Develop Reference

com.google.code.gson cannot parse tamil results

So, I'm trying to fetch JSON results from https://api-thirukkural.vercel.app/api?num=1139 using Java-Telegram-Bot-Api and send it to telegram. I use com.google.code.gson dependency for parsing JSON.
The expected results from API:
{"number":1139,"sect_tam":"காமத்துப்பால்","chapgrp_tam":"களவியல்","chap_tam":"நாணுத் துறவுரைத்தல்","line1":"அறிகிலார் எல்லாரும் என்றேஎன் காமம்","line2":"மறுகின் மறுகும் மருண்டு.","tam_exp":"என்னைத் தவிர யாரும் அறியவில்லை என்பதற்காக என் காதல் தெருவில் பரவி மயங்கித் திரிகின்றது போலும்!","sect_eng":"Love","chapgrp_eng":"The Pre-marital love","chap_eng":"Declaration of Love's special Excellence","eng":"My perplexed love roves public street Believing that none knows its secret","eng_exp":"And thus, in public ways, perturbed will rove"}
Here is a piece of my java code:
String results = "";
Random random = new Random();
SendMessage message = new SendMessage();
String apiUrl = "https://api-thirukkural.vercel.app/api?num=" + random.nextInt(1329 + 1);
try {
URL url = new URL(apiUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
Scanner sc = new Scanner(url.openStream());
while (sc.hasNext()) {
results += sc.nextLine();
}
sc.close();
JSONArray jsonArray = new JSONArray("[" + results + "]");
JSONObject object = jsonArray.getJSONObject(0);
message.setChatId(update.getMessage().getChatId().toString());
message.setText("Number: " + object.getInt("number") + "\n\n" + object.getString("line1") + "\n"
+ object.getString("line2") + "\n\n" + object.getString("tam_exp") + "\n\n" + object.getString("eng_exp"));
conn.disconnect();
execute(message);
} catch (Exception e) {
e.printStackTrace();
}
The result in telegram:
Number: 1139
அறிகிலார� எல�லார�ம� என�றேஎன� காமம�
மற�கின� மற�க�ம� மர�ண�ட�.
என�னைத� தவிர யார�ம� அறியவில�லை என�பதற�காக என� காதல� தெர�வில� பரவி மயங�கித� திரிகின�றத� போல�ம�!
And thus, in public ways, perturbed will rove
Is this a problem in gson dependency? Can someone help me fix this? Thanks.

You need to specify the Charset on Scanner. That is probably the problem.
Example:
new Scanner(url.openStream(), StandardCharsets.UTF_8.name());
You should use the Charset that fits.

Win32Exception: The parameter is incorrect

I am making an application that displays ur saved browser password(s) (right now I'm using Google Chrome) in an easy way. Everytime I run this code I get an error at byte[] newbyte = Crypt32Util.cryptUnprotectData(mybyte);. The code used is written below. This code provides some context. I never had this problem and after some research I can't find a clear solution. I hope someone can help me with it.
Code:
Connection connection = null;
connection = DriverManager.getConnection("jdbc:sqlite:" + path_to_copied_db);
PreparedStatement statement = connection.prepareStatement("SELECT `origin_url`,`username_value`,`password_value` FROM `logins`");
ResultSet re = statement.executeQuery();
StringBuilder builder = new StringBuilder();
while (re.next()) {
String pass = "";
try {
byte[] mybyte = (byte[])re.getBytes("password_value");
byte[] newbyte = Crypt32Util.cryptUnprotectData(mybyte); //Error on this line:71
pass = new String(newbyte);
}catch(Win32Exception e){
e.printStackTrace();
}
builder.append(user + ": " + re.getString("origin_url") + " " + re.getString("username_value") + " " + re.getBinaryStream("password_value") + "\n");
}
Error:
com.sun.jna.platform.win32.Win32Exception: The parameter is incorrect.
at com.sun.jna.platform.win32.Crypt32Util.cryptUnprotectData(Crypt32Util.java:128)
at com.sun.jna.platform.win32.Crypt32Util.cryptUnprotectData(Crypt32Util.java:103)
at com.sun.jna.platform.win32.Crypt32Util.cryptUnprotectData(Crypt32Util.java:90)
at Client.Client.main(Client.java:71)

Issue load webpage after basic auth android

I need to load webpage after basic auth, but the sessionid in my code is not concatenated to url (I get this 10-08 10:17:27.424 20143-20143/com.example.marco.bella D/WebView: loadUrl=https://unimol.esse3.cineca.it/auth/Logon.do;jsessionid=
)...i don't know why...i show you my code!
variable cookie get the correct sessionID.
Thanks in advance!
URL url = null;
try {
url = new URL("https://unimol.esse3.cineca.it/auth/Logon.do");
} catch (MalformedURLException e) {
}
HttpURLConnection httpRequest = null;
try {
httpRequest = (HttpURLConnection) url.openConnection();
} catch (IOException e) {
}
try {
httpRequest.setRequestMethod("GET");
} catch (ProtocolException e) {
}
String cookie = "";
httpRequest.setDoInput(true);
String authString = "user" + ":" + "pass";
byte[] authEncBytes = android.util.Base64.encode(authString.getBytes(), android.util.Base64.DEFAULT);
String authStringEnc = new String(authEncBytes);
httpRequest.addRequestProperty("Authorization", "Basic " + authStringEnc);
System.out.println("auth:" + "" + authStringEnc);
DefaultHttpClient httpclient = new DefaultHttpClient();
List<Cookie> cookies = httpclient.getCookieStore().getCookies();
if (cookies.isEmpty()) {
System.out.println("None");
} else {
for (int i = 0; i < cookies.size(); i++) {
System.out.println("- " + cookies.get(i).toString());
cookie=cookies.get(i).toString();
}
}
webView.loadUrl("https://unimol.esse3.cineca.it/auth/Logon.do;jsessionid="+cookie);

(I get this 10-08 10:17:27.424 20143-20143/com.example.marco.bella
D/WebView:
loadUrl=https://unimol.esse3.cineca.it/auth/Logon.do;jsessionid= )...i
don't know why
The problem I can think of by looking only the portion you have posted here is that you are Overriding cookie variable inside your for loop and there is a high possibility on any iteration of cookies, one or more than 1 cookie exist whose value is blank.
for (int i = 0; i < cookies.size(); i++) {
System.out.println("- " + cookies.get(i).toString());
cookie=cookies.get(i).toString(); // This line is the culprit
}
You should check if the value of the cookie is null or empty.
Replace the culprit line with below line
I am using a utility of Strings class (isNullOrEmpty) of Guava library to check if value is null or empty, you can use your own implementation for this,
if(Strings.isNullOrEmpty(cookies.get(i).toString())) {
continue;
} else {
cookie=cookies.get(i).toString();
}
Now if during iteration you get id which you confirmed that you are getting in console statement then it will definitely get loaded up.

Get specific parts of a string that contains garbage data

So I have these strings that I'm getting that contains a lot of garbage data which i don't want
"http://v20.lscache8.c.youtube.com/videoplayback?id=271de9756065677e&itag=17&ip=0.0.0.0&ipbits=0&expire=999999999999999999"&sparams=ip,ipbits,expireip,ipbits,expire,id,itag&signature=3DCD3F79E045F95B6AF661765F046FB0440FF01606A42661B3AF6BAF046F012549CC9BA34EBC80A9"
So basicly I just want it to search trough the string for videoplayback?id=
*and just copy whats between videoplayback?id= and &
271de9756065677e
and then continue to go trough the string and Grab the signature in the same way
So anyone can help me with the logic and examples how to do this ?

Since your "string that contains garbage data" is actually a URL you should use the URL class
Have a look at the tutorial Parsing a URL
import java.net.*;
import java.io.*;
public class ParseURL {
public static void main(String[] args) throws Exception {
String url = "http://v20.lscache8.c.youtube.com/videoplayback?id=271de9756065677e&itag=17&ip=0.0.0.0&ipbits=0&expire=999999999999999999"&sparams=ip,ipbits,expireip,ipbits,expire,id,itag&signature=3DCD3F79E045F95B6AF661765F046FB0440FF01606A42661B3AF6BAF046F012549CC9BA34EBC80A9";
URL aURL = new URL(url);
System.out.println("protocol = " + aURL.getProtocol());
System.out.println("authority = " + aURL.getAuthority());
System.out.println("host = " + aURL.getHost());
System.out.println("port = " + aURL.getPort());
System.out.println("path = " + aURL.getPath());
System.out.println("query = " + aURL.getQuery());
}
}
The output should be:
protocol = http
authority = v20.lscache8.c.youtube.com:80
host = v20.lscache8.c.youtube.com
port = 80
path = /videoplayback
query = id=271de9756065677e&itag=17&ip=0.0.0.0&ipbits=0&expire=999999999999999999"&sparams=ip,ipbits,expireip,ipbits,expire,id,itag&signature=3DCD3F79E045F95B6AF661765F046FB0440FF01606A42661B3AF6BAF046F012549CC9BA34EBC80A9
In order to parse the query, use URLEncodedUtils
String url = "http://v20.lscache8.c.youtube.com/videoplayback?id=271de9756065677e&itag=17&ip=0.0.0.0&ipbits=0&expire=999999999999999999"&sparams=ip,ipbits,expireip,ipbits,expire,id,itag&signature=3DCD3F79E045F95B6AF661765F046FB0440FF01606A42661B3AF6BAF046F012549CC9BA34EBC80A9";
List<NameValuePair> params = URLEncodedUtils.parse(new URI(url), "UTF-8");
for (NameValuePair param : params) {
System.out.println(param.getName() + "=" + param.getValue());
}
The output should be:
id=271de9756065677e
itag=17
ip=0.0.0.0
ipbits=0
expire=999999999999999999"
sparams=ip,ipbits,expireip,ipbits,expire,id,itag
signature=3DCD3F79E045F95B6AF661765F046FB0440FF01606A42661B3AF6BAF046F012549CC9BA34EBC80A9

Merge two URL in JAVA

I merge two url with the following code.
String strUrl1 = "http://www.domainname.com/path1/2012/04/25/file.php";
String arg = "?page=2";
URL url1;
try {
url1 = new URL(strUrl1);
URL reconUrl1 = new URL(url1,arg);
System.out.println(" url : " + reconUrl1.toString());
} catch (MalformedURLException ex) {
ex.printStackTrace();
}
I'm surprise by the result : http://www.domainname.com/path1/2012/04/25/?page=2
I expect it to be (what browser do) : http://www.domainname.com/path1/2012/04/25/file.php?page=2
Tha javadoc about the constructor URL(URL context, String spec) explain it should respect the RFC.
I'm doing something wrong ?
Thanks
UPDATE :
This is the only problem I encountered with the fonction.
The code already works in all others cases, like browser do
"domain.com/folder/sub" + "/test" -> "domain.com/test"
"domain.com/folder/sub/" + "test" -> "domain.com/folder/sub/test"
"domain.com/folder/sub/" + "../test" -> "domain.com/folder/test"
...

You can always merge the String first and then created the URL based on the merged String.
StringBuffer buf = new StringBuffer();
buf.append(strURL1);
buf.append(arg);
URL url1 = new URL(buf.toString());

try
String k = url1+arg;
URL url1;
try {
url1 = new URL(k);
//URL reconUrl1 = new URL(url1,arg);
System.out.println(" url : " + url1.toString());
} catch (MalformedURLException ex) {
ex.printStackTrace();
}

I haven't read through the RFC, but the context (as mentioned in the Java Doc for URL) is presumably the directory of a URL, which means that the context of
"http://www.domainname.com/path1/2012/04/25/file.php"
is
"http://www.domainname.com/path1/2012/04/25/"
which is why
new URL(url1,arg);
yields
"http://www.domainname.com/path1/2012/04/25/?page=2"
The "workaround" is obviously to concatenate the parts yourself, using +.

you are using the constructor of URL here which takes paramter as URL(URL context, String spec). So you dont pass the php page with the URL but instead with the string. context needs to be the directory. the proper way to do this would be
String strUrl1 = "http://www.domainname.com/path1/2012/04/25";
String arg = "/file.php?page=2";
URL url1;
try {
url1 = new URL(strUrl1);
URL reconUrl1 = new URL(url1,arg);
System.out.println(" url : " + reconUrl1.toString());
} catch (MalformedURLException ex) {
ex.printStackTrace();
}

Try this
String strUrl1 = "http://www.domainname.com/path1/2012/04/25/";
String arg = "file.php?page=2";
URL url1;
try {
url1 = new URL(strUrl1);
URL reconUrl1 = new URL(url1,arg);
System.out.println(" url : " + reconUrl1.toString());
} catch (MalformedURLException ex) {
ex.printStackTrace();
}

When you read the java doc it mentions about the context of the specified URL
Which is the domain and the path:
"http://www.domainname.com" + "/path1/2012/04/25/"
Where "file.php" is considered the text where it belongs to the context mentioned above.
This two parameter overloaded constructor uses the context of a URL as base and adds the second param to create a complete URL, which is not what you need.
So it's better to String add the two parts and then create URL from them:
String contextURL = "http://www.domainname.com/path1/2012/04/25/";
String textURL = "file.php?page=2";
URL url;
try {
url = new URL(contextURL);
URL reconUrl = new URL(url, textURL);
System.out.println(" url : " + reconUrl.toString());
} catch (MalformedURLException murle) {
murle.printStackTrace();
}