AbstractXmlDocMediaTypeResolver.java 文件源码

protected boolean isDocumentTag(InputStream dataStream, String tagName) throws FactoryConfigurationError {
    try {
        String content = FileUtils.getContentAsString(dataStream);
        if (content != null) {
            content = content.toLowerCase();
            if (content.contains("<html") && content.contains("</html>")) {
                if (tagName.equals("html")) {
                    return true;
                }
            }
            dataStream = new ByteArrayInputStream(content.getBytes());
        }
        OMElement documentElement = getXmlDoc(dataStream);
        String localName = documentElement.getLocalName();
        return localName.equalsIgnoreCase(tagName);
    } catch (Exception e) {
        return false;
    }
}