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ajax cross domain request by POST method with content type application/json skipping preflight OPTIONS request

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I there a way to do this?

The problem is server doesn't respond header

Access-Control-Allow-Headers: content-type

But i need to specify content-type: application/json
As a consequence, when browser send preflight options request, i have message error in console like this

Request header field Content-Type is not allowed by Access-Control-Allow-Headers

When i use Postman(chrome extension) and send the same post request to the same server, then all fine: in network tab i don't see preflight options request, but only one post request with status OK. I copied my javascript code, which send this request, into the console in open Postman page. I invoke it and then all fine too. Why in Postman page preflight request is omitted? How they to this?

Thanks a lot for any advance!

Dmitry

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ajax cross domain request by POST method with content type application/json skipping preflight OPTIONS request dmitry.steblyuk@axibase.com - 2012-12-27 04:45 -0800
  Re: ajax cross domain request by POST method with content type application/json skipping preflight OPTIONS request Danny <dann90038@gmail.com> - 2012-12-27 12:03 -0800

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