Add condition to check for secret key and return correct uri

Author: kclowes

.circleci/config.yml

@@ -181,7 +181,6 @@ jobs:
       TOXENV: py36-ethpm
       # Please don't use this key for any shenanigans
       WEB3_INFURA_PROJECT_ID: 7707850c2fb7465ebe6f150d67182e22
-      WEB3_INFURA_API_SECRET: 1955838f22ac4d858434f41498557130
 
   py36-integration-goethereum-ipc-1.7.2:
     <<: *geth_steps
@@ -290,7 +289,6 @@ jobs:
       TOXENV: py37-ethpm
       # Please don't use this key for any shenanigans
       WEB3_INFURA_PROJECT_ID: 7707850c2fb7465ebe6f150d67182e22
-      WEB3_INFURA_API_SECRET: 1955838f22ac4d858434f41498557130
 
   py37-integration-goethereum-ipc-1.7.2:
     <<: *geth_steps
@@ -399,7 +397,6 @@ jobs:
       TOXENV: py38-ethpm
       # Please don't use this key for any shenanigans
       WEB3_INFURA_PROJECT_ID: 7707850c2fb7465ebe6f150d67182e22
-      WEB3_INFURA_API_SECRET: 1955838f22ac4d858434f41498557130
 
   py38-integration-goethereum-ipc-1.7.2:
     <<: *geth_steps

tests/core/providers/test_auto_provider.py

@@ -139,6 +139,17 @@ def test_web3_auto_infura_websocket_with_secret(monkeypatch, caplog, environ_nam
     assert getattr(w3.provider, 'endpoint_uri') == expected_url
 
 
+def test_web3_auto_infura_websocket_without_secret(monkeypatch):
+    monkeypatch.setenv('WEB3_INFURA_PROJECT_ID', 'test')
+
+    importlib.reload(infura)
+
+    w3 = infura.w3
+    assert isinstance(w3.provider, WebsocketProvider)
+    expected_url = 'wss://%s/ws/v3/test' % (infura.INFURA_MAINNET_DOMAIN)
+    assert getattr(w3.provider, 'endpoint_uri') == expected_url
+
+
 @pytest.mark.parametrize('environ_name', ['WEB3_INFURA_API_KEY', 'WEB3_INFURA_PROJECT_ID'])
 def test_web3_auto_infura_with_secret(monkeypatch, caplog, environ_name):
     monkeypatch.setenv('WEB3_INFURA_SCHEME', 'https')

web3/auto/infura/endpoints.py

@@ -46,8 +46,10 @@ def build_infura_url(domain):
     key = load_api_key()
     secret = load_secret()
 
-    if scheme == WEBSOCKET_SCHEME:
+    if scheme == WEBSOCKET_SCHEME and secret != '':
         return "%s://:%s@%s/ws/v3/%s" % (scheme, secret, domain, key)
+    elif scheme == WEBSOCKET_SCHEME and secret == '':
+        return "%s://%s/ws/v3/%s" % (scheme, domain, key)
     elif scheme == HTTP_SCHEME:
         return "%s://%s/v3/%s" % (scheme, domain, key)
     else: