Pass the task to onSuccess & onError.

webmagic-core/src/main/java/us/codecraft/webmagic/downloader/AbstractDownloader.java

@@ -3,6 +3,7 @@ package us.codecraft.webmagic.downloader;
 import us.codecraft.webmagic.Page;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Site;
+import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.selector.Html;
 
 /**
@@ -35,15 +36,26 @@ public abstract class AbstractDownloader implements Downloader {
         return (Html) page.getHtml();
     }
 
+    @Deprecated
     protected void onSuccess(Request request) {
     }
 
+    /**
+     * @since 0.7.6
+     */
+    protected void onSuccess(Request request, Task task) {
+        this.onSuccess(request);
+    }
+
     @Deprecated
     protected void onError(Request request) {
-        this.onError(request, null);
     }
 
-    protected void onError(Request request, Throwable e) {
+    /**
+     * @since 0.7.6
+     */
+    protected void onError(Request request, Task task, Throwable e) {
+        this.onError(request);
     }
 
 }

webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java

@@ -82,12 +82,12 @@ public class HttpClientDownloader extends AbstractDownloader {
         try {
             httpResponse = httpClient.execute(requestContext.getHttpUriRequest(), requestContext.getHttpClientContext());
             page = handleResponse(request, request.getCharset() != null ? request.getCharset() : task.getSite().getCharset(), httpResponse, task);
-            onSuccess(request);
+            onSuccess(request, task);
             logger.info("downloading page success {}", request.getUrl());
             return page;
         } catch (IOException e) {
             logger.warn("download page {} error", request.getUrl(), e);
-            onError(request, e);
+            onError(request, task, e);
             return page;
         } finally {
             if (httpResponse != null) {

webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/PhantomJSDownloader.java

@@ -98,9 +98,9 @@ public class PhantomJSDownloader extends AbstractDownloader {
                 page.setRequest(request);
                 page.setStatusCode(200);
             }
-            onSuccess(request);
+            onSuccess(request, task);
         } catch (Exception e) {
-            onError(request, e);
+            onError(request, task, e);
             logger.warn("download page {} error", request.getUrl(), e);
         }
         return page;

webmagic-selenium/src/main/java/us/codecraft/webmagic/downloader/selenium/SeleniumDownloader.java

@@ -111,10 +111,10 @@ public class SeleniumDownloader extends AbstractDownloader implements Closeable
             page.setHtml(new Html(content, request.getUrl()));
             page.setUrl(new PlainText(request.getUrl()));
             page.setRequest(request);
-            onSuccess(request);
+            onSuccess(request, task);
         } catch (Exception e) {
             logger.warn("download page {} error", request.getUrl(), e);
-            onError(request, e);
+            onError(request, task, e);
         } finally {
             if (webDriver != null) {
                 webDriverPool.returnToPool(webDriver);