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strict key encoding for json.el

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Ref: http://lists.gnu.org/archive/html/emacs-devel/2012-08/msg00642.html

* lisp/json.el (json-key-format): Add error properties.
(json-encode-key): New function.
(json-encode-hash-table, json-encode-alist, json-encode-plist):
Use json-encode-key.
This commit is contained in:
Edward O'Connor 2012-08-21 21:29:22 -04:00 committed by Glenn Morris
parent da485f5e6b
commit 94e0e5592a
2 changed files with 23 additions and 3 deletions
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7
lisp/ChangeLog
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@ -1,3 +1,10 @@
2012-08-22 Edward O'Connor <hober0@gmail.com>
* json.el (json-key-format): Add error properties.
(json-encode-key): New function.
(json-encode-hash-table, json-encode-alist, json-encode-plist):
Use json-encode-key.
2012-08-22 Glenn Morris <rgm@gnu.org>
* calendar/cal-tex.el (cal-tex-longday): New function, replacing...

19
lisp/json.el
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@ -174,6 +174,10 @@ this around your call to `json-read' instead of `setq'ing it.")
(put 'json-string-format 'error-conditions
'(json-string-format json-error error))
(put 'json-key-format 'error-message "Bad JSON object key")
(put 'json-key-format 'error-conditions
'(json-key-format json-error error))
(put 'json-object-format 'error-message "Bad JSON object")
(put 'json-object-format 'error-conditions
'(json-object-format json-error error))
@ -321,6 +325,15 @@ representation will be parsed correctly."
"Return a JSON representation of STRING."
(format "\"%s\"" (mapconcat 'json-encode-char string "")))
(defun json-encode-key (object)
"Return a JSON representation of OBJECT.
If the resulting JSON object isn't a valid JSON object key,
this signals `json-key-format'."
(let ((encoded (json-encode object)))
(unless (stringp (json-read-from-string encoded))
(signal 'json-key-format (list object)))
encoded))
;;; JSON Objects
(defun json-new-object ()
@ -395,7 +408,7 @@ Please see the documentation of `json-object-type' and `json-key-type'."
(maphash
(lambda (k v)
(push (format "%s:%s"
(json-encode k)
(json-encode-key k)
(json-encode v))
r))
hash-table)
@ -409,7 +422,7 @@ Please see the documentation of `json-object-type' and `json-key-type'."
(format "{%s}"
(json-join (mapcar (lambda (cons)
(format "%s:%s"
(json-encode (car cons))
(json-encode-key (car cons))
(json-encode (cdr cons))))
alist)
", ")))
@ -418,7 +431,7 @@ Please see the documentation of `json-object-type' and `json-key-type'."
"Return a JSON representation of PLIST."
(let (result)
(while plist
(push (concat (json-encode (car plist))
(push (concat (json-encode-key (car plist))
":"
(json-encode (cadr plist)))
result)