Forum Discussion

PablitoFP's avatar
PablitoFP
Icon for Nimbostratus rankNimbostratus
Jan 18, 2019

Please help with monitor doing a post!!!

Hi guys, I need your help please. I need to configure a monitor to do a post and get a 204, but it is not working. If I do a curl like this, I get the http 204 that I am looking: curl -X POST -sL...
application delivery
BIG-IP
http post
monitor
Stanislas_Piro2's avatar
Stanislas_Piro2
Icon for Cumulonimbus rankCumulonimbus
Jan 19, 2019

Hi,

before writing a monitor, you must know how the request is sent:

POST /api/rest/checks/v0/void HTTP/1.1
Host: 192.168.2.34
Accept: */*
Authorization: Basic ZjUZjjU=
Content-Type: application/json
Content-Length: 12

{"data": ""}

The POST data are always after a blank line without any content

You must replace any new line by 

\r\n
, and don't add a space before new lines : 
ZjUZjjU= \r\n
is wrong because on the space before 
\r\n

the monitor string must be :

POST /api/rest/checks/v0/void HTTP/1.1\r\nHost: 192.168.2.34\r\nAccept: */*\r\nAuthorization: Basic ZjUZjjU=\r\nContent-Type: application/json\r\nContent-Length: 12\r\n\r\n{"data": ""}

try first the send string syntax from bigip with this:

SEND_STRING='POST /api/rest/checks/v0/void HTTP/1.1\r\nHost: 192.168.2.34\r\nAccept: */*\r\nAuthorization: Basic ZjUZjjU=\r\nContent-Type: application/json\r\nContent-Length: 12\r\n\r\n{"data": ""}'
(echo -ne $SEND_STRING; cat) | nc 192.168.2.34 80

You can look at this link on how to check monitor syntax and get response data to build monitor receive string.