/// <summary>
/// Generates a response from a GCalRequest
/// </summary>
/// <returns></returns>
public string GenerateResponse()
{
/* Create a string builder to hold the text for the response */
StringBuilder result = new StringBuilder(4096);
/* Create an exchange provider */
ExchangeService gateway = new ExchangeService(
ConfigCache.ExchangeServerUrl,
ConfigCache.ExchangeUserLogin,
ConfigCache.ExchangeUserPassword);
/* Return the exchangers from the GCal Request that was passed in */
DateTimeRange range = new DateTimeRange(request.UTCStartDate, request.UTCEndDate);
ExchangeUserDict exchangeUsers = gateway.SearchByEmail(range, request.ExchangeUsers);
/* Create the header of the request */
result.AppendFormat("['{0}','{1}',", request.VersionNumber, request.MessageId);
result.AppendFormat("['_ME_AddData','{0}/{1}','{2}'",
DateUtil.FormatDateForGoogle(request.StartDate),
DateUtil.FormatDateForGoogle(request.EndDate),
DateUtil.FormatDateTimeForGoogle(request.Since));
/* Flag for inserting commas */
bool firstUser = true;
result.Append(",[");
foreach (ExchangeUser user in exchangeUsers.Values)
{
/* Don't add a comma if this is the first user */
if (!firstUser)
{
result.Append(",");
}
/* Add the user's credentials */
string email = ConfigCache.MapToExternalDomain(user.Email);
result.AppendFormat("'{0}','{1}','{2}',[",
user.DisplayName,
email,
(int)user.AccessLevel);
GenerateResponseForTimeBlocks(user,
result);
result.Append("]");
firstUser = false;
}
result.Append("]");
result.Append("]");
result.Append("]");
log.Info("GCal Free/Busy response successfully generated.");
log.DebugFormat("Response = {0}", result);
return(result.ToString());
}
public void TestParseWithDomainMap()
{
string id = "test-id";
List <string> srcEmails = new List <string>();
srcEmails.Add("*****@*****.**");
srcEmails.Add("*****@*****.**");
srcEmails.Add("*****@*****.**");
srcEmails.Add("*****@*****.**");
List <string> dstEmails = new List <string>();
dstEmails.Add("*****@*****.**");
dstEmails.Add("*****@*****.**");
dstEmails.Add("*****@*****.**");
dstEmails.Add("*****@*****.**");
DateTime start = DateUtil.ParseDateToUtc("2008-01-01T00:00:00.000Z");
DateTime end = DateUtil.ParseDateToUtc("2008-01-31T00:00:00.000Z");
DateTime since = DateUtil.ParseDateToUtc("2008-01-01T00:00:00.000Z");
string tz = "America/Los_Angeles";
string query = string.Format("[ 1, {0}, [{1}], {2}/{3}, {4}, {5}]",
id,
createEmailList(srcEmails),
createDate(start),
createDate(end),
createDateTime(since),
tz);
ConfigCache.AddDomainMap("example.org", "woot.org");
GCalFreeBusyRequest request =
new GCalFreeBusyRequest(query);
Assert.AreEqual(start, request.StartDate);
Assert.AreEqual(end, request.EndDate);
Assert.AreEqual(since, request.Since);
Assert.AreEqual(id, request.MessageId);
Assert.AreEqual("1", request.VersionNumber);
Assert.AreEqual(dstEmails.Count, request.ExchangeUsers.Length);
for (int i = 0; i < request.ExchangeUsers.Length; i++)
{
Assert.AreEqual(dstEmails[i], request.ExchangeUsers[i]);
}
}
/// <summary>
/// Parses the incoming Exchange request from GCal. The requests are of the form:
/// [ version #, ID, [list of emails], startdate/enddate, sincedata, timezone]
/// /// </summary>
/// <param name="rawInput">The incoming GCal request string</param>
private void Parse(string rawInput)
{
if (rawInput != null)
{
rawInput = rawInput.Trim();
}
/* Test that the request is not null or empty */
if (string.IsNullOrEmpty(rawInput))
{
throw new GCalExchangeException(GCalExchangeErrorCode.MalformedRequest,
"GCalRequest is null or empty.");
}
log.InfoFormat("Request received from GCal. [body={0}]", rawInput);
/* Test that the request has starting and ending brackets */
if (!rawInput.StartsWith("[") || !rawInput.EndsWith("]"))
{
throw new GCalExchangeException(GCalExchangeErrorCode.MalformedRequest,
String.Format("GCalRequest does start and end in brackets: [rawInput:{0}]", rawInput));
}
/* Remove the start and end brackets */
string requestContent = rawInput.Remove(0, 1);
requestContent = requestContent.Remove(requestContent.Length - 1, 1);
/* Request is cleaned to have no ending brackets */
/* Test that the request has an inner bracket pair which (should) contains the usernames */
if (!(requestContent.Contains("[") && requestContent.IndexOf("]") > requestContent.IndexOf("[")))
{
throw new GCalExchangeException(GCalExchangeErrorCode.MalformedRequest,
string.Format("GCalRequest exchange users section is not properly formatted: [rawInput:{0}]", rawInput));
}
/* Get the indexes of the start and end username brackets */
int usersStartIndex = requestContent.IndexOf("[");
int usersEndIndex = requestContent.IndexOf("]");
int usersLength = usersEndIndex - usersStartIndex + 1;
/* Get the usernames string from the request */
string usersString = requestContent.Substring(usersStartIndex, usersLength);
/* Remove it from the rest of the request */
requestContent = requestContent.Remove(usersStartIndex, usersLength);
/* Remove the brackets from the start and end of the username string */
usersString = usersString.Remove(0, 1);
usersString = usersString.Remove(usersString.Length - 1, 1);
/* Split the usernames by comma, store them in the request object */
exchangeUsers = usersString.Split(',');
// Apply any domain mappings to the user names
for (int i = 0; i < exchangeUsers.Length; i++)
{
string user = exchangeUsers[i].Trim();
exchangeUsers[i] = ConfigCache.MapToLocalDomain(user);
}
/* Split up the rest of the request */
string[] requestItems = requestContent.Split(',');
/* Test that the proper amount of variables remain in the string */
if (requestItems.Length != expectedRequestItems)
{
throw new GCalExchangeException(GCalExchangeErrorCode.MalformedRequest,
String.Format("GCalRequest does not contain the proper amount of variables; Supplied - {0}, Expected - {1}",
requestItems.Length,
expectedRequestItems));
}
/* Retrieve the version and message ids */
versionNumber = requestItems[0].Trim();
messageId = requestItems[1].Trim();
/* Get the start and end date from the request, the two dates are separated by '/' */
string dateString = requestItems[3].Trim();
string[] dateArray = dateString.Split('/');
if (dateArray.Length != 2)
{
throw new GCalExchangeException(GCalExchangeErrorCode.MalformedRequest,
"GCalRequest does not contain sufficient date information, both a start and end date must be supplied");
}
startDate = DateUtil.ParseGoogleDate(dateArray[0].Trim());
endDate = DateUtil.ParseGoogleDate(dateArray[1].Trim());
string requestItemSince = requestItems[4].Trim();
/* Get the since field from the request */
try
{
since = DateUtil.ParseGoogleDate(requestItemSince);
}
catch (GCalExchangeException ex)
{
// We don't really use this param anyway and in some cases
// we've seen an invalid date
log.Warn(String.Format("Ignoring incorrect since request parameter {0}",
requestItemSince),
ex);
since = new DateTime();
}
/* Get the current time zone name */
timeZone = OlsonUtil.GetTimeZone(requestItems[5].Trim());
utcStartDate = OlsonUtil.ConvertToUTC(startDate, timeZone);
utcEndDate = OlsonUtil.ConvertToUTC(endDate, timeZone);
}
/// <summary>
/// Query Google Calendar for a user and return the event feed
/// </summary>
/// <param name="email">Email address of the user to query</param>
/// <param name="visibility">Feed Visibility (Public/Private) to query for</param>
/// <param name="projection">Feed projection - type of feed to get</param>
/// <param name="modifiedSince">Last modified time from last check</param>
/// <param name="window">DateTime range to query between</param>
/// <returns>An event feed for the user</returns>
public EventFeed QueryGCal(
string email,
GCalVisibility visibility,
GCalProjection projection,
DateTime modifiedSince,
DateTimeRange window)
{
// Perform mapping on the username if necessary
string user = ConfigCache.MapToExternalDomain(email);
if (log.IsDebugEnabled)
{
log.InfoFormat(
"FeedQuery with parameters: {0}, {1}, {2}, {3} [{4}]",
user,
visibility,
projection,
modifiedSince,
window);
}
StringBuilder sb = new StringBuilder(ConfigCache.GCalAddress);
if (!ConfigCache.GCalAddress.EndsWith("/"))
{
sb.Append("/");
}
sb.AppendFormat("feeds/{0}/", user);
switch (visibility)
{
case GCalVisibility.Public:
sb.Append("public/");
break;
case GCalVisibility.Private:
default:
sb.Append("private/");
break;
}
switch (projection)
{
case GCalProjection.Full:
sb.Append("full");
break;
case GCalProjection.FullNoAttendees:
sb.Append("full-noattendees");
break;
case GCalProjection.Composite:
sb.Append("composite");
break;
case GCalProjection.AttendeesOnly:
sb.Append("attendees-only");
break;
case GCalProjection.FreeBusy:
sb.Append("free-busy");
break;
case GCalProjection.Basic:
default:
sb.Append("basic");
break;
}
EventQuery query = new EventQuery(sb.ToString());
if (projection != GCalProjection.FreeBusy)
{
query.SingleEvents = true;
}
GDataRequestFactory f = (GDataRequestFactory)service.RequestFactory;
f.UseGZip = ConfigCache.EnableHttpCompression;
if (window.Start != DateTime.MinValue)
{
query.StartTime = window.Start;
}
if (window.End != DateTime.MaxValue)
{
query.EndTime = window.End;
}
query.NumberToRetrieve = int.MaxValue; // Make sure we get everything
try
{
return(QueryGCal(query, user, modifiedSince));
}
catch (System.IO.IOException e)
{
// Known problem with .NET 2.0 - Sometimes keep-alive connection is
// closed by a proxy and we need to re-attemp the connection
//
// http://code.google.com/p/google-gdata/wiki/KeepAliveAndUnderlyingConnectionIsClosed
if (e.InnerException.GetType().ToString().Equals("System.Net.Sockets.SocketException"))
{
log.Info(String.Format("Attempt Retry Query after keep-alive termination"));
// One shot retry i case the keep-alive was closed
return(QueryGCal(query, user, modifiedSince));
}
else
{
throw;
}
}
}
