-- redbean lua server page demo
local function main()
-- This is the best way to print data to the console or log file.
Log(kLogWarn, "hello from \e[1mlua\e[0m!")
-- This check is pedantic but might be good to have.
if GetMethod() ~= 'GET' and GetMethod() ~= 'HEAD' then
ServeError(405)
SetHeader('Allow', 'GET, HEAD')
return
end
-- These two lines are optional.
-- The default behavior is to do this if you don't.
SetStatus(200) -- Shorthand for SetStatus(200, "OK")
SetHeader('Content-Type', 'text/html; charset=utf-8')
-- Response data is buffered until the script finishes running.
-- Compression is applied automatically, based on your headers.
Write('<!doctype html>\r\n')
Write('<title>redbean</title>\r\n')
Write('<h1>\r\n')
Write('<img style="vertical-align:middle" src="data:image/png;base64,\r\n')
Write(EncodeBase64(LoadAsset('/redbean.png')))
Write('">\r\n')
Write('redbean lua server page demo\r\n')
Write('</h1>\r\n')
-- Prevent caching.
-- We need this because we're doing things like putting the client's
-- IP address in the response so we naturally don't want that cached
SetHeader('Expires', FormatHttpDateTime(GetDate()))
SetHeader('Cache-Control', 'no-cache, must-revalidate, max-age=0')
-- GetUrl() is the resolved Request-URI (TODO: Maybe change API to return a URL object?)
Write('<p>Thank you for visiting <code>')
Write(GetUrl()) -- redbean encoded this value so it doesn't need html entity escaping
Write('</code>\r\n')
-- GetParam(NAME) is the fastest easiest way to get URL and FORM params
-- If you want the RequestURL query params specifically in full do this
Write('<h3>request url parameters</h3>\r\n')
params = ParseUrl(GetUrl()).params -- like GetParams() but w/o form body
if params and #params>0 then
Write('<dl>\r\n')
for i = 1,#params do
Write('<dt>')
Write(EscapeHtml(VisualizeControlCodes(params[i][1])))
Write('\r\n')
if params[i][2] then
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(params[i][2])))
Write('\r\n')
end
end
Write('</dl>\r\n')
Write("<p>Whatever you do, don't click on ")
Write('<a href="')
Write(EscapeHtml(EscapePath(GetPath()) .. '?magic'))
Write('">')
Write(EscapeHtml(VisualizeControlCodes(GetPath())))
Write('?magic</a>\r\n')
else
Write('<p>\r\n')
Write('<em>none</em><br>\r\n')
Write('ProTip: Try <a href="')
Write(EscapeHtml(EscapePath(GetPath()) .. '?x=hi%20there%00%C0%80&y&z&z=' .. EscapeParam('&')))
Write('">clicking here</a>!\r\n')
end
-- redbean command line arguments
-- these come *after* the c getopt server arguments
Write('<h3>command line arguments</h3>\r\n')
if #argv > 0 then
Write('<ul>\r\n')
for i = 1,#argv do
Write('<li>')
Write(EscapeHtml(VisualizeControlCodes(argv[i])))
Write('\r\n')
end
Write('</ul>\r\n')
else
Write('<p><em>none</em>\r\n')
end
Write([[
<h3>post request html form demo</h3>
<form action="redbean-form.lua" method="post">
<input type="text" id="firstname" name="firstname">
<label for="firstname">first name</label>
<br>
<input type="text" id="lastname" name="lastname">
<label for="lastname">last name</label>
<br>
<input type="submit" value="Submit">
</form>
]])
Write([[
<h3>xmlhttprequest request demo</h3>
<input id="x" value="lâtìn1">
<label for="x">X-Custom-Header</label><br>
<button id="send">send</button><br>
<div id="result"></div>
<script>
function OnSend() {
var r = new XMLHttpRequest();
r.onload = function() {
document.getElementById("result").innerText = this.getResponseHeader('X-Custom-Header');
};
r.open('POST', 'redbean-xhr.lua');
r.setRequestHeader('X-Custom-Header', document.getElementById('x').value);
r.send();
}
document.getElementById('send').onclick = OnSend;
</script>
]])
-- fast redbean apis for accessing already parsed request data
Write('<h3>extra information</h3>\r\n')
Write('<dl>\r\n')
Write('<dt>GetMethod()\r\n')
Write('<dd>')
Write(EscapeHtml(GetMethod())) -- & and ' are legal in http methods
Write('\r\n')
if GetUser() then
Write('<dt>GetUser()\r\n')
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(GetUser())))
Write('\r\n')
end
if GetScheme() then
Write('<dt>GetScheme()\r\n')
Write('<dd>')
Write(GetScheme())
Write('\r\n')
end
if GetPass() then
Write('<dt>GetPass()\r\n')
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(GetPass())))
Write('\r\n')
end
Write('<dt>GetHost() <small>(from HTTP Request-URI or Host header or X-Forwarded-Host header or Berkeley Sockets)</small>\r\n')
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(GetHost())))
Write('\r\n')
Write('<dt>GetPort() <small>(from HTTP Request-URI or Host header or X-Forwarded-Host header or Berkeley Sockets)</small>\r\n')
Write('<dd>')
Write(tostring(GetPort()))
Write('\r\n')
Write('<dt>GetPath() <small>(from HTTP Request-URI)</small>\r\n')
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(GetPath())))
Write('\r\n')
Write('<dt>GetEffectivePath() <small>(actual path used internally to load the lua asset: routed depending on host, request path, and rewrites)</small>\r\n')
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(GetEffectivePath())))
Write('\r\n')
if GetFragment() then
Write('<dt>GetFragment()\r\n')
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(GetFragment())))
Write('\r\n')
end
Write('<dt>GetRemoteAddr() <small>(from Berkeley Sockets or X-Forwarded-For header)</small>\r\n')
Write('<dd>')
ip, port = GetRemoteAddr()
Write(string.format('%s, %d', FormatIp(ip), port))
if CategorizeIp(ip) then
Write('<br>\r\n')
Write(CategorizeIp(ip))
end
Write('\r\n')
Write('<dt>GetClientAddr()\r\n')
Write('<dd>')
ip, port = GetClientAddr()
Write(string.format('%s, %d', FormatIp(ip), port))
if CategorizeIp(ip) then
Write('<br>\r\n')
Write(CategorizeIp(ip))
end
Write('\r\n')
Write('<dt>GetServerIp()\r\n')
Write('<dd>')
ip, port = GetServerAddr()
Write(string.format('%s, %d', FormatIp(ip), port))
if CategorizeIp(ip) then
Write('<br>\r\n')
Write(CategorizeIp(ip))
end
Write('\r\n')
Write('</dl>\r\n')
-- redbean apis for generalized parsing and encoding
referer = GetHeader('Referer')
if referer then
url = ParseUrl(referer)
if url.scheme then
url.scheme = string.upper(url.scheme)
end
Write('<h3>referer url</h3>\r\n')
Write('<p>\r\n')
Write(EscapeHtml(EncodeUrl(url)))
Write('<dl>\r\n')
if url.scheme then
Write('<dt>scheme\r\n')
Write('<dd>\r\n')
Write(url.scheme)
end
if url.user then
Write('<dt>user\r\n')
Write('<dd>\r\n')
Write(EscapeHtml(VisualizeControlCodes(url.user)))
end
if url.pass then
Write('<dt>pass\r\n')
Write('<dd>\r\n')
Write(EscapeHtml(VisualizeControlCodes(url.pass)))
end
if url.host then
Write('<dt>host\r\n')
Write('<dd>\r\n')
Write(EscapeHtml(VisualizeControlCodes(url.host)))
end
if url.port then
Write('<dt>port\r\n')
Write('<dd>\r\n')
Write(EscapeHtml(VisualizeControlCodes(url.port)))
end
if url.path then
Write('<dt>path\r\n')
Write('<dd>\r\n')
Write(EscapeHtml(VisualizeControlCodes(url.path)))
end
if url.params then
Write('<dt>params\r\n')
Write('<dd>\r\n')
Write('<dl>\r\n')
for i = 1,#url.params do
Write('<dt>')
Write(EscapeHtml(VisualizeControlCodes(url.params[i][1])))
Write('\r\n')
if url.params[i][2] then
Write('<dd>')
Write(EscapeHtml(VisualizeControlCodes(url.params[i][2])))
Write('\r\n')
end
end
Write('</dl>\r\n')
end
if url.fragment then
Write('<dt>fragment\r\n')
Write('<dd>\r\n')
Write(EscapeHtml(VisualizeControlCodes(url.fragment)))
end
Write('</dl>\r\n')
end
Write('<h3>posix extended regular expressions</h3>\r\n')
s = 'my ' .. FormatIp(GetRemoteAddr()) .. ' ip'
-- traditional regular expressions
m,a,b,c,d = re.search([[\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)]], s, re.BASIC)
-- easy api (~10x slower because compile is O(2ⁿ) and search is O(n))
m,a,b,c,d = re.search([[([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})]], s)
-- proper api (especially if you put the re.compile() line in /.init.lua)
pat = re.compile([[([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})]])
m,a,b,c,d = pat:search(s) -- m and rest are nil if match not found
Write('<pre>\r\n')
Write([[pat = re.compile('([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})')]])
Write(string.format('\r\nm,a,b,c,d = pat:search(%q)\r\n', s))
Write('</pre>\r\n')
Write('<dl>\r\n')
Write('<dt>m\r\n')
Write('<dd>')
Write(string.format("%q", m))
Write('\r\n')
Write('<dt>a\r\n')
Write('<dd>')
Write(string.format("%q", a))
Write('\r\n')
Write('<dt>b\r\n')
Write('<dd>')
Write(string.format("%q", b))
Write('\r\n')
Write('<dt>c\r\n')
Write('<dd>')
Write(string.format("%q", c))
Write('\r\n')
Write('<dt>d\r\n')
Write('<dd>')
Write(string.format("%q", d))
Write('\r\n')
Write('</dl>\r\n')
Write('<h3>source code to this page</h3>\r\n')
Write('<pre>\r\n')
Write(EscapeHtml(LoadAsset(GetEffectivePath())))
Write('</pre>\r\n')
-- redbean zip assets
Write('<h3>zip assets</h3>\r\n')
paths = GetZipPaths()
if #paths > 0 then
Write('<ul>\r\n')
for i = 1,#paths do
Write('<li>\r\n')
Write('<a href="')
Write(EscapeHtml(EscapePath(paths[i])))
Write('">')
Write(EscapeHtml(VisualizeControlCodes(paths[i])))
Write('</a>')
if IsHiddenPath(paths[i]) then
Write(' <small>[HIDDEN]</small>')
end
if not IsAcceptablePath(paths[i]) then
Write(' <small>[BLOCKED]</small>')
end
if not IsCompressed(paths[i]) then
Write(' <small>[UNCOMPRESSED]</small>')
end
if (GetAssetMode(paths[i]) & 0xF000) == 0x4000 then
Write(' <small>[DIRECTORY]</small>')
end
Write('<br>\r\n')
Write('Modified: ')
Write(FormatHttpDateTime(GetLastModifiedTime(paths[i])))
Write('<br>\r\n')
Write('Mode: ')
Write(string.format("0%o", GetAssetMode(paths[i])))
Write('<br>\r\n')
Write('Size: ')
Write(tostring(GetAssetSize(paths[i])))
Write('<br>\r\n')
if GetComment(paths[i]) then
Write('Comment: ')
Write(EscapeHtml(VisualizeControlCodes(GetComment(paths[i]))))
Write('<br>\r\n')
end
Write('\r\n')
end
Write('</ul>\r\n')
else
Write('<p><em>none</em>\r\n')
end
end
main()