1+ /*
2+ * eXist-db Open Source Native XML Database
3+ * Copyright (C) 2001 The eXist-db Authors
4+ *
5+ 6+ * http://www.exist-db.org
7+ *
8+ * This library is free software; you can redistribute it and/or
9+ * modify it under the terms of the GNU Lesser General Public
10+ * License as published by the Free Software Foundation; either
11+ * version 2.1 of the License, or (at your option) any later version.
12+ *
13+ * This library is distributed in the hope that it will be useful,
14+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
15+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16+ * Lesser General Public License for more details.
17+ *
18+ * You should have received a copy of the GNU Lesser General Public
19+ * License along with this library; if not, write to the Free Software
20+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21+ */
22+
23+ package org .exist .xquery .functions .fn .transform ;
24+
25+ import org .exist .dom .persistent .NodeProxy ;
26+ import org .exist .security .PermissionDeniedException ;
27+ import org .exist .xmldb .XmldbURI ;
28+ import org .exist .xquery .ErrorCodes ;
29+ import org .exist .xquery .Expression ;
30+ import org .exist .xquery .XPathException ;
31+ import org .exist .xquery .XQueryContext ;
32+ import org .exist .xquery .util .DocUtils ;
33+ import org .exist .xquery .value .AnyURIValue ;
34+ import org .exist .xquery .value .Sequence ;
35+ import org .exist .xquery .value .Type ;
36+ import org .w3c .dom .Node ;
37+
38+ import javax .xml .transform .Source ;
39+ import javax .xml .transform .TransformerException ;
40+ import javax .xml .transform .URIResolver ;
41+ import javax .xml .transform .dom .DOMSource ;
42+ import java .net .URI ;
43+ import java .net .URISyntaxException ;
44+
45+ public class URIResolution {
46+
47+ /**
48+ * URI resolution, the core should be the same as for fn:resolve-uri
49+ * @param relative URI to resolve
50+ * @param base to resolve against
51+ * @return resolved URI
52+ * @throws URISyntaxException if resolution is not possible
53+ */
54+ static AnyURIValue resolveURI (final AnyURIValue relative , final AnyURIValue base ) throws URISyntaxException , XPathException {
55+ var relativeURI = new URI (relative .getStringValue ());
56+ if (relativeURI .isAbsolute ()) {
57+ return relative ;
58+ }
59+ var baseURI = new URI (base .getStringValue () );
60+ if (!baseURI .isAbsolute ()) {
61+ return relative ;
62+ }
63+ try {
64+ var xBase = XmldbURI .xmldbUriFor (baseURI );
65+ var resolved = xBase .getURI ().resolve (relativeURI );
66+ return new AnyURIValue (XmldbURI .XMLDB_URI_PREFIX + resolved );
67+ } catch (URISyntaxException e ) {
68+ return new AnyURIValue (baseURI .resolve (relativeURI ));
69+ }
70+ }
71+
72+ public static class CompileTimeURIResolver implements URIResolver {
73+
74+ private final XQueryContext xQueryContext ;
75+ private final Expression containingExpression ;
76+
77+ public CompileTimeURIResolver (XQueryContext xQueryContext , Expression containingExpression ) {
78+ this .xQueryContext = xQueryContext ;
79+ this .containingExpression = containingExpression ;
80+ }
81+
82+ @ Override
83+ public Source resolve (final String href , final String base ) throws TransformerException {
84+
85+ try {
86+ final AnyURIValue baseURI = new AnyURIValue (base );
87+ final AnyURIValue hrefURI = new AnyURIValue (href );
88+ var resolved = resolveURI (hrefURI , baseURI );
89+ return resolveDocument (resolved .getStringValue ());
90+ } catch (URISyntaxException e ) {
91+ throw new TransformerException (
92+ "Failed to resolve " + href + " against " + base , e );
93+ } catch (XPathException e ) {
94+ throw new TransformerException (
95+ "Failed to find document as result of resolving " + href + " against " + base , e );
96+ }
97+ }
98+
99+ protected Source resolveDocument (final String location ) throws XPathException {
100+ return URIResolution .resolveDocument (location , xQueryContext , containingExpression );
101+ }
102+ }
103+
104+ /**
105+ * Resolve an absolute document location, stylesheet or included source
106+ *
107+ * @param location of the stylesheet
108+ * @return the resolved stylesheet as a source
109+ * @throws org.exist.xquery.XPathException if the item does not exist, or is not a document
110+ */
111+ static Source resolveDocument (final String location , final XQueryContext xQueryContext , Expression containingExpression ) throws XPathException {
112+
113+ final Sequence document ;
114+ try {
115+ document = DocUtils .getDocument (xQueryContext , location );
116+ } catch (final PermissionDeniedException e ) {
117+ throw new XPathException (containingExpression , ErrorCodes .FODC0002 ,
118+ "Can not access '" + location + "'" + e .getMessage ());
119+ }
120+ if (document == null || document .isEmpty ()) {
121+ throw new XPathException (containingExpression , ErrorCodes .FODC0002 ,
122+ "No document found at location '" + location );
123+ }
124+ if (document .hasOne () && Type .subTypeOf (document .getItemType (), Type .NODE )) {
125+ if (document instanceof NodeProxy proxy ) {
126+ return new DOMSource (proxy .getNode ());
127+ }
128+ else if (document .itemAt (0 ) instanceof Node node ) {
129+ return new DOMSource (node );
130+ }
131+ }
132+ throw new XPathException (containingExpression , ErrorCodes .FODC0002 ,
133+ "Location '" + location + "' returns an item which is not a document node" );
134+ }
135+ }
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