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How to Change an Attachment File Name for James Mailet

I am working on a project in which a James mailet receives a message with an attachment with a long file name, and the name needs to be changed to something shorter when delivering it to its destination. This is to meet a specific requirement.
javax.mail.internet.MimeMessage msg = mail.getMessage();
// Change file name.
String contentType = msg.getContentType();
System.out.println("content type: " + contentType);
if (contentType != null && contentType.contains("multipart")) {
try {
Multipart multipart = (Multipart) msg.getContent();
int totalNumberOfBodyParts = multipart.getCount();
for (int i = 0; i < totalNumberOfBodyParts; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
String bodyPartFileName = bodyPart.getFileName();
if (bodyPartFileName != null && !bodyPartFileName.isEmpty() && !"null".equalsIgnoreCase(bodyPartFileName)) {
System.out.println(" bodyPartFileName: " + bodyPartFileName);
if (bodyPartFileName.length() > 12) {
// Get the file name suffix.
int index = bodyPartFileName.lastIndexOf('.');
if(index > 0) {
multipart.removeBodyPart(bodyPart);
String extension = bodyPartFileName.substring(index + 1); // Everything past the dot.
// Get new file name.
String newFilePrefix = bodyPartFileName.substring(index - 8, index).replace("-", "_");
String newFileName = (newFilePrefix + "." + extension).toUpperCase();
System.out.println(" Proposed file name: " + newFileName);
// Set the new file name.
bodyPart.setFileName(newFileName);
// Replace existing body part with the one that has the new file name.
multipart.addBodyPart(bodyPart, i);
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
}
// Attempting to save the changes just made to the file name.
msg.saveChanges();
// This is to show that the file name change did not save.
if (contentType != null && contentType.contains("multipart")) {
try {
Multipart multipart = (Multipart) msg.getContent();
int totalNumberOfBodyParts = multipart.getCount();
for (int i = 0; i < totalNumberOfBodyParts; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
String bodyPartFileName = bodyPart.getFileName();
if (bodyPartFileName != null && !bodyPartFileName.isEmpty() && !"null".equalsIgnoreCase(bodyPartFileName)) {
// The name does not seem to have changed.
System.out.println(" bodyPartFileName after attempted change: " + bodyPartFileName);
}
}
} catch (IOException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
}
No stack traces are being produced. So I assume that no exceptions are being thrown when calling setFileName().
How can I change the name of the attachment before sending the message to its destination?

Russian language causing IOException

I'm making the bot for Google Dictionary using this API https://dictionaryapi.dev/. It's supposed to show word definitions in different languages. And the bot works just fine for English and Spanish. But there's an IOException every time I put in Russian words. What can be the cause of it?
Here's my Bot class.
Bot.java:
public void onUpdateReceived(Update update) {
//Model model = new Model();
WordModel wordModel = new WordModel();
Message message = update.getMessage();
if (message != null && message.hasText())
{
switch (message.getText()) {
case "/english":
DictionaryEntry.setLanguage("en");
sendMsg(message, DictionaryEntry.getLanguage());
break;
case "/russian":
DictionaryEntry.setLanguage("ru");
sendMsg(message, DictionaryEntry.getLanguage());
break;
case "/spanish":
DictionaryEntry.setLanguage("es");
sendMsg(message, DictionaryEntry.getLanguage());
break;
default:
if (!message.getText().contains("/")) {
try {
sendMsgs(message, DictionaryEntry.getWords(message.getText(), wordModel));
} catch (IOException e) {
sendMsg(message, "Не найдено");
sendMsg(message, DictionaryEntry.getUrl().toString());
}
}
break;
}
}
}
public void sendMsg(Message message, String text) {
SendMessage sendMessage = new SendMessage();
sendMessage.setChatId(message.getChatId());
sendMessage.setReplyToMessageId(message.getMessageId());
sendMessage.setText(text);
try {
//setButtons(sendMessage);
execute(sendMessage);
} catch (TelegramApiException e) {
e.printStackTrace();
}
}
public void sendMsgs(Message message, List<String> words) {
for (int i = 0; i < words.size(); i++) {
SendMessage sendMessage = new SendMessage();
sendMessage.setChatId(message.getChatId());
sendMessage.setReplyToMessageId(message.getMessageId());
sendMessage.setText(words.get(i));
try {
//setButtons(sendMessage);
execute(sendMessage);
} catch (TelegramApiException e) {
e.printStackTrace();
}
}
}
And here's my DictionaryEntry class where I process JSON string that I get from URL.
DictionaryEntry.java:
private static String language = "ru";
public static String getLanguage() {
return language;
}
public static void setLanguage(String language) {
DictionaryEntry.language = language;
}
public static URL getUrl() {
return url;
}
private static URL url;
public static List<String> getWords(String message, WordModel wordModel) throws IOException {
url = new URL("https://api.dictionaryapi.dev/api/v2/entries/"
+ DictionaryEntry.getLanguage() + "/" + message);
Scanner in = new Scanner((InputStream) url.getContent());
String result = "";
while (in.hasNext())
{
result += in.nextLine();
}
String result2 = result.replaceAll("\"", "\\\"");
List<WordModel> models = new ArrayList<>();
List<String> results = new ArrayList<>();
int count = 0;
try {
JSONArray mainArray = new JSONArray(result2);
for (int i = 0; i < mainArray.length(); i++) {
JSONObject wordEntry = mainArray.getJSONObject(i);
String wordName = wordEntry.getString("word");
wordModel.setWord(wordName);
JSONArray meaningsArray = wordEntry.getJSONArray("meanings");
for (int j = 0; j < meaningsArray.length(); j++) {
JSONObject meaningEntry = meaningsArray.getJSONObject(j);
JSONArray definitionsArray = meaningEntry.getJSONArray("definitions");
for (int k = 0; k < definitionsArray.length(); k++) {
//count++;
JSONObject definitionEntry = definitionsArray.getJSONObject(k);
String definition = definitionEntry.getString("definition");
wordModel.setDefinition(definition);
if (definitionEntry.has("example")) {
count++;
String example = definitionEntry.getString("example");
wordModel.setExample(example);
}
else {
wordModel.setExample("No examples found");
}
models.add(wordModel);
results.add("Word: " + wordModel.getWord() + "\n\n" +
"Definition: " + wordModel.getDefinition() + "\n\n" +
"Example: " + wordModel.getExample());
}
}
}
/*result = "Word: " + wordModel.getWord() + "\n\n" +
"Definition: " + wordModel.getDefinition() + "\n\n" +
"Example: " + wordModel.getExample();*/
} catch (JSONException e) {
count = 50;
}
results.add(url.toString());
return results;
}
Here's the stack trace:
java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.dictionaryapi.dev/api/v2/entries/ru/мышь
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1932)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1528)
at java.base/java.net.URLConnection.getContent(URLConnection.java:749)
at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getContent(HttpsURLConnectionImpl.java:404)
at java.base/java.net.URL.getContent(URL.java:1181)
at DictionaryEntry.getWords(DictionaryEntry.java:73)
at Bot.onUpdateReceived(Bot.java:91)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.telegram.telegrambots.meta.generics.LongPollingBot.onUpdatesReceived(LongPollingBot.java:27)
at org.telegram.telegrambots.updatesreceivers.DefaultBotSession$HandlerThread.run(DefaultBotSession.java:321)

+ URLEncoder.encode(message, "UTF-8")
You are sending a HTTP request. The URL should be appropriate for the used encoding.
There are more aspects of using the right charset/encoding, but this might already be sufficient. The site probably uses UTF-8, as that can handle the full Unicode range.
400 is BAD REQUEST.
url = new URL("https://api.dictionaryapi.dev/api/v2/entries/"
+ DictionaryEntry.getLanguage() + "/"
+ URLEncoder.encode(message, "UTF-8"));
And
Scanner in = new Scanner((InputStream) url.getContent(),
StandardCharsets.UTF_8);
StringBuilder sb = new StringBuilder();
while (in.hasNextLine())
{
sb.append(in.nextLine()).append('\n');
}
String result = sb.toString();

Check in your environment that the file was in utf-8u format Because Cyrillic may not be supported

How to fix input getting cut off by output

So, I'm trying to create a function (If not pretty) IRC client using no libraries, written in Java. I've gotten almost everything working, the only problem is that I'm currently getting user input using System.in. And if someone else in the channel sends a message while I'm in the middle of typing, it cuts off what I currently have, and I need to guess where I am in the string. I want to know if there's a way to separate user input from the output of the program, so that this doesn't happen. This is the code in question:
new Thread(() -> {
while(connected[0]) {
String output = sc.nextLine();
if(!output.startsWith("~") && !output.startsWith("/")) {
try {
writeToSocket("PRIVMSG " + focused[0] + " " + output);
} catch (IOException e) {
e.printStackTrace();
}
}
if(output.substring(1).toLowerCase().startsWith("quit")) {
String[] split = output.substring(5).split(" ");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < split.length; i++) {
if(i == 0) {
sb.append(split[i]);
}
sb.append(" ").append(split[i]);
}
try {
writeToSocket("QUIT " + sb.toString());
connected[0] = false;
} catch (IOException e) {
e.printStackTrace();
}
}else if(output.substring(1).toLowerCase().startsWith("focus")) {
String get = output.substring(7);
if(!channels.contains(get)) {
print("Not connected to channel");
}else {
try {
writeToSocket("PART " + focused[0]);
writeToSocket("JOIN " + get);
} catch (IOException e) {
e.printStackTrace();
}
focused[0] = get;
}
}else if(output.substring(1).toLowerCase().startsWith("join")) {
String get = output.substring(6);
channels.add(get);
}
if(output.startsWith("/") && output.substring(1).toLowerCase().startsWith("msg")) {
String[] split = output.substring(5).split(" ");
String username = split[0];
StringBuilder msg = new StringBuilder();
for(int i = 1; i < split.length; i++) {
if(i == 1) {
msg.append(split[i]);
continue;
}
msg.append(" ").append(split[i]);
}
try {
writeToSocket("PRIVMSG " + username + " " + msg.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
}
}).start();

Creating a jsp search form to run a java Search program

The background info here is that I have a working Indexer and Search (in java) that indexes and searches a file directory for the filenames and then copies the files to a "Results" Directory.
What I need/ don't have much experience in is writing jsp files. I need the jsp file to have a search bar for the text and then a search button. When text is entered in the bar, and the button is clicked, I need it to run my search program with the entered text as an arg.
I have added the IndexFiles and the SearchFiles classes for reference.
Please explain with a good example if you can help out!
public class SearchFiles {
static File searchDirectory = new File(
"C:\\Users\\flood.j.2\\Desktop\\IndexSearch\\Results");
static String v = new String();
static String path = null;
String title = null;
File addedFile = null;
OutputStream out = null;
String dirName = "C:\\Users\\flood.j.2\\Desktop\\IndexSearch\\Results";
public static void main(String[] args) throws Exception {
String usage = "Usage:\tjava org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-query string]";
if (args.length > 0
&& ("-h".equals(args[0]) || "-help".equals(args[0]))) {
System.out.println(usage);
System.exit(0);
}
for (int j = 5; j < args.length; j++) {
v += args[j] + " ";
}
String index = "index";
String field = "contents";
String queries = null;
boolean raw = false;
String queryString = null;
int hits = 100;
for (int i = 0; i < args.length; i++) {
if ("-index".equals(args[i])) {
index = args[i + 1];
i++;
} else if ("-field".equals(args[i])) {
field = args[i + 1];
i++;
} else if ("-queries".equals(args[i])) {
queries = args[i + 1];
i++;
} else if ("-query".equals(args[i])) {
queryString = v;
i++;
}
}
IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(
index)));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);
BufferedReader in = null;
if (queries != null) {
in = new BufferedReader(new InputStreamReader(new FileInputStream(
queries), "UTF-8"));
} else {
in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
}
QueryParser parser = new QueryParser(Version.LUCENE_40, field, analyzer);
for (int m = 0; m < 2; m++) {
if (queries == null && queryString == null) {
System.out.println("Enter query: ");
}
String line = queryString != null ? queryString : in.readLine();
if (line == null || line.length() == -1) {
break;
}
line = line.trim();
if (line.length() == 0) {
break;
}
Query query = parser.parse(line);
System.out.println("Searching for: " + query.toString(field));
doPagingSearch(in, searcher, query, hits, raw, queries == null
&& queryString == null);
if (queryString == null) {
break;
}
}
reader.close();
}
public static void doPagingSearch(BufferedReader in,
IndexSearcher searcher, Query query, int hitsPerPage, boolean raw,
boolean interactive) throws IOException {
// Collect enough docs to show 500 pages
TopDocs results = searcher.search(query, 5 * hitsPerPage);
ScoreDoc[] hits = results.scoreDocs;
int numTotalHits = results.totalHits;
System.out.println(numTotalHits + " total matching documents");
int start = 0;
int end = Math.min(numTotalHits, hitsPerPage);
FileUtils.deleteDirectory(searchDirectory);
while (true) {
for (int i = start; i < end; i++) {
Document doc = searcher.doc(hits[i].doc);
path = doc.get("path");
if (path != null) {
System.out.println((i + 1) + ". " + path);
File addFile = new File(path);
try {
FileUtils.copyFileToDirectory(addFile, searchDirectory);
} catch (IOException e) {
e.printStackTrace();
}
}
}
if (!interactive || end == 0) {
break;
}
System.exit(0);
}
}
}
public class IndexFiles {
private IndexFiles() {
}
public static void main(String[] args) {
String usage = "java org.apache.lucene.demo.IndexFiles"
+ " [-index INDEX_PATH] [-docs DOCS_PATH] [-update]\n\n"
+ "This indexes the documents in DOCS_PATH, creating a Lucene index"
+ "in INDEX_PATH that can be searched with SearchFiles";
String indexPath = null;
String docsPath = null;
boolean create = true;
for (int i = 0; i < args.length; i++) {
if ("-index".equals(args[i])) {
indexPath = args[i + 1];
i++;
} else if ("-docs".equals(args[i])) {
docsPath = args[i + 1];
i++;
} else if ("-update".equals(args[i])) {
create = false;
}
}
if (docsPath == null) {
System.err.println("Usage: " + usage);
System.exit(1);
}
final File docDir = new File(docsPath);
if (!docDir.exists() || !docDir.canRead()) {
System.out
.println("Document directory '"
+ docDir.getAbsolutePath()
+ "' does not exist or is not readable, please check the path");
System.exit(1);
}
Date start = new Date();
try {
System.out.println("Indexing to directory '" + indexPath + "'...");
Directory dir = FSDirectory.open(new File(indexPath));
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40,
analyzer);
if (create) {
iwc.setOpenMode(OpenMode.CREATE);
} else {
iwc.setOpenMode(OpenMode.CREATE_OR_APPEND);
}
IndexWriter writer = new IndexWriter(dir, iwc);
indexDocs(writer, docDir);
writer.close();
Date end = new Date();
System.out.println(end.getTime() - start.getTime()
+ " total milliseconds");
} catch (IOException e) {
System.out.println(" caught a " + e.getClass()
+ "\n with message: " + e.getMessage());
}
}
static void indexDocs(IndexWriter writer, File file) throws IOException {
if (file.canRead()) {
if (file.isDirectory()) {
String[] files = file.list();
if (files != null) {
for (int i = 0; i < files.length; i++) {
indexDocs(writer, new File(file, files[i]));
}
}
} else {
FileInputStream fis;
try {
fis = new FileInputStream(file);
} catch (FileNotFoundException fnfe) {
return;
}
try {
Document doc = new Document();
Field pathField = new StringField("path",
file.getAbsolutePath(), Field.Store.YES);
doc.add(pathField);
doc.add(new LongField("modified", file.lastModified(),
Field.Store.NO));
doc.add(new TextField("title", file.getName(), null));
System.out.println(pathField);
if (writer.getConfig().getOpenMode() == OpenMode.CREATE) {
System.out.println("adding " + file);
writer.addDocument(doc);
} else {
System.out.println("updating " + file);
writer.updateDocument(new Term("path", file.getPath()),
doc);
}
} finally {
fis.close();
}
}
}
}
}

First, you should definitely do this in a servlet rather than a JSP. Putting lots of logic in JSP is bad practice. (See the servlets info page).
Second, it would probably be better on performance to make a cronjob (Linux) or Task (Windows) to run the search program every hour and store the results in a database and just have your servlet pull from there rather than allow the user to initiate the search program.

Type mismatch: cannot convert from String to XmlResourceParser

I'm attempting to read and parse a bit of XML from my internal storage:
private void readXML() {
XmlResourceParser p = Environment.getExternalStorageDirectory()
+ File.separator + "BootConfiguration";
try {
int nextEvent = p.next();
while (nextEvent != XmlPullParser.START_TAG) {
nextEvent = p.next();
}
processTag(p, p.getName(), new XMLCollector());
} catch (XmlPullParserException e) {
bootconfig = "ERROR: Failed to parse XML!\n" + e;
} catch (IOException e) {
bootconfig = "ERROR: IOException!\n" + e;
} finally {
p.close();
}
// TO-DO remove later
TextView t = (TextView) findViewById(R.id.bootconfig);
t.setText(bootconfig);
}
However I'm getting an error stating: "Type mismatch: cannot convert from String to XmlResourceParser" on the line:
XmlResourceParser p = Environment.getExternalStorageDirectory()
I've tried changing the XmlResourceParser to a String (as eclipse suggests) however this simply causes more errors further in the code.
EDIT:
I attempted a shot at the method shown in the first answer below and ended up with this:
private void readXML() {
// XmlPullParser p = Environment.getExternalStorageDirectory()
// + File.separator + "JvsBootConfiguration";
//
InputStream istr = this.getAssets().open(Environment.getExternalStorageDirectory()
+ File.separator + "JvsBootConfiguration");
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
p = factory.newPullParser();
p.setInput(istr, "UTF-8");
try {
int nextEvent = p.next();
while (nextEvent != XmlPullParser.START_TAG) {
nextEvent = p.next();
}
processTag(p, p.getName(), new XMLCollector());
} catch (XmlPullParserException e) {
bootconfig = "ERROR: Failed to parse XML!\n" + e;
} catch (IOException e) {
bootconfig = "ERROR: IOException!\n" + e;
} finally {
p.close();
}
However I'm not sure exactly how I should define p (until I figure that out I'm left with 'p cannot be resolved to a variable')

Environment.getExternalStorageDirectory() + File.separator + "BootConfiguration";
returns a String.
You cannot assign a String to a XmlResourceParser.
XmlResourceParser p = "some/directory";
is equivalent to trying to assign:
int number = "some text";
You cannot miss-match types like that.
In your case you need to call a function that returns a XmlResourceParser.
Try:
android: how to load xml file from assets directory?
or
Create xml on the fly from a string