regression-fix: retain httpx.URL type on request.url (#2359)

* fix: retain httpx.URL type on request.url

This fixes a regression caused in #2020 where request.url stopped being of `httpx.URL` type, causing issues with request/response hooks.

* Update CHANGELOG.md

* tests: adding assertions to verify request.url on hooks is a httpx.URL

* fixup: adjust check to consider httpx < 0.20.0

* fixup: keep code dry

---------

Co-authored-by: Diego Hurtado <ocelotl@users.noreply.github.com>
Co-authored-by: Leighton Chen <lechen@microsoft.com>
Co-authored-by: Srikanth Chekuri <srikanth.chekuri92@gmail.com>

CHANGELOG.md

@@ -19,6 +19,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#2297](https://github.com/open-telemetry/opentelemetry-python-contrib/issues/2297))
 - Ensure all http.server.duration metrics have the same description
   ([#2151](https://github.com/open-telemetry/opentelemetry-python-contrib/issues/2298))
+- Fix regression in httpx `request.url` not being of type `httpx.URL` after `0.44b0`
+  ([#2359](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2359))
 - Avoid losing repeated HTTP headers
   ([#2266](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2266))
 - `opentelemetry-instrumentation-elasticsearch` Don't send bulk request body as db statement

instrumentation/opentelemetry-instrumentation-httpx/src/opentelemetry/instrumentation/httpx/__init__.py

@@ -270,7 +270,7 @@ def _extract_parameters(args, kwargs):
         # In httpx >= 0.20.0, handle_request receives a Request object
         request: httpx.Request = args[0]
         method = request.method.encode()
-        url = remove_url_credentials(str(request.url))
+        url = httpx.URL(remove_url_credentials(str(request.url)))
         headers = request.headers
         stream = request.stream
         extensions = request.extensions

instrumentation/opentelemetry-instrumentation-httpx/tests/test_httpx_integration.py

@@ -51,12 +51,18 @@ if typing.TYPE_CHECKING:
 HTTP_RESPONSE_BODY = "http.response.body"
 
 
+def _is_url_tuple(request: "RequestInfo"):
+    """Determine if request url format is for httpx versions < 0.20.0."""
+    return isinstance(request[1], tuple) and len(request[1]) == 4
+
+
 def _async_call(coro: typing.Coroutine) -> asyncio.Task:
     loop = asyncio.get_event_loop()
     return loop.run_until_complete(coro)
 
 
 def _response_hook(span, request: "RequestInfo", response: "ResponseInfo"):
+    assert _is_url_tuple(request) or isinstance(request.url, httpx.URL)
     span.set_attribute(
         HTTP_RESPONSE_BODY,
         b"".join(response[2]),
@@ -66,6 +72,7 @@ def _response_hook(span, request: "RequestInfo", response: "ResponseInfo"):
 async def _async_response_hook(
     span: "Span", request: "RequestInfo", response: "ResponseInfo"
 ):
+    assert _is_url_tuple(request) or isinstance(request.url, httpx.URL)
     span.set_attribute(
         HTTP_RESPONSE_BODY,
         b"".join([part async for part in response[2]]),
@@ -73,11 +80,13 @@ async def _async_response_hook(
 
 
 def _request_hook(span: "Span", request: "RequestInfo"):
+    assert _is_url_tuple(request) or isinstance(request.url, httpx.URL)
     url = httpx.URL(request[1])
     span.update_name("GET" + str(url))
 
 
 async def _async_request_hook(span: "Span", request: "RequestInfo"):
+    assert _is_url_tuple(request) or isinstance(request.url, httpx.URL)
     url = httpx.URL(request[1])
     span.update_name("GET" + str(url))