mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
116 lines
4.3 KiB
Lua
116 lines
4.3 KiB
Lua
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-- webserver within a webserver demo
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-- we must go deeper!
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local unix = require 'unix'
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function OnTerm(sig)
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-- prevent redbean core from writing a response
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unix.write(mainfd, 'redbean is shutting down\r\n')
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unix.close(mainfd)
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end
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function main()
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if IsClientUsingSsl() then
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ServeError(400)
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return
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end
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mainfd = GetClientFd()
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mainip = GetRemoteAddr()
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unix.sigaction(unix.SIGTERM, OnTerm)
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unix.write(mainfd, 'HTTP/1.0 200 OK\r\n' ..
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'Date: '.. FormatHttpDateTime(GetDate()) ..'\r\n' ..
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'Content-Type: text/html; charset=utf-8\r\n' ..
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'Connection: close\r\n' ..
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'Server: redbean unix\r\n' ..
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'\r\n' ..
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'<!doctype html>\r\n' ..
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'<title>redbean</title>\r\n' ..
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'<h3>webserver within a webserver demo</h3>\r\n')
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addrs = {}
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servers = {}
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pollfds = {}
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pollfds[mainfd] = unix.POLLIN
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ifs, errno = unix.siocgifconf()
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for i = 1,#ifs do
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if (IsLoopbackIp(mainip) and (IsPublicIp(ifs[i].ip) or
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IsPrivateIp(ifs[i].ip) or
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IsLoopbackIp(ifs[i].ip))) or
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(IsPrivateIp(mainip) and (IsPublicIp(ifs[i].ip) or
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IsPrivateIp(ifs[i].ip))) or
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(IsPublicIp(mainip) and IsPublicIp(ifs[i].ip))
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then
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server = unix.socket()
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unix.bind(server, ifs[i].ip)
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unix.listen(server)
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ip, port = unix.getsockname(server)
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addr = string.format('%s:%d', FormatIp(ip), port)
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url = string.format('http://%s', addr)
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Log(kLogInfo, string.format('listening on %s', addr))
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unix.write(mainfd, string.format(
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'listening on <a target="_blank" href="%s">%s</a><br>\r\n',
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url, url))
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pollfds[server] = unix.POLLIN | unix.POLLHUP
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servers[server] = true
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addrs[server] = addr
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end
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end
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while true do
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evs, errno = unix.poll(pollfds)
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if not evs then
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break
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end
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for fd,revents in pairs(evs) do
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if fd == mainfd then
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data, errno = unix.read(mainfd)
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if not data then
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Log(kLogInfo, string.format('got %s from parent client', unix.strerrno(errno)))
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-- prevent redbean core from writing a response
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unix.exit(1)
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end
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if #data == 0 then
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Log(kLogInfo, 'got hangup from parent client')
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Log(kLogInfo, 'closing server')
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-- prevent redbean core from writing a response
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unix.exit(0)
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end
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-- echo it back for fun
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unix.write(mainfd, data)
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elseif servers[fd] then
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unix.write(mainfd, string.format('preparing to accept from %d<br>\r\n', fd))
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client, clientip, clientport = unix.accept(fd)
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unix.write(mainfd, string.format('preparing to accept from %d<br>\r\n', fd))
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addr = string.format('%s:%d', FormatIp(clientip), clientport)
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addrs[client] = addr
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unix.write(mainfd, string.format('got client %s<br>\r\n', addr))
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pollfds[client] = unix.POLLIN
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evs[server] = nil
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else
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unix.write(mainfd, string.format('preparing to read from %d<br>\r\n', fd))
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data = unix.read(fd)
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unix.write(mainfd, string.format('done reading from %d<br>\r\n', fd))
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if data and #data ~= 0 then
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unix.write(mainfd, string.format('got %d bytes from %s<br>\r\n', #data, addrs[fd]))
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unix.write(fd, 'HTTP/1.0 200 OK\r\n' ..
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'Date: '.. FormatHttpDateTime(GetDate()) ..'\r\n' ..
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'Content-Type: text/html; charset=utf-8\r\n' ..
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'Connection: close\r\n' ..
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'Server: redbean unix\r\n' ..
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'\r\n' ..
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'<!doctype html>\r\n' ..
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'<title>redbean</title>\r\n' ..
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'<h3>embedded webserver demo</h3>\r\n' ..
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'hello! this is a web server embedded in a web server!\r\n')
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end
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unix.close(fd)
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pollfds[fd] = nil
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end
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end
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end
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end
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main()
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