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LM as webserver - ERR_INVALID_HTTP_RESPONSE

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LM as webserver - ERR_INVALID_HTTP_RESPONSE
gjniewenhuijse Offline
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Posts: 433
Threads: 89
Joined: Jun 2015
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#1
20.11.2017, 10:35
I have an "old" piece of code that generates a html response for clients that connects to my lm:
http://192.168.x.x:19001/getdata/test

Results:
Chrome : ERR_INVALID_HTTP_RESPONSE
IOS Safari : cancelling load from .... because it is using HTTP/0.9
Internet explorer and Edge works great.

Anyone a solution?


Code:
-- init server handler
if not ready then
 require('copas')

 -- list of client sockets
 clients = {}

 -- incoming data handler
 function datahandler(sock, data)
   local ip, port
   ip, port = sock:getpeername()
     
   -- send reply
   if string.find(data,"GET /getdata/test") then
     sock:send(htmlbody)
   --else
       --log(string.format('[server] data from %s:%d - %s', ip, port, data))
   end
 end

 -- connection handler
 function connhandler(sock)
   -- enable keep-alive to check for disconnect events
   --sock:setoption('keepalive', false)

   local ip, port, data, err, id

   -- get ip and port from socket
   ip, port = sock:getpeername()

   -- client id
   id = string.format('%s:%d', ip, port)
   --log(string.format('[server] connection from %s', id))
        
   -- save socket reference
   clients[ id ] = sock

   -- main reader loop
   while true do
     -- wait for single line of data (until \n, \r is ignored)
     data, err = copas.receive(sock, '*l')
     -- error while receiving
     if err then
       --log(string.format('[server] closed connection from %s:%d', ip, port))
       -- remove socket reference
       clients[ id ] = nil
       return
     end
     -- handle data frame
     datahandler(sock, data)
     if data == "" then
       --log("stop")
       break
     end
   end
 end

 -- bind to port 10001
 tcpserver = socket.bind('*', 19001)

 -- error while binding, try again later
 if not tcpserver then
   os.sleep(5)
   log('[server] error: cannot bind')
 end

 -- set server connection handler
 copas.addserver(tcpserver, connhandler)

 -- create udp server on port 10002
 udpserver = socket.udp()
 udpserver:setsockname('*', 19002)
 udpserver:settimeout(0.1)

 ready = true
end

-- perform server tasks for one second (5 x (0.1 + 0.1))
for i = 1, 5 do
 message = udpserver:receive()
 
 -- got message from udp, send to all active clients
 if message then
   --log("message: " .. message .. " : " .. chartobyte(message))
   for id, sock in pairs(clients) do
     --log("client id: " .. id)
     sock:send(message .. '\r')
   end
 end

 copas.step(0.1)
end

-- all dynamic pages
htmlbody =
"<HTML>\n"..
"\n"..
"<HEAD>\n"..
"<title>Web Communication</title>\n"..
"</HEAD>\n"..
"\n"..
"<BODY>\n"..
"Web Communication \n"..
"<h3>Test</h3>\n"..
"<pre style='white-space:normal;'>"..
"</pre>"..
"<br>"..
"</BODY>\n"..
"\n"..
"</HTML>"
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admin Offline
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Posts: 7288
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Joined: Jun 2015
Reputation: 418
#2
20.11.2017, 10:47
Have you considered using .lp scripts with the main web server, or is the URL fixed on clients?
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gjniewenhuijse Offline
Senior Member
Posts: 433
Threads: 89
Joined: Jun 2015
Reputation: 6
#3
20.11.2017, 10:59
(20.11.2017, 10:47)admin Wrote: Have you considered using .lp scripts with the main web server, or is the URL fixed on clients?

Its a fixed url
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gjniewenhuijse Offline
Senior Member
Posts: 433
Threads: 89
Joined: Jun 2015
Reputation: 6
#4
21.11.2017, 07:11
Can i change something to have working code?
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admin Offline
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Posts: 7288
Threads: 40
Joined: Jun 2015
Reputation: 418
#5
21.11.2017, 07:29
This should work. Another thing is that you probably don't need local UDP server here. If you want to send some dynamic data you can use storage.

Code:
-- init server handler
if not ready then
  require('copas')

  -- all dynamic pages
  htmlbody =
  "<html>\n"..
  "\n"..
  "<head>\n"..
  "<title>Web Communication</title>\n"..
  "</head>\n"..
  "\n"..
  "<body>\n"..
  "Web Communication \n"..
  "<h3>Test</h3>\n"..
  "<pre style='white-space:normal;'>"..
  "</pre>"..
  "<br>"..
  "</body>\n"..
  "\n"..
  "</html>"

  function httpsend(sock, body)
    local resp = 'HTTP/1.1 200 OK\r\nContent-Length: %d\r\nContent-type: text/html\r\nConnection: close\r\n\r\n%s'
    local data = string.format(resp, #body, body)
    return sock:send(data)
  end

  -- list of client sockets
  clients = {}

  -- incoming data handler
  function datahandler(sock, data)
    local ip, port
    ip, port = sock:getpeername()

    -- send reply
    if string.find(data,"GET /getdata/test") then
      httpsend(sock, htmlbody)
    --else
        --log(string.format('[server] data from %s:%d - %s', ip, port, data))
    end
  end

  -- connection handler
  function connhandler(sock)
    -- enable keep-alive to check for disconnect events
    --sock:setoption('keepalive', false)

    local ip, port, data, err, id

    -- get ip and port from socket
    ip, port = sock:getpeername()

    -- client id
    id = string.format('%s:%d', ip, port)
    --log(string.format('[server] connection from %s', id))

    -- save socket reference
    clients[ id ] = sock

    -- main reader loop
    while true do
      -- wait for single line of data (until \n, \r is ignored)
      data, err = copas.receive(sock, '*l')
      -- error while receiving
      if err then
        --log(string.format('[server] closed connection from %s:%d', ip, port))
        -- remove socket reference
        clients[ id ] = nil
        return
      end
      -- handle data frame
      datahandler(sock, data)
      if data == "" then
        --log("stop")
        break
      end
    end
  end

  -- bind to port 10001
  tcpserver = socket.bind('*', 19001)

  -- error while binding, try again later
  if not tcpserver then
    os.sleep(5)
    log('[server] error: cannot bind')
  end

  -- set server connection handler
  copas.addserver(tcpserver, connhandler)

  -- create udp server on port 10002
  udpserver = socket.udp()
  udpserver:setsockname('*', 19002)
  udpserver:settimeout(0.1)

  ready = true
end

-- perform server tasks for one second (5 x (0.1 + 0.1))
for i = 1, 5 do
  message = udpserver:receive()

  -- got message from udp, send to all active clients
  if message then
    --log("message: " .. message .. " : " .. chartobyte(message))
    for id, sock in pairs(clients) do
      --log("client id: " .. id)
      sock:send(message .. '\r')
    end
  end

  copas.step(0.1)
end
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gjniewenhuijse Offline
Senior Member
Posts: 433
Threads: 89
Joined: Jun 2015
Reputation: 6
#6
21.11.2017, 08:03
thanks
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