Errors removed and python3 updated

.gitignore

@@ -0,0 +1,7 @@
+__pycache__/
+raw_data/
+restored_file/
+encrypted/
+files/
+key/
+uploads/

README.md

@@ -5,6 +5,7 @@
 # Methodology
 
 To achieve the above goal, the following methodology needs to be followed:</br>
+
 1. Load the file on the server.</br>
 2. Dividing the uploaded file into N parts.</br>
 3. Encrypting all the parts of the file using any one of the selected algorithms (Algorithm is changed with every part in round robin fashion).</br>
@@ -13,27 +14,28 @@ To achieve the above goal, the following methodology needs to be followed:</br>
 After the above 4 steps you will have a N files which are in encrypted form which are stored on the server and a key which is downloaded as public key for decrypting the file and downloading it.</br>
 
 To restore the file, follow the following steps:</br>
+
 1. Load the key on the server.</br>
 2. Decrypt the keys of the algorithms.</br>
 3. Decrypt all the N parts of the file using the same algorithms which were used to encrypt them.</br>
 4. Combine all the N parts to form the original file and provide it to the user for downloading.</br>
 
 # How to Run
 
-**NOTE:** The project is based on Python 2.7.15 plateform running it on any other plateform might create some issues.</br>
+**NOTE:** The project is based on Python 3.8.10 platform running it on any other platform might create some issues.</br>
 
 Step 1: Install Requirements</br>
 `pip install -r requirements.txt`</br>
 
 Step 2: Run the application</br>
-`python app.py`</br>
+`python3 app.py`</br>
 
 Step 3: Visit the localhost from your browser</br>
 
 Step 4: Enjoy :)
- 
-[//]: <> (*IF YOU ENCOUNTER ANY BUGS OR FOR ANY SUGGESTIONS REGARDING THE IMPROVEMENT OF THE PROJECT FEEL FREE TO CONTACT ME :**)
+
+[//]: <> (\*IF YOU ENCOUNTER ANY BUGS OR FOR ANY SUGGESTIONS REGARDING THE IMPROVEMENT OF THE PROJECT FEEL FREE TO CONTACT ME :\*\*)
 
 **THE PROJECT HAS ENCOUNTERED A BUG BECAUSE OF THE CRYPTOGRAPHY LIBRARY BEING UPDATED. IF YOU ARE INTRESTED IN COLLABORATING TO IMPROVE THIS PROJECT FEEL FREE TO CONTACT ME :**
 
-Shivang Srivastava	-	[email protected]<br/>
+Shivang Srivastava - [email protected]<br/>

app.py

@@ -1,5 +1,5 @@
 import os
-from flask import Flask, request, redirect, url_for, render_template, send_from_directory, send_file
+from flask import Flask, request, redirect, url_for, render_template, send_from_directory, send_file, flash
 from werkzeug.utils import secure_filename
 import tools
 import divider as dv
@@ -17,95 +17,109 @@
 
 #port = int(os.getenv('PORT', 8000))
 
+
 def allowed_file(filename):
-	return '.' in filename and \
-		filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
+    return '.' in filename and \
+        filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
+
 
 def start_encryption():
-	dv.divide()
-	tools.empty_folder('uploads')
-	enc.encrypter()
-	return render_template('success.html')
+    dv.divide()
+    tools.empty_folder('uploads')
+    enc.encrypter()
+    return render_template('success.html')
+
 
 def start_decryption():
-	dec.decrypter()
-	tools.empty_folder('key')
-	rst.restore()
-	return render_template('restore_success.html')
+    dec.decrypter()
+    tools.empty_folder('key')
+    rst.restore()
+    return render_template('restore_success.html')
+
 
-@app.route('/return-key/My_Key.pem')
+@app.route('/return-key')
 def return_key():
-	list_directory = tools.list_dir('key')
-	filename = './key/' + list_directory[0]
-	return send_file(filename, attachment_filename='My_Key.pem')
+    print("reached")
+    list_directory = tools.list_dir('key')
+    filename = './key/' + list_directory[0]
+    print(filename)
+    return send_file(filename, attachment_filename="My_Key.pem", as_attachment=True, cache_timeout=0)
+
 
 @app.route('/return-file/')
 def return_file():
-	list_directory = tools.list_dir('restored_file')
-	filename = './restored_file/' + list_directory[0]
-	print "****************************************"
-	print list_directory[0]
-	print "****************************************"
-	return send_file(filename, attachment_filename=list_directory[0], as_attachment=True)
+    list_directory = tools.list_dir('restored_file')
+    filename = './restored_file/' + list_directory[0]
+    print("****************************************")
+    print(list_directory[0])
+    print("****************************************")
+    return send_file(filename, attachment_filename=list_directory[0], as_attachment=True, cache_timeout=0)
+
 
 @app.route('/download/')
 def downloads():
-	return render_template('download.html')
+    return render_template('download.html')
+
 
 @app.route('/upload')
 def call_page_upload():
-	return render_template('upload.html')
+    return render_template('upload.html')
+
 
 @app.route('/home')
 def back_home():
-	tools.empty_folder('key')
-	tools.empty_folder('restored_file')
-	return render_template('index.html')
+    tools.empty_folder('key')
+    tools.empty_folder('restored_file')
+    return render_template('index.html')
+
 
 @app.route('/')
 def index():
-	return render_template('index.html')
+    return render_template('index.html')
+
 
 @app.route('/data', methods=['GET', 'POST'])
 def upload_file():
-	tools.empty_folder('uploads')
-	if request.method == 'POST':
-		# check if the post request has the file part
-		if 'file' not in request.files:
-			flash('No file part')
-			return redirect(request.url)
-		file = request.files['file']
-		# if user does not select file, browser also
-		# submit a empty part without filename
-		if file.filename == '':
-			flash('No selected file')
-			return 'NO FILE SELECTED'
-		if file:
-			filename = secure_filename(file.filename)
-			file.save(os.path.join(app.config['UPLOAD_FOLDER'], file.filename))
-			return start_encryption()
-		return 'Invalid File Format !'
-
+    tools.empty_folder('uploads')
+    if request.method == 'POST':
+        # check if the post request has the file part
+        if 'file' not in request.files:
+            flash('No file part')
+            return redirect(request.url)
+        file = request.files['file']
+        # if user does not select file, browser also
+        # submit a empty part without filename
+        if file.filename == '':
+            flash('No selected file')
+            return 'NO FILE SELECTED'
+        if file:
+            filename = secure_filename(file.filename)
+            file.save(os.path.join(app.config['UPLOAD_FOLDER'], file.filename))
+            return start_encryption()
+        return 'Invalid File Format !'
+
+
 @app.route('/download_data', methods=['GET', 'POST'])
 def upload_key():
-	tools.empty_folder('key')
-	if request.method == 'POST':
-		# check if the post request has the file part
-		if 'file' not in request.files:
-			flash('No file part')
-			return redirect(request.url)
-		file = request.files['file']
-		# if user does not select file, browser also
-		# submit a empty part without filename
-		if file.filename == '':
-			flash('No selected file')
-			return 'NO FILE SELECTED'
-		if file and allowed_file(file.filename):
-			filename = secure_filename(file.filename)
-			file.save(os.path.join(app.config['UPLOAD_KEY'], file.filename))
-			return start_decryption()
-		return 'Invalid File Format !'
+    tools.empty_folder('key')
+    if request.method == 'POST':
+        # check if the post request has the file part
+        if 'file' not in request.files:
+            flash('No file part')
+            return redirect(request.url)
+        file = request.files['file']
+        # if user does not select file, browser also
+        # submit a empty part without filename
+        if file.filename == '':
+            flash('No selected file')
+            return 'NO FILE SELECTED'
+        if file and allowed_file(file.filename):
+            filename = secure_filename(file.filename)
+            file.save(os.path.join(app.config['UPLOAD_KEY'], file.filename))
+            return start_decryption()
+        return 'Invalid File Format !'
+
 
 if __name__ == '__main__':
-	app.run(host='127.0.0.1', port=8000, debug=True)
-	#app.run()
+    app.run(host='127.0.0.1', port=8000, debug=True)
+    # app.run()