Thank Bernd, below is my script. Appreciate if you can help check it. Thanks a millon
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#!/usr/bin/env python3
-*- coding: utf-8 -*-
import argparse
import sys
import time
import requests
from urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)
def check_url(url: str,
timeout: int = 10,
verify_ssl: bool = True,
user_agent: str = “Checkmk-HTTP-Monitor/1.0”,
expected_string: str = None,
warn_ms: float = None,
crit_ms: float = None):
headers = {
“User-Agent”: user_agent,
“Accept”: “text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8”,
“Accept-Language”: “en-US,en;q=0.5”,
“Accept-Encoding”: “gzip, deflate”,
“Connection”: “keep-alive”,
“Upgrade-Insecure-Requests”: “1”,
}
start = time.time()
try:
resp = requests.get(
url,
headers=headers,
timeout=timeout,
verify=verify_ssl,
allow_redirects=True,
)
end = time.time()
elapsed_ms = (end - start) \* 1000.0
elapsed_s = (end - start)
size = len(resp.content)
if resp.status_code != 200:
status_code = 2
msg = f"HTTP CRITICAL - Status {resp.status_code} - time {elapsed_ms:.0f}ms - size {size}B - {url}"
else:
if crit_ms is not None and elapsed_ms > crit_ms:
status_code = 2
msg = (f"HTTP CRITICAL - response time {elapsed_ms:.0f}ms - threadshold {crit_ms:.0f}ms "
f"- Status 200 - size {size}B - {url}")
elif warn_ms is not None and elapsed_ms > warn_ms:
status_code = 1
msg = (f"HTTP WARNING - response time {elapsed_ms:.0f}ms - threadshold {warn_ms:.0f}ms "
f"- Status 200 - size {size}B - {url}")
else:
status_code = 0
msg = f"HTTP OK - Status 200 - time {elapsed_ms:.0f}ms - size {size}B - {url}"
if expected_string:
try:
text = resp.text
except Exception:
text = resp.content.decode(resp.encoding or "utf-8", errors="ignore")
if expected_string not in text:
status_code = 2
msg = (f"HTTP CRITICAL - expected string not found: '{expected_string}' "
f"- time {elapsed_ms:.0f}ms - Status 200 - size {size}B - {url}")
\# === perfdata：用秒，不带单位；size 用字节纯数字 ===
perf = f"latency={elapsed_ms:.0f}ms;"
if warn_ms is not None or crit_ms is not None:
warn_s = "" if warn_ms is None else (float(warn_ms))
crit_s = "" if crit_ms is None else (float(crit_ms))
perf += f"{warn_s};{crit_s};0;"
else:
perf += ";;;0;"
perf += f" size={size};;;0;"
print(f"{status_code} HTTP_Check {msg} | {perf}")
return status_code
except requests.exceptions.SSLError as e:
print(f"2 HTTP_Check HTTP CRITICAL - SSL Error: {e}")
return 2
except requests.exceptions.Timeout as e:
elapsed_ms = (time.time() - start) \* 1000.0
print(f"2 HTTP_Check HTTP CRITICAL - Timeout after {elapsed_ms:.0f}ms: {e}")
return 2
except requests.exceptions.ConnectionError as e:
print(f"2 HTTP_Check HTTP CRITICAL - Connection Error: {e}")
return 2
except requests.exceptions.RequestException as e:
print(f"2 HTTP_Check HTTP CRITICAL - Request Error: {e}")
return 2
except Exception as e:
print(f"3 HTTP_Check HTTP UNKNOWN - {e}")
return 3
def main():
parser = argparse.ArgumentParser(description=“Generic HTTP/HTTPS monitor for Checkmk/Nagios”)
parser.add_argument(“url”, help=“URL to monitor, e.g. https://example.com/health")
parser.add_argument(”-t", “–timeout”, type=int, default=10, help=“Timeout seconds (default: 10)”)
parser.add_argument(“–no-verify-ssl”, action=“store_false”, dest=“verify_ssl”,
help=“Disable SSL certificate verification”)
parser.add_argument(“-e”, “–expected-string”, help=“Expected string in response body (optional)”)
parser.add_argument(“-w”, “–warn-ms”, type=float, help=“Warning threshold for response time (ms)”)
parser.add_argument(“-c”, “–crit-ms”, type=float, help=“Critical threshold for response time (ms)”)
parser.add_argument(“–user-agent”, default=“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36”,
help=“Custom User-Agent (optional)”)
args = parser.parse_args()
if not args.url.startswith(("http://", "https://")):
print("2 HTTP_Check HTTP CRITICAL - URL must start with http:// or https://")
sys.exit(2)
rc = check_url(
url=args.url,
timeout=args.timeout,
verify_ssl=args.verify_ssl,
user_agent=args.user_agent,
expected_string=args.expected_string,
warn_ms=args.warn_ms,
crit_ms=args.crit_ms,
)
sys.exit(rc)
if _name_ == “_main_”:
main()
