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.")

```

""")