects")
|
|
if "follow_redirects" not in kwargs:
|
|
kwargs["follow_redirects"] = allow_redirects
|
|
|
|
if "timeout" not in kwargs:
|
|
kwargs["timeout"] = httpx.Timeout(
|
|
SSRF_DEFAULT_TIME_OUT,
|
|
connect=SSRF_DEFAULT_CONNECT_TIME_OUT,
|
|
read=SSRF_DEFAULT_READ_TIME_OUT,
|
|
write=SSRF_DEFAULT_WRITE_TIME_OUT,
|
|
)
|
|
|
|
retries = 0
|
|
while retries <= max_retries:
|
|
try:
|
|
if SSRF_PROXY_ALL_URL:
|
|
with httpx.Client(proxy=SSRF_PROXY_ALL_URL) as client:
|
|
response = client.request(method=method, url=url, **kwargs)
|
|
elif proxy_mounts:
|
|
with httpx.Client(mounts=proxy_mounts) as client:
|
|
response = client.request(method=method, url=url, **kwargs)
|
|
else:
|
|
with httpx.Client() as client:
|
|
response = client.request(method=method, url=url, **kwargs)
|
|
|
|
if response.status_code not in STATUS_FORCELIST:
|
|
return response
|
|
else:
|
|
logging.warning(f"Received status code {response.status_code} for URL {url} which is in the force list")
|
|
|
|
except httpx.RequestError as e:
|
|
logging.warning(f"Request to URL {url} failed on attempt {retries + 1}: {e}")
|
|
|
|
retries += 1
|
|
if retries <= max_retries:
|
|
time.sleep(BACKOFF_FACTOR * (2 ** (retries - 1)))
|
|
|
|
raise Exception(f"Reached maximum retries ({max_retries}) for URL {url}")
|
|
|
|
|
|
def get(url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
return make_request("GET", url, max_retries=max_retries, **kwargs)
|
|
|
|
|
|
def post(url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
return make_request("POST", url, max_retries=max_retries, **kwargs)
|
|
|
|
|
|
def put(url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
return make_request("PUT", url, max_retries=max_retries, **kwargs)
|
|
|
|
|
|
def patch(url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
return make_request("PATCH", url, max_retries=max_retries, **kwargs)
|
|
|
|
|
|
def delete(url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
return make_request("DELETE", url, max_retries=max_retries, **kwargs)
|
|
|
|
|
|
def head(url, max_retries=SSRF_DEFAULT_MAX_RETRIES, **kwargs):
|
|
return make_request("HEAD", url, max_retries=max_retries, **kwargs)
|