Initial Python version

Author: lyndsysimon

.gitignore

@@ -1 +1,8 @@
+# Node.js
 node_modules
+
+# Python
+*.py[cod]
+*.egg-info/
+.eggs/
+.tox/

python/Pipfile

@@ -0,0 +1,15 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+tox = "*"
+pytest = "*"
+responses = "*"
+
+[packages]
+requests = "*"
+
+[requires]
+python_version = "3.7"

python/Pipfile.lock

@@ -1,13 +1,14 @@
 # sdk:python
 
+## Usage
+
 ```python
-from pipedream import sdk as pd
+from pipedream_sdk import send_event
 
-pd.send_event(API_KEY, {'hello': 'world'})
+send_event({'hello': 'world'})
 
 # with exports
-pd.send_event(
-    API_KEY,
+send_event(
     {'hello': 'world'},
     exports={
         'event': {'hello': 'world!'},
@@ -16,9 +17,23 @@ pd.send_event(
 )
 ```
 
-If you do not provide an `event` export it will be set to the `raw_event`
-(first argument).  `event` and `raw_event` MUST be a dict or the SDK request
-will be invalid.
+Importing `send_event` directly will create an instance of `PipedreamSdkClient`
+behind the scenes, configured through environment variables. You may also create
+the client explicitly:
+
+```python
+from pipedream_sdk import PipedreamSdkClient
+
+pd = PipedreamSdkClient(
+    api_key=YOUR_API_KEY,
+    sdk_protocol='https',
+)
+pd.send_event({'hello': 'world'})
+```
+
+This may be useful in cases where multiple events need to be pushed to Pipedream
+using differing API keys, or where some events should be sent as over HTTPS while
+others should be sent without SSL.
 
 ## Development
 

python/README.md

@@ -0,0 +1,16 @@
+from .client import PipedreamSdkClient
+
+
+_CLIENT = None
+
+
+def _get_client():
+    global _CLIENT
+
+    if _CLIENT is None:
+        _CLIENT = PipedreamSdkClient()
+    return _CLIENT
+
+
+def send_event(*args, **kwargs):
+    _get_client().send_event(*args, **Jkwargs)

python/pipedream_sdk/__init__.py

@@ -0,0 +1 @@
+version = '0.0.1dev0'

python/pipedream_sdk/about.py

@@ -0,0 +1,62 @@
+import hashlib
+import json
+import os
+
+import requests
+
+from .about import version
+
+
+class PipedreamSdkClient:
+    def __init__(self, api_key=None, api_secret=None, sdk_host=None, sdk_protocol=None):
+        self._sdk_version = '0.3.0'
+        self._api_key = api_key or os.getenv('PD_SDK_API_KEY')
+        self._api_secret = api_secret or os.getenv('PD_SDK_SECRET_KEY')
+        self._sdk_host = (
+            sdk_host
+            or os.getenv('PD_SDK_HOST')
+            or 'sdk.m.pipedream.net'
+        )
+        self._sdk_protocol = (
+            sdk_protocol
+            or os.getenv('PD_SDK_PROTO')
+            or 'https'
+        )
+
+    def send_event(self, raw_event, exports=None, deployment=None):
+        """Send an event to the PipedreamHQ SDK
+
+        :return: None
+        """
+        # Manually create the payload so a signature can be generated
+        event = {'raw_event': raw_event}
+        data = json.dumps(event)
+        headers = {
+            'content-type': 'application/json',
+            'user-agent': f'pipedream-sdk:python/{version}',
+            'x-pd-sdk-version': self._sdk_version,
+        }
+
+        if self._api_secret:
+            headers['x-pd-sig'] = self._sign(data)
+        # TODO: warn if no secret is present
+
+        #TODO: raise exception if POST fails
+        response = requests.post(self._request_uri(deployment), data=data, headers=headers)
+
+    def _request_uri(self, deployment):
+        uri_parts = [
+            f'{self._sdk_protocol}://{self._sdk_host}',
+            'pipelines',
+            self._api_key,
+        ]
+        if deployment:
+            uri_parts += ['deployments', deployment]
+        uri_parts.append('events')
+        return '/'.join(uri_parts)
+
+    def _sign(self, data):
+        sig = hashlib.sha256(self._api_secret.encode('utf-8'))
+        sig.update(data.encode('utf-8'))
+        return sig.hexdigest()
+

python/pipedream_sdk/client.py

@@ -0,0 +1,8 @@
+import os
+
+client_version = '0.0.1dev0'
+
+sdk_version = '0.3.0'
+hostname = os.getenv('PD_SDK_HOST') or 'sdk.m.pipedream.net'
+protocol = os.getenv('PD_SDK_PROTO') or 'https'
+user_agent = f'pipedream-sdk:python/{client_version}'