From 8ffc1a7093a6b641f3294368fbf89a8685dfd76a Mon Sep 17 00:00:00 2001
From: "yihua.huang" <code4crafter@gmail.com>
Date: Tue, 13 Jan 2015 14:10:00 +0800
Subject: [PATCH] add NPE check for POST method

---
 .../us/codecraft/webmagic/downloader/HttpClientDownloader.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java b/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java
index 1891ef53..5c1c65d4 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java
@@ -158,7 +158,7 @@ public class HttpClientDownloader extends AbstractDownloader {
         } else if (method.equalsIgnoreCase(HttpConstant.Method.POST)) {
             RequestBuilder requestBuilder = RequestBuilder.post();
             NameValuePair[] nameValuePair = (NameValuePair[]) request.getExtra("nameValuePair");
-            if (nameValuePair.length > 0) {
+            if (nameValuePair != null && nameValuePair.length > 0) {
                 requestBuilder.addParameters(nameValuePair);
             }
             return requestBuilder;