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package com.sun.mail.mbox;
import javax.mail.*;
import javax.mail.internet.*;
import andx.activation.*;
import java.util.*;
import java.io.*;
import com.sun.mail.util.LineInputStream;
/**
* The SunV3Multipart class is an implementation of the abstract Multipart
* class that uses SunV3 conventions for the multipart data. <p>
*
* @author Bill Shannon
*/
public class SunV3Multipart extends MimeMultipart {
private boolean parsing;
/**
* Constructs a SunV3Multipart object and its bodyparts from the
* given DataSource. <p>
*
* @param ds DataSource, can be a MultipartDataSource
*/
public SunV3Multipart(DataSource ds) throws MessagingException {
super(ds);
}
/**
* Set the subtype. Throws MethodNotSupportedException.
*
* @param subtype Subtype
*/
public void setSubType(String subtype) throws MessagingException {
throw new MethodNotSupportedException(
"can't change SunV3Multipart subtype");
}
/**
* Get the BodyPart referred to by the given ContentID (CID).
* Throws MethodNotSupportException.
*/
public synchronized BodyPart getBodyPart(String CID)
throws MessagingException {
throw new MethodNotSupportedException(
"SunV3Multipart doesn't support Content-ID");
}
/**
* Update headers. Throws MethodNotSupportException.
*/
protected void updateHeaders() throws MessagingException {
throw new MethodNotSupportedException("SunV3Multipart not writable");
}
/**
* Iterates through all the parts and outputs each SunV3 part
* separated by a boundary.
*/
public void writeTo(OutputStream os)
throws IOException, MessagingException {
throw new MethodNotSupportedException(
"SunV3Multipart writeTo not supported");
}
private static final String boundary = "----------";
/*
* Parse the contents of this multipart message and create the
* child body parts.
*/
protected synchronized void parse() throws MessagingException {
/*
* If the data has already been parsed, or we're in the middle of
* parsing it, there's nothing to do. The latter will occur when
* we call addBodyPart, which will call parse again. We really
* want to be able to call super.super.addBodyPart.
*/
if (parsed || parsing)
return;
InputStream in = null;
try {
in = ds.getInputStream();
if (!(in instanceof ByteArrayInputStream) &&
!(in instanceof BufferedInputStream))
in = new BufferedInputStream(in);
} catch (IOException ex) {
throw new MessagingException("No inputstream from datasource");
} catch (RuntimeException ex) {
throw new MessagingException("No inputstream from datasource");
}
String line;
int bl = boundary.length();
byte[] bndbytes = new byte[bl];
boundary.getBytes(0, bl, bndbytes, 0);
parsing = true;
try {
/*
* Skip any kind of junk until we get to the first
* boundary line.
*/
LineInputStream lin = new LineInputStream(in);
while ((line = lin.readLine()) != null) {
if (line.trim().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).
*/
for (;;) {
/*
* Collect the headers for this body part.
*/
InternetHeaders headers = new InternetHeaders(in);
if (!in.markSupported())
throw new MessagingException("Stream doesn't support mark");
ByteArrayOutputStream buf = new ByteArrayOutputStream();
int b;
/*
* Read and save the content bytes in buf.
*/
while ((b = in.read()) >= 0) {
if (b == '\r' || b == '\n') {
/*
* Found the end of a line, check whether the
* next line is a boundary.
*/
int i;
in.mark(bl + 4 + 1); // "4" for possible "--\r\n"
if (b == '\r' && in.read() != '\n') {
in.reset();
in.mark(bl + 4);
}
// read bytes, matching against the boundary
for (i = 0; i < bl; i++)
if (in.read() != bndbytes[i])
break;
if (i == bl) {
int b2 = in.read();
// check for end of line
if (b2 == '\n')
break; // got it! break out of the while loop
if (b2 == '\r') {
in.mark(1);
if (in.read() != '\n')
in.reset();
break; // got it! break out of the while loop
}
}
// failed to match, reset and proceed normally
in.reset();
}
buf.write(b);
}
/*
* Create a SunV3BodyPart to represent this body part.
*/
SunV3BodyPart body =
new SunV3BodyPart(headers, buf.toByteArray());
addBodyPart(body);
if (b < 0)
break;
}
} catch (IOException e) {
throw new MessagingException("IO Error"); // XXX
} finally {
parsing = false;
}
parsed = true;
}
}