javascript - How to return data directly to a client who queried via an intermediate server -

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i'm trying figure out way of taking shortcut in following process:

  1. client side javascript sends xmlhttprequest a.com/core.php
  2. core.php requests data b.com/api.php via file_get_contents()
  3. data sent b.com a.com
  4. data sent a.com client

the process works flawlessly, seems me there optimization potential in way data returned client - passing data via a.com serves no practical purpose.

is there way make b.com send data directly client? , if so, information has passed a.com b.com?

diagram clarification: enter image description here


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