pages/2_📚_PDF预览.py

from meutils.pipe import *
from appzoo.streamlit_app import Page

import streamlit as st
import streamlit.components.v1 as components

class MyPage(Page):
    """
    https://zhuanlan.zhihu.com/p/518115802?utm_medium=social&utm_oi=1290068536690085888
    """

    def main(self):


        with st.form("PDF"):
            file = st.file_uploader("选择待上传的PDF文件", type=['pdf', 'docx', 'xlsx'])

            if st.form_submit_button('开始预览', help='先上传文件！！！'):
                if file is not None:
                    base64_pdf = base64.b64encode(file.read()).decode('utf-8')

                    self.display_pdf(base64_pdf, width='100%', height=1000)
                    self.display_html()

    def display_pdf(self, base64_pdf, width='100%', height=1000):
        # https://blog.51cto.com/laok8/2395498
        pdf_display = f"""<embed src="data:application/pdf;base64,{base64_pdf}" width="{width}" height="{height}" type="application/pdf">"""
        # data_type = 'vnd.openxmlformats-officedocument.wordprocessingml.document'
        # pdf_display = f"""<embed src="data:application/{data_type};base64,{base64_pdf}" width="{width}" height="{height}" type="application/{data_type}">"""

        st.markdown(pdf_display, unsafe_allow_html=True)

    def display_html(self, text='会飞的文字'):
        _ = f"""
        <marquee direction="down" width="100%" height="100%" behavior="alternate" style="border:solid"  bgcolor="#00FF00">

          <marquee behavior="alternate">

            {text}

          </marquee>

        </marquee>
        """
        st.markdown(_, unsafe_allow_html=True)

if __name__ == '__main__':
    app_title = "# PDF应用"
    app_info = "PDF预览"
    MyPage(
        app_title=app_title,
        app_info=app_info,
    ).main()