Hi all,
I'd need to write a very simple reverse proxy and I'm wondering what's
the best way to do it in racket. I don't have any requirements but
performance (not even security and reliability, since I'm writing
basically a testing tool).
I came out with this solution (using http-sendrecv/url). It seems
working properly for everything but redirects:
(define (handle-file-request req)
(define uri (request-uri req))
(define method (request-method req))
(define post-data (request-post-data/raw req))
(define proxy-headers
(map
(lambda (h) (bytes-append (header-field h) #": " (header-value h)))
(filter (lambda (h) (not (bytes=? (header-field h) #"Host"))) headers)))
(let-values
([(status headers in)
(http-sendrecv/url
(struct-copy url uri [scheme remote-scheme)] [host
remote-host] [port remote-port])
#:method method
#:headers proxy-headers
#:data post-data)])
(let ([mime (findf identity (map (lambda (h) (extract-field
#"content-type" h)) headers))])
(response
200 #"OK"
(current-seconds) (if mime mime #"text/javascript; charset=UTF-8")
empty
(λ (client-out) (write-bytes (port->bytes in) client-out)))))
Do you think is this one the right way or do you think there is a
better (cleaner/more performing) approach? Any idea about how to
manage redirects if not manually?
Thanks,
Andrea
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