import streamlit as st st.markdown(""" # Level 3 Internet Communication Protocols # 📧 SMTP - Simple Mail Transfer Protocol: The standard protocol used for sending email messages over the internet. It defines how email clients and servers communicate and deliver messages. # 💬 XMPP - Extensible Messaging and Presence Protocol: A communication protocol used for instant messaging, presence information, and contact list management. It allows for interoperability between different messaging platforms. # 🌐 HTTP - **Hypertext Transfer Protocol**: The foundation of data communication on the World Wide Web. It defines how web browsers and servers exchange information, enabling the retrieval and display of web pages. """) st.markdown("""#Code: ``` import streamlit as st import smtplib from email.message import EmailMessage import http.client import requests # SMTP Example (Simplified) def smtp_client(server, port, from_email, to_email, subject, message): msg = EmailMessage() msg.set_content(message) msg['Subject'] = subject msg['From'] = from_email msg['To'] = to_email try: with smtplib.SMTP(server, port) as smtp: smtp.send_message(msg) return "Email sent successfully!" except Exception as e: return f"Failed to send email: {e}" # HTTP Example def http_client(url): try: response = requests.get(url) return response.text[:500] # Return the first 500 characters for brevity except Exception as e: return f"Failed to retrieve the URL: {e}" # Streamlit UI st.title("Internet Communication Protocols Demo 🌐") # SMTP Section st.header("SMTP Demo 📧") smtp_server = st.text_input("SMTP Server", value="smtp.example.com") smtp_port = st.text_input("SMTP Port", value="587") from_email = st.text_input("From Email", value="from@example.com") to_email = st.text_input("To Email", value="to@example.com") subject = st.text_input("Subject", value="Test Email") message = st.text_area("Message", value="This is a test email.") if st.button("Send Email"): result = smtp_client(smtp_server, smtp_port, from_email, to_email, subject, message) st.success(result) # HTTP Section st.header("HTTP Demo 🌐") url = st.text_input("URL to fetch", value="http://example.com") if st.button("Fetch URL"): result = http_client(url) st.text_area("Response", value=result, height=250) ``` ``` import streamlit as st from slixmpp import ClientXMPP from slixmpp.exceptions import IqError, IqTimeout class SendMsgBot(ClientXMPP): def __init__(self, jid, password, recipient, message): ClientXMPP.__init__(self, jid, password) self.recipient = recipient self.msg = message self.add_event_handler("session_start", self.session_start) def session_start(self, event): self.send_presence() self.get_roster() try: self.send_message(mto=self.recipient, mbody=self.msg, mtype='chat') except IqError as err: st.error(f"Could not send message: {err.iq['error']['text']}") self.disconnect() except IqTimeout: st.error("Server not responding") self.disconnect() else: st.success("Message sent successfully!") self.disconnect() # XMPP Section in Streamlit UI st.header("XMPP Demo 💬") jid = st.text_input("Jabber ID", value="user@server.com") password = st.text_input("Password", type="password") recipient = st.text_input("Recipient JID", value="friend@server.com") message = st.text_area("Message to send") if st.button("Send XMPP Message"): if jid and password and recipient and message: xmpp = SendMsgBot(jid, password, recipient, message) xmpp.connect() xmpp.process(forever=False) else: st.error("Please fill in all fields.") ``` """)