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嘗試從 sqlite3 檢索時出現 CGI 錯誤

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嘗試從 sqlite3 檢索時出現 CGI 錯誤

我正在嘗試建立一個非常簡單的登入頁面，該頁面詢問用戶他的register_no,username和password。當他按下提交按鈕。我正在嘗試檢查它是現有用戶還是新用戶並相應地顯示一條訊息。

我的資料夾層次結構是這樣的

prodicus@Acer:~/Downloads/souvik_refactoring$ tree
.
├── cgi-bin
│   ├── creating_user_base_table.py
│   ├── user_base.db
│   └── usr_check.py
├── index.html
└── keyCheck.py

1 directory, 5 files

我嘗試過的：

為了index.html

<!DOCTYPE html>
<html>
<head>
    <title>Login page</title>
</head>
<body>
    <div style = "text-align : center ; ">
        <h1>Login page</h1>
        <form action="/cgi-bin/usr_check.py" method="get"> 
            Registration number : <input type="number" name="register_no" min="1" max="2000000000">
            <br><br>
            Username : <input type="text" name="username">
            <br><br>
            Password : <input type="password" name = "password">
            <br><br>
            <input type="submit" value = "Login">
        </form>
    </div>
</body>
</html>

為了creating_user_base_table.py

#!/usr/bin/env python3.4

import sqlite3
import os

db_name = "user_base.db"

if db_name in os.listdir():
    print("removing the user_base.db and creating a fresh copy of it")
    os.system("rm user_base.db")

print("Creating the database")
conn = sqlite3.connect(db_name)
cur = conn.cursor()

user_table = "CREATE TABLE users(reg_no INTEGER PRIMARY KEY, user_name TEXT, pass TEXT)"

new_users = (
    (1081310251, 'admin', 'admin'),
    (1081310234, 'foo', 'admin123')
)

cur.execute(user_table)
print("table created")
cur.executemany('INSERT INTO users VALUES(?, ?, ?)', new_users)
conn.commit()
print("default users created \n\ndisplaying them")

cur.execute('SELECT * FROM users')
print(cur.fetchall())

最後usr_check.py

#/usr/bin/env python3.4

import cgi, cgitb
import os
import sqlite3

cgitb.enable()

form = cgi.FieldStorage()
register_no = form.getvalue('register_no')
username = form.getvalue('username')
passwd = form.getvalue('password')

print("Content-type:text/html\r\n\r\n")
print("<html>")
print("<head>")
print("<h1>Shit gets real here</h1>")
print("</head>")
print("<body>")
print('<div style = "text-align:center ; "')
# print("</div>")
print("")

conn = sqlite3.connect('user_base.db')
cur = conn.cursor()

## now to check whether the entered data is for
## -> new user 
## -> an old user

cur.execute('SELECT user_name FROM users WHERE register_no = ?', (register_no,))
rows = cur.fetchall()
print("<br><br>")
if len(rows) == 0:  
    print("<p>User : <b>", username , "</b> does not exist.</p>")
    cur.execute('INSERT INTO users VALUES(?, ?, ?)', (register_no, username, passwd))
    print("<p>User was created successfully</p>")
    print("Done")

else:
    print("<p>Welcome<b>", username ,"</b>. Good to have you back")
    print("<br><p>Your account details</p>")
    print("<ul>")
    print("<li>Register number : ", register_no, " </li>")
    print("<li>Username " , username, "</li>")
    print("</ul>")

錯誤日誌:

prodicus@Acer:~/Downloads/souvik_refactoring$ python -m CGIHTTPServer
Serving HTTP on 0.0.0.0 port 8000 ...
127.0.0.1 - - [02/Nov/2015 12:43:23] "GET /index.html HTTP/1.1" 200 -
127.0.0.1 - - [02/Nov/2015 12:44:03] "GET /cgi-bin/usr_check.py?register_no=1081310234&username=foo&password=admin123 HTTP/1.1" 200 -
Traceback (most recent call last):
  File "/usr/lib/python2.7/CGIHTTPServer.py", line 252, in run_cgi
    os.execve(scriptfile, args, env)
OSError: [Errno 8] Exec format error
127.0.0.1 - - [02/Nov/2015 12:44:03] CGI script exit status 0x7f00

按照此https://stackoverflow.com/questions/10793042/sqlite3-insert-using-python-and-python-cgi我有檔案權限

prodicus@Acer:~/Downloads/souvik_refactoring$ ll
total 36
drwxrwxr-x  3 prodicus prodicus  4096 Nov  2 08:30 ./
drwxr-xr-x 15 prodicus prodicus 20480 Nov  2 11:29 ../
drwxrwxrwx  2 prodicus prodicus  4096 Nov  2 12:23 cgi-bin/
-rw-rw-r--  1 prodicus prodicus   629 Nov  2 08:38 index.html
-rwxrwxr-x  1 prodicus prodicus   463 Nov  2 08:29 keyCheck.py*

和

prodicus@Acer:~/Downloads/souvik_refactoring/cgi-bin$ ll
total 20
drwxrwxrwx 2 prodicus prodicus 4096 Nov  2 12:23 ./
drwxrwxr-x 3 prodicus prodicus 4096 Nov  2 08:30 ../
-rwxrwxrwx 1 prodicus prodicus  710 Nov  1 23:12 creating_user_base_table.py*
-rwxrwxrwx 1 prodicus prodicus 2048 Nov  2 12:23 user_base.db*
-rwxrwxrwx 1 prodicus prodicus 1576 Nov  2 08:26 usr_check.py*

令人驚訝的是，cgitb沒有顯示錯誤。我哪裡錯了？

答案1

終於明白這是哪裡出了問題。犯了一個非常愚蠢的錯誤！感謝@cas 讓我來到這裡。

做了一個#/usr/bin/env python3.4而不是#!/usr/bin/env python3.4.

其次，當腳本usr_check.py嘗試連接到資料庫時，我必須給出絕對路徑user_base.db。

這為我解決了問題。

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