-- Fetch() API Demo
local function WriteForm(url)
Write([[<!doctype html>
<title>redbean fetch demo</title>
<style>
body { padding: 1em; }
h1 a { color: inherit; text-decoration: none; }
h1 img { border: none; vertical-align: middle; }
input { margin: 1em; padding: .5em; }
pre { margin-left: 2em; }
p { word-break: break-word; max-width: 650px; }
dt { font-weight: bold; }
dd { margin-top: 1em; margin-bottom: 1em; }
.hdr { text-indent: -1em; padding-left: 1em; }
</style>
<h1>
<a href="/"><img src="/redbean.png"></a>
<a href="fetch.lua">redbean fetch demo</a>
</h1>
<p>
Your redbean is able to function as an HTTP client too.
Lua server pages can use the <code>Fetch()</code> API to
to send outgoing HTTP and HTTPS requests to other web
servers. All it takes is a line of code!
</p>
<form action="fetch.lua" method="post">
<input type="text" id="url" name="url" size="70"
value="%s" placeholder="uri" autofocus>
<input type="submit" value="fetch">
</form>
]] % {EscapeHtml(url)})
end
local function main()
if IsPublicIp(GetClientAddr()) then
ServeError(403)
elseif GetMethod() == 'GET' or GetMethod() == 'HEAD' then
WriteForm("https://www.cloudflare.com/robots.txt")
elseif GetMethod() == 'POST' then
status, headers, payload = Fetch(GetParam('url'))
if status then
WriteForm(GetParam('url'))
Write('<dl>\r\n')
Write('<dt>Status\r\n')
Write('<dd><p>%d %s\r\n' % {status, GetHttpReason(status)})
Write('<dt>Headers\r\n')
Write('<dd>\r\n')
for k,v in pairs(headers) do
Write('<div class="hdr"><strong>')
Write(EscapeHtml(k))
Write('</strong>: ')
Write(EscapeHtml(v))
Write('</div>\r\n')
end
Write('<dt>Payload\r\n')
Write('<dd><pre>')
Write(EscapeHtml(VisualizeControlCodes(payload)))
Write('</pre>\r\n')
Write('</dl>\r\n')
else
err = headers
WriteForm(GetParam('url'))
Write('<h3>Error</h3>\n')
Write('<p>')
Write(EscapeHtml(VisualizeControlCodes(err)))
end
else
ServeError(405)
SetHeader('Allow', 'GET, HEAD, POST')
end
end
main()