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rdeltourrdeltour
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feat: check that the manifest is not self-referencing
This commit adds a new check, reported as `OPF-099` (error), to verify that the package document `manifest` does not include an `item` element that refers to the package document itself. This statement was apparently not checked by EPUBCheck previously. Worse, the code was entering an infinite loop, as the package document checker was creating a new checker for itself, recursively. Fix #1453
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‎src/main/java/com/adobe/epubcheck/messages/DefaultSeverities.java‎

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@@ -293,6 +293,7 @@ private void initialize()
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severities.put(MessageId.OPF_096b, Severity.USAGE);
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severities.put(MessageId.OPF_097, Severity.USAGE);
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severities.put(MessageId.OPF_098, Severity.ERROR);
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severities.put(MessageId.OPF_099, Severity.ERROR);
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// PKG
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severities.put(MessageId.PKG_001, Severity.WARNING);

‎src/main/java/com/adobe/epubcheck/messages/MessageId.java‎

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@@ -287,6 +287,7 @@ public enum MessageId implements Comparable<MessageId>
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OPF_096b("OPF-096b"),
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OPF_097("OPF-097"),
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OPF_098("OPF-098"),
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OPF_099("OPF-099"),
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// Messages relating to the entire package
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PKG_001("PKG-001"),

‎src/main/java/com/adobe/epubcheck/opf/OPFChecker.java‎

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@@ -35,6 +35,7 @@
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import org.w3c.epubcheck.core.Checker;
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import org.w3c.epubcheck.core.CheckerFactory;
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import org.w3c.epubcheck.core.references.ResourceReferencesChecker;
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import org.w3c.epubcheck.util.url.URLUtils;
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import com.adobe.epubcheck.api.EPUBLocation;
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import com.adobe.epubcheck.api.EPUBProfile;
@@ -215,6 +216,11 @@ protected boolean checkContent()
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// FIXME 2022 check duplicates at build time (in OPFHandler)
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report.message(MessageId.OPF_074, item.getLocation(), item.getPath());
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}
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// check that the manifest does not include the package document itself
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else if (item.getURL().equals(context.url))
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{
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report.message(MessageId.OPF_099, item.getLocation());
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}
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else
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{
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checkItem(item, opfHandler);
@@ -361,6 +367,12 @@ protected void checkItemContent(OPFItem item)
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{
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return;
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}
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// Abort if the item is this package document
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// (this is disallowed, and reported elsewhere)
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if (URLUtils.docURL(item.getURL()).equals(context.url))
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{
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return;
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}
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// Create a new validation context for the OPF item
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// FIXME 2022 set context OPFItem here
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// (instead of from XRefChecker in the builder code)

‎src/main/resources/com/adobe/epubcheck/messages/MessageBundle.properties‎

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@@ -215,6 +215,7 @@ OPF_096=Non-linear content must be reachable, but found no hyperlink to "%1$s".
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OPF_096b=No hyperlink was found to non-linear document "%1$s", please check that it can be reached from scripted content.
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OPF_097=Resource "%1$s" is listed in the manifest, but no reference to it was found in content documents.
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OPF_098=The "href" attribute must reference resources, not elements in the package document, but found URL "%1$s".
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OPF_099=The manifest must not list the package document.
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#Package
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PKG_001=Validating the EPUB against version %1$s but detected version %2$s.

‎src/test/resources/epub3/05-package-document/files/manifest-self-referencing-error.opf‎

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@@ -0,0 +1,17 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<package xmlns="http://www.idpf.org/2007/opf" version="3.0" xml:lang="en" unique-identifier="q">
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<metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
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<dc:title id="title">Minimal EPUB 3.0</dc:title>
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<dc:language>en</dc:language>
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<dc:identifier id="q">NOID</dc:identifier>
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<meta property="dcterms:modified">2017-06-14T00:00:01Z</meta>
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</metadata>
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<manifest>
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<item id="self" href="./manifest-self-referencing-error.opf" media-type="application/oebps-package+xml"/>
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<item id="content_001" href="content_001.xhtml" media-type="application/xhtml+xml"/>
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<item id="nav" href="nav.xhtml" media-type="application/xhtml+xml" properties="nav"/>
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</manifest>
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<spine>
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<itemref idref="content_001"/>
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</spine>
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</package>

‎src/test/resources/epub3/05-package-document/files/manifest-self-referencing-error/EPUB/content_001.xhtml‎

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<!DOCTYPE html>
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<html xmlns:epub="http://www.idpf.org/2007/ops" xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta charset="utf-8"/>
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<title>Minimal EPUB</title>
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</head>
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<body>
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<h1>Loomings</h1>
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<p>Call me Ishmael.</p>
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</body>
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</html>

‎src/test/resources/epub3/05-package-document/files/manifest-self-referencing-error/EPUB/nav.xhtml‎

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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" xml:lang="en" lang="en">
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<head>
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<meta charset="utf-8"/>
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<title>Minimal Nav</title>
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</head>
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<body>
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<nav epub:type="toc">
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<ol>
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<li><a href="content_001.xhtml">content 001</a></li>
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</ol>
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</nav>
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</body>
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</html>

‎src/test/resources/epub3/05-package-document/files/manifest-self-referencing-error/EPUB/package.opf‎

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<?xml version="1.0" encoding="UTF-8"?>
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<package xmlns="http://www.idpf.org/2007/opf" version="3.0" xml:lang="en" unique-identifier="q">
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<metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
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<dc:title id="title">Minimal EPUB 3.0</dc:title>
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<dc:language>en</dc:language>
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<dc:identifier id="q">NOID</dc:identifier>
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<meta property="dcterms:modified">2017-06-14T00:00:01Z</meta>
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</metadata>
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<manifest>
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<item id="self" href="./package.opf" media-type="application/oebps-package+xml"/>
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<item id="content_001" href="content_001.xhtml" media-type="application/xhtml+xml"/>
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<item id="nav" href="nav.xhtml" media-type="application/xhtml+xml" properties="nav"/>
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</manifest>
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<spine>
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<itemref idref="content_001"/>
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</spine>
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</package>

‎src/test/resources/epub3/05-package-document/files/manifest-self-referencing-error/META-INF/container.xml‎

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<?xml version="1.0" encoding="UTF-8" ?>
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<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
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<rootfiles>
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<rootfile full-path="EPUB/package.opf" media-type="application/oebps-package+xml"/>
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</rootfiles>
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</container>

‎src/test/resources/epub3/05-package-document/files/manifest-self-referencing-error/mimetype‎

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@@ -0,0 +1 @@
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application/epub+zip

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