private static Uri CreateUriWithQueryString(FormSearch formSearch)
{
//http://media.ethics.ga.gov/search/Campaign/Campaign_OfficeSearchResults.aspx?
//ElectionYear=2018&County=&City=&OfficeTypeID=120&District=&Division=&FilerID=&OfficeName=State%20Senate&Circuit=
var sb = new StringBuilder(OfficeSearchResultsUrl);
sb.Append("?ElectionYear=");
sb.Append(formSearch.ElectionYear);
sb.Append("&County=");
sb.Append(formSearch.County);
sb.Append("&City=");
sb.Append(formSearch.City);
sb.Append("&OfficeTypeID=");
sb.Append(formSearch.OfficeTypeId);
sb.Append("&District=");
sb.Append(formSearch.District);
sb.Append("&Division=");
sb.Append(formSearch.Division);
sb.Append("&FilerID=");
sb.Append(formSearch.FilerId);
sb.Append("&OfficeName=");
sb.Append(formSearch.OfficeName.Replace(" ", "%20"));
sb.Append("&Circuit=");
sb.Append(formSearch.Circuit);
var url = System.Web.HttpUtility.UrlPathEncode(sb.ToString());
return(new Uri(url));
}
public static bool ReadSubsequentPage(FormSearch formSearch)
{
var pageNumber = CurrentStatus.LastPageCompleted + 1;
var officeNameAndId = $"Office {formSearch.OfficeName}-{formSearch.OfficeTypeId}, Pg {pageNumber}";
var contentString = PostIt(CurrentStatus.TheUri, pageNumber).Result;
if (!_httpRespMsg.IsSuccessStatusCode)
{
CurrentStatus.LastOpMessage = $"ReadSubsequentPage {officeNameAndId} call returned Status Code: {_httpRespMsg.StatusCode}";
CurrentStatus.ScrapeComplete = true;
CurrentStatus.LastPageCompleted++;
return(false);
}
if (string.IsNullOrEmpty(contentString))
{
CurrentStatus.LastOpMessage = $"ReadSubsequentPage {officeNameAndId} received null content";
CurrentStatus.ScrapeComplete = true;
CurrentStatus.LastPageCompleted++;
return(false);
}
//CurrentStatus.LastOpMessage = "ReadSubsequentPage received document length = " + contentString.Length;
var pipeData = contentString.Split('|');
StorePostData(pipeData);
const string tgtTable = "/div/div/table/tr";
var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(pipeData[3]);
var nodes = htmlDoc.DocumentNode.SelectNodes(tgtTable);
if (nodes == null)
{
CurrentStatus.ScrapeComplete = true;
CurrentStatus.LastOpMessage = $"ReadSubsequentPage {officeNameAndId} Data table search returned null nodes.";
CurrentStatus.LastPageCompleted++;
return(false);
}
var rows = ProcessTable(formSearch, nodes, pageNumber);
//CurrentStatus.LastOpMessage = $"ReadSubsequentPage read page {pageNumber} with candidate count " + (rows - 2);
CurrentStatus.TotalCandidates += (rows - 2);
CurrentStatus.LastPageCompleted++;
if (CurrentStatus.TotalPages == pageNumber)
{
CurrentStatus.ScrapeComplete = true;
return(false); // Last page, don't continue
}
// More pages to do.
return(true);
}
private bool RunQuery(FormSearch search)
{
SeqStatus.TheFormSearch = search;
if (!UpdateCandidates.ReadFirstPage(search))
{
// Don't continue, say why
switch (UpdateCandidates.CurrentStatus.TotalPages)
{
case -2:
// Problem with internet connection
SeqStatus.LastOpMessage =
$"RunQuery: Fail in first page search for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}: {UpdateCandidates.CurrentStatus.LastOpMessage}";
SeqStatus.SequenceFail = true;
return(false);
case -1:
// Problem with search: Could not retrieve URL, null content
SeqStatus.LastOpMessage =
$"RunQuery: Fail in first page search for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}: {UpdateCandidates.CurrentStatus.LastOpMessage}";
break;
case 0:
// No candidates found in category
SeqStatus.LastOpMessage =
$"RunQuery: No candidates found for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}.";
break;
case 1:
// Only one page of results
SeqStatus.LastOpMessage =
$"RunQuery: Found {UpdateCandidates.Candidates.Count} for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}.";
break;
default:
SeqStatus.LastOpMessage =
$"RunQuery: ReadFirstPage said don't continue for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}, PageCount: {UpdateCandidates.CurrentStatus.TotalPages}: Should never get here!";
break;
}
}
while (UpdateCandidates.CurrentStatus.LastPageCompleted < UpdateCandidates.CurrentStatus.TotalPages)
{
// SeqStatus.LastOpMessage = $"RunQuery: Reading subsequent page {pageCounter++} for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}.";
var finished = UpdateCandidates.ReadSubsequentPage(search);
}
var candidates = UpdateCandidates.Candidates;
//SeqStatus.LastOpMessage =
// $"RunQuery: Finished query for {search.OfficeName}, officeTypeId: {search.OfficeTypeId}, Candidate Count: {UpdateCandidates.CurrentStatus.TotalCandidates}";
return(true);
}
public static bool ReadFirstPage(FormSearch formSearch)
{
const string tgtNoResults = "//*[@id=\"ctl00_ContentPlaceHolder1_lblMessage\"]";
const string tgtTable = "/html/body/form/table/tr[2]/td/table/tr/td[2]/div/div/div/table/tr";
const string tgtFooter = "//*[@id=\"ctl00_ContentPlaceHolder1_pSection\"]";
const string tgtHiddenFields = "/html/body/form/input";
var officeNameAndId = $"Office {formSearch.OfficeName}-{formSearch.OfficeTypeId}";
ResetStatus(true, true); // sets TotalPages = -1
CurrentStatus.TheUri = CreateUriWithQueryString(formSearch);
CurrentStatus.Url = CurrentStatus.TheUri.OriginalString;
try
{
_httpRespMsg = GetSearchPage(CurrentStatus.TheUri, HttpMethod.Get).Result;
Log.Debug(ListHeaderValues());
_aspnetSessionId = GetSessionId(_httpRespMsg);
Log.Debug($"ASPNET_SessionId = {_aspnetSessionId}");
}
catch (Exception ex)
{
CurrentStatus.LastOpMessage = $"ReadFirstPage {officeNameAndId} exception calling GetSearchPage: {Utils.ExceptionInfo(ex)}";
CurrentStatus.ScrapeComplete = true;
CurrentStatus.TotalPages = -2;
return(false);
}
if (!_httpRespMsg.IsSuccessStatusCode)
{
CurrentStatus.LastOpMessage = $"ReadFirstPage {officeNameAndId} could not retrieve URL, StatusCode: {_httpRespMsg.StatusCode}";
CurrentStatus.ScrapeComplete = true;
CurrentStatus.TotalPages = -1;
return(false);
}
var contentString = _httpRespMsg.Content.ReadAsStringAsync().Result;
BytesReceived += contentString.Length;
if (string.IsNullOrEmpty(contentString))
{
CurrentStatus.LastOpMessage = "ReadFirstPage {officeNameAndId} received null content";
CurrentStatus.ScrapeComplete = true;
CurrentStatus.TotalPages = -1;
return(false);
}
// CurrentStatus.LastOpMessage = "ReadFirstPage received document length = " + contentString.Length;
var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(contentString);
// Check for "Search Returned No Results"
var noResultsNodes = htmlDoc.DocumentNode.SelectNodes(tgtNoResults);
if (noResultsNodes != null)
{
if (noResultsNodes[0].InnerHtml.Contains("Search Returned No Results."))
{
CurrentStatus.LastOpMessage = $"Search Returned No Candidates for {officeNameAndId}";
CurrentStatus.TotalPages = 0;
CurrentStatus.TotalCandidates = 0;
CurrentStatus.ScrapeComplete = true;
return(false);
}
}
// Get Hidden Input fields from the HTML Head
var headNodes = htmlDoc.DocumentNode.SelectNodes(tgtHiddenFields);
StoreHidden(headNodes);
// if you use HtmlWeb.Load(URL), run StoreHidden twice from two divs at this level
// CurrentStatus.LastOpMessage = "StoreHidden: Arguments Added: " + HiddenArguments.Count;
// PrintKeysAndValues(HiddenArguments);
// Get page info from the footer
var footerNodes = htmlDoc.DocumentNode.SelectNodes(tgtFooter);
if (footerNodes == null)
{
CurrentStatus.ScrapeComplete = true;
CurrentStatus.LastOpMessage = $"ReadFirstPage: FooterNodes search returned null for {officeNameAndId}";
return(false);
}
var footerNodesIh = footerNodes[0].InnerHtml;
var pageAndCount = ScrapHelp.GetCurrentPageAndCount(footerNodesIh);
// CurrentStatus.LastOpMessage = "Page: " + pageAndCount.Item1 + ", PageCount: " + pageAndCount.Item2;
CurrentStatus.TotalPages = pageAndCount.Item2;
var hasPageSelectorRow = pageAndCount.Item2 > 1; // If there is only a single page there is no Page selector row
CurrentStatus.LastOpMessage = $"ReadFirstPage: Page count for {officeNameAndId} = {pageAndCount.Item2}.";
// Get candidate data from the table
var nodes = htmlDoc.DocumentNode.SelectNodes(tgtTable);
if (nodes == null)
{
CurrentStatus.ScrapeComplete = true;
CurrentStatus.LastOpMessage = $"ReadFirstPage: Data table search returned null for {officeNameAndId}.";
return(false);
}
var htmlDocTh = new HtmlDocument();
htmlDocTh.LoadHtml(nodes[0].InnerHtml);
var htmlBodyTh = htmlDocTh.DocumentNode.SelectNodes("//th");
// Check if the column headers have changed
const string thNames = "ActionCandidate NameElection YearDOI Filed";
var checkStr = htmlBodyTh.Aggregate(string.Empty, (current, th) => current + th.InnerText); // was InnerHtml for HtmlWeb.Load
if (thNames != checkStr)
{
CurrentStatus.ScrapeComplete = true;
CurrentStatus.LastOpMessage = $"ReadFirstPage: {officeNameAndId}, Table header mismatch, should be: {thNames} but is: {checkStr}";
return(false);
}
// Go through the table nodes
CurrentStatus.LastOpMessage = $"ReadFirstPage: Calling ProcessTable for {officeNameAndId}, nodes.count = {nodes.Count}, hasPageSelectorRow = {hasPageSelectorRow}.";
var rows = ProcessTable(formSearch, nodes, 1, hasPageSelectorRow);
CurrentStatus.LastOpMessage = $"ReadFirstPage read page 1 for {officeNameAndId} with candidate count {rows}";
CurrentStatus.LastPageCompleted = 1;
if (CurrentStatus.TotalPages == 1)
{
CurrentStatus.ScrapeComplete = true;
return(false); // Last page, don't continue
}
// More pages to do.
return(true);
}
/// <summary>
/// Returns number of candidate rows processed
/// </summary>
/// <param name="formSearch">FormSearch object to set querystring</param>
/// <param name="nodes">The collection of HTML nodes</param>
/// <param name="pageNumber">The current page number of the query results</param>
/// <param name="hasPageSelectorRow"></param>
/// <returns></returns>
private static int ProcessTable(FormSearch formSearch, HtmlNodeCollection nodes, int pageNumber, bool hasPageSelectorRow = true)
{
var rowIndex = 0; // Start with first candidate data row
var lastCandidateRowIdx = nodes.Count - (hasPageSelectorRow ? 2 : 1);
foreach (var node in nodes)
{
if (rowIndex == 0)
{
rowIndex++;
continue;
} // Already checked headers
if (rowIndex == lastCandidateRowIdx + 1)
{
// never gets here if no hasPageSelectorRow: ie single page
return(lastCandidateRowIdx);
} // Last row not needed
var candidateNode = node.InnerHtml;
var nameIdIdx =
candidateNode.IndexOf("NameID=", StringComparison.Ordinal) +
7; // .....&NameID=26758&FilerID=C2017000427&Type=candidate
var truncatedInner = candidateNode.Substring(nameIdIdx); // 26758&FilerID=C2017000427&Type=candidate.....
var nameIdEndIdx =
truncatedInner.IndexOf("&", StringComparison.Ordinal) - 1; // 26758 &FilerID=C2017000427&Type=candidate
var filerIdStIdx =
truncatedInner.IndexOf("FilerID=", StringComparison.Ordinal) +
8; // 26758&FilerID= C2017000427&Type=candidate
var filerIdEndIdx =
truncatedInner.IndexOf("Type=", StringComparison.Ordinal) -
5; // 26758&FilerID=C2017000427 &Type=candidate
var nameId = truncatedInner.Substring(0, nameIdEndIdx + 1);
var filerId = truncatedInner.Substring(filerIdStIdx, filerIdEndIdx - filerIdStIdx);
var candidate = new Candidate {
NameId = nameId, FilerId = filerId, OfficeTypeId = formSearch.OfficeTypeId, OfficeName = formSearch.OfficeName
};
var last3TdStr = truncatedInner.Substring(truncatedInner.IndexOf("<td", StringComparison.Ordinal));
var htmlDocTr = new HtmlDocument();
htmlDocTr.LoadHtml("<tr>" + last3TdStr.Trim() + "</tr");
var trBody = htmlDocTr.DocumentNode.SelectNodes("//tr");
var tdCounter = 0;
foreach (var td in trBody.Descendants())
{
var tdText = td.InnerText.Trim();
// Was idx 0,5,10 for HtmlWeb.Load
switch (tdCounter++)
{
case 3:
candidate.CandidateName = tdText;
break;
case 7:
var year = 0;
if (!Int32.TryParse(tdText, out year))
{
candidate.Notes += "Empty Election Year.";
if (tdText != string.Empty)
{
CurrentStatus.LastOpMessage = $"Non-int year text: {tdText} for candidate {candidate.CandidateName}.";
}
}
candidate.Year = year;
break;
case 13:
case 16:
if (!DateTime.TryParse(tdText, out var dateDoiFiled))
{
candidate.Notes += "Empty DOI date.";
if (tdText != string.Empty)
{
CurrentStatus.LastOpMessage = $"Non-Date DOI text: {tdText} for candidate {candidate.CandidateName}.";
}
}
candidate.DoiFiled = dateDoiFiled;
break;
default:
// Log.Info($"Process table encountered unknown tdCounter value: {tdCounter}");
break;
}
}
rowIndex++;
// Get the additional data: office district, affiliation, status
AdditionalInfo.ReadThePage(candidate);
Candidates.Add(candidate);
}
return(hasPageSelectorRow ? rowIndex - 1 : rowIndex - 2);
}