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buuuudzik · (This post was last modified: 05.10.2018, 20:35 by buuuudzik.)

My client has on his house HIKVision cameras and I am so impressed about its quality and also modern webserver and API. But it is fresh software so I must update my scripts to support such cameras. I found that I cannot download an image in same way as before in BCS cameras. I have right path:
http://username:password@ip_address:port/ISAPI/Streaming/channels/102/picture

and it's work perfectly on webbrowser but unfortunately not in script.

This is my script:

Code:
require('socket.http')

local image1 = socket.http.request('http://username:password@ip_address:port/ISAPI/Streaming/channels/102/picture')

log(#image1)

And it logs that length of image1 is nil.

I've found this specification:
http://down.dipol.com.pl/Cctv/-Hikvision...ervice.pdf

I've had similar differences when I've tried get image from old BCS camera and new HIK by Postman app and I've figured out that on HIK cameras autentification must be set to Digest Auth. How can I do it in Lua?

buuuudzik · (This post was last modified: 05.10.2018, 21:47 by buuuudzik.)

Also I see that there is possibility to download uptodate list or have connection with camera and get notified when new event occured but it is not so easy to me. In node js all would be easy but how use this function in Lua?

http://www.ragingcomputer.com/2016/06/hi...ng-node-js

Perfect would if admin could give some short start guide how get the data(without parsing) like in nodejs:
https://github.com/ragingcomputer/node-h...kvision.js

***admin*** · 06.10.2018, 05:01

Try code for digest auth in this post: https://forum.logicmachine.net/showthrea...64#pid9364

buuuudzik · (This post was last modified: 06.10.2018, 06:19 by buuuudzik.)

(06.10.2018, 05:01)admin Wrote: Try code for digest auth in this post: https://forum.logicmachine.net/showthrea...64#pid9364

It works in local with http. I see that the library is not a 4 line code Wink

Thanks

And what do you think admin about this alertStream?

I think this could be a very good option to integrate e.g. linedetection or facedetection from so sharp camera.

***admin*** · 09.10.2018, 06:26

Try this for alert stream:

Code:
socket = require('socket')

mime = require('mime')

host = '192.168.1.2'

port = 80

auth = 'user:password'

init = 'GET /ISAPI/Event/notification/alertStream HTTP/1.1\r\n' ..

'Host: ' .. host .. ':' .. port .. '\r\n' ..

'Authorization: Basic ' .. mime.b64(auth) .. '\r\n' .. 

'Accept: multipart/x-mixed-replace\r\n\r\n'

sock = socket.tcp()

sock:settimeout(60)

res, err = sock:connect(host, port)

if res then

  alert('connection ok')

  sock:send(init)

  line, err = sock:receive('*l')

  log(line, err)

else

  alert('connection failed: ' .. tostring(err))

end

buuuudzik · 09.10.2018, 07:11

Today I will check for sure. Very thanks and this is really nice feature Wink

buuuudzik · 09.10.2018, 14:16

I have the info that module socket.mime not found

***admin*** · 09.10.2018, 14:36

Replace it with require('mime')

buuuudzik · 09.10.2018, 14:45

This script should be in resident 0s? Now I have it in resident 10s and updated version returns in Alerts "connection failed: nil"

***admin*** · 09.10.2018, 15:35

I've updated the script, try again. Use a resident script with sleep time more than zero for testing, otherwise you might get too many alerts/logs.

buuuudzik · 09.10.2018, 16:33

Now is unauthorized message:

Code:
* arg: 1

  * string: HTTP/1.1 401 Unauthorized

* arg: 2

  * nil

I'm sure I have right credentials Wink

***admin*** · 09.10.2018, 16:50

Replace *l with *a and post the whole output.

buuuudzik · 09.10.2018, 17:30

Below whole result:

Code:
* arg: 1

  * string: HTTP/1.1 401 Unauthorized

Date: Tue, 09 Oct 2018 19:29:04 GMT

Server: App-webs/

Content-Length: 178

Content-Type: text/html

Connection: close

WWW-Authenticate: Digest qop="auth", realm="IP Camera(13656)", nonce="4e3245794d444a684f6a56684e47526b5a575179", stale="FALSE"

<!DOCTYPE html>

<html><head><title>Document Error: Unauthorized</title></head>

<body><h2>Access Error: 401 -- Unauthorized</h2>

<p>Authentication Error</p>

</body>

</html>

* arg: 2

  * nil

***admin*** · 10.10.2018, 10:22

This means that you need to use digest auth here as well. Considering the code complexity, writing any examples without access to the real device is like shooting in the dark, sorry.

buuuudzik · 10.10.2018, 11:00

(10.10.2018, 10:22)admin Wrote: This means that you need to use digest auth here as well. Considering the code complexity, writing any examples without access to the real device is like shooting in the dark, sorry.

Thanks for your efforts. I can give you an access to the real device via private message.

***admin*** · 10.10.2018, 11:51

Try this, change IP, port, user and pass as needed. If this works correctly, you should get xml payloads in Logs tab, otherwise errors will go to Alerts tab.

Code:
require('socket')

md5sum = require('encdec').md5

host = '192.168.1.2'

port = 80

user = 'username'

pass = 'password'

uri = '/ISAPI/Event/notification/alertStream'

function getheader(resp, header)

  local st, en

  header = header .. '="'

  st = resp:find(header)

  if st then

    en = resp:find('"', st + #header)

    if en then

      return resp:sub(st + #header, en - 1)

    end

  end

end

function makedigestheader(headers)

  local digest = {}

  for _, header in ipairs(headers) do

    if not header.unquote then

      header[ 2 ] = '"' .. header[ 2 ] .. '"'

    end

    digest[ #digest + 1 ] = header[ 1 ] .. '=' .. header[ 2 ]

  end

  return 'Digest ' .. table.concat(digest, ', ')

end

function hash(...)

  return md5sum(table.concat({...}, ':'))

end

init = {

  'GET ' .. uri .. ' HTTP/1.1',

  'Host: ' .. host,

  'Accept: multipart/x-mixed-replace',

}

sock = socket.tcp()

sock:settimeout(60)

res, err = sock:connect(host, port)

if not res then

  alert('init connection failed: ' .. tostring(err))

  return

end

sock:send(table.concat(init, '\r\n') .. '\r\n\r\n')

resp, err = sock:receive('*a')

sock:close()

if not resp then

  alert('no response: ' .. tostring(err))

  return

end

realm = getheader(resp, 'realm')

nonce = getheader(resp, 'nonce')

if not realm or not nonce then

  alert('no realm/nonce')

  return

end

nc = '00000001'

cnonce = string.format('%08x', os.time())

method = 'GET'

response = hash(

  hash(user, realm, pass),

  nonce,

  nc,

  cnonce,

  'auth',

  hash(method, uri)

)

auth = {

  { 'username', user },

  { 'realm', realm },

  { 'nonce', nonce },

  { 'uri', uri },

  { 'cnonce', cnonce },

  { 'nc', nc, unquote = true },

  { 'qop', 'auth' },

  { 'algorithm', 'MD5' },

  { 'response', response },

}

table.insert(init, 2, 'Authorization: ' .. makedigestheader(auth))

sock = socket.tcp()

sock:settimeout(60)

res, err = sock:connect(host, port)

if not res then

  alert('data connection failed: ' .. tostring(err))

  return

end

sock:send(table.concat(init, '\r\n') .. '\r\n\r\n')

cl = 'Content-Length:'

while true do

  line, err = sock:receive('*l')

  if line then

    if line:find(cl, 1, true) then

      len = tonumber(line:sub(#cl + 1))

      if len then

        sock:receive('*l') -- skip empty line

        data, err = sock:receive(len)

        if data then

          log(data)

        else

          alert('data receive failed: ' .. tostring(err))

        end

      end

    end

  else

    alert('line receive failed: ' .. tostring(err))

    break

  end

end

sock:close()

buuuudzik · 10.10.2018, 12:33

It works I see such output:

Code:
* string: <EventNotificationAlert version="2.0" xmlns="http://www.hikvision.com/ver20/XMLSchema">

<ipAddress>192.168.101.201</ipAddress>

<portNo>80</portNo>

<protocol>HTTP</protocol>

<macAddress>aa:bb:cc:dd:ee:ff</macAddress>

<channelID>1</channelID>

<dateTime>2018-10-10T14:31:43+01:00</dateTime>

<activePostCount>0</activePostCount>

<eventType>videoloss</eventType>

<eventState>inactive</eventState>

<eventDescription>videoloss alarm</eventDescription>

<channelName>K03 Podjazd</channelName>

</EventNotificationAlert>

I will find how to parse it. Thank you very much, you are very wise Wink

Alberto.ricof · (This post was last modified: 28.05.2020, 14:45 by Alberto.ricof.)

Hello,

I rescue this thread to see if anyone can help me,

How can I find the values in the XML data that the string returns? specifically what I need are the ones marked in yellow in the attached screenshot. These records are only sent if: <statisticalMethods> realTime </statisticalMethods>

Thank you very much in advance !!

Best regards

Erwin van der Zwart · 28.05.2020, 21:16

Hi,

You need to parse the XML data to get values from it, you can use the build in LuaExpat lib for that.

See this post for a sample how to use the lpx parser: https://forum.logicmachine.net/showthrea...2#pid11472

BR,

Erwin

Alberto.ricof · 29.05.2020, 11:43

(28.05.2020, 21:16)Erwin van der Zwart Wrote: Hi,

You need to parse the XML data to get values from it, you can use the build in LuaExpat lib for that.

See this post for a sample how to use the lpx parser: https://forum.logicmachine.net/showthrea...2#pid11472

BR,

Erwin

Thank you very much Erwin, it's just what i needed.

BR,

Alberto R.

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