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I need to redirect a user to an external site though a POST request.
The only option I figured out is to do it submit a form through JavaScript.
Any ideas?
957
in response to a POST request. Rather, the RFC simply states that the browser should alert the user and present an option to proceed or to cancel without reposting data to the new location. Unless you write complex server code, you can't force POST redirection and preserve posted data.
It's not quite clear what you mean, so let's take a few scenarios:
User should POST form to a server other than your own
Easy, just specify the target as the form action:
<form action="http://someotherserver.com" method="post"> User should be redirected after a successful POST submit
Easy, accept and process the POST data as usual, then respond with a 302 or 303 redirect header.
User should POST data to your server and, after validation, you want to POST that data to another server
Slightly tricky, but three options:
307 redirect, which means the user should attempt the same request at another address. Theoretically it means the browser should POST the same data to another server. I'm not quite sure how well supported this is, but any browser understanding HTTP1.1 should be able to do it. AFAIA it's not used that often in practice.See here for a list of all HTTP redirection options: http://en.wikipedia.org/wiki/Http_status_codes#3xx_Redirection
51
Just set HTML form's action URL to the particular external site.
Here's an SSCCE, just copy'n'paste'n'run it:
<!doctype html> <html lang="en"> <head> <title>SO question 2604530</title> </head> <body> <form action="http://stackoverflow.com/questions/2604530/answer/submit" method="post"> <textarea name="post-text"></textarea> <input type="submit" value="Post Your Answer"> </form> </body> </html> You'll see that Stackoverflow has good CSRF protection ;)
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