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codydearkland_2's avatar
codydearkland_2
Icon for Nimbostratus rankNimbostratus
Jun 08, 2016
Solved

Error - POSTMAN REST Client - Google Chrome - "Found invalid content-type. The content-type must be application/json" - Header IS set

Weirdest thing...

 

I'm using POSTMAN to work with the REST Interface on the F5's and im having a heck of a time getting stuff to post.

 

I've set the content-type header to application/json. No dice, I just keep getting - {"code":415,"message":"Found invalid content-type. The content-type must be application/json. The received content-type is 10e18c4c-e066-0ab4-74bd-aa578954ae61","errorStack":[]}

 

Any thoughts? my JSON object is...

 

{ "name": "10.0.0.2:80", "address": "10.0.0.2", "ratio": "1" }

 

I'm able to do that using CLI tools, just not using POSTMAN. Wondering if anyone else has had this problem, and has any nice work arounds for it?

 

application delivery
devops
iControlREST
  • Andrew_Pinder_2's avatar
    Andrew_Pinder_2
    Jun 17, 2016

    FIXED! The issue seems to have been caused by the Postman-Token header confusing the F5 (you can see it using chrome tools network tab) . Somehow the F5 was treating the Postman-Token as the Content-Type header. Disable the Postman-Token header (Settings > General > Headers > "Send Postman Token header") and the request gets through.

     

    You can see the purpose of the Postman-token header here https://www.getpostman.com/docs/settings

     

    Enable chrome tools for postman http://blog.getpostman.com/2014/01/27/enabling-chrome-developer-tools-inside-postman/

     

6 Replies

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  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    Icon for Nacreous rankNacreous
    Jun 09, 2016

    Hi,

     

    sounds it's a bug, if you have a deep look at postman request, you will probably see that by default it set the content type to application/xml. You need to manually specify the Content-Type header with application/json value.

     

    • Andrew_Pinder_2's avatar
      Andrew_Pinder_2
      Icon for Altostratus rankAltostratus
      Jun 17, 2016
      I have inspected the Postman request with the chrome tools network debugger and the Content-Type header certainly looks to be set - but i am getting the same Content-Type error The error message is "The content-type must be application/json. The received content-type is 7f007420-1b79-d546-b274-dbe86805277e" which is the value of the header Postman-Token: "7f007420-1b79-d546-b274-dbe86805277e". Hmmmm
  • Yann_Desmarest's avatar
    Yann_Desmarest
    Icon for Cirrus rankCirrus
    Jun 09, 2016

    Hi,

     

    sounds it's a bug, if you have a deep look at postman request, you will probably see that by default it set the content type to application/xml. You need to manually specify the Content-Type header with application/json value.

     

    • Andrew_Pinder_2's avatar
      Andrew_Pinder_2
      Icon for Altostratus rankAltostratus
      Jun 17, 2016
      I have inspected the Postman request with the chrome tools network debugger and the Content-Type header certainly looks to be set - but i am getting the same Content-Type error The error message is "The content-type must be application/json. The received content-type is 7f007420-1b79-d546-b274-dbe86805277e" which is the value of the header Postman-Token: "7f007420-1b79-d546-b274-dbe86805277e". Hmmmm
  • Andrew_Pinder_2's avatar
    Andrew_Pinder_2
    Icon for Altostratus rankAltostratus
    Jun 17, 2016

    FIXED! The issue seems to have been caused by the Postman-Token header confusing the F5 (you can see it using chrome tools network tab) . Somehow the F5 was treating the Postman-Token as the Content-Type header. Disable the Postman-Token header (Settings > General > Headers > "Send Postman Token header") and the request gets through.

     

    You can see the purpose of the Postman-token header here https://www.getpostman.com/docs/settings

     

    Enable chrome tools for postman http://blog.getpostman.com/2014/01/27/enabling-chrome-developer-tools-inside-postman/