/usr/share/uim/http-client.scm is in libuim-data 1:1.8.6+gh20161003.0.d63dadd-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | ;;; http-client.scm: http client library for uim.
;;;
;;; Copyright (c) 2009-2013 uim Project https://github.com/uim/uim
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;; 3. Neither the name of authors nor the names of its contributors
;;; may be used to endorse or promote products derived from this software
;;; without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
;;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
;;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
;;; OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
;;; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
;;; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
;;; OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
;;; SUCH DAMAGE.
;;;;
(require-extension (srfi 1 2 9))
(require "i18n.scm")
(require "socket.scm")
(require "input-parse.scm")
(require "openssl.scm")
(define (http:encode-uri-string str)
(define hex '("0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "A" "B" "C" "D" "E" "F"))
(define (hex-format2 x)
(string-append "%"
(list-ref hex (modulo (/ x 16) 256))
(list-ref hex (modulo x 16))))
(apply
string-append
(map (lambda (c)
(hex-format2 (char->integer c)))
(string->list str))))
(define (http:read-chunk port)
(define (hex-decode str)
(define hex-alist '((#\0 . 0) (#\1 . 1) (#\2 . 2) (#\3 . 3) (#\4 . 4)
(#\5 . 5) (#\6 . 6) (#\7 . 7) (#\8 . 8) (#\9 . 9)
(#\a . 10) (#\A . 10) (#\b . 11) (#\B . 11)
(#\c . 12) (#\C . 12) (#\d . 13) (#\D . 13)
(#\e . 14) (#\E . 14) (#\f . 15) (#\F . 15)))
(let ((n (reverse
(map (lambda (c)
(assq-cdr c hex-alist))
(string->list str)))))
(let loop ((l n)
(sum 0))
(if (null? l)
sum
(loop (map (lambda (x) (* 16 x)) (cdr l))
(+ sum (car l)))))))
(define (http:drop-cr line)
(apply string-append (string-split line "\r")))
(define (http:drop-space line)
(apply string-append (string-split line " ")))
(let loop ((len-str (http:drop-space (http:drop-cr (file-read-line port))))
(rest '()))
(let ((len (guard (err
(else #f))
(hex-decode len-str))))
(if (or (not len) (= len 0))
(apply string-append (reverse rest))
(let ((buf (file-read-buffer port len)))
(file-read-line port) ;; blank
(loop (http:drop-cr (file-read-line port)) (cons buf rest)))))))
(define (http:header-field-search l h)
(find (lambda (x)
(and (string? (car x))
(string-ci=? (car x) h))) l))
(define (http:chunked? l)
(and-let* ((f (http:header-field-search l "transfer-encoding"))
(l (string-split (cdr f) ";"))
(ent (find (lambda (ent)
(string=? "chunked" ent))
l)))
#t))
(define (http:content-length? l)
(and-let* ((ret (http:header-field-search l "content-length")))
(guard (err
(else #f))
(string->number (cdr ret)))))
(define (http:parse-header lines)
(let loop ((lines lines)
(state '(status header))
(rest '()))
(if (null? lines)
(reverse rest)
(call-with-input-string
(car lines)
(lambda (port)
(cond ((eq? 'status (car state))
(let ((version
(find-string-from-port?
"HTTP/"
port))
(version-number
(next-token '(#\space #\.) '(#\space) (N_ "Invalid header")
port))
(status-code
(next-token '(#\space) '(#\space) (N_ "Invalid header") port))
(reason-phrase
(next-token '(#\space) '(#\return *eof*) (N_ "Invalid header") port)))
(loop (cdr lines)
(cdr state)
(cons (cons 'header
(list (cons 'version-number version-number)
(cons 'status-code status-code)
(cons 'reason-phrase reason-phrase)))
rest))))
((eq? 'header (car state))
(let ((field-name
(next-token '(#\space #\tab) '(#\:) (N_ "Invalid header") port))
(field-value
(next-token '(#\: #\space #\tab) '(#\return *eof*) (N_ "Invalid header") port)))
(loop (cdr lines)
state
(cons (cons field-name field-value) rest))))))))))
(define (http:read-header port)
(let loop ((str (file-read-line port))
(rest '()))
(if (or (eof-object? str)
(null? str)
(string=? "\r" str))
(reverse rest)
(loop (file-read-line port) (cons str rest)))))
(define (http:make-request-string request-alist)
(string-append
(apply
string-append
(map (lambda (ent)
(string-append (car ent) ": " (cdr ent) "\n"))
(append request-alist)))
"\n"))
(define-record-type http-proxy
(make-http-proxy hostname port) http-proxy?
(hostname hostname? hostname!)
(port port? port!))
(define (make-http-proxy-from-custom)
(and (eq? http-proxy-setting 'user)
(make-http-proxy http-proxy-hostname http-proxy-port)))
(define-record-type http-ssl
(make-http-ssl method port) http-ssl?
(method method? method!)
(port port? port!))
(define (http:make-proxy-request-string hostname port)
(string-append
(format "CONNECT ~a:~d HTTP/1.1\n\n" hostname port)))
(define (http:make-get-request-string hostname path servname proxy request-alist)
(string-append
(if proxy
(http:make-proxy-request-string hostname servname)
"")
(format "GET ~a HTTP/1.1\n" path)
(format "Host: ~a\n" hostname)
(format "User-Agent: uim/~a\n" (uim-version))
(http:make-request-string request-alist)))
(define (http:get hostname path . args)
(let-optionals* args ((servname 80)
(proxy #f)
(ssl #f)
(request-alist '()))
(let* ((with-ssl? (and (provided? "openssl")
(http-ssl? ssl)
(method? ssl)))
(call-with-open-file-port-function
(if with-ssl?
;; cut
(lambda (file thunk)
(call-with-open-openssl-file-port file (method? ssl) thunk))
call-with-open-file-port))
(file (if (http-proxy? proxy)
(tcp-connect (hostname? proxy) (port? proxy))
(if with-ssl?
(tcp-connect hostname (port? ssl))
(tcp-connect hostname servname)))))
(if (not file)
(uim-notify-fatal (N_ "cannot connect server")))
(call-with-open-file-port-function
file
(lambda (port)
(and-let* ((request (http:make-get-request-string hostname path servname proxy request-alist))
(nr (file-display request port))
(ready? (file-ready? (list (fd? port)) http-timeout))
(proxy-header (if proxy
(http:read-header port)
'()))
(header (http:read-header port))
(parsed-header (http:parse-header header)))
(let ((content-length (http:content-length? parsed-header)))
(cond (content-length
(file-read-buffer port content-length))
((http:chunked? parsed-header)
(http:read-chunk port))
(else
(file-get-buffer port))))))))))
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