implement #29

README.md

@@ -68,7 +68,32 @@ class RealClient(RequestsClient):
 
     @post("todos")
     def create_todo(self, body: Todo) -> Todo:
-        """Создаем Todo"""
+        pass
+```
+
+You can use Callable ```(...) -> str``` as the url source, 
+all parameters passed to the client method can be obtained inside the Callable
+
+```python
+from requests import Session
+from dataclass_rest import get
+from dataclass_rest.http.requests import RequestsClient
+
+def url_generator(todo_id: int) -> str:
+    return f"/todos/{todo_id}/"
+
+
+class RealClient(RequestsClient):
+    def __init__(self):
+        super().__init__("https://dummyjson.com/", Session())
+
+    @get(url_generator)
+    def todo(self, todo_id: int) -> Todo:
+        pass
+
+
+client = RealClient()
+client.todo(5)
 ```
 
 ## Asyncio

src/dataclass_rest/__init__.py

@@ -1,7 +1,11 @@
 __all__ = [
     "File",
     "rest",
-    "get", "put", "post", "patch", "delete",
+    "get",
+    "put",
+    "post",
+    "patch",
+    "delete",
 ]
 
 from .http_request import File

src/dataclass_rest/boundmethod.py

@@ -13,11 +13,11 @@
 
 class BoundMethod(ClientMethodProtocol, ABC):
     def __init__(
-            self,
-            name: str,
-            method_spec: MethodSpec,
-            client: ClientProtocol,
-            on_error: Optional[Callable[[Any], Any]],
+        self,
+        name: str,
+        method_spec: MethodSpec,
+        client: ClientProtocol,
+        on_error: Optional[Callable[[Any], Any]],
     ):
         self.name = name
         self.method_spec = method_spec
@@ -26,21 +26,31 @@ def __init__(
 
     def _apply_args(self, *args, **kwargs) -> Dict:
         return getcallargs(
-            self.method_spec.func, self.client, *args, **kwargs,
+            self.method_spec.func,
+            self.client,
+            *args,
+            **kwargs,
         )
 
     def _get_url(self, args) -> str:
-        return self.method_spec.url_template.format(**args)
+        args = {
+            arg: value
+            for arg, value in args.items()
+            if arg in self.method_spec.url_params
+        }
+        return self.method_spec.url_template(**args)
 
     def _get_body(self, args) -> Any:
         python_body = args.get(self.method_spec.body_param_name)
         return self.client.request_body_factory.dump(
-            python_body, self.method_spec.body_type,
+            python_body,
+            self.method_spec.body_type,
         )
 
     def _get_query_params(self, args) -> Any:
         return self.client.request_args_factory.dump(
-            args, self.method_spec.query_params_type,
+            args,
+            self.method_spec.query_params_type,
         )
 
     def _get_files(self, args) -> Dict[str, File]:
@@ -51,11 +61,11 @@ def _get_files(self, args) -> Dict[str, File]:
         }
 
     def _create_request(
-            self,
-            url: str,
-            query_params: Any,
-            files: Dict[str, File],
-            data: Any,
+        self,
+        url: str,
+        query_params: Any,
+        files: Dict[str, File],
+        data: Any,
     ) -> HttpRequest:
         return HttpRequest(
             method=self.method_spec.http_method,

src/dataclass_rest/client_protocol.py

@@ -25,7 +25,9 @@ def load(self, data: Any, class_: Type[TypeT]) -> TypeT:
         raise NotImplementedError
 
     def dump(
-            self, data: TypeT, class_: Optional[Type[TypeT]] = None,
+        self,
+        data: TypeT,
+        class_: Optional[Type[TypeT]] = None,
     ) -> Any:
         raise NotImplementedError
 
@@ -37,6 +39,7 @@ class ClientProtocol(Protocol):
     method_class: Optional[Callable]
 
     def do_request(
-            self, request: HttpRequest,
+        self,
+        request: HttpRequest,
     ) -> Any:
         raise NotImplementedError

src/dataclass_rest/http/aiohttp.py

@@ -48,9 +48,9 @@ class AiohttpClient(BaseClient):
     method_class = AiohttpMethod
 
     def __init__(
-            self,
-            base_url: str,
-            session: Optional[ClientSession] = None,
+        self,
+        base_url: str,
+        session: Optional[ClientSession] = None,
     ):
         super().__init__()
         self.session = session or ClientSession()
@@ -68,7 +68,8 @@ async def do_request(self, request: HttpRequest) -> Any:
             for name, file in request.files.items():
                 data.add_field(
                     name,
-                    filename=file.filename, content_type=file.content_type,
+                    filename=file.filename,
+                    content_type=file.content_type,
                     value=file.contents,
                 )
         try:

src/dataclass_rest/http/requests.py

@@ -16,7 +16,6 @@
 
 
 class RequestsMethod(SyncMethod):
-
     def _on_error_default(self, response: Response) -> Any:
         if 400 <= response.status_code < 500:
             raise ClientError(response.status_code)
@@ -39,9 +38,9 @@ class RequestsClient(BaseClient):
     method_class = RequestsMethod
 
     def __init__(
-            self,
-            base_url: str,
-            session: Optional[Session] = None,
+        self,
+        base_url: str,
+        session: Optional[Session] = None,
     ):
         super().__init__()
         self.session = session or Session()

src/dataclass_rest/method.py

@@ -7,9 +7,9 @@
 
 class Method:
     def __init__(
-            self,
-            method_spec: MethodSpec,
-            method_class: Optional[Callable[..., BoundMethod]] = None,
+        self,
+        method_spec: MethodSpec,
+        method_class: Optional[Callable[..., BoundMethod]] = None,
     ):
         self.name = method_spec.func.__name__
         self.method_spec = method_spec
@@ -29,7 +29,9 @@ def __set_name__(self, owner, name):
             )
 
     def __get__(
-            self, instance: Optional[ClientProtocol], objtype=None,
+        self,
+        instance: Optional[ClientProtocol],
+        objtype=None,
     ) -> BoundMethod:
         return self.method_class(
             name=self.name,

src/dataclass_rest/methodspec.py

@@ -3,21 +3,22 @@
 
 class MethodSpec:
     def __init__(
-            self,
-            func: Callable,
-            *,
-            url_template: str,
-            http_method: str,
-            response_type: Type,
-            body_param_name: str,
-            body_type: Type,
-            is_json_request: bool,
-            query_params_type: Type,
-            file_param_names: List[str],
-            additional_params: Dict[str, Any],
+        self,
+        func: Callable,
+        url_template: Callable[..., str],
+        url_params: List[str],
+        http_method: str,
+        response_type: Type,
+        body_param_name: str,
+        body_type: Type,
+        is_json_request: bool,  # noqa: FBT001
+        query_params_type: Type,
+        file_param_names: List[str],
+        additional_params: Dict[str, Any],
     ):
         self.func = func
         self.url_template = url_template
+        self.url_params = url_params
         self.http_method = http_method
         self.response_type = response_type
         self.body_param_name = body_param_name

src/dataclass_rest/parse_func.py

@@ -1,22 +1,33 @@
 import string
 from inspect import FullArgSpec, getfullargspec, isclass
-from typing import Any, Callable, Dict, List, Sequence, Type, TypedDict
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    List,
+    Sequence,
+    Type,
+    TypeAlias,
+    TypedDict,
+    Union,
+)
 
 from .http_request import File
 from .methodspec import MethodSpec
 
 DEFAULT_BODY_PARAM = "body"
+UrlTemplate: TypeAlias = Union[str, Callable[..., str]]
 
 
-def get_url_params(url_template: str) -> List[str]:
+def get_url_params_from_string(url_template: str) -> List[str]:
     parsed_format = string.Formatter().parse(url_template)
-    return [x[1] for x in parsed_format]
+    return [x[1] for x in parsed_format if x[1]]
 
 
 def create_query_params_type(
-        spec: FullArgSpec,
-        func: Callable,
-        skipped: Sequence[str],
+    spec: FullArgSpec,
+    func: Callable,
+    skipped: Sequence[str],
 ) -> Type:
     fields = {}
     self_processed = False
@@ -31,14 +42,14 @@ def create_query_params_type(
 
 
 def create_body_type(
-        spec: FullArgSpec,
-        body_param_name: str,
+    spec: FullArgSpec,
+    body_param_name: str,
 ) -> Type:
     return spec.annotations.get(body_param_name, Any)
 
 
 def create_response_type(
-        spec: FullArgSpec,
+    spec: FullArgSpec,
 ) -> Type:
     return spec.annotations.get("return", Any)
 
@@ -51,23 +62,42 @@ def get_file_params(spec):
     ]
 
 
+def get_url_params_from_callable(
+    url_template: Callable[..., str],
+) -> List[str]:
+    url_template_func_arg_spec = getfullargspec(url_template)
+    return url_template_func_arg_spec.args
+
+
 def parse_func(
-        func: Callable,
-        *,
-        method: str,
-        url_template: str,
-        additional_params: Dict[str, Any],
-        is_json_request: bool,
-        body_param_name: str,
+    func: Callable,
+    method: str,
+    url_template: UrlTemplate,
+    additional_params: Dict[str, Any],
+    is_json_request: bool,  # noqa: FBT001
+    body_param_name: str,
 ) -> MethodSpec:
     spec = getfullargspec(func)
-    url_params = get_url_params(url_template)
     file_params = get_file_params(spec)
+
+    is_string_url_template = isinstance(url_template, str)
+    url_template_callable = (
+        url_template.format if is_string_url_template else url_template
+    )
+
+    url_params = (
+        get_url_params_from_string(url_template)
+        if is_string_url_template
+        else get_url_params_from_callable(url_template)
+    )
+
     skipped_params = url_params + file_params + [body_param_name]
+
     return MethodSpec(
         func=func,
         http_method=method,
-        url_template=url_template,
+        url_template=url_template_callable,
+        url_params=url_params,
         query_params_type=create_query_params_type(spec, func, skipped_params),
         body_type=create_body_type(spec, body_param_name),
         response_type=create_response_type(spec),

src/dataclass_rest/rest.py

@@ -2,13 +2,13 @@
 
 from .boundmethod import BoundMethod
 from .method import Method
-from .parse_func import DEFAULT_BODY_PARAM, parse_func
+from .parse_func import DEFAULT_BODY_PARAM, UrlTemplate, parse_func
 
 _Func = TypeVar("_Func", bound=Callable[..., Any])
 
 
 def rest(
-    url_template: str,
+    url_template: UrlTemplate,
     *,
     method: str,
     body_name: str = DEFAULT_BODY_PARAM,

tests/requests/conftest.py

@@ -12,6 +12,7 @@ def session():
 @pytest.fixture
 def mocker(session):
     with requests_mock.Mocker(
-            session=session, case_sensitive=True,
+        session=session,
+        case_sensitive=True,
     ) as session_mock:
         yield session_mock