关于c#：从CalDAV获取用户的日历列表

Getting User's List of Calendars from CalDAV

我正在尝试从CalDAV服务器获取当前用户拥有的日历列表。

我能够通过以下请求使用我们的初始测试帐户获取此信息：

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PROPFIND /calendars/users/test/
<propfind xmlns='DAV:'>

</propfind>

结果是带有多个<response>元素的<multistatus>元素。如果我提取resourcetype是日历的元素，则会得到我的日历列表。

但是，当我们添加其他用户时，这会产生" Not Found "错误，因此我改用" principal-match "请求来获取当前用户的" calendar-home-set" "路径。

该路径类似于/ d817aaec-7d24-5b38-bc2f-6369da72cdd9 /。因此，我使用此路径尝试了上述请求。现在，结果是一个只有一个<response>元素的<multistatus>元素。它不包含任何日历。第一个响应与我原始请求中的第一个响应完全相同。

我一生都无法找出神奇的调味料，这将使我在所有情况下都能获得用户日历的列表。

编辑：

这是我的一些代码。我最初尝试的" / calendars / users / test / " URL是从GetRequestAddress()返回的。我使用principal-match获取日历路径的第二种情况是使用CalendarHomeSet(均在下面显示)。

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Headers["Depth"] ="1";
//XElement xmlResult = UploadXml(GetRequestAddress(), // Alternatively, CalendarHomeSet
method: CalDavMethod.PropertyFind,
xml: XDocument.Parse("<propfind xmlns='DAV:'>" +
"" +
"</propfind>").Root);

private string GetRequestAddress(string calendarHRef = null, string resource = null)
{
string path = calendarHRef;
if (String.IsNullOrWhiteSpace(path))
path = String.Format("/calendars/users/{0}/", UserName);
if (!String.IsNullOrWhiteSpace(resource))
path = Path.Combine(path, resource);
return path;
}

/// <summary>
/// Gets/sets the path to the parent folder of any calendar subfolders
/// owned by the current user.
/// </summary>
public string CalendarHomeSet
{
get
{
if (calendarHomeSet == null)
{
Headers["Depth"] ="0";

XElement xmlResult = UploadXml(String.Format("/principals/users/{0}/", UserName),
method:"REPORT",
xml: XDocument.Parse(XmlHeader +
"<D:principal-match xmlns:D="DAV:">" +
"<D:self/>" +
"<D:prop>" +
"<C:calendar-home-set xmlns:C="urn:ietf:params:xml:ns:caldav"/>" +
"</D:prop>" +
"</D:principal-match>").Root);
//
XElement el = xmlResult.Descendants(CalDavXmlns +"calendar-home-set").FirstOrDefault();
if (el != null)
{
calendarHomeSet = (string)el;
if (!calendarHomeSet.EndsWith("/"))
calendarHomeSet += '/';
}
}
return calendarHomeSet;
}

set
{
calendarHomeSet = value;
}
}

private string calendarHomeSet = null;

第二编辑：

以下是有关我的请求和响应的确切内容的更多详细信息。在第一个中，请注意结果包括一个集合，然后是两个日历集合。

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PROPFIND /calendars/users/test/

<propfind xmlns="DAV:">

</propfind>

响应：

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<multistatus xmlns="DAV:">
<response>
<href>/calendars/users/test/</href>
<propstat>
<prop>
<getetag>"4293-1000-4FFC9A16"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<displayname>Test User</displayname>
<getcontenttype>httpd/unix-directory</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<collection />
</resourcetype>
<getcontentlength />
<getlastmodified>Tue, 10 Jul 2012 21:09:42 GMT</getlastmodified>
<creationdate>2012-07-10T21:09:42Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">CalendarHomeFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
<response>
<href>/calendars/users/test/calendar/</href>
<propstat>
<prop>
<getetag>"42DB-1000-50108ABC"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<calendar-order xmlns="http://apple.com/ns/ical/">1</calendar-order>
<displayname>calendar</displayname>
<calendar-color xmlns="http://apple.com/ns/ical/">#F64F00FF</calendar-color>
<getctag xmlns="http://calendarserver.org/ns/">2012-07-26 00:09:32.361284</getctag>
<getcontenttype>httpd/unix-directory</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<collection />
<calendar xmlns="urn:ietf:params:xml:ns:caldav" />
</resourcetype>
<getcontentlength />
<schedule-calendar-transp xmlns="urn:ietf:params:xml:ns:caldav">
<opaque />
</schedule-calendar-transp>
<getlastmodified>Thu, 26 Jul 2012 00:09:32 GMT</getlastmodified>
<creationdate>2012-07-26T00:09:32Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">CalDAVFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
<response>
<href>/calendars/users/test/8C1F393E-04E8-428A-819A-933C3A9338AD/</href>
<propstat>
<prop>
<getetag>"43AA-1000-50079D1C"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<calendar-order xmlns="http://apple.com/ns/ical/">0</calendar-order>
<displayname>Jon Wood Calendar</displayname>
<calendar-color xmlns="http://apple.com/ns/ical/">#711a76</calendar-color>
<getctag xmlns="http://calendarserver.org/ns/">2012-07-19 05:37:32.673835</getctag>
<getcontenttype>httpd/unix-directory</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<collection />
<calendar xmlns="urn:ietf:params:xml:ns:caldav" />
</resourcetype>
<getcontentlength />
<schedule-calendar-transp xmlns="urn:ietf:params:xml:ns:caldav">
<transparent />
</schedule-calendar-transp>
<getlastmodified>Thu, 19 Jul 2012 05:37:32 GMT</getlastmodified>
<creationdate>2012-07-19T05:37:32Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">CalDAVFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
<response>
<href>/calendars/users/test/outbox/</href>
<propstat>
<prop>
<getetag>"D4E-1000-4FFB15AF"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<displayname>outbox</displayname>
<getctag xmlns="http://calendarserver.org/ns/">2012-07-09 17:32:31.950308</getctag>
<getcontenttype>httpd/unix-directory</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<collection />
<schedule-outbox xmlns="urn:ietf:params:xml:ns:caldav" />
</resourcetype>
<getcontentlength />
<getlastmodified>Mon, 09 Jul 2012 17:32:31 GMT</getlastmodified>
<creationdate>2012-07-09T17:32:31Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">ScheduleOutboxFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
<response>
<href>/calendars/users/test/freebusy</href>
<propstat>
<prop>
<getetag>"D7D-0-4FFC3F7C"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<displayname>freebusy</displayname>
<getcontenttype>text/plain</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<free-busy-url xmlns="http://calendarserver.org/ns/" />
</resourcetype>
<getcontentlength>0</getcontentlength>
<getlastmodified>Tue, 10 Jul 2012 14:43:08 GMT</getlastmodified>
<creationdate>2012-07-10T14:43:08Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">FreeBusyURLFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
<response>
<href>/calendars/users/test/inbox/</href>
<propstat>
<prop>
<getetag>"42FB-1000-4FF21C60"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<displayname>inbox</displayname>
<getctag xmlns="http://calendarserver.org/ns/">2012-07-02 22:10:40.527683</getctag>
<getcontenttype>httpd/unix-directory</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<collection />
<schedule-inbox xmlns="urn:ietf:params:xml:ns:caldav" />
</resourcetype>
<getcontentlength />
<schedule-default-calendar-URL xmlns="urn:ietf:params:xml:ns:caldav">
<href xmlns="DAV:">/calendars/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/calendar</href>
</schedule-default-calendar-URL>
<getlastmodified>Mon, 02 Jul 2012 22:10:40 GMT</getlastmodified>
<creationdate>2012-07-02T22:10:40Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">ScheduleInboxFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
</multistatus>

接下来，我尝试了相同的请求，只是针对不同的URL。这次，我使用了通过查询主体获得的URL。现在结果仍然包含该初始集合，但不包含日历。

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PROPFIND /calendars/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/ (CalendarHomeSet)

<propfind xmlns="DAV:">

</propfind>

响应：

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<multistatus xmlns="DAV:">
<response>
<href>/calendars/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
<propstat>
<prop>
<getetag>"4293-1000-4FFC9A16"</getetag>
<current-user-principal>
<href>/principals/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9/</href>
</current-user-principal>
<displayname>Test User</displayname>
<getcontenttype>httpd/unix-directory</getcontenttype>
<supportedlock>
<lockentry>
<lockscope>
<exclusive />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
<lockentry>
<lockscope>
<shared />
</lockscope>
<locktype>
<write />
</locktype>
</lockentry>
</supportedlock>
<resourcetype>
<collection />
</resourcetype>
<getcontentlength />
<getlastmodified>Tue, 10 Jul 2012 21:09:42 GMT</getlastmodified>
<creationdate>2012-07-10T21:09:42Z</creationdate>
<resource-class xmlns="http://twistedmatrix.com/xml_namespace/dav/">CalendarHomeFile</resource-class>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
</multistatus>

第三编辑：

这是我用来获取日历首页设置的请求和响应：

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REPORT /principals/users/test/

<D:principal-match xmlns:D="DAV:">
<D:self />
<D:prop>
<C:calendar-home-set xmlns:C="urn:ietf:params:xml:ns:caldav" />
</D:prop>
</D:principal-match>

响应：

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<multistatus xmlns="DAV:">
<response>
<href>/principals/users/test/</href>
<propstat>
<prop>
<calendar-home-set xmlns="urn:ietf:params:xml:ns:caldav">
<href xmlns="DAV:">/calendars/__uids__/d817aaec-7d24-5b38-bc2f-6369da72cdd9</href>
</calendar-home-set>
</prop>
<status>HTTP/1.1 200 OK</status>
</propstat>
</response>
</multistatus>

我现在能想到的两件事：

您是否在指定Depth：1标头？

新用户实际上有日历吗？对于新用户，该列表可能只是空的。

如果这些指针没有帮助，则应显示完整的请求和响应。

编辑

这通常是在CalDAV中进行发现的方式。

对用户提供的网址进行PROPFIND，请求{DAV：} current-user-principal。

使用此URL，您可以执行PROPFIND来查找有关该用户的更多信息。在这里，您通常应该在caldav命名空间中请求calendar-home-set属性。

然后，使用calendar-home-set进行PROPFIND(深度：1)以找到日历。

我有一种感觉，因为您进行了主体匹配，并且不使用current-user-principal；这有点不对劲。但是我不我的直觉是，您检测到的日历居家设置是错误的。