// Deserialize properties part. private void ParseCorePropertyPart(PackagePart part) { Stream stream = part.GetStream(FileMode.Open, FileAccess.Read); // Create a reader that uses _nameTable so as to use the set of tag literals // in effect as a set of atomic identifiers. XmlTextReader reader = new XmlTextReader(stream, _nameTable); //Prohibit DTD from the markup as per the OPC spec reader.ProhibitDtd = true; //This method expects the reader to be in ReadState.Initial. //It will make the first read call. PackagingUtilities.PerformInitailReadAndVerifyEncoding(reader); //Note: After the previous method call the reader should be at the first tag in the markup. //MoveToContent - Skips over the following - ProcessingInstruction, DocumentType, Comment, Whitespace, or SignificantWhitespace //If the reader is currently at a content node then this function call is a no-op if (reader.MoveToContent() != XmlNodeType.Element || (object)reader.NamespaceURI != PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.PackageCorePropertiesNamespace) || (object)reader.LocalName != PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.CoreProperties)) { throw new XmlException(SR.Get(SRID.CorePropertiesElementExpected), null, reader.LineNumber, reader.LinePosition); } // The schema is closed and defines no attributes on the root element. if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) != 0) { throw new XmlException(SR.Get(SRID.PropertyWrongNumbOfAttribsDefinedOn, reader.Name), null, reader.LineNumber, reader.LinePosition); } // Iterate through property elements until EOF. Note the proper closing of all // open tags is checked by the reader itself. // This loop deals only with depth-1 start tags. Handling of element content // is delegated to dedicated functions. int attributesCount; while (reader.Read() && reader.MoveToContent() != XmlNodeType.None) { // Ignore end-tags. We check element errors on opening tags. if (reader.NodeType == XmlNodeType.EndElement) { continue; } // Any content markup that is not an element here is unexpected. if (reader.NodeType != XmlNodeType.Element) { throw new XmlException(SR.Get(SRID.PropertyStartTagExpected), null, reader.LineNumber, reader.LinePosition); } // Any element below the root should open at level 1 exclusively. if (reader.Depth != 1) { throw new XmlException(SR.Get(SRID.NoStructuredContentInsideProperties), null, reader.LineNumber, reader.LinePosition); } attributesCount = PackagingUtilities.GetNonXmlnsAttributeCount(reader); // Property elements can occur in any order (xsd:all). object localName = reader.LocalName; PackageXmlEnum xmlStringIndex = PackageXmlStringTable.GetEnumOf(localName); String valueType = PackageXmlStringTable.GetValueType(xmlStringIndex); if (Array.IndexOf(_validProperties, xmlStringIndex) == -1) // An unexpected element is an error. { throw new XmlException( SR.Get(SRID.InvalidPropertyNameInCorePropertiesPart, reader.LocalName), null, reader.LineNumber, reader.LinePosition); } // Any element not in the valid core properties namespace is unexpected. // The following is an object comparison, not a string comparison. if ((object)reader.NamespaceURI != PackageXmlStringTable.GetXmlStringAsObject(PackageXmlStringTable.GetXmlNamespace(xmlStringIndex))) { throw new XmlException(SR.Get(SRID.UnknownNamespaceInCorePropertiesPart), null, reader.LineNumber, reader.LinePosition); } if (String.CompareOrdinal(valueType, "String") == 0) { // The schema is closed and defines no attributes on this type of element. if (attributesCount != 0) { throw new XmlException(SR.Get(SRID.PropertyWrongNumbOfAttribsDefinedOn, reader.Name), null, reader.LineNumber, reader.LinePosition); } RecordNewBinding(xmlStringIndex, GetStringData(reader), true /*initializing*/, reader); } else if (String.CompareOrdinal(valueType, "DateTime") == 0) { int allowedAttributeCount = (object)reader.NamespaceURI == PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.DublinCoreTermsNamespace) ? 1 : 0; // The schema is closed and defines no attributes on this type of element. if (attributesCount != allowedAttributeCount) { throw new XmlException(SR.Get(SRID.PropertyWrongNumbOfAttribsDefinedOn, reader.Name), null, reader.LineNumber, reader.LinePosition); } if (allowedAttributeCount != 0) { ValidateXsiType(reader, PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.DublinCoreTermsNamespace), _w3cdtf); } RecordNewBinding(xmlStringIndex, GetDateData(reader), true /*initializing*/, reader); } else // An unexpected element is an error. { Invariant.Assert(false, "Unknown value type for properties"); } } }
/// <summary> /// Parse PackageRelationship Stream /// </summary> /// <param name="part">relationship part</param> /// <exception cref="XmlException">Thrown if XML is malformed</exception> private void ParseRelationshipPart(PackagePart part) { //We can safely open the stream as FileAccess.Read, as this code //should only be invoked if the Package has been opened in Read or ReadWrite mode. Debug.Assert(_package.FileOpenAccess == FileAccess.Read || _package.FileOpenAccess == FileAccess.ReadWrite, "This method should only be called when FileAccess is Read or ReadWrite"); using (Stream s = part.GetStream(FileMode.Open, FileAccess.Read)) { // load from the relationship part associated with the given part using (XmlTextReader baseReader = new XmlTextReader(s)) { baseReader.WhitespaceHandling = WhitespaceHandling.None; //Prohibit DTD from the markup as per the OPC spec baseReader.ProhibitDtd = true; using (XmlCompatibilityReader reader = new XmlCompatibilityReader(baseReader, RelationshipKnownNamespaces)) { //This method expects the reader to be in ReadState.Initial. //It will make the first read call. PackagingUtilities.PerformInitailReadAndVerifyEncoding(baseReader); //Note: After the previous method call the reader should be at the first tag in the markup. //MoveToContent - Skips over the following - ProcessingInstruction, DocumentType, Comment, Whitespace, or SignificantWhitespace //If the reader is currently at a content node then this function call is a no-op reader.MoveToContent(); // look for our tag and namespace pair - throw if other elements are encountered // Make sure that the current node read is an Element if (reader.NodeType == XmlNodeType.Element && (reader.Depth == 0) && (String.CompareOrdinal(RelationshipsTagName, reader.LocalName) == 0) && (String.CompareOrdinal(PackagingUtilities.RelationshipNamespaceUri, reader.NamespaceURI) == 0)) { ThrowIfXmlBaseAttributeIsPresent(reader); //There should be a namespace Attribute present at this level. //Also any other attribute on the <Relationships> tag is an error including xml: and xsi: attributes if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) > 0) { throw new XmlException(SR.Get(SRID.RelationshipsTagHasExtraAttributes), null, reader.LineNumber, reader.LinePosition); } // start tag encountered for Relationships // now parse individual Relationship tags while (reader.Read()) { //Skips over the following - ProcessingInstruction, DocumentType, Comment, Whitespace, or SignificantWhitespace //If the reader is currently at a content node then this function call is a no-op reader.MoveToContent(); //If MoveToContent() takes us to the end of the content if (reader.NodeType == XmlNodeType.None) { continue; } if (reader.NodeType == XmlNodeType.Element && (reader.Depth == 1) && (String.CompareOrdinal(RelationshipTagName, reader.LocalName) == 0) && (String.CompareOrdinal(PackagingUtilities.RelationshipNamespaceUri, reader.NamespaceURI) == 0)) { ThrowIfXmlBaseAttributeIsPresent(reader); int expectedAttributesCount = 3; string targetModeAttributeValue = reader.GetAttribute(TargetModeAttributeName); if (targetModeAttributeValue != null) { expectedAttributesCount++; } //check if there are expected number of attributes. //Also any other attribute on the <Relationship> tag is an error including xml: and xsi: attributes if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) == expectedAttributesCount) { ProcessRelationshipAttributes(reader); //Skip the EndElement for Relationship if (!reader.IsEmptyElement) { ProcessEndElementForRelationshipTag(reader); } } else { throw new XmlException(SR.Get(SRID.RelationshipTagDoesntMatchSchema), null, reader.LineNumber, reader.LinePosition); } } else if (!(String.CompareOrdinal(RelationshipsTagName, reader.LocalName) == 0 && (reader.NodeType == XmlNodeType.EndElement))) { throw new XmlException(SR.Get(SRID.UnknownTagEncountered), null, reader.LineNumber, reader.LinePosition); } } } else { throw new XmlException(SR.Get(SRID.ExpectedRelationshipsElementTag), null, reader.LineNumber, reader.LinePosition); } } } } }