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https://issues.apache.org/jira/browse/MIME4J-49?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612787#action_12612787
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Niklas Therning commented on MIME4J-49:
---------------------------------------

This very simple patch seems to fix this problem. Should I check this in?

Index: src/main/java/org/apache/james/mime4j/AbstractEntity.java
===================================================================
--- src/main/java/org/apache/james/mime4j/AbstractEntity.java   (revision 
675691)
+++ src/main/java/org/apache/james/mime4j/AbstractEntity.java   (working copy)
@@ -163,6 +163,9 @@
             
             // Strip away line delimiter
             int len = fieldbuf.length();
+            if (len == 0 && endOfHeader) {
+                return false;
+            }
             if (len > 0 && fieldbuf.charAt(len - 1) == '\n') {
                 len--;
             }


> Message or body part with empty header causes infinite loop
> -----------------------------------------------------------
>
>                 Key: MIME4J-49
>                 URL: https://issues.apache.org/jira/browse/MIME4J-49
>             Project: Mime4j
>          Issue Type: Bug
>    Affects Versions: 0.4
>            Reporter: Niklas Therning
>             Fix For: 0.4
>
>
> If a message or body part contains an empty header the parser will loop 
> indefinitely (when in non-strict mode). Seems like qmail sometimes sends out 
> failure notices which have body parts with empty headers.

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