Browse code
feat: gemini client
Ed Langley authored on 01/09/2020 02:30:43Showing 1 changed files
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+(defpackage :gemini.client |
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+ (:use :cl)) |
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+(in-package :gemini.client) |
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+ |
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+(defun ssl-connection (host port) |
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+ (flexi-streams:make-flexi-stream |
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+ (comm:open-tcp-stream host port :ssl-ctx t) |
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+ :external-format :utf-8)) |
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+ |
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+(defun crlf (s) |
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+ (princ #\return s) |
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+ (princ #\newline s)) |
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+ |
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+(defun request (uri s) |
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+ (puri:render-uri uri s) |
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+ (crlf s)) |
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+ |
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+(fw.lu:defclass+ link () |
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+ ((url :initarg :url :reader url) |
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+ (text :initarg :text :reader text)))) |
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+(defmethod print-object ((it link) s) |
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+ (print-unreadable-object (it s :type t :identity t) |
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+ (format s "target: ") |
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+ (puri:render-uri (url it) s)) |
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+ |
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+(defun parse-link (base-uri line) |
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+ (let* ((raw (subseq line 2)) |
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+ (raw (serapeum:trim-whitespace raw)) |
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+ (split (split-sequence:split-sequence-if #'serapeum:whitespacep raw))) |
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+ (destructuring-bind (first . rest) split |
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+ (link (puri:merge-uris (puri:uri first) |
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+ base-uri) |
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+ (when rest (car rest)))))) |
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+ |
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+(defun gemini (uri s) |
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+ (let* ((uri (puri:uri uri)) |
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+ (buffer (make-string 1024 :element-type 'character))) |
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+ (with-open-stream (conn (ssl-connection (puri:uri-host uri) 1965)) |
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+ (request uri conn) |
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+ (finish-output conn) |
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+ (loop for read = (read-line buffer conn) |
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+ while (= read (length buffer)) |
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+ do (write-sequence buffer s) |
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+ finally (write-sequence buffer conn :end read)) |
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+ uri))) |
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+ |
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+(defun gemini-byline (uri s) |
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+ (let* ((uri (puri:uri uri)) |
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+ (links ())) |
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+ (with-open-stream (conn (ssl-connection (puri:uri-host uri) 1965)) |
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+ (request uri conn) |
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+ (finish-output conn) |
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+ (loop with preformatted = nil |
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+ for read = (read-line conn nil) |
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+ while read |
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+ do |
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+ (write-sequence read s) |
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+ (terpri s) |
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+ when (equal read "```") do (setf preformatted (not preformatted)) |
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+ when (and (not preformatted) (> (length read) 2) (equal (subseq read 0 2) "=>")) |
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+ do (push (parse-link uri read) links)) |
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+ (values uri links)))) |
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