Prevent comment form re-submission
- by Rob
I'm got a comment form for an article and i'd to prevent re-submission. I notice that Worpdress handles this very well (going back doesn't cause the browser to request a form re-submission), but I can't figure out how they do it, even though our methods are very similar.
My Script
User visits mydomain.com/article/1/article_title.html
Fills in a form which posts to mydomain.com/addnewcomment/1.html
I then do a 302 redirect back to mydomain.com/article/1/article_title.html
Now if I press back from this position it doesn't request a redirect. However, if I go to another page e.g. mydomain.com/tag/1/my_tag.html and press back it does resubmit the form.
Obviously I want to prevent this.
What Wordpress does
User visits mydomain.com/?p=1
Fills in a form which posts to mydomain.com/wp-comments-post.php
This then does a 302 redirect back to mydomain.com/?p=1
Pressing back or visiting another page and pressing back doesn't cause a re-submission.
I've had a look through the WP code but I can't see how they manage this. Obviously it's something i'd like to achieve.
Does anyone have any thoughts on where I may be going wrong?
(I'm only using Wordpress as an example to prove that it's possible, obviously i'm not trying to exactly duplicate WP, that would be pointless)
