first

Procfile

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+web: sh setup.sh && streamlit run fernet.py

fernet.py

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+import streamlit as st
+from cryptography.fernet import Fernet
+st.write("""
+# funsi rsa
+""")
+# we will be encrypting the below string.
+input = st.text_input('Masukkan Teks', 'Andrea Praetyo Hariawan')
+ 
+# generate a key for encryption and decryption
+# You can use fernet to generate
+# the key or use random key generator
+# here I'm using fernet to generate key
+ 
+key = Fernet.generate_key()
+ 
+# Instance the Fernet class with the key
+ 
+fernet = Fernet(key)
+ 
+# then use the Fernet class instance
+# to encrypt the string string must
+# be encoded to byte string before encryption
+encMessage = fernet.encrypt(input.encode())
+ 
+st.write('enkripsi :', encMessage)
+ 
+# decrypt the encrypted string with the
+# Fernet instance of the key,
+# that was used for encrypting the string
+# encoded byte string is returned by decrypt method,
+# so decode it to string with decode methods
+decMessage = fernet.decrypt(encMessage).decode()
+ 
+st.write('dekripsi :', decMessage)

requirements.txt

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+cryptography==3.4.8
+streamlit==1.12.2

setup.sh

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+mkdir -p ~/.streamlit/
+
+echo "\
+[server]\n\
+headless = true\n\
+enableCORS=false\n\
+port = $PORT\n\
+" > ~/.streamlit/config.toml