diff --git a/retropikzel/http.scm b/retropikzel/http.scm new file mode 100644 index 0000000..4888b3f --- /dev/null +++ b/retropikzel/http.scm @@ -0,0 +1,106 @@ +(define line-end "\r\n") +(define (recv-all socket) + (letrec* + ((buffer-size 4000) + (looper (lambda (bytes result) + (if (< (bytevector-length bytes) 4000) + (bytevector-append bytes result) + (looper (socket-recv socket 4000) + (bytevector-append result bytes)))))) + (looper (socket-recv socket 4000) (make-bytevector 0)))) + +(define (read-string-until-eof port) + (letrec* + ((looper (lambda (str result) + (if (eof-object? str) + result + (looper (read-string 4000 port) + (string-append result str)))))) + (looper (read-string 4000 port) ""))) + +(define (string-trim-left str) + (letrec* + ((beyond-whitespace #f) + (looper (lambda (result rest) + (if (null? rest) + (list->string (reverse result)) + (if (and (not beyond-whitespace) + (char-whitespace? (car rest))) + (looper result (cdr rest)) + (begin + (set! beyond-whitespace #t) + (looper (cons (car rest) result) (cdr rest)))))))) + (looper '() (string->list str)))) + +(define (string->status str) + `((http-version ,(string-copy str 0 8)) + (status-code ,(string-copy str 9 12)) + (status-message ,(string-copy str 13)))) + +(define (string->headers str) + (let ((first-punctuation-index 0) + (index -1)) + (string-for-each + (lambda (c) + (set! index (+ index 1)) + (when (and (= first-punctuation-index 0) + (char=? c #\:)) + (set! first-punctuation-index index))) + str) + (list (string-copy str 0 first-punctuation-index) + (string-copy str (+ first-punctuation-index 1))))) + +(define (read-headers port) + (letrec* + ((looper + (lambda (line result) + (if (string=? line "") + result + (looper (read-line port) + (append result + (list (map string-trim-left (string->headers line))))))))) + `(headers ,(looper (read-line port) '())))) + +(define (string->http-response str) + (cond ((not (string? str)) + (error "string->http-reseponse: Argument must be string" str)) + ((and (>= (string-length str) 8) + (string=? (string-copy str 0 8) "HTTP/1.1")) + (display "HERE: str ") + (write str) + (newline) + (let* ((port (open-input-string str)) + (status (string->status (read-line port))) + (headers (read-headers port)) + (body (read-string-until-eof port))) + (append `(,@status ,headers (body ,body))) + )) + (else (error "string->http-response: unsupported HTTP response" str)))) + +(define (http-request url . options) + (let* ((uri (string->uri url)) + (host (uri-host uri)) + (port (cond ((equal? (uri-scheme uri) 'http) (or (uri-port uri) "80")) + ((equal? (uri-scheme uri) 'https) (or (uri-port uri) "443")) + (else (error "http-request: Unknown url scheme" url)))) + (method (cadr (or (assq 'method options) '(#f "GET")))) + (path (or (uri-path uri) "/")) + (socket (make-client-socket host port)) + (request + (string-append + method " " path " HTTP/1.1" line-end + "Host: test" line-end + "Accept: text/html" line-end + line-end)) + (response + (begin + (socket-send socket (string->utf8 request)) + (string->http-response (utf8->string (recv-all socket)))))) + (display "HERE: ") + (write port) + (newline) + (display "HERE: ") + (write (uri-scheme uri)) + (newline) + response + )) diff --git a/retropikzel/http.sld b/retropikzel/http.sld new file mode 100644 index 0000000..188bf85 --- /dev/null +++ b/retropikzel/http.sld @@ -0,0 +1,11 @@ +(define-library + (retropikzel http) + (import (scheme base) + (scheme write) + (scheme char) + (srfi 106) + (chibi uri) + (chibi string) + ) + (export http-request) + (include "http.scm")) diff --git a/retropikzel/http/LICENSE b/retropikzel/http/LICENSE new file mode 100644 index 0000000..0a04128 --- /dev/null +++ b/retropikzel/http/LICENSE @@ -0,0 +1,165 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + + This version of the GNU Lesser General Public License incorporates +the terms and conditions of version 3 of the GNU General Public +License, supplemented by the additional permissions listed below. + + 0. Additional Definitions. + + As used herein, "this License" refers to version 3 of the GNU Lesser +General Public License, and the "GNU GPL" refers to version 3 of the GNU +General Public License. + + "The Library" refers to a covered work governed by this License, +other than an Application or a Combined Work as defined below. + + An "Application" is any work that makes use of an interface provided +by the Library, but which is not otherwise based on the Library. +Defining a subclass of a class defined by the Library is deemed a mode +of using an interface provided by the Library. + + A "Combined Work" is a work produced by combining or linking an +Application with the Library. The particular version of the Library +with which the Combined Work was made is also called the "Linked +Version". + + The "Minimal Corresponding Source" for a Combined Work means the +Corresponding Source for the Combined Work, excluding any source code +for portions of the Combined Work that, considered in isolation, are +based on the Application, and not on the Linked Version. + + The "Corresponding Application Code" for a Combined Work means the +object code and/or source code for the Application, including any data +and utility programs needed for reproducing the Combined Work from the +Application, but excluding the System Libraries of the Combined Work. + + 1. Exception to Section 3 of the GNU GPL. + + You may convey a covered work under sections 3 and 4 of this License +without being bound by section 3 of the GNU GPL. + + 2. Conveying Modified Versions. + + If you modify a copy of the Library, and, in your modifications, a +facility refers to a function or data to be supplied by an Application +that uses the facility (other than as an argument passed when the +facility is invoked), then you may convey a copy of the modified +version: + + a) under this License, provided that you make a good faith effort to + ensure that, in the event an Application does not supply the + function or data, the facility still operates, and performs + whatever part of its purpose remains meaningful, or + + b) under the GNU GPL, with none of the additional permissions of + this License applicable to that copy. + + 3. Object Code Incorporating Material from Library Header Files. + + The object code form of an Application may incorporate material from +a header file that is part of the Library. You may convey such object +code under terms of your choice, provided that, if the incorporated +material is not limited to numerical parameters, data structure +layouts and accessors, or small macros, inline functions and templates +(ten or fewer lines in length), you do both of the following: + + a) Give prominent notice with each copy of the object code that the + Library is used in it and that the Library and its use are + covered by this License. + + b) Accompany the object code with a copy of the GNU GPL and this license + document. + + 4. Combined Works. + + You may convey a Combined Work under terms of your choice that, +taken together, effectively do not restrict modification of the +portions of the Library contained in the Combined Work and reverse +engineering for debugging such modifications, if you also do each of +the following: + + a) Give prominent notice with each copy of the Combined Work that + the Library is used in it and that the Library and its use are + covered by this License. + + b) Accompany the Combined Work with a copy of the GNU GPL and this license + document. + + c) For a Combined Work that displays copyright notices during + execution, include the copyright notice for the Library among + these notices, as well as a reference directing the user to the + copies of the GNU GPL and this license document. + + d) Do one of the following: + + 0) Convey the Minimal Corresponding Source under the terms of this + License, and the Corresponding Application Code in a form + suitable for, and under terms that permit, the user to + recombine or relink the Application with a modified version of + the Linked Version to produce a modified Combined Work, in the + manner specified by section 6 of the GNU GPL for conveying + Corresponding Source. + + 1) Use a suitable shared library mechanism for linking with the + Library. A suitable mechanism is one that (a) uses at run time + a copy of the Library already present on the user's computer + system, and (b) will operate properly with a modified version + of the Library that is interface-compatible with the Linked + Version. + + e) Provide Installation Information, but only if you would otherwise + be required to provide such information under section 6 of the + GNU GPL, and only to the extent that such information is + necessary to install and execute a modified version of the + Combined Work produced by recombining or relinking the + Application with a modified version of the Linked Version. (If + you use option 4d0, the Installation Information must accompany + the Minimal Corresponding Source and Corresponding Application + Code. If you use option 4d1, you must provide the Installation + Information in the manner specified by section 6 of the GNU GPL + for conveying Corresponding Source.) + + 5. Combined Libraries. + + You may place library facilities that are a work based on the +Library side by side in a single library together with other library +facilities that are not Applications and are not covered by this +License, and convey such a combined library under terms of your +choice, if you do both of the following: + + a) Accompany the combined library with a copy of the same work based + on the Library, uncombined with any other library facilities, + conveyed under the terms of this License. + + b) Give prominent notice with the combined library that part of it + is a work based on the Library, and explaining where to find the + accompanying uncombined form of the same work. + + 6. Revised Versions of the GNU Lesser General Public License. + + The Free Software Foundation may publish revised and/or new versions +of the GNU Lesser General Public License from time to time. Such new +versions will be similar in spirit to the present version, but may +differ in detail to address new problems or concerns. + + Each version is given a distinguishing version number. If the +Library as you received it specifies that a certain numbered version +of the GNU Lesser General Public License "or any later version" +applies to it, you have the option of following the terms and +conditions either of that published version or of any later version +published by the Free Software Foundation. If the Library as you +received it does not specify a version number of the GNU Lesser +General Public License, you may choose any version of the GNU Lesser +General Public License ever published by the Free Software Foundation. + + If the Library as you received it specifies that a proxy can decide +whether future versions of the GNU Lesser General Public License shall +apply, that proxy's public statement of acceptance of any version is +permanent authorization for you to choose that version for the +Library. diff --git a/retropikzel/http/README.md b/retropikzel/http/README.md new file mode 100644 index 0000000..774c484 --- /dev/null +++ b/retropikzel/http/README.md @@ -0,0 +1 @@ +HTTP library diff --git a/retropikzel/http/VERSION b/retropikzel/http/VERSION new file mode 100644 index 0000000..6e8bf73 --- /dev/null +++ b/retropikzel/http/VERSION @@ -0,0 +1 @@ +0.1.0 diff --git a/retropikzel/http/test.scm b/retropikzel/http/test.scm new file mode 100644 index 0000000..e2bd554 --- /dev/null +++ b/retropikzel/http/test.scm @@ -0,0 +1,6 @@ + +;(write (http-request "http://snow-fort.org/s/repo.scm")) +;(newline) + +(write (http-request "http://gnu.org")) +(newline)