Merge pull request #283 from maticardenas/282-url-schema-loader

feat: adding url schema loader functionality

openapi_tester/loaders.py

@@ -9,6 +9,7 @@
 from typing import TYPE_CHECKING, cast
 from urllib.parse import urlparse
 
+import requests
 import yaml
 from django.urls import Resolver404, resolve
 from django.utils.functional import cached_property
@@ -258,3 +259,28 @@ def load_schema(self) -> dict[str, Any]:
             return cast(
                 "dict", json.loads(content) if ".json" in self.path else yaml.load(content, Loader=yaml.FullLoader)
             )
+
+
+class UrlStaticSchemaLoader(BaseSchemaLoader):
+    """
+    Loads OpenAPI schema from an url static file.
+    """
+
+    def __init__(self, url: str, field_key_map: dict[str, str] | None = None):
+        super().__init__(field_key_map=field_key_map)
+        self.url = url
+
+    def load_schema(self) -> dict[str, Any]:
+        """
+        Loads a static OpenAPI schema from url, and parses it to a python dict.
+
+        :return: Schema contents as a dict
+        :raises: ImproperlyConfigured
+        """
+        response = requests.get(self.url, timeout=20)
+        return cast(
+            "dict",
+            json.loads(response.content)
+            if ".json" in self.url
+            else yaml.load(response.content, Loader=yaml.FullLoader),
+        )

openapi_tester/schema_tester.py

@@ -5,7 +5,8 @@
 from typing import TYPE_CHECKING, Any, Callable, cast
 
 from django.conf import settings
-from django.core.exceptions import ImproperlyConfigured
+from django.core.exceptions import ImproperlyConfigured, ValidationError
+from django.core.validators import URLValidator
 
 from openapi_tester.constants import (
     INIT_ERROR,
@@ -18,7 +19,12 @@
     VALIDATE_WRITE_ONLY_RESPONSE_KEY_ERROR,
 )
 from openapi_tester.exceptions import DocumentationError, OpenAPISchemaError, UndocumentedSchemaSectionError
-from openapi_tester.loaders import DrfSpectacularSchemaLoader, DrfYasgSchemaLoader, StaticSchemaLoader
+from openapi_tester.loaders import (
+    DrfSpectacularSchemaLoader,
+    DrfYasgSchemaLoader,
+    StaticSchemaLoader,
+    UrlStaticSchemaLoader,
+)
 from openapi_tester.utils import lazy_combinations, normalize_schema_section
 from openapi_tester.validators import (
     validate_enum,
@@ -46,7 +52,7 @@
 class SchemaTester:
     """Schema Tester: this is the base class of the library."""
 
-    loader: StaticSchemaLoader | DrfSpectacularSchemaLoader | DrfYasgSchemaLoader
+    loader: StaticSchemaLoader | DrfSpectacularSchemaLoader | DrfYasgSchemaLoader | UrlStaticSchemaLoader
     validators: list[Callable[[dict, Any], str | None]]
 
     def __init__(
@@ -70,7 +76,11 @@ def __init__(
         self.validators = validators or []
 
         if schema_file_path is not None:
-            self.loader = StaticSchemaLoader(schema_file_path, field_key_map=field_key_map)
+            try:
+                URLValidator()(schema_file_path)
+                self.loader = UrlStaticSchemaLoader(schema_file_path, field_key_map=field_key_map)
+            except ValidationError:
+                self.loader = StaticSchemaLoader(schema_file_path, field_key_map=field_key_map)
         elif "drf_spectacular" in settings.INSTALLED_APPS:
             self.loader = DrfSpectacularSchemaLoader(field_key_map=field_key_map)
         elif "drf_yasg" in settings.INSTALLED_APPS: