com.rometools.rome.io.XmlReader can't read compressed data from java.net.URLConnection

[patexoid]

SyndFeed feed = new SyndFeedInput().build(new XmlReader(connection));
Fails if connection.getHeaderField("Content-Encoding") is 'gzip'

Exception

com.rometools.rome.io.ParsingFeedException: Invalid XML: Error on line 1: Content is not allowed in prolog.
       at com.rometools.rome.io.WireFeedInput.build(WireFeedInput.java:236)
       at com.rometools.rome.io.SyndFeedInput.build(SyndFeedInput.java:150)
.....
 Caused by: org.jdom2.input.JDOMParseException: Error on line 1: Content is not allowed in prolog.
       at org.jdom2.input.sax.SAXBuilderEngine.build(SAXBuilderEngine.java:232)
       at org.jdom2.input.sax.SAXBuilderEngine.build(SAXBuilderEngine.java:303)
       at org.jdom2.input.SAXBuilder.build(SAXBuilder.java:1196)
       at com.rometools.rome.io.WireFeedInput.build(WireFeedInput.java:233)
       ... 9 more
 Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
       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:1471)
       at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:978)
       at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:605)
       at java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
       at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:541)
       at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:888)
       at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:824)
       at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
       at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
       at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:635)
       at org.jdom2.input.sax.SAXBuilderEngine.build(SAXBuilderEngine.java:217)
       ... 12 more

[PatrickGotthard]

Hi @patexoid,

the XmlReader works only for simple cases. Please download the feed with a dedicated HTTP library and then use Rome to parse the content. Here are some examples: #276

Regards,
Patrick