From f75386b219d1289a140b2fa508cde75a6f8872e0 Mon Sep 17 00:00:00 2001 From: Tim Vaughan Date: Wed, 11 Sep 2019 13:48:20 +0200 Subject: [PATCH] Debugging after refactor: now functional. --- elpher.el | 202 +++++++++++++++++++++++++++--------------------------- 1 file changed, 101 insertions(+), 101 deletions(-) diff --git a/elpher.el b/elpher.el index c22f7b8..3735345 100644 --- a/elpher.el +++ b/elpher.el @@ -1,4 +1,4 @@ -;;; elpher.el --- A friendly gopher client. +;;; elpher.el --- A friendly gopher client. -*- lexical-binding:t -*- ;; Copyright (C) 2019 Tim Vaughan @@ -428,9 +428,6 @@ away CRs and any terminating period." (replace-regexp-in-string "\r" "" string)))) -;;; Index rendering -;; - ;;; Network error reporting ;; @@ -438,12 +435,12 @@ away CRs and any terminating period." (elpher-with-clean-buffer (insert (propertize "\n---- ERROR -----\n\n" 'face 'error) "When attempting to retrieve " (elpher-address-to-url address) ":\n" - (error-message-string the-error) ".\n" + (error-message-string error) ".\n" (propertize "\n----------------\n\n" 'face 'error) "Press 'u' to return to the previous page."))) -;;; Gopher selector retrieval (all kinds) +;;; Gopher selector retrieval ;; (defun elpher-process-cleanup () @@ -511,10 +508,9 @@ up to the calling function." (let* ((address (elpher-node-address elpher-current-node)) (content (elpher-get-cached-content address))) (if (and content (funcall renderer nil)) - (progn - (elpher-with-clean-buffer) - (insert content) - (elpher-restore-pos)) + (elpher-with-clean-buffer + (insert content) + (elpher-restore-pos)) (elpher-with-clean-buffer (insert "LOADING... (use 'u' to cancel)")) (elpher-get-selector address @@ -568,8 +564,8 @@ If ADDRESS is not supplied or nil the record is rendered as an (let* ((type (if address (elpher-address-type address) nil)) (type-map-entry (cdr (assoc type elpher-type-map)))) (if type-map-entry - (let* ((margin-code (elt type-map-entry 1)) - (face (elt type-map-entry 2)) + (let* ((margin-code (elt type-map-entry 2)) + (face (elt type-map-entry 3)) (node (elpher-make-node display-string address))) (elpher-insert-margin margin-code) (insert-text-button display-string @@ -597,8 +593,8 @@ If ADDRESS is not supplied or nil the record is rendered as an (let ((node (button-get button 'elpher-node))) (elpher-visit-node node))) -(defun elpher-render-index (data) - "Render DATA as an index." +(defun elpher-render-index (data &optional mime-type-string) + "Render DATA as an index, MIME-TYPE-STRING is unused" (elpher-with-clean-buffer (if (not data) t @@ -628,24 +624,22 @@ If ADDRESS is not supplied or nil the record is rendered as an 'help-echo (elpher-node-button-help node)))) (buffer-string))) -(defun elpher-render-text (data) - "Render DATA as text." +(defun elpher-render-text (data &optional mime-type-string) + "Render DATA as text, MIME-TYPE-STRING is unused." (elpher-with-clean-buffer (if (not data) t - (insert (elpher-buttonify-urls - (elpher-preprocess-text-response) - elpher-selector-string)) + (insert (elpher-buttonify-urls (elpher-preprocess-text-response data))) (elpher-cache-content (elpher-node-address elpher-current-node) (buffer-string))))) ;; Image retrieval -(defun elpher-render-image (data) - "Display DATA as image." +(defun elpher-render-image (data &optional mime-type-string) + "Display DATA as image, MIME-TYPE-STRING is unused." (if (not data) - f + nil (if (display-images-p) (progn (let ((image (create-image @@ -689,10 +683,10 @@ If ADDRESS is not supplied or nil the record is rendered as an ;; Raw server response rendering -(defun elpher-render-raw (data) - "Display raw DATA in buffer." +(defun elpher-render-raw (data &optional mime-type-string) + "Display raw DATA in buffer, MIME-TYPE-STRING is unused." (if (not data) - f + nil (elpher-with-clean-buffer (insert data) (goto-char (point-min))) @@ -700,10 +694,10 @@ If ADDRESS is not supplied or nil the record is rendered as an ;; File save "rendering" -(defun elpher-render-download (data) - "Save DATA to file." +(defun elpher-render-download (data &optional mime-type-string) + "Save DATA to file, MIME-TYPE-STRING is unused." (if (not data) - f + nil (let* ((address (elpher-node-address elpher-current-node)) (selector (elpher-gopher-address-selector address))) (elpher-visit-parent-node) ; Do first in case of non-local exits. @@ -712,16 +706,16 @@ If ADDRESS is not supplied or nil the record is rendered as an nil nil nil (if (> (length filename-proposal) 0) filename-proposal - "gopher.file")))) - (with-temp-file filename - (insert elpher-selector-string) - (message (format "Saved to file %s." - elpher-download-filename))))))) + "download.file")))) + (let ((coding-system-for-write 'binary)) + (with-temp-file filename + (insert data))) + (message (format "Saved to file %s." filename)))))) ;; HTML rendering -(defun elpher-render-html (data) - "Render DATA as HTML using shr." +(defun elpher-render-html (data &optional mime-type-string) + "Render DATA as HTML using shr, MIME-TYPE-STRING is unused." (elpher-with-clean-buffer (if (not data) t @@ -734,9 +728,8 @@ If ADDRESS is not supplied or nil the record is rendered as an (defvar elpher-gemini-response) - -(defun elpher-get-gemini-response (address renderer) - "Retrieve gemini ADDRESS, then execute RENDERER on the result. +(defun elpher-get-gemini-response (address after) + "Retrieve gemini ADDRESS, then execute AFTER. The response is stored in the variable ‘elpher-gemini-response’." (setq elpher-gemini-response "") (if (not (gnutls-available-p)) @@ -754,50 +747,56 @@ The response is stored in the variable ‘elpher-gemini-response’." (lambda (proc string) (setq elpher-gemini-response (concat elpher-gemini-response string)))) - (set-process-sentinel proc - (lambda (proc event) - (unless (string-prefix-p "deleted" event) - (elpher-process-gemini-response #'after)))) + (set-process-sentinel proc after) (process-send-string proc (concat (elpher-address-to-url address) "\r\n"))))) (defun elpher-process-gemini-response (renderer) - "Process the gemini response found in the variable elpher-gemini-response and + "Process the gemini response found in the variable `elpher-gemini-response' and pass the result to RENDERER." (condition-case the-error - (unless (string-prefix-p "deleted" event) - (let* ((response-header (car (split-string elpher-gemini-response "\r\n"))) - (response-body (substring elpher-gemini-response - (+ (string-match "\r\n" elpher-gemini-response) 2))) - (response-code (car (split-string response-header))) - (response-meta (string-trim - (substring response-header - (string-match "[ \t]+" response-header))))) - (pcase (elt response-code 0) - (?1 ; Input required - (elpher-with-clean-buffer - (insert "Gemini server is requesting input.")) - (let* ((query-string (read-string (concat response-meta ": "))) - (url (elpher-address-to-url (elpher-node-address elpher-current-node))) - (query-address (elpher-address-from-url (concat url "?" query-string)))) - (elpher-get-gemini query-address #'renderer))) - (?2 ; Normal response - (message response-header) - (funcall #'renderer elpher-gemini-response)) - (?3 ; Redirect - (message "Following redirect to %s" meta) - (let ((redirect-address (elpher-address-from-gemini-url meta))) - (elpher-get-gemini redirect-address #'renderer))) - (?4 ; Temporary failure - (error "Gemini server reports TEMPORARY FAILURE for this request")) - (?5 ; Permanent failure - (error "Gemini server reports PERMANENT FAILURE for this request")) - (?6 ; Client certificate required - (error "Gemini server requires client certificate (unsupported at this time)")) - (other - (error "Gemini server responded with unknown response code %S" - response-code))))) + (let* ((response-header (car (split-string elpher-gemini-response "\r\n"))) + (response-body (substring elpher-gemini-response + (+ (string-match "\r\n" elpher-gemini-response) 2))) + (response-code (car (split-string response-header))) + (response-meta (string-trim + (substring response-header + (string-match "[ \t]+" response-header))))) + (pcase (elt response-code 0) + (?1 ; Input required + (elpher-with-clean-buffer + (insert "Gemini server is requesting input.")) + (let* ((query-string (read-string (concat response-meta ": "))) + (url (elpher-address-to-url (elpher-node-address elpher-current-node))) + (query-address (elpher-address-from-url (concat url "?" query-string)))) + (elpher-get-gemini-response query-address + (lambda (proc event) + (unless (string-prefix-p "deleted" event) + (funcall #'elpher-process-gemini-response + renderer) + (elpher-restore-pos)))))) + (?2 ; Normal response + (message response-header) + (funcall renderer response-body response-meta)) + (?3 ; Redirect + (message "Following redirect to %s" response-meta) + (let ((redirect-address (elpher-address-from-gemini-url response-meta))) + (elpher-get-gemini-response redirect-address + (lambda (proc event) + (unless (string-prefix-p "deleted" event) + (funcall #'elpher-process-gemini-response + renderer) + (elpher-restore-pos)))))) + (?4 ; Temporary failure + (error "Gemini server reports TEMPORARY FAILURE for this request")) + (?5 ; Permanent failure + (error "Gemini server reports PERMANENT FAILURE for this request")) + (?6 ; Client certificate required + (error "Gemini server requires client certificate (unsupported at this time)")) + (other + (error "Gemini server responded with unknown response code %S" + response-code)))) (error (elpher-network-error (elpher-node-address elpher-current-node) the-error)))) @@ -807,28 +806,27 @@ pass the result to RENDERER." (content (elpher-get-cached-content address))) (condition-case the-error (if (and content (funcall renderer nil)) - (progn + (elpher-with-clean-buffer (insert content) (elpher-restore-pos)) (elpher-with-clean-buffer (insert "LOADING GEMINI... (use 'u' to cancel)")) - (elpher-get-gemini address - (lambda (proc event) - (unless (string-prefix-p "deleted" event) - (funcall renderer elpher-gemini-response) - (elpher-restore-pos))))) + (elpher-get-gemini-response address + (lambda (proc event) + (unless (string-prefix-p "deleted" event) + (funcall #'elpher-process-gemini-response + renderer) + (elpher-restore-pos))))) (error (elpher-network-error address the-error))))) -(defun elpher-render-gemini (data) - "Render gemini response DATA." - (if (not data) +(defun elpher-render-gemini (body &optional mime-type-string) + "Render gemini response BODY with rendering hints in META." + (if (not body) t - (let* ((response-header (car (split-string data "\r\n"))) - (response-body (substring data (+ (string-match "\r\n" data) 2))) - (mime-type-string (string-trim (substring response-header 2))) - (mime-type-string* (if (string-empty-p mime-type-string) + (let* ((mime-type-string* (if (or (not mime-type-string) + (string-empty-p mime-type-string)) "text/gemini; charset=utf-8" mime-type-string)) (mime-type-split (split-string mime-type-string* ";")) @@ -850,11 +848,11 @@ pass the result to RENDERER." (replace-regexp-in-string "\r" "" elpher-gemini-response))) (pcase mime-type ((or "text/gemini" "") - (elpher-render-gemini-text/gemini response-body parameters)) + (elpher-render-gemini-text/gemini body parameters)) ((pred (string-prefix-p "text/")) - (elpher-render-gemini-text/plain response-body parameters)) + (elpher-render-gemini-text/plain body parameters)) ((pred (string-prefix-p "image/")) - (elpher-render-image response-body)) + (elpher-render-image body)) (other (error "Unsupported MIME type %S" mime-type)))))) @@ -1110,7 +1108,7 @@ If ADDRESS is already bookmarked, update the label only." (interactive) (let ((address (elpher-node-address elpher-current-node))) (if (elpher-address-special-p address) - (error "Command not valid for this page") + (error "Command invalid for this page") (let ((url (read-string "Gopher or Gemini URL: " (elpher-address-to-url address)))) (elpher-visit-node (elpher-make-node url (elpher-address-from-url url))))))) @@ -1146,7 +1144,7 @@ If ADDRESS is already bookmarked, update the label only." (if (elpher-address-special-p (elpher-node-address elpher-current-node)) (error "This page was not generated by a server") (elpher-visit-node elpher-current-node - #'elpher-get-node-raw)) + #'elpher-render-raw)) (message "No current site."))) (defun elpher-back () @@ -1163,21 +1161,23 @@ If ADDRESS is already bookmarked, update the label only." (if button (let ((node (button-get button 'elpher-node))) (if (elpher-address-special-p (elpher-node-address node)) - (error "Cannot download this link") + (error "Cannot download %s" + (elpher-node-display-string node)) (elpher-visit-node (button-get button 'elpher-node) - #'elpher-get-node-download))) + #'elpher-render-download))) (error "No link selected")))) (defun elpher-download-current () "Download the current page." (interactive) (if (elpher-address-special-p (elpher-node-address elpher-current-node)) - (error "Cannot download this page") + (error "Cannot download %s" + (elpher-node-display-string elpher-current-node)) (elpher-visit-node (elpher-make-node (elpher-node-display-string elpher-current-node) (elpher-node-address elpher-current-node) elpher-current-node) - #'elpher-get-node-download + #'elpher-render-download t))) (defun elpher-build-link-map () @@ -1217,7 +1217,7 @@ If ADDRESS is already bookmarked, update the label only." (elpher-visit-node (elpher-make-node (elpher-address-to-url address-copy) address-copy)))) - (error "Command invalid for this page")))) + (error "Command invalid for %s" (elpher-node-display-string elpher-current-node))))) (defun elpher-bookmarks-current-p () "Return non-nil if current node is a bookmarks page." @@ -1365,8 +1365,8 @@ If ADDRESS is already bookmarked, update the label only." (define-key map (kbd "X") 'elpher-unbookmark-current) (define-key map (kbd "B") 'elpher-bookmarks) (define-key map (kbd "S") 'elpher-set-coding-system) - (when (fboundp 'evil-define-key) - (evil-define-key 'motion map + (when (fboundp 'evil-mode) + (evil-define-key* 'motion map (kbd "TAB") 'elpher-next-link (kbd "C-") 'elpher-follow-current-link (kbd "C-t") 'elpher-back @@ -1394,7 +1394,7 @@ If ADDRESS is already bookmarked, update the label only." "Keymap for gopher client.") (define-derived-mode elpher-mode special-mode "elpher" - "Major mode for elpher, an elisp gopher client.) + "Major mode for elpher, an elisp gopher client.))))))) This mode is automatically enabled by the interactive functions which initialize the gopher client, namely -- 2.20.1