RequestURL and ResponseURL

tests/test_page_inputs.py

@@ -3,8 +3,10 @@
 import aiohttp.web_response
 import pytest
 import requests
-
 import parsel
+
+from web_poet import RequestUrl, ResponseUrl
+from web_poet._base import _Url
 from web_poet.page_inputs import (
     HttpRequest,
     HttpResponse,
@@ -72,7 +74,7 @@ def test_http_defaults(cls, body_cls):
     http_body = body_cls(b"content")
 
     obj = cls("url", body=http_body)
-    assert obj.url == "url"
+    assert str(obj.url) == "url"
     assert obj.body == b"content"
     assert not obj.headers
     assert obj.headers.get("user-agent") is None
@@ -164,7 +166,8 @@ def test_http_headers_init_dict(cls, headers_cls):
 
 def test_http_request_init_minimal():
     req = HttpRequest("url")
-    assert req.url == "url"
+    assert str(req.url) == "url"
+    assert isinstance(req.url, RequestUrl)
     assert req.method == "GET"
     assert isinstance(req.method, str)
     assert not req.headers
@@ -189,12 +192,20 @@ def test_http_request_init_full():
     http_body = HttpRequestBody(b"body")
     req_2 = HttpRequest("url", method="POST", headers=http_headers, body=http_body)
 
-    assert req_1.url == req_2.url
+    assert str(req_1.url) == str(req_2.url)
     assert req_1.method == req_2.method
     assert req_1.headers == req_2.headers
     assert req_1.body == req_2.body
 
 
+def test_http_request_init_with_response_url():
+    resp = HttpResponse("url", b"")
+    assert isinstance(resp.url, ResponseUrl)
+    req = HttpRequest(resp.url)
+    assert isinstance(req.url, RequestUrl)
+    assert str(req.url) == str(resp.url)
+
+
 def test_http_response_headers_from_bytes_dict():
     raw_headers = {
         b"Content-Length": [b"316"],
@@ -434,3 +445,31 @@ def test_browser_html():
     assert html.xpath("//p/text()").getall() == ["Hello, ", "world!"]
     assert html.css("p::text").getall() == ["Hello, ", "world!"]
     assert isinstance(html.selector, parsel.Selector)
+
+
+def test_url_base_class():
+    url_str = "http://example.com"
+    url = _Url(url_str)
+    assert str(url) == url_str
+    assert repr(url) == "_Url('http://example.com')"
+
+    with pytest.raises(TypeError):
+        _Url(123)
+
+
+def test_url_subclass():
+    url_str = "http://example.com"
+
+    class MyUrl(_Url):
+        pass
+
+    class MyUrl2(_Url):
+        pass
+
+    url = MyUrl(url_str)
+    assert str(url) == url_str
+    assert url._url == url_str
+    assert repr(url) == "MyUrl('http://example.com')"
+
+    url2 = MyUrl2(url)
+    assert str(url2) == str(url)

tests/test_requests.py

@@ -17,7 +17,7 @@ def async_mock():
     """Workaround since python 3.7 doesn't ship with asyncmock."""
 
     async def async_test(req):
-        return HttpResponse(req.url, body=b"")
+        return HttpResponse(str(req.url), body=b"")
 
     mock.MagicMock.__await__ = lambda x: async_test(x).__await__()
 
@@ -37,7 +37,7 @@ async def test_perform_request_from_httpclient(async_mock):
     response = await client.get(url)
 
     # The async downloader implementation should return the HttpResponse
-    assert response.url == url
+    assert str(response.url) == str(url)
     assert isinstance(response, HttpResponse)
 
 
@@ -47,15 +47,15 @@ async def test_http_client_single_requests(async_mock):
 
     with mock.patch("web_poet.page_inputs.client.HttpRequest") as mock_request:
         response = await client.request("url")
-        response.url == "url"
+        str(response.url) == "url"
 
         response = await client.get("url-get", headers={"X-Headers": "123"})
-        response.url == "url-get"
+        str(response.url) == "url-get"
 
         response = await client.post(
             "url-post", headers={"X-Headers": "123"}, body=b"body value"
         )
-        response.url == "url-post"
+        str(response.url) == "url-post"
 
         assert mock_request.call_args_list == [
             mock.call(
@@ -162,7 +162,7 @@ async def test_http_client_execute(async_mock):
     response = await client.execute(request)
 
     assert isinstance(response, HttpResponse)
-    assert response.url == "url-1"
+    assert str(response.url) == "url-1"
 
 
 @pytest.mark.asyncio

web_poet/__init__.py

@@ -1,15 +1,17 @@
 from .pages import WebPage, ItemPage, ItemWebPage, Injectable
 from .requests import request_backend_var
 from .page_inputs import (
-    Meta,
+    BrowserHtml,
     HttpClient,
     HttpRequest,
     HttpResponse,
     HttpRequestHeaders,
     HttpResponseHeaders,
     HttpRequestBody,
     HttpResponseBody,
-    BrowserHtml,
+    Meta,
+    RequestUrl,
+    ResponseUrl,
 )
 from .overrides import PageObjectRegistry, consume_modules, OverrideRule
 

web_poet/_base.py

@@ -4,7 +4,7 @@
 """
 
 
-from typing import Type, TypeVar, List, Dict
+from typing import Type, TypeVar, List, Dict, Union
 
 from multidict import CIMultiDict
 
@@ -32,3 +32,19 @@ def from_name_value_pairs(cls: Type[T_headers], arg: List[Dict]) -> T_headers:
         <_HttpHeaders('Content-Encoding': 'gzip', 'content-length': '648')>
         """
         return cls([(pair["name"], pair["value"]) for pair in arg])
+
+
+class _Url:
+    """ Base URL class.
+    """
+    def __init__(self, url: Union[str, '_Url']):
+        if not isinstance(url, (str, _Url)):
+            raise TypeError(f"`url` must be a str or an instance of _Url, "
+                            f"got {url.__class__} instance instead")
+        self._url = str(url)
+
+    def __str__(self) -> str:
+        return self._url
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}({self._url!r})"

web_poet/mixins.py

@@ -50,8 +50,8 @@ class ResponseShortcutsMixin(SelectableMixin):
 
     @property
     def url(self):
-        """Shortcut to HTML Response's URL."""
-        return self.response.url
+        """Shortcut to HTML Response's URL, as a string."""
+        return str(self.response.url)
 
     @property
     def html(self):

web_poet/page_inputs/__init__.py

@@ -7,5 +7,7 @@
     HttpResponseHeaders,
     HttpRequestBody,
     HttpResponseBody,
+    RequestUrl,
+    ResponseUrl
 )
 from .browser import BrowserHtml

web_poet/page_inputs/client.py

@@ -22,6 +22,7 @@
 )
 from web_poet.exceptions import RequestBackendError, HttpResponseError
 from web_poet.utils import as_list
+from web_poet._base import _Url
 
 logger = logging.getLogger(__name__)
 
@@ -72,12 +73,12 @@ def _handle_status(
             return
 
         status = HTTPStatus(response.status)
-        msg = f"{response.status} {status.name} response for {response.url}"
+        msg = f"{response.status} {status.name} response for {response.url!s}"
         raise HttpResponseError(msg, request=request, response=response)
 
     async def request(
         self,
-        url: str,
+        url: Union[str, _Url],
         *,
         method: str = "GET",
         headers: Optional[_Headers] = None,
@@ -115,7 +116,7 @@ async def request(
 
     async def get(
         self,
-        url: str,
+        url: Union[str, _Url],
         *,
         headers: Optional[_Headers] = None,
         allow_status: List[_Status] = None,
@@ -132,7 +133,7 @@ async def get(
 
     async def post(
         self,
-        url: str,
+        url: Union[str, _Url],
         *,
         headers: Optional[_Headers] = None,
         body: Optional[_Body] = None,

web_poet/page_inputs/http.py

@@ -9,7 +9,7 @@
     http_content_type_encoding
 )
 
-from web_poet._base import _HttpHeaders
+from web_poet._base import _HttpHeaders, _Url
 from web_poet.utils import memoizemethod_noargs
 from web_poet.mixins import SelectableMixin
 
@@ -18,6 +18,16 @@
 _AnyStrDict = Dict[AnyStr, Union[AnyStr, List[AnyStr], Tuple[AnyStr, ...]]]
 
 
+class ResponseUrl(_Url):
+    """ URL of the response """
+    pass
+
+
+class RequestUrl(_Url):
+    """ URL of the request """
+    pass
+
+
 class HttpRequestBody(bytes):
     """A container for holding the raw HTTP request body in bytes format."""
 
@@ -152,7 +162,7 @@ class HttpRequest:
     **web-poet** like :class:`~.HttpClient`.
     """
 
-    url: str = attrs.field()
+    url: RequestUrl = attrs.field(converter=RequestUrl)
     method: str = attrs.field(default="GET", kw_only=True)
     headers: HttpRequestHeaders = attrs.field(
         factory=HttpRequestHeaders, converter=HttpRequestHeaders, kw_only=True
@@ -185,7 +195,7 @@ class HttpResponse(SelectableMixin):
     is auto-detected from headers and body content.
     """
 
-    url: str = attrs.field()
+    url: ResponseUrl = attrs.field(converter=ResponseUrl)
     body: HttpResponseBody = attrs.field(converter=HttpResponseBody)
     status: Optional[int] = attrs.field(default=None, kw_only=True)
     headers: HttpResponseHeaders = attrs.field(factory=HttpResponseHeaders,