掲示板 : Bulletin board system をプログラムする。
Bulletin board system
https://en.wikipedia.org/wiki/Bulletin_board_system
youtube 資料
古いの
https://youtu.be/Dddbe9OuJLU
わりと最近 ( 温故知新 )
https://youtu.be/wqqhSz2fLVw
いろんな言語で書いてみたいが、web framework を使って プログラムする方法を知るために、まず、Ruby と web framework を sinatra にして、どうやって掲示板をプログラミングするかを並べていく。
sinatra
https://sinatrarb.com/
Ruby と Sinatra での Hello World までは、
できるだけわかりやすい Ruby + Sinatra で web アプリ
Files & Directories
BBS directories
BBS/Gemfile
All in one piece
BBS/views Directory
BBS/views/layout.erb
BBS/views/login.erb
BBS/views/logout.erb
BBS/views/loginfail.erb
BBS/views/badrequest.erb
BBS/views/ca.erb
BBSviews/created.erb
BBS/views/board.erb
BBS/public Directory
BBS/public/css/style.css
BBS Directory
BBS/bbs.rb
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require 'active_record'
require 'sinatra'
set :environment, :production
set :sessions,
exprre_after: 70000,
secret: 'assdffgfhjjkklaslllg'
ActiveRecord::Base.establish_connection(:adapter=>'sqlite3',:database=>'bbsdata.db')
class BBSdata < ActiveRecord::Base
self.table_name = 'bbsdata'
end
class Account < ActiveRecord::Base
self.table_name = 'accounts'
end
# keepers able to delete scum comments.
class Keeper < ActiveRecord::Base
self.table_name = 'keepers'
end
class Kickaccount < ActiveRecord::Base
self.table_name = 'kickaccounts'
end
# html sanitizer
helpers do
def h(text)
Rack::Utils.escape_html(text)
end
end
get '/' do
redirect '/login' # create account
end
get '/ca' do # create account
erb :ca
end
get '/ca2' do # create account
@message = "Change username.The username is already in use."
erb :ca
end
post '/create' do
@username = h(params[:username])
@username.gsub!("\"|\\","")
@username.gsub!(/;/,"")
rawpassword = h(params[:passwd])
rawpassword.gsub!("\"|\\","")
rawpassword.gsub!(/;/,"")
begin
f = Account.find(@username)
if f.id == @username
puts "Change username.The username is already in use."
redirect '/ca2'
end
rescue =>e
puts "OK.Username has accepted."
end
algorithm = "100"
rand = Random.new
spice = Digest::SHA256.hexdigest(rand.bytes(20))
hashed = Digest::SHA256.hexdigest(rawpassword + spice)
ca = Account.new # create account
ca.id = @username
ca.salt = spice
ca.hashed = hashed
ca.algorithm = algorithm
ca.save
erb :created
end
get '/login' do
erb :login
end
get '/created' do
session[:username] = @username
erb :created
end
get '/board' do
@u_name = session[:username]
if @u_name == nil
redirect '/badrequest'
end
begin
kicked_account = Kickaccount.all
kicked_account.each do |kv|
if kv.userid == @u_name
puts "kick out: #{kv.userid}"
redirect '/logout'
end
end
rescue => e
puts "error"
end
@admin = ""
puts "you are #{@u_name}."
begin
roomkeeper = Keeper.find(@u_name)
@admin = roomkeeper.id
puts "you are roomleeper."
rescue => e
puts "you are not roomkeeper."
end
all_data = BBSdata.all
if all_data.count == 0
@table = "<tr><td>This BBS is Empty.</td></tr>"
else
@table = ""
kicked = []
all_data.reverse_each do |one|
if one.k == 1
kicked << one.userid
kicked.uniq!
end
n1 = one.userid.size
n2 = one.entry.size
str1 = ""
str2 = ""
n1.times do
str1 += "■"
end
n2.times do
str2 += "■"
end
@table = @table + "<tr>"
@table = @table + "<td style=\"witdh: 5%\">#{one.id}</td>"
if one.v == 0
@table = @table + "<td>[#{one.userid}]</td>"
else
@table = @table + "<td>[#{str1}]</td>"
end
@table = @table + "<td><font size=\"-2\">#{Time.at(one.writedata)}</font></td>"
if (one.userid == @u_name && one.v == 0) || (@admin != "" && one.v == 0)
@table = @table + "<td><form action=\"/delete\" method=\"post\">"
@table = @table + "<input type=\"hidden\" name=\"id\" value=\"#{one.id}\">"
@table = @table + "<input type=\"hidden\" name=\"_method\" value=\"delete\">"
@table = @table + "<input type=\"submit\" value=\"Delete\"></form></td>"
else
@table = @table + "<td></td>"
end
@table = @table + "</tr>"
if one.v == 0
@table = @table + "<tr><td style=\"word-break: break-word\" colspan=\"4\">#{one.entry}</td></tr>\n"
else
@table = @table + "<tr><td style=\"word-break: break-word\" colspan=\"4\">#{str2}</td></tr>\n"
end
if @admin != "" && @admin != one.userid && !kicked.include?(one.userid)
@table = @table + "<tr><td><font size=\"-2\">#{one.addr}</font></td>"
@table = @table + "<td><form action=\"/kick\" method=\"post\">"
@table = @table + "<input type=\"hidden\" name=\"bbsdataid\" value=\"#{one.id}\">"
@table = @table + "<input type=\"hidden\" name=\"_method\" value=\"delete\">"
@table = @table + "<input type=\"submit\" value=\"Kick\"></form></td></tr>\n"
elsif @admin != "" && @admin != one.userid && kicked.include?(one.userid)
@table = @table + "<tr><td><font size=\"-2\">#{one.addr}</font></td>"
@table = @table + "<td><form action=\"/kickback\" method=\"post\">"
@table = @table + "<input type=\"hidden\" name=\"bbsdataid\" value=\"#{one.id}\">"
@table = @table + "<input type=\"hidden\" name=\"_method\" value=\"delete\">"
@table = @table + "<input type=\"submit\" value=\"Kickback\"></form></td></tr>\n"
end
@table = @table + "<tr><td colspan=\"4\">_____________________________________________________________________________</td></tr>"
end
end
erb :board
end
post '/new' do
maxid = 0
begin
last = BBSdata.last
if last.id > maxid
maxid = last.id
end
rescue =>e
puts maxid
end
new_comment = BBSdata.new
new_comment.id = maxid + 1
new_comment.userid = h(session[:username])
new_comment.entry = h(params[:entry])
new_comment.writedata = Time.now.to_i
new_comment.v = 0 # invisible : 1
new_comment.addr = @env['REMOTE_ADDR']
new_comment.k = 0 # kicked : 1
new_comment.save
redirect '/board' # return to BBS
end
delete '/kick' do
maxid = 0
begin
last = Kickaccount.last
if last.id > maxid
maxid = last.id
end
rescue => e
puts "maxid: #{maxid}"
end
kicked = Kickaccount.new
kicked.id = maxid + 1
username = ""
begin
f1 = BBSdata.find(h(params[:bbsdataid]))
kicked.userid = f1.userid
username = f1.userid
kicked.addr = f1.addr
kicked.save
rescue => e
puts "f1 Error"
end
begin
f2 = BBSdata.where(userid: "#{username}")
f2.each do |matched_one|
puts matched_one.id
matched_one.k = 1
matched_one.save
end
rescue => e
puts "f2 Error"
end
redirect '/board'
end
delete '/kickback' do
puts (h(params[:bbsdataid]))
username = ""
begin
f1 = BBSdata.find(h(params[:bbsdataid]))
username = f1.userid
begin
f2 = Kickaccount.all
f2.each do |matched_one|
if matched_one.userid == f1.userid
matched_one.destroy
end
end
rescue => e
puts "f2 Error"
end
rescue => e
puts "f1 Error"
end
begin
f3 = BBSdata.where(userid: "#{username}")
f3.each do |m|
puts m.id
m.k = 0
m.save
end
rescue => e
puts "f3 Error"
end
redirect '/board'
end
delete '/delete' do
begin
s = BBSdata.find(h(params[:id]))
# s.destroy
s.v = 1 # invisible
s.save
rescue => e
puts "Delete Error"
end
redirect '/board'
end
get '/logout' do
session.clear
erb :logout
end
get '/loginfail' do
session.clear
erb :loginfail
end
#################################
get '/*' do
redirect '/'
end
#################################
#--------------------------------
post '/auth' do
user = h(params[:uname])
user.gsub!("\"","")
user.gsub!(/;/,"")
pass = h(params[:pass])
pass.gsub!("\"","")
pass.gsub!(/;/,"")
redirect_flag = checkFlag(user, pass)
if redirect_flag == "true"
session[:username] = user
redirect '/board'
end
redirect '/loginfail'
end
def checkFlag(check_username,check_password)
redirect_flag = "fail" # go to "/loginfail"
begin
cf = Account.find(check_username)
db_username = cf.id
db_spice = cf.salt
db_hashed = cf.hashed
check_hashed = Digest::SHA256.hexdigest(check_password + db_spice)
if check_hashed == db_hashed
redirect_flag = "true"
puts "go to \"/board\""
end
rescue => e
redirect_flag = "error"
puts "go to \"/loginfail\""
end
return(redirect_flag)
end
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