Merge pull request 'feat: Add exponential retry for api connection' (#8) from exp_retry into master

Reviewed-on: DGNum/stateless-uptime-kuma#8
Reviewed-by: thubrecht <tom.hubrecht@dgnum.eu>

stateless_uptime_kuma/cli.py

@@ -1,9 +1,11 @@
 import json
 import logging
 import sys
+import time
 
 import click
 import click_log
+import uptime_kuma_api
 from uptime_kuma_api import UptimeKumaApi
 
 from .hydratation import hydrate_http_probes
@@ -14,6 +16,20 @@ logger = logging.getLogger(__name__)
 click_log.basic_config()
 
 
+def get_api_with_retries(host, retries=5):
+    delay = 5
+    while True:
+        try:
+            return UptimeKumaApi(host)
+        except uptime_kuma_api.exceptions.UptimeKumaException:
+            logger.warn(f"Error while connectiong, retrying in {delay}s.")
+            if retries == 0:
+                raise
+            retries -= 1
+        time.sleep(delay)
+        delay *= 4
+
+
 @click.group()
 def cli():
     pass
@@ -76,7 +92,8 @@ def apply_json(
     logger.debug(
         f"Flags value:\n - scrape_http_keywords: {scrape_http_keywords}\n - no_autocreate_tags: {no_autocreate_tags}\n - keywords_fallback: {keywords_fallback}"
     )
-    with UptimeKumaApi(host) as api:
+
+    with get_api_with_retries(host) as api:
         logging.debug("Reading json")
         data = json.load(file)
         logging.debug("Parsing json")