Parameter and header get value refactor

openapi_core/schema/parameters.py

@@ -45,38 +45,6 @@ def get_explode(param_or_header: Spec) -> bool:
     return style == "form"
 
 
-def get_value(
-    param_or_header: Spec,
-    location: Mapping[str, Any],
-    name: Optional[str] = None,
-) -> Any:
-    """Returns parameter/header value from specific location"""
-    name = name or param_or_header["name"]
-    style = get_style(param_or_header)
-
-    if name not in location:
-        # Only check if the name is not in the location if the style of
-        # the param is deepObject,this is because deepObjects will never be found
-        # as their key also includes the properties of the object already.
-        if style != "deepObject":
-            raise KeyError
-        keys_str = " ".join(location.keys())
-        if not re.search(rf"{name}\[\w+\]", keys_str):
-            raise KeyError
-
-    aslist = get_aslist(param_or_header)
-    explode = get_explode(param_or_header)
-    if aslist and explode:
-        if style == "deepObject":
-            return get_deep_object_value(location, name)
-        if isinstance(location, SuportsGetAll):
-            return location.getall(name)
-        if isinstance(location, SuportsGetList):
-            return location.getlist(name)
-
-    return location[name]
-
-
 def get_deep_object_value(
     location: Mapping[str, Any],
     name: Optional[str] = None,

openapi_core/templating/media_types/finders.py

@@ -10,6 +10,10 @@ class MediaTypeFinder:
     def __init__(self, content: Spec):
         self.content = content
 
+    def get_first(self) -> MediaType:
+        mimetype, media_type = next(self.content.items())
+        return MediaType(media_type, mimetype)
+
     def find(self, mimetype: str) -> MediaType:
         if mimetype in self.content:
             return MediaType(self.content / mimetype, mimetype)

openapi_core/unmarshalling/unmarshallers.py

@@ -89,22 +89,21 @@ def _unmarshal_schema(self, schema: Spec, value: Any) -> Any:
 
     def _get_param_or_header_value(
         self,
+        raw: Any,
         param_or_header: Spec,
-        location: Mapping[str, Any],
-        name: Optional[str] = None,
     ) -> Any:
         casted, schema = self._get_param_or_header_value_and_schema(
-            param_or_header, location, name
+            raw, param_or_header
         )
         if schema is None:
             return casted
         return self._unmarshal_schema(schema, casted)
 
     def _get_content_value(
-        self, raw: Any, mimetype: str, content: Spec
+        self, raw: Any, content: Spec, mimetype: Optional[str] = None
     ) -> Any:
         casted, schema = self._get_content_value_and_schema(
-            raw, mimetype, content
+            raw, content, mimetype
         )
         if schema is None:
             return casted

openapi_core/validation/request/validators.py

@@ -189,8 +189,9 @@ def _get_parameter(
 
         param_location = param["in"]
         location = parameters[param_location]
+
         try:
-            return self._get_param_or_header_value(param, location)
+            return self._get_param_or_header(param, location, name=name)
         except KeyError:
             required = param.getkey("required", False)
             if required:
@@ -248,7 +249,7 @@ def _get_body(
         content = request_body / "content"
 
         raw_body = self._get_body_value(body, request_body)
-        return self._get_content_value(raw_body, mimetype, content)
+        return self._get_content_value(raw_body, content, mimetype)
 
     def _get_body_value(self, body: Optional[str], request_body: Spec) -> Any:
         if not body:

openapi_core/validation/response/validators.py

@@ -114,7 +114,7 @@ def _get_data(
         content = operation_response / "content"
 
         raw_data = self._get_data_value(data)
-        return self._get_content_value(raw_data, mimetype, content)
+        return self._get_content_value(raw_data, content, mimetype)
 
     def _get_data_value(self, data: str) -> Any:
         if not data:
@@ -163,7 +163,7 @@ def _get_header(
             )
 
         try:
-            return self._get_param_or_header_value(header, headers, name=name)
+            return self._get_param_or_header(header, headers, name=name)
         except KeyError:
             required = header.getkey("required", False)
             if required:

openapi_core/validation/validators.py

@@ -1,4 +1,5 @@
 """OpenAPI core validation validators module"""
+import re
 from functools import cached_property
 from typing import Any
 from typing import Mapping
@@ -23,7 +24,12 @@
 )
 from openapi_core.protocols import Request
 from openapi_core.protocols import WebhookRequest
-from openapi_core.schema.parameters import get_value
+from openapi_core.schema.parameters import get_aslist
+from openapi_core.schema.parameters import get_deep_object_value
+from openapi_core.schema.parameters import get_explode
+from openapi_core.schema.parameters import get_style
+from openapi_core.schema.protocols import SuportsGetAll
+from openapi_core.schema.protocols import SuportsGetList
 from openapi_core.spec import Spec
 from openapi_core.templating.media_types.datatypes import MediaType
 from openapi_core.templating.paths.datatypes import PathOperationServer
@@ -70,10 +76,14 @@ def __init__(
         self.extra_format_validators = extra_format_validators
         self.extra_media_type_deserializers = extra_media_type_deserializers
 
-    def _get_media_type(self, content: Spec, mimetype: str) -> MediaType:
+    def _get_media_type(
+        self, content: Spec, mimetype: Optional[str] = None
+    ) -> MediaType:
         from openapi_core.templating.media_types.finders import MediaTypeFinder
 
         finder = MediaTypeFinder(content)
+        if mimetype is None:
+            return finder.get_first()
         return finder.find(mimetype)
 
     def _deserialise_media_type(self, mimetype: str, value: Any) -> Any:
@@ -99,25 +109,74 @@ def _validate_schema(self, schema: Spec, value: Any) -> None:
         )
         validator.validate(value)
 
-    def _get_param_or_header_value(
+    def _get_param_or_header(
+        self,
+        param_or_header: Spec,
+        location: Mapping[str, Any],
+        name: Optional[str] = None,
+    ) -> Any:
+        # Simple scenario
+        if "content" not in param_or_header:
+            return self._get_simple_value(param_or_header, location, name=name)
+
+        # Complex scenario
+        return self._get_complex(param_or_header, location, name=name)
+
+    def _get_simple_value(
         self,
         param_or_header: Spec,
         location: Mapping[str, Any],
         name: Optional[str] = None,
+    ) -> Any:
+        try:
+            raw = self._get_style_value(param_or_header, location, name=name)
+        except KeyError:
+            if "schema" not in param_or_header:
+                raise
+            schema = param_or_header / "schema"
+            if "default" not in schema:
+                raise
+            raw = schema["default"]
+        return self._get_param_or_header_value(raw, param_or_header)
+
+    def _get_complex(
+        self,
+        param_or_header: Spec,
+        location: Mapping[str, Any],
+        name: Optional[str] = None,
+    ) -> Any:
+        content = param_or_header / "content"
+        try:
+            raw = self._get_media_type_value(
+                param_or_header, location, name=name
+            )
+        except KeyError:
+            if "schema" not in param_or_header:
+                raise
+            schema = param_or_header / "schema"
+            if "default" not in schema:
+                raise
+            raw = schema["default"]
+        return self._get_content_value(raw, content)
+
+    def _get_param_or_header_value(
+        self,
+        raw: Any,
+        param_or_header: Spec,
     ) -> Any:
         casted, schema = self._get_param_or_header_value_and_schema(
-            param_or_header, location, name
+            raw, param_or_header
         )
         if schema is None:
             return casted
         self._validate_schema(schema, casted)
         return casted
 
     def _get_content_value(
-        self, raw: Any, mimetype: str, content: Spec
+        self, raw: Any, content: Spec, mimetype: Optional[str] = None
     ) -> Any:
         casted, schema = self._get_content_value_and_schema(
-            raw, mimetype, content
+            raw, content, mimetype
         )
         if schema is None:
             return casted
@@ -126,39 +185,19 @@ def _get_content_value(
 
     def _get_param_or_header_value_and_schema(
         self,
+        raw: Any,
         param_or_header: Spec,
-        location: Mapping[str, Any],
-        name: Optional[str] = None,
     ) -> Tuple[Any, Spec]:
-        try:
-            raw_value = get_value(param_or_header, location, name=name)
-        except KeyError:
-            if "schema" not in param_or_header:
-                raise
-            schema = param_or_header / "schema"
-            if "default" not in schema:
-                raise
-            casted = schema["default"]
-        else:
-            # Simple scenario
-            if "content" not in param_or_header:
-                deserialised = self._deserialise_style(
-                    param_or_header, raw_value
-                )
-                schema = param_or_header / "schema"
-            # Complex scenario
-            else:
-                content = param_or_header / "content"
-                mimetype, media_type = next(content.items())
-                deserialised = self._deserialise_media_type(
-                    mimetype, raw_value
-                )
-                schema = media_type / "schema"
-            casted = self._cast(schema, deserialised)
+        deserialised = self._deserialise_style(param_or_header, raw)
+        schema = param_or_header / "schema"
+        casted = self._cast(schema, deserialised)
         return casted, schema
 
     def _get_content_value_and_schema(
-        self, raw: Any, mimetype: str, content: Spec
+        self,
+        raw: Any,
+        content: Spec,
+        mimetype: Optional[str] = None,
     ) -> Tuple[Any, Optional[Spec]]:
         media_type, mimetype = self._get_media_type(content, mimetype)
         deserialised = self._deserialise_media_type(mimetype, raw)
@@ -170,6 +209,45 @@ def _get_content_value_and_schema(
         schema = media_type / "schema"
         return casted, schema
 
+    def _get_style_value(
+        self,
+        param_or_header: Spec,
+        location: Mapping[str, Any],
+        name: Optional[str] = None,
+    ) -> Any:
+        name = name or param_or_header["name"]
+        style = get_style(param_or_header)
+        if name not in location:
+            # Only check if the name is not in the location if the style of
+            # the param is deepObject,this is because deepObjects will never be found
+            # as their key also includes the properties of the object already.
+            if style != "deepObject":
+                raise KeyError
+            keys_str = " ".join(location.keys())
+            if not re.search(rf"{name}\[\w+\]", keys_str):
+                raise KeyError
+
+        aslist = get_aslist(param_or_header)
+        explode = get_explode(param_or_header)
+        if aslist and explode:
+            if style == "deepObject":
+                return get_deep_object_value(location, name)
+            if isinstance(location, SuportsGetAll):
+                return location.getall(name)
+            if isinstance(location, SuportsGetList):
+                return location.getlist(name)
+
+        return location[name]
+
+    def _get_media_type_value(
+        self,
+        param_or_header: Spec,
+        location: Mapping[str, Any],
+        name: Optional[str] = None,
+    ) -> Any:
+        name = name or param_or_header["name"]
+        return location[name]
+
 
 class BaseAPICallValidator(BaseValidator):
     @cached_property