User agent with fetch tool

RouterOS Scripting
1

Using the following code to try and update my Google DDNS record with current IP, everything seems to work correctly with communicating with Google but Google returns a “badagent” error since the request needs to send a valid user agent to be accepted by Google. How can I set and/or customize a user agent that is sent with the fetch tools URL request?

# Variables
# Username and password are the long cryptic ones Google Domains provides,
# not your regular Google account ones
:local GoogleDNSUsername "gbML26UKGdjm7Oz1"
:local GoogleDNSPassword "ASmwlKjCAkEywaZC"
:local hostName "test.twinstar5.com"
:local currentIP ""
:local setResults ""
:local previousIP ""

# Script
:set currentIP [/ip cloud get public-address]
:set previousIP [:resolve "$hostName"]

:if ($currentIP != $previousIP) do={
:do {
/tool fetch url="https://$GoogleDNSUsername:$GoogleDNSPassword@domains.google.com/nic/update?hostname=$hostName&myip=$currentIP" mode=https dst-path=GoogleDNS.txt
:set setResults [/file get GoogleDNS.txt contents];
:log info ("GoogleDNS said this: $setResults")
} on-error={ 
:log error ("GoogleDNS: script failed to set new IP address") 
}
}
2

I’m in the same boat and get the same error, did you manage to find a fix for this?

Cheers,
Tugsynz

3

No, unfortunately. I still don’t believe there is a way to add or customize a user agent for requests, although I have not tried to do it again on the latest versions of Router OS.

4 
/ tool fetch http-header-field="User-Agent: Mozilla/4.0" ...
5

/tool fetch url=“http://example.com/” http-header-field=“User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0”

HTTP_USER_AGENT: Mikrotik/6.x Fetch, Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0
Seems to be no chance to replace, just add to “Mikrotik/6.x Fetch”

6

Sorry to resurrect an old thread but how did you get it to append? I used that exact line and it came back as ‘Mikrotik/6.x Fetch’ I’m on 6.47.1


Command:
/tool fetch url="http://postman-echo.com/get" http-header-field="User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0"

Results:
{"args":{},"headers":{"x-forwarded-proto":"http","x-forwarded-port":"80","host":"postman-echo.com","x-amzn-trace-id":"Root=1-5f1f0b8a-fc7505a8e28e38802ca59cf8","user-agent":"Mikrotik/6.x Fetch"},"url":"http://postman-echo.com/get"}

http://postman-echo.com/get just returns what it gets

7

Just use http-header-field="user-agent: useragent"

> :put ([/tool fetch url="http://postman-echo.com/get" http-header-field="user-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0" output=user]->"data")
      status: finished
  downloaded: 0KiBC-z pause]
        data: { "args": {}, "headers": { "x-forwarded-proto": "http", "x-forwarded-port": "80", "host": "postman-echo.com", "x-amzn-trace-id": "Root=1-6511a09c-59322be6549949c957d1ae2c", "user-agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0" }, "url": "http://postman-echo.com/get" }