/// <summary>
/// Sends an HTTP Request to the backend and parse the response (expected as a list of objects)
/// </summary>
/// <param name="action">action to query (e.g. "Snippets/Get")</param>
/// <param name="data">
/// if the request is a GET, the parameters to be put in the querystring (e.g. "snippetID=100"),
/// otherwise data to be put in the post (e.g. "content=...")
/// </param>
/// <param name="isPost">whether this request is a GET(false) or a POST(true)</param>
/// <param name="requiresLogin">false if this request calls a public web service</param>
/// <returns>null if any error occurred; the result of the invocation otherwise</returns>
protected S2CResListObj <string> SendReqListObj(string action, string data, bool isPost, bool requiresLogin = true)
{
string response = PrepareAndSendReq(action, data, isPost, requiresLogin);
if (string.IsNullOrEmpty(response))
{
ErrorCodes errCode = ErrorCodes.COMMUNICATION_ERROR;
if (WebConnector.Current.IsTimeout)
{
errCode = ErrorCodes.TIMEOUT;
}
SetLastError(log, errCode, S2CRes <string> .GetErrorMsg(errCode));
return(new S2CResListObj <string>(0.0, errCode, null, 0));
}
S2CResListObj <string> resp = S2CSerializer.DeserializeObjList(response, m_serialFormat);
if (!CheckResp <string>(resp))
{
PrintRespError <string>(resp);
//if the problem is related to user not logged in, reset login status and retry another time:
if (requiresLogin && (resp != null) && (resp.Status == ErrorCodes.NOT_LOGGED_IN))
{
WebConnector.Current.ResetLoginStatus(); //reset login status
//retry the WS call:
response = PrepareAndSendReq(action, data, isPost, requiresLogin);
resp = S2CSerializer.DeserializeObjList(response, m_serialFormat);
}
}
return(resp);
}
public ICollection <int> GetChannels(long snippetID)
{
//check for erroneous input:
if (snippetID <= 0)
{
SetLastError(log, ErrorCodes.WRONG_INPUT, string.Format("Input error: snippetID={0}", snippetID));
return(new List <int>());
}
//send the request and parse the response:
S2CResListObj <string> resp = SendReqListObj(GET_CHANNELS_URL, "id=" + snippetID, false, false);
//build the result:
int totNum = 0;
return(resp.GetListOfIntFromResp(out totNum));
}
public IList <long> FindPublicItemsID(int start, int count, int minRelevance, out int totNum)
{
//check for erroneous input:
totNum = 0;
if ((count <= 0) || (start < 0))
{
SetLastError(log, ErrorCodes.WRONG_INPUT,
string.Format("Input error: userID={0}, count={1}, start={2}", CurrentUserID, count, start));
return(new List <long>());
}
//send the request and parse the response:
string querystring = string.Format("start={0}&count={1}&minRelevance={2}", start, count, minRelevance);
S2CResListObj <string> resp = SendReqListObj(FINDPUB_SNIPPETS_URL, querystring, false, false);
//build the result:
IList <long> snipIDs = resp.GetListOfLongsFromResp(out totNum);
return(snipIDs);
}