解析谷歌日历时出现 SAX 解析异常

Question

我正在使用 GDATA API 来解析谷歌日历。日历嵌入在网站中：

http://regreformtracker.aba.com/p/dodd-frank-calendar.html

我从上述网站中使用的 iframe src 获得了日历 URL：

https://www.google.com/calendar/b/0/embed?showTitle=0&height=600&wkst=1&bgcolor=%23FFFFFF&src=regreform%40aba.com&color=%23182C57&src=7vccf8rlid30a0v4m1004atiqg%40group.calendar.google.com&color=%23125A12&src=3rpabc5qjf34l49ho337qh9m04%40group.calendar.google.com&color=%23691426&ctz=America%2FNew_York

我正在使用下面提到的sn-p：

 URL feedURL = new URL("https://www.google.com/calendar/b/0/embed?showTitle=0&height=600&wkst=1&bgcolor=%23FFFFFF&src=regreform%40aba.com&color=%23182C57&src=7vccf8rlid30a0v4m1004atiqg%40group.calendar.google.com&color=%23125A12&src=3rpabc5qjf34l49ho337qh9m04%40group.calendar.google.com&color=%23691426&ctz=America%2FNew_York");
 CalendarService service = new CalendarService("TestCalendarFeed");
 CalendarEventFeed resultFeed = service.getFeed(feedURL , CalendarEventFeed.class);

我得到了 SAXParseException，下面是相同的堆栈跟踪：

[Fatal Error] strict.dtd:81:5: The declaration for the entity "ContentType" must end with '>'.
Oct 13, 2014 2:09:22 PM com.google.gdata.util.LogUtils logException
WARNING: org.xml.sax.SAXParseExceptionpublicId: -//W3C//DTD HTML 4.01//EN; systemId: http://www.w3.org/TR/html4/strict.dtd; lineNumber: 81; columnNumber: 5; The declaration for the entity "ContentType" must end with '>'.
Message: The declaration for the entity "ContentType" must end with '>'.

    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1236)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
    at org.xml.sax.helpers.ParserAdapter.parse(ParserAdapter.java:430)
    at com.google.gdata.util.XmlParser.parse(Unknown Source)
    at com.google.gdata.util.XmlParser.parse(Unknown Source)
    at com.google.gdata.data.BaseFeed.parseAtom(Unknown Source)
    at com.google.gdata.data.BaseFeed.readFeed(Unknown Source)
    at com.google.gdata.client.Service.getFeed(Unknown Source)
    at com.google.gdata.client.GoogleService.getFeed(Unknown Source)
    at com.google.gdata.client.Service.getFeed(Unknown Source)
    at sample.calendar.TestCalendarFeed.printAllEvents(TestCalendarFeed.java:116)
    at sample.calendar.TestCalendarFeed.main(TestCalendarFeed.java:472)
The server had a problem handling your request.
com.google.gdata.util.ParseException: org.xml.sax.SAXParseExceptionpublicId: -//W3C//DTD HTML 4.01//EN; systemId: http://www.w3.org/TR/html4/strict.dtd; lineNumber: 81; columnNumber: 5; The declaration for the entity "ContentType" must end with '>'.
    at com.google.gdata.util.XmlParser.parse(Unknown Source)
    at com.google.gdata.util.XmlParser.parse(Unknown Source)
    at com.google.gdata.data.BaseFeed.parseAtom(Unknown Source)
    at com.google.gdata.data.BaseFeed.readFeed(Unknown Source)
    at com.google.gdata.client.Service.getFeed(Unknown Source)
    at com.google.gdata.client.GoogleService.getFeed(Unknown Source)
    at com.google.gdata.client.Service.getFeed(Unknown Source)
    at sample.calendar.TestCalendarFeed.printAllEvents(TestCalendarFeed.java:116)
    at sample.calendar.TestCalendarFeed.main(TestCalendarFeed.java:472)
Caused by: org.xml.sax.SAXParseExceptionpublicId: -//W3C//DTD HTML 4.01//EN; systemId: http://www.w3.org/TR/html4/strict.dtd; lineNumber: 81; columnNumber: 5; The declaration for the entity "ContentType" must end with '>'.
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1236)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
    at org.xml.sax.helpers.ParserAdapter.parse(ParserAdapter.java:430)
    ... 9 more

我不确定是什么错误，请您检查并告诉我哪里出错了？

我尝试使用其他日历（例如我的私人日历）来检查日历 URL 是否有问题，但即便如此我也遇到了同样的问题。

我也尝试使用 CalendarFeed 类而不是 CalendarEventFeed，但我仍然遇到同样的问题。

Answer 1

您的提要网址未指向 GData 内容。 https://www.google.com/calendar/b/0/embed?showTitle=0&height=600&wkst=1&bgcolor=%23FFFFFF&src=regreform%40aba.com&color=%23182C57&src=7vccf8rlid30a0v4m1004atiqg%40group.calendar.google.com&color=%23125A12&src=3rpabc5qjf34l49ho337qh9m04%40group.calendar.google.com&color=%23691426&ctz=America%2FNew_York 是一个 html 网页而不是 xml 提要。无论如何，GData 已被弃用，不应使用（将于今年 11 月关闭）。尝试通过 API v3 (https://developers.google.com/google-apps/calendar) 阅读此日历。