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import streamlit as st
from langserve.client import RemoteRunnable
def get_response(user_input, url, username):
response_placeholder = st.empty()
full_response = ""
chain = RemoteRunnable(url)
stream = chain.stream(input={'question': user_input, 'username': username})
for chunk in stream:
full_response += chunk
response_placeholder.markdown(full_response)
return full_response
def chat_interface(chat_title, page_hash ,url):
st.title(chat_title)
# Add username input at the top of the page
username = st.text_input("Enter your username:", key="username_input", value="Guest")
# Initialize page-specific chat history
if "chat_histories" not in st.session_state:
st.session_state.chat_histories = {}
if page_hash not in st.session_state.chat_histories:
st.session_state.chat_histories[page_hash] = []
# Display chat messages from history for the current page
for message in st.session_state.chat_histories[page_hash]:
with st.chat_message(message["role"]):
st.markdown(message["content"])
# React to user input
if prompt := st.chat_input("What is your message?"):
# Display user message in chat message container
st.chat_message("user").markdown(prompt)
# Add user message to chat history
st.session_state.chat_histories[page_hash].append({"role": "user", "content": prompt})
# Get streaming response
with st.chat_message("assistant"):
full_response = get_response(prompt, url, username)
# Add assistant response to chat history
st.session_state.chat_histories[page_hash].append({"role": "assistant", "content": full_response})
if __name__ == "__main__":
chat_interface() |