/usr/src/castle-game-engine-5.2.0/base/castlexmlutils.pas is in castle-game-engine-src 5.2.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 | {
Copyright 2012-2014 Michalis Kamburelis.
This file is part of "Castle Game Engine".
"Castle Game Engine" is free software; see the file COPYING.txt,
included in this distribution, for details about the copyright.
"Castle Game Engine" 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.
----------------------------------------------------------------------------
}
{ Various XML and DOM utilities. }
unit CastleXMLUtils;
interface
uses SysUtils, DOM, CastleUtils;
{ Retrieves from Element attribute Value and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value. Value is a "var", not "out" param,
because in the latter case it's guaranteed that the old Value
will not be cleared.
@deprecated Deprecated, use Element.AttributeString instead. }
function DOMGetAttribute(const Element: TDOMElement;
const AttrName: string; var Value: string): boolean; deprecated;
{ Like DOMGetAttribute, but reads Cardinal value.
@deprecated Deprecated, use Element.AttributeCardinal instead. }
function DOMGetCardinalAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Cardinal): boolean; deprecated;
{ Like DOMGetAttribute, but reads Integer value.
@deprecated Deprecated, use Element.AttributeInteger instead. }
function DOMGetIntegerAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Integer): boolean; deprecated;
{ Like DOMGetAttribute, but reads Single value.
@deprecated Deprecated, use Element.AttributeSingle instead. }
function DOMGetSingleAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Single): boolean; deprecated;
{ Like DOMGetAttribute, but reads Float value.
@deprecated Deprecated, use Element.AttributeFloat instead. }
function DOMGetFloatAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Float): boolean; deprecated;
{ Like DOMGetAttribute, but reads Boolean value.
A boolean value is interpreted just like FPC's TXMLConfig
objects: true is designated by word @code(true), false by word
@code(false), case is ignored.
If attribute exists but it's value
is not @code(true) or @code(false), then returns @false and doesn't
modify Value paramater. So behaves just like the attribute didn't exist.
@deprecated Deprecated, use Element.AttributeBoolean instead. }
function DOMGetBooleanAttribute(const Element: TDOMElement;
const AttrName: string; var Value: boolean): boolean;
type
EDOMAttributeMissing = class(Exception);
TDOMElementHelper = class helper for TDOMElement
{ Read from Element attribute value and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value. Value is a "var", not "out" param,
because in the latter case it's guaranteed that the old Value
will not be cleared. }
function AttributeString(const AttrName: string; var Value: string): boolean;
{ Read from Element attribute value as URL and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value.
Returned URL is always absolute. The value in file may be a relative URL,
it is resolved with respect to BaseUrl, that must be absolute. }
function AttributeURL(const AttrName: string; const BaseUrl: string; var URL: string): boolean;
{ Read from Element attribute value as Cardinal and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value. }
function AttributeCardinal(const AttrName: string; var Value: Cardinal): boolean;
{ Read from Element attribute value as Integer and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value. }
function AttributeInteger(const AttrName: string; var Value: Integer): boolean;
{ Read from Element attribute value as Single and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value. }
function AttributeSingle(const AttrName: string; var Value: Single): boolean;
{ Read from Element attribute value as Float and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value. }
function AttributeFloat(const AttrName: string; var Value: Float): boolean;
{ Read from Element attribute value as Boolean and returns @true,
or (of there is no such attribute) returns @false
and does not modify Value.
A boolean value is interpreted just like FPC's TXMLConfig
objects: true is designated by word @code(true), false by word
@code(false), case is ignored.
If attribute exists but it's value
is not @code(true) or @code(false), then returns @false and doesn't
modify Value paramater. So behaves just like the attribute didn't exist. }
function AttributeBoolean(const AttrName: string; var Value: boolean): boolean;
{ Retrieves from Element given attribute as a string,
raises EDOMAttributeMissing if missing.
@raises EDOMAttributeMissing }
function AttributeString(const AttrName: string): string;
{ Retrieves from Element given attribute as an absolute URL,
raises EDOMAttributeMissing if missing.
Returned URL is always absolute. The value in file may be a relative URL,
it is resolved with respect to BaseUrl, that must be absolute.
@raises EDOMAttributeMissing }
function AttributeURL(const AttrName: string; const BaseUrl: string): string;
{ Retrieves from Element given attribute as a Cardinal,
raises EDOMAttributeMissing if missing.
@raises EDOMAttributeMissing }
function AttributeCardinal(const AttrName: string): Cardinal;
{ Retrieves from Element given attribute as an Integer,
raises EDOMAttributeMissing if missing.
@raises EDOMAttributeMissing }
function AttributeInteger(const AttrName: string): Integer;
{ Retrieves from Element given attribute as a Single,
raises EDOMAttributeMissing if missing.
@raises EDOMAttributeMissing }
function AttributeSingle(const AttrName: string): Single;
{ Retrieves from Element given attribute as a Float,
raises EDOMAttributeMissing if missing.
@raises EDOMAttributeMissing }
function AttributeFloat(const AttrName: string): Float;
{ Retrieves from Element given attribute as a boolean,
raises EDOMAttributeMissing if missing or has invalid value.
A boolean value is interpreted just like FPC's TXMLConfig
objects: true is designated by word @code(true), false by word
@code(false), case is ignored.
If attribute exists but it's value
is not @code(true) or @code(false), then raises EDOMAttributeMissing.
So behaves just like the attribute didn't exist.
@raises EDOMAttributeMissing }
function AttributeBoolean(const AttrName: string): boolean;
{ Retrieves from Element given attribute as a string, or a default value. }
function AttributeStringDef(const AttrName: string; const DefaultValue: string): string;
{ Retrieves from Element given attribute as a Cardinal, or a default value. }
function AttributeCardinalDef(const AttrName: string; const DefaultValue: Cardinal): Cardinal;
{ Retrieves from Element given attribute as an Integer, or a default value. }
function AttributeIntegerDef(const AttrName: string; const DefaultValue: Integer): Integer;
{ Retrieves from Element given attribute as a Single, or a default value. }
function AttributeSingleDef(const AttrName: string; const DefaultValue: Single): Single;
{ Retrieves from Element given attribute as a Float, or a default value. }
function AttributeFloatDef(const AttrName: string; const DefaultValue: Float): Float;
{ Retrieves from Element given attribute as a boolean,
returns a default value if missing or has invalid value. }
function AttributeBooleanDef(const AttrName: string; const DefaultValue: boolean): boolean;
end;
{ This returns the @italic(one and only) child element of this Element.
If given Element has none or more than one child elements,
returns @nil. This is handy for parsing XML in cases when you
know that given element must contain exactly one other element
in correct XML file. }
function DOMGetOneChildElement(const Element: TDOMElement): TDOMElement;
type
EDOMChildElementError = class(Exception);
{ Searches children elements inside Element for element with given
ChildName.
For example
@preformatted(
<level>
<creatures>
...
</creatures>
<items>
...
</items>
</level>
)
If you pass as Element the <level> node, and 'items' as
ChildNode, then the TDOMElement representing <items>
will be returned. If given ChildName will not exist
@italic(or it will exist more than once (yes, that's checked)),
then will return @nil or raise EDOMChildElementError
(depending on RaiseOnError).
@raises(EDOMChildElementError
If child not found or found more than once and RaiseOnError) }
function DOMGetChildElement(const Element: TDOMElement;
const ChildName: string; RaiseOnError: boolean): TDOMElement;
{ This returns the text data contained in this element.
This is suitable if an element is supposed to contain only some text.
It raises an error if an element contains any other element as child.
It concatenates all text data nodes that are direct children
of this element. So if there are no text data nodes, it returns
empty string without raising any error.
AFAIK it's uncommon but
possible to have here more than one text node. Normally, more than one
text nodes occur because they are separated by other child elements,
but we already eliminated this possibility (i.e. we raise error
in this case). Still, if you operated on DOM tree, e.g. deleted
some elements, or inserted some text nodes, then I think it's possible
that you will have more than one text node within this element.
So this procedure should still work OK in this case. }
function DOMGetTextData(const Element: TDOMElement): DOMString;
{ Gets a child of Element named ChildName, and gets text data within
this child.
This is just a shortcut for @code(DOMGetTextData(DOMGetChildElement(Element,
ChildName, true))).
@raises(EDOMChildElementError
If child not found or found more than once and RaiseOnError) }
function DOMGetTextChild(const Element: TDOMElement;
const ChildName: string): string;
type
{ Iterate over all children elements of given XML element.
Without this, typical iteration looks like
@longCode(#
var
Index: Integer;
ChildrenList: TDOMNodeList;
ChildNode: TDOMNode;
ChildElement: TDOMElement;
begin
ChildrenList := Element.ChildNodes;
try
for Index := 0 to ChildrenList.Count - 1 do
begin
ChildNode := ChildrenList.Item[Index];
if ChildNode.NodeType = ELEMENT_NODE then
begin
ChildElement := ChildNode as TDOMElement;
... here goes your code to process ChildElement ...
end;
end;
finally FreeChildNodes(ChildrenList); end;
end;
#)
... which is an easy code, but it becomes tiresome
to write this over and over again, especially
for units that heavily process XML (like X3D XML or Collada readers).
So this class allows you to write instead
@longCode(#
var
I: TXMLElementIterator;
begin
I := TXMLElementIterator.Create(Element);
try
while I.GetNext do
begin
... here goes your code to process I.Current ...
end;
finally FreeAndNil(I) end;
end;
#) }
TXMLElementIterator = class
private
ChildNodes: TDOMNodeList;
ChildIndex: Integer;
FCurrent: TDOMElement;
public
constructor Create(ParentElement: TDOMElement);
destructor Destroy; override;
function GetNext: boolean; virtual;
property Current: TDOMElement read FCurrent;
end;
{ Iterate over children elements of given XML element, that have matching TagName. }
TXMLElementFilteringIterator = class(TXMLElementIterator)
private
FTagName: string;
public
constructor Create(ParentElement: TDOMElement; const TagName: string);
function GetNext: boolean; override;
end;
{ Iterate over all CDATA nodes of given XML element.
Simple usage:
@longCode(#
var
I: TXMLCDataIterator;
begin
I := TXMLCDataIterator.Create(Element);
try
while I.GetNext do
begin
... here goes your code to process I.Current ...
end;
finally FreeAndNil(I) end;
end;
#) }
TXMLCDataIterator = class
private
ChildNodes: TDOMNodeList;
ChildIndex: Integer;
FCurrent: string;
public
constructor Create(ParentElement: TDOMElement);
destructor Destroy; override;
function GetNext: boolean;
property Current: string read FCurrent;
end;
{ If needed, free result of TDOMElement.ChildNodes.
This abstracts FPC DOM unit differences:
@unorderedList(
@item(
For FPC <= 2.2.x, it was needed to call ChildNodes.Release when you're
done with them.)
@item(
For FPC trunk, you do not have to free them at all (since rev 13143),
and their Release method doesn't exist (since rev 13113).)
) }
procedure FreeChildNodes(const ChildNodes: TDOMNodeList);
{ Replacements for standard ReadXMLFile and WriteXMLFile that operate on URLs.
Optionally they can encrypt / decrypt content using BlowFish.
@groupBegin }
procedure URLReadXML(out Doc: TXMLDocument; const URL: String);
procedure URLReadXML(out Doc: TXMLDocument; const URL: String; const BlowFishKeyPhrase: string);
procedure URLWriteXML(Doc: TXMLDocument; const URL: String);
procedure URLWriteXML(Doc: TXMLDocument; const URL: String; const BlowFishKeyPhrase: string);
{ @groupEnd }
implementation
uses Classes, XMLRead, XMLWrite, BlowFish,
CastleDownload, CastleURIUtils, CastleClassUtils;
{ TDOMElementHelper ---------------------------------------------------------- }
function TDOMElementHelper.AttributeString(const AttrName: string; var Value: string): boolean;
var
AttrNode: TDOMNode;
begin
AttrNode := Attributes.GetNamedItem(AttrName);
Result := AttrNode <> nil;
if Result then
begin
Check(AttrNode.NodeType = ATTRIBUTE_NODE,
'All element attributes must have ATTRIBUTE_NODE');
Value := (AttrNode as TDOMAttr).Value;
end;
end;
function TDOMElementHelper.AttributeURL(
const AttrName: string; const BaseUrl: string; var URL: string): boolean;
begin
Result := AttributeString(AttrName, URL);
if Result then
URL := CombineURI(BaseUrl, URL);
end;
function TDOMElementHelper.AttributeCardinal(
const AttrName: string; var Value: Cardinal): boolean;
var
ValueStr: string;
begin
Result := AttributeString(AttrName, ValueStr);
if Result then
Value := StrToInt(ValueStr);
end;
function TDOMElementHelper.AttributeInteger(
const AttrName: string; var Value: Integer): boolean;
var
ValueStr: string;
begin
Result := AttributeString(AttrName, ValueStr);
if Result then
Value := StrToInt(ValueStr);
end;
function TDOMElementHelper.AttributeSingle(
const AttrName: string; var Value: Single): boolean;
var
ValueStr: string;
begin
Result := AttributeString(AttrName, ValueStr);
if Result then
Value := StrToFloat(ValueStr);
end;
function TDOMElementHelper.AttributeFloat(
const AttrName: string; var Value: Float): boolean;
var
ValueStr: string;
begin
Result := AttributeString(AttrName, ValueStr);
if Result then
Value := StrToFloat(ValueStr);
end;
function TDOMElementHelper.AttributeBoolean(
const AttrName: string; var Value: boolean): boolean;
var
ValueStr: string;
begin
Result := AttributeString(AttrName, ValueStr);
if Result then
begin
if AnsiCompareText(ValueStr, 'TRUE') = 0 then
Value := true else
if AnsiCompareText(ValueStr, 'FALSE') = 0 then
Value := false else
Result := false;
end;
end;
function TDOMElementHelper.AttributeString(const AttrName: string): string;
begin
if not AttributeString(AttrName, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing required (string) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeURL(const AttrName: string; const BaseUrl: string): string;
begin
if not AttributeURL(AttrName, BaseUrl, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing required (URL) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeCardinal(const AttrName: string): Cardinal;
begin
if not AttributeCardinal(AttrName, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing required (unsigned integer) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeInteger(const AttrName: string): Integer;
begin
if not AttributeInteger(AttrName, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing required (integer) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeSingle(const AttrName: string): Single;
begin
if not AttributeSingle(AttrName, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing required (float) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeFloat(const AttrName: string): Float;
begin
if not AttributeFloat(AttrName, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing required (float) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeBoolean(const AttrName: string): boolean;
begin
if not AttributeBoolean(AttrName, Result) then
raise EDOMAttributeMissing.CreateFmt('Missing (or has an invalid value) required (boolean) attribute "%s" on element "%s"', [AttrName, TagName]);
end;
function TDOMElementHelper.AttributeStringDef(const AttrName: string; const DefaultValue: string): string;
begin
if not AttributeString(AttrName, Result) then
Result := DefaultValue;
end;
function TDOMElementHelper.AttributeIntegerDef(const AttrName: string; const DefaultValue: Integer): Integer;
begin
if not AttributeInteger(AttrName, Result) then
Result := DefaultValue;
end;
function TDOMElementHelper.AttributeCardinalDef(const AttrName: string; const DefaultValue: Cardinal): Cardinal;
begin
if not AttributeCardinal(AttrName, Result) then
Result := DefaultValue;
end;
function TDOMElementHelper.AttributeSingleDef(const AttrName: string; const DefaultValue: Single): Single;
begin
if not AttributeSingle(AttrName, Result) then
Result := DefaultValue;
end;
function TDOMElementHelper.AttributeFloatDef(const AttrName: string; const DefaultValue: Float): Float;
begin
if not AttributeFloat(AttrName, Result) then
Result := DefaultValue;
end;
function TDOMElementHelper.AttributeBooleanDef(const AttrName: string; const DefaultValue: boolean): boolean;
begin
if not AttributeBoolean(AttrName, Result) then
Result := DefaultValue;
end;
{ globals -------------------------------------------------------------------- }
function DOMGetAttribute(const Element: TDOMElement;
const AttrName: string; var Value: string): boolean;
begin
Result := Element.AttributeString(AttrName, Value);
end;
function DOMGetCardinalAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Cardinal): boolean;
begin
Result := Element.AttributeCardinal(AttrName, Value);
end;
function DOMGetIntegerAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Integer): boolean;
begin
Result := Element.AttributeInteger(AttrName, Value);
end;
function DOMGetSingleAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Single): boolean;
begin
Result := Element.AttributeSingle(AttrName, Value);
end;
function DOMGetFloatAttribute(const Element: TDOMElement;
const AttrName: string; var Value: Float): boolean;
begin
Result := Element.AttributeFloat(AttrName, Value);
end;
function DOMGetBooleanAttribute(const Element: TDOMElement;
const AttrName: string; var Value: boolean): boolean;
begin
Result := Element.AttributeBoolean(AttrName, Value);
end;
function DOMGetOneChildElement(const Element: TDOMElement): TDOMElement;
var
Children: TDOMNodeList;
Node: TDOMNode;
I: Integer;
begin
Result := nil;
Children := Element.ChildNodes;
try
for I := 0 to Integer(Children.Count) - 1 do
begin
Node := Children.Item[I];
if Node.NodeType = ELEMENT_NODE then
begin
if Result = nil then
Result := Node as TDOMElement else
begin
{ More than one element in Children. }
Result := nil;
Exit;
end;
end;
end;
finally FreeChildNodes(Children) end;
end;
function DOMGetChildElement(const Element: TDOMElement;
const ChildName: string; RaiseOnError: boolean): TDOMElement;
var
Children: TDOMNodeList;
Node: TDOMNode;
I: Integer;
begin
Result := nil;
Children := Element.ChildNodes;
try
for I := 0 to Integer(Children.Count) - 1 do
begin
Node := Children.Item[I];
if (Node.NodeType = ELEMENT_NODE) and
((Node as TDOMElement).TagName = ChildName) then
begin
if Result = nil then
Result := TDOMElement(Node) else
begin
if RaiseOnError then
raise EDOMChildElementError.CreateFmt(
'Child "%s" occurs more than once', [ChildName]) else
Exit(nil);
end;
end;
end;
finally FreeChildNodes(Children) end;
if (Result = nil) and RaiseOnError then
raise EDOMChildElementError.CreateFmt(
'Child "%s" not found', [ChildName])
end;
function DOMGetTextData(const Element: TDOMElement): DOMString;
var
Children: TDOMNodeList;
Node: TDOMNode;
I: Integer;
begin
Result := '';
Children := Element.ChildNodes;
try
for I := 0 to Integer(Children.Count) - 1 do
begin
Node := Children.Item[I];
case Node.NodeType of
TEXT_NODE: Result += (Node as TDOMText).Data;
ELEMENT_NODE: raise Exception.CreateFmt(
'Child elements not allowed within element <%s>, but found %s',
[Element.TagName, (Node as TDOMElement).TagName]);
end;
end;
finally FreeChildNodes(Children) end;
end;
function DOMGetTextChild(const Element: TDOMElement;
const ChildName: string): string;
begin
Result := DOMGetTextData(DOMGetChildElement(Element, ChildName, true));
end;
{ TXMLElementIterator -------------------------------------------------------- }
constructor TXMLElementIterator.Create(ParentElement: TDOMElement);
begin
inherited Create;
ChildNodes := ParentElement.ChildNodes;
ChildIndex := -1;
end;
destructor TXMLElementIterator.Destroy;
begin
FreeChildNodes(ChildNodes);
inherited;
end;
function TXMLElementIterator.GetNext: boolean;
var
ChildNode: TDOMNode;
begin
repeat
Inc(ChildIndex);
if ChildIndex >= Integer(ChildNodes.Count) then
begin
Result := false;
Break;
end else
begin
ChildNode := ChildNodes[ChildIndex];
if ChildNode.NodeType = ELEMENT_NODE then
begin
Result := true;
FCurrent := ChildNode as TDOMElement;
Break;
end;
end;
until false;
end;
{ TXMLElementFilteringIterator ----------------------------------------------- }
constructor TXMLElementFilteringIterator.Create(ParentElement: TDOMElement; const TagName: string);
begin
inherited Create(ParentElement);
FTagName := TagName;
end;
function TXMLElementFilteringIterator.GetNext: boolean;
begin
repeat
Result := inherited GetNext;
until (not Result) or (Current.TagName = FTagName);
end;
{ TXMLCDataIterator -------------------------------------------------------- }
constructor TXMLCDataIterator.Create(ParentElement: TDOMElement);
begin
inherited Create;
ChildNodes := ParentElement.ChildNodes;
ChildIndex := -1;
end;
destructor TXMLCDataIterator.Destroy;
begin
FreeChildNodes(ChildNodes);
inherited;
end;
function TXMLCDataIterator.GetNext: boolean;
var
ChildNode: TDOMNode;
begin
repeat
Inc(ChildIndex);
if ChildIndex >= Integer(ChildNodes.Count) then
begin
Result := false;
Break;
end else
begin
ChildNode := ChildNodes[ChildIndex];
if ChildNode.NodeType = CDATA_SECTION_NODE then
begin
Result := true;
FCurrent := (ChildNode as TDOMCDataSection).Data;
Break;
end;
end;
until false;
end;
procedure FreeChildNodes(const ChildNodes: TDOMNodeList);
begin
{$ifdef VER2_0} ChildNodes.Release; {$endif}
{$ifdef VER2_1} ChildNodes.Release; {$endif}
{$ifdef VER2_2} ChildNodes.Release; {$endif}
end;
procedure URLReadXML(out Doc: TXMLDocument; const URL: String; const BlowFishKeyPhrase: string);
var
Stream: TStream;
DecryptStream: TBlowFishDecryptStream;
DecryptedCorrectStream: TStringStream;
L: Integer;
DecryptedContent: string;
begin
Doc := nil; // clean "out" param at start, just like ReadXMLFile
Stream := Download(URL, []);
try
DecryptStream := TBlowFishDecryptStream.Create(BlowFishKeyPhrase, Stream);
try
{ TBlowFishDecryptStream (or maybe encryption?) adds zeros at the end.
Cut them off. }
DecryptedContent := ReadGrowingStreamToString(DecryptStream);
L := Length(DecryptedContent);
while (L > 0) and (DecryptedContent[L] = #0) do
Dec(L);
SetLength(DecryptedContent, L);
DecryptedCorrectStream := TStringStream.Create(DecryptedContent);
try
ReadXMLFile(Doc, DecryptedCorrectStream);
finally FreeAndNil(DecryptedCorrectStream) end;
finally FreeAndNil(DecryptStream) end;
finally FreeAndNil(Stream) end;
end;
procedure URLReadXML(out Doc: TXMLDocument; const URL: String);
var
Stream: TStream;
begin
Doc := nil; // clean "out" param at start, just like ReadXMLFile
Stream := Download(URL, []);
try
ReadXMLFile(Doc, Stream);
finally FreeAndNil(Stream) end;
end;
procedure URLWriteXML(Doc: TXMLDocument; const URL: String; const BlowFishKeyPhrase: string);
var
Stream: TStream;
EncryptStream: TBlowFishEncryptStream;
begin
Stream := URLSaveStream(URL);
try
EncryptStream := TBlowFishEncryptStream.Create(BlowFishKeyPhrase, Stream);
try
WriteXMLFile(Doc, EncryptStream);
finally FreeAndNil(EncryptStream) end;
finally FreeAndNil(Stream) end;
end;
procedure URLWriteXML(Doc: TXMLDocument; const URL: String);
var
Stream: TStream;
begin
Stream := URLSaveStream(URL);
try
WriteXMLFile(Doc, Stream);
finally FreeAndNil(Stream) end;
end;
end.
|