added flask example finally

flask example uploads a file using curl command

Author: James Campbell

.gitignore

@@ -9,6 +9,9 @@ __pycache__/
 # C extensions
 *.so
 
+# paths created
+flaskme/
+
 # Distribution / packaging
 .Python
 env/

assets/archive_name.tar.gz

@@ -5,5 +5,41 @@
 What is this code: An example Flask connection
 Why?: For me to remember later
 """
+import os
+from flask import jsonify
+from http import HTTPStatus
 
+from flask import Flask, request
+from werkzeug.utils import secure_filename
+
+app = Flask(__name__)
+
+ALLOWED_EXTENSIONS = ['zip', 'gz', 'bz2']
+
+def allowed_filename(filename: str) -> bool:
+    return '.' in filename and filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS
+
+@app.route('/upload', methods=['POST'])
+def upload_csv() -> str:
+    submitted_file = request.files['file']
+    if submitted_file and allowed_filename(submitted_file.filename):
+        filename = secure_filename(submitted_file.filename)
+        directory = os.path.join(app.config['UPLOAD_FOLDER'])
+        if not os.path.exists(directory):
+            os.mkdir(directory)
+        basedir = os.path.abspath(os.path.dirname(__file__))
+        submitted_file.save(os.path.join(basedir,app.config['UPLOAD_FOLDER'], filename))
+        out = {
+            'status': HTTPStatus.OK,
+            'filename': filename,
+            'message': f"{filename} saved successful."
+            }
+        return jsonify(out)
+
+if __name__=="__main__":
+    app.config['UPLOAD_FOLDER'] = "flaskme/"
+    app.run(port=6969, debug=True)
+
+# run curl http://localhost:6969
+# run curl -X POST -F file=@"/path/to/my/file/test.txt" http://localhost:6969/print_filename