Configure whether to open URLs when validating assets

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is (loosely) based on [Keep a Changelog](http://keepachangelog.com/)
 ### Added
 
 - Added publish.yml to automatically publish new releases to PyPI [#236](https://github.com/stac-utils/stac-validator/pull/236)
+- Configure whether to open URLs when validating assets [#238](https://github.com/stac-utils/stac-validator/pull/238)
 
 ## [v3.4.0] - 2024-10-08
 

README.md

@@ -106,6 +106,8 @@ Options:
   --collections            Validate /collections response.
   --item-collection        Validate item collection response. Can be combined
                            with --pages. Defaults to one page.
+  --no-assets-urls         Disables the opening of href links when validating
+                           assets (enabled by default).
   -p, --pages INTEGER      Maximum number of pages to validate via --item-
                            collection. Defaults to one page.
   -v, --verbose            Enables verbose output for recursive mode.

stac_validator/stac_validator.py

@@ -109,6 +109,11 @@ def collections_summary(message: List[Dict[str, Any]]) -> None:
     is_flag=True,
     help="Validate item collection response. Can be combined with --pages. Defaults to one page.",
 )
+@click.option(
+    "--no-assets-urls",
+    is_flag=True,
+    help="Disables the opening of href links when validating assets (enabled by default).",
+)
 @click.option(
     "--pages",
     "-p",
@@ -128,6 +133,7 @@ def main(
     stac_file: str,
     collections: bool,
     item_collection: bool,
+    no_assets_urls: bool,
     pages: int,
     recursive: bool,
     max_depth: int,
@@ -147,6 +153,7 @@ def main(
         stac_file (str): Path to the STAC file to be validated.
         collections (bool): Validate response from /collections endpoint.
         item_collection (bool): Whether to validate item collection responses.
+        no_assets_urls (bool): Whether to open href links when validating assets (enabled by default).
         pages (int): Maximum number of pages to validate via `item_collection`.
         recursive (bool): Whether to recursively validate all related STAC objects.
         max_depth (int): Maximum depth to traverse when recursing.
@@ -177,6 +184,7 @@ def main(
         core=core,
         links=links,
         assets=assets,
+        assets_open_urls=not no_assets_urls,
         extensions=extensions,
         custom=custom,
         verbose=verbose,

stac_validator/utilities.py

@@ -152,28 +152,31 @@ def set_schema_addr(version: str, stac_type: str) -> str:
 def link_request(
     link: Dict,
     initial_message: Dict,
+    open_urls: bool = True,
 ) -> None:
     """Makes a request to a URL and appends it to the relevant field of the initial message.
 
     Args:
         link: A dictionary containing a "href" key which is a string representing a URL.
         initial_message: A dictionary containing lists for "request_valid", "request_invalid",
         "format_valid", and "format_invalid" URLs.
+        open_urls: Whether to open link href URL
 
     Returns:
         None
 
     """
     if is_url(link["href"]):
         try:
-            if "s3" in link["href"]:
-                context = ssl._create_unverified_context()
-                response = urlopen(link["href"], context=context)
-            else:
-                response = urlopen(link["href"])
-            status_code = response.getcode()
-            if status_code == 200:
-                initial_message["request_valid"].append(link["href"])
+            if open_urls:
+                if "s3" in link["href"]:
+                    context = ssl._create_unverified_context()
+                    response = urlopen(link["href"], context=context)
+                else:
+                    response = urlopen(link["href"])
+                status_code = response.getcode()
+                if status_code == 200:
+                    initial_message["request_valid"].append(link["href"])
         except Exception:
             initial_message["request_invalid"].append(link["href"])
         initial_message["format_valid"].append(link["href"])

stac_validator/validate.py

@@ -33,6 +33,7 @@ class StacValidate:
         core (bool): Whether to only validate the core STAC object (without extensions).
         links (bool): Whether to additionally validate links (only works in default mode).
         assets (bool): Whether to additionally validate assets (only works in default mode).
+        assets_open_urls (bool): Whether to open assets URLs when validating assets.
         extensions (bool): Whether to only validate STAC object extensions.
         custom (str): The local filepath or remote URL of a custom JSON schema to validate the STAC object.
         verbose (bool): Whether to enable verbose output in recursive mode.
@@ -54,6 +55,7 @@ def __init__(
         core: bool = False,
         links: bool = False,
         assets: bool = False,
+        assets_open_urls: bool = True,
         extensions: bool = False,
         custom: str = "",
         verbose: bool = False,
@@ -67,6 +69,7 @@ def __init__(
         self.schema = custom
         self.links = links
         self.assets = assets
+        self.assets_open_urls = assets_open_urls
         self.recursive = recursive
         self.max_depth = max_depth
         self.extensions = extensions
@@ -122,7 +125,7 @@ def assets_validator(self) -> Dict:
         assets = self.stac_content.get("assets")
         if assets:
             for asset in assets.values():
-                link_request(asset, initial_message)
+                link_request(asset, initial_message, self.assets_open_urls)
         return initial_message
 
     def links_validator(self) -> Dict:

tests/test_assets.py

@@ -1,5 +1,5 @@
 """
-Description: Test --links option
+Description: Test --assets option
 
 """
 
@@ -78,6 +78,33 @@ def test_assets_v100():
     ]
 
 
+def test_assets_v100_no_links():
+    stac_file = "tests/test_data/v100/simple-item.json"
+    stac = stac_validator.StacValidate(stac_file, assets=True, assets_open_urls=False)
+    stac.run()
+    assert stac.message == [
+        {
+            "version": "1.0.0",
+            "path": "tests/test_data/v100/simple-item.json",
+            "schema": [
+                "https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json"
+            ],
+            "valid_stac": True,
+            "asset_type": "ITEM",
+            "validation_method": "default",
+            "assets_validated": {
+                "format_valid": [
+                    "https://storage.googleapis.com/open-cogs/stac-examples/20201211_223832_CS2_test.tif",
+                    "https://storage.googleapis.com/open-cogs/stac-examples/20201211_223832_CS2_test.jpg",
+                ],
+                "format_invalid": [],
+                "request_valid": [],
+                "request_invalid": [],
+            },
+        }
+    ]
+
+
 def test_assets_on_collection_without_assets_ok():
     stac_file = "tests/test_data/v100/collection.json"
     stac = stac_validator.StacValidate(stac_file, assets=True)