fix: increase timeout rate of lora metadata/model downloads

hordelib/model_manager/lora.py

@@ -44,14 +44,19 @@ class LoraModelManager(BaseModelManager):
     )
     LORA_API = "https://civitai.com/api/v1/models?types=LORA&sort=Highest%20Rated&primaryFileOnly=true"
     MAX_RETRIES = 10 if not TESTS_ONGOING else 3
-    MAX_DOWNLOAD_THREADS = 3
+    MAX_DOWNLOAD_THREADS = 5 if not TESTS_ONGOING else 15
     RETRY_DELAY = 3 if not TESTS_ONGOING else 0.2
     """The time to wait between retries in seconds"""
-    REQUEST_METADATA_TIMEOUT = 20
-    """The time to wait for a response from the server in seconds"""
-    REQUEST_DOWNLOAD_TIMEOUT = 300
-    """The time to wait for a response from the server in seconds"""
-    THREAD_WAIT_TIME = 2
+    REQUEST_METADATA_TIMEOUT = 20  # Longer because civitai performs poorly on metadata requests for more than 5 models
+    """The maximum time for no data to be received before we give up on a metadata fetch, in seconds"""
+    REQUEST_DOWNLOAD_TIMEOUT = 10 if not TESTS_ONGOING else 1
+    """The maximum time for no data to be received before we give up on a download, in seconds
+
+    This is not the time to download the file, but the time to wait in between data packets. \
+    If we're actively downloading and the connection to the server is alive, this doesn't come into play
+    """
+
+    THREAD_WAIT_TIME = 0.1
     """The time to wait between checking the download queue in seconds"""
 
     _file_lock: multiprocessing_lock | nullcontext
@@ -274,21 +279,42 @@ def _add_lora_ids_to_download_queue(self, lora_ids, adhoc=False, version_compare
     def _get_json(self, url):
         retries = 0
         while retries <= self.MAX_RETRIES:
+            response = None
             try:
-                response = requests.get(url, timeout=self.REQUEST_METADATA_TIMEOUT)
+                response = requests.get(
+                    url,
+                    timeout=self.REQUEST_METADATA_TIMEOUT if len(url) < 200 else self.REQUEST_METADATA_TIMEOUT * 1.5,
+                )
                 response.raise_for_status()
                 # Attempt to decode the response to JSON
                 return response.json()
 
             except (requests.HTTPError, requests.ConnectionError, requests.Timeout, json.JSONDecodeError) as e:
-                # CivitAI Errors when the model ID is too long
-                if response.status_code in [404, 500]:
+                logger.debug(f"url '{url}' download failed {type(e)} {e}")
+
+                # If this is a 401, 404, or 500, we're not going to get anywhere, just give up
+                # The following are the CivitAI errors encountered so far
+                # (and all of them will not fix themselves with retries as of writing)
+                # [401: requires a token, 404: model ID too long, 500: internal server error]
+                if response is not None and response.status_code in [401, 404, 500]:
                     logger.debug(f"url '{url}' download failed with status code {response.status_code}")
                     return None
 
-                logger.debug(f"url '{url}' download failed {type(e)} {e}")
+                # The json being invalid is a CivitAI issue, possibly it showing an HTML page and
+                # this isn't likely to change in the next 30 seconds, so we'll try twice more
+                # and give up if it doesn't work
+                if isinstance(e, json.JSONDecodeError):
+                    logger.debug(f"url '{url}' download failed with {type(e)} {e}")
+                    retries += 3
+
+                # If the network connection timed out, then self.REQUEST_METADATA_TIMEOUT seconds passed
+                # and the clock is ticking, so we'll try once more
+                if response is None:
+                    retries += 5
+
                 retries += 1
                 self.total_retries_attempted += 1
+
                 if retries <= self.MAX_RETRIES:
                     time.sleep(self.RETRY_DELAY)
                 else:
@@ -674,8 +700,8 @@ def clear_all_references(self):
     def wait_for_downloads(self, timeout=None):
         rtr = 0
         while not self.are_downloads_complete():
-            time.sleep(0.5)
-            rtr += 0.5
+            time.sleep(self.THREAD_WAIT_TIME)
+            rtr += self.THREAD_WAIT_TIME
             if timeout and rtr > timeout:
                 raise Exception(f"Lora downloads exceeded specified timeout ({timeout})")
         logger.debug("Downloads complete")
@@ -973,7 +999,7 @@ def reset_adhoc_loras(self):
             if self._stop_all_threads:
                 logger.debug("Stopped processing thread")
                 return
-            time.sleep(0.2)
+            time.sleep(self.THREAD_WAIT_TIME)
         now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
         self._adhoc_loras = set()
         unsorted_items = []
@@ -1073,8 +1099,8 @@ def is_adhoc_reset_complete(self):
     def wait_for_adhoc_reset(self, timeout=15):
         rtr = 0
         while not self.is_adhoc_reset_complete():
-            time.sleep(0.2)
-            rtr += 0.2
+            time.sleep(self.THREAD_WAIT_TIME)
+            rtr += self.THREAD_WAIT_TIME
             if timeout and rtr > timeout:
                 raise Exception(f"Lora adhoc reset exceeded specified timeout ({timeout})")