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tinmop/src/kami/client.lisp

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Common Lisp
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(in-package :kami)
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(a:define-constant +kami-scheme+ "np" :test #'string=)
(a:define-constant +download-buffer+ (expt 2 24) :test #'=)
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(a:define-constant +octect-type+ '(unsigned-byte 8) :test #'equalp)
(defparameter *stream* nil)
(defparameter *root-fid* nil)
(defstruct 9p-parameters
(message-sent)
(fid)
(tag))
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(defmacro with-open-ssl-stream ((ssl-stream socket host port
client-certificate
certificate-key)
&body body)
(alexandria:with-gensyms (tls-context socket-stream ssl-hostname)
`(let ((,tls-context (cl+ssl:make-context :verify-mode cl+ssl:+ssl-verify-none+)))
(cl+ssl:with-global-context (,tls-context :auto-free-p t)
(let* ((,socket (gemini-client:open-tls-socket ,host ,port))
(,socket-stream (usocket:socket-stream ,socket))
(,ssl-hostname ,host)
(,ssl-stream
(cl+ssl:make-ssl-client-stream ,socket-stream
:certificate ,client-certificate
:key ,certificate-key
:external-format nil ; unsigned byte 8
:unwrap-stream-p t
:verify nil
:hostname ,ssl-hostname)))
,@body)))))
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(defmacro with-cloned-root-fid ((stream cloned-fid &key (clunk-cloned-fid t)) &body body)
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`(let ((,cloned-fid (9p:clone-fid ,stream *root-fid*)))
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(prog1
(progn ,@body)
(when ,clunk-cloned-fid
(9p:9p-clunk ,stream ,cloned-fid)))))
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(defmacro with-9p-params ((params) &body body)
`(let* ((9p:*tag* (9p-parameters-tag ,params))
(9p:*fid* (9p-parameters-fid ,params))
(9p:*messages-sent* (9p-parameters-message-sent ,params)))
(unwind-protect
(progn ,@body)
(setf (9p-parameters-tag ,params) 9p:*tag*)
(setf (9p-parameters-fid ,params) 9p:*fid*)
(setf (9p-parameters-message-sent ,params) 9p:*messages-sent*))))
(defun expand-node (stream root-fid params)
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(lambda (node)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid)
(path (tree-path (data node))))
(with-cloned-root-fid (*stream* cloned-root-fid)
(let* ((entries (9p:collect-directory-children *stream* cloned-root-fid path))
(files (remove-if-not (lambda (a) (or (eq (9p:stat-entry-type a)
:file)
(eq (9p:stat-entry-type a)
:executable)))
entries))
(directories (remove-if-not (lambda (a) (eq (9p:stat-entry-type a)
:directory))
entries)))
(remove-all-children node)
(loop for directory in directories do
(let ((absolute-path (text-utils:strcat path (9p:stat-name directory))))
(add-child node
(make-instance 'm-tree
:data (make-node-data absolute-path t)))))
(loop for file in files do
(let ((absolute-path (text-utils:strcat path (9p:stat-name file))))
(add-child node
(make-instance 'm-tree
:data (make-node-data absolute-path nil))))))
node)))))
(defun rename-node (stream root-fid params)
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(lambda (node new-path)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid)
(path (tree-path (data node))))
(assert path)
(with-cloned-root-fid (*stream* cloned-root-fid)
(9p:move-file *stream* cloned-root-fid path new-path))))))
(defun delete-node (stream root-fid params)
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(lambda (node)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid)
(path (tree-path (data node))))
(assert path)
(with-cloned-root-fid (*stream* cloned-root-fid)
(9p:remove-path *stream* cloned-root-fid path))))))
(defun create-node (stream root-fid params)
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(lambda (path dirp)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid))
(assert path)
(with-cloned-root-fid (*stream* cloned-root-fid :clunk-cloned-fid nil)
(let ((created-fid nil))
(if dirp
(setf created-fid
(9p:create-path *stream*
cloned-root-fid
(if (fs:path-referencing-dir-p path)
path
(text-utils:strcat path "/"))))
(setf created-fid
(9p:create-path *stream* cloned-root-fid path)))
(9p:9p-clunk *stream* created-fid)))))))
(defun download-node (stream root-fid params)
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(lambda (node
&optional
(destination-file
(make-temporary-file-from-node node)))
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid)
(path (tree-path (data node))))
(with-open-file (output-stream destination-file
:direction :output
:if-exists :supersede
:if-does-not-exist :create
:element-type +octect-type+)
(with-cloned-root-fid (*stream* cloned-root-fid)
(9p:read-entire-file-apply-function stream
cloned-root-fid
path
(lambda (data offset count)
(declare (ignore offset count))
(write-sequence data output-stream)))))
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(with-cloned-root-fid (*stream* cloned-root-fid)
(let* ((info-source-node (9p:path-info *stream* cloned-root-fid path))
(permissions (9p:permissions-original-value (9p:stat-mode info-source-node)))
(destination-file-mode (logand permissions #x7ff)))
(fs:change-path-permissions destination-file destination-file-mode)))
destination-file))))
(defun upload-node (stream root-fid params)
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(lambda (source-path destination-path)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid))
(let ((source-permissions (fs:get-stat-mode source-path)))
(with-open-file (input-stream source-path
:direction :input
:element-type +octect-type+)
(with-cloned-root-fid (*stream* cloned-root-fid)
(9p:remove-path *stream* cloned-root-fid destination-path))
(with-cloned-root-fid (*stream* cloned-root-fid :clunk-cloned-fid nil)
(let* ((buffer (misc:make-array-frame +download-buffer+ 0 +octect-type+ t))
(fid (9p:create-path *stream* cloned-root-fid destination-path)))
(loop named write-loop
for read-so-far = (read-sequence buffer input-stream)
then (read-sequence buffer input-stream)
for offset = 0 then (+ offset read-so-far)
do
(9p:9p-write *stream* fid offset (subseq buffer 0 read-so-far))
(when (< read-so-far +download-buffer+)
(return-from write-loop t)))
(9p:9p-clunk *stream* fid)))
(with-cloned-root-fid (*stream* cloned-root-fid)
(9p:change-mode *stream*
cloned-root-fid
destination-path source-permissions)
(9p:read-all-pending-messages stream))))))))
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(defun query-path (stream root-fid params)
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(lambda (path what)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid))
(with-cloned-root-fid (*stream* cloned-root-fid)
(a:when-let ((stat-entry (9p:path-info *stream* cloned-root-fid path)))
(ecase what
(:type
(9p:stat-entry-type stat-entry))
(:size
(9p:stat-entry-type stat-entry))
(:size-string
(fs:octects->units-string (9p:stat-size stat-entry)))
(:permissions-string
(let ((mode (9p:stat-mode stat-entry)))
(format nil
(_ "User: ~a Group: ~a Others ~a")
(9p:permissions-user-string mode)
(9p:permissions-group-string mode)
(9p:permissions-others-string mode)))))))))))
(defun collect-tree (stream root-fid params)
(lambda (path)
(with-9p-params (params)
(let* ((*stream* stream)
(*root-fid* root-fid)
(all-files nil)
(all-dirs nil))
(with-cloned-root-fid (*stream* cloned-root-fid :clunk-cloned-fid t)
(multiple-value-bind (files directories)
(9p:collect-tree *stream* cloned-root-fid path)
(setf all-files files)
(setf all-dirs directories)))
(values all-files all-dirs)))))
(defun generate-filesystem-window-handlers (path host port
query fragment
client-certificate client-key)
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(with-open-ssl-stream (stream socket host port client-certificate client-key)
(let* ((9p:*tag* 10)
(9p:*fid* 1)
(9p:*messages-sent* '())
(*stream* stream)
(*root-fid* (9p:mount *stream* "/"))
(parameters (make-9p-parameters :message-sent 9p:*messages-sent*
:fid 9p:*fid*
:tag 9p:*tag*)))
(list :query query
:fragment fragment
:socket socket
:path path
:filesystem-expand-function (expand-node *stream* *root-fid* parameters)
:filesystem-rename-function (rename-node *stream* *root-fid* parameters)
:filesystem-delete-function (delete-node *stream* *root-fid* parameters)
:filesystem-create-function (create-node *stream* *root-fid* parameters)
:filesystem-download-function (download-node *stream* *root-fid* parameters)
:filesystem-upload-function (upload-node *stream* *root-fid* parameters)
:filesystem-query-path-function (query-path *stream* *root-fid* parameters)
:filesystem-collect-tree (collect-tree *stream* *root-fid* parameters)
:filesystem-close-connection-function (lambda ()
(9p:close-client socket))))))
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(defun iri->filesystem-window-handlers (kami-iri)
(a:when-let ((parsed-iri (iri:iri-parse kami-iri :null-on-error t)))
(multiple-value-bind (cached-certificate cached-key)
(gemini-client:fetch-cached-certificate kami-iri)
(multiple-value-bind (actual-iri host path query port fragment scheme)
(gemini-client:displace-iri parsed-iri)
(declare (ignore actual-iri scheme))
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(kami:generate-filesystem-window-handlers path
host
port
query
fragment
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cached-certificate
cached-key)))))