Merge pull request #97 from CHIMEFRB/96-bug-issue-with-datatrail-cli-…

…scout-function

fix(cli): check minoc status

dtcli/ps.py

@@ -66,6 +66,14 @@ def ps(
     except Exception as e:
         error_console.print(e)
         return None
+
+    # Check Canfar status.
+    canfar_up = cadcclient.status()
+    if not canfar_up:
+        error_console.print(
+            "Either Minoc is down or certificate is invalid.", style="bold yellow"
+        )
+
     try:
         files, policies = functions.ps(scope, dataset, verbose, quiet)
         if isinstance(files, str) or isinstance(policies, str):

dtcli/pull.py

@@ -10,7 +10,7 @@
 
 from dtcli.config import procure
 from dtcli.src.functions import find_missing_dataset_files, get_files
-from dtcli.utilities.cadcclient import size
+from dtcli.utilities import cadcclient
 from dtcli.utilities.utilities import set_log_level, validate_scope
 
 logger = logging.getLogger("pull")
@@ -42,7 +42,7 @@
 @click.option("-q", "--quiet", is_flag=True, help="Set log level to ERROR.")
 @click.option("--force", "-f", is_flag=True, help="Do not prompt for confirmation.")
 @click.pass_context
-def pull(
+def pull(  # noqa: C901
     ctx: click.Context,
     scope: str,
     dataset: str,
@@ -97,6 +97,13 @@ def pull(
         error_console.print(e)
         return None
 
+    # Check Canfar status.
+    canfar_up = cadcclient.status()
+    if not canfar_up:
+        error_console.print(
+            "Either Minoc is down or certificate is invalid.", style="bold yellow"
+        )
+
     # Find files missing from localhost.
     console.print(f"\nSearching for files for {dataset} {scope}...\n")
     files = find_missing_dataset_files(scope, dataset, directory, verbose)
@@ -111,7 +118,7 @@ def pull(
     if len(files_paths) > 0:
         common_path = path.commonpath(["/" + f for f in files_paths])
         try:
-            to_download_size = size(common_path)
+            to_download_size = cadcclient.size(common_path)
         except SSLError:
             error_console.print(
                 """

dtcli/scout.py

@@ -78,6 +78,13 @@ def scout(  # noqa: C901
         )
         return {"error": "No config. Create one with `datatrail config init`."}
 
+    # Check Canfar status.
+    canfar_up = cadcclient.status()
+    if not canfar_up:
+        error_console.print(
+            "Either Minoc is down or certificate is invalid.", style="bold yellow"
+        )
+
     # Scout dataset.
     endpoint = (
         f"/query/dataset/scout?name={dataset}"
@@ -113,6 +120,10 @@ def scout(  # noqa: C901
             error_console.print("Query failed.")
             error_console.print(error)
             return None
+        except Exception as error:
+            error_console.print("Query failed.")
+            error_console.print(error)
+            return None
         data[scope]["observed"]["minoc"] = count
 
         keys_missing_in_observed = list(

dtcli/utilities/cadcclient.py

@@ -9,9 +9,11 @@
 
 import cadcutils
 import dill
+import requests
 from cadcdata import StorageInventoryClient
 from cadctap import CadcTapClient
 from cadcutils import net
+from requests.exceptions import HTTPError
 from rich.traceback import install
 
 from dtcli.config import procure
@@ -364,3 +366,33 @@ def query(
     content = buffer.getvalue()
     sys.stdout = sys.__stdout__
     return [line.split(",") for line in content.split("\n")]
+
+
+def status(
+    url: str = "https://ws-uv.canfar.net/minoc/capabilities",
+    certfile: Optional[str] = None,
+) -> bool:
+    """Check the status of Minoc.
+
+    Args:
+        url: Minoc capabilities HEAD endpoint.
+        certfile: Canfar certificate file.
+
+    Returns:
+        bool: True if Minoc is up, False otherwise.
+    """
+    if not certfile:
+        certfile = procure(key="vospace_certfile")
+    response = requests.get(url, cert=certfile, allow_redirects=True)
+    try:
+        response.raise_for_status()
+    except HTTPError as error:
+        logger.error(error)
+        logger.error("Canfar is down.")
+        return False
+    authorised = response.headers.get("x-vo-authenticated")
+    if isinstance(authorised, str):
+        return True
+    else:
+        logger.error("Canfar certificate is not valid.")
+        return False