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xml-rpc.el
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xml-rpc.el
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;;; xml-rpc.el --- An elisp implementation of clientside XML-RPC
;; Copyright (C) 2002-2010 Mark A. Hershberger
;; Copyright (C) 2001 CodeFactory AB.
;; Copyright (C) 2001 Daniel Lundin.
;; Copyright (C) 2006 Shun-ichi Goto
;; Modified for non-ASCII character handling.
;; Author: Mark A. Hershberger <[email protected]>
;; Original Author: Daniel Lundin <[email protected]>
;; Version: 1.6.10
;; Created: May 13 2001
;; Keywords: xml rpc network
;; URL: http://launchpad.net/xml-rpc-el
;; Last Modified: <2014-01-29 linda>
(defconst xml-rpc-version "1.6.10"
"Current version of xml-rpc.el")
;; This file is NOT (yet) part of GNU Emacs.
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This is an XML-RPC client implementation in elisp, capable of both
;; synchronous and asynchronous method calls (using the url package's async
;; retrieval functionality).
;; XML-RPC is remote procedure calls over HTTP using XML to describe the
;; function call and return values.
;; xml-rpc.el represents XML-RPC datatypes as lisp values, automatically
;; converting to and from the XML datastructures as needed, both for method
;; parameters and return values, making using XML-RPC methods fairly
;; transparent to the lisp code.
;;; Installation:
;; If you use ELPA (http://tromey.com/elpa), you can install via the
;; M-x package-list-packages interface. This is preferrable as you
;; will have access to updates automatically.
;; Otherwise, just make sure this file in your load-path (usually
;; ~/.emacs.d is included) and put (require 'xml-rpc) in your
;; ~/.emacs or ~/.emacs.d/init.el file.
;;; Requirements
;; xml-rpc.el uses the url package for http handling and xml.el for
;; XML parsing. url is a part of the W3 browser package. The url
;; package that is part of Emacs 22+ works great.
;;
;; xml.el is a part of GNU Emacs 21, but can also be downloaded from
;; here: <URL:ftp://ftp.codefactory.se/pub/people/daniel/elisp/xml.el>
;;; Bug reports
;; Please use M-x xml-rpc-submit-bug-report to report bugs.
;;; XML-RPC datatypes are represented as follows
;; int: 42
;; float/double: 42.0
;; string: "foo"
;; base64: (list :base64 (base64-encode-string "hello" t)) '(:base64 "aGVsbG8=")
;; array: '(1 2 3 4) '(1 2 3 (4.1 4.2)) [ ] '(:array (("not" "a") ("struct" "!")))
;; struct: '(("name" . "daniel") ("height" . 6.1))
;; dateTime: '(:datetime (1234 124))
;;; Examples
;; Here follows some examples demonstrating the use of xml-rpc.el
;; Normal synchronous operation
;; ----------------------------
;; (xml-rpc-method-call "http://localhost:80/RPC" 'foo-method foo bar zoo)
;; Asynchronous example (cb-foo will be called when the methods returns)
;; ---------------------------------------------------------------------
;; (defun cb-foo (foo)
;; (print (format "%s" foo)))
;; (xml-rpc-method-call-async 'cb-foo "http://localhost:80/RPC"
;; 'foo-method foo bar zoo)
;; Some real world working examples for fun and play
;; -------------------------------------------------
;; Check the temperature (celsius) outside [email protected]'s apartment
;; (xml-rpc-method-call
;; "http://flint.bengburken.net:80/xmlrpc/onewire_temp.php"
;; 'onewire.getTemp)
;; Fetch the latest NetBSD news the past 5 days from O'reillynet
;; (xml-rpc-method-call "http://www.oreillynet.com/meerkat/xml-rpc/server.php"
;; 'meerkat.getItems
;; '(("channel" . 1024)
;; ("search" . "/NetBSD/")
;; ("time_period" . "5DAY")
;; ("ids" . 0)
;; ("descriptions" . 200)
;; ("categories" . 0)
;; ("channels" . 0)
;; ("dates" . 0)
;; ("num_items" . 5)))
;;; History:
;; 1.6.10 - [linda] Support for explicitly passing 'base64 data types.
;; - [linda] Fixed bug that empty values were translated into a boolean (nil)
;; instead of an empty string "" when turning XML into an Emacs list.
;; - [linda] Fixed bugs to be able to use empty lists and lists of lists
;; of strings as XML parameters.
;; (Bugs reported to web site with patches in Dec-2010.)
;; 1.6.9 - Add support for the i8 type (64 bit integers)
;; - Quote lambda with #' instead of ' to silence byte compiler
;; 1.6.8 - Add a report-xml-rpc-bug function
;; Eliminate unused xml-rpc-get-temp-buffer-name
;; Improve compatibility with Xemacs
;; 1.6.7 - Skipped version
;; 1.6.6 - Use the correct dateTime elements. Fix bug in parsing null int.
;; 1.6.5.1 - Fix compile time warnings.
;; 1.6.5 - Made handling of dateTime elements more robust.
;; 1.6.4.1 - Updated to work with both Emacs22 and Emacs23.
;; 1.6.2.2 - Modified to allow non-ASCII string again.
;; It can handle non-ASCII page name and comment
;; on Emacs 21 also.
;; 1.6.2.1 - Modified to allow non-ASCII string.
;; If xml-rpc-allow-unicode-string is non-nil,
;; make 'value' object instead of 'base64' object.
;; This is good for WikiRPC.
;; 1.6.2 - Fix whitespace issues to work better with new xml.el
;; Fix bug in string handling.
;; Add support for gzip-encoding when needed.
;; 1.6.1 - base64 support added.
;; url-insert-entities-in-string done on string types now.
;; 1.6 - Fixed dependencies (remove w3, add cl).
;; Move string-to-boolean and boolean-to-string into xml-rpc
;; namespace.
;; Fix bug in xml-rpc-xml-to-response where non-existent var was.
;; More tweaking of "Connection: close" header.
;; Fix bug in xml-rpc-request-process-buffer so that this works with
;; different mixes of the url.el code.
;; 1.5.1 - Added Andrew J Cosgriff's patch to make the
;; xml-rpc-clean-string function work in XEmacs.
;; 1.5 - Added headers to the outgoing url-retreive-synchronously
;; so that it would close connections immediately on completion.
;; 1.4 - Added conditional debugging code. Added version tag.
;; 1.2 - Better error handling. The documentation didn't match
;; the code. That was changed so that an error was
;; signaled. Also, better handling of various and
;; different combinations of xml.el and url.el.
;; 1.1 - Added support for boolean types. If the type of a
;; returned value is not specified, string is assumed
;; 1.0 - First version
;;; Code:
(require 'xml)
(require 'url-http)
(require 'timezone)
(eval-when-compile
(require 'cl))
(defconst xml-rpc-maintainer-address "[email protected]"
"The address where bug reports should be sent.")
(defcustom xml-rpc-load-hook nil
"*Hook run after loading xml-rpc."
:type 'hook :group 'xml-rpc)
(defcustom xml-rpc-use-coding-system
(if (coding-system-p 'utf-8) 'utf-8 'iso-8859-1)
"The coding system to use."
:type 'symbol :group 'xml-rpc)
(defcustom xml-rpc-allow-unicode-string (coding-system-p 'utf-8)
"If non-nil, non-ASCII data is composed as 'value' instead of 'base64'.
And this option overrides `xml-rpc-base64-encode-unicode' and
`xml-rpc-base64-decode-unicode' if set as non-nil."
:type 'boolean :group 'xml-rpc)
(defcustom xml-rpc-base64-encode-unicode (coding-system-p 'utf-8)
"If non-nil, then strings with non-ascii characters will be turned
into Base64."
:type 'boolean :group 'xml-rpc)
(defcustom xml-rpc-base64-decode-unicode (coding-system-p 'utf-8)
"If non-nil, then base64 strings will be decoded using the
utf-8 coding system."
:type 'boolean :group 'xml-rpc)
(defcustom xml-rpc-debug 0
"Set this to 1 or greater to avoid killing temporary buffers.
Set it higher to get some info in the *Messages* buffer"
:type 'integer :group 'xml-rpc)
(defvar xml-rpc-fault-string nil
"Contains the fault string if a fault is returned")
(defvar xml-rpc-fault-code nil
"Contains the fault code if a fault is returned")
;;
;; Value type handling functions
;;
(defsubst xml-rpc-value-intp (value)
"Return t if VALUE is an integer."
(integerp value))
(defsubst xml-rpc-value-doublep (value)
"Return t if VALUE is a double precision number."
(floatp value))
(defsubst xml-rpc-value-stringp (value)
"Return t if VALUE is a string."
(stringp value))
;; An XML-RPC struct is a list where every car is cons or a list of
;; length 1 or 2 and has a string for car.
(defsubst xml-rpc-value-structp (value)
"Return t if VALUE is an XML-RPC struct."
(and (listp value)
(let ((vals value)
(result t)
curval)
(while (and vals result)
(setq result (and
(setq curval (car-safe vals))
(consp curval)
(stringp (car-safe curval))))
(setq vals (cdr-safe vals)))
result)))
;; A somewhat lazy predicate for arrays
(defsubst xml-rpc-value-arrayp (value)
"Return t if VALUE is an XML-RPC array - specified by keyword :array or
a list that is not datetime, base64 or struct."
(and (listp value)
(or
(eq (car value) :array)
(and
(not (xml-rpc-value-datetimep value))
(not (xml-rpc-value-base64p value))
(not (xml-rpc-value-structp value))))))
(defsubst xml-rpc-value-vectorp (value)
"Return t if VALUE is a vector - used to pass in empty lists"
(vectorp value))
(defun xml-rpc-submit-bug-report ()
"Submit a bug report on xml-rpc."
(interactive)
(require 'reporter)
(let ((xml-rpc-tz-pd-defined-in
(if (fboundp 'find-lisp-object-file-name)
(find-lisp-object-file-name
'timezone-parse-date (symbol-function 'timezone-parse-date))
(symbol-file 'timezone-parse-date)))
(date-parses-as (timezone-parse-date "20091130T00:52:53")))
(reporter-submit-bug-report
xml-rpc-maintainer-address
(concat "xml-rpc.el " xml-rpc-version)
(list 'xml-rpc-tz-pd-defined-in
'date-parses-as
'xml-rpc-load-hook
'xml-rpc-use-coding-system
'xml-rpc-allow-unicode-string
'xml-rpc-base64-encode-unicode
'xml-rpc-base64-decode-unicode))))
(defun xml-rpc-value-booleanp (value)
"Return t if VALUE is a boolean."
(or (eq value nil)
(eq value t)))
(defun xml-rpc-value-datetimep (value)
"Return t if VALUE is a datetime. For Emacs XML-RPC
implementation, you must put time keyword :datetime before the
time, or it will be confused for a list."
(and (listp value)
(eq (car value) :datetime)))
(defun xml-rpc-value-base64p (value)
"Return t if VALUE is a base64 byte array. For Emacs XML-RPC
implementation, you must put keyword :base64 before the
sequence, or it will be confused for a list."
(and (listp value)
(eq (car value) :base64)))
(defun xml-rpc-string-to-boolean (value)
"Return t if VALUE is a boolean"
(or (string-equal value "true") (string-equal value "1")))
(defun xml-rpc-caddar-safe (list)
"Assume that LIST is '((value nil REST)) and return REST. If REST is nil, then return \"\""
(let ((rest (car-safe (cdr-safe (cdr-safe (car-safe list))))))
(if rest
rest
"")))
(defun xml-rpc-xml-list-to-value (xml-list)
"Convert an XML-RPC structure in an xml.el style XML-LIST to an elisp list, \
interpreting and simplifying it while retaining its structure."
(let (valtype valvalue)
(cond
((and (xml-rpc-caddar-safe xml-list)
(listp (xml-rpc-caddar-safe xml-list)))
(setq valtype (car (caddar xml-list))
valvalue (caddr (caddar xml-list)))
(cond
;; Base64
((eq valtype 'base64)
(list :base64 (base64-decode-string valvalue))) ; for some reason, Emacs wraps this in a second encoding
;; Boolean
((eq valtype 'boolean)
(xml-rpc-string-to-boolean valvalue))
;; String
((eq valtype 'string)
valvalue)
;; Integer
((or (eq valtype 'int) (eq valtype 'i4) (eq valtype 'i8))
(string-to-number (or valvalue "0")))
;; Double/float
((eq valtype 'double)
(string-to-number (or valvalue "0.0")))
;; Struct
((eq valtype 'struct)
(mapcar (lambda (member)
(let ((membername (cadr (cdaddr member)))
(membervalue (xml-rpc-xml-list-to-value
(cdddr member))))
(cons membername membervalue)))
(cddr (caddar xml-list))))
;; Fault
((eq valtype 'fault)
(let* ((struct (xml-rpc-xml-list-to-value (list valvalue)))
(fault-string (cdr (assoc "faultString" struct)))
(fault-code (cdr (assoc "faultCode" struct))))
(list 'fault fault-code fault-string)))
;; DateTime
((or (eq valtype 'dateTime.iso8601)
(eq valtype 'dateTime))
(list :datetime (date-to-time valvalue)))
;; Array
((eq valtype 'array)
(mapcar (lambda (arrval)
(xml-rpc-xml-list-to-value (list arrval)))
(cddr valvalue)))))
(t
(xml-rpc-caddar-safe xml-list)))))
(defun xml-rpc-boolean-to-string (value)
"Convert a boolean value to a string"
(if value
"1"
"0"))
(defun xml-rpc-datetime-to-string (value)
"Convert a date time to a valid XML-RPC date"
(format-time-string "%Y%m%dT%H:%M:%S" (cadr value)))
(defun xml-rpc-value-to-xml-list (value)
"Return XML representation of VALUE properly formatted for use with the \
functions in xml.el."
(cond
;; boolean
((xml-rpc-value-booleanp value)
`((value nil (boolean nil ,(xml-rpc-boolean-to-string value)))))
;; Date
((xml-rpc-value-datetimep value)
`((value nil (dateTime.iso8601 nil ,(xml-rpc-datetime-to-string value)))))
;; base64 (explicit)
((xml-rpc-value-base64p value)
`((value nil (base64 nil ,(base64-encode-string (cadr value)))))) ; strip keyword; for some reason, Emacs decodes this twice
;; array as vector (for empty lists)
((xml-rpc-value-vectorp value)
(let ((result nil)
(xmlval nil))
(dotimes (i (length value))
(setq xmlval (xml-rpc-value-to-xml-list (elt value i))
result (if result (append result xmlval) xmlval)))
`((value nil (array nil ,(append '(data nil) result))))))
;; array as list
((xml-rpc-value-arrayp value)
(setq value (if (eq (car value) :array) (cadr value) value)) ; strip keyword if any
(let ((result nil)
(xmlval nil))
(while (setq xmlval (xml-rpc-value-to-xml-list (car value))
result (if result (append result xmlval)
xmlval)
value (cdr value)))
`((value nil (array nil ,(append '(data nil) result))))))
;; struct
((xml-rpc-value-structp value)
(let ((result nil)
(xmlval nil))
(while (setq xmlval `((member nil (name nil ,(caar value))
,(car (xml-rpc-value-to-xml-list
(cdar value)))))
result (append result xmlval)
value (cdr value)))
`((value nil ,(append '(struct nil) result)))))
;; Value is a scalar
((xml-rpc-value-intp value)
`((value nil (int nil ,(int-to-string value)))))
((xml-rpc-value-stringp value)
(let ((charset-list (find-charset-string value)))
(if (or xml-rpc-allow-unicode-string
(and (eq 1 (length charset-list))
(eq 'ascii (car charset-list)))
(not xml-rpc-base64-encode-unicode))
`((value nil (string nil ,value)))
`((value nil (string nil ,(if xml-rpc-base64-encode-unicode
(base64-encode-string
(encode-coding-string
value xml-rpc-use-coding-system))
(base64-encode-string value))))))))
((xml-rpc-value-doublep value)
`((value nil (double nil ,(number-to-string value)))))
(t
`((value nil (string nil ,(base64-encode-string value)))))))
(defun xml-rpc-xml-to-string (xml)
"Return a string representation of the XML tree as valid XML markup."
(let ((tree (xml-node-children xml))
(result (concat "<" (symbol-name (xml-node-name xml)) ">")))
(while tree
(cond
((listp (car tree))
(setq result (concat result (xml-rpc-xml-to-string (car tree)))))
((stringp (car tree))
(setq result (concat result (car tree))))
(t
(error "Invalid XML tree")))
(setq tree (cdr tree)))
(setq result (concat result "</" (symbol-name (xml-node-name xml)) ">"))
result))
;;
;; Response handling
;;
(defsubst xml-rpc-response-errorp (response)
"An 'xml-rpc-method-call' result value is always a list, where the first \
element in RESPONSE is either nil or if an error occured, a cons pair \
according to (errnum . \"Error string\"),"
(eq 'fault (car-safe (caddar response))))
(defsubst xml-rpc-response-error-code (response)
"Return the error code from RESPONSE."
(and (xml-rpc-response-errorp response)
(nth 1 (xml-rpc-xml-list-to-value response))))
(defsubst xml-rpc-response-error-string (response)
"Return the error code from RESPONSE."
(and (xml-rpc-response-errorp response)
(nth 2 (xml-rpc-xml-list-to-value response))))
(defun xml-rpc-xml-to-response (xml)
"Convert an XML list to a method response list. An error is
signaled if there is a fault or if the response does not appear
to be an XML-RPC response (i.e. no methodResponse). Otherwise,
the parsed XML response is returned."
;; Check if we have a methodResponse
(cond
((not (eq (car-safe (car-safe xml)) 'methodResponse))
(error "No methodResponse found"))
;; Did we get a fault response
((xml-rpc-response-errorp xml)
(let ((resp (xml-rpc-xml-list-to-value xml)))
(setq xml-rpc-fault-string (nth 2 resp))
(setq xml-rpc-fault-code (nth 1 resp))
(error "XML-RPC fault `%s'" xml-rpc-fault-string)))
;; Interpret the XML list and produce a more useful data structure
(t
(let ((valpart (cdr (cdaddr (caddar xml)))))
(xml-rpc-xml-list-to-value valpart)))))
;;
;; Method handling
;;
(defun xml-rpc-request (server-url xml &optional async-callback-function)
"Perform http post request to SERVER-URL using XML.
If ASYNC-CALLBACK-FUNCTION is non-nil, the request will be performed
asynchronously and ASYNC-CALLBACK-FUNCTION should be a callback function to
be called when the reuest is finished. ASYNC-CALLBACK-FUNCTION is called with
a single argument being an xml.el style XML list.
It returns an XML list containing the method response from the XML-RPC server,
or nil if called with ASYNC-CALLBACK-FUNCTION."
(declare (special url-current-callback-data
url-current-callback-func
url-http-response-status))
(unwind-protect
(save-excursion
(let ((url-request-method "POST")
(url-package-name "xml-rpc.el")
(url-package-version xml-rpc-version)
(url-request-data (concat "<?xml version=\"1.0\""
" encoding=\"UTF-8\"?>\n"
(with-temp-buffer
(xml-print xml)
(when xml-rpc-allow-unicode-string
(encode-coding-region
(point-min) (point-max) 'utf-8))
(buffer-string))
"\n"))
(url-mime-charset-string "utf-8;q=1, iso-8859-1;q=0.5")
(url-request-coding-system xml-rpc-use-coding-system)
(url-http-attempt-keepalives nil)
(url-request-extra-headers (list
(cons "Connection" "close")
(cons "Content-Type"
"text/xml; charset=utf-8"))))
(when (> xml-rpc-debug 1)
(print url-request-data (create-file-buffer "request-data")))
(cond ((boundp 'url-be-asynchronous) ; Sniff for w3 lib capability
(if async-callback-function
(setq url-be-asynchronous t
url-current-callback-data (list
async-callback-function
(current-buffer))
url-current-callback-func
'xml-rpc-request-callback-handler)
(setq url-be-asynchronous nil))
(url-retrieve server-url t)
(when (not url-be-asynchronous)
(let ((result (xml-rpc-request-process-buffer
(current-buffer))))
(when (> xml-rpc-debug 1)
(print result (create-file-buffer "result-data")))
result)))
(t ; Post emacs20 w3-el
(if async-callback-function
(url-retrieve server-url async-callback-function)
(let ((buffer (url-retrieve-synchronously server-url)))
(with-current-buffer buffer
(when (not (numberp url-http-response-status))
;; this error may occur when keep-alive bug
;; of url-http.el is not cleared.
(error "Why? url-http-response-status is %s"
url-http-response-status))
(when (> url-http-response-status 299)
(error "Error during request: %s"
url-http-response-status)))
(xml-rpc-request-process-buffer buffer)))))))))
(defun xml-rpc-clean-string (s)
(if (string-match "\\`[ \t\n\r]*\\'" s)
;;"^[ \t\n]*$" s)
nil
s))
(defun xml-rpc-clean (l)
(cond
((listp l)
(let (elem
(result nil))
(while l
;; iterate
(setq elem (car l)
l (cdr l))
;; test the head
(cond
;; a string, so clean it.
((stringp elem)
(let ((tmp (xml-rpc-clean-string elem)))
(when (and tmp xml-rpc-allow-unicode-string)
(setq tmp (decode-coding-string tmp xml-rpc-use-coding-system)))
(if tmp
(setq result (append result (list tmp)))
result)))
;; a list, so recurse.
((listp elem)
(setq result (append result (list (xml-rpc-clean elem)))))
;; everthing else, as is.
(t
(setq result (append result (list elem))))))
result))
((stringp l) ; will returning nil be acceptable ?
nil)
(t l)))
(defun xml-rpc-request-process-buffer (xml-buffer)
"Process buffer XML-BUFFER."
(unwind-protect
(with-current-buffer xml-buffer
(when (fboundp 'url-uncompress)
(let ((url-working-buffer xml-buffer))
(url-uncompress)))
(goto-char (point-min))
(search-forward-regexp "<\\?xml" nil t)
(move-to-column 0)
;; Gather the results
(let* ((status (if (boundp 'url-http-response-status)
;; Old URL lib doesn't save the result.
url-http-response-status 200))
(result (cond
;; A probable XML response
((looking-at "<\\?xml ")
(xml-rpc-clean (xml-parse-region (point-min)
(point-max))))
;; No HTTP status returned
((not status)
(let ((errstart
(search-forward "\n---- Error was: ----\n")))
(and errstart
(buffer-substring errstart (point-max)))))
;; Maybe they just gave us an the XML w/o PI?
((search-forward "<methodResponse>" nil t)
(xml-rpc-clean (xml-parse-region (match-beginning 0)
(point-max))))
;; Valid HTTP status
(t
(int-to-string status)))))
(when (< xml-rpc-debug 3)
(kill-buffer (current-buffer)))
result))))
(defun xml-rpc-request-callback-handler (callback-fun xml-buffer)
"Marshall a callback function request to CALLBACK-FUN with the results \
handled from XML-BUFFER."
(let ((xml-response (xml-rpc-request-process-buffer xml-buffer)))
(when (< xml-rpc-debug 1)
(kill-buffer xml-buffer))
(funcall callback-fun (xml-rpc-xml-to-response xml-response))))
(defun xml-rpc-method-call-async (async-callback-func server-url method
&rest params)
"Call an XML-RPC method asynchronously at SERVER-URL named METHOD with \
PARAMS as parameters. When the method returns, ASYNC-CALLBACK-FUNC will be \
called with the result as parameter."
(let* ((m-name (if (stringp method)
method
(symbol-name method)))
(m-params (mapcar #'(lambda (p)
`(param nil ,(car (xml-rpc-value-to-xml-list
p))))
(if async-callback-func
params
(car-safe params))))
(m-func-call `((methodCall nil (methodName nil ,m-name)
,(append '(params nil) m-params)))))
(when (> xml-rpc-debug 1)
(print m-func-call (create-file-buffer "func-call")))
(xml-rpc-request server-url m-func-call async-callback-func)))
(defun xml-rpc-method-call (server-url method &rest params)
"Call an XML-RPC method at SERVER-URL named METHOD with PARAMS as \
parameters."
(let ((response
(xml-rpc-method-call-async nil server-url method params)))
(cond ((stringp response)
(list (cons nil (concat "URL/HTTP Error: " response))))
(t
(xml-rpc-xml-to-response response)))))
(unless (fboundp 'xml-escape-string)
(defun xml-debug-print (xml &optional indent-string)
"Outputs the XML in the current buffer.
XML can be a tree or a list of nodes.
The first line is indented with the optional INDENT-STRING."
(setq indent-string (or indent-string ""))
(dolist (node xml)
(xml-debug-print-internal node indent-string)))
(defalias 'xml-print 'xml-debug-print)
(when (not (boundp 'xml-entity-alist))
(defvar xml-entity-alist
'(("lt" . "<")
("gt" . ">")
("apos" . "'")
("quot" . "\"")
("amp" . "&"))))
(defun xml-escape-string (string)
"Return the string with entity substitutions made from
xml-entity-alist."
(mapconcat (lambda (byte)
(let ((char (char-to-string byte)))
(if (rassoc char xml-entity-alist)
(concat "&" (car (rassoc char xml-entity-alist)) ";")
char)))
;; This differs from the non-unicode branch. Just
;; grabbing the string works here.
string ""))
(defun xml-debug-print-internal (xml indent-string)
"Outputs the XML tree in the current buffer.
The first line is indented with INDENT-STRING."
(let ((tree xml)
attlist)
(insert indent-string ?< (symbol-name (xml-node-name tree)))
;; output the attribute list
(setq attlist (xml-node-attributes tree))
(while attlist
(insert ?\ (symbol-name (caar attlist)) "=\""
(xml-escape-string (cdar attlist)) ?\")
(setq attlist (cdr attlist)))
(setq tree (xml-node-children tree))
(if (null tree)
(insert ?/ ?>)
(insert ?>)
;; output the children
(dolist (node tree)
(cond
((listp node)
(insert ?\n)
(xml-debug-print-internal node (concat indent-string " ")))
((stringp node)
(insert (xml-escape-string node)))
(t
(error "Invalid XML tree"))))
(when (not (and (null (cdr tree))
(stringp (car tree))))
(insert ?\n indent-string))
(insert ?< ?/ (symbol-name (xml-node-name xml)) ?>)))))
(let ((tdate (timezone-parse-date "20090101T010101Z")))
(when (not (string-equal (aref tdate 0) "2009"))
(defun timezone-parse-date (date)
"Parse DATE and return a vector [YEAR MONTH DAY TIME TIMEZONE].
Two-digit dates are `windowed'. Those <69 have 2000 added; otherwise 1900
is added. Three-digit dates have 1900 added.
TIMEZONE is nil for DATEs without a zone field.
Understands the following styles:
(1) 14 Apr 89 03:20[:12] [GMT]
(2) Fri, 17 Mar 89 4:01[:33] [GMT]
(3) Mon Jan 16 16:12[:37] [GMT] 1989
(4) 6 May 1992 1641-JST (Wednesday)
(5) 22-AUG-1993 10:59:12.82
(6) Thu, 11 Apr 16:17:12 91 [MET]
(7) Mon, 6 Jul 16:47:20 T 1992 [MET]
(8) 1996-06-24 21:13:12 [GMT]
(9) 1996-06-24 21:13-ZONE
(10) 19960624T211312"
;; Get rid of any text properties.
(and (stringp date)
(or (text-properties-at 0 date)
(next-property-change 0 date))
(setq date (copy-sequence date))
(set-text-properties 0 (length date) nil date))
(let ((date (or date ""))
(year nil)
(month nil)
(day nil)
(time nil)
(zone nil)) ;This may be nil.
(cond ((string-match
"\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (1) and (2) with timezone and buggy timezone
;; This is most common in mail and news,
;; so it is worth trying first.
(setq year 3 month 2 day 1 time 4 zone 5))
((string-match
"\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]*\\'" date)
;; Styles: (1) and (2) without timezone
(setq year 3 month 2 day 1 time 4 zone nil))
((string-match
"\\([^ \t,]+\\),[ \t]+\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\(T[ \t]+\\|\\)\\([0-9]+\\)[ \t]*\\'" date)
;; Styles: (6) and (7) without timezone
(setq year 6 month 3 day 2 time 4 zone nil))
((string-match
"\\([^ \t,]+\\),[ \t]+\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\(T[ \t]+\\|\\)\\([0-9]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (6) and (7) with timezone and buggy timezone
(setq year 6 month 3 day 2 time 4 zone 7))
((string-match
"\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\([0-9]+\\)" date)
;; Styles: (3) without timezone
(setq year 4 month 1 day 2 time 3 zone nil))
((string-match
"\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9:]+\\)[ \t]+\\([-+a-zA-Z0-9]+\\)[ \t]+\\([0-9]+\\)" date)
;; Styles: (3) with timezone
(setq year 5 month 1 day 2 time 3 zone 4))
((string-match
"\\([0-9]+\\)[ \t]+\\([^ \t,]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+\\)[ \t]*\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (4) with timezone
(setq year 3 month 2 day 1 time 4 zone 5))
((string-match
"\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)?[ \t]+\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (5) with timezone.
(setq year 3 month 2 day 1 time 4 zone 6))
((string-match
"\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)?" date)
;; Styles: (5) without timezone.
(setq year 3 month 2 day 1 time 4 zone nil))
((string-match
"\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)[ \t]+\\([-+a-zA-Z0-9]+\\)" date)
;; Styles: (8) with timezone.
(setq year 1 month 2 day 3 time 4 zone 5))
((string-match
"\\([0-9]\\{4\\}\\)-?\\([0-9]\\{0,2\\}\\)-?\\([0-9]\\{0,2\\}\\)[T \t]+\\([0-9]\\{0,2\\}:?[0-9]\\{0,2\\}:?[0-9]\\{0,2\\}\\)[ \t]*\\([-+a-zA-Z]+[0-9:]*\\)" date)
;; Styles: (8) with timezone with a colon in it.
(setq year 1 month 2 day 3 time 4 zone 5))
((string-match
"\\([0-9]\\{4\\}\\)-?\\([0-9]\\{0,2\\}\\)-?\\([0-9]\\{0,2\\}\\)[T \t]+\\([0-9]+:?[0-9]+:?[0-9]+\\)" date)
;; Styles: (8) without timezone.
(setq year 1 month 2 day 3 time 4 zone nil)))
(when year
(setq year (match-string year date))
;; Guess ambiguous years. Assume years < 69 don't predate the
;; Unix Epoch, so are 2000+. Three-digit years are assumed to
;; be relative to 1900.
(when (< (length year) 4)
(let ((y (string-to-number year)))
(when (< y 69)
(setq y (+ y 100)))
(setq year (int-to-string (+ 1900 y)))))
(setq month
(if (or (= (aref date (+ (match-beginning month) 2)) ?-)
(let ((n (string-to-number
(char-to-string
(aref date (+ (match-beginning month) 2))))))
(= (aref (number-to-string n) 0)
(aref date (+ (match-beginning month) 2)))))
;; Handle numeric months, spanning exactly two digits.
(substring date
(match-beginning month)
(+ (match-beginning month) 2))
(let* ((string (substring date
(match-beginning month)
(+ (match-beginning month) 3)))
(monthnum
(cdr (assoc (upcase string) timezone-months-assoc))))
(when monthnum
(int-to-string monthnum)))))
(setq day (match-string day date))
(setq time (match-string time date)))
(when zone (setq zone (match-string zone date)))
;; Return a vector.
(if (and year month)
(vector year month day time zone)
(vector "0" "0" "0" "0" nil))))))
(provide 'xml-rpc)
;; Local Variables:
;; time-stamp-pattern: "20/^;; Last Modified: <%%>$"
;; End:
;;; xml-rpc.el ends here