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掲示板

#! /usr/bin/python
# coding: Shift_JIS

import cgi
import fcntl
import time
import re

#================================================ 設定
FILE        = './dat/bbs.dat'    # 書き込み保存ファイル
MAX        = 100            # 保存件数
VIEW        = 10            # 1ページの表示件数
TEXTMAX        = 1000            # 本文文字数制限(全角)
NAMEMAX        = 10            # 名前文字数制限(全角)
TITLEMAX    = 20            # 題名文字数制限(全角)
PASSWORD    = '1234'        # 削除用パスワード

#================================================ 関数定義
def read_log():
    log = []
    f = open(FILE)
    fcntl.flock(f.fileno(), fcntl.LOCK_SH)
    for line in f:
        log.append(line.rstrip("\n"))
    fcntl.flock(f.fileno(), fcntl.LOCK_UN)
    f.close()
    return log

def write_log():
    tm = time.time()
    data = "\t".join([str(tm), FORM['name'], FORM['title'], FORM['text'], ""])
    LOG.insert(0, data)
    while len(LOG) > MAX:
        LOG.pop()
    f = open(FILE, "w")
    fcntl.flock(f.fileno(), fcntl.LOCK_EX)
    f.write("\n".join(LOG))
    fcntl.flock(f.fileno(), fcntl.LOCK_UN)
    f.close()

def delete_log():
    no = int(FORM['del'])
    del LOG[no]
    f = open(FILE, "w")
    fcntl.flock(f.fileno(), fcntl.LOCK_EX)
    f.write("\n".join(LOG))
    fcntl.flock(f.fileno(), fcntl.LOCK_UN)
    f.close()

def print_log():
    page = int(FORM['page'])
    begin = page * VIEW
    end = begin + VIEW
    loglen = len(LOG)
    if end > loglen:
        end = loglen
    for i in range(begin, end):
        tm, name, title, text, hid = re.split("\t", LOG[i], 4)
        if name == "":
            name = "名無し"
        if title == "":
            title = "無題"
        print """
            <input type="radio" name="del" value="%0d">
            【%s】%s<br>
            %s
            <div align=\"right\">%s</div>
            <hr>
        """ % (i, title, name, text, time.ctime(float(tm)))
    print "<center>"
    if begin > 0:
        print """<a href="?page=%d">≪前ページ</a>""" % (page - 1)
    if end < loglen:
        print """<a href="?page=%d">次ページ≫</a>""" % (page + 1)
    print "</center>"

def get_form():
    CGI = cgi.FieldStorage()
    form = {}
    for k in ['mode', 'pass', 'name', 'title', 'text']:
        form[k] = ""
    for k in ['page']:
        form[k] = "0"
    for k in CGI.keys():
        form[k] = CGI.getvalue(k, "")
        form[k] = cgi.escape(form[k])
        form[k] = re.sub("\x0D\x0A\s*", "<br>", form[k])
        form[k] = re.sub("\s+", " ", form[k])
    return form


#================================================ メインプログラム
FORM = get_form()

LOG = read_log()
#サンプルにつき書き込み停止
#if FORM['mode'] == "write"\
# and FORM['text'] != ""\
# and len(FORM['name']) <= NAMEMAX * 2\
# and len(FORM['title']) <= TITLEMAX * 2\
# and len(FORM['text']) <= TEXTMAX * 2:
#    write_log()
#elif FORM['mode'] == "delete" and FORM['pass'] == PASSWORD:
#    delete_log()

print "Content-type: text/html; charset=Shift_JIS"
print """
    <html>
    <head>
    <title>掲示板</title>
    </head>
    <body bgcolor="#ffccff">
    <h1 style="margin:2px;font-size:15px;letter-spacing:50px">掲示板</h1>
    <hr>
    <form action="" method="POST">
    名前:<input type="text" name="name" size="50" maxlength="%d" value="%s"><br>
    <br>
    題名:<input type="text" name="title" size="50" maxlength="%d"><br>
    <br>
    本文: <small>※全角%d文字以内</small><br>
    <textarea name="text" rows="10" cols="80"></textarea><br>
    <br>
    <input type="hidden" name="mode" value="write">
    <input type="submit" value=" 書き込み "><br>
    </form>
    <form action="" method="POST">
    <hr>
""" % (NAMEMAX, FORM['name'], TITLEMAX, TEXTMAX)

print_log()

print """
    <div align="right">
    <input type="password" name="pass" value="%s" size="4">
    <input type="hidden" name="mode" value="delete">
    <input type="hidden" name="page" value="%s">
    <input type="submit" value="削除">
    </div>
    </form>
    </body>
    </html>
""" % (FORM['pass'], FORM['page'])
かんたん作成【HTML CSS JavaScript PHP CGI Perl Ruby Python .htaccess】