Seems to me like it would be simpler and more straightforward to have the user's request submitted to your code, then have your code make an identical request to the other site.
But it also seems likely that another approach could work better, thus going back to ikegami's suggestion that this may be an XY Problem. | [reply] |
If it is not important which server responds to the client, you can have the form action pointing to your script. There you can do what you need to, and then post a request to the other server's script with LWP, and then send a response back to the client.
If GET is used, you can issue a redirect from your scripts' response, and no more worries. If POST is used, then the redirect may cause the browser to ask users' permission to repost the form, and this may or may not be of a concern. If it is of concern, then you need to do some sort of work-around to accomplish that, and the AJAX solution could get you going.
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