mirror of
https://github.com/moparisthebest/k-9
synced 2024-08-13 17:03:48 -04:00
40041ac0e0
+ cut some helper dependencies
164 lines
4.9 KiB
Java
164 lines
4.9 KiB
Java
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package com.fsck.k9.mail.internet;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.nio.charset.Charset;
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import java.util.*;
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public class MimeHeader {
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private static final String[] EMPTY_STRING_ARRAY = new String[0];
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/**
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* Application specific header that contains Store specific information about an attachment.
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* In IMAP this contains the IMAP BODYSTRUCTURE part id so that the ImapStore can later
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* retrieve the attachment at will from the server.
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* The info is recorded from this header on LocalStore.appendMessages and is put back
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* into the MIME data by LocalStore.fetch.
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*/
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public static final String HEADER_ANDROID_ATTACHMENT_STORE_DATA = "X-Android-Attachment-StoreData";
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public static final String HEADER_CONTENT_TYPE = "Content-Type";
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public static final String HEADER_CONTENT_TRANSFER_ENCODING = "Content-Transfer-Encoding";
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public static final String HEADER_CONTENT_DISPOSITION = "Content-Disposition";
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public static final String HEADER_CONTENT_ID = "Content-ID";
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/**
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* Fields that should be omitted when writing the header using writeTo()
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*/
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private static final String[] writeOmitFields = {
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// HEADER_ANDROID_ATTACHMENT_DOWNLOADED,
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// HEADER_ANDROID_ATTACHMENT_ID,
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HEADER_ANDROID_ATTACHMENT_STORE_DATA
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};
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private List<Field> mFields = new ArrayList<Field>();
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private String mCharset = null;
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public void clear() {
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mFields.clear();
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}
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public String getFirstHeader(String name) {
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String[] header = getHeader(name);
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if (header == null) {
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return null;
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}
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return header[0];
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}
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public void addHeader(String name, String value) {
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mFields.add(new Field(name, MimeUtility.foldAndEncode(value)));
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}
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public void setHeader(String name, String value) {
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if (name == null || value == null) {
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return;
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}
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removeHeader(name);
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addHeader(name, value);
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}
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public Set<String> getHeaderNames() {
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Set<String> names = new LinkedHashSet<String>();
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for (Field field : mFields) {
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names.add(field.name);
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}
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return names;
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}
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public String[] getHeader(String name) {
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List<String> values = new ArrayList<String>();
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for (Field field : mFields) {
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if (field.name.equalsIgnoreCase(name)) {
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values.add(field.value);
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}
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}
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if (values.isEmpty()) {
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return null;
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}
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return values.toArray(EMPTY_STRING_ARRAY);
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}
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public void removeHeader(String name) {
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List<Field> removeFields = new ArrayList<Field>();
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for (Field field : mFields) {
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if (field.name.equalsIgnoreCase(name)) {
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removeFields.add(field);
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}
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}
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mFields.removeAll(removeFields);
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}
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public void writeTo(OutputStream out) throws IOException {
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BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out), 1024);
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for (Field field : mFields) {
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if (!Arrays.asList(writeOmitFields).contains(field.name)) {
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String v = field.value;
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if (hasToBeEncoded(v)) {
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Charset charset = null;
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if (mCharset != null) {
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charset = Charset.forName(mCharset);
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}
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v = EncoderUtil.encodeEncodedWord(field.value, charset);
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}
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writer.write(field.name);
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writer.write(": ");
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writer.write(v);
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writer.write("\r\n");
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}
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}
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writer.flush();
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}
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// encode non printable characters except LF/CR/TAB codes.
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private boolean hasToBeEncoded(String text) {
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for (int i = 0; i < text.length(); i++) {
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char c = text.charAt(i);
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if ((c < 0x20 || 0x7e < c) && // non printable
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(c != 0x0a && c != 0x0d && c != 0x09)) { // non LF/CR/TAB
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return true;
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}
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}
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return false;
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}
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private static class Field {
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private final String name;
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private final String value;
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public Field(String name, String value) {
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this.name = name;
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this.value = value;
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}
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder("(");
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sb.append(name).append('=').append(value).append(')');
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return sb.toString();
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}
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}
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public void setCharset(String charset) {
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mCharset = charset;
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}
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@Override
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public MimeHeader clone() {
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MimeHeader header = new MimeHeader();
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header.mCharset = mCharset;
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header.mFields = new ArrayList<Field>(mFields);
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return header;
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}
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}
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