lisp/net/soap-client.el

   1 ;;;; soap-client.el -- Access SOAP web services from Emacs
   2
   3 ;; Copyright (C) 2009-2012  Free Software Foundation, Inc.
   4
   5 ;; Author: Alexandru Harsanyi <AlexHarsanyi@gmail.com>
   6 ;; Created: December, 2009
   7 ;; Keywords: soap, web-services, comm, hypermedia
   8 ;; Package: soap-client
   9 ;; Homepage: http://code.google.com/p/emacs-soap-client
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;; Commentary:
  27 ;;
  28 ;; To use the SOAP client, you first need to load the WSDL document for the
  29 ;; service you want to access, using `soap-load-wsdl-from-url'.  A WSDL
  30 ;; document describes the available operations of the SOAP service, how their
  31 ;; parameters and responses are encoded.  To invoke operations, you use the
  32 ;; `soap-invoke' method passing it the WSDL, the service name, the operation
  33 ;; you wish to invoke and any required parameters.
  34 ;;
  35 ;; Ideally, the service you want to access will have some documentation about
  36 ;; the operations it supports.  If it does not, you can try using
  37 ;; `soap-inspect' to browse the WSDL document and see the available operations
  38 ;; and their parameters.
  39 ;;
  40
  41 ;;; Code:
  42
  43 (eval-when-compile (require 'cl))
  44
  45 (require 'xml)
  46 (require 'warnings)
  47 (require 'url)
  48 (require 'url-http)
  49 (require 'url-util)
  50 (require 'mm-decode)
  51
  52 (defsubst soap-warning (message &rest args)
  53   "Display a warning MESSAGE with ARGS, using the 'soap-client warning type."
  54   (display-warning 'soap-client (apply 'format message args) :warning))
  55
  56 (defgroup soap-client nil
  57   "Access SOAP web services from Emacs."
  58   :group 'tools)
  59
  60 ;;;; Support for parsing XML documents with namespaces
  61
  62 ;; XML documents with namespaces are difficult to parse because the names of
  63 ;; the nodes depend on what "xmlns" aliases have been defined in the document.
  64 ;; To work with such documents, we introduce a translation layer between a
  65 ;; "well known" namespace tag and the local namespace tag in the document
  66 ;; being parsed.
  67
  68 (defconst soap-well-known-xmlns
  69   '(("apachesoap" . "http://xml.apache.org/xml-soap")
  70     ("soapenc" . "http://schemas.xmlsoap.org/soap/encoding/")
  71     ("wsdl" . "http://schemas.xmlsoap.org/wsdl/")
  72     ("wsdlsoap" . "http://schemas.xmlsoap.org/wsdl/soap/")
  73     ("xsd" . "http://www.w3.org/2001/XMLSchema")
  74     ("xsi" . "http://www.w3.org/2001/XMLSchema-instance")
  75     ("soap" . "http://schemas.xmlsoap.org/soap/envelope/")
  76     ("soap12" . "http://schemas.xmlsoap.org/wsdl/soap12/")
  77     ("http" . "http://schemas.xmlsoap.org/wsdl/http/")
  78     ("mime" . "http://schemas.xmlsoap.org/wsdl/mime/"))
  79   "A list of well known xml namespaces and their aliases.")
  80
  81 (defvar soap-local-xmlns nil
  82   "A list of local namespace aliases.
  83 This is a dynamically bound variable, controlled by
  84 `soap-with-local-xmlns'.")
  85
  86 (defvar soap-default-xmlns nil
  87   "The default XML namespaces.
  88 Names in this namespace will be unqualified.  This is a
  89 dynamically bound variable, controlled by
  90 `soap-with-local-xmlns'")
  91
  92 (defvar soap-target-xmlns nil
  93   "The target XML namespace.
  94 New XSD elements will be defined in this namespace, unless they
  95 are fully qualified for a different namespace.  This is a
  96 dynamically bound variable, controlled by
  97 `soap-with-local-xmlns'")
  98
  99 (defun soap-wk2l (well-known-name)
 100   "Return local variant of WELL-KNOWN-NAME.
 101 This is done by looking up the namespace in the
 102 `soap-well-known-xmlns' table and resolving the namespace to
 103 the local name based on the current local translation table
 104 `soap-local-xmlns'.  See also `soap-with-local-xmlns'."
 105   (let ((wk-name-1 (if (symbolp well-known-name)
 106                        (symbol-name well-known-name)
 107                        well-known-name)))
 108     (cond
 109       ((string-match "^\\(.*\\):\\(.*\\)$" wk-name-1)
 110        (let ((ns (match-string 1 wk-name-1))
 111              (name (match-string 2 wk-name-1)))
 112          (let ((namespace (cdr (assoc ns soap-well-known-xmlns))))
 113            (cond ((equal namespace soap-default-xmlns)
 114                   ;; Name is unqualified in the default namespace
 115                   (if (symbolp well-known-name)
 116                       (intern name)
 117                       name))
 118                  (t
 119                   (let* ((local-ns (car (rassoc namespace soap-local-xmlns)))
 120                          (local-name (concat local-ns ":" name)))
 121                     (if (symbolp well-known-name)
 122                         (intern local-name)
 123                         local-name)))))))
 124           (t well-known-name))))
 125
 126 (defun soap-l2wk (local-name)
 127   "Convert LOCAL-NAME into a well known name.
 128 The namespace of LOCAL-NAME is looked up in the
 129 `soap-well-known-xmlns' table and a well known namespace tag is
 130 used in the name.
 131
 132 nil is returned if there is no well-known namespace for the
 133 namespace of LOCAL-NAME."
 134   (let ((l-name-1 (if (symbolp local-name)
 135                        (symbol-name local-name)
 136                        local-name))
 137         namespace name)
 138     (cond
 139       ((string-match "^\\(.*\\):\\(.*\\)$" l-name-1)
 140        (setq name (match-string 2 l-name-1))
 141        (let ((ns (match-string 1 l-name-1)))
 142          (setq namespace (cdr (assoc ns soap-local-xmlns)))
 143          (unless namespace
 144            (error "Soap-l2wk(%s): no namespace for alias %s" local-name ns))))
 145       (t
 146        (setq name l-name-1)
 147        (setq namespace soap-default-xmlns)))
 148
 149     (if namespace
 150         (let ((well-known-ns (car (rassoc namespace soap-well-known-xmlns))))
 151           (if well-known-ns
 152               (let ((well-known-name (concat well-known-ns ":" name)))
 153                 (if (symbol-name local-name)
 154                     (intern well-known-name)
 155                     well-known-name))
 156               (progn
 157                 ;; (soap-warning "soap-l2wk(%s): namespace %s has no well-known tag"
 158                 ;;               local-name namespace)
 159                 nil)))
 160         ;; if no namespace is defined, just return the unqualified name
 161         name)))
 162
 163
 164 (defun soap-l2fq (local-name &optional use-tns)
 165   "Convert LOCAL-NAME into a fully qualified name.
 166 A fully qualified name is a cons of the namespace name and the
 167 name of the element itself.  For example \"xsd:string\" is
 168 converted to \(\"http://www.w3.org/2001/XMLSchema\" . \"string\"\).
 169
 170 The USE-TNS argument specifies what to do when LOCAL-NAME has no
 171 namespace tag.  If USE-TNS is non-nil, the `soap-target-xmlns'
 172 will be used as the element's namespace, otherwise
 173 `soap-default-xmlns' will be used.
 174
 175 This is needed because different parts of a WSDL document can use
 176 different namespace aliases for the same element."
 177   (let ((local-name-1 (if (symbolp local-name)
 178                           (symbol-name local-name)
 179                           local-name)))
 180     (cond ((string-match "^\\(.*\\):\\(.*\\)$" local-name-1)
 181            (let ((ns (match-string 1 local-name-1))
 182                  (name (match-string 2 local-name-1)))
 183              (let ((namespace (cdr (assoc ns soap-local-xmlns))))
 184                (if namespace
 185                    (cons namespace name)
 186                    (error "Soap-l2fq(%s): unknown alias %s" local-name ns)))))
 187           (t
 188            (cons (if use-tns
 189                      soap-target-xmlns
 190                      soap-default-xmlns)
 191                  local-name)))))
 192
 193 (defun soap-extract-xmlns (node &optional xmlns-table)
 194   "Return a namespace alias table for NODE by extending XMLNS-TABLE."
 195   (let (xmlns default-ns target-ns)
 196     (dolist (a (xml-node-attributes node))
 197       (let ((name (symbol-name (car a)))
 198             (value (cdr a)))
 199         (cond ((string= name "targetNamespace")
 200                (setq target-ns value))
 201               ((string= name "xmlns")
 202                (setq default-ns value))
 203               ((string-match "^xmlns:\\(.*\\)$" name)
 204                (push (cons (match-string 1 name) value) xmlns)))))
 205
 206     (let ((tns (assoc "tns" xmlns)))
 207       (cond ((and tns target-ns)
 208              ;; If a tns alias is defined for this node, it must match
 209              ;; the target namespace.
 210              (unless (equal target-ns (cdr tns))
 211                (soap-warning
 212                 "soap-extract-xmlns(%s): tns alias and targetNamespace mismatch"
 213                 (xml-node-name node))))
 214             ((and tns (not target-ns))
 215              (setq target-ns (cdr tns)))
 216             ((and (not tns) target-ns)
 217              ;; a tns alias was not defined in this node.  See if the node has
 218              ;; a "targetNamespace" attribute and add an alias to this.  Note
 219              ;; that we might override an existing tns alias in XMLNS-TABLE,
 220              ;; but that is intended.
 221              (push (cons "tns" target-ns) xmlns))))
 222
 223     (list default-ns target-ns (append xmlns xmlns-table))))
 224
 225 (defmacro soap-with-local-xmlns (node &rest body)
 226   "Install a local alias table from NODE and execute BODY."
 227   (declare (debug (form &rest form)) (indent 1))
 228   (let ((xmlns (make-symbol "xmlns")))
 229     `(let ((,xmlns (soap-extract-xmlns ,node soap-local-xmlns)))
 230        (let ((soap-default-xmlns (or (nth 0 ,xmlns) soap-default-xmlns))
 231              (soap-target-xmlns (or (nth 1 ,xmlns) soap-target-xmlns))
 232              (soap-local-xmlns (nth 2 ,xmlns)))
 233          ,@body))))
 234
 235 (defun soap-get-target-namespace (node)
 236   "Return the target namespace of NODE.
 237 This is the namespace in which new elements will be defined."
 238   (or (xml-get-attribute-or-nil node 'targetNamespace)
 239       (cdr (assoc "tns"  soap-local-xmlns))
 240       soap-target-xmlns))
 241
 242 (defun soap-xml-get-children1 (node child-name)
 243   "Return the children of NODE named CHILD-NAME.
 244 This is the same as `xml-get-children', but CHILD-NAME can have
 245 namespace tag."
 246   (let (result)
 247     (dolist (c (xml-node-children node))
 248       (when (and (consp c)
 249                  (soap-with-local-xmlns c
 250                    ;; We use `ignore-errors' here because we want to silently
 251                    ;; skip nodes for which we cannot convert them to a
 252                    ;; well-known name.
 253                    (eq (ignore-errors (soap-l2wk (xml-node-name c)))
 254                        child-name)))
 255         (push c result)))
 256     (nreverse result)))
 257
 258 (defun soap-xml-get-attribute-or-nil1 (node attribute)
 259   "Return the NODE's ATTRIBUTE, or nil if it does not exist.
 260 This is the same as `xml-get-attribute-or-nil', but ATTRIBUTE can
 261 be tagged with a namespace tag."
 262   (catch 'found
 263     (soap-with-local-xmlns node
 264       (dolist (a (xml-node-attributes node))
 265         ;; We use `ignore-errors' here because we want to silently skip
 266         ;; attributes for which we cannot convert them to a well-known name.
 267         (when (eq (ignore-errors (soap-l2wk (car a))) attribute)
 268           (throw 'found (cdr a)))))))
 269
 270 \f
 271 ;;;; XML namespaces
 272
 273 ;; An element in an XML namespace, "things" stored in soap-xml-namespaces will
 274 ;; be derived from this object.
 275
 276 (defstruct soap-element
 277   name
 278   ;; The "well-known" namespace tag for the element.  For example, while
 279   ;; parsing XML documents, we can have different tags for the XMLSchema
 280   ;; namespace, but internally all our XMLSchema elements will have the "xsd"
 281   ;; tag.
 282   namespace-tag)
 283
 284 (defun soap-element-fq-name (element)
 285   "Return a fully qualified name for ELEMENT.
 286 A fq name is the concatenation of the namespace tag and the
 287 element name."
 288   (concat (soap-element-namespace-tag element)
 289           ":" (soap-element-name element)))
 290
 291 ;; a namespace link stores an alias for an object in once namespace to a
 292 ;; "target" object possibly in a different namespace
 293
 294 (defstruct (soap-namespace-link (:include soap-element))
 295   target)
 296
 297 ;; A namespace is a collection of soap-element objects under a name (the name
 298 ;; of the namespace).
 299
 300 (defstruct soap-namespace
 301   (name nil :read-only t)               ; e.g "http://xml.apache.org/xml-soap"
 302   (elements (make-hash-table :test 'equal) :read-only t))
 303
 304 (defun soap-namespace-put (element ns)
 305   "Store ELEMENT in NS.
 306 Multiple elements with the same name can be stored in a
 307 namespace.  When retrieving the element you can specify a
 308 discriminant predicate to `soap-namespace-get'"
 309   (let ((name (soap-element-name element)))
 310     (push element (gethash name (soap-namespace-elements ns)))))
 311
 312 (defun soap-namespace-put-link (name target ns &optional replace)
 313   "Store a link from NAME to TARGET in NS.
 314 An error will be signaled if an element by the same name is
 315 already present in NS, unless REPLACE is non nil.
 316
 317 TARGET can be either a SOAP-ELEMENT or a string denoting an
 318 element name into another namespace.
 319
 320 If NAME is nil, an element with the same name as TARGET will be
 321 added to the namespace."
 322
 323   (unless (and name (not (equal name "")))
 324     ;; if name is nil, use TARGET as a name...
 325     (cond ((soap-element-p target)
 326            (setq name (soap-element-name target)))
 327           ((consp target)               ; a fq name: (namespace . name)
 328            (setq name (cdr target)))
 329           ((stringp target)
 330            (cond ((string-match "^\\(.*\\):\\(.*\\)$" target)
 331                   (setq name (match-string 2 target)))
 332                  (t
 333                   (setq name target))))))
 334
 335   ;; by now, name should be valid
 336   (assert (and name (not (equal name "")))
 337           nil
 338           "Cannot determine name for namespace link")
 339   (push (make-soap-namespace-link :name name :target target)
 340         (gethash name (soap-namespace-elements ns))))
 341
 342 (defun soap-namespace-get (name ns &optional discriminant-predicate)
 343   "Retrieve an element with NAME from the namespace NS.
 344 If multiple elements with the same name exist,
 345 DISCRIMINANT-PREDICATE is used to pick one of them.  This allows
 346 storing elements of different types (like a message type and a
 347 binding) but the same name."
 348   (assert (stringp name))
 349   (let ((elements (gethash name (soap-namespace-elements ns))))
 350     (cond (discriminant-predicate
 351            (catch 'found
 352              (dolist (e elements)
 353                (when (funcall discriminant-predicate e)
 354                  (throw 'found e)))))
 355           ((= (length elements) 1) (car elements))
 356           ((> (length elements) 1)
 357            (error
 358             "Soap-namespace-get(%s): multiple elements, discriminant needed"
 359             name))
 360           (t
 361            nil))))
 362
 363 \f
 364 ;;;; WSDL documents
 365 ;;;;; WSDL document elements
 366
 367 (defstruct (soap-basic-type (:include soap-element))
 368   kind                              ; a symbol of: string, dateTime, long, int
 369   )
 370
 371 (defstruct soap-sequence-element
 372   name type nillable? multiple?)
 373
 374 (defstruct (soap-sequence-type (:include soap-element))
 375   parent                                ; OPTIONAL WSDL-TYPE name
 376   elements                              ; LIST of SOAP-SEQUENCE-ELEMENT
 377   )
 378
 379 (defstruct (soap-array-type (:include soap-element))
 380   element-type                          ; WSDL-TYPE of the array elements
 381   )
 382
 383 (defstruct (soap-message (:include soap-element))
 384   parts                                 ; ALIST of NAME => WSDL-TYPE name
 385   )
 386
 387 (defstruct (soap-operation (:include soap-element))
 388   parameter-order
 389   input                                 ; (NAME . MESSAGE)
 390   output                                ; (NAME . MESSAGE)
 391   faults)                               ; a list of (NAME . MESSAGE)
 392
 393 (defstruct (soap-port-type (:include soap-element))
 394   operations)                           ; a namespace of operations
 395
 396 ;; A bound operation is an operation which has a soap action and a use
 397 ;; method attached -- these are attached as part of a binding and we
 398 ;; can have different bindings for the same operations.
 399 (defstruct soap-bound-operation
 400   operation                             ; SOAP-OPERATION
 401   soap-action                           ; value for SOAPAction HTTP header
 402   use                                   ; 'literal or 'encoded, see
 403                                         ; http://www.w3.org/TR/wsdl#_soap:body
 404   )
 405
 406 (defstruct (soap-binding (:include soap-element))
 407   port-type
 408   (operations (make-hash-table :test 'equal) :readonly t))
 409
 410 (defstruct (soap-port (:include soap-element))
 411   service-url
 412   binding)
 413
 414 (defun soap-default-xsd-types ()
 415   "Return a namespace containing some of the XMLSchema types."
 416   (let ((ns (make-soap-namespace :name "http://www.w3.org/2001/XMLSchema")))
 417     (dolist (type '("string" "dateTime" "boolean" "long" "int" "float"
 418                     "base64Binary" "anyType" "Array" "byte[]"))
 419       (soap-namespace-put
 420        (make-soap-basic-type :name type :kind (intern type))
 421        ns))
 422     ns))
 423
 424 (defun soap-default-soapenc-types ()
 425   "Return a namespace containing some of the SOAPEnc types."
 426   (let ((ns (make-soap-namespace
 427              :name "http://schemas.xmlsoap.org/soap/encoding/")))
 428     (dolist (type '("string" "dateTime" "boolean" "long" "int" "float"
 429                     "base64Binary" "anyType" "Array" "byte[]"))
 430       (soap-namespace-put
 431        (make-soap-basic-type :name type :kind (intern type))
 432        ns))
 433     ns))
 434
 435 (defun soap-type-p (element)
 436   "Return t if ELEMENT is a SOAP data type (basic or complex)."
 437   (or (soap-basic-type-p element)
 438       (soap-sequence-type-p element)
 439       (soap-array-type-p element)))
 440
 441
 442 ;;;;; The WSDL document
 443
 444 ;; The WSDL data structure used for encoding/decoding SOAP messages
 445 (defstruct soap-wsdl
 446   origin                         ; file or URL from which this wsdl was loaded
 447   ports                          ; a list of SOAP-PORT instances
 448   alias-table                    ; a list of namespace aliases
 449   namespaces                     ; a list of namespaces
 450   )
 451
 452 (defun soap-wsdl-add-alias (alias name wsdl)
 453   "Add a namespace ALIAS for NAME to the WSDL document."
 454   (push (cons alias name) (soap-wsdl-alias-table wsdl)))
 455
 456 (defun soap-wsdl-find-namespace (name wsdl)
 457   "Find a namespace by NAME in the WSDL document."
 458   (catch 'found
 459     (dolist (ns (soap-wsdl-namespaces wsdl))
 460       (when (equal name (soap-namespace-name ns))
 461         (throw 'found ns)))))
 462
 463 (defun soap-wsdl-add-namespace (ns wsdl)
 464   "Add the namespace NS to the WSDL document.
 465 If a namespace by this name already exists in WSDL, individual
 466 elements will be added to it."
 467   (let ((existing (soap-wsdl-find-namespace (soap-namespace-name ns) wsdl)))
 468     (if existing
 469         ;; Add elements from NS to EXISTING, replacing existing values.
 470         (maphash (lambda (key value)
 471                    (dolist (v value)
 472                      (soap-namespace-put v existing)))
 473                  (soap-namespace-elements ns))
 474         (push ns (soap-wsdl-namespaces wsdl)))))
 475
 476 (defun soap-wsdl-get (name wsdl &optional predicate use-local-alias-table)
 477   "Retrieve element NAME from the WSDL document.
 478
 479 PREDICATE is used to differentiate between elements when NAME
 480 refers to multiple elements.  A typical value for this would be a
 481 structure predicate for the type of element you want to retrieve.
 482 For example, to retrieve a message named \"foo\" when other
 483 elements named \"foo\" exist in the WSDL you could use:
 484
 485   (soap-wsdl-get \"foo\" WSDL 'soap-message-p)
 486
 487 If USE-LOCAL-ALIAS-TABLE is not nil, `soap-local-xmlns` will be
 488 used to resolve the namespace alias."
 489   (let ((alias-table (soap-wsdl-alias-table wsdl))
 490         namespace element-name element)
 491
 492     (when (symbolp name)
 493       (setq name (symbol-name name)))
 494
 495     (when use-local-alias-table
 496       (setq alias-table (append soap-local-xmlns alias-table)))
 497
 498     (cond ((consp name) ; a fully qualified name, as returned by `soap-l2fq'
 499            (setq element-name (cdr name))
 500            (when (symbolp element-name)
 501              (setq element-name (symbol-name element-name)))
 502            (setq namespace (soap-wsdl-find-namespace (car name) wsdl))
 503            (unless namespace
 504              (error "Soap-wsdl-get(%s): unknown namespace: %s" name namespace)))
 505
 506           ((string-match "^\\(.*\\):\\(.*\\)$" name)
 507            (setq element-name (match-string 2 name))
 508
 509            (let* ((ns-alias (match-string 1 name))
 510                   (ns-name (cdr (assoc ns-alias alias-table))))
 511              (unless ns-name
 512                (error "Soap-wsdl-get(%s): cannot find namespace alias %s"
 513                       name ns-alias))
 514
 515              (setq namespace (soap-wsdl-find-namespace ns-name wsdl))
 516              (unless namespace
 517                (error
 518                 "Soap-wsdl-get(%s): unknown namespace %s, referenced by alias %s"
 519                 name ns-name ns-alias))))
 520           (t
 521            (error "Soap-wsdl-get(%s): bad name" name)))
 522
 523     (setq element (soap-namespace-get
 524                    element-name namespace
 525                    (if predicate
 526                        (lambda (e)
 527                          (or (funcall 'soap-namespace-link-p e)
 528                              (funcall predicate e)))
 529                        nil)))
 530
 531     (unless element
 532       (error "Soap-wsdl-get(%s): cannot find element" name))
 533
 534     (if (soap-namespace-link-p element)
 535         ;; NOTE: don't use the local alias table here
 536         (soap-wsdl-get (soap-namespace-link-target element) wsdl predicate)
 537         element)))
 538
 539 ;;;;; Resolving references for wsdl types
 540
 541 ;; See `soap-wsdl-resolve-references', which is the main entry point for
 542 ;; resolving references
 543
 544 (defun soap-resolve-references-for-element (element wsdl)
 545   "Resolve references in ELEMENT using the WSDL document.
 546 This is a generic function which invokes a specific function
 547 depending on the element type.
 548
 549 If ELEMENT has no resolver function, it is silently ignored.
 550
 551 All references are resolved in-place, that is the ELEMENT is
 552 updated."
 553   (let ((resolver (get (aref element 0) 'soap-resolve-references)))
 554     (when resolver
 555       (funcall resolver element wsdl))))
 556
 557 (defun soap-resolve-references-for-sequence-type (type wsdl)
 558   "Resolve references for a sequence TYPE using WSDL document.
 559 See also `soap-resolve-references-for-element' and
 560 `soap-wsdl-resolve-references'"
 561   (let ((parent (soap-sequence-type-parent type)))
 562     (when (or (consp parent) (stringp parent))
 563       (setf (soap-sequence-type-parent type)
 564             (soap-wsdl-get parent wsdl 'soap-type-p))))
 565   (dolist (element (soap-sequence-type-elements type))
 566     (let ((element-type (soap-sequence-element-type element)))
 567       (cond ((or (consp element-type) (stringp element-type))
 568              (setf (soap-sequence-element-type element)
 569                    (soap-wsdl-get element-type wsdl 'soap-type-p)))
 570             ((soap-element-p element-type)
 571              ;; since the element already has a child element, it
 572              ;; could be an inline structure.  we must resolve
 573              ;; references in it, because it might not be reached by
 574              ;; scanning the wsdl names.
 575              (soap-resolve-references-for-element element-type wsdl))))))
 576
 577 (defun soap-resolve-references-for-array-type (type wsdl)
 578   "Resolve references for an array TYPE using WSDL.
 579 See also `soap-resolve-references-for-element' and
 580 `soap-wsdl-resolve-references'"
 581   (let ((element-type (soap-array-type-element-type type)))
 582     (when (or (consp element-type) (stringp element-type))
 583       (setf (soap-array-type-element-type type)
 584             (soap-wsdl-get element-type wsdl 'soap-type-p)))))
 585
 586 (defun soap-resolve-references-for-message (message wsdl)
 587   "Resolve references for a MESSAGE type using the WSDL document.
 588 See also `soap-resolve-references-for-element' and
 589 `soap-wsdl-resolve-references'"
 590   (let (resolved-parts)
 591     (dolist (part (soap-message-parts message))
 592       (let ((name (car part))
 593             (type (cdr part)))
 594         (when (stringp name)
 595           (setq name (intern name)))
 596         (when (or (consp type) (stringp type))
 597           (setq type (soap-wsdl-get type wsdl 'soap-type-p)))
 598         (push (cons name type) resolved-parts)))
 599      (setf (soap-message-parts message) (nreverse resolved-parts))))
 600
 601 (defun soap-resolve-references-for-operation (operation wsdl)
 602   "Resolve references for an OPERATION type using the WSDL document.
 603 See also `soap-resolve-references-for-element' and
 604 `soap-wsdl-resolve-references'"
 605   (let ((input (soap-operation-input operation))
 606         (counter 0))
 607     (let ((name (car input))
 608           (message (cdr input)))
 609       ;; Name this part if it was not named
 610       (when (or (null name) (equal name ""))
 611         (setq name (format "in%d" (incf counter))))
 612       (when (or (consp message) (stringp message))
 613         (setf (soap-operation-input operation)
 614               (cons (intern name)
 615                     (soap-wsdl-get message wsdl 'soap-message-p))))))
 616
 617   (let ((output (soap-operation-output operation))
 618         (counter 0))
 619     (let ((name (car output))
 620           (message (cdr output)))
 621       (when (or (null name) (equal name ""))
 622         (setq name (format "out%d" (incf counter))))
 623       (when (or (consp message) (stringp message))
 624         (setf (soap-operation-output operation)
 625               (cons (intern name)
 626                     (soap-wsdl-get message wsdl 'soap-message-p))))))
 627
 628   (let ((resolved-faults nil)
 629         (counter 0))
 630     (dolist (fault (soap-operation-faults operation))
 631       (let ((name (car fault))
 632             (message (cdr fault)))
 633         (when (or (null name) (equal name ""))
 634           (setq name (format "fault%d" (incf counter))))
 635         (if (or (consp message) (stringp message))
 636             (push (cons (intern name)
 637                         (soap-wsdl-get message wsdl 'soap-message-p))
 638                   resolved-faults)
 639             (push fault resolved-faults))))
 640     (setf (soap-operation-faults operation) resolved-faults))
 641
 642   (when (= (length (soap-operation-parameter-order operation)) 0)
 643     (setf (soap-operation-parameter-order operation)
 644           (mapcar 'car (soap-message-parts
 645                         (cdr (soap-operation-input operation))))))
 646
 647   (setf (soap-operation-parameter-order operation)
 648         (mapcar (lambda (p)
 649                   (if (stringp p)
 650                       (intern p)
 651                       p))
 652                 (soap-operation-parameter-order operation))))
 653
 654 (defun soap-resolve-references-for-binding (binding wsdl)
 655  "Resolve references for a BINDING type using the WSDL document.
 656 See also `soap-resolve-references-for-element' and
 657 `soap-wsdl-resolve-references'"
 658   (when (or (consp (soap-binding-port-type binding))
 659             (stringp (soap-binding-port-type binding)))
 660     (setf (soap-binding-port-type binding)
 661           (soap-wsdl-get (soap-binding-port-type binding)
 662                          wsdl 'soap-port-type-p)))
 663
 664   (let ((port-ops (soap-port-type-operations (soap-binding-port-type binding))))
 665     (maphash (lambda (k v)
 666                (setf (soap-bound-operation-operation v)
 667                      (soap-namespace-get k port-ops 'soap-operation-p)))
 668              (soap-binding-operations binding))))
 669
 670 (defun soap-resolve-references-for-port (port wsdl)
 671   "Resolve references for a PORT type using the WSDL document.
 672 See also `soap-resolve-references-for-element' and
 673 `soap-wsdl-resolve-references'"
 674   (when (or (consp (soap-port-binding port))
 675             (stringp (soap-port-binding port)))
 676     (setf (soap-port-binding port)
 677           (soap-wsdl-get (soap-port-binding port) wsdl 'soap-binding-p))))
 678
 679 ;; Install resolvers for our types
 680 (progn
 681   (put (aref (make-soap-sequence-type) 0) 'soap-resolve-references
 682        'soap-resolve-references-for-sequence-type)
 683   (put (aref (make-soap-array-type) 0) 'soap-resolve-references
 684        'soap-resolve-references-for-array-type)
 685   (put (aref (make-soap-message) 0) 'soap-resolve-references
 686        'soap-resolve-references-for-message)
 687   (put (aref (make-soap-operation) 0) 'soap-resolve-references
 688        'soap-resolve-references-for-operation)
 689   (put (aref (make-soap-binding) 0) 'soap-resolve-references
 690        'soap-resolve-references-for-binding)
 691   (put (aref (make-soap-port) 0) 'soap-resolve-references
 692        'soap-resolve-references-for-port))
 693
 694 (defun soap-wsdl-resolve-references (wsdl)
 695   "Resolve all references inside the WSDL structure.
 696
 697 When the WSDL elements are created from the XML document, they
 698 refer to each other by name.  For example, the ELEMENT-TYPE slot
 699 of an SOAP-ARRAY-TYPE will contain the name of the element and
 700 the user would have to call `soap-wsdl-get' to obtain the actual
 701 element.
 702
 703 After the entire document is loaded, we resolve all these
 704 references to the actual elements they refer to so that at
 705 runtime, we don't have to call `soap-wsdl-get' each time we
 706 traverse an element tree."
 707   (let ((nprocessed 0)
 708         (nstag-id 0)
 709         (alias-table (soap-wsdl-alias-table wsdl)))
 710     (dolist (ns (soap-wsdl-namespaces wsdl))
 711       (let ((nstag (car-safe (rassoc (soap-namespace-name ns) alias-table))))
 712         (unless nstag
 713           ;; If this namespace does not have an alias, create one for it.
 714           (catch 'done
 715             (while t
 716               (setq nstag (format "ns%d" (incf nstag-id)))
 717               (unless (assoc nstag alias-table)
 718                 (soap-wsdl-add-alias nstag (soap-namespace-name ns) wsdl)
 719                 (throw 'done t)))))
 720
 721         (maphash (lambda (name element)
 722                    (cond ((soap-element-p element) ; skip links
 723                           (incf nprocessed)
 724                           (soap-resolve-references-for-element element wsdl)
 725                           (setf (soap-element-namespace-tag element) nstag))
 726                          ((listp element)
 727                           (dolist (e element)
 728                             (when (soap-element-p e)
 729                               (incf nprocessed)
 730                               (soap-resolve-references-for-element e wsdl)
 731                               (setf (soap-element-namespace-tag e) nstag))))))
 732                  (soap-namespace-elements ns)))))
 733     wsdl)
 734
 735 ;;;;; Loading WSDL from XML documents
 736
 737 (defun soap-load-wsdl-from-url (url)
 738   "Load a WSDL document from URL and return it.
 739 The returned WSDL document needs to be used for `soap-invoke'
 740 calls."
 741   (let ((url-request-method "GET")
 742         (url-package-name "soap-client.el")
 743         (url-package-version "1.0")
 744         (url-mime-charset-string "utf-8;q=1, iso-8859-1;q=0.5")
 745         (url-request-coding-system 'utf-8)
 746         (url-http-attempt-keepalives nil))
 747     (let ((buffer (url-retrieve-synchronously url)))
 748       (with-current-buffer buffer
 749         (declare (special url-http-response-status))
 750         (if (> url-http-response-status 299)
 751             (error "Error retrieving WSDL: %s" url-http-response-status))
 752         (let ((mime-part (mm-dissect-buffer t t)))
 753           (unless mime-part
 754             (error "Failed to decode response from server"))
 755           (unless (equal (car (mm-handle-type mime-part)) "text/xml")
 756             (error "Server response is not an XML document"))
 757           (with-temp-buffer
 758             (mm-insert-part mime-part)
 759             (let ((wsdl-xml (car (xml-parse-region (point-min) (point-max)))))
 760               (prog1
 761                   (let ((wsdl (soap-parse-wsdl wsdl-xml)))
 762                     (setf (soap-wsdl-origin wsdl) url)
 763                     wsdl)
 764                 (kill-buffer buffer)))))))))
 765
 766 (defun soap-load-wsdl (file)
 767   "Load a WSDL document from FILE and return it."
 768   (with-temp-buffer
 769     (insert-file-contents file)
 770     (let ((xml (car (xml-parse-region (point-min) (point-max)))))
 771       (let ((wsdl (soap-parse-wsdl xml)))
 772         (setf (soap-wsdl-origin wsdl) file)
 773         wsdl))))
 774
 775 (defun soap-parse-wsdl (node)
 776   "Construct a WSDL structure from NODE, which is an XML document."
 777   (soap-with-local-xmlns node
 778
 779     (assert (eq (soap-l2wk (xml-node-name node)) 'wsdl:definitions)
 780             nil
 781             "soap-parse-wsdl: expecting wsdl:definitions node, got %s"
 782             (soap-l2wk (xml-node-name node)))
 783
 784     (let ((wsdl (make-soap-wsdl)))
 785
 786       ;; Add the local alias table to the wsdl document -- it will be used for
 787       ;; all types in this document even after we finish parsing it.
 788       (setf (soap-wsdl-alias-table wsdl) soap-local-xmlns)
 789
 790       ;; Add the XSD types to the wsdl document
 791       (let ((ns (soap-default-xsd-types)))
 792         (soap-wsdl-add-namespace ns wsdl)
 793         (soap-wsdl-add-alias "xsd" (soap-namespace-name ns) wsdl))
 794
 795       ;; Add the soapenc types to the wsdl document
 796       (let ((ns (soap-default-soapenc-types)))
 797         (soap-wsdl-add-namespace ns wsdl)
 798         (soap-wsdl-add-alias "soapenc" (soap-namespace-name ns) wsdl))
 799
 800       ;; Find all the 'xsd:schema nodes which are children of wsdl:types nodes
 801       ;; and build our type-library
 802
 803       (let ((types (car (soap-xml-get-children1 node 'wsdl:types))))
 804         (dolist (node (xml-node-children types))
 805           ;; We cannot use (xml-get-children node (soap-wk2l 'xsd:schema))
 806           ;; because each node can install its own alias type so the schema
 807           ;; nodes might have a different prefix.
 808           (when (consp node)
 809             (soap-with-local-xmlns node
 810               (when (eq (soap-l2wk (xml-node-name node)) 'xsd:schema)
 811                 (soap-wsdl-add-namespace (soap-parse-schema node) wsdl))))))
 812
 813       (let ((ns (make-soap-namespace :name (soap-get-target-namespace node))))
 814         (dolist (node (soap-xml-get-children1 node 'wsdl:message))
 815           (soap-namespace-put (soap-parse-message node) ns))
 816
 817         (dolist (node (soap-xml-get-children1 node 'wsdl:portType))
 818           (let ((port-type (soap-parse-port-type node)))
 819             (soap-namespace-put port-type ns)
 820             (soap-wsdl-add-namespace
 821              (soap-port-type-operations port-type) wsdl)))
 822
 823         (dolist (node (soap-xml-get-children1 node 'wsdl:binding))
 824           (soap-namespace-put (soap-parse-binding node) ns))
 825
 826         (dolist (node (soap-xml-get-children1 node 'wsdl:service))
 827           (dolist (node (soap-xml-get-children1 node 'wsdl:port))
 828             (let ((name (xml-get-attribute node 'name))
 829                   (binding (xml-get-attribute node 'binding))
 830                   (url (let ((n (car (soap-xml-get-children1
 831                                       node 'wsdlsoap:address))))
 832                          (xml-get-attribute n 'location))))
 833               (let ((port (make-soap-port
 834                            :name name :binding (soap-l2fq binding 'tns)
 835                            :service-url url)))
 836                 (soap-namespace-put port ns)
 837                 (push port (soap-wsdl-ports wsdl))))))
 838
 839         (soap-wsdl-add-namespace ns wsdl))
 840
 841       (soap-wsdl-resolve-references wsdl)
 842
 843       wsdl)))
 844
 845 (defun soap-parse-schema (node)
 846   "Parse a schema NODE.
 847 Return a SOAP-NAMESPACE containing the elements."
 848   (soap-with-local-xmlns node
 849     (assert (eq (soap-l2wk (xml-node-name node)) 'xsd:schema)
 850             nil
 851             "soap-parse-schema: expecting an xsd:schema node, got %s"
 852             (soap-l2wk (xml-node-name node)))
 853     (let ((ns (make-soap-namespace :name (soap-get-target-namespace node))))
 854       ;; NOTE: we only extract the complexTypes from the schema, we wouldn't
 855       ;; know how to handle basic types beyond the built in ones anyway.
 856       (dolist (node (soap-xml-get-children1 node 'xsd:complexType))
 857         (soap-namespace-put (soap-parse-complex-type node) ns))
 858
 859       (dolist (node (soap-xml-get-children1 node 'xsd:element))
 860         (soap-namespace-put (soap-parse-schema-element node) ns))
 861
 862       ns)))
 863
 864 (defun soap-parse-schema-element (node)
 865   "Parse NODE and construct a schema element from it."
 866   (assert (eq (soap-l2wk (xml-node-name node)) 'xsd:element)
 867           nil
 868           "soap-parse-schema-element: expecting xsd:element node, got %s"
 869           (soap-l2wk (xml-node-name node)))
 870   (let ((name (xml-get-attribute-or-nil node 'name))
 871         type)
 872     ;; A schema element that contains an inline complex type --
 873     ;; construct the actual complex type for it.
 874     (let ((type-node (soap-xml-get-children1 node 'xsd:complexType)))
 875       (when (> (length type-node) 0)
 876         (assert (= (length type-node) 1)) ; only one complex type
 877                                           ; definition per element
 878         (setq type (soap-parse-complex-type (car type-node)))))
 879     (setf (soap-element-name type) name)
 880     type))
 881
 882 (defun soap-parse-complex-type (node)
 883   "Parse NODE and construct a complex type from it."
 884   (assert (eq (soap-l2wk (xml-node-name node)) 'xsd:complexType)
 885           nil
 886           "soap-parse-complex-type: expecting xsd:complexType node, got %s"
 887           (soap-l2wk (xml-node-name node)))
 888   (let ((name (xml-get-attribute-or-nil node 'name))
 889         ;; Use a dummy type for the complex type, it will be replaced
 890         ;; with the real type below, except when the complex type node
 891         ;; is empty...
 892         (type (make-soap-sequence-type :elements nil)))
 893     (dolist (c (xml-node-children node))
 894       (when (consp c)               ; skip string nodes, which are whitespace
 895         (let ((node-name (soap-l2wk (xml-node-name c))))
 896           (cond
 897             ;; The difference between xsd:all and xsd:sequence is that fields
 898             ;; in xsd:all are not ordered and they can occur only once.  We
 899             ;; don't care about that difference in soap-client.el
 900             ((or (eq node-name 'xsd:sequence)
 901                  (eq node-name 'xsd:all))
 902              (setq type (soap-parse-complex-type-sequence c)))
 903             ((eq node-name 'xsd:complexContent)
 904              (setq type (soap-parse-complex-type-complex-content c)))
 905             ((eq node-name 'xsd:attribute)
 906              ;; The name of this node comes from an attribute tag
 907              (let ((n (xml-get-attribute-or-nil c 'name)))
 908                (setq name n)))
 909             (t
 910              (error "Unknown node type %s" node-name))))))
 911     (setf (soap-element-name type) name)
 912     type))
 913
 914 (defun soap-parse-sequence (node)
 915   "Parse NODE and a list of sequence elements that it defines.
 916 NODE is assumed to be an xsd:sequence node.  In that case, each
 917 of its children is assumed to be a sequence element.  Each
 918 sequence element is parsed constructing the corresponding type.
 919 A list of these types is returned."
 920   (assert (let ((n (soap-l2wk (xml-node-name node))))
 921             (memq n '(xsd:sequence xsd:all)))
 922           nil
 923           "soap-parse-sequence: expecting xsd:sequence or xsd:all node, got %s"
 924           (soap-l2wk (xml-node-name node)))
 925   (let (elements)
 926     (dolist (e (soap-xml-get-children1 node 'xsd:element))
 927       (let ((name (xml-get-attribute-or-nil e 'name))
 928             (type (xml-get-attribute-or-nil e 'type))
 929             (nillable? (or (equal (xml-get-attribute-or-nil e 'nillable) "true")
 930                            (let ((e (xml-get-attribute-or-nil e 'minOccurs)))
 931                              (and e (equal e "0")))))
 932             (multiple? (let ((e (xml-get-attribute-or-nil e 'maxOccurs)))
 933                          (and e (not (equal e "1"))))))
 934         (if type
 935             (setq type (soap-l2fq type 'tns))
 936
 937             ;; The node does not have a type, maybe it has a complexType
 938             ;; defined inline...
 939             (let ((type-node (soap-xml-get-children1 e 'xsd:complexType)))
 940               (when (> (length type-node) 0)
 941                 (assert (= (length type-node) 1)
 942                         nil
 943                         "only one complex type definition per element supported")
 944                 (setq type (soap-parse-complex-type (car type-node))))))
 945
 946         (push (make-soap-sequence-element
 947                :name (intern name) :type type :nillable? nillable?
 948                :multiple? multiple?)
 949               elements)))
 950     (nreverse elements)))
 951
 952 (defun soap-parse-complex-type-sequence (node)
 953   "Parse NODE as a sequence type."
 954   (let ((elements (soap-parse-sequence node)))
 955     (make-soap-sequence-type :elements elements)))
 956
 957 (defun soap-parse-complex-type-complex-content (node)
 958   "Parse NODE as a xsd:complexContent node.
 959 A sequence or an array type is returned depending on the actual
 960 contents."
 961   (assert (eq (soap-l2wk (xml-node-name node)) 'xsd:complexContent)
 962           nil
 963           "soap-parse-complex-type-complex-content: expecting xsd:complexContent node, got %s"
 964           (soap-l2wk (xml-node-name node)))
 965   (let (array? parent elements)
 966     (let ((extension (car-safe (soap-xml-get-children1 node 'xsd:extension)))
 967           (restriction (car-safe
 968                         (soap-xml-get-children1 node 'xsd:restriction))))
 969       ;; a complex content node is either an extension or a restriction
 970       (cond (extension
 971              (setq parent (xml-get-attribute-or-nil extension 'base))
 972              (setq elements (soap-parse-sequence
 973                              (car (soap-xml-get-children1
 974                                    extension 'xsd:sequence)))))
 975             (restriction
 976              (let ((base (xml-get-attribute-or-nil restriction 'base)))
 977                (assert (equal base "soapenc:Array")
 978                        nil
 979                        "restrictions supported only for soapenc:Array types, this is a %s"
 980                        base))
 981              (setq array? t)
 982              (let ((attribute (car (soap-xml-get-children1
 983                                     restriction 'xsd:attribute))))
 984                (let ((array-type (soap-xml-get-attribute-or-nil1
 985                                   attribute 'wsdl:arrayType)))
 986                  (when (string-match "^\\(.*\\)\\[\\]$" array-type)
 987                    (setq parent (match-string 1 array-type))))))
 988
 989             (t
 990              (error "Unknown complex type"))))
 991
 992     (if parent
 993         (setq parent (soap-l2fq parent 'tns)))
 994
 995     (if array?
 996         (make-soap-array-type :element-type parent)
 997         (make-soap-sequence-type :parent parent :elements elements))))
 998
 999 (defun soap-parse-message (node)
1000   "Parse NODE as a wsdl:message and return the corresponding type."
1001   (assert (eq (soap-l2wk (xml-node-name node)) 'wsdl:message)
1002           nil
1003           "soap-parse-message: expecting wsdl:message node, got %s"
1004           (soap-l2wk (xml-node-name node)))
1005   (let ((name (xml-get-attribute-or-nil node 'name))
1006         parts)
1007     (dolist (p (soap-xml-get-children1 node 'wsdl:part))
1008       (let ((name (xml-get-attribute-or-nil p 'name))
1009             (type (xml-get-attribute-or-nil p 'type))
1010             (element (xml-get-attribute-or-nil p 'element)))
1011
1012         (when type
1013           (setq type (soap-l2fq type 'tns)))
1014
1015         (when element
1016           (setq element (soap-l2fq element 'tns)))
1017
1018         (push (cons name (or type element)) parts)))
1019     (make-soap-message :name name :parts (nreverse parts))))
1020
1021 (defun soap-parse-port-type (node)
1022   "Parse NODE as a wsdl:portType and return the corresponding port."
1023   (assert (eq (soap-l2wk (xml-node-name node)) 'wsdl:portType)
1024           nil
1025           "soap-parse-port-type: expecting wsdl:portType node got %s"
1026           (soap-l2wk (xml-node-name node)))
1027   (let ((ns (make-soap-namespace
1028              :name (concat "urn:" (xml-get-attribute node 'name)))))
1029     (dolist (node (soap-xml-get-children1 node 'wsdl:operation))
1030       (let ((o (soap-parse-operation node)))
1031
1032         (let ((other-operation (soap-namespace-get
1033                                 (soap-element-name o) ns 'soap-operation-p)))
1034           (if other-operation
1035               ;; Unfortunately, the Confluence WSDL defines two operations
1036               ;; named "search" which differ only in parameter names...
1037               (soap-warning "Discarding duplicate operation: %s"
1038                             (soap-element-name o))
1039
1040               (progn
1041                 (soap-namespace-put o ns)
1042
1043                 ;; link all messages from this namespace, as this namespace
1044                 ;; will be used for decoding the response.
1045                 (destructuring-bind (name . message) (soap-operation-input o)
1046                   (soap-namespace-put-link name message ns))
1047
1048                 (destructuring-bind (name . message) (soap-operation-output o)
1049                   (soap-namespace-put-link name message ns))
1050
1051                 (dolist (fault (soap-operation-faults o))
1052                   (destructuring-bind (name . message) fault
1053                     (soap-namespace-put-link name message ns 'replace)))
1054
1055                 )))))
1056
1057     (make-soap-port-type :name (xml-get-attribute node 'name)
1058                         :operations ns)))
1059
1060 (defun soap-parse-operation (node)
1061   "Parse NODE as a wsdl:operation and return the corresponding type."
1062   (assert (eq (soap-l2wk (xml-node-name node)) 'wsdl:operation)
1063           nil
1064           "soap-parse-operation: expecting wsdl:operation node, got %s"
1065           (soap-l2wk (xml-node-name node)))
1066   (let ((name (xml-get-attribute node 'name))
1067         (parameter-order (split-string
1068                           (xml-get-attribute node 'parameterOrder)))
1069         input output faults)
1070     (dolist (n (xml-node-children node))
1071       (when (consp n)                 ; skip string nodes which are whitespace
1072         (let ((node-name (soap-l2wk (xml-node-name n))))
1073           (cond
1074             ((eq node-name 'wsdl:input)
1075              (let ((message (xml-get-attribute n 'message))
1076                    (name (xml-get-attribute n 'name)))
1077                (setq input (cons name (soap-l2fq message 'tns)))))
1078             ((eq node-name 'wsdl:output)
1079              (let ((message (xml-get-attribute n 'message))
1080                    (name (xml-get-attribute n 'name)))
1081                (setq output (cons name (soap-l2fq message 'tns)))))
1082             ((eq node-name 'wsdl:fault)
1083              (let ((message (xml-get-attribute n 'message))
1084                    (name (xml-get-attribute n 'name)))
1085                (push (cons name (soap-l2fq message 'tns)) faults)))))))
1086     (make-soap-operation
1087      :name name
1088      :parameter-order parameter-order
1089      :input input
1090      :output output
1091      :faults (nreverse faults))))
1092
1093 (defun soap-parse-binding (node)
1094   "Parse NODE as a wsdl:binding and return the corresponding type."
1095   (assert (eq (soap-l2wk (xml-node-name node)) 'wsdl:binding)
1096           nil
1097           "soap-parse-binding: expecting wsdl:binding node, got %s"
1098           (soap-l2wk (xml-node-name node)))
1099   (let ((name (xml-get-attribute node 'name))
1100         (type (xml-get-attribute node 'type)))
1101     (let ((binding (make-soap-binding :name name
1102                                       :port-type (soap-l2fq type 'tns))))
1103       (dolist (wo (soap-xml-get-children1 node 'wsdl:operation))
1104         (let ((name (xml-get-attribute wo 'name))
1105               soap-action
1106               use)
1107           (dolist (so (soap-xml-get-children1 wo 'wsdlsoap:operation))
1108             (setq soap-action (xml-get-attribute-or-nil so 'soapAction)))
1109
1110           ;; Search a wsdlsoap:body node and find a "use" tag.  The
1111           ;; same use tag is assumed to be present for both input and
1112           ;; output types (although the WDSL spec allows separate
1113           ;; "use"-s for each of them...
1114
1115           (dolist (i (soap-xml-get-children1 wo 'wsdl:input))
1116             (dolist (b (soap-xml-get-children1 i 'wsdlsoap:body))
1117               (setq use (or use
1118                             (xml-get-attribute-or-nil b 'use)))))
1119
1120           (unless use
1121             (dolist (i (soap-xml-get-children1 wo 'wsdl:output))
1122               (dolist (b (soap-xml-get-children1 i 'wsdlsoap:body))
1123                 (setq use (or use
1124                               (xml-get-attribute-or-nil b 'use))))))
1125
1126           (puthash name (make-soap-bound-operation :operation name
1127                                                    :soap-action soap-action
1128                                                    :use (and use (intern use)))
1129                    (soap-binding-operations binding))))
1130       binding)))
1131
1132 ;;;; SOAP type decoding
1133
1134 (defvar soap-multi-refs nil
1135   "The list of multi-ref nodes in the current SOAP response.
1136 This is a dynamically bound variable used during decoding the
1137 SOAP response.")
1138
1139 (defvar soap-decoded-multi-refs nil
1140   "List of decoded multi-ref nodes in the current SOAP response.
1141 This is a dynamically bound variable used during decoding the
1142 SOAP response.")
1143
1144 (defvar soap-current-wsdl nil
1145   "The current WSDL document used when decoding the SOAP response.
1146 This is a dynamically bound variable.")
1147
1148 (defun soap-decode-type (type node)
1149   "Use TYPE (an xsd type) to decode the contents of NODE.
1150
1151 NODE is an XML node, representing some SOAP encoded value or a
1152 reference to another XML node (a multiRef).  This function will
1153 resolve the multiRef reference, if any, than call a TYPE specific
1154 decode function to perform the actual decoding."
1155   (let ((href (xml-get-attribute-or-nil node 'href)))
1156     (cond (href
1157            (catch 'done
1158              ;; NODE is actually a HREF, find the target and decode that.
1159              ;; Check first if we already decoded this multiref.
1160
1161              (let ((decoded (cdr (assoc href soap-decoded-multi-refs))))
1162                (when decoded
1163                  (throw 'done decoded)))
1164
1165              (string-match "^#\\(.*\\)$" href) ; TODO: check that it matched
1166
1167              (let ((id (match-string 1 href)))
1168                (dolist (mr soap-multi-refs)
1169                  (let ((mrid (xml-get-attribute mr 'id)))
1170                    (when (equal id mrid)
1171                      ;; recurse here, in case there are multiple HREF's
1172                      (let ((decoded (soap-decode-type type mr)))
1173                        (push (cons href decoded) soap-decoded-multi-refs)
1174                        (throw 'done decoded)))))
1175                (error "Cannot find href %s" href))))
1176           (t
1177            (soap-with-local-xmlns node
1178              (if (equal (soap-xml-get-attribute-or-nil1 node 'xsi:nil) "true")
1179                  nil
1180                  (let ((decoder (get (aref type 0) 'soap-decoder)))
1181                    (assert decoder nil "no soap-decoder for %s type"
1182                            (aref type 0))
1183                    (funcall decoder type node))))))))
1184
1185 (defun soap-decode-any-type (node)
1186   "Decode NODE using type information inside it."
1187   ;; If the NODE has type information, we use that...
1188   (let ((type (soap-xml-get-attribute-or-nil1 node 'xsi:type)))
1189     (if type
1190         (let ((wtype (soap-wsdl-get type soap-current-wsdl 'soap-type-p)))
1191           (if wtype
1192               (soap-decode-type wtype node)
1193               ;; The node has type info encoded in it, but we don't know how
1194               ;; to decode it...
1195               (error "Soap-decode-any-type: node has unknown type: %s" type)))
1196
1197         ;; No type info in the node...
1198
1199         (let ((contents (xml-node-children node)))
1200           (if (and (= (length contents) 1) (stringp (car contents)))
1201               ;; contents is just a string
1202               (car contents)
1203
1204               ;; we assume the NODE is a sequence with every element a
1205               ;; structure name
1206               (let (result)
1207                 (dolist (element contents)
1208                   (let ((key (xml-node-name element))
1209                         (value (soap-decode-any-type element)))
1210                     (push (cons key value) result)))
1211                 (nreverse result)))))))
1212
1213 (defun soap-decode-array (node)
1214   "Decode NODE as an Array using type information inside it."
1215   (let ((type (soap-xml-get-attribute-or-nil1 node 'soapenc:arrayType))
1216         (wtype nil)
1217         (contents (xml-node-children node))
1218         result)
1219     (when type
1220         ;; Type is in the format "someType[NUM]" where NUM is the number of
1221         ;; elements in the array.  We discard the [NUM] part.
1222         (setq type (replace-regexp-in-string "\\[[0-9]+\\]\\'" "" type))
1223         (setq wtype (soap-wsdl-get type soap-current-wsdl 'soap-type-p))
1224         (unless wtype
1225           ;; The node has type info encoded in it, but we don't know how to
1226           ;; decode it...
1227           (error "Soap-decode-array: node has unknown type: %s" type)))
1228     (dolist (e contents)
1229       (when (consp e)
1230         (push (if wtype
1231                   (soap-decode-type wtype e)
1232                   (soap-decode-any-type e))
1233               result)))
1234     (nreverse result)))
1235
1236 (defun soap-decode-basic-type (type node)
1237   "Use TYPE to decode the contents of NODE.
1238 TYPE is a `soap-basic-type' struct, and NODE is an XML document.
1239 A LISP value is returned based on the contents of NODE and the
1240 type-info stored in TYPE."
1241   (let ((contents (xml-node-children node))
1242         (type-kind (soap-basic-type-kind type)))
1243
1244     (if (null contents)
1245         nil
1246         (ecase type-kind
1247           (string (car contents))
1248           (dateTime (car contents))     ; TODO: convert to a date time
1249           ((long int float) (string-to-number (car contents)))
1250           (boolean (string= (downcase (car contents)) "true"))
1251           (base64Binary (base64-decode-string (car contents)))
1252           (anyType (soap-decode-any-type node))
1253           (Array (soap-decode-array node))))))
1254
1255 (defun soap-decode-sequence-type (type node)
1256   "Use TYPE to decode the contents of NODE.
1257 TYPE is assumed to be a sequence type and an ALIST with the
1258 contents of the NODE is returned."
1259   (let ((result nil)
1260         (parent (soap-sequence-type-parent type)))
1261     (when parent
1262       (setq result (nreverse (soap-decode-type parent node))))
1263     (dolist (element (soap-sequence-type-elements type))
1264       (let ((instance-count 0)
1265             (e-name (soap-sequence-element-name element))
1266             (e-type (soap-sequence-element-type element)))
1267         (dolist (node (xml-get-children node e-name))
1268           (incf instance-count)
1269           (push (cons e-name (soap-decode-type e-type node)) result))
1270         ;; Do some sanity checking
1271         (cond ((and (= instance-count 0)
1272                     (not (soap-sequence-element-nillable? element)))
1273                (soap-warning "While decoding %s: missing non-nillable slot %s"
1274                              (soap-element-name type) e-name))
1275               ((and (> instance-count 1)
1276                     (not (soap-sequence-element-multiple? element)))
1277                (soap-warning "While decoding %s: multiple slots named %s"
1278                              (soap-element-name type) e-name)))))
1279     (nreverse result)))
1280
1281 (defun soap-decode-array-type (type node)
1282   "Use TYPE to decode the contents of NODE.
1283 TYPE is assumed to be an array type.  Arrays are decoded as lists.
1284 This is because it is easier to work with list results in LISP."
1285   (let ((result nil)
1286         (element-type (soap-array-type-element-type type)))
1287     (dolist (node (xml-node-children node))
1288       (when (consp node)
1289         (push (soap-decode-type element-type node) result)))
1290     (nreverse result)))
1291
1292 (progn
1293   (put (aref (make-soap-basic-type) 0)
1294        'soap-decoder 'soap-decode-basic-type)
1295   (put (aref (make-soap-sequence-type) 0)
1296        'soap-decoder 'soap-decode-sequence-type)
1297   (put (aref (make-soap-array-type) 0)
1298        'soap-decoder 'soap-decode-array-type))
1299
1300 ;;;; Soap Envelope parsing
1301
1302 (put 'soap-error
1303      'error-conditions
1304      '(error soap-error))
1305 (put 'soap-error 'error-message "SOAP error")
1306
1307 (defun soap-parse-envelope (node operation wsdl)
1308   "Parse the SOAP envelope in NODE and return the response.
1309 OPERATION is the WSDL operation for which we expect the response,
1310 WSDL is used to decode the NODE"
1311   (soap-with-local-xmlns node
1312     (assert (eq (soap-l2wk (xml-node-name node)) 'soap:Envelope)
1313             nil
1314             "soap-parse-envelope: expecting soap:Envelope node, got %s"
1315             (soap-l2wk (xml-node-name node)))
1316     (let ((body (car (soap-xml-get-children1 node 'soap:Body))))
1317
1318       (let ((fault (car (soap-xml-get-children1 body 'soap:Fault))))
1319         (when fault
1320           (let ((fault-code (let ((n (car (xml-get-children
1321                                            fault 'faultcode))))
1322                               (car-safe (xml-node-children n))))
1323                 (fault-string (let ((n (car (xml-get-children
1324                                              fault 'faultstring))))
1325                                 (car-safe (xml-node-children n)))))
1326           (while t
1327             (signal 'soap-error (list fault-code fault-string))))))
1328
1329       ;; First (non string) element of the body is the root node of he
1330       ;; response
1331       (let ((response (if (eq (soap-bound-operation-use operation) 'literal)
1332                           ;; For 'literal uses, the response is the actual body
1333                           body
1334                           ;; ...otherwise the first non string element
1335                           ;; of the body is the response
1336                           (catch 'found
1337                             (dolist (n (xml-node-children body))
1338                               (when (consp n)
1339                                 (throw 'found n)))))))
1340         (soap-parse-response response operation wsdl body)))))
1341
1342 (defun soap-parse-response (response-node operation wsdl soap-body)
1343   "Parse RESPONSE-NODE and return the result as a LISP value.
1344 OPERATION is the WSDL operation for which we expect the response,
1345 WSDL is used to decode the NODE.
1346
1347 SOAP-BODY is the body of the SOAP envelope (of which
1348 RESPONSE-NODE is a sub-node).  It is used in case RESPONSE-NODE
1349 reference multiRef parts which are external to RESPONSE-NODE."
1350   (let* ((soap-current-wsdl wsdl)
1351          (op (soap-bound-operation-operation operation))
1352          (use (soap-bound-operation-use operation))
1353          (message (cdr (soap-operation-output op))))
1354
1355     (soap-with-local-xmlns response-node
1356
1357       (when (eq use 'encoded)
1358         (let* ((received-message-name (soap-l2fq (xml-node-name response-node)))
1359                (received-message (soap-wsdl-get
1360                                   received-message-name wsdl 'soap-message-p)))
1361           (unless (eq received-message message)
1362             (error "Unexpected message: got %s, expecting %s"
1363                    received-message-name
1364                    (soap-element-name message)))))
1365
1366       (let ((decoded-parts nil)
1367             (soap-multi-refs (xml-get-children soap-body 'multiRef))
1368             (soap-decoded-multi-refs nil))
1369
1370         (dolist (part (soap-message-parts message))
1371           (let ((tag (car part))
1372                 (type (cdr part))
1373                 node)
1374
1375             (setq node
1376                   (cond
1377                     ((eq use 'encoded)
1378                      (car (xml-get-children response-node tag)))
1379
1380                     ((eq use 'literal)
1381                      (catch 'found
1382                        (let* ((ns-aliases (soap-wsdl-alias-table wsdl))
1383                               (ns-name (cdr (assoc
1384                                              (soap-element-namespace-tag type)
1385                                              ns-aliases)))
1386                               (fqname (cons ns-name (soap-element-name type))))
1387                          (dolist (c (xml-node-children response-node))
1388                            (when (consp c)
1389                              (soap-with-local-xmlns c
1390                                (when (equal (soap-l2fq (xml-node-name c))
1391                                             fqname)
1392                                  (throw 'found c))))))))))
1393
1394             (unless node
1395               (error "Soap-parse-response(%s): cannot find message part %s"
1396                      (soap-element-name op) tag))
1397             (push (soap-decode-type type node) decoded-parts)))
1398
1399         decoded-parts))))
1400
1401 ;;;; SOAP type encoding
1402
1403 (defvar soap-encoded-namespaces nil
1404   "A list of namespace tags used during encoding a message.
1405 This list is populated by `soap-encode-value' and used by
1406 `soap-create-envelope' to add aliases for these namespace to the
1407 XML request.
1408
1409 This variable is dynamically bound in `soap-create-envelope'.")
1410
1411 (defun soap-encode-value (xml-tag value type)
1412   "Encode inside an XML-TAG the VALUE using TYPE.
1413 The resulting XML data is inserted in the current buffer
1414 at (point)/
1415
1416 TYPE is one of the soap-*-type structures which defines how VALUE
1417 is to be encoded.  This is a generic function which finds an
1418 encoder function based on TYPE and calls that encoder to do the
1419 work."
1420   (let ((encoder (get (aref type 0) 'soap-encoder)))
1421     (assert encoder nil "no soap-encoder for %s type" (aref type 0))
1422     ;; XML-TAG can be a string or a symbol, but we pass only string's to the
1423     ;; encoders
1424     (when (symbolp xml-tag)
1425       (setq xml-tag (symbol-name xml-tag)))
1426     (funcall encoder xml-tag value type))
1427   (add-to-list 'soap-encoded-namespaces (soap-element-namespace-tag type)))
1428
1429 (defun soap-encode-basic-type (xml-tag value type)
1430   "Encode inside XML-TAG the LISP VALUE according to TYPE.
1431 Do not call this function directly, use `soap-encode-value'
1432 instead."
1433   (let ((xsi-type (soap-element-fq-name type))
1434         (basic-type (soap-basic-type-kind type)))
1435
1436     ;; try to classify the type based on the value type and use that type when
1437     ;; encoding
1438     (when (eq basic-type 'anyType)
1439       (cond ((stringp value)
1440              (setq xsi-type "xsd:string" basic-type 'string))
1441             ((integerp value)
1442              (setq xsi-type "xsd:int" basic-type 'int))
1443             ((memq value '(t nil))
1444              (setq xsi-type "xsd:boolean" basic-type 'boolean))
1445             (t
1446              (error
1447               "Soap-encode-basic-type(%s, %s, %s): cannot classify anyType value"
1448               xml-tag value xsi-type))))
1449
1450     (insert "<" xml-tag " xsi:type=\"" xsi-type "\"")
1451
1452     ;; We have some ambiguity here, as a nil value represents "false" when the
1453     ;; type is boolean, we will never have a "nil" boolean type...
1454
1455     (if (or value (eq basic-type 'boolean))
1456         (progn
1457           (insert ">")
1458           (case basic-type
1459             (string
1460              (unless (stringp value)
1461                (error "Soap-encode-basic-type(%s, %s, %s): not a string value"
1462                       xml-tag value xsi-type))
1463              (insert (url-insert-entities-in-string value)))
1464
1465             (dateTime
1466              (cond ((and (consp value) ; is there a time-value-p ?
1467                          (>= (length value) 2)
1468                          (numberp (nth 0 value))
1469                          (numberp (nth 1 value)))
1470                     ;; Value is a (current-time) style value, convert
1471                     ;; to a string
1472                     (insert (format-time-string "%Y-%m-%dT%H:%M:%S" value)))
1473                    ((stringp value)
1474                     (insert (url-insert-entities-in-string value)))
1475                    (t
1476                     (error
1477                      "Soap-encode-basic-type(%s, %s, %s): not a dateTime value"
1478                      xml-tag value xsi-type))))
1479
1480             (boolean
1481              (unless (memq value '(t nil))
1482                (error "Soap-encode-basic-type(%s, %s, %s): not a boolean value"
1483                       xml-tag value xsi-type))
1484              (insert (if value "true" "false")))
1485
1486             ((long int)
1487              (unless (integerp value)
1488                (error "Soap-encode-basic-type(%s, %s, %s): not an integer value"
1489                       xml-tag value xsi-type))
1490              (insert (number-to-string value)))
1491
1492             (base64Binary
1493              (unless (stringp value)
1494                (error "Soap-encode-basic-type(%s, %s, %s): not a string value"
1495                       xml-tag value xsi-type))
1496              (insert (base64-encode-string value)))
1497
1498             (otherwise
1499              (error
1500               "Soap-encode-basic-type(%s, %s, %s): don't know how to encode"
1501               xml-tag value xsi-type))))
1502
1503         (insert " xsi:nil=\"true\">"))
1504     (insert "</" xml-tag ">\n")))
1505
1506 (defun soap-encode-sequence-type (xml-tag value type)
1507   "Encode inside XML-TAG the LISP VALUE according to TYPE.
1508 Do not call this function directly, use `soap-encode-value'
1509 instead."
1510   (let ((xsi-type (soap-element-fq-name type)))
1511     (insert "<" xml-tag " xsi:type=\"" xsi-type "\"")
1512     (if value
1513         (progn
1514           (insert ">\n")
1515           (let ((parents (list type))
1516                 (parent (soap-sequence-type-parent type)))
1517
1518             (while parent
1519               (push parent parents)
1520               (setq parent (soap-sequence-type-parent parent)))
1521
1522             (dolist (type parents)
1523               (dolist (element (soap-sequence-type-elements type))
1524                 (let ((instance-count 0)
1525                       (e-name (soap-sequence-element-name element))
1526                       (e-type (soap-sequence-element-type element)))
1527                   (dolist (v value)
1528                     (when (equal (car v) e-name)
1529                       (incf instance-count)
1530                       (soap-encode-value e-name (cdr v) e-type)))
1531
1532                   ;; Do some sanity checking
1533                   (cond ((and (= instance-count 0)
1534                               (not (soap-sequence-element-nillable? element)))
1535                          (soap-warning
1536                           "While encoding %s: missing non-nillable slot %s"
1537                           (soap-element-name type) e-name))
1538                         ((and (> instance-count 1)
1539                               (not (soap-sequence-element-multiple? element)))
1540                          (soap-warning
1541                           "While encoding %s: multiple slots named %s"
1542                           (soap-element-name type) e-name))))))))
1543         (insert " xsi:nil=\"true\">"))
1544     (insert "</" xml-tag ">\n")))
1545
1546 (defun soap-encode-array-type (xml-tag value type)
1547   "Encode inside XML-TAG the LISP VALUE according to TYPE.
1548 Do not call this function directly, use `soap-encode-value'
1549 instead."
1550   (unless (vectorp value)
1551     (error "Soap-encode: %s(%s) expects a vector, got: %s"
1552            xml-tag (soap-element-fq-name type) value))
1553   (let* ((element-type (soap-array-type-element-type type))
1554          (array-type (concat (soap-element-fq-name element-type)
1555                              "[" (format "%s" (length value)) "]")))
1556     (insert "<" xml-tag
1557             " soapenc:arrayType=\"" array-type "\" "
1558             " xsi:type=\"soapenc:Array\">\n")
1559     (loop for i below (length value)
1560          do (soap-encode-value xml-tag (aref value i) element-type))
1561     (insert "</" xml-tag ">\n")))
1562
1563 (progn
1564   (put (aref (make-soap-basic-type) 0)
1565        'soap-encoder 'soap-encode-basic-type)
1566   (put (aref (make-soap-sequence-type) 0)
1567        'soap-encoder 'soap-encode-sequence-type)
1568   (put (aref (make-soap-array-type) 0)
1569        'soap-encoder 'soap-encode-array-type))
1570
1571 (defun soap-encode-body (operation parameters wsdl)
1572   "Create the body of a SOAP request for OPERATION in the current buffer.
1573 PARAMETERS is a list of parameters supplied to the OPERATION.
1574
1575 The OPERATION and PARAMETERS are encoded according to the WSDL
1576 document."
1577   (let* ((op (soap-bound-operation-operation operation))
1578          (use (soap-bound-operation-use operation))
1579          (message (cdr (soap-operation-input op)))
1580          (parameter-order (soap-operation-parameter-order op)))
1581
1582     (unless (= (length parameter-order) (length parameters))
1583       (error "Wrong number of parameters for %s: expected %d, got %s"
1584              (soap-element-name op)
1585              (length parameter-order)
1586              (length parameters)))
1587
1588     (insert "<soap:Body>\n")
1589     (when (eq use 'encoded)
1590       (add-to-list 'soap-encoded-namespaces (soap-element-namespace-tag op))
1591       (insert "<" (soap-element-fq-name op) ">\n"))
1592
1593     (let ((param-table (loop for formal in parameter-order
1594                           for value in parameters
1595                           collect (cons formal value))))
1596       (dolist (part (soap-message-parts message))
1597         (let* ((param-name (car part))
1598                (type (cdr part))
1599                (tag-name (if (eq use 'encoded)
1600                              param-name
1601                              (soap-element-name type)))
1602                (value (cdr (assoc param-name param-table)))
1603                (start-pos (point)))
1604           (soap-encode-value tag-name value type)
1605           (when (eq use 'literal)
1606             ;; hack: add the xmlns attribute to the tag, the only way
1607             ;; ASP.NET web services recognize the namespace of the
1608             ;; element itself...
1609             (save-excursion
1610               (goto-char start-pos)
1611               (when (re-search-forward " ")
1612                 (let* ((ns (soap-element-namespace-tag type))
1613                        (namespace (cdr (assoc ns
1614                                               (soap-wsdl-alias-table wsdl)))))
1615                   (when namespace
1616                     (insert "xmlns=\"" namespace "\" ")))))))))
1617
1618     (when (eq use 'encoded)
1619       (insert "</" (soap-element-fq-name op) ">\n"))
1620     (insert "</soap:Body>\n")))
1621
1622 (defun soap-create-envelope (operation parameters wsdl)
1623   "Create a SOAP request envelope for OPERATION using PARAMETERS.
1624 WSDL is the wsdl document used to encode the PARAMETERS."
1625   (with-temp-buffer
1626     (let ((soap-encoded-namespaces '("xsi" "soap" "soapenc"))
1627           (use (soap-bound-operation-use operation)))
1628
1629       ;; Create the request body
1630       (soap-encode-body operation parameters wsdl)
1631
1632       ;; Put the envelope around the body
1633       (goto-char (point-min))
1634       (insert "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<soap:Envelope\n")
1635       (when (eq use 'encoded)
1636         (insert "    soapenc:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\"\n"))
1637       (dolist (nstag soap-encoded-namespaces)
1638         (insert "    xmlns:" nstag "=\"")
1639         (let ((nsname (cdr (assoc nstag soap-well-known-xmlns))))
1640           (unless nsname
1641             (setq nsname (cdr (assoc nstag (soap-wsdl-alias-table wsdl)))))
1642           (insert nsname)
1643         (insert "\"\n")))
1644       (insert ">\n")
1645       (goto-char (point-max))
1646       (insert "</soap:Envelope>\n"))
1647
1648     (buffer-string)))
1649
1650 ;;;; invoking soap methods
1651
1652 (defcustom soap-debug nil
1653   "When t, enable some debugging facilities."
1654   :type 'boolean
1655   :group 'soap-client)
1656
1657 (defun soap-invoke (wsdl service operation-name &rest parameters)
1658   "Invoke a SOAP operation and return the result.
1659
1660 WSDL is used for encoding the request and decoding the response.
1661 It also contains information about the WEB server address that
1662 will service the request.
1663
1664 SERVICE is the SOAP service to invoke.
1665
1666 OPERATION-NAME is the operation to invoke.
1667
1668 PARAMETERS -- the remaining parameters are used as parameters for
1669 the SOAP request.
1670
1671 NOTE: The SOAP service provider should document the available
1672 operations and their parameters for the service.  You can also
1673 use the `soap-inspect' function to browse the available
1674 operations in a WSDL document."
1675   (let ((port (catch 'found
1676                 (dolist (p (soap-wsdl-ports wsdl))
1677                   (when (equal service (soap-element-name p))
1678                     (throw 'found p))))))
1679     (unless port
1680       (error "Unknown SOAP service: %s" service))
1681
1682     (let* ((binding (soap-port-binding port))
1683            (operation (gethash operation-name
1684                                (soap-binding-operations binding))))
1685       (unless operation
1686         (error "No operation %s for SOAP service %s" operation-name service))
1687
1688       (let ((url-request-method "POST")
1689             (url-package-name "soap-client.el")
1690             (url-package-version "1.0")
1691             (url-http-version "1.0")
1692             (url-request-data (soap-create-envelope operation parameters wsdl))
1693             (url-mime-charset-string "utf-8;q=1, iso-8859-1;q=0.5")
1694             (url-request-coding-system 'utf-8)
1695             (url-http-attempt-keepalives t)
1696             (url-request-extra-headers (list
1697                                         (cons "SOAPAction"
1698                                               (soap-bound-operation-soap-action
1699                                                operation))
1700                                         (cons "Content-Type"
1701                                               "text/xml; charset=utf-8"))))
1702         (let ((buffer (url-retrieve-synchronously
1703                        (soap-port-service-url port))))
1704           (condition-case err
1705               (with-current-buffer buffer
1706                 (declare (special url-http-response-status))
1707                 (if (null url-http-response-status)
1708                     (error "No HTTP response from server"))
1709                 (if (and soap-debug (> url-http-response-status 299))
1710                     ;; This is a warning because some SOAP errors come
1711                     ;; back with a HTTP response 500 (internal server
1712                     ;; error)
1713                     (warn "Error in SOAP response: HTTP code %s"
1714                           url-http-response-status))
1715                 (let ((mime-part (mm-dissect-buffer t t)))
1716                   (unless mime-part
1717                     (error "Failed to decode response from server"))
1718                   (unless (equal (car (mm-handle-type mime-part)) "text/xml")
1719                     (error "Server response is not an XML document"))
1720                   (with-temp-buffer
1721                     (mm-insert-part mime-part)
1722                     (let ((response (car (xml-parse-region
1723                                           (point-min) (point-max)))))
1724                       (prog1
1725                           (soap-parse-envelope response operation wsdl)
1726                         (kill-buffer buffer)
1727                         (mm-destroy-part mime-part))))))
1728             (soap-error
1729              ;; Propagate soap-errors -- they are error replies of the
1730              ;; SOAP protocol and don't indicate a communication
1731              ;; problem or a bug in this code.
1732              (signal (car err) (cdr err)))
1733             (error
1734              (when soap-debug
1735                (pop-to-buffer buffer))
1736              (error (error-message-string err)))))))))
1737
1738 (provide 'soap-client)
1739
1740 \f
1741 ;;; Local Variables:
1742 ;;; eval: (outline-minor-mode 1)
1743 ;;; outline-regexp: ";;;;+"
1744 ;;; End:
1745
1746 ;;; soap-client.el ends here