new

.venv/lib/python3.9/site-packages/starlette/convertors.py

@@ -0,0 +1,81 @@
+import math
+import typing
+import uuid
+
+
+class Convertor:
+    regex = ""
+
+    def convert(self, value: str) -> typing.Any:
+        raise NotImplementedError()  # pragma: no cover
+
+    def to_string(self, value: typing.Any) -> str:
+        raise NotImplementedError()  # pragma: no cover
+
+
+class StringConvertor(Convertor):
+    regex = "[^/]+"
+
+    def convert(self, value: str) -> typing.Any:
+        return value
+
+    def to_string(self, value: typing.Any) -> str:
+        value = str(value)
+        assert "/" not in value, "May not contain path separators"
+        assert value, "Must not be empty"
+        return value
+
+
+class PathConvertor(Convertor):
+    regex = ".*"
+
+    def convert(self, value: str) -> typing.Any:
+        return str(value)
+
+    def to_string(self, value: typing.Any) -> str:
+        return str(value)
+
+
+class IntegerConvertor(Convertor):
+    regex = "[0-9]+"
+
+    def convert(self, value: str) -> typing.Any:
+        return int(value)
+
+    def to_string(self, value: typing.Any) -> str:
+        value = int(value)
+        assert value >= 0, "Negative integers are not supported"
+        return str(value)
+
+
+class FloatConvertor(Convertor):
+    regex = "[0-9]+(.[0-9]+)?"
+
+    def convert(self, value: str) -> typing.Any:
+        return float(value)
+
+    def to_string(self, value: typing.Any) -> str:
+        value = float(value)
+        assert value >= 0.0, "Negative floats are not supported"
+        assert not math.isnan(value), "NaN values are not supported"
+        assert not math.isinf(value), "Infinite values are not supported"
+        return ("%0.20f" % value).rstrip("0").rstrip(".")
+
+
+class UUIDConvertor(Convertor):
+    regex = "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}"
+
+    def convert(self, value: str) -> typing.Any:
+        return uuid.UUID(value)
+
+    def to_string(self, value: typing.Any) -> str:
+        return str(value)
+
+
+CONVERTOR_TYPES = {
+    "str": StringConvertor(),
+    "path": PathConvertor(),
+    "int": IntegerConvertor(),
+    "float": FloatConvertor(),
+    "uuid": UUIDConvertor(),
+}