What is 406-Not Acceptable Response in HTTP

Question

In my Ruby on Rails application I tried to upload an image through the POSTMAN REST client in Base64 format  When I POST the image I am getting a 406 Not Acceptable Response  When I checked my database  the image was there and was successfully saved   What is the reason for this error  is there anything I need to specify in my header   My request   URL ---    http   localhost 3000 exercises json  Header   Content-Type  -  application json   Raw data          exercise              subbodypart ids                  1                2                      name    Exercise14              image file name    Pressurebar Above jpg        image         base64 Format

User · Answer

You can also receive a 406 response when invalid cookies are stored or referenced in the browser - for example, when running a Rails server in Dev mode locally.

If you happened to run two different projects on the same port, the browser might reference a cookie from a different localhost session.

This has happened to me...tripped me up for a minute. Looking in browser > Developer Mode > Network showed it.

User · Answer

406 Not Acceptable           The resource identified by the request is only capable of generating response entities which have content characteristics not   acceptable according to the accept headers sent in the request    406 happens when the server cannot respond with the accept-header specified in the request  In your case it seems application json for the response may not be acceptable to the server

User · Answer

You mentioned you re using Ruby on Rails as a backend  You didn t post the code for the relevant method  but my guess is that it looks something like this   def create   post   Post create params  post    respond to do  format      format json   render  json   gt  post     end end   Change it to   def create   post   Post create params  post     render  json   gt  post end   And it will solve your problem  It worked for me

User · Answer

Your operation did not fail   Your backend service is saying that the response type it is returning is not provided in the Accept HTTP header in your Client request   Ref  http   en wikipedia org wiki List of HTTP header fields   Find out the response  content type  returned by Service  Provide this  content type  in your request Accept header    http   en wikipedia org wiki HTTP status code -  406

User · Answer

Sometimes  this can mean that the server had an internal error  and wanted to respond with an error message  ex  500 with JSON payload  but since the request headers didn t say it accepted JSON  it returns a 406 instead   Go figure   in this case  spring boot webapp    In which case  your operation did fail   But the failure message was obscured by another

User · Answer

In my case for a API in  NET-Core  the api is set to work with XML  by default is set to response with JSON   so I add this annotation in my Controller      Produces  application xml    public class MyController   ControllerBase         Thank you for putting me on the path

User · Answer

In my case  I added   Content-Type  application x-www-form-urlencoded   solved my problem completely

User · Answer

If you are using  request js  you might use the following   var options       url   localhost     method   GET     headers       Accept               request options  function  error  response  body

User · Answer

const request   require  request     const headers          Accept               User-Agent    request       const options         url   https   example com users 6       headers   headers     request get options   error  response  body    gt        console log response body

[json] What is "406-Not Acceptable Response" in HTTP?

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