我不确定为什么这段代码在我的 Flask 网络应用程序上给我一个 500 错误，有人可以告诉我我的逻辑哪里有问题吗？我有一种感觉，它与 sha256_crypt.verify（） 函数有关，但不确定如何解决这个问题。只是尝试从我的表中提取用户的所有数据并将其放入会话变量中。让我知道，谢谢！
@app.route('/login/', methods=['GET','POST'])
def login_page():
error = ''
try:
c, conn = connection()
if request.method == "POST":
c.execute("SELECT * FROM clients WHERE email = (%s)", (thwart(request.form['email']),))
pdata = c.fetchone()[3]
if sha256_crypt.verify(request.form['password'], pdata):
#get info from clients table
c.execute("SELECT * FROM clients WHERE email = (%s)", (email,))
clients_results = fetchall()
clientcid = clients_results[0]
#get info from cpersonals table
c.execute("SELECT * FROM cpersonals WHERE cid = (%s)", (clientcid,))
cpersonals_results = fetchall()
conn.commit()
c.close()
conn.close()
session['logged_in'] = 'client'
session['clientcid'] = clientcid
session['email'] = email
session['phone'] = clients_results[1]
session['rating'] = clients_results[4]
session['first_name'] = cpersonals_results[1]
session['last_name'] = cpersonals_results[2]
session['address'] = cpersonals_results[3]
session['czip'] = cpersonals_results[4]
session['reg_date'] = cpersonals_results[5]
flash("You are now logged in.")
return redirect(url_for("ask"))
else:
error = "Invalid credentials, try again."
return render_template("login.html", error = error)
except Exception as e:
#flash(e)
error = "Invalid credentials, try again."
return render_template("login.html", error = error)
日志：（对不起，不确定如何正确发布）
.991239 mod_wsgi (pid=5585): Target WSGI script '/var/www/FlaskApp/flaskapp.wsgi' cannot be loaded as Python module., referer: http://138.197.210.172/view_unanswered/
.948625 mod_wsgi (pid=5585): Exception occurred processing WSGI script '/var/www/FlaskApp/flaskapp.wsgi'., referer: http://138.197.210.172/view_unanswered/
.948649 Traceback (most recent call last):, referer: http://138.197.210.172/view_unanswered/
.948670 File "/var/www/FlaskApp/flaskapp.wsgi", line 7, in <module>, referer: http://138.197.210.172/view_unanswered/
.948744 from FlaskApp import app as application, referer: http://138.197.210.172/view_unanswered/
.948857 File "/var/www/FlaskApp/FlaskApp/__init__.py", line 270, referer: http://138.197.210.172/view_unanswered/
.948869 conn.commit(), referer: http://138.197.210.172/view_unanswered/
.948873 ^, referer: http://138.197.210.172/view_unanswered/
.948877 IndentationError: unindent does not match any outer indentation level, referer: http://138.197.210.172/view_unanswered/
06.003866 mod_wsgi (pid=5586): Target WSGI script '/var/www/FlaskApp/flaskapp.wsgi' cannot be loaded as Python module., referer: http://138.197.210.172/account/
06.003919 mod_wsgi (pid=5586): Exception occurred processing WSGI script '/var/www/FlaskApp/flaskapp.wsgi'., referer: http://138.197.210.172/account/
06.003942 Traceback (most recent call last):, referer: http://138.197.210.172/account/
06.003964 File "/var/www/FlaskApp/flaskapp.wsgi", line 7, in <module>, referer: http://138.197.210.172/account/
06.004030 from FlaskApp import app as application, referer: http://138.197.210.172/account/
06.004076 File "/var/www/FlaskApp/FlaskApp/__init__.py", line 270, referer: http://138.197.210.172/account/
06.004083 conn.commit(), referer: http://138.197.210.172/account/
06.004087 ^, referer: http://138.197.210.172/account/
06.004090 IndentationError: unindent does not match any outer indentation level, referer: http://138.197.210.172/account/
09.513219 mod_wsgi (pid=5585): Target WSGI script '/var/www/FlaskApp/flaskapp.wsgi' cannot be loaded as Python module., referer: http://138.197.210.172/
09.513258 mod_wsgi (pid=5585): Exception occurred processing WSGI script '/var/www/FlaskApp/flaskapp.wsgi'., referer: http://138.197.210.172/
09.513280 Traceback (most recent call last):, referer: http://138.197.210.172/
09.513301 File "/var/www/FlaskApp/flaskapp.wsgi", line 7, in <module>, referer: http://138.197.210.172/
09.513335 from FlaskApp import app as application, referer: http://138.197.210.172/
09.513357 ImportError: cannot import name app, referer: http://138.197.210.172/
09.550576 mod_wsgi (pid=5586): Target WSGI script '/var/www/FlaskApp/flaskapp.wsgi' cannot be loaded as Python module., referer: http://138.197.210.172/view_unanswered/
09.550615 mod_wsgi (pid=5586): Exception occurred processing WSGI script '/var/www/FlaskApp/flaskapp.wsgi'., referer: http://138.197.210.172/view_unanswered/
09.550639 Traceback (most recent call last):, referer: http://138.197.210.172/view_unanswered/
09.550661 File "/var/www/FlaskApp/flaskapp.wsgi", line 7, in <module>, referer: http://138.197.210.172/view_unanswered/
09.550697 from FlaskApp import app as application, referer: http://138.197.210.172/view_unanswered/
09.550718 ImportError: cannot import name app, referer: http://138.197.210.172/view_unanswered/
12.922623 mod_wsgi (pid=5585): Target WSGI script '/var/www/FlaskApp/flaskapp.wsgi' cannot be loaded as Python module., referer: http://138.197.210.172/
12.922697 mod_wsgi (pid=5585): Exception occurred processing WSGI script '/var/www/FlaskApp/flaskapp.wsgi'., referer: http://138.197.210.172/
12.922743 Traceback (most recent call last):, referer: http://138.197.210.172/
12.922768 File "/var/www/FlaskApp/flaskapp.wsgi", line 7, in <module>, referer: http://138.197.210.172/
12.922807 from FlaskApp import app as application, referer: http://138.197.210.172/
12.922838 ImportError: cannot import name app, referer: http://138.197.210.172/
12.955475 mod_wsgi (pid=5586): Target WSGI script '/var/www/FlaskApp/flaskapp.wsgi' cannot be loaded as Python module., referer: http://138.197.210.172/
12.955537 mod_wsgi (pid=5586): Exception occurred processing WSGI script '/var/www/FlaskApp/flaskapp.wsgi'., referer: http://138.197.210.172/
12.955561 Traceback (most recent call last):, referer: http://138.197.210.172/
12.955584 File "/var/www/FlaskApp/flaskapp.wsgi", line 7, in <module>, referer: http://138.197.210.172/
12.955620 from FlaskApp import app as application, referer: http://138.197.210.172/
12.955641 ImportError: cannot import name app, referer: http://138.197.210.172/
我不久前修复了这个问题，并希望更新帖子，以防其他人遇到这种情况。
所以我所做的只是从 sha256_crpt IF 语句中取出c.execute()函数，并将它们放在login重定向到的页面的函数开头。每个用户都会访问第一页，因此用户会话将始终具有这些值。
因此：
@app.route('/ask/', methods=['GET','POST'])
def ask():
#clients come here first
error = ''
try:
c, conn = connection()
#grab all the clients info
email = session['email']
c.execute("SELECT cid FROM clients WHERE email = (%s)", (thwart(email),))
clientcid = c.fetchone()[0]
c.execute("SELECT phone FROM clients WHERE email = (%s)", (thwart(email),))
phone = c.fetchone()[0]
c.execute("SELECT rating FROM clients WHERE email = (%s)", (thwart(email),))
rating = c.fetchone()[0]
c.execute("SELECT first_name FROM cpersonals WHERE cid = (%s)", (clientcid,))
first_name = c.fetchone()[0]
c.execute("SELECT last_name FROM cpersonals WHERE cid = (%s)", (clientcid,))
last_name = c.fetchone()[0]
c.execute("SELECT address FROM cpersonals WHERE cid = (%s)", (clientcid,))
address = c.fetchone()[0]
c.execute("SELECT city FROM cpersonals WHERE cid = (%s)", (clientcid,))
city = c.fetchone()[0]
c.execute("SELECT state FROM cpersonals WHERE cid = (%s)", (clientcid,))
state = c.fetchone()[0]
c.execute("SELECT zip FROM cpersonals WHERE cid = (%s)", (clientcid,))
czip = c.fetchone()[0]
c.execute("SELECT reg_date FROM cpersonals WHERE cid = (%s)", (clientcid,))
reg_date = c.fetchone()[0]
conn.commit()
c.close()
conn.close()
session['logged_in'] = 'client'
session['clientcid'] = clientcid
session['phone'] = phone
session['rating'] = rating
session['first_name'] = first_name
session['last_name'] = last_name
session['address'] = address
session['city'] = city
session['state'] = state
session['czip'] = czip
session['reg_date'] = reg_date