private string ExecuteValidateRequest(CommentCheckContext context, string action) {
var uri = String.Format(AkismetApiPattern, _apiKey, _endpoint, action);
WebRequest request = WebRequest.Create(uri);
request.Method = "POST";
request.Timeout = 5000; //milliseconds
request.ContentType = "application/x-www-form-urlencoded";
var postData = "blog=" + HttpUtility.UrlEncode(context.Url)
+ "&user_ip=" + HttpUtility.UrlEncode(context.UserIp)
+ "&user_agent=" + HttpUtility.UrlEncode(context.UserAgent)
+ "&referrer=" + HttpUtility.UrlEncode(context.Referrer)
+ "&permalink=" + HttpUtility.UrlEncode(context.Permalink)
+ "&comment_type=" + HttpUtility.UrlEncode(context.CommentType)
+ "&comment_author=" + HttpUtility.UrlEncode(context.CommentAuthor)
+ "&comment_author_email=" + HttpUtility.UrlEncode(context.CommentAuthorEmail)
+ "&comment_author_url=" + HttpUtility.UrlEncode(context.CommentAuthorUrl)
+ "&comment_content=" + HttpUtility.UrlEncode(context.CommentContent);
byte[] content = Encoding.UTF8.GetBytes(postData);
using (Stream stream = request.GetRequestStream()) {
stream.Write(content, 0, content.Length);
}
using (WebResponse webResponse = request.GetResponse()) {
using (var reader = new StreamReader(webResponse.GetResponseStream())) {
return reader.ReadToEnd();
}
}
}
public void ReportHam(CommentCheckContext context) {
try {
var result = ExecuteValidateRequest(context, "submit-ham");
}
catch (Exception e) {
Logger.Error(e, "An error occured while reporting ham");
}
}
public SpamStatus CheckForSpam(CommentCheckContext context) {
try {
var result = ExecuteValidateRequest(context, "comment-check");
if (HandleValidateResponse(_context, result)) {
return SpamStatus.Spam;
}
return SpamStatus.Ham;
}
catch(Exception e) {
Logger.Error(e, "An error occured while checking for spam");
return SpamStatus.Spam;
}
}
public SpamStatus CheckForSpam(CommentCheckContext context, SpamFilterAction action, IContent content) {
if (string.IsNullOrWhiteSpace(context.CommentContent)) {
return SpamStatus.Ham;
}
var spamFilters = GetSpamFilters().ToList();
var result = SpamStatus.Ham;
switch (action) {
case SpamFilterAction.AllOrNothing:
if (spamFilters.All(x => x.CheckForSpam(context) == SpamStatus.Spam)) {
result = SpamStatus.Spam;
}
break;
case SpamFilterAction.One:
if (spamFilters.Any(x => x.CheckForSpam(context) == SpamStatus.Spam)) {
result = SpamStatus.Spam;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
// trigger events and rules
switch (result) {
case SpamStatus.Spam:
_spamEventHandler.SpamReported(content);
_rulesManager.TriggerEvent("AntiSpam", "Spam", () => new Dictionary<string, object> { { "Content", content } });
break;
case SpamStatus.Ham:
_spamEventHandler.HamReported(content);
_rulesManager.TriggerEvent("AntiSpam", "Ham", () => new Dictionary<string, object> { { "Content", content } });
break;
default:
throw new ArgumentOutOfRangeException();
}
return result;
}
public void ReportSpam(CommentCheckContext context) {
var spamFilters = GetSpamFilters().ToList();
foreach(var filter in spamFilters) {
filter.ReportSpam(context);
}
}
private CommentCheckContext CreateCommentCheckContext(SpamFilterPart part, WorkContext workContext) {
var settings = part.TypePartDefinition.Settings.GetModel<SpamFilterPartSettings>();
var data = new Dictionary<string, object> {{"Content", part.ContentItem}};
var context = new CommentCheckContext {
Url = _tokenizer.Replace(settings.UrlPattern, data),
Permalink = _tokenizer.Replace(settings.PermalinkPattern, data),
CommentAuthor = _tokenizer.Replace(settings.CommentAuthorPattern, data),
CommentAuthorEmail = _tokenizer.Replace(settings.CommentAuthorEmailPattern, data),
CommentAuthorUrl = _tokenizer.Replace(settings.CommentAuthorUrlPattern, data),
CommentContent = _tokenizer.Replace(settings.CommentContentPattern, data),
};
if(workContext.HttpContext != null) {
context.UserIp = workContext.HttpContext.Request.ServerVariables["REMOTE_ADDR"];
context.UserAgent = workContext.HttpContext.Request.UserAgent;
context.Referrer = Convert.ToString(workContext.HttpContext.Request.UrlReferrer);
}
return context;
}
