From af17201fb531c84c0b3bd59917a243a400abfa83 Mon Sep 17 00:00:00 2001
From: Dan <daniel.h.funk@gmail.com>
Date: Thu, 10 Nov 2022 14:34:12 -0500
Subject: [PATCH] Barebones proxy system.

---
 .gitignore     |   3 +
 README.md      |  36 ++++
 app.py         |  18 ++
 poetry.lock    | 506 +++++++++++++++++++++++++++++++++++++++++++++++++
 pyproject.toml |  24 +++
 5 files changed, 587 insertions(+)
 create mode 100644 app.py
 create mode 100644 poetry.lock
 create mode 100644 pyproject.toml

diff --git a/.gitignore b/.gitignore
index b6e4761..85cfcad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -127,3 +127,6 @@ dmypy.json
 
 # Pyre type checker
 .pyre/
+
+# Intellij
+.idea/
\ No newline at end of file
diff --git a/README.md b/README.md
index 45cb10a..beaebab 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,38 @@
 # connector-proxy-demo
 A Spiff-Connector for demonstration purposes - shows how to build connectors to some common 3rd party systems. 
+
+# How to create a Connector Proxy for SpiffWorklow
+
+## Step 1. Create a python project with a few dependencies:
+Create a bare-bones Flask application that depends on the core spiffworkflow-proxy (a flask blueprint)
+and any connector dependencies you wish to use.
+We will hopefully be adding a number of available connectors in the future.  Please checkout the connector-aws repository for an example of how to create connections to new services.  
+``` python
+  python = "^3.11"
+  Flask = "^2.2.2"
+  spiffworkflow-proxy = {git = "https://github.com/sartography/spiffworkflow-proxy"}
+  connector-aws = { git = "https://github.com/sartography/connector-aws.git"}
+```
+
+## Step 2.
+Create a basic Flask Application that uses the SpiffWorkflow Proxy's Flask Blueprint
+```python
+import os
+from spiffworkflow_proxy.blueprint import proxy_blueprint
+from flask import Flask
+
+app = Flask(__name__)
+app.config.from_pyfile("config.py", silent=True)
+app.register_blueprint(proxy_blueprint)
+if __name__ == "__main__":
+    app.run(host="localhost", port=5000)
+```
+
+## Step 3.
+Fire it up.  
+```bash
+#> flask run
+```
+
+Any dependencies you add will now be available for SpiffWorkflow to call using a Service Task.  What's more, those services are now discoverable!  So when someone drops a Service Task into their diagram, they will have a dropdown list of all the services you have made available to them.  And those services will know what paramters are required, and can prompt diagram authors to provide information necissary to make the call.  Which can be no parmaeters at all (Just give me a fact about Chuck Norris) .. to complex parameters (a json structure to be added to a DynamoDB Table).
+
diff --git a/app.py b/app.py
new file mode 100644
index 0000000..8b2cff7
--- /dev/null
+++ b/app.py
@@ -0,0 +1,18 @@
+import os
+
+from spiffworkflow_proxy.blueprint import proxy_blueprint
+from flask import Flask
+
+app = Flask(__name__)
+app.config.from_pyfile("config.py", silent=True)
+
+if app.config["ENV"] != "production":
+    os.environ["OAUTHLIB_INSECURE_TRANSPORT"] = "1"
+
+# Use the SpiffConnector Blueprint, which will auto-discover any
+# connector-* packages and provide API endpoints for listing and executing
+# available services.
+app.register_blueprint(proxy_blueprint)
+
+if __name__ == "__main__":
+    app.run(host="localhost", port=5000)
\ No newline at end of file
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..9147d03
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,506 @@
+[[package]]
+name = "boto3"
+version = "1.26.6"
+description = "The AWS SDK for Python"
+category = "main"
+optional = false
+python-versions = ">= 3.7"
+
+[package.dependencies]
+botocore = ">=1.29.6,<1.30.0"
+jmespath = ">=0.7.1,<2.0.0"
+s3transfer = ">=0.6.0,<0.7.0"
+
+[package.extras]
+crt = ["botocore[crt] (>=1.21.0,<2.0a0)"]
+
+[[package]]
+name = "botocore"
+version = "1.29.6"
+description = "Low-level, data-driven core of boto 3."
+category = "main"
+optional = false
+python-versions = ">= 3.7"
+
+[package.dependencies]
+jmespath = ">=0.7.1,<2.0.0"
+python-dateutil = ">=2.1,<3.0.0"
+urllib3 = ">=1.25.4,<1.27"
+
+[package.extras]
+crt = ["awscrt (==0.14.0)"]
+
+[[package]]
+name = "cachelib"
+version = "0.9.0"
+description = "A collection of cache libraries in the same API interface."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "certifi"
+version = "2022.9.24"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "charset-normalizer"
+version = "2.1.1"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
+category = "main"
+optional = false
+python-versions = ">=3.6.0"
+
+[package.extras]
+unicode_backport = ["unicodedata2"]
+
+[[package]]
+name = "click"
+version = "8.1.3"
+description = "Composable command line interface toolkit"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+colorama = {version = "*", markers = "platform_system == \"Windows\""}
+
+[[package]]
+name = "colorama"
+version = "0.4.6"
+description = "Cross-platform colored terminal text."
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+
+[[package]]
+name = "connector-aws"
+version = "0.1.0"
+description = "Connect Service Tasks to AWS web services."
+category = "main"
+optional = false
+python-versions = "^3.10"
+develop = false
+
+[package.dependencies]
+boto3 = "^1.26.5"
+simplejson = "^3.17.6"
+
+[package.source]
+type = "git"
+url = "https://github.com/sartography/connector-aws.git"
+reference = "HEAD"
+resolved_reference = "ad386286bcc72eeb000b9b053596dfee40f7c6b5"
+
+[[package]]
+name = "Flask"
+version = "2.2.2"
+description = "A simple framework for building complex web applications."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+click = ">=8.0"
+itsdangerous = ">=2.0"
+Jinja2 = ">=3.0"
+Werkzeug = ">=2.2.2"
+
+[package.extras]
+async = ["asgiref (>=3.2)"]
+dotenv = ["python-dotenv"]
+
+[[package]]
+name = "Flask-OAuthlib"
+version = "0.9.6"
+description = "OAuthlib for Flask"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+cachelib = "*"
+Flask = "*"
+oauthlib = ">=1.1.2,<2.0.3 || >2.0.3,<2.0.4 || >2.0.4,<2.0.5 || >2.0.5,<3.0.0"
+requests-oauthlib = ">=0.6.2,<1.2.0"
+
+[[package]]
+name = "idna"
+version = "3.4"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "itsdangerous"
+version = "2.1.2"
+description = "Safely pass data to untrusted environments and back."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "Jinja2"
+version = "3.1.2"
+description = "A very fast and expressive template engine."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+MarkupSafe = ">=2.0"
+
+[package.extras]
+i18n = ["Babel (>=2.7)"]
+
+[[package]]
+name = "jmespath"
+version = "1.0.1"
+description = "JSON Matching Expressions"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "MarkupSafe"
+version = "2.1.1"
+description = "Safely add untrusted strings to HTML/XML markup."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "oauthlib"
+version = "2.1.0"
+description = "A generic, spec-compliant, thorough implementation of the OAuth request-signing logic"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.extras]
+rsa = ["cryptography"]
+signals = ["blinker"]
+signedtoken = ["cryptography", "pyjwt (>=1.0.0)"]
+test = ["blinker", "cryptography", "mock", "nose", "pyjwt (>=1.0.0)", "unittest2"]
+
+[[package]]
+name = "python-dateutil"
+version = "2.8.2"
+description = "Extensions to the standard Python datetime module"
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+
+[package.dependencies]
+six = ">=1.5"
+
+[[package]]
+name = "requests"
+version = "2.28.1"
+description = "Python HTTP for Humans."
+category = "main"
+optional = false
+python-versions = ">=3.7, <4"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+charset-normalizer = ">=2,<3"
+idna = ">=2.5,<4"
+urllib3 = ">=1.21.1,<1.27"
+
+[package.extras]
+socks = ["PySocks (>=1.5.6,!=1.5.7)"]
+use_chardet_on_py3 = ["chardet (>=3.0.2,<6)"]
+
+[[package]]
+name = "requests-oauthlib"
+version = "1.1.0"
+description = "OAuthlib authentication support for Requests."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+oauthlib = ">=2.1.0,<3.0.0"
+requests = ">=2.0.0"
+
+[package.extras]
+rsa = ["oauthlib[signedtoken] (>=2.1.0,<3.0.0)"]
+
+[[package]]
+name = "s3transfer"
+version = "0.6.0"
+description = "An Amazon S3 Transfer Manager"
+category = "main"
+optional = false
+python-versions = ">= 3.7"
+
+[package.dependencies]
+botocore = ">=1.12.36,<2.0a.0"
+
+[package.extras]
+crt = ["botocore[crt] (>=1.20.29,<2.0a.0)"]
+
+[[package]]
+name = "simplejson"
+version = "3.17.6"
+description = "Simple, fast, extensible JSON encoder/decoder for Python"
+category = "main"
+optional = false
+python-versions = ">=2.5, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "spiffworkflow-proxy"
+version = "0.1.0"
+description = "A blueprint that can allow (and limit) SpiffWorkflow's Service Tasks access to an organizations API's, such as connections to AWS Services and existing applications."
+category = "main"
+optional = false
+python-versions = "^3.10"
+develop = false
+
+[package.dependencies]
+Flask = "^2.2"
+Flask-OAuthlib = "^0.9.6"
+
+[package.source]
+type = "git"
+url = "https://github.com/sartography/spiffworkflow-proxy"
+reference = "HEAD"
+resolved_reference = "5e4926030cf6f2808ddb8e65527168dd914e5fc3"
+
+[[package]]
+name = "urllib3"
+version = "1.26.12"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*, <4"
+
+[package.extras]
+brotli = ["brotli (>=1.0.9)", "brotlicffi (>=0.8.0)", "brotlipy (>=0.6.0)"]
+secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "ipaddress", "pyOpenSSL (>=0.14)", "urllib3-secure-extra"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+
+[[package]]
+name = "Werkzeug"
+version = "2.2.2"
+description = "The comprehensive WSGI web application library."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+MarkupSafe = ">=2.1.1"
+
+[package.extras]
+watchdog = ["watchdog"]
+
+[metadata]
+lock-version = "1.1"
+python-versions = "^3.10"
+content-hash = "86cf682d49dc495c8cf6dc60a8aedc31ad32a293e6ceaf7b1428e0c232f8319e"
+
+[metadata.files]
+boto3 = [
+    {file = "boto3-1.26.6-py3-none-any.whl", hash = "sha256:2bd7d3e8362f0e0d84fe4c3a06f1bd46fd2dbedbea76ac24e89f28439837a9e7"},
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+cachelib = [
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+connector-aws = []
+Flask = [
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+    {file = "idna-3.4.tar.gz", hash = "sha256:814f528e8dead7d329833b91c5faa87d60bf71824cd12a7530b5526063d02cb4"},
+]
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+    {file = "simplejson-3.17.6-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:a649d0f66029c7eb67042b15374bd93a26aae202591d9afd71e111dd0006b198"},
+    {file = "simplejson-3.17.6-cp39-cp39-win32.whl", hash = "sha256:522fad7be85de57430d6d287c4b635813932946ebf41b913fe7e880d154ade2e"},
+    {file = "simplejson-3.17.6-cp39-cp39-win_amd64.whl", hash = "sha256:3fe87570168b2ae018391e2b43fbf66e8593a86feccb4b0500d134c998983ccc"},
+    {file = "simplejson-3.17.6.tar.gz", hash = "sha256:cf98038d2abf63a1ada5730e91e84c642ba6c225b0198c3684151b1f80c5f8a6"},
+]
+six = [
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
+]
+spiffworkflow-proxy = []
+urllib3 = [
+    {file = "urllib3-1.26.12-py2.py3-none-any.whl", hash = "sha256:b930dd878d5a8afb066a637fbb35144fe7901e3b209d1cd4f524bd0e9deee997"},
+    {file = "urllib3-1.26.12.tar.gz", hash = "sha256:3fa96cf423e6987997fc326ae8df396db2a8b7c667747d47ddd8ecba91f4a74e"},
+]
+Werkzeug = [
+    {file = "Werkzeug-2.2.2-py3-none-any.whl", hash = "sha256:f979ab81f58d7318e064e99c4506445d60135ac5cd2e177a2de0089bfd4c9bd5"},
+    {file = "Werkzeug-2.2.2.tar.gz", hash = "sha256:7ea2d48322cc7c0f8b3a215ed73eabd7b5d75d0b50e31ab006286ccff9e00b8f"},
+]
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..9a6f51f
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,24 @@
+[tool.poetry]
+name = "connector-proxy-demo"
+version = "0.1.0"
+description = "An example showing how to use the Spiffworkflow-proxy's Flask Blueprint to make services available to Service Tasks."
+authors = ["Dan <dan@sartography.com>"]
+license = "LGPL"
+readme = "README.md"
+packages = [{include = "connector_proxy_demo", from = "src"}]
+
+[tool.poetry.dependencies]
+python = "^3.10"
+Flask = "^2.2.2"
+spiffworkflow-proxy = {git = "https://github.com/sartography/spiffworkflow-proxy"}
+connector-aws = { git = "https://github.com/sartography/connector-aws.git"}
+
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.pytest.ini_options]
+pythonpath = [
+  ".", "src",
+]
\ No newline at end of file