ale46 / mega-java Goto Github PK

When downloading files from Mega, sometimes exceptions like the following occur:

java.io.IOException: Server returned HTTP response code: 500 for URL: https://g.api.mega.co.nz/cs?id=886954536
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1840)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at application.downloader.mega.MegaHandler.api_request(MegaHandler.java:69)
    at application.downloader.mega.MegaHandler.download(MegaHandler.java:138)
    at application.downloader.mega.MegaHandler.download(MegaHandler.java:107)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

org.json.JSONException: A JSONObject text must begin with '{' at 1 [character 2 line 1]
    at org.json.JSONTokener.syntaxError(JSONTokener.java:433)
    at org.json.JSONObject.<init>(JSONObject.java:195)
    at org.json.JSONObject.<init>(JSONObject.java:319)
    at application.downloader.mega.MegaHandler.download(MegaHandler.java:138)
    at application.downloader.mega.MegaHandler.download(MegaHandler.java:107)

This happens for the same file so it's an unreliable download. If possible, please fix this.

Note that the line numbers given are wrong since I slightly edited the code myself as well but that is not the reason for the instability.

Hi,
I have used your api to download files from mega, but I don't want to log in because I only want to download things from mega in java.

How can I realize this?

java.lang.NoClassDefFoundError: org/json/JSONException
Servlet.MegaServlet.doGet(MegaServlet.java:19)
javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:46)
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$36(SecurityContextThreadSetupAction.java:105)
org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$40(UndertowDeploymentInfoService.java:1706)
org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$40(UndertowDeploymentInfoService.java:1706)
org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$40(UndertowDeploymentInfoService.java:1706)
org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$40(UndertowDeploymentInfoService.java:1706)
org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$40(UndertowDeploymentInfoService.java:1706)
io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
io.undertow.server.Connectors.executeRootHandler(Connectors.java:211)
io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:809)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

The base64_url_decode_byte() method does not behave identical on Windows and Linux. On Windows, the amount of separator characters (variable sepCnt) is 0 while for Linux it is 1 for the same input.

Forcing the sepCnt to 0 causes a further exception:
java.lang.StringIndexOutOfBoundsException: String index out of range: 44

I know that this repository is deprecated but I just wanted to let you know about this inconsistency. Maybe you know a fix.

Hello, I see that every time you create the script the file it was destroy and create another one (when you download them), I try to modify some of your code but isn't work.. I use HTTPClient

public void download(String url, String path) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IOException, IllegalBlockSizeException, BadPaddingException, JSONException{
    //TODO DOWNLOAD mismatch?
    print("Download started");
    String[] s = url.split("!");
    String file_id = s[1];
    byte[] file_key = MegaCrypt.base64_url_decode_byte(s[2]); 

    int[] intKey = MegaCrypt.aByte_to_aInt(file_key);
    JSONObject json = new JSONObject();
    try {
        json.put("a", "g");
        json.put("g", "1");
        json.put("p", file_id);
    } catch (JSONException e) {
        e.printStackTrace();
    }

    JSONObject file_data = new JSONObject(api_request(json.toString()));
    int[] keyNOnce = new int[] { intKey[0] ^ intKey[4], intKey[1] ^ intKey[5], intKey[2] ^ intKey[6], intKey[3] ^ intKey[7], intKey[4], intKey[5] };
    byte[] key = MegaCrypt.aInt_to_aByte(keyNOnce[0], keyNOnce[1], keyNOnce[2], keyNOnce[3]);

    int[] iiv = new int[] { keyNOnce[4], keyNOnce[5], 0, 0 };
    byte[] iv = MegaCrypt.aInt_to_aByte(iiv);

    @SuppressWarnings("unused")
    int file_size = file_data.getInt("s");
    String attribs = (file_data.getString("at"));
    attribs = new String(MegaCrypt.aes_cbc_decrypt(MegaCrypt.base64_url_decode_byte(attribs), key));

    String file_name = attribs.substring(10,attribs.lastIndexOf("\""));
    print(file_name);   //Have the real filename
    file_name = URLEncoder.encode(file_name);
    File file = new File(file_name);

    int size = (int) file.length();


    final IvParameterSpec ivSpec = new IvParameterSpec(iv);
    final SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES/CTR/nopadding");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivSpec);

    String file_url = file_data.getString("g");

    FileOutputStream fos = new FileOutputStream(path+File.separator+file_name, true);
    cos = new CipherOutputStream(fos, cipher);

    Cipher decipher = Cipher.getInstance("AES/CTR/NoPadding"); 
    decipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivSpec);

    byte[] buffer;





    print("Last read byte " + size );

    try {


        print(file_url);

        DefaultHttpClient httpClient1 = new DefaultHttpClient();
        HttpGet httpGet1 = new HttpGet(file_url);
        httpGet1.addHeader("Range", "bytes=" + size + "-"); 
        httpGet1.addHeader("Modified", "bytes=" + size + "-");



        HttpResponse httpResponse = httpClient1.execute(httpGet1);

        HttpEntity httpEntity = httpResponse.getEntity();
        InputStream httpInputStream = httpEntity.getContent();

        print("File: " + file.getAbsolutePath());
        int downloaded = size;

      //Sets a new connection to get the real size of the download (because if we get the other one we get a wrong size (download - total) )
        DefaultHttpClient httpSize = new DefaultHttpClient();
        HttpGet httpGetSize = new HttpGet(file_url);
        HttpResponse httpResponseSize = httpSize.execute(httpGetSize);

        int total_size = Integer.parseInt(httpResponseSize.getFirstHeader("Content-Length").getValue());

        if (total_size == size){
            System.out.println("Already downloaded.");

        }else{

            while (true) {

                buffer = new byte[1024];

                int read = httpInputStream.read(buffer);     // Read from server into buffer.
                if (read == -1) //If we get -1 it's EOF.
                    break;

                cos.write(buffer, 0, read);     // Write buffer to file.    

                //cos.flush();

                downloaded += read;
                System.out.println("read bytes: "+downloaded +" (Kb: " + downloaded/1024+")");
            }
        }
    } finally {

            if (fos != null) {
                fos.close();
            }

    }
    print("Download finished");
}

Thanks =)

Nope, File name is now something else.

What I got is: eA9f-fMYfFaNpVbchl44bwRcbfBU

I will stick to the filecreating and split method for now, and once you fixed It I will do a pull request about an idea.

Two methods are missing try catches or throws Exception. I also showed that in the pull request.

Can you add the upload support?

where did you get documentation about the fields a json request should contain?
as instance, here

public String add_user(String email) {
		JSONObject json = new JSONObject();
		try {
			json.put("a", "ur");
			json.put("u", email);
			json.put("l", 1);
		} catch (JSONException e) {
			e.printStackTrace();
		}
		return api_request(json.toString());
}

how do you know those "a","u","l" ? Is there a website or something?
also, I do not need the whole functions from the official sdk; do you think is still possible to send POST and GET requests to them?

If you list all files and create the URL from a file, the key in it is wrong (and too short).