Create request serializer selection based on content-type header

pyproject.toml

@@ -34,5 +34,15 @@ dev = [
     "pytest>=8.4.1",
     "pytest-cov>=6.2.1",
     "uvicorn>=0.35.0",
+    { "include-group" = "all_containers" },
 ]
 
+xml = ["lxml>=6.0.0", ]
+msgpack = ["msgpack>=1.1.1", ]
+json = ["orjson>=3.11.0", ]
+
+all_containers = [
+    { "include-group" = "xml" },
+    { "include-group" = "msgpack" },
+    { "include-group" = "json" },
+]

src/turbosloth/__main__.py

@@ -2,17 +2,21 @@ from __future__ import annotations
 
 from turbosloth import SlothApp
 from turbosloth.exceptions import NotFoundException
+from turbosloth.interfaces.serialized import SerializedResponse, SerializedRequest
 from turbosloth.types import Scope, Receive, Send, BasicRequest, BasicResponse
 
 app = SlothApp()
 
 
 @app.get("/")
-async def index(req: BasicRequest) -> BasicResponse:
+async def index(req: SerializedRequest) -> SerializedResponse:
-    return BasicResponse(200, {}, b'Hello, ASGI Router!')
+    return SerializedResponse(200, {}, 'Hello, ASGI Router!')
 
 
 @app.get("/user/")
-async def get_user(req: BasicRequest) -> BasicResponse:
+@app.post("/user/")
-    print(req.query)
+async def get_user(req: SerializedRequest) -> SerializedResponse:
-    return BasicResponse(200, {}, f'Hello, User {req.query["id"]}!'.encode())
+    print(req.basic.query)
+    resp = {'message': f'Hello, User ы {req.basic.query["id"]}!', 'from': 'server'}
+    resp['echo'] = req.body
+    return SerializedResponse(200, {}, resp)

src/turbosloth/app.py

@@ -2,6 +2,8 @@ import json
 from typing import Optional, Callable, Awaitable, Protocol
 
 from .exceptions import HTTPException
+from .interfaces.serialize_selector import SerializeSelector
+from .interfaces.serialized import SerializedResponse, TextSerializedResponse
 from .router import Router
 from .types import Scope, Receive, Send, MethodType, HandlerType, BasicRequest, BasicResponse
 
@@ -14,6 +16,8 @@ class ASGIApp(Protocol):
 
 
 class HTTPApp(ASGIApp):
+    serialize_selector: SerializeSelector
+
     async def _do_http(self, scope: Scope, receive: Receive, send: Send):
         method = scope['method']
         path = scope['path']
@@ -27,12 +31,25 @@ class HTTPApp(ASGIApp):
         scope['body'] = body
 
         req = BasicRequest.from_scope(scope)
+        sresponser = TextSerializedResponse
+        charset = 'latin1'
 
         try:
             handler = self.router.match(method, path)
-            resp = await handler(req)
+
+            ser = self.serialize_selector.select(req.headers)
+            sresponser = ser.resp
+            charset = ser.charset
+            sreq = ser.req.deserialize(req, charset)
+
+            sresp = await handler(sreq)
         except HTTPException as e:
-            resp = BasicResponse(e.code, {'content-type': 'text/plain'}, str(e).encode())
+            sresp = SerializedResponse(e.code, {}, str(e))
+
+        try:
+            resp = sresponser.into_basic(sresp, charset)
+        except UnicodeEncodeError:
+            resp = sresponser.into_basic(sresp, 'utf-8')
 
         await send(resp.into_start_message())
         await send({
@@ -115,15 +132,16 @@ class SlothApp(HTTPApp, WSApp, LifespanApp, MethodRoutersApp):
         self.router = Router()
         self._on_startup = on_startup
         self._on_shutdown = on_shutdown
+        self.serialize_selector = SerializeSelector()
 
     async def __call__(self, scope: Scope, receive: Receive, send: Send):
         t = scope['type']
         if t == 'http':
-            await self._do_http(scope, receive, send)
+            return await self._do_http(scope, receive, send)
         elif t == 'lifespan':
-            await self._do_lifespan(receive, send)
+            return await self._do_lifespan(receive, send)
         elif t == 'websocket':
-            await self._do_websocket(scope, receive, send)
+            return await self._do_websocket(scope, receive, send)
 
         raise RuntimeError(f'Unsupported scope type: {t}')
 

src/turbosloth/interfaces/base.py

@@ -0,0 +1,71 @@
+from __future__ import annotations
+from dataclasses import dataclass
+from typing import Any, Mapping
+
+from case_insensitive_dict import CaseInsensitiveDict
+import urllib.parse
+
+
+@dataclass
+class BasicRequest:
+    method: str
+    path: str
+    headers: CaseInsensitiveDict[str, str]
+    query: dict[str, list[str] | str]
+    body: bytes
+
+    def __init__(self,
+                 method: str,
+                 path: str,
+                 headers: Mapping[str, str],
+                 query: dict[str, list[str] | str],
+                 body: bytes):
+        self.method = method
+        self.path = path
+        self.headers = CaseInsensitiveDict(headers)
+        self.query = query
+        self.body = body
+
+    @classmethod
+    def from_scope(cls, scope: dict) -> BasicRequest:
+        path = scope['path']
+        method = scope['method']
+        headers = {}
+        for key, value in scope.get('headers', []):
+            headers[key.decode('latin1')] = value.decode('latin1')
+
+        qs = scope['query_string'].decode('latin1')
+        print(qs)
+        query_raw = urllib.parse.parse_qs(qs)
+        query = {}
+        for k, v in query_raw.items():
+            if len(v) == 1:
+                v = v[0]
+            query[k] = v
+
+        body = scope['body']
+
+        return BasicRequest(method, path, headers, query, body)
+
+
+@dataclass
+class BasicResponse:
+    code: int
+    headers: CaseInsensitiveDict[str, str]
+    body: bytes
+
+    def __init__(self, code: int, headers: Mapping[str, str], body: bytes):
+        self.code = code
+        self.headers = CaseInsensitiveDict(headers)
+        self.body = body
+
+    def into_start_message(self) -> dict:
+        enc_headers = []
+        for k, v in self.headers.items():
+            enc_headers.append((k.encode('latin1'), v.encode('latin1')))
+
+        return {
+            'type': 'http.response.start',
+            'status': self.code,
+            'headers': enc_headers
+        }

src/turbosloth/interfaces/serialize_selector.py

@@ -0,0 +1,60 @@
+from typing import NamedTuple, Optional
+
+from case_insensitive_dict import CaseInsensitiveDict
+
+from turbosloth.exceptions import NotAcceptableException
+from turbosloth.interfaces.serialized import SerializedRequest, SerializedResponse, default_serializers
+
+from turbosloth.util import parse_content_type
+
+
+class SerializeChoise(NamedTuple):
+    req: type[SerializedRequest]
+    resp: type[SerializedResponse]
+    charset: str
+    content_properties: dict
+
+
+class SerializeSelector:
+    default_content_type: str
+    serializers: dict[str, tuple[type[SerializedRequest], type[SerializedResponse]]]
+
+    def __init__(self,
+                 default_content_type: Optional[str] = 'text/plain',
+                 filter_content_types: Optional[list[str]] = None):
+
+        self.default_content_type = default_content_type
+        ser = {}
+
+        if filter_content_types is None:
+            filter_content_types = default_serializers.keys()
+
+        for k, v in default_serializers.items():
+            if k in filter_content_types:
+                ser[k] = v
+        self.serializers = ser
+
+    def select(self, headers: CaseInsensitiveDict[str, str]) -> SerializeChoise:
+        contenttype_header = headers.get('Content-Type')
+        if contenttype_header is None:
+            contenttype = self.default_content_type
+            properties = {}
+        else:
+            contenttype, properties = parse_content_type(contenttype_header)
+
+        charset = properties.get('charset')
+
+        if charset is None:
+            if contenttype == 'application/json':
+                charset = 'utf-8'
+            else:
+                charset = 'latin1'
+
+        choise = self.serializers.get(contenttype)
+        if choise is None:
+            choise = self.serializers.get(self.default_content_type)
+        if choise is None:
+            raise NotAcceptableException('acceptable content types: ' + ', '.join(self.serializers.keys()))
+        req, resp = choise
+
+        return SerializeChoise(req, resp, charset, properties)

src/turbosloth/interfaces/serialized/__init__.py

@@ -0,0 +1,30 @@
+from .base import SerializedRequest, SerializedResponse
+
+default_serializers = {}
+
+try:
+    from .text import TextSerializedRequest, TextSerializedResponse
+
+    default_serializers['text/plain'] = (TextSerializedRequest, TextSerializedResponse)
+except:
+    pass
+try:
+    from .json import JsonSerializedRequest, JsonSerializedResponse
+
+    default_serializers['application/json'] = (JsonSerializedRequest, JsonSerializedResponse)
+except:
+    pass
+
+try:
+    from .xml import XMLSerializedRequest, XMLSerializedResponse
+
+    default_serializers['application/xml'] = (XMLSerializedRequest, XMLSerializedResponse)
+except:
+    pass
+
+try:
+    from .msgpack import MessagePackSerializedRequest, MessagePackSerializedResponse
+
+    default_serializers['application/vnd.msgpack'] = (MessagePackSerializedRequest, MessagePackSerializedResponse)
+except:
+    pass

src/turbosloth/interfaces/serialized/base.py

@@ -0,0 +1,25 @@
+from dataclasses import dataclass
+from typing import Any, Mapping
+
+from turbosloth.interfaces.base import BasicRequest, BasicResponse
+
+
+@dataclass
+class SerializedRequest:
+    body: dict[str, Any] | list | str | None
+    basic: BasicRequest
+    charset: str
+
+    @classmethod
+    def deserialize(cls, basic: BasicRequest, charset: str):
+        raise NotImplementedError()
+
+
+@dataclass
+class SerializedResponse:
+    code: int
+    headers: Mapping[str, str]
+    body: dict[str, Any] | list | str
+
+    def into_basic(self, charset: str) -> BasicResponse:
+        raise NotImplementedError()

src/turbosloth/interfaces/serialized/json.py

@@ -0,0 +1,27 @@
+import orjson
+
+from case_insensitive_dict import CaseInsensitiveDict
+
+from turbosloth.interfaces.base import BasicRequest, BasicResponse
+from .base import SerializedRequest, SerializedResponse
+
+
+class JsonSerializedRequest(SerializedRequest):
+    @classmethod
+    def deserialize(cls, basic: BasicRequest, charset: str):
+        if len(basic.body) == 0:
+            b = None
+        elif charset.lower() in {'utf-8', 'utf8'}:
+            b = orjson.loads(basic.body)
+        else:
+            btxt = basic.body.decode(charset)
+            b = orjson.loads(btxt.encode('utf-8'))
+        return cls(b, basic, charset)
+
+
+class JsonSerializedResponse(SerializedResponse):
+    def into_basic(self, charset: str) -> BasicResponse:
+        headers = CaseInsensitiveDict(self.headers).copy()
+        headers['content-type'] = 'application/json; charset=utf-8'
+        b = orjson.dumps(self.body)
+        return BasicResponse(self.code, headers, b)

src/turbosloth/interfaces/serialized/msgpack.py

@@ -0,0 +1,23 @@
+import msgpack
+from case_insensitive_dict import CaseInsensitiveDict
+
+from turbosloth.interfaces.base import BasicRequest, BasicResponse
+from .base import SerializedRequest, SerializedResponse
+
+
+class MessagePackSerializedRequest(SerializedRequest):
+    @classmethod
+    def deserialize(cls, basic: BasicRequest, charset: str):
+        if len(basic.body) == 0:
+            b = None
+        else:
+            b = msgpack.unpackb(basic.body)
+        return cls(b, basic, charset)
+
+
+class MessagePackSerializedResponse(SerializedResponse):
+    def into_basic(self, charset: str) -> BasicResponse:
+        headers = CaseInsensitiveDict(self.headers).copy()
+        headers['content-type'] = 'application/vnd.msgpack'
+        b = msgpack.packb(self.body)
+        return BasicResponse(self.code, headers, b)

src/turbosloth/interfaces/serialized/text.py

@@ -0,0 +1,18 @@
+from case_insensitive_dict import CaseInsensitiveDict
+
+from turbosloth.interfaces.base import BasicRequest, BasicResponse
+from .base import SerializedRequest, SerializedResponse
+
+
+class TextSerializedRequest(SerializedRequest):
+    @classmethod
+    def deserialize(cls, basic: BasicRequest, charset: str):
+        b = basic.body.decode(charset)
+        return cls(b, basic, charset)
+
+
+class TextSerializedResponse(SerializedResponse):
+    def into_basic(self, charset: str) -> BasicResponse:
+        headers = CaseInsensitiveDict(self.headers).copy()
+        headers['content-type'] = 'text/plain; charset=' + charset
+        return BasicResponse(self.code, headers, str(self.body).encode(charset))

src/turbosloth/interfaces/serialized/xml.py

@@ -0,0 +1,63 @@
+import json
+from typing import Any
+
+from case_insensitive_dict import CaseInsensitiveDict
+
+from turbosloth.interfaces.base import BasicRequest, BasicResponse
+from .base import SerializedRequest, SerializedResponse
+
+from lxml import etree
+
+
+class XMLSerializedRequest(SerializedRequest):
+    @classmethod
+    def deserialize(cls, basic: BasicRequest, charset: str):
+        if len(basic.body) == 0:
+            b = {}
+        else:
+            btxt = basic.body.decode(charset)
+            parsed = etree.fromstring(btxt)
+            b = {child.tag: child.text for child in parsed}
+
+        return cls(b, basic, charset)
+
+
+class XMLSerializedResponse(SerializedResponse):
+    def into_basic(self, charset: str) -> BasicResponse:
+        headers = CaseInsensitiveDict(self.headers).copy()
+        headers['content-type'] = 'application/xml; charset=' + charset
+
+        btxt = _into_xml(self.body)
+
+        return BasicResponse(self.code, headers, btxt.encode(charset))
+
+
+def _into_xml(data: dict[str, Any] | list[Any] | str) -> str:
+    def _build_element(parent: etree.Element, key: str, value: Any) -> None:
+        element = etree.SubElement(parent, key)
+
+        if isinstance(value, dict):
+            for k, v in value.items():
+                _build_element(element, k, v)
+        elif isinstance(value, list):
+            for item in value:
+                _build_element(element, key, item)
+        elif value is not None:
+            element.text = str(value)
+
+    # Создаем корневой элемент
+    root = etree.Element('response')
+
+    if isinstance(data, dict):
+        # Если входной тип — dict, используем его ключи как теги
+        for key, value in data.items():
+            _build_element(root, key, value)
+    elif isinstance(data, list):
+        # Если список, оборачиваем элементы в общий тег "item"
+        for item in data:
+            _build_element(root, 'item', item)
+    elif isinstance(data, str):
+        # Если строка, добавляем как текст корневого элемента
+        root.text = data
+
+    return etree.tostring(root, pretty_print=True, encoding="unicode")

src/turbosloth/types.py

@@ -8,10 +8,13 @@ import urllib.parse
 
 from case_insensitive_dict.case_insensitive_dict import CaseInsensitiveDict
 
+from turbosloth.interfaces.base import BasicRequest, BasicResponse
+from turbosloth.interfaces.serialized import SerializedResponse, SerializedRequest
+
 type Scope = Dict
 type Receive = Callable[[], Awaitable[Dict]]
 type Send = Callable[[Dict], Awaitable[None]]
-type HandlerType = Callable[[BasicRequest], Awaitable[BasicResponse]]
+type HandlerType = Callable[[SerializedRequest], Awaitable[SerializedResponse]]
 
 type MethodType = (
         Literal['GET'] |
@@ -24,54 +27,3 @@ type MethodType = (
         Literal['CONNECT'] |
         Literal['OPTIONS'] |
         Literal['TRACE'])
-
-K = TypeVar('K')
-V = TypeVar('V')
-
-
-@dataclass
-class BasicRequest:
-    method: str
-    path: str
-    headers: CaseInsensitiveDict[str, str]
-    query: dict[str, list[str] | str]
-    body: dict[str, Any]
-
-    @classmethod
-    def from_scope(cls, scope: Scope) -> BasicRequest:
-        path = scope['path']
-        method = scope['method']
-        headers = CaseInsensitiveDict()
-        for key, value in scope.get('headers', []):
-            headers[key.decode('latin1')] = value.decode('latin1')
-
-        qs = scope['query_string'].decode('latin1')
-        print(qs)
-        query_raw = urllib.parse.parse_qs(qs)
-        query = {}
-        for k, v in query_raw.items():
-            if len(v) == 1:
-                v = v[0]
-            query[k] = v
-
-        body = scope['body']
-
-        return BasicRequest(method, path, headers, query, body)
-
-
-@dataclass
-class BasicResponse:
-    code: int
-    headers: CaseInsensitiveDict[str, str]
-    body: bytes
-
-    def into_start_message(self) -> dict:
-        enc_headers = []
-        for k, v in self.headers.items():
-            enc_headers.append((k.encode('latin1'), v.encode('latin1')))
-
-        return {
-            'type': 'http.response.start',
-            'status': self.code,
-            'headers': enc_headers
-        }

src/turbosloth/util.py

@@ -0,0 +1,6 @@
+from email.policy import EmailPolicy
+
+
+def parse_content_type(content_type: str) -> tuple[str, dict]:
+    header = EmailPolicy.header_factory('content-type', content_type)
+    return header.content_type, dict(header.params)

uv.lock

@@ -121,6 +121,30 @@ wheels = [
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 ]
 
+[[package]]
+name = "lxml"
+version = "6.0.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/c5/ed/60eb6fa2923602fba988d9ca7c5cdbd7cf25faa795162ed538b527a35411/lxml-6.0.0.tar.gz", hash = "sha256:032e65120339d44cdc3efc326c9f660f5f7205f3a535c1fdbf898b29ea01fb72", size = 4096938, upload-time = "2025-06-26T16:28:19.373Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/79/21/6e7c060822a3c954ff085e5e1b94b4a25757c06529eac91e550f3f5cd8b8/lxml-6.0.0-cp313-cp313-macosx_10_13_universal2.whl", hash = "sha256:6da7cd4f405fd7db56e51e96bff0865b9853ae70df0e6720624049da76bde2da", size = 8414372, upload-time = "2025-06-26T16:26:39.079Z" },
+    { url = "https://files.pythonhosted.org/packages/a4/f6/051b1607a459db670fc3a244fa4f06f101a8adf86cda263d1a56b3a4f9d5/lxml-6.0.0-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:b34339898bb556a2351a1830f88f751679f343eabf9cf05841c95b165152c9e7", size = 4593940, upload-time = "2025-06-26T16:26:41.891Z" },
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 [package.dev-dependencies]
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+    { name = "msgpack" },
+    { name = "orjson" },
+]
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+]
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