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import os
from cs50 import SQL
from flask import Flask, flash, redirect, render_template, request, session
from flask_session import Session
from tempfile import mkdtemp
from werkzeug.exceptions import default_exceptions, HTTPException, InternalServerError
from werkzeug.security import check_password_hash, generate_password_hash
from helpers import apology, login_required, lookup, usd
# Configure application
app = Flask(__name__)
# Ensure templates are auto-reloaded
app.config["TEMPLATES_AUTO_RELOAD"] = True
# Ensure responses aren't cached
@app.after_request
def after_request(response):
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Expires"] = 0
response.headers["Pragma"] = "no-cache"
return response
# Custom filter
app.jinja_env.filters["usd"] = usd
# Configure session to use filesystem (instead of signed cookies)
app.config["SESSION_FILE_DIR"] = mkdtemp()
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "filesystem"
Session(app)
# Configure CS50 Library to use SQLite database
db = SQL("sqlite:///finance.db")
# 全局变量作为临时缓存，防止频繁查询数据库
stocks = {}
# Make sure API key is set
if not os.environ.get("API_KEY"):
raise RuntimeError("API_KEY not set")
@app.route("/")
@login_required
def index():
"""Show portfolio of stocks"""
# 获取用户ID
user_id = session["user_id"]
# 获取用户持有的股票列表
results = stocks[str(user_id)]
# 资产总和
total = 0.0
# 将需要展示的信息，放入股票列表中
for result in results:
stock = lookup(result["symbol"])
if stock is None:
return apology("invalid symbol", 400)
# 股票单价
price = float(stock["price"])
# 格式处理
result["price"] = '%.2f' % price
# 股票数量
shares = float(result["shares"])
# 单个股票总价格
result["total"] = '%.2f' % (round(price * shares, 2))
# 资金总数
total += round(price * shares, 2)
# 获取用户的现金数量列表
# 此处应该提取一个方法，但是返回比较麻烦，暂时不做
cash = db.execute("select cash from users where id = ?", user_id)
if len(cash) < 1:
return apology("user not found", 400)
elif len(cash) > 1:
return apology("multiple users error", 400)
# 用户现金数与资产总和
money = round(cash[0]["cash"], 2)
total = round(total + money, 2)
# 格式处理
money = '%.2f' % money
total = '%.2f' % total
return render_template("index.html", results=results, money=money, total=total)
@app.route("/buy", methods=["GET", "POST"])
@login_required
def buy():
"""Buy shares of stock"""
user_id = session["user_id"]
results = stocks[str(user_id)]
if request.method == "GET":
return render_template("buy.html")
elif request.method == "POST":
# 获取股票代码与份额
symbol = request.form.get("symbol")
shares = request.form.get("shares")
# 此处应该提取一个方法，但是返回比较麻烦，暂时不做
# 验证传递过来的代码与份额
if not symbol:
return apology("must provide symbol", 400)
symbol = symbol.upper()
if not shares:
return apology("must provide shares", 400)
elif not shares.isdigit():
return apology("shares must be positive integer", 400)
shares = float(shares)
if shares % 1 != 0 or shares < 1:
return apology("shares must be larger than 1", 400)
shares = int(shares)
# 获取股票信息
stock = lookup(symbol)
if stock is None:
return apology("invalid symbol", 400)
price = stock["price"]
name = stock["name"]
# 获取用户现金数量列表
cash = db.execute("select cash from users where id = ?", user_id)
if len(cash) < 1:
return apology("user not found", 400)
elif len(cash) > 1:
return apology("multiple users error", 400)
# 判断现金是否足够
if cash[0]["cash"] < (price * shares):
return apology("insufficient cash", 400)
flag = True
# 判断是否是新股票，新股加入持仓，旧股更新份额
for result in results:
if result["symbol"] == symbol:
result["shares"] += shares
flag = False
break
if flag:
new_stock = {"symbol": symbol, "name": name, "shares": shares}
results.append(new_stock)
# 计算余额
remaining = cash[0]["cash"] - price * shares
# 更新数据库
db.execute("update users set cash = ? where id = ?", remaining, user_id)
db.execute(
"insert into transactions (user_id, trade, symbol, name, shares, price, total) values (?, ?, ?, ?, ?, ?, ?)",
user_id, 1, symbol, name, shares, price, (shares * price))
return redirect("/")
return apology("TODO")
@app.route("/history")
@login_required
def history():
"""Show history of transactions"""
user_id = session["user_id"]
results = db.execute("select * from transactions where user_id = ?", user_id)
for result in results:
result["shares"] = result["trade"] * result["shares"]
result["price"] = '%.2f' % result["price"]
result["total"] = '%.2f' % result["total"]
return apology("history.html", results=results)
@app.route("/login", methods=["GET", "POST"])
def login():
"""Log user in"""
# Forget any user_id
session.clear()
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
# Ensure username was submitted
if not request.form.get("username"):
return apology("must provide username", 400)
# Ensure password was submitted
elif not request.form.get("password"):
return apology("must provide password", 400)
# Query database for username
rows = db.execute("SELECT * FROM users WHERE username = ?", request.form.get("username"))
# Ensure username exists and password is correct
if len(rows) != 1 or not check_password_hash(rows[0]["hash"], request.form.get("password")):
return apology("invalid username and/or password", 400)
# Remember which user has logged in
session["user_id"] = rows[0]["id"]
#
user_id = session["user_id"]
#
results = db.execute(
"select symbol, name, sum(shares * trade) as shares from transactions where user_id = ? group by symbol",
user_id)
stocks[str(user_id)] = results
# Redirect user to home page
return redirect("/")
# User reached route via GET (as by clicking a link or via redirect)
else:
return render_template("login.html")
@app.route("/logout")
def logout():
"""Log user out"""
# Forget any user_id
session.clear()
# Redirect user to login form
return redirect("/")
@app.route("/quote", methods=["GET", "POST"])
@login_required
def quote():
"""Get stock quote."""
if request.method == "GET":
return render_template("quote.html")
elif request.method == "POST":
# 验证股票代码
symbol = request.form.get("symbol")
if not symbol:
return apology("must provide symbol", 400)
# 获取股票信息
stock = lookup(symbol)
if stock is None:
return apology("invalid symbol", 400)
else:
price = float(stock["price"])
stock["price"] = '%.2f' % price
return render_template("quoted.html", quote=stock)
return apology("TODO")
@app.route("/register", methods=["GET", "POST"])
def register():
"""Register user"""
if request.method == "GET":
return render_template("register.html")
elif request.method == "POST":
input_username = request.form.get("username")
# Ensure username was submitted
if not input_username:
return apology("must provide username", 400)
db_usernames = db.execute("select username from users where username = ?", input_username)
if len(db_usernames) != 0:
return apology("username already exists", 400)
# Ensure password was submitted
elif not request.form.get("password"):
return apology("must provide password", 400)
elif not request.form.get("confirmation"):
return apology("must provide confirmation password", 400)
if request.form.get("password") != request.form.get("confirmation"):
return apology("password must be as same as confirmation password", 400)
db.execute("insert into users (username, hash, cash) values (?, ?, 10000.00)", input_username,
generate_password_hash(request.form.get("password")))
return redirect("/")
return apology("TODO")
@app.route("/sell", methods=["GET", "POST"])
@login_required
def sell():
"""Sell shares of stock"""
user_id = session["user_id"]
results = stocks[str(user_id)]
if request.method == "GET":
return render_template("sell.html", results=results)
elif request.method == "POST":
symbol = request.form.get("symbol")
shares = request.form.get("shares")
# 此处应该提取一个方法，但是返回比较麻烦，暂时不做
# 验证传递过来的代码与份额
if not symbol:
return apology("must provide symbol", 400)
symbol = symbol.upper()
if not shares:
return apology("must provide shares", 400)
elif not shares.isdigit():
return apology("shares must be positive integer", 400)
shares = float(shares)
if shares % 1 != 0 or shares < 1:
return apology("shares must be larger than 1", 400)
shares = int(shares)
flag = True
# 找到持仓中的股票代码，判断份额，进行相应操作
for result in results:
if symbol == result["symbol"]:
flag = False
if shares > result["shares"]:
return apology("insufficient shares to sell", 400)
else:
result["shares"] -= shares
# 没有在持仓中找到传递过来的股票代码
if flag:
return apology("symbol not found in portfolio", 400)
# 获取股票信息
stock = lookup(symbol)
if stock is None:
return apology("invalid symbol", 400)
# 获取用户现金数量列表
cash = db.execute("select cash from users where id = ?", user_id)
if len(cash) < 1:
return apology("user not found", 400)
elif len(cash) > 1:
return apology("multiple users error", 400)
price = stock["price"]
name = stock["name"]
# 计算用户现金
remaining = cash[0]["cash"] + price * shares
# 更新数据库
db.execute("update users set cash = ? where id = ?", remaining, user_id)
db.execute(
"insert into transactions (user_id, trade, symbol, name, shares, price, total) values (?, ?, ?, ?, ?, ?, ?)",
user_id, -1, symbol, name, shares, price, (shares * price))
return redirect("/")
return apology("TODO")
def errorhandler(e):
"""Handle error"""
if not isinstance(e, HTTPException):
e = InternalServerError()
return apology(e.name, e.code)
# Listen for errors
for code in default_exceptions:
app.errorhandler(code)(errorhandler)
def validate_data(symbol, shares):
return None
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