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/*
* @(#)MimeMultipart.java 1.31 03/01/29
*/
package com.sun.xml.messaging.saaj.packaging.mime.internet;
import java.io.*;
import javax.activation.DataSource;
import com.sun.xml.messaging.saaj.packaging.mime.*;
import com.sun.xml.messaging.saaj.packaging.mime.util.*;
import com.sun.xml.messaging.saaj.util.FinalArrayList;
import com.sun.xml.messaging.saaj.util.ByteOutputStream;
import com.sun.xml.messaging.saaj.util.SAAJUtil;
/**
* The MimeMultipart class is an implementation
* that uses MIME conventions for the multipart data. <p>
*
* A MimeMultipart is obtained from a MimeBodyPart whose primary type
* is "multipart" (by invoking the part's <code>getContent()</code> method)
* or it can be created by a client as part of creating a new MimeMessage. <p>
*
* The default multipart subtype is "mixed". The other multipart
* subtypes, such as "alternative", "related", and so on, can be
* implemented as subclasses of MimeMultipart with additional methods
* to implement the additional semantics of that type of multipart
* content. The intent is that service providers, mail JavaBean writers
* and mail clients will write many such subclasses and their Command
* Beans, and will install them into the JavaBeans Activation
* Framework, so that any JavaMail implementation and its clients can
* transparently find and use these classes. Thus, a MIME multipart
* handler is treated just like any other type handler, thereby
* decoupling the process of providing multipart handlers from the
* JavaMail API. Lacking these additional MimeMultipart subclasses,
* all subtypes of MIME multipart data appear as MimeMultipart objects. <p>
*
* An application can directly construct a MIME multipart object of any
* subtype by using the <code>MimeMultipart(String subtype)</code>
* constructor. For example, to create a "multipart/alternative" object,
* use <code>new MimeMultipart("alternative")</code>.
*
* @version 1.31, 03/01/29
* @author John Mani
* @author Bill Shannon
* @author Max Spivak
*/
//BM MimeMultipart can extend this
public class MimeMultipart {
/**
* The DataSource supplying our InputStream.
*/
protected DataSource ds = null;
/**
* Have we parsed the data from our InputStream yet?
* Defaults to true; set to false when our constructor is
* given a DataSource with an InputStream that we need to
* parse.
*/
protected boolean parsed = true;
/**
* Vector of MimeBodyPart objects.
*/
protected FinalArrayList parts = new FinalArrayList(); // Holds BodyParts
/**
* This field specifies the content-type of this multipart
* object. It defaults to "multipart/mixed".
*/
protected ContentType contentType;
/**
* The <code>MimeBodyPart</code> containing this <code>MimeMultipart</code>,
* if known.
* @since JavaMail 1.1
*/
protected MimeBodyPart parent;
protected static boolean ignoreMissingEndBoundary = true;
static {
ignoreMissingEndBoundary = SAAJUtil.getSystemBoolean("saaj.mime.multipart.ignoremissingendboundary");
}
/**
* Default constructor. An empty MimeMultipart object
* is created. Its content type is set to "multipart/mixed".
* A unique boundary string is generated and this string is
* setup as the "boundary" parameter for the
* <code>contentType</code> field. <p>
*
* MimeBodyParts may be added later.
*/
public MimeMultipart() {
this("mixed");
}
/**
* Construct a MimeMultipart object of the given subtype.
* A unique boundary string is generated and this string is
* setup as the "boundary" parameter for the
* <code>contentType</code> field. <p>
*
* MimeBodyParts may be added later.
*/
public MimeMultipart(String subtype) {
//super();
/*
* Compute a boundary string.
*/
String boundary = UniqueValue.getUniqueBoundaryValue();
contentType = new ContentType("multipart", subtype, null);
contentType.setParameter("boundary", boundary);
}
/**
* Constructs a MimeMultipart object and its bodyparts from the
* given DataSource. <p>
*
* This constructor handles as a special case the situation where the
* given DataSource is a MultipartDataSource object.
*
* Otherwise, the DataSource is assumed to provide a MIME multipart
* byte stream. The <code>parsed</code> flag is set to false. When
* the data for the body parts are needed, the parser extracts the
* "boundary" parameter from the content type of this DataSource,
* skips the 'preamble' and reads bytes till the terminating
* boundary and creates MimeBodyParts for each part of the stream.
*
* @param ds DataSource, can be a MultipartDataSource
* @param ct
* This must be the same information as {@link DataSource#getContentType()}.
* All the callers of this method seem to have this object handy, so
* for performance reason this method accepts it. Can be null.
*/
public MimeMultipart(DataSource ds, ContentType ct) throws MessagingException {
// 'ds' was not a MultipartDataSource, we have
// to parse this ourself.
parsed = false;
this.ds = ds;
if (ct==null)
contentType = new ContentType(ds.getContentType());
else
contentType = ct;
}
/**
* Set the subtype. This method should be invoked only on a new
* MimeMultipart object created by the client. The default subtype
* of such a multipart object is "mixed". <p>
*
* @param subtype Subtype
*/
public void setSubType(String subtype) {
contentType.setSubType(subtype);
}
/**
* Return the number of enclosed MimeBodyPart objects.
*
* @return number of parts
*/
public int getCount() throws MessagingException {
parse();
if (parts == null)
return 0;
return parts.size();
}
/**
* Get the specified MimeBodyPart. BodyParts are numbered starting at 0.
*
* @param index the index of the desired MimeBodyPart
* @return the MimeBodyPart
* @exception MessagingException if no such MimeBodyPart exists
*/
public MimeBodyPart getBodyPart(int index)
throws MessagingException {
parse();
if (parts == null)
throw new IndexOutOfBoundsException("No such BodyPart");
return (MimeBodyPart)parts.get(index);
}
/**
* Get the MimeBodyPart referred to by the given ContentID (CID).
* Returns null if the part is not found.
*
* @param CID the ContentID of the desired part
* @return the MimeBodyPart
*/
public MimeBodyPart getBodyPart(String CID)
throws MessagingException {
parse();
int count = getCount();
for (int i = 0; i < count; i++) {
MimeBodyPart part = getBodyPart(i);
String s = part.getContentID();
// Old versions of AXIS2 put angle brackets around the content
// id but not the start param
String sNoAngle = (s!= null) ? s.replaceFirst("^<", "").replaceFirst(">$", "")
:null;
if (s != null && (s.equals(CID) || CID.equals(sNoAngle)))
return part;
}
return null;
}
/**
* Update headers. The default implementation here just
* calls the <code>updateHeaders</code> method on each of its
* children BodyParts. <p>
*
* Note that the boundary parameter is already set up when
* a new and empty MimeMultipart object is created. <p>
*
* This method is called when the <code>saveChanges</code>
* method is invoked on the Message object containing this
* MimeMultipart. This is typically done as part of the Message
* send process, however note that a client is free to call
* it any number of times. So if the header updating process is
* expensive for a specific MimeMultipart subclass, then it
* might itself want to track whether its internal state actually
* did change, and do the header updating only if necessary.
*/
protected void updateHeaders() throws MessagingException {
for (int i = 0; i < parts.size(); i++)
((MimeBodyPart)parts.get(i)).updateHeaders();
}
/**
* Iterates through all the parts and outputs each Mime part
* separated by a boundary.
*/
public void writeTo(OutputStream os)
throws IOException, MessagingException {
parse();
String boundary = "--" + contentType.getParameter("boundary");
for (int i = 0; i < parts.size(); i++) {
OutputUtil.writeln(boundary, os); // put out boundary
getBodyPart(i).writeTo(os);
OutputUtil.writeln(os); // put out empty line
}
// put out last boundary
OutputUtil.writeAsAscii(boundary, os);
OutputUtil.writeAsAscii("--", os);
os.flush();
}
/**
* Parse the InputStream from our DataSource, constructing the
* appropriate MimeBodyParts. The <code>parsed</code> flag is
* set to true, and if true on entry nothing is done. This
* method is called by all other methods that need data for
* the body parts, to make sure the data has been parsed.
*
* @since JavaMail 1.2
*/
protected void parse() throws MessagingException {
if (parsed)
return;
InputStream in;
SharedInputStream sin = null;
long start = 0, end = 0;
boolean foundClosingBoundary = false;
try {
in = ds.getInputStream();
if (!(in instanceof ByteArrayInputStream) &&
!(in instanceof BufferedInputStream) &&
!(in instanceof SharedInputStream))
in = new BufferedInputStream(in);
} catch (Exception ex) {
throw new MessagingException("No inputstream from datasource");
}
if (in instanceof SharedInputStream)
sin = (SharedInputStream)in;
String boundary = "--" + contentType.getParameter("boundary");
byte[] bndbytes = ASCIIUtility.getBytes(boundary);
int bl = bndbytes.length;
try {
// Skip the preamble
LineInputStream lin = new LineInputStream(in);
String line;
while ((line = lin.readLine()) != null) {
/*
* Strip trailing whitespace. Can't use trim method
* because it's too aggressive. Some bogus MIME
* messages will include control characters in the
* boundary string.
*/
int i;
for (i = line.length() - 1; i >= 0; i--) {
char c = line.charAt(i);
if (!(c == ' ' || c == '\t'))
break;
}
line = line.substring(0, i + 1);
if (line.equals(boundary))
break;
}
if (line == null)
throw new MessagingException("Missing start boundary");
/*
* Read and process body parts until we see the
* terminating boundary line (or EOF).
*/
boolean done = false;
getparts:
while (!done) {
InternetHeaders headers = null;
if (sin != null) {
start = sin.getPosition();
// skip headers
while ((line = lin.readLine()) != null && line.length() > 0)
;
if (line == null) {
if (!ignoreMissingEndBoundary) {
throw new MessagingException("Missing End Boundary for Mime Package : EOF while skipping headers");
}
// assume there's just a missing end boundary
break getparts;
}
} else {
// collect the headers for this body part
headers = createInternetHeaders(in);
}
if (!in.markSupported())
throw new MessagingException("Stream doesn't support mark");
ByteOutputStream buf = null;
// if we don't have a shared input stream, we copy the data
if (sin == null)
buf = new ByteOutputStream();
int b;
boolean bol = true; // beginning of line flag
// the two possible end of line characters
int eol1 = -1, eol2 = -1;
/*
* Read and save the content bytes in buf.
*/
for (;;) {
if (bol) {
/*
* At the beginning of a line, check whether the
* next line is a boundary.
*/
int i;
in.mark(bl + 4 + 1000); // bnd + "--\r\n" + lots of LWSP
// read bytes, matching against the boundary
for (i = 0; i < bl; i++)
if (in.read() != bndbytes[i])
break;
if (i == bl) {
// matched the boundary, check for last boundary
int b2 = in.read();
if (b2 == '-') {
if (in.read() == '-') {
done = true;
foundClosingBoundary = true;
break; // ignore trailing text
}
}
// skip linear whitespace
while (b2 == ' ' || b2 == '\t')
b2 = in.read();
// check for end of line
if (b2 == '\n')
break; // got it! break out of the loop
if (b2 == '\r') {
in.mark(1);
if (in.read() != '\n')
in.reset();
break; // got it! break out of the loop
}
}
// failed to match, reset and proceed normally
in.reset();
// if this is not the first line, write out the
// end of line characters from the previous line
if (buf != null && eol1 != -1) {
buf.write(eol1);
if (eol2 != -1)
buf.write(eol2);
eol1 = eol2 = -1;
}
}
// read the next byte
if ((b = in.read()) < 0) {
done = true;
break;
}
/*
* If we're at the end of the line, save the eol characters
* to be written out before the beginning of the next line.
*/
if (b == '\r' || b == '\n') {
bol = true;
if (sin != null)
end = sin.getPosition() - 1;
eol1 = b;
if (b == '\r') {
in.mark(1);
if ((b = in.read()) == '\n')
eol2 = b;
else
in.reset();
}
} else {
bol = false;
if (buf != null)
buf.write(b);
}
}
/*
* Create a MimeBody element to represent this body part.
*/
MimeBodyPart part;
if (sin != null)
part = createMimeBodyPart(sin.newStream(start, end));
else
part = createMimeBodyPart(headers, buf.getBytes(), buf.getCount());
addBodyPart(part);
}
} catch (IOException ioex) {
throw new MessagingException("IO Error", ioex);
}
if (!ignoreMissingEndBoundary && !foundClosingBoundary && sin== null) {
throw new MessagingException("Missing End Boundary for Mime Package : EOF while skipping headers");
}
parsed = true;
}
/**
* Create and return an InternetHeaders object that loads the
* headers from the given InputStream. Subclasses can override
* this method to return a subclass of InternetHeaders, if
* necessary. This implementation simply constructs and returns
* an InternetHeaders object.
*
* @param is the InputStream to read the headers from
* @exception MessagingException
* @since JavaMail 1.2
*/
protected InternetHeaders createInternetHeaders(InputStream is)
throws MessagingException {
return new InternetHeaders(is);
}
/**
* Create and return a MimeBodyPart object to represent a
* body part parsed from the InputStream. Subclasses can override
* this method to return a subclass of MimeBodyPart, if
* necessary. This implementation simply constructs and returns
* a MimeBodyPart object.
*
* @param headers the headers for the body part
* @param content the content of the body part
* @since JavaMail 1.2
*/
protected MimeBodyPart createMimeBodyPart(InternetHeaders headers, byte[] content, int len) {
return new MimeBodyPart(headers, content,len);
}
/**
* Create and return a MimeBodyPart object to represent a
* body part parsed from the InputStream. Subclasses can override
* this method to return a subclass of MimeBodyPart, if
* necessary. This implementation simply constructs and returns
* a MimeBodyPart object.
*
* @param is InputStream containing the body part
* @exception MessagingException
* @since JavaMail 1.2
*/
protected MimeBodyPart createMimeBodyPart(InputStream is) throws MessagingException {
return new MimeBodyPart(is);
}
/**
* Setup this MimeMultipart object from the given MultipartDataSource. <p>
*
* The method adds the MultipartDataSource's MimeBodyPart
* objects into this MimeMultipart. This MimeMultipart's contentType is
* set to that of the MultipartDataSource. <p>
*
* This method is typically used in those cases where one
* has a multipart data source that has already been pre-parsed into
* the individual body parts (for example, an IMAP datasource), but
* needs to create an appropriate MimeMultipart subclass that represents
* a specific multipart subtype.
*
* @param mp MimeMultipart datasource
*/
protected void setMultipartDataSource(MultipartDataSource mp)
throws MessagingException {
contentType = new ContentType(mp.getContentType());
int count = mp.getCount();
for (int i = 0; i < count; i++)
addBodyPart(mp.getBodyPart(i));
}
/**
* Return the content-type of this MimeMultipart. <p>
*
* This implementation just returns the value of the
* <code>contentType</code> field.
*
* @return content-type
* @see #contentType
*/
public ContentType getContentType() {
return contentType;
}
/**
* Remove the specified part from the multipart message.
* Shifts all the parts after the removed part down one.
*
* @param part The part to remove
* @return true if part removed, false otherwise
* @exception MessagingException if no such MimeBodyPart exists
*/
public boolean removeBodyPart(MimeBodyPart part) throws MessagingException {
if (parts == null)
throw new MessagingException("No such body part");
boolean ret = parts.remove(part);
part.setParent(null);
return ret;
}
/**
* Remove the part at specified location (starting from 0).
* Shifts all the parts after the removed part down one.
*
* @param index Index of the part to remove
* @exception IndexOutOfBoundsException if the given index
* is out of range.
*/
public void removeBodyPart(int index) {
if (parts == null)
throw new IndexOutOfBoundsException("No such BodyPart");
MimeBodyPart part = (MimeBodyPart)parts.get(index);
parts.remove(index);
part.setParent(null);
}
/**
* Adds a MimeBodyPart to the multipart. The MimeBodyPart is appended to
* the list of existing Parts.
*
* @param part The MimeBodyPart to be appended
*/
public synchronized void addBodyPart(MimeBodyPart part) {
if (parts == null)
parts = new FinalArrayList();
parts.add(part);
part.setParent(this);
}
/**
* Adds a MimeBodyPart at position <code>index</code>.
* If <code>index</code> is not the last one in the list,
* the subsequent parts are shifted up. If <code>index</code>
* is larger than the number of parts present, the
* MimeBodyPart is appended to the end.
*
* @param part The MimeBodyPart to be inserted
* @param index Location where to insert the part
*/
public synchronized void addBodyPart(MimeBodyPart part, int index) {
if (parts == null)
parts = new FinalArrayList();
parts.add(index,part);
part.setParent(this);
}
/**
* Return the <code>MimeBodyPart</code> that contains this <code>MimeMultipart</code>
* object, or <code>null</code> if not known.
* @since JavaMail 1.1
*/
MimeBodyPart getParent() {
return parent;
}
/**
* Set the parent of this <code>MimeMultipart</code> to be the specified
* <code>MimeBodyPart</code>. Normally called by the <code>Message</code>
* or <code>MimeBodyPart</code> <code>setContent(MimeMultipart)</code> method.
* <code>parent</code> may be <code>null</code> if the
* <code>MimeMultipart</code> is being removed from its containing
* <code>MimeBodyPart</code>.
* @since JavaMail 1.1
*/
void setParent(MimeBodyPart parent) {
this.parent = parent;
}
}