add an example for flask in zip

README.md

@@ -93,6 +93,7 @@ Use REMOVE_BASE_PATH to remove the /orders prefix when routing requests to the a
 ## Examples
 
 - [Flask](examples/flask)
+- [Flask in Zip](examples/flask-zip)
 - [Express.js](examples/expressjs)
 - [Express.js in Zip](examples/expressjs-zip)
 - [Next.js](examples/nextjs)

examples/flask-zip/.gitignore

@@ -0,0 +1,246 @@
+
+.aws-sam
+
+# Created by https://www.gitignore.io/api/osx,linux,python,windows,pycharm,visualstudiocode
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### OSX ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### PyCharm ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/dictionaries
+
+# Sensitive or high-churn files:
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.xml
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+
+# Gradle:
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# CMake
+cmake-build-debug/
+
+# Mongo Explorer plugin:
+.idea/**/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Ruby plugin and RubyMine
+/.rakeTasks
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### PyCharm Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+.idea/sonarlint
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+.pytest_cache/
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule.*
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+.history
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# Build folder
+
+*/build/*
+
+# End of https://www.gitignore.io/api/osx,linux,python,windows,pycharm,visualstudiocode

examples/flask-zip/README.md

@@ -0,0 +1,30 @@
+# flask-zip
+
+This example shows how to use Lambda Adapter to run an Flask application on managed python runtime. 
+
+### How does it work?
+
+We add Lambda Adapter layer to the function and configure wrapper script. 
+
+1. attach Lambda Adapter layer to your function. This layer containers Lambda Adapter binary and a wrapper script. 
+    1. x86_64: `arn:aws:lambda:${AWS::Region}:753240598075:layer:LambdaAdapterLayerX86:6`
+    2. arm64: `arn:aws:lambda:${AWS::Region}:753240598075:layer:LambdaAdapterLayerArm64:6`
+2. configure Lambda environment variable `AWS_LAMBDA_EXEC_WRAPPER` to `/opt/bootstrap`. This is a wrapper script included in the layer.
+3. set function handler to a startup command: `run.sh`. The wrapper script will execute this command to boot up your application. 
+
+To get more information of Wrapper script, please read Lambda documentation [here](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-modify.html#runtime-wrapper). 
+
+### Build and Deploy
+
+Run the following commands to build and deploy the application to lambda. 
+
+```bash
+sam build --use-container
+sam deploy --guided
+```
+When the deployment completes, take note of FlaskApi's Value. It is the API Gateway endpoint URL. 
+
+### Verify it works
+
+Open FlaskApi's URL in a browser, you should see "hello world" on the page. 
+

examples/flask-zip/app/Makefile

@@ -0,0 +1,6 @@
+
+build-FlaskFunction:
+	cp *.py $(ARTIFACTS_DIR)
+	cp requirements.txt $(ARTIFACTS_DIR)
+	cp run.sh $(ARTIFACTS_DIR)
+	python -m pip install -r requirements.txt -t $(ARTIFACTS_DIR)

examples/flask-zip/app/app.py

@@ -0,0 +1,8 @@
+from flask import (Flask, jsonify)
+
+app = Flask(__name__)
+
+
+@app.route('/', methods=['GET', 'POST'])
+def hello():
+    return jsonify(status=200, message='hello world')

examples/flask-zip/app/requirements.txt

@@ -0,0 +1,7 @@
+click==8.0.1
+Flask==2.0.1
+gunicorn==20.1.0
+itsdangerous==2.0.1
+Jinja2==3.0.1
+MarkupSafe==2.0.1
+Werkzeug==2.0.1

examples/flask-zip/app/run.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+PATH=$PATH:$LAMBDA_TASK_ROOT/bin PYTHONPATH=$LAMBDA_TASK_ROOT exec gunicorn -b=:$PORT -w=1 app:app

examples/flask-zip/events/event.json

@@ -0,0 +1,63 @@
+{
+    "body": "{\"message\": \"hello world\"}",
+    "resource": "/{proxy+}",
+    "path": "/path/to/resource",
+    "httpMethod": "POST",
+    "isBase64Encoded": false,
+    "queryStringParameters": {
+      "foo": "bar"
+    },
+    "pathParameters": {
+      "proxy": "/path/to/resource"
+    },
+    "stageVariables": {
+      "baz": "qux"
+    },
+    "headers": {
+      "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
+      "Accept-Encoding": "gzip, deflate, sdch",
+      "Accept-Language": "en-US,en;q=0.8",
+      "Cache-Control": "max-age=0",
+      "CloudFront-Forwarded-Proto": "https",
+      "CloudFront-Is-Desktop-Viewer": "true",
+      "CloudFront-Is-Mobile-Viewer": "false",
+      "CloudFront-Is-SmartTV-Viewer": "false",
+      "CloudFront-Is-Tablet-Viewer": "false",
+      "CloudFront-Viewer-Country": "US",
+      "Host": "1234567890.execute-api.us-east-1.amazonaws.com",
+      "Upgrade-Insecure-Requests": "1",
+      "User-Agent": "Custom User Agent String",
+      "Via": "1.1 08f323deadbeefa7af34d5feb414ce27.cloudfront.net (CloudFront)",
+      "X-Amz-Cf-Id": "cDehVQoZnx43VYQb9j2-nvCh-9z396Uhbp027Y2JvkCPNLmGJHqlaA==",
+      "X-Forwarded-For": "127.0.0.1, 127.0.0.2",
+      "X-Forwarded-Port": "443",
+      "X-Forwarded-Proto": "https"
+    },
+    "requestContext": {
+      "accountId": "123456789012",
+      "resourceId": "123456",
+      "stage": "prod",
+      "requestId": "c6af9ac6-7b61-11e6-9a41-93e8deadbeef",
+      "requestTime": "09/Apr/2015:12:34:56 +0000",
+      "requestTimeEpoch": 1428582896000,
+      "identity": {
+        "cognitoIdentityPoolId": null,
+        "accountId": null,
+        "cognitoIdentityId": null,
+        "caller": null,
+        "accessKey": null,
+        "sourceIp": "127.0.0.1",
+        "cognitoAuthenticationType": null,
+        "cognitoAuthenticationProvider": null,
+        "userArn": null,
+        "userAgent": "Custom User Agent String",
+        "user": null
+      },
+      "path": "/prod/path/to/resource",
+      "resourcePath": "/{proxy+}",
+      "httpMethod": "POST",
+      "apiId": "1234567890",
+      "protocol": "HTTP/1.1"
+    }
+  }
+