Open-XML-SDK
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dotnet
Open document fail when Content_Types records paths with wrong case
Describe the bug
The PresentationDocument.Open will throw the OpenXmlPackageException exception when we open the document which Content_Types records paths with wrong case.
DocumentFormat.OpenXml.Packaging.OpenXmlPackageException:“The document cannot be opened because there is an invalid part with an unexpected content type.
[Part Uri=/ppt/presProps.xml],
[Content Type=application/xml],
[Expected Content Type=application/vnd.openxmlformats-officedocument.presentationml.presProps+xml].”
DocumentFormat.OpenXml.Packaging.OpenXmlPart.Load(DocumentFormat.OpenXml.Packaging.OpenXmlPackage, DocumentFormat.OpenXml.Packaging.OpenXmlPart, System.Uri, string, System.Collections.Generic.Dictionary<System.Uri, DocumentFormat.OpenXml.Packaging.OpenXmlPart>)
DocumentFormat.OpenXml.Packaging.OpenXmlPartContainer.LoadReferencedPartsAndRelationships(DocumentFormat.OpenXml.Packaging.OpenXmlPackage, DocumentFormat.OpenXml.Packaging.OpenXmlPart, DocumentFormat.OpenXml.Packaging.RelationshipCollection, System.Collections.Generic.Dictionary<System.Uri, DocumentFormat.OpenXml.Packaging.OpenXmlPart>)
DocumentFormat.OpenXml.Packaging.OpenXmlPartContainer.LoadReferencedPartsAndRelationships(DocumentFormat.OpenXml.Packaging.OpenXmlPackage, DocumentFormat.OpenXml.Packaging.OpenXmlPart, DocumentFormat.OpenXml.Packaging.RelationshipCollection, System.Collections.Generic.Dictionary<System.Uri, DocumentFormat.OpenXml.Packaging.OpenXmlPart>)
DocumentFormat.OpenXml.Packaging.OpenXmlPackage.Load(System.IO.Packaging.Package)
DocumentFormat.OpenXml.Packaging.PresentationDocument.Open(System.IO.Stream, bool, DocumentFormat.OpenXml.Packaging.OpenSettings)
The [Content_Types].xml records the PartName with wrong case, such as /ppt/presprops.xml what we expect is /ppt/presProps.xml.
And we can open the document with Office PowerPoint, but fail with OpenXMLSDK.
Screenshots
To Reproduce // Please add a self-contained, minimum viable repro of the issue. // If you require external resources, please provide a gist or GitHub repro // An Xunit style test is preferred, but a console application would work too.
Steps to reproduce the behavior:
- Download the test file
- Use the code to open the test file:
PresentationDocument.Open(testFilePath, false)
Observed behavior Throw the exception
Expected behavior The Open XML SDK can open the document file.
Desktop (please complete the following information):
- OS: any
- Office version [e.g. 16.0.15427.20178]
- .NET Target: any
- DocumentFormat.OpenXml Version: 2.19.0
Additional context
Why the Open XML SDK can not open this document? Because the Open XML SDK will use ZipPackage to get the ContentType, see
https://github.com/dotnet/runtime/blob/2d5a9162f6bd9583981d54363d077a04e4efc868/src/libraries/System.IO.Packaging/src/System/IO/Packaging/ZipPackage.cs#L604-L624
But the _overrideDictionary does not ignore case, see
https://github.com/dotnet/runtime/blob/2d5a9162f6bd9583981d54363d077a04e4efc868/src/libraries/System.IO.Packaging/src/System/IO/Packaging/ZipPackage.cs#L694-L699
And it may be fixed in https://github.com/dotnet/Open-XML-SDK/pull/1295
Hello, I believe I just encountered this issue. Is there a workaround based on the linked PR?
The error message is:
DocumentFormat.OpenXml.Packaging.OpenXmlPackageException: The document cannot be opened because there is an invalid part with an unexpected content type.
[Part Uri=/docMetadata/LabelInfo.xml],
[Content Type=application/xml],
[Expected Content Type=application/vnd.ms-office.classificationlabels+xml].
DocumentFormat.OpenXml.Packaging.OpenXmlPackageException:“The document cannot be opened because there is an invalid part with an unexpected content type. [Part Uri=/xl/styles.xml], [Content Type=application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml], [Expected Content Type=application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml].”
