Use UnprotectedRootAction instead of ProjectAction. Fix #48

src/main/java/org/jenkinsci/plugins/ghprb/Ghprb.java

@@ -77,7 +77,7 @@ void stop() {
 	/*          INFO METHODS                */
 
 	public String getHookUrl(){
-		return Jenkins.getInstance().getRootUrl() + project.getUrl() + GhprbProjectAction.URL + "/";
+		return Jenkins.getInstance().getRootUrl() + GhprbRootAction.URL + "/";
 	}
 
 	public boolean isRetestPhrase(String comment){

src/main/java/org/jenkinsci/plugins/ghprb/GhprbProjectAction.java

@@ -1,9 +1,7 @@
-
 package org.jenkinsci.plugins.ghprb;
 
 import hudson.model.ProminentProjectAction;
 import java.io.IOException;
-import java.io.Reader;
 import java.io.StringReader;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -13,6 +11,7 @@
 /**
  * @author janinko
  */
+@Deprecated
 public class GhprbProjectAction implements ProminentProjectAction{
 	static final String URL = "ghprbhook";
 	private GhprbGitHub gh;

src/main/java/org/jenkinsci/plugins/ghprb/GhprbRepository.java

@@ -143,7 +143,7 @@ public String getRepoUrl(){
 	}
 
 
-	private static final EnumSet EVENTS = EnumSet.of(GHEvent.ISSUE_COMMENT, GHEvent.PULL_REQUEST);
+	private static final EnumSet<GHEvent> EVENTS = EnumSet.of(GHEvent.ISSUE_COMMENT, GHEvent.PULL_REQUEST);
 	private boolean hookExist() throws IOException{
 		for(GHHook h : repo.getHooks()){
 			if(!"web".equals(h.getName())) continue;

src/main/java/org/jenkinsci/plugins/ghprb/GhprbRootAction.java

@@ -0,0 +1,96 @@
+package org.jenkinsci.plugins.ghprb;
+
+import hudson.Extension;
+import hudson.model.AbstractProject;
+import hudson.model.UnprotectedRootAction;
+import hudson.security.ACL;
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import jenkins.model.Jenkins;
+import org.acegisecurity.Authentication;
+import org.acegisecurity.context.SecurityContextHolder;
+import org.kohsuke.github.GHEventPayload;
+import org.kohsuke.github.GHRepository;
+import org.kohsuke.stapler.StaplerRequest;
+import org.kohsuke.stapler.StaplerResponse;
+
+/**
+ * @author Honza Brázdil <jbrazdil@redhat.com>
+ */
+@Extension
+public class GhprbRootAction implements UnprotectedRootAction {
+	static final String URL = "ghprbhook";
+
+	public String getIconFileName() {
+		return null;
+	}
+
+	public String getDisplayName() {
+		return null;
+	}
+
+	public String getUrlName() {
+		return URL;
+	}
+
+	public void doIndex(StaplerRequest req, StaplerResponse resp) {
+		String event = req.getHeader("X-Github-Event");
+		String payload = req.getParameter("payload");
+		if(payload == null){
+			Logger.getLogger(GhprbRootAction.class.getName()).log(Level.SEVERE, "Request doesn't contain payload.");
+			return;
+		}
+
+		GhprbGitHub gh = GhprbTrigger.getDscp().getGitHub();
+
+		Logger.getLogger(GhprbRootAction.class.getName()).log(Level.WARNING, "Got payload event: {0}", event);
+		try{
+			if("issue_comment".equals(event)){
+				GHEventPayload.IssueComment issueComment = gh.get().parseEventPayload(new StringReader(payload), GHEventPayload.IssueComment.class);
+				for(GhprbRepository repo : getRepos(issueComment.getRepository())){
+					repo.onIssueCommentHook(issueComment);
+				}
+			}else if("pull_request".equals(event)) {
+				GHEventPayload.PullRequest pr = gh.get().parseEventPayload(new StringReader(payload), GHEventPayload.PullRequest.class);
+				//for(GhprbRepository repo : getRepos(pr.getPullRequest().getRepository())){ // not working with github-api v1.40
+				for(GhprbRepository repo : getRepos(pr.getPullRequest().getBase().getRepository())){ // WA until ^^ fixed
+					repo.onPullRequestHook(pr);
+				}
+			}else{
+				Logger.getLogger(GhprbRootAction.class.getName()).log(Level.WARNING, "Request not known");
+			}
+		}catch(IOException ex){
+			Logger.getLogger(GhprbRootAction.class.getName()).log(Level.SEVERE, "Failed to parse github hook payload.", ex);
+		}
+	}
+
+	private Set<GhprbRepository> getRepos(GHRepository repo) throws IOException{
+		return getRepos(repo.getOwner().getLogin() + "/" + repo.getName());
+	}
+
+	private Set<GhprbRepository> getRepos(String repo){
+		HashSet<GhprbRepository> ret = new HashSet<GhprbRepository>();
+
+		// We need this to get acces to list of repositories
+		Authentication old = SecurityContextHolder.getContext().getAuthentication();
+        SecurityContextHolder.getContext().setAuthentication(ACL.SYSTEM);
+
+		try{
+			for(AbstractProject<?,?> job : Jenkins.getInstance().getAllItems(AbstractProject.class)){
+				GhprbTrigger trigger = job.getTrigger(GhprbTrigger.class);
+				if(trigger == null) continue;
+				GhprbRepository r = trigger.getGhprb().getRepository();
+				if(repo.equals(r.getName())){
+					ret.add(r);
+				}
+			}
+		}finally{
+			SecurityContextHolder.getContext().setAuthentication(old);
+		}
+		return ret;
+	}
+}

src/main/java/org/jenkinsci/plugins/ghprb/GhprbTransientProjectActionFactory.java

@@ -12,6 +12,7 @@
  * @author janinko
  */
 @Extension
+@Deprecated
 public class GhprbTransientProjectActionFactory extends TransientProjectActionFactory{
 
 	@Override

src/main/resources/org/jenkinsci/plugins/ghprb/GhprbTrigger/help-useGitHubHooks.html

@@ -5,6 +5,6 @@
 	admin rights to specified repository.<br/>
 	If you want to create hook manualy set it for event types:
 		<code>issue_comment</code>,	<code>pull_request</code>
-	and url <code>http://yourserver.com/jenkins/job/JOBNAME/ghprbhook</code>.<br/>
+	and url <code>http://yourserver.com/jenkins/ghprbhook</code>.<br/>
 	Also your Jenkins server must be accesible from internet.
 </div>