File	Doc	Category	Size	Date	Package
InternetHeaders.java	API Doc	JavaMail 1.4.3	19294	Tue Nov 17 10:38:12 GMT 2009	javax.mail.internet

InternetHeaders

• java.lang.Object

Fields Summary

protected List

headers The actual list of Headers, including placeholder entries. Placeholder entries are Headers with a null value and are never seen by clients of the InternetHeaders class. Placeholder entries are used to keep track of the preferred order of headers. Headers are never actually removed from the list, they're converted into placeholder entries. New headers are added after existing headers of the same name (or before in the case of Received and Return-Path headers). If no existing header or placeholder for the header is found, new headers are added after the special placeholder with the name ":".

Constructors Summary
public InternetHeaders() Create an empty InternetHeaders object. Placeholder entries are inserted to indicate the preferred order of headers. headers = new ArrayList(40); headers.add(new InternetHeader("Return-Path", null)); headers.add(new InternetHeader("Received", null)); headers.add(new InternetHeader("Resent-Date", null)); headers.add(new InternetHeader("Resent-From", null)); headers.add(new InternetHeader("Resent-Sender", null)); headers.add(new InternetHeader("Resent-To", null)); headers.add(new InternetHeader("Resent-Cc", null)); headers.add(new InternetHeader("Resent-Bcc", null)); headers.add(new InternetHeader("Resent-Message-Id", null)); headers.add(new InternetHeader("Date", null)); headers.add(new InternetHeader("From", null)); headers.add(new InternetHeader("Sender", null)); headers.add(new InternetHeader("Reply-To", null)); headers.add(new InternetHeader("To", null)); headers.add(new InternetHeader("Cc", null)); headers.add(new InternetHeader("Bcc", null)); headers.add(new InternetHeader("Message-Id", null)); headers.add(new InternetHeader("In-Reply-To", null)); headers.add(new InternetHeader("References", null)); headers.add(new InternetHeader("Subject", null)); headers.add(new InternetHeader("Comments", null)); headers.add(new InternetHeader("Keywords", null)); headers.add(new InternetHeader("Errors-To", null)); headers.add(new InternetHeader("MIME-Version", null)); headers.add(new InternetHeader("Content-Type", null)); headers.add(new InternetHeader("Content-Transfer-Encoding", null)); headers.add(new InternetHeader("Content-MD5", null)); headers.add(new InternetHeader(":", null)); headers.add(new InternetHeader("Content-Length", null)); headers.add(new InternetHeader("Status", null));
public InternetHeaders(InputStream is) Read and parse the given RFC822 message stream till the blank line separating the header from the body. The input stream is left positioned at the start of the body. The header lines are stored internally. For efficiency, wrap a BufferedInputStream around the actual input stream and pass it as the parameter. No placeholder entries are inserted; the original order of the headers is preserved. param is RFC822 input stream headers = new ArrayList(40); load(is);

Methods Summary
public void	addHeader(java.lang.String name, java.lang.String value) Add a header with the specified name and value to the header list. The current implementation knows about the preferred order of most well-known headers and will insert headers in that order. In addition, it knows that Received headers should be inserted in reverse order (newest before oldest), and that they should appear at the beginning of the headers, preceeded only by a possible Return-Path header. Note that RFC822 headers can only contain US-ASCII characters. param name header name param value header value int pos = headers.size(); boolean addReverse = name.equalsIgnoreCase("Received") || name.equalsIgnoreCase("Return-Path"); if (addReverse) pos = 0; for (int i = headers.size() - 1; i >= 0; i--) { InternetHeader h = (InternetHeader)headers.get(i); if (name.equalsIgnoreCase(h.getName())) { if (addReverse) { pos = i; } else { headers.add(i + 1, new InternetHeader(name, value)); return; } } // marker for default place to add new headers if (!addReverse && h.getName().equals(":")) pos = i; } headers.add(pos, new InternetHeader(name, value));
public void	addHeaderLine(java.lang.String line) Add an RFC822 header line to the header store. If the line starts with a space or tab (a continuation line), add it to the last header line in the list. Otherwise, append the new header line to the list. Note that RFC822 headers can only contain US-ASCII characters param line raw RFC822 header line try { char c = line.charAt(0); if (c == ' " || c == '\t") { InternetHeader h = (InternetHeader)headers.get(headers.size() - 1); h.line += "\r\n" + line; } else headers.add(new InternetHeader(line)); } catch (StringIndexOutOfBoundsException e) { // line is empty, ignore it return; } catch (NoSuchElementException e) { // XXX - vector is empty? }
public java.util.Enumeration	getAllHeaderLines() Return all the header lines as an Enumeration of Strings. return (getNonMatchingHeaderLines(null));
public java.util.Enumeration	getAllHeaders() Return all the headers as an Enumeration of {@link javax.mail.Header} objects. return Header objects return (new matchEnum(headers, null, false, false));
public java.lang.String[]	getHeader(java.lang.String name) Return all the values for the specified header. The values are String objects. Returns null if no headers with the specified name exist. param name header name return array of header values, or null if none Iterator e = headers.iterator(); // XXX - should we just step through in index order? List v = new ArrayList(); // accumulate return values while (e.hasNext()) { InternetHeader h = (InternetHeader)e.next(); if (name.equalsIgnoreCase(h.getName()) && h.line != null) { v.add(h.getValue()); } } if (v.size() == 0) return (null); // convert List to an array for return String r[] = new String[v.size()]; r = (String[])v.toArray(r); return (r);
public java.lang.String	getHeader(java.lang.String name, java.lang.String delimiter) Get all the headers for this header name, returned as a single String, with headers separated by the delimiter. If the delimiter is null, only the first header is returned. Returns null if no headers with the specified name exist. param name header name param delimiter delimiter return the value fields for all headers with this name, or null if none String s[] = getHeader(name); if (s == null) return null; if ((s.length == 1) || delimiter == null) return s[0]; StringBuffer r = new StringBuffer(s[0]); for (int i = 1; i < s.length; i++) { r.append(delimiter); r.append(s[i]); } return r.toString();
public java.util.Enumeration	getMatchingHeaderLines(java.lang.String[] names) Return all matching header lines as an Enumeration of Strings. return (new matchEnum(headers, names, true, true));
public java.util.Enumeration	getMatchingHeaders(java.lang.String[] names) Return all matching {@link javax.mail.Header} objects. return matching Header objects return (new matchEnum(headers, names, true, false));
public java.util.Enumeration	getNonMatchingHeaderLines(java.lang.String[] names) Return all non-matching header lines return (new matchEnum(headers, names, false, true));
public java.util.Enumeration	getNonMatchingHeaders(java.lang.String[] names) Return all non-matching {@link javax.mail.Header} objects. return non-matching Header objects return (new matchEnum(headers, names, false, false));
public void	load(java.io.InputStream is) Read and parse the given RFC822 message stream till the blank line separating the header from the body. Store the header lines inside this InternetHeaders object. The order of header lines is preserved. Note that the header lines are added into this InternetHeaders object, so any existing headers in this object will not be affected. Headers are added to the end of the existing list of headers, in order. param is RFC822 input stream // Read header lines until a blank line. It is valid // to have BodyParts with no header lines. String line; LineInputStream lis = new LineInputStream(is); String prevline = null; // the previous header line, as a string // a buffer to accumulate the header in, when we know it's needed StringBuffer lineBuffer = new StringBuffer(); try { //while ((line = lis.readLine()) != null) { do { line = lis.readLine(); if (line != null && (line.startsWith(" ") || line.startsWith("\t"))) { // continuation of header if (prevline != null) { lineBuffer.append(prevline); prevline = null; } lineBuffer.append("\r\n"); lineBuffer.append(line); } else { // new header if (prevline != null) addHeaderLine(prevline); else if (lineBuffer.length() > 0) { // store previous header first addHeaderLine(lineBuffer.toString()); lineBuffer.setLength(0); } prevline = line; } } while (line != null && line.length() > 0); } catch (IOException ioex) { throw new MessagingException("Error in input stream", ioex); }
public void	removeHeader(java.lang.String name) Remove all header entries that match the given name param name header name for (int i = 0; i < headers.size(); i++) { InternetHeader h = (InternetHeader)headers.get(i); if (name.equalsIgnoreCase(h.getName())) { h.line = null; //headers.remove(i); //i--; // have to look at i again } }
public void	setHeader(java.lang.String name, java.lang.String value) Change the first header line that matches name to have value, adding a new header if no existing header matches. Remove all matching headers but the first. Note that RFC822 headers can only contain US-ASCII characters param name header name param value header value boolean found = false; for (int i = 0; i < headers.size(); i++) { InternetHeader h = (InternetHeader)headers.get(i); if (name.equalsIgnoreCase(h.getName())) { if (!found) { int j; if (h.line != null && (j = h.line.indexOf(':")) >= 0) { h.line = h.line.substring(0, j + 1) + " " + value; // preserves capitalization, spacing } else { h.line = name + ": " + value; } found = true; } else { headers.remove(i); i--; // have to look at i again } } } if (!found) { addHeader(name, value); }