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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-4699) [classlib][luni] URLConnection.getContentType() works with files incorrectly
Date Thu, 30 Aug 2007 21:36:30 GMT
[classlib][luni] URLConnection.getContentType() works with files incorrectly

                 Key: HARMONY-4699
                 URL: https://issues.apache.org/jira/browse/HARMONY-4699
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Vasily Zakharov

In Harmony implementation, java.net.URLConnection.getContentType() works incorrectly when
addresses a file URL:

1. For files with .rtf extension, RI returns "application/rtf", while Harmony returns "text/rtf".

2. For files with .java extension, RI returns "text/plain", while Harmony returns "content/unknown".

3. For files with .doc extension, RI returns "content/unknown", while Harmony returns "application/msword".
The same is true for other known extensions.

4. For files with unrecognized extension and with HTML content, RI returns "text/html", while
Harmony returns "content/unknown".

Items 1 and 2 look like a minor issues that would better be fixed for compatibility with RI.

Item 3 looks like a non-bug difference, as Harmony behaves clearly better than RI in these

Item 4 looks like a serious bug, as RI clearly looks into file content for the file type,
and Harmony does not. Looks like org.apache.harmony.luni.internal.net.www.protocol.file.FileURLConnection.getContentType()
needs to be fixed to use guessContentTypeFromStream() in addition to guessContentTypeFromName().

The attached archive contains the reproducer with some test files it uses. Here's the reproducer

public class Test {
    static void printContentType(String fileName) throws java.io.IOException {
        System.out.println(fileName + ": " + new java.net.URL("file:" + fileName).openConnection().getContentType());
    public static void main(String argv[]) {
        try {
        } catch (Exception e) {

Output on RI:

test.rtf: application/rtf
Test.java: text/plain
test.doc: content/unknown
test.htx: text/html

Output on Harmony:

test.rtf: text/rtf
Test.java: content/unknown
test.doc: application/msword
test.htx: content/unknown

This issue is a blocker for HARMONY-4696, as on RI JEditorPane.getContentType() should be
based on URLConnection.getContentType() that now works incorrectly.

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