OpenALPR Webhook Processor for IP Cameras

[biggen]

Ok. Not a problem. I'l port forward it now to test. I'm using a Dahua cam so we will see how it goes.

 

[mlapaglia]

The service is written in c# asp.net core so it would be possible to run it as a windows service/exe, mac, linux, etc. not just docker. i'll look into how to create a windows service in the build pipeline that will make it easier for people who aren't using docker.

If you haven't tried virtualization, you should it's awesome

 

[biggen]

So port forwarding to the container works fine. I get the "Test Succeed 500 code" response from the OpenALPR website webhook test page. I'm not getting anything actually written to the camera overlay after a plate is read. The container is running and I updated the appsettings.json with this:

{
  "AllowedHosts": "*",
  "Cameras": {
    "Cameras": [
      {
        "Manufacturer": "Dahua",
        "OpenAlprCameraId": <ID>,
        "Password": "<password>",
        "UpdateOverlayTextUrl": "http://10.200.200.12:65002/cgi-bin/configManager.cgi?action=setConfig&VideoWidget[0].CustomTitle[1].Text=",
        "Username": "admin"
      },
      }
    ]
  }
}

I'm not sure how to determine the "Digest" authentication mode of the Dahua. I don't see that listed anywhere.

 

[mlapaglia]

I think Dahua only uses digest authentication now, so that shouldn't be an issue. If you look at the docker logs for the running container it outputs debug information. Verify that when you go to

http://10.200.200.12:65002/cgi-bin/...setConfig&VideoWidget[0].CustomTitle[1].Text=

in a browser that you get an authentication prompt, that means you can access that address.

[09:05:56 INF] Route matched with {action = "Post", controller = "WebhookProcessor"}. Executing controller action with signature Void Post(OpenAlprWebhookProcessor.WebhookProcessor.OpenAlprWebhook) on controller OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor (OpenAlprWebhookProcessor).
[09:05:56 INF] request received from: ::ffff:192.168.1.68
[09:05:56 INF] adding job for plate: HF5635
[09:05:56 INF] processing job for plate: HF5635
[09:05:56 INF] Executed action OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor) in 2.8344ms
[09:05:56 INF] Executed endpoint 'OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor)'
[09:05:56 INF] HTTP POST /webhook responded 200 in 3.8108 ms
[09:05:56 INF] Request finished in 4.6247ms 200
[09:06:02 INF] clearing expired overlay for: 106232742

 

[biggen]

I get an "OK" from the webpage when I click that link and input my username/password so I know that works. I'll check the docker logs. Gotta run out for a bit but will pick this up in a while.

 

[mlapaglia]

Also make sure you have text overlays enabled in the camera UI, right now the service won't do that for you.

 

[tech101]

Maybe I will wait for biggen and hopefully some one can walk me thru the setup. I have got the thing installed not sure rite now how to go about configuring it. I can get the port forwarding started for me Does it has to be any specific port ? Also where are we port forwarding to is this going to be the machine/host ip Where docker is installed ? guessing

 

[biggen]

Ok, here is a tail -f of the log:

{"log":"[19:15:14 INF] Request starting HTTP/1.1 POST http://<ip address>:3859/webhook application/json 24405\n","stream":"stdout","time":"2021-01-02T19:15:14.374649987Z"}
{"log":"[19:15:14 INF] Executing endpoint 'OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor)'\n","stream":"stdout","time":"2021-01-02T19:15:14.375403261Z"}
{"log":"[19:15:14 INF] Route matched with {action = \"Post\", controller = \"WebhookProcessor\"}. Executing controller action with signature Void Post(OpenAlprWebhookProcessor.WebhookProcessor.OpenAlprWebhook) on controller OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor (OpenAlprWebhookProcessor).\n","stream":"stdout","time":"2021-01-02T19:15:14.380248317Z"}
{"log":"[19:15:14 INF] request received from: ::ffff:52.201.255.102\n","stream":"stdout","time":"2021-01-02T19:15:14.515617482Z"}
{"log":"[19:15:14 INF] adding job for plate: 776EH\n","stream":"stdout","time":"2021-01-02T19:15:14.516520987Z"}
{"log":"[19:15:14 INF] processing job for plate: 776EH\n","stream":"stdout","time":"2021-01-02T19:15:14.517309471Z"}
{"log":"[19:15:14 ERR] Value cannot be null. (Parameter 'source')\n","stream":"stdout","time":"2021-01-02T19:15:14.518298862Z"}
{"log":"[19:15:14 INF] Executed action OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor) in 136.8566ms\n","stream":"stdout","time":"2021-01-02T19:15:14.520044891Z"}
{"log":"[19:15:14 INF] Executed endpoint 'OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor)'\n","stream":"stdout","time":"2021-01-02T19:15:14.52084357Z"}
{"log":"[19:15:14 INF] HTTP POST /webhook responded 200 in 146.6037 ms\n","stream":"stdout","time":"2021-01-02T19:15:14.52166856Z"}
{"log":"[19:15:14 INF] Request finished in 148.4279ms 200 \n","stream":"stdout","time":"2021-01-02T19:15:14.523152022Z"}

You can see the container is getting the plate from the ALPR webhook. Then it appears to have an error there: Value cannot be null. (Parameter 'source')\n","stream":"stdout","time":"2021-01-02T19:15:14.518298862Z"}

 

[mlapaglia]

biggen can you post your appsettings? obviously remove your credentials.

also, github will now generate packages you can run on windows. go to the releases page download the latest version then from a command line run dotnet .\OpenAlprWebhookProcessor.dll from within that folder. You won't need docker this way. You will need the dotnet core 3.1 runtime for this to work.

 

[biggen]

Sure. Here you go:

{
  "AllowedHosts": "*",
  "Cameras": {
    "Cameras": [
      {
        "Manufacturer": "Dahua",
        "OpenAlprCameraId": 000,
        "Password": "password",
        "UpdateOverlayTextUrl": "http://10.200.200.12/cgi-bin/configManager.cgi?action=setConfig&VideoWidget[0].CustomTitle[1].Text=",
        "Username": "user"
      }
      }
    ]
  }
}

I removed the code for the other cameras and just left the Dahua. Perhaps that is the issue.

 

[mlapaglia]

oof get rid of your password, also it looks like your username/password might me mixed up? is your username really password lol?

only thing i can see there is your json isn't formatted correctly, you have an extra } in there.

I like using Best JSON Formatter and JSON Validator: Online JSON Formatter to validate my json.

 

[biggen]

Ha. changed it!

 

[mlapaglia]

K get rid of the extra } then you should be good

 

[biggen]

Alright. Just restarted the container. Waiting for a car.

Yeah, I should have realized I had too many brackets.

 

[mlapaglia]

If you want, you can also use programs like postman to send a "fake" alert to your service for testing. There is a sample payload in their documentation. Otherwise just wait for a car

 

[biggen]

Still getting this error in the log:

{"log":"[19:46:47 ERR] Value cannot be null. (Parameter 'source')\n","stream":"stdout","time":"2021-01-02T19:46:47.981745156Z"}

Here is the current appsettings.json

{
  "AllowedHosts": "*",
  "Cameras": {
    "Cameras": [
      {
        "Manufacturer": "Dahua",
        "OpenAlprCameraId": 254963574,
        "Password": "password",
        "UpdateOverlayTextUrl": "http://10.200.200.12/cgi-bin/configManager.cgi?action=setConfig&VideoWidget[0].CustomTitle[1].Text=",
        "Username": "admin"
      }
    ]
  }
}

Where is that error generated from? Your code or at the camera?

Let me try to modify the file location of the appsettings.json in the docker cmd line. That may be the issue.

 

[biggen]

Hm... There is this in the docker log:

{"log":"[20:00:08 WRN] Failed to determine the https port for redirect.\n","stream":"stdout","time":"2021-01-02T20:00:08.903529826Z"}
but also still this:
{"log":"[20:00:09 ERR] Value cannot be null. (Parameter 'source')\n","stream":"stdout","time":"2021-01-02T20:00:09.595323567Z"}

So I'm not sure what the issue is. Here is my appsettings.json again:

{
  "AllowedHosts": "*",
  "Cameras": {
    "Cameras": [
      {
        "Manufacturer": "Dahua",
        "OpenAlprCameraId": 0000,
        "Password": "pass",
        "UpdateOverlayTextUrl": "http://10.200.200.12/cgi-bin/configManager.cgi?action=setConfig&VideoWidget[0].CustomTitle[1].Text=",
        "Username": "admin"
      }
    ]
  }
}

Here is the start.sh file I used to kick off the container:

#!/bin/bash

docker run -d \
--name=openalprwebhookprocessor \
--net=bridge \
-v /home/joe/webhook_alpr/app/appsettings.json:/appsettings.json \
-p 3859:80 \
mlapaglia/openalprwebhookprocessor

My appsettings.json full path is indeed /home/joe/webhook_alpr/app/appsettings.json just as its listed in that file.

 

[mlapaglia]

Ok I have added more logging around the area I think it's failing, pull the latest version and try again

 

[biggen]

Just so I'm clear your default container start is:

docker run -d \
--name=openalprwebhookprocessor \
--net=bridge \
-v /app/appsettings.json:/appsettings.json \
-p 3859:80 \
mlapaglia/openalprwebhookprocessor

So the appsettings.json is designed to be placed in /app. So if I'm on Linux the full path is just /app/appsettings.json, correct?

 

[biggen]

Well I don't know. There is the log with the new image:

{"log":"[21:20:12 INF] Now listening on: http://[::]:80\n","stream":"stdout","time":"2021-01-02T21:20:12.151830111Z"}                         
{"log":"[21:20:12 INF] Application started. Press Ctrl+C to shut down.\n","stream":"stdout","time":"2021-01-02T21:20:12.152431156Z"}         
{"log":"[21:20:12 INF] Hosting environment: Production\n","stream":"stdout","time":"2021-01-02T21:20:12.152542626Z"}                         
{"log":"[21:20:12 INF] Content root path: /app\n","stream":"stdout","time":"2021-01-02T21:20:12.152681455Z"}                                 
{"log":"[21:28:05 INF] Request starting HTTP/1.1 POST http://IP:3859/webhook application/json 27688\n","stream":"stdout","time":"2021-01-02T21:28:05.975482668Z"}
{"log":"[21:28:05 WRN] Failed to determine the https port for redirect.\n","stream":"stdout","time":"2021-01-02T21:28:05.985276557Z"}
{"log":"[21:28:06 INF] Executing endpoint 'OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor)'\n","stream":"stdout","time":"2021-01-02T21:28:06.063968085Z"}
{"log":"[21:28:06 INF] Route matched with {action = \"Post\", controller = \"WebhookProcessor\"}. Executing controller action with signature Void Post(OpenAlprWebhookProcessor.WebhookProcessor.OpenAlprWebhook) on controller OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor (OpenAlprWebhookProcessor).\n","stream":"stdout","time":"2021-01-02T21:28:06.175609602Z"}
{"log":"[21:28:06 INF] request received from: ::ffff:54.165.211.244\n","stream":"stdout","time":"2021-01-02T21:28:06.49614601Z"}
{"log":"[21:28:06 INF] adding job for plate: 764RNC\n","stream":"stdout","time":"2021-01-02T21:28:06.502409927Z"}
{"log":"[21:28:06 INF] processing job for plate: 764RNC\n","stream":"stdout","time":"2021-01-02T21:28:06.504295849Z"}
{"log":"[21:28:06 ERR] Value cannot be null. (Parameter 'source')\n","stream":"stdout","time":"2021-01-02T21:28:06.515348019Z"}
{"log":"[21:28:06 INF] Executed action OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor) in 344.5401ms\n","stream":"stdout","time":"2021-01-02T21:28:06.536410993Z"}
{"log":"[21:28:06 INF] Executed endpoint 'OpenAlprWebhookProcessor.WebhookProcessor.WebhookProcessor.Post (OpenAlprWebhookProcessor)'\n","stream":"stdout","time":"2021-01-02T21:28:06.53931824Z"}
{"log":"[21:28:06 INF] HTTP POST /webhook responded 200 in 554.0256 ms\n","stream":"stdout","time":"2021-01-02T21:28:06.547187688Z"}
{"log":"[21:28:06 INF] Request finished in 589.2181ms 200 \n","stream":"stdout","time":"2021-01-02T21:28:06.552650447Z"}

I may not be destined to get this working. I moved the appsettings.json into the /app/ directory as you indicate. Still can't get it working.