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Have MAPIMessage try the codepage properties to get the ascii encoding, before falling back to the existing logic around content type parsing 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1497038 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2013-06-26 18:46:37 +00:00
parent e82421ef02
commit dd1116a1e3
2 changed files with 40 additions and 12 deletions
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48
src/scratchpad/src/org/apache/poi/hsmf/MAPIMessage.java
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@ -22,6 +22,7 @@ import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
@ -40,6 +41,7 @@ import org.apache.poi.hsmf.datatypes.Chunks;
import org.apache.poi.hsmf.datatypes.MAPIProperty;
import org.apache.poi.hsmf.datatypes.NameIdChunks;
import org.apache.poi.hsmf.datatypes.PropertyValue;
import org.apache.poi.hsmf.datatypes.PropertyValue.LongPropertyValue;
import org.apache.poi.hsmf.datatypes.PropertyValue.TimePropertyValue;
import org.apache.poi.hsmf.datatypes.RecipientChunks;
import org.apache.poi.hsmf.datatypes.RecipientChunks.RecipientChunksSorter;
@ -50,6 +52,9 @@ import org.apache.poi.hsmf.parsers.POIFSChunkParser;
import org.apache.poi.poifs.filesystem.DirectoryNode;
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.util.CodePageUtil;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
/**
* Reads an Outlook MSG File in and provides hooks into its data structure.
@ -60,6 +65,9 @@ import org.apache.poi.poifs.filesystem.POIFSFileSystem;
* [MS-OXCMSG]: Message and Attachment Object Protocol Specification
*/
public class MAPIMessage extends POIDocument {
/** For logging problems we spot with the file */
private POILogger logger = POILogFactory.getLogger(MAPIMessage.class);
private Chunks mainChunks;
private NameIdChunks nameIdChunks;
private RecipientChunks[] recipientChunks;
@ -356,19 +364,39 @@ public class MAPIMessage extends POIDocument {
}
/**
* Many messages store their strings as unicode, which is
* Tries to identify the correct encoding for 7-bit (non-unicode)
* strings in the file.
* <p>Many messages store their strings as unicode, which is
* nice and easy. Some use one-byte encodings for their
* strings, but don't easily store the encoding anywhere
* in the file!
* This method looks at the headers for the message, and
* tries to use these to guess the correct encoding for
* your file.
* Bug #49441 has more on why this is needed
*
* TODO Try to also use PR_MESSAGE_CODEPAGE and PR_INTERNET_CPID
* Would need to refactor some of the codepage support in HPSF first
* strings, but don't always store the encoding anywhere
* helpful in the file.</p>
* <p>This method checks for codepage properties, and failing that
* looks at the headers for the message, and uses these to
* guess the correct encoding for your file.</p>
* <p>Bug #49441 has more on why this is needed</p>
*/
public void guess7BitEncoding() {
// First choice is a codepage property
for (MAPIProperty prop : new MAPIProperty[] {
MAPIProperty.MESSAGE_CODEPAGE,
MAPIProperty.INTERNET_CPID
}) {
List<PropertyValue> val = mainChunks.getProperties().get(prop);
if (val != null && val.size() > 0) {
int codepage = ((LongPropertyValue)val.get(0)).getValue();
try {
String encoding = CodePageUtil.codepageToEncoding(codepage, true);
set7BitEncoding(encoding);
return;
} catch(UnsupportedEncodingException e) {
logger.log(POILogger.WARN, "Invalid codepage ID ", codepage,
" set for the message via ", prop, ", ignoring");
}
}
}
// Second choice is a charset on a content type header
try {
String[] headers = getHeaders();
if(headers != null && headers.length > 0) {

4
src/scratchpad/testcases/org/apache/poi/hsmf/TestBasics.java
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@ -229,8 +229,8 @@ public final class TestBasics extends TestCase {
// Defaults to CP1251
assertEquals("CP1252", chinese.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
// But after guessing goes to the correct one, Big 5
// But after guessing goes to the correct one, cp950 (Windows Traditional Chinese)
chinese.guess7BitEncoding();
assertEquals("big5", chinese.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
assertEquals("cp950", chinese.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
}
}