[Feature request] Customize Access-Control-Expose-Headers response values for different routes

[yinheli]

I have a requirement. The Access-Control-Expose-Headers response header has different response values on different routes. Currently, the cos.php configuration is uniformly configured, but I don't want to return redundant data like this. So I want to ask if there is any way to achieve this requirement?

Can I submit a PR to modify the method at https://github.com/fruitcake/php-cors/blob/master/src/CorsService.php#L261 so that it first obtains the Access-Control-Expose-Headers response header of $response and then responds by merging $this->exposedHeaders?

[yinheli]

To better express on my thoughts, I submitted a PR. Please help with the review. If there are any better solutions, please point it out. Thanks.

[yinheli]

Hi @barryvdh I want to gently follow up on this issue. Would you have some time to review it when you get a chance?

[yinheli]

Hi @barryvdh. I have made adjustments to this issue again and submitted a Proposal and PR. If you have any suggestions, please leave a message in the PR or Proposal issue. I will close this duplicate issue. Thanks.

Proposal: #29
PR: #27