flask - 86 days - Learn Python online for 100 days

Aug 20, 2023#python学习273

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AI-generated summary

The recent two weeks have been difficult and busy, causing delays in the learning plan. Today, the task is to create a personal blog page with login and publishing functionalities. There have been some issues encountered during this exercise, such as the use of "return" for redirects and the correct indentation for loops and if statements. The code includes routes for the index, submission, login, and log pages, as well as HTML templates for the blog and login forms.

Record#

I haven't been feeling well and have been busy with too many things in the past two weeks, which has caused a lot of delays in this learning plan. I will catch up starting today!
Today's exercise is to create a personal blog page with login and publishing functionality.
There were several issues encountered during this exercise:
1. When redirecting, use "return".
2. When storing data in the database, if the value is "", it will be treated as a string because it is wrapped in quotes. Therefore, when storing in JSON format, there must be no quotes on the outside.
3. The indentation of the code after a loop or if statement must be correct, and understanding of the for loop needs to be strengthened.

CODE#

main.py#

from flask import Flask, request, redirect, session
from replit import db
import os
from datetime import datetime

app = Flask(__name__)
app.secret_key = os.environ['sission_key']


@app.route('/', methods=['GET'])
def index():
    #db['user'] = {'name': 'reno', 'pass': '123'}
    if session.get('name'):
        text1 = ""
        f = open("index.html", "r")
        page = f.read()
        f.close()
        for key in db.keys():
            if key and key != "user":
                name = db[key]
                text = f"""
                </hr>
                <h2>{name["title"]}</h2>
                <p>{key}</p>
                <p>{name["text"]}</p>
                """
                text1 += text
        page = page.replace("{text}", text1)
        return page
    else:
        return redirect('/log')


@app.route('/', methods=["POST"])
def submit():
    text = request.form
    ttime = datetime.now()
    title = text["title"]
    text = text["text"]
    db[ttime] = {"title": title, "text": text}
    return redirect('/')


@app.route('/log1')
def log1():
    return f"page{session.get('name')}"


@app.route('/log')
def log():
    f = open("login.html", "r")
    page = f.read()
    f.close()

    return page


@app.route('/login', methods=["POST"])
def login():
    user = request.form
    vuser = db['user']
    if vuser['name'] == user["name"] and vuser['pass'] == user["pass"]:
        session["name"] = vuser['name']
        print("--")
        print(session.get('name'))
        print("--")
        return redirect("/")
    else:
        return "NAME OR PASS ERROR!"


app.run(host='0.0.0.0', port=81)

index.html#

<html>
  <head>
    <title>MY BLOG</title>
  </head>
  <body>
    <h1>MY BLog</h1>
    <hr />
    <form method="post" action="/">
      <p>Title: <input type="text" name="title"></p>
      <p>Text: <input type="text" name="text"></p>
     <button>submit</button>
    </form>
     <p>{text}</p>
  </body>
</html>

login.html#

<form method="post" action="/login">
  <p>Name: <input name="name" type="text" ></p>
  <p>Pass: <input name="pass" type="text" ></p>
  <p><button name="submit" value="submit">submit</button></p>
</form>