我如何将阅读器解析为日历？

Question

我已经尝试通过自定义事件将InputStreamReader返回的日历解析为一个读取器，但是由于icalendar文件的内容，我得到了URISyntaxException。但是我无法修改它，因为我的目的是仅获取iCalendar数据（在线file.ics）并将其解析为带有iCal4j库的日历：https://github.com/ical4j/ical4j。所以我的问题是如何解决或绕过这个问题？

我的代码：

public class AccesHTTP extends AsyncTask<String, String, String> {
    private Controle controle;
    private String urlServ = null;
    public AsyncResponse delegate = null;

    public AccesHTTP(String servaddr) {
        controle = Controle.getInstance(null);
        urlServ = servaddr;
    }

    @Override
    protected String doInBackground(String... strings) {
        // Create a TimeZone
        System.setProperty("net.fortuna.ical4j.timezone.cache.impl", MapTimeZoneCache.class.getName());

        URL url = null;
        try {
            url = new URL(urlServ);
            Reader r = null;
            r = new InputStreamReader(url.openStream(), "ISO-8859-15");
            CalendarBuilder builder = new CalendarBuilder();
            Calendar thisCalendar = builder.build(r);
            controle.refreshEdt(thisCalendar);
        } catch (IOException | ParserException e) {
            e.printStackTrace();
        }

        return "Completed";
    }

    @Override
    protected void onPostExecute(String s){
        Log.d("Return","************ " + s + " ************");
        if(s!=null){
            delegate.processFinish(s);
        };
    }
}

我的icalendar内容格式：

BEGIN:VCALENDAR
BEGIN:VEVENT
ATTENDEE;ROLE=CHAIR:CN=LASTNAME Forename :MAILTO:[email protected]
ATTENDEE;ROLE=REQ-PARTICIPANT:CN=S5A-01_ANG :MAILTO:[email protected]
SUMMARY:- ang
DESCRIPTION:Professeur:LASTNAME Forename \nGroupe:S5A-01_ANG 
DTSTART;TZID=Europe/Paris:20191211T080500
DTEND;TZID=Europe/Paris:20191211T093500
DTSTAMP:20200527T104154
LOCATION:B213
STATUS:CONFIRMED
UID:47468078
END:VEVENT
BEGIN:VEVENT
ATTENDEE;ROLE=CHAIR:CN=LASTNAME Forename :MAILTO:[email protected]
ATTENDEE;ROLE=REQ-PARTICIPANT:CN=S5A-01_ANG :MAILTO:[email protected]
...
END:VEVENT
END:VCALENDAR

错误代码：

java.net.URISyntaxException: Illegal character in scheme name at index 2: CN=LASTNAME Forename :MAILTO:[email protected]
at java.net.URI$Parser.fail(URI.java:2875)
at java.net.URI$Parser.checkChars(URI.java:3048)
at java.net.URI$Parser.parse(URI.java:3075)
at java.net.URI.<init>(URI.java:583)
at net.fortuna.ical4j.util.Uris.create(Uris.java:121)
at net.fortuna.ical4j.model.property.Attendee.setValue(Attendee.java:109)
at net.fortuna.ical4j.model.property.Attendee.<init>(Attendee.java:85)
at net.fortuna.ical4j.model.property.Attendee$Factory.createProperty(Attendee.java:175)
at net.fortuna.ical4j.model.PropertyBuilder.build(PropertyBuilder.java:48)
at net.fortuna.ical4j.data.DefaultContentHandler.endProperty(DefaultContentHandler.java:123)
at net.fortuna.ical4j.data.CalendarParserImpl$PropertyParser.parse(CalendarParserImpl.java:292)
at net.fortuna.ical4j.data.CalendarParserImpl$PropertyParser.access$1100(CalendarParserImpl.java:224)
at net.fortuna.ical4j.data.CalendarParserImpl$PropertyListParser.parse(CalendarParserImpl.java:211)
at net.fortuna.ical4j.data.CalendarParserImpl$ComponentParser.parse(CalendarParserImpl.java:427)
at net.fortuna.ical4j.data.CalendarParserImpl$ComponentParser.access$900(CalendarParserImpl.java:404)
at net.fortuna.ical4j.data.CalendarParserImpl$PropertyListParser.parse(CalendarParserImpl.java:209)
at net.fortuna.ical4j.data.CalendarParserImpl.parseCalendar(CalendarParserImpl.java:115)
at net.fortuna.ical4j.data.CalendarParserImpl.parseCalendarList(CalendarParserImpl.java:180)
at net.fortuna.ical4j.data.CalendarParserImpl.parse(CalendarParserImpl.java:149)
... 10 more

Answer 1

iCalendar数据中存在语法错误。

分号必须位于ROLE参数之后，而不是冒号之后。例如：

不正确：ATTENDEE;ROLE=CHAIR:CN=LASTNAME Forename :MAILTO:[email protected]正确：ATTENDEE;ROLE=CHAIR;CN=LASTNAME Forename :MAILTO:[email protected]