enforce required arguments, fixes #72

tests/addressbook.thrift

@@ -34,7 +34,7 @@ exception PersonNotExistsError {
 
 service AddressBookService {
     void ping();
-    string hello(1: string name);
+    string hello(1: required string name);
     bool add(1: Person person);
     bool remove(1: string name) throws (1: PersonNotExistsError not_exists);
     Person get(1: string name) throws (1: PersonNotExistsError not_exists);

tests/test_aio.py

@@ -16,6 +16,7 @@
 
 from thriftpy2.rpc import make_aio_server, make_aio_client  # noqa
 from thriftpy2.transport import TTransportException  # noqa
+from thriftpy2.thrift import TApplicationException  # noqa
 
 addressbook = thriftpy2.load(os.path.join(os.path.dirname(__file__),
                                           "addressbook.thrift"))
@@ -164,6 +165,16 @@ async def test_string_api(aio_server):
     c.close()
 
 
+@pytest.mark.asyncio
+async def test_required_argument(aio_server):
+    c = await client()
+    assert await c.hello("") == "hello "
+
+    with pytest.raises(TApplicationException):
+        await c.hello()
+    c.close()
+
+
 @pytest.mark.asyncio
 async def test_string_api_with_ssl(aio_ssl_server):
     c = await client()

tests/test_http.py

@@ -13,6 +13,7 @@
 thriftpy2.install_import_hook()  # noqa
 
 from thriftpy2.http import make_server, client_context
+from thriftpy2.thrift import TApplicationException
 
 
 addressbook = thriftpy2.load(os.path.join(os.path.dirname(__file__),
@@ -115,6 +116,14 @@ def test_string_api(server):
         assert c.hello("world") == "hello world"
 
 
+def test_required_argument(server):
+    with client() as c:
+        with pytest.raises(TApplicationException):
+            c.hello()
+
+        assert c.hello(name="") == "hello "
+
+
 def test_huge_res(server):
     with client() as c:
         big_str = "world" * 100000

tests/test_rpc.py

@@ -17,6 +17,7 @@
 from thriftpy2._compat import PY3  # noqa
 from thriftpy2.rpc import make_server, client_context  # noqa
 from thriftpy2.transport import TTransportException  # noqa
+from thriftpy2.thrift import TApplicationException  # noqa
 
 
 addressbook = thriftpy2.load(os.path.join(os.path.dirname(__file__),
@@ -158,6 +159,13 @@ def test_string_api(server):
         assert c.hello("world") == "hello world"
 
 
+def test_required_argument(server):
+    with client() as c:
+        assert c.hello("") == "hello "
+        with pytest.raises(TApplicationException):
+            c.hello()
+
+
 def test_string_api_with_ssl(ssl_server):
     with ssl_client() as c:
         assert c.hello("world") == "hello world"

thriftpy2/contrib/aio/client.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 import asyncio
 import functools
-from thriftpy2.thrift import args2kwargs
+from thriftpy2.thrift import args_to_kwargs
 from thriftpy2.thrift import TApplicationException, TMessageType
 
 
@@ -26,9 +26,14 @@ def __dir__(self):
 
     @asyncio.coroutine
     def _req(self, _api, *args, **kwargs):
-        _kw = args2kwargs(getattr(self._service, _api + "_args").thrift_spec,
-                          *args)
-        kwargs.update(_kw)
+        try:
+            kwargs = args_to_kwargs(getattr(self._service, _api + "_args").thrift_spec,
+                          *args, **kwargs)
+        except ValueError as e:
+            raise TApplicationException(
+                    TApplicationException.UNKNOWN_METHOD,
+                    'missing required argument {arg} for {service}.{api}'.format(
+                        arg=e.args[0], service=self._service.__name__, api=_api))
         result_cls = getattr(self._service, _api + "_result")
 
         yield from self._send(_api, **kwargs)

thriftpy2/thrift.py

@@ -13,12 +13,22 @@
 import linecache
 import types
 
-from ._compat import with_metaclass
+from ._compat import with_metaclass, PY3
+if PY3:
+    from itertools import zip_longest
+else:
+    from itertools import izip_longest as zip_longest
 
 
-def args2kwargs(thrift_spec, *args):
-    arg_names = [item[1][1] for item in sorted(thrift_spec.items())]
-    return dict(zip(arg_names, args))
+def args_to_kwargs(thrift_spec, *args, **kwargs):
+    for item, value in zip_longest(sorted(thrift_spec.items()), args):
+        arg_name = item[1][1]
+        required = item[1][-1]
+        if value is not None:
+            kwargs[item[1][1]] = value
+        if required and arg_name not in kwargs:
+            raise ValueError(arg_name)
+    return kwargs
 
 
 def parse_spec(ttype, spec=None):
@@ -192,9 +202,15 @@ def __dir__(self):
         return self._service.thrift_services
 
     def _req(self, _api, *args, **kwargs):
-        _kw = args2kwargs(getattr(self._service, _api + "_args").thrift_spec,
-                          *args)
-        kwargs.update(_kw)
+        try:
+            kwargs = args_to_kwargs(getattr(self._service, _api + "_args").thrift_spec,
+                          *args, **kwargs)
+        except ValueError as e:
+            raise TApplicationException(
+                    TApplicationException.UNKNOWN_METHOD,
+                    '{arg} is required argument for {service}.{api}'.format(
+                        arg=e.args[0], service=self._service.__name__, api=_api))
+
         result_cls = getattr(self._service, _api + "_result")
 
         self._send(_api, **kwargs)