I'm creating a plugin for eclipse that takes JSON from the Web of Trust API and prints it into the console. I was able to print the entire JSON but when I try to get specific information, it will not show up in the plugin console.
try {
JSONObject json = readJsonFromUrl("http://api.mywot.com/0.4/public_link_json2?hosts=google.com/&key=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
JSONObject msg = (JSONObject) json.getJSONObject("google.com").getJSONObject("categories");
String[] parts = msg.toString().split(",");
String[] parts2 = parts[1].split(":");
// System.out.println("Score:" + parts2[0]);
//System.out.println("Score:" + parts2[0]);
//print result
MessageConsoleStream out = ConsoleManager.getMessageConsoleStream( "Console" );
out.println("Score:" + msg.toString());
}
catch (Exception e) {
}
return null;
}
private static String readAll(Reader rd) throws IOException {
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
return sb.toString();
}
public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
InputStream is = new URL(url).openStream();
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
String jsonText = readAll(rd);
JSONObject json = new JSONObject(jsonText);
return json;
} finally {
is.close();
}
}
ConsoleManager Class:
public class ConsoleManager {
public static MessageConsole findConsole( String name ) {
ConsolePlugin plugin = ConsolePlugin.getDefault();
IConsoleManager conMan = plugin.getConsoleManager();
IConsole[] existing = conMan.getConsoles();
for ( int i = 0; i < existing.length; i++ )
if ( name.equals( existing[i].getName() ) ) return ( MessageConsole ) existing[i];
//no console found, so create a new one
MessageConsole myConsole = new MessageConsole( name, null );
conMan.addConsoles( new IConsole[]{myConsole} );
return myConsole;
}
public static MessageConsoleStream getMessageConsoleStream( String name ) {
MessageConsole myConsole = findConsole( name );
MessageConsoleStream out = myConsole.newMessageStream();
return out;
}
}
So I'm trying to print the value from the JSON stored in parts2, however when I try to print it to the plugin console, it doesn't show anything. No errors so I think I'm missing something.
Any help is greatly appreciated.
Is your console the one that is currently being shown?
You probably want to call IConsoleManager.showConsoleView(console) to show your console.
Related
I want to use Java export Oracle database, and obtain the export status(indicates success or failure), if the operation failed, should return the reason why failed.
But I have trouble in this problem, the export is success,but the label I defined is always false and return [].
What should I do to get the true status or obtain the failure details.
public class DumpFile {
/**
* Default constructor
*/
public DumpFile() {
}
/**
* #return
* #throws InterruptedException
*/
public static boolean LoadToOracle(String Path) throws InterruptedException {
String importStr = "imp scott/tiger#orcl file="+Path+" full=y ignore=y";
Process process_oracle = null;
boolean flag = false;
List<String[]> processListOracle = new ArrayList<String[]>();
try {
process_oracle = Runtime.getRuntime().exec(importStr);
process_oracle.waitFor();
BufferedReader input = new BufferedReader(new InputStreamReader(
process_oracle.getInputStream(), "utf8"));
String line = "";
while ((line = input.readLine()) != null) {
System.out.println(line);
String[] content = line.split("\n");
processListOracle.add(content);
}
int exevalue = process_oracle.waitFor();
System.out.println("exevalue:"+exevalue);
input.close();
} catch (Exception e) {
e.printStackTrace();
}
for (String[] line : processListOracle)
for (String temp : line) {
if (temp.trim().equals("successfully"))
flag = true;
}
return flag;
}
public static String exportFromOracle(String FileName) throws InterruptedException {
String Path="/home/oracle/output/";
String exportStr = "exp scott/tiger#orcl file="+Path+FileName;
Process process_oracle = null;
boolean flag = false;
List<String[]> processListOracle = new ArrayList<String[]>();
try {
process_oracle = Runtime.getRuntime().exec(exportStr);
BufferedReader input = new BufferedReader(new InputStreamReader(
process_oracle.getInputStream(), "utf8"));
String line = "";
while ((line = input.readLine()) != null) {
System.out.println("line:"+line);
String[] content = line.split("\n");
processListOracle.add(content);
}
int exevalue = process_oracle.waitFor();
System.out.println("exevalue:"+exevalue);
input.close();
} catch (Exception e) {
e.printStackTrace();
}
for (String[] line : processListOracle)
for (String temp : line) {
if (temp.trim().equals("successfully"))
flag = true;
}
System.out.println("flag:"+flag);
if (flag==true)
return flag+"test"+Path;
else{
for (String[] line : processListOracle)
System.out.println(line);
}
return processListOracle.toString();
}
public static void main(String[] args) throws Exception {
String a=exportFromOracle("test.dmp");
System.out.println("a.isEmpty:"+a.isEmpty());
System.out.println(a);
}
}
OUTPUT:
exevalue:0
a.isEmpty:false
[]
I have solved this problem by "log file", I use imp export the database and output the log file, then I use Java to read the log file, to obtain the status.
I'm trying to build a very basic weather app in android studio. I am using AsyncClass to return multiple strings.
As you can see in the code, I used a class named "Wrapper" that is used to store my strings so I can just return a class object and use it in the onPostExecute method of the AsyncTask. The problem I am facing is that when I test the app, all of the returned Strings somehow are undefined (the default for the Wrapper class). This means the strings are not being updated in the doInBackground method and I can't seem to figure out why!
My Activity
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i(MainActivity.class.getSimpleName(), "Can't connect to Google Play Services!");
}
private class Wrapper
{
String Temperature = "UNDEFINED";
String city = "UNDEFINED";
String country = "UNDEFINED";
}
private class GetWeatherTask extends AsyncTask<String, Void, Wrapper> {
private TextView textView;
public GetWeatherTask(TextView textView) {
this.textView = textView;
}
#Override
protected Wrapper doInBackground(String... strings) {
Wrapper w = new Wrapper();
String Temperature = "x";
String city = "y";
String country = "z";
try {
URL url = new URL(strings[0]);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
InputStream stream = new BufferedInputStream(urlConnection.getInputStream());
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
StringBuilder builder = new StringBuilder();
String inputString;
while ((inputString = bufferedReader.readLine()) != null) {
builder.append(inputString);
}
JSONObject topLevel = new JSONObject(builder.toString());
JSONObject main = topLevel.getJSONObject("main");
JSONObject cityobj = topLevel.getJSONObject("city");
Temperature = String.valueOf(main.getDouble("temp"));
city = cityobj.getString("name");
country = cityobj.getString("country");
w.Temperature= Temperature;
w.city= city;
w.country=country;
urlConnection.disconnect();
} catch (IOException | JSONException e) {
e.printStackTrace();
}
return w;
}
#Override
protected void onPostExecute(Wrapper w) {
textView.setText("Current Temperature: " + w.Temperature + " C" + (char) 0x00B0
+"\n" + "Current Location: "+ w.country +"\n" + "City: "+ w.city );
}
}
}
UPDATE:
turned out that that I was using the wrong url in my code,I was using :
http://api.openweathermap.org/data/2.5/weather?lat=%f&lon=%f&units=%s&appid=%s
Instead I should've been using:
http://api.openweathermap.org/data/2.5/forecast?lat=%f&lon=%f&units=%s&appid=%s
-aka instead of weather I should've been using forcast
Your error starts here
JSONObject main = topLevel.getJSONObject("main");
Probably because the topLevel object has no "main" key.
{
"city":{ },
"cod":"200",
"message":0.1859,
"cnt":40,
"list":[ ]
}
Throw your JSON into here. https://jsonformatter.curiousconcept.com/
You'll notice that there are many, many "main" keys that are within the "list" element, but you have to parse those starting from getJSONArray("list").
Basically, something like this
String city = "undefined";
String country = "undefined";
List<Double> temperatures = new ArrayList<Double>();
try {
JSONObject object = new JSONObject(builder.toString());
JSONObject jCity = object.getJSONObject("city");
city = jCity.getString("name");
country = jCity.getString("country");
JSONArray weatherList = object.getJSONArray("list");
for (int i = 0; i < weatherList.length(); i++) {
JSONObject listObject = weatherList.getJSONObject(i);
double temp = listObject.getJSONObject("main").getDouble("temp");
temperatures.add(temp);
}
} catch (JSONException e) {
e.printStackTrace();
}
return new Wrapper(city, country, temperatures);
After studying your code, either your try block is failing, which is returning your object, but empty, or there is something wrong with your JSON parsing. If you could show us the JSON you are trying to parse that would be a great help.
That being said, the fact that it is still showing as "UNDEFINED" is because that is how you initialised it, and becuase (the JSON parse is likely failing), the object is being returned in an un-edited state.
EDIT:
You are parsing the JSON wrong. You are trying to find an object called "main" in the top directory, however the main object only exists inside of an array called list!
Please look here for a more easy to see and visual representation: http://prntscr.com/dlhlrk
You can use this site to help visualise your JSON and create an appropriate soluton based upon it. https://jsonformatter.curiousconcept.com/
Looking at the API you posted earlier (api.openweathermap.org) you are trying to access variables that don't exist. I suggest you have a look at what the API returns and try getting the variables one by one if you are getting a JSONException
EDIT:
What API you are using? In your initial post you said it was http://api.openweathermap.org/data/2.5/weather but in a comment above you said it was http://api.openweathermap.org/data/2.5/forecast.
If you're using the weather API (as initially stated) you can use the below:
#Override
protected Wrapper doInBackground(String... strings) {
Wrapper w = new Wrapper();
try {
URL url = new URL(strings[0]);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
InputStream stream = new BufferedInputStream(urlConnection.getInputStream());
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
StringBuilder builder = new StringBuilder();
String inputString;
while ((inputString = bufferedReader.readLine()) != null) {
builder.append(inputString);
}
Log.d("JSON", builder.toString());
JSONObject topLevel = new JSONObject(builder.toString());
JSONObject main = topLevel.getJSONObject("main");
JSONObject sys = topLevel.getJSONObject("sys");
w.Temperature = String.valueOf(main.getDouble("temp"));
w.city = topLevel.getString("name");
w.country = sys.getString("country");
urlConnection.disconnect();
} catch (IOException | JSONException e) {
e.printStackTrace();
}
return w;
}
it's my first question here, i've try to be the more explicit :)
I want get value from a JSON page : https://api.dailymotion.com/video/x3p6d9r?fields=onair.
I have follow a tutorial about json object.
But i want get the value "onair" and put this in a String for use a IF STRING == "XX".
This is my code :
public class notification extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_notification);
detectonline();
}
public void detectonline(){
/*
if (xx == "false") {
Do something is live is off
}
else{
Do something is live is on
}
*/
}
public static boolean checkIfOnline(String channel) throws IOException {
String channerUrl = "https://api.dailymotion.com/video/x3p6d9r?fields=onair";
String jsonText = readFromUrl(channerUrl);// reads text from URL
JsonParser parser = new JsonParser();
JsonObject json = parser.parse(jsonText).getAsJsonObject();
return !json.get("onair").isJsonNull();
}
private static String readFromUrl(String url) throws IOException {
URL page = new URL(url);
StringBuilder sb = new StringBuilder();
Scanner scanner = null;
try{
//scanner = new Scanner(page.openStream(), StandardCharsets.UTF_8.name());
scanner = new Scanner(page.openStream());
while (scanner.hasNextLine()){
sb.append(scanner.nextLine());
}
}finally{
if (scanner!=null)
scanner.close();
}
return sb.toString();
}
}
I remake your method according what you are looking for it's one of several way to parse json data :
public static boolean checkIfOnline(String channel) throws JSONException, IOException {
String channerUrl = "https://api.dailymotion.com/video/x3p6d9r?fields=onair";
String jsonText = readFromUrl(channerUrl);// reads text from URL
JSONObject json = new JSONObject(jsonText); // You create a json object from your string jsonText
if(json.has("onair")) { // just a simple test to check the node that you need existe
boolean value = json.getBoolean("onair"); // In the url that you gave onair value is boolean type
return value;
}
return false;
}
I will create methode using your way !
public static boolean checkIfOnline(String channel) throws IOException {
String channerUrl = "https://api.dailymotion.com/video/x3p6d9r?fields=onair";
String jsonText = readFromUrl(channerUrl);// reads text from URL
JsonParser parser = new JsonParser();
String myString =json.get("onair");
return mystring;}
I am extracting the post details of a facebook page. I extracted the json of a particular page and now I have to get id of all the posts of that page. How can I do it using facebook4j.
private static String readpage(Reader rd) throws IOException
{
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1)
{
sb.append((char) cp);
}
return sb.toString();
}
public static JSONObject readurl(String url) throws IOException, JSONException
{
InputStream is = new URL(url).openStream();
try
{
BufferedReader rd = new BufferedReader(new InputStreamReader
(is, Charset.forName("UTF-8")));
String jsonText = readpage(rd);
JSONObject json = new JSONObject(jsonText);
return json;
}
finally
{
is.close();
}
}
public static void main(String[] args) throws
IOException, JSONException, FacebookException
{
JSONObject json = readurl("https://graph.facebook.com/"+s);
}
You can obtain all the post related information of a particular page by referring the following code :
ResponseList<Post> results = facebook.getPosts(searchPost);
String userId = "";
for (Post post : results) {
obj.put("Post Id", post.getId());
obj.put("Post message", post.getMessage());
obj.put("No of likes on Post", post.getLikes().size());
obj.put("Post owner name:", post.getFrom().getName());
objArray = new JSONArray();
where obj is a JSON object.
PS:I am using eclipse kepler and facebook4j-core-2.0.2
I want to get google contacts in my Blackberry Application. Is there any public libraries availabile for blackberry to do this?
I try to use Oauth-SignPost. But the libraies used in it not supported by blackberry.Then I try the following code
public static String requestToken(){
String url = C.REQUEST_URL;
String header = oauth_header(url, HttpProtocolConstants.HTTP_METHOD_GET);
String requestTokenUrl = concatURL(url, header);
HttpConnection httpConn = null;
InputStream input = null;
try{
HttpConnectionFactory factory = new HttpConnectionFactory( requestTokenUrl,
HttpConnectionFactory.TRANSPORT_WIFI |
HttpConnectionFactory.TRANSPORT_WAP2 |
HttpConnectionFactory.TRANSPORT_BIS |
HttpConnectionFactory.TRANSPORT_BES |
HttpConnectionFactory.TRANSPORT_DIRECT_TCP);
httpConn = factory.getNextConnection();
httpConn.setRequestMethod(HttpProtocolConstants.HTTP_METHOD_GET);
httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
input = httpConn.openDataInputStream();
int resp = httpConn.getResponseCode();
if (resp == HttpConnection.HTTP_OK) {
StringBuffer buffer = new StringBuffer();
int ch;
while ( (ch = input.read()) != -1){
buffer.append( (char) ch);
}
String content = buffer.toString();
System.out.println("Response"+content);
}
return "";
} catch (IOException e) {
return "exception";
} catch (NoMoreTransportsException nc) {
return "noConnection";
} finally {
try {
httpConn.close();
input.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
The oauth_header() which create the appending parameters
public static String oauth_header(String url, String method) {
String nonce = nonce();
long timestamp = timestamp();
Hashtable pairs = new Hashtable();
pairs.put(C.OAUTH_CONSUMER_KEY, C.CONSUMER_KEY);
pairs.put(C.OAUTH_NONCE, nonce);
pairs.put(C.OAUTH_SIGNATURE_METHOD, C.SIGNATURE_METHOD);
pairs.put(C.OAUTH_TIMESTAMP, Long.toString(timestamp));
pairs.put(C.OAUTH_SCOPE,C.SCOPE);
pairs.put(C.OAUTH_VERSION, "1.0");
String sig = signature(method, url, pairs);
StringBuffer header_sb = new StringBuffer();
header_sb.append(C.OAUTH_CONSUMER_KEY).append("=").append(C.CONSUMER_KEY).append(",");
header_sb.append(C.OAUTH_NONCE).append("=").append(nonce).append(",");
header_sb.append(C.OAUTH_SIGNATURE).append("=").append(URLUTF8Encoder.encode(sig)).append(",");
header_sb.append(C.OAUTH_SIGNATURE_METHOD).append("=").append(C.SIGNATURE_METHOD).append(",");
header_sb.append(C.OAUTH_TIMESTAMP).append("=").append(Long.toString(timestamp)).append(",");
header_sb.append(C.OAUTH_SCOPE).append("=").append(C.SCOPE);
header_sb.append(C.OAUTH_VERSION).append("=").append("1.0");
return header_sb.toString();
}
Signature() and concatUrl() here
private static String signature(String method, String requestURL, Hashtable pairs) {
StringBuffer sb = new StringBuffer();
String[] keys = new String[pairs.size()];
Enumeration e = pairs.keys();
int i = 0;
while(e.hasMoreElements()) {
String k = (String)e.nextElement();
keys[i++] = k + "=" + URLUTF8Encoder.encode((String)pairs.get(k));
}
Arrays.sort(keys, new Comparator() {
public int compare(Object arg0, Object arg1) {
return ((String)arg0).compareTo((String)arg1);
}
});
for(i = 0; i < keys.length; i++) {
sb.append(keys[i]).append('&');
}
sb.deleteCharAt(sb.length()-1);
String msg = method.toUpperCase() +"&" + URLUTF8Encoder.encode(requestURL) + "&" + URLUTF8Encoder.encode(sb.toString());
System.out.println(msg);
StringBuffer key = new StringBuffer();
if(C.CONSUMER_SECRET != null) key.append(URLUTF8Encoder.encode(C.CONSUMER_SECRET));
key.append('&');
/* if(Const.tokenSecret != null){
key.append(URLUTF8Encoder.encode(Const.tokenSecret));
}*/
try {
return hmacsha1(key.toString(), msg);
} catch (Exception ex) {
return null;
}
}
private static String hmacsha1(String key, String message)
throws CryptoTokenException, CryptoUnsupportedOperationException, IOException {
HMACKey k = new HMACKey(key.getBytes());
HMAC hmac = new HMAC(k, new SHA1Digest());
hmac.update(message.getBytes());
byte[] mac = hmac.getMAC();
return Base64OutputStream.encodeAsString(mac, 0, mac.length, false, false);
}
public static String concatURL(String url, String header){
String newurl=url;
header = header.replace(',', '&');
newurl = newurl+"?"+header;
return newurl;
}
Then I get the signature_invalid Message. please Help me to find out the error.