fix: handle path protocols correctly in string_iter()

multiaddr/transforms.py

@@ -145,8 +145,13 @@ def string_iter(
                 raise exceptions.StringParseError(
                     f"missing value for protocol: {proto_name}", string
                 )
-            value = parts[i + 1]
-            i += 1  # Skip the next part since we used it as value
+
+            if getattr(codec, "IS_PATH", False):
+                value = "/".join(parts[i + 1 :])
+                i = len(parts) - 1
+            else:
+                value = parts[i + 1]
+                i += 1  # Skip the next part since we used it as value
             logger.debug(f"[DEBUG string_iter] Using next part as value: {value}")
             yield proto, codec, value
         else:

newsfragments/112.bugfix

@@ -0,0 +1 @@
+Fix `string_iter` to correctly handle unix paths and other path protocols by consuming remaining components

tests/test_transforms.py

@@ -234,3 +234,13 @@ def test_codec_to_string_value_error(proto, buf):
 )
 def test_cid_autoconvert_to_string(proto, buf, expected):
     assert codec_by_name("cid").to_string(proto, buf) == expected
+
+
+def test_string_iter_unix_path():
+    from multiaddr.transforms import string_iter
+
+    parts = list(string_iter("/unix/var/run/docker.sock"))
+    assert len(parts) == 1
+    proto, _, value = parts[0]
+    assert proto.name == "unix"
+    assert value == "var/run/docker.sock"