Replace broken Travis CI by GitHub action

[stweil]

No description provided.

[stweil]

The CI currently fails for no obvious reason when running PageConverter.jar to convert an ALTO file (which looks good) to PAGE XML, like it is done manually in this command:

LANG=C.UTF-8 java -jar ../vendor/JPageConverter/PageConverter.jar -source-xml wetzel_reisebegleiter_1901_0021.alto -target-xml out -convert-to LATEST
org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Premature end of file.
	at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:204)
	at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:178)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:400)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1465)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1013)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:605)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:542)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(SchemaParsingConfig.java:640)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(SchemaParsingConfig.java:696)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaDOMParser.parse(SchemaDOMParser.java:530)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument(XSDHandler.java:2227)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.parseSchema(XSDHandler.java:589)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:618)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadGrammar(XMLSchemaLoader.java:577)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadGrammar(XMLSchemaLoader.java:543)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.validation.XMLSchemaFactory.newSchema(XMLSchemaFactory.java:281)
	at java.xml/javax.xml.validation.SchemaFactory.newSchema(SchemaFactory.java:612)
	at org.primaresearch.io.xml.XmlValidator.getSchema(XmlValidator.java:55)
	at org.primaresearch.dla.page.io.xml.XmlPageReader.createMainParser(XmlPageReader.java:82)
	at org.primaresearch.dla.page.io.xml.XmlPageReader.parse(XmlPageReader.java:176)
	at org.primaresearch.dla.page.io.xml.XmlPageReader.read(XmlPageReader.java:130)
	at org.primaresearch.dla.page.io.xml.PageXmlInputOutput.readPage(PageXmlInputOutput.java:212)
	at org.primaresearch.dla.page.converter.PageConverter.run(PageConverter.java:230)
	at org.primaresearch.dla.page.converter.PageConverter.main(PageConverter.java:161)

[kba]

I tried the call directly too but for me it fails because

java.io.IOException: Server returned HTTP response code: 403 for URL: http://www.loc.gov/standards/alto/alto.xsd                                                             

because apparently the LoC is using Cloudflare which does not allow calling with the user agent of PageConverter.jar...

If you have an idea how to get past that, I can investigate further, for now I am stuck.

One guess would be that <?xml version="1.0" encoding="UTF-8"?> might be the reason for failing on the first character of the first line.

[kba]

Otherwise it looks fine, thanks @stweil.

[stweil]

Strange. Why do you see an IOException for an http URL, although the ALTO file uses an https URL?

The error message which I get with "lineNumber: 1; columnNumber: 1" is misleading. The ALTO input is processed and converted to a PAGE XML file which looks correct. So the SAXParseException occurs after the conversion. Nothing changes if I remove line 1 from the ALTO file.

[stweil]

I'll merge this pull request. The PageConverter issue will be handled separately.