Add Request.to_curl() as the inverse of Request.from_curl()

Closes #7743.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/topics/request-response.rst

@@ -257,6 +257,8 @@ Request objects
 
     .. automethod:: from_curl
 
+    .. automethod:: to_curl
+
     .. automethod:: to_dict
 
 

scrapy/http/request/__init__.py

@@ -381,6 +381,16 @@ class Request(object_ref):
         request_kwargs.update(kwargs)
         return cls(**request_kwargs)
 
+    def to_curl(self) -> str:
+        """Return a string with a cURL command equivalent to this request.
+
+        Inverse of :meth:`from_curl`. See also
+        :func:`scrapy.utils.request.request_to_curl`.
+        """
+        from scrapy.utils.request import request_to_curl
+
+        return request_to_curl(self)
+
     def to_dict(self, *, spider: scrapy.Spider | None = None) -> dict[str, Any]:
         """Return a dictionary containing the Request's data.
 

tests/test_http_request.py

@@ -406,6 +406,19 @@ class TestRequest:
         with pytest.raises(RuntimeError):
             NO_CALLBACK()
 
+    def test_to_curl(self):
+        request = self.request_class(
+            "https://www.httpbin.org/post",
+            method="POST",
+            headers={"Content-Type": "application/json"},
+            body='{"foo": "bar"}',
+        )
+        assert request.to_curl() == (
+            "curl -X POST https://www.httpbin.org/post"
+            ' --data-raw \'{"foo": "bar"}\''
+            " -H 'Content-Type: application/json'"
+        )
+
     def test_from_curl(self):
         # Note: more curated tests regarding curl conversion are in
         # `test_utils_curl.py`