public void Process(Crawler crawler, PropertyBag propertyBag)
{
HtmlDocument htmlDoc = propertyBag["HtmlDoc"].Value as HtmlDocument;
if (htmlDoc == null)
{
return; //this happens with HTTP errors etc. We don't bother with retrying or anything like that :(
}
//only process the review page
if (propertyBag.ResponseUri.OriginalString != CrawlReviews.baseUri)
{
return;
}
lock (this)
{
GoodReadsCrawlerEntities context = CrawlUtil.getNewContext();
Review review = CrawlUtil.getReview(context, ReviewId);
if (review == null)
{
return; //this should never happen
}
//userId int Checked
//userIdString varchar(256) Checked
//reviewContent varchar(MAX) Checked
//starRating smallint Checked
//publishDate date Checked
//recommendedFor varchar(MAX) Checked
//numComments int Checked
HtmlNode doc = htmlDoc.DocumentNode;
int userId = -1;
string userIdString = null;
string userName = null;
string reviewContent = null;
short starRating = -1;
DateTime publishDate;
//string recommendedFor = null;
int numComments = -1;
var reviewAuthorNode = doc.SelectSingleNode("//a[@itemprop='author']");
if (reviewAuthorNode != null)
{
userIdString = reviewAuthorNode.GetAttributeValue("href", null);
userIdString = CrawlUtil.extractUserIdStringFromUrl(userIdString); //null if error
userId = CrawlUtil.extractUserIdFromString(userIdString); //-1 or 0 if error
userName = reviewAuthorNode.InnerText.Trim(); //empty if error
if (userIdString != null && userId > 0 && !String.IsNullOrEmpty(userName))
{
var user = CrawlUtil.createOrGetUser(context, userId, userIdString, userName);
review.User = user;
review.userIdString = userIdString;
}
//<a href="/user/show/52663-mer" class="userReview" itemprop="author">Mer</a>
}
var reviewContentNode = doc.SelectSingleNode("//div[@itemprop='reviewBody']");
if (reviewContentNode != null)
{
review.reviewContent = reviewContentNode.InnerText.Trim();
}
var starRatingNode = doc.SelectSingleNode("//div[@class='rating']/span[@class='value-title']");
if (starRatingNode != null)
{
short.TryParse(starRatingNode.GetAttributeValue("title", ""), out starRating);
review.starRating = starRating;
//<span class="value-title" title="5"></span>
}
var publishDateNode = doc.SelectSingleNode("//div[@class='right dtreviewed greyText smallText']/span[@class='value-title']");
if (publishDateNode != null)
{
DateTime.TryParse(publishDateNode.GetAttributeValue("title", ""), out publishDate);
review.publishDate = publishDate;
//<span class="value-title" title="2007-04-28"></span>
}
var recomendedForNode = doc.SelectSingleNode("//span[text()='Recommended for:']");
if (recomendedForNode != null)
{
review.recommendedFor = recomendedForNode.ParentNode.LastChild.InnerText.Trim();
/*
* <div>
* <span class="">Recommended for:</span>
* enviornmentalists, nurturers, parents and children who want to discuss empathy and reciprocity
* </div>
*/
}
//var numCommentsNode = doc.SelectSingleNode("");
//if (numCommentsNode != null)
//{
// /*
// * <h2 class="brownBackground">
// * <div class="extraHeader">
// * <a href="#comment_form" rel="nofollow">Post a comment »</a>
// * </div>Comments
// * <span class="smallText">
// (showing
// 1-5
// of
// 5)
// </span>
// * ...
// * </h2>
// */
//}
context.SaveChanges();
CrawlReviews.form.appendLineToLog("Added review " + review.id + " by user " + review.User.name);
}
}
