[nutch] 02/04: When fixHttpHeaders is called with null, return null

[snagel]

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commit a83a736793a6f8bdc091acf73c1f00a48d25f4b6
Author: Yossi Tamari <yossi.tam...@pipl.com>
AuthorDate: Sun May 12 12:44:38 2019 +0300

    When fixHttpHeaders is called with null, return null
    
    Instead of NPE.
    This allows the WARC tools to create "resource" entries instead of
    failing.
---
 src/java/org/apache/nutch/tools/WARCUtils.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/java/org/apache/nutch/tools/WARCUtils.java 
b/src/java/org/apache/nutch/tools/WARCUtils.java
index 34365a8..1af6533 100644
--- a/src/java/org/apache/nutch/tools/WARCUtils.java
+++ b/src/java/org/apache/nutch/tools/WARCUtils.java
@@ -186,6 +186,9 @@ public class WARCUtils {
    * @return safe HTTP response header
    */
   public static final String fixHttpHeaders(String headers, int contentLength) 
{
+    if (headers==null) {
+      return null;
+    }
     int start = 0, lineEnd = 0, last = 0, trailingCrLf= 0;
     StringBuilder replace = new StringBuilder();
     while (start < headers.length()) {