<div class="content">Hello! I would like to share a simple code for a login page using Lua scripting. You are free to style the HTML codes however you want.<br>
The code can be a little challenging to understand at first, but feel free to ask if you don't understand any part.<br>
See also: <a href="https://forum.wapka.org/viewtopic.php?t=2057" class="postlink">Simple register page code using Lua scripting</a><br>
<br>
How to use it:
<ol style="list-style-type:decimal">
<li>Log in to the Wapka Dashboard (<a href="https://web.wapka.org/dashboard" class="postlink">https://web.wapka.org/dashboard</a>);</li>
<li>Select your website from the "Your services" list;</li>
<li>Now create a new page called "login" (Basic Function > New Page) - you can skip this step if you already have a login page and want to use it.</li>
<li>Now open the login page we created and go to Advanced function > Script, and finally paste the following Lua code into the textarea:</li>
</ol>
<div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>if (env.userid ~= 0) then -- Check if the user is already logged in
url.redirect("/") -- If yes, redirect to the main page end if (req.method == "POST") then -- Checks if the login form has been submitted
error_message = nil -- Starts error message as null
username = req.post.username -- Gets the username from the POST request
password = req.post.password -- Gets the password from the POST request
continue = req.get.continue -- Useful if the user came from another page
if continue == nil then continue = "/" end -- Checks if a continue URL has been defined, if not, it is defined as the home page
if (username == "" and password == "") then -- Checks if the username and password are empty
error_message = "You must enter your username and password."
elseif (username == "") then -- Checks if username is empty
error_message = "You must enter your username."
elseif (password == "") then -- Checks if password is empty
error_message = "You must enter your password."
else -- Continue with login if username and password have been filled in
local param = { -- Sets the parameters for the API login method
username = username,
password = password
}
local is_ok, login, info, error_login = api.user_login(param)
if (is_ok) then -- Username and password are correct and login was successful
url.redirect(continue) -- Redirects to the destination defined in continue
else -- An error occurred while trying to login
error_message = error_login -- defines the error message as the one received in the login method
end
end
if (error_message) then -- Checks if any errors occurred and sets an error message div to display on the page
html_error = [=[<div class="error-message">%s</div>]=]
error_message = string.format(html_error, error_message)
end end local html_code = [=[ <h2>Log-in to your account</h2> %s <!-- This is where the error message will be --> <form method="post"> <div class="input"> <label for="username">Username:</label><br> <input type="text" name="username" value="%s" placeholder="Username" id="username"> </div> <div class="input"> <label for="password">Password:</label><br> <input type="password" name="password" value="%s" placeholder="Password" id="password"> </div> <div class="input-button"> <input type="submit" class="input-button" value="Login"> </div> </form> <div class="register-message"> Not registered yet? <a href="/register">Register</a> </div> ]=] print(string.format(html_code, error_message or "", username or "", password or "")) </code></pre></div></div> <div class="notice"> Credit - <a href="/view/135624?q=francisco&id=135624&uid=135624" class="username">francisco</a> </div>
url.redirect("/") -- If yes, redirect to the main page end if (req.method == "POST") then -- Checks if the login form has been submitted
error_message = nil -- Starts error message as null
username = req.post.username -- Gets the username from the POST request
password = req.post.password -- Gets the password from the POST request
continue = req.get.continue -- Useful if the user came from another page
if continue == nil then continue = "/" end -- Checks if a continue URL has been defined, if not, it is defined as the home page
if (username == "" and password == "") then -- Checks if the username and password are empty
error_message = "You must enter your username and password."
elseif (username == "") then -- Checks if username is empty
error_message = "You must enter your username."
elseif (password == "") then -- Checks if password is empty
error_message = "You must enter your password."
else -- Continue with login if username and password have been filled in
local param = { -- Sets the parameters for the API login method
username = username,
password = password
}
local is_ok, login, info, error_login = api.user_login(param)
if (is_ok) then -- Username and password are correct and login was successful
url.redirect(continue) -- Redirects to the destination defined in continue
else -- An error occurred while trying to login
error_message = error_login -- defines the error message as the one received in the login method
end
end
if (error_message) then -- Checks if any errors occurred and sets an error message div to display on the page
html_error = [=[<div class="error-message">%s</div>]=]
error_message = string.format(html_error, error_message)
end end local html_code = [=[ <h2>Log-in to your account</h2> %s <!-- This is where the error message will be --> <form method="post"> <div class="input"> <label for="username">Username:</label><br> <input type="text" name="username" value="%s" placeholder="Username" id="username"> </div> <div class="input"> <label for="password">Password:</label><br> <input type="password" name="password" value="%s" placeholder="Password" id="password"> </div> <div class="input-button"> <input type="submit" class="input-button" value="Login"> </div> </form> <div class="register-message"> Not registered yet? <a href="/register">Register</a> </div> ]=] print(string.format(html_code, error_message or "", username or "", password or "")) </code></pre></div></div> <div class="notice"> Credit - <a href="/view/135624?q=francisco&id=135624&uid=135624" class="username">francisco</a> </div>
Like the above image...
Please, thank you.
