60 lines
2.4 KiB
Racket
60 lines
2.4 KiB
Racket
#lang racket/base
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(provide jsonp-baseurl
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jsonp-rpc!)
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(require racket/match)
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(require racket/format)
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(require racket/port)
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(require net/url)
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(require net/uri-codec)
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(require json)
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(require "sessions.rkt")
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(define jsonp-baseurl (make-parameter #f))
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(define (jsonp-rpc! #:sensitive? [sensitive? #f]
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#:include-credentials? [include-credentials? #t]
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#:post-data [post-data #f]
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site-relative-url
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original-parameters)
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(define s (current-session))
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(if sensitive?
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(log-info "jsonp-rpc: sensitive request ~a" site-relative-url)
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(log-info "jsonp-rpc: request ~a params ~a~a~a"
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site-relative-url
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original-parameters
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(if post-data
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(format " post-data: ~v" post-data)
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"")
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(if include-credentials?
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(if s
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" +creds"
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" +creds(missing)")
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"")))
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(define stamp (~a (inexact->exact (truncate (current-inexact-milliseconds)))))
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(define callback-label (format "callback~a" stamp))
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(define extraction-expr (format "^callback~a\\((.*)\\);$" stamp))
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(define (add-param ps name val) (cons (cons name val) ps))
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(let* ((parameters original-parameters)
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(parameters (if (and include-credentials? s)
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(add-param (add-param parameters 'email (session-email s))
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'passwd (session-password s))
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parameters))
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(parameters (add-param parameters 'callback callback-label)))
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(define baseurl (or (jsonp-baseurl) (error 'jsonp-rpc! "jsonp-baseurl is not set")))
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(define request-url (string->url (format "~a~a?~a"
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baseurl
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site-relative-url
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(alist->form-urlencoded parameters))))
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(define-values (body-port response-headers)
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(if post-data
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(values (post-pure-port request-url post-data)
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'unknown-response-headers-because-post-pure-port-doesnt-return-them)
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(get-pure-port/headers request-url)))
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(define raw-response (port->string body-port))
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(match-define (pregexp extraction-expr (list _ json)) raw-response)
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(define reply (string->jsexpr json))
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(unless sensitive? (log-info "jsonp-rpc: reply ~a" reply))
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reply))
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