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Improve HSMF encoding guessing for 7 bit fields, and allow HSMF access to the HTML body contents in MAPIMessage 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1087726 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2011-04-01 14:51:45 +00:00
parent d955a5b3e0
commit dcdb268d3b
6 changed files with 115 additions and 29 deletions
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4
src/documentation/content/xdocs/status.xml
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@ -33,6 +33,10 @@
</developers>
<changes>
<release version="3.8-beta3" date="2011-??-??">
<action dev="poi-developers" type="add">Improve HSMF encoding guessing for 7 bit fields in MAPIMessage</action>
<action dev="poi-developers" type="add">Allow HSMF access to the HTML body contents in MAPIMessage</action>
</release>
<release version="3.8-beta2" date="2011-??-??">
<action dev="poi-developers" type="add">Implement the load method on MemoryPackagePart</action>
<action dev="poi-developers" type="add">50967 - Support for continued ExtSSTRecords</action>

77
src/scratchpad/src/org/apache/poi/hsmf/MAPIMessage.java
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@ -176,6 +176,16 @@ public class MAPIMessage extends POIDocument {
return getStringFromChunk(mainChunks.textBodyChunk);
}
/**
* Gets the html body of this Outlook Message, if this email
* contains a html version.
* @return The string representation of the 'html' version of the body, if available.
* @throws ChunkNotFoundException
*/
public String getHmtlBody() throws ChunkNotFoundException {
return getStringFromChunk(mainChunks.htmlBodyChunk);
}
/**
* Gets the subject line of the Outlook Message
* @throws ChunkNotFoundException
@ -331,28 +341,59 @@ public class MAPIMessage extends POIDocument {
if(m.matches()) {
// Found it! Tell all the string chunks
String charset = m.group(1);
for(Chunk c : mainChunks.getAll()) {
if(c instanceof StringChunk) {
((StringChunk)c).set7BitEncoding(charset);
}
}
for(Chunk c : nameIdChunks.getAll()) {
if(c instanceof StringChunk) {
((StringChunk)c).set7BitEncoding(charset);
}
}
for(RecipientChunks rc : recipientChunks) {
for(Chunk c : rc.getAll()) {
if(c instanceof StringChunk) {
((StringChunk)c).set7BitEncoding(charset);
}
}
}
set7BitEncoding(charset);
return;
}
}
}
} catch(ChunkNotFoundException e) {}
// Nothing suitable in the headers, try HTML
try {
String html = getHmtlBody();
// Look for a content type in the meta headers
Pattern p = Pattern.compile(
"<META\\s+HTTP-EQUIV=\"Content-Type\"\\s+CONTENT=\"text/html;\\s+charset=(.*?)\""
);
Matcher m = p.matcher(html);
if(m.find()) {
// Found it! Tell all the string chunks
String charset = m.group(1);
set7BitEncoding(charset);
return;
}
} catch(ChunkNotFoundException e) {}
}
/**
* 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!
* If you know what the encoding is of your file, you can
* use this method to set the 7 bit encoding for all
* the non unicode strings in the file.
* @see #guess7BitEncoding()
*/
public void set7BitEncoding(String charset) {
for(Chunk c : mainChunks.getAll()) {
if(c instanceof StringChunk) {
((StringChunk)c).set7BitEncoding(charset);
}
}
for(Chunk c : nameIdChunks.getAll()) {
if(c instanceof StringChunk) {
((StringChunk)c).set7BitEncoding(charset);
}
}
for(RecipientChunks rc : recipientChunks) {
for(Chunk c : rc.getAll()) {
if(c instanceof StringChunk) {
((StringChunk)c).set7BitEncoding(charset);
}
}
}
}
/**

6
src/scratchpad/src/org/apache/poi/hsmf/datatypes/Chunks.java
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@ -37,6 +37,8 @@ public final class Chunks implements ChunkGroup {
public StringChunk messageClass;
/** BODY Chunk, for plain/text messages */
public StringChunk textBodyChunk;
/** BODY Html Chunk, for html messages */
public StringChunk htmlBodyChunk;
/** Subject link chunk, in plain/text */
public StringChunk subjectChunk;
/** Value that is in the TO field (not actually the addresses as they are stored in recip directory nodes */
@ -117,6 +119,10 @@ public final class Chunks implements ChunkGroup {
else if(chunk.getChunkId() == MAPIProperty.BODY.id) {
textBodyChunk = (StringChunk)chunk;
}
else if(chunk.getChunkId() == MAPIProperty.BODY_HTML.id &&
chunk instanceof StringChunk) {
htmlBodyChunk = (StringChunk)chunk;
}
// And add to the main list
allChunks.add(chunk);

33
src/scratchpad/src/org/apache/poi/hsmf/datatypes/StringChunk.java
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@ -30,8 +30,11 @@ import org.apache.poi.util.StringUtil;
* A Chunk made up of a single string.
*/
public class StringChunk extends Chunk {
private String value;
private String encoding7Bit = "CP1252";
private static final String DEFAULT_ENCODING = "CP1252";
private String encoding7Bit = DEFAULT_ENCODING;
private String value;
/** Only kept around for 7 bit strings */
private byte[] rawValue;
/**
* Creates a String Chunk.
@ -56,7 +59,7 @@ public class StringChunk extends Chunk {
public String get7BitEncoding() {
return encoding7Bit;
}
/**
* Sets the Encoding that will be used to
* decode any "7 bit" (non unicode) data.
@ -66,25 +69,33 @@ public class StringChunk extends Chunk {
*/
public void set7BitEncoding(String encoding) {
this.encoding7Bit = encoding;
// Re-read the String if we're a 7 bit one
if(type == Types.ASCII_STRING) {
parseString(rawValue);
}
}
public void readValue(InputStream value) throws IOException {
String tmpValue;
byte[] data = IOUtils.toByteArray(value);
byte[] data = IOUtils.toByteArray(value);
parseString(data);
}
private void parseString(byte[] data) {
String tmpValue;
switch(type) {
case Types.ASCII_STRING:
tmpValue = parseAs7BitData(data, encoding7Bit);
break;
this.rawValue = data;
break;
case Types.UNICODE_STRING:
tmpValue = StringUtil.getFromUnicodeLE(data);
break;
default:
throw new IllegalArgumentException("Invalid type " + type + " for String Chunk");
}
// Clean up
this.value = tmpValue.replace("\0", "");
this.value = tmpValue.replace("\0", "");
}
public void writeValue(OutputStream out) throws IOException {
@ -121,7 +132,7 @@ public class StringChunk extends Chunk {
* and returns the string that that yields.
*/
protected static String parseAs7BitData(byte[] data) {
return parseAs7BitData(data, "CP1252");
return parseAs7BitData(data, DEFAULT_ENCODING);
}
/**
* Parses as non-unicode, supposedly 7 bit data

24
src/scratchpad/testcases/org/apache/poi/hsmf/TestBasics.java
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@ -35,6 +35,7 @@ public final class TestBasics extends TestCase {
private MAPIMessage attachments;
private MAPIMessage noRecipientAddress;
private MAPIMessage cyrillic;
private MAPIMessage chinese;
/**
* Initialize this test, load up the blank.msg mapi message.
@ -48,6 +49,7 @@ public final class TestBasics extends TestCase {
attachments = new MAPIMessage(samples.openResourceAsStream("attachment_test_msg.msg"));
noRecipientAddress = new MAPIMessage(samples.openResourceAsStream("no_recipient_address.msg"));
cyrillic = new MAPIMessage(samples.openResourceAsStream("cyrillic_message.msg"));
chinese = new MAPIMessage(samples.openResourceAsStream("chinese-traditional.msg"));
}
/**
@ -195,5 +197,27 @@ public final class TestBasics extends TestCase {
assertEquals("Cp1251", cyrillic.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
assertEquals("Cp1251", cyrillic.getRecipientDetailsChunks()[1].recipientDisplayNameChunk.get7BitEncoding());
// Override it, check it's taken
cyrillic.set7BitEncoding("UTF-8");
assertEquals("UTF-8", cyrillic.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
assertEquals("UTF-8", cyrillic.getRecipientDetailsChunks()[1].recipientDisplayNameChunk.get7BitEncoding());
// Check with a file that has no headers
try {
chinese.getHeaders();
fail("File doesn't have headers!");
} catch(ChunkNotFoundException e) {}
String html = chinese.getHmtlBody();
assertTrue("Charset not found:\n" + html, html.contains("text/html; charset=big5"));
// Defaults to CP1251
assertEquals("CP1252", chinese.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
// But after guessing goes to the correct one, Big 5
chinese.guess7BitEncoding();
assertEquals("big5", chinese.getRecipientDetailsChunks()[0].recipientDisplayNameChunk.get7BitEncoding());
}
}

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test-data/hsmf/chinese-traditional.msg Normal file
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