Guillaume Castagnino created HTTPCORE-313:
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             Summary: ContentType.create(final String mimeType, final String 
charset) uncaught exception when charset == ""
                 Key: HTTPCORE-313
                 URL: https://issues.apache.org/jira/browse/HTTPCORE-313
             Project: HttpComponents HttpCore
          Issue Type: Bug
          Components: HttpCore
    Affects Versions: 4.2.1
         Environment: Ubuntu 12.04 LTS with openjdk-7
            Reporter: Guillaume Castagnino


I parse a broken HTTP response from a server that replies with a crafted 
Content-Type header:
Content-Type: text/html; charset=

charset is present, but is empty. When using the EntityUtils.toString method, 
this triggers an uncaught exception in ContentType.create.
Indeed, it calls this:
return create(mimeType, charset != null ? Charset.forName(charset) : null);

charset is checked against the null value. But the empty string is not checked.
Charset.forName("") throws a "java.nio.charset.IllegalCharsetNameException" 
exception which is not caught whereas Charset.forName("broken") throws a 
"java.nio.charset.UnsupportedCharsetException" exception, which is correctly 
handled.

So I think that the empty string should be checked and managed like the null, 
isn't it ?

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