Example usage for java.net HttpURLConnection getInputStream

Introduction

In this page you can find the example usage for java.net HttpURLConnection getInputStream.

Prototype

public InputStream getInputStream() throws IOException 

Source Link

Document

Returns an input stream that reads from this open connection.

Usage

From source file:com.chiorichan.util.WebUtils.java

/**
 * Opens an HTTP connection to a web URL and tests that the response is a valid 200-level code
 * and we can successfully open a stream to the content.
 * //from w ww .  j  a  v  a2  s .  c om
 * @param url
 *            The HTTP URL indicating the location of the content.
 * @return True if the content can be accessed successfully, false otherwise.
 */
public static boolean pingHttpURL(String url) {
    InputStream stream = null;
    try {
        final HttpURLConnection conn = openHttpConnection(new URL(url));
        conn.setConnectTimeout(10000);

        int responseCode = conn.getResponseCode();
        int responseFamily = responseCode / 100;

        if (responseFamily == 2) {
            stream = conn.getInputStream();
            IOUtils.closeQuietly(stream);
            return true;
        } else {
            return false;
        }
    } catch (IOException e) {
        return false;
    } finally {
        IOUtils.closeQuietly(stream);
    }
}

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From source file:edu.dartmouth.cs.dartcard.HttpUtilities.java

public static String get(String endpoint, Map<String, String> params) {
    URL url = null;//from w  ww  .  jav a 2 s.com
    try {
        url = new URL(endpoint);
    } catch (MalformedURLException e) {
        //Fail silently
    }

    byte[] bytes = constructParams(params);

    HttpURLConnection conn;

    long backoff = BACKOFF_MILLI_SECONDS + random.nextInt(1000);
    for (int i = 1; i <= HttpUtilities.MAX_ATTEMPTS; i++) {
        try {
            conn = makeGetConnection(url, bytes);

            // handle the response
            int status = conn.getResponseCode();

            if (status == 200) {

                BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line + "\n");
                }
                br.close();

                if (null != conn) {
                    conn.disconnect();
                }

                return sb.toString();
            }

            else if (500 > status) {
                if (null != conn) {
                    conn.disconnect();
                }
                return null;
            }
        } catch (IOException e) {
            try {
                Thread.sleep(backoff);
            } catch (InterruptedException e1) {
                // Activity finished before we complete - exit.
                Thread.currentThread().interrupt();
            }
            // increase backoff exponentially
            backoff *= 2;
        }
    }
    return null;
}

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From source file:com.appsimobile.appsii.module.weather.loader.YahooWeatherApiClient.java

@Nullable
public static CircularArray<WeatherData> getWeatherForWoeids(CircularArray<String> woeids, String unit)
        throws CantGetWeatherException {

    if (woeids == null || woeids.isEmpty())
        return null;

    HttpURLConnection connection = null;
    try {/*from   ww  w  .  ja  v  a  2 s.  c o m*/
        String url = buildWeatherQueryUrl(woeids, unit);
        if (BuildConfig.DEBUG)
            Log.d("YahooWeatherApiClient", "loading weather from: " + url);

        connection = Utils.openUrlConnection(url);

        CircularArray<WeatherData> result = new CircularArray<>();
        WeatherDataParser.parseWeatherData(result, connection.getInputStream(), woeids);

        return result;
    } catch (JSONException | ResponseParserException | ParseException | IOException | NumberFormatException e) {
        throw new CantGetWeatherException(true, R.string.no_weather_data, "Error parsing weather feed XML.", e);
    } finally {
        if (connection != null) {
            connection.disconnect();
        }
    }
}

---

From source file:com.github.thorqin.webapi.oauth2.OAuthClient.java

public static AccessToken obtainAccessTokenByCode(String authorityServerUri, String clientId,
        String clientSecret, String code, String redirectUri, boolean useBasicAuthentication)
        throws IOException, OAuthException {
    String rawData = makeObtainAccessTokenByCode(clientId, clientSecret, code, redirectUri,
            useBasicAuthentication);/*from w  ww. j a  v a  2  s  .  co  m*/
    String type = "application/x-www-form-urlencoded";
    URL u = new URL(authorityServerUri);
    HttpURLConnection conn = (HttpURLConnection) u.openConnection();
    conn.setDoOutput(true);
    if (useBasicAuthentication) {
        String basicAuthentication = Base64.encodeBase64String((clientId + ":" + clientSecret).getBytes());
        conn.setRequestProperty("Authorization", "Basic " + basicAuthentication);
    }
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Content-Type", type);
    conn.setRequestProperty("Content-Length", String.valueOf(rawData.length()));
    try (OutputStream os = conn.getOutputStream()) {
        os.write(rawData.getBytes());
    }
    try (InputStream is = conn.getInputStream(); InputStreamReader reader = new InputStreamReader(is)) {
        AccessTokenResponse token = Serializer.fromJson(reader, AccessTokenResponse.class);
        if (token.error != null) {
            throw new OAuthException(token.error, token.errorDescription, token.errorUri);
        }
        return token;
    }
}

---

From source file:edu.dartmouth.cs.dartcard.HttpUtilities.java

/**
 * Issue a POST request to the server, and return the results from it as a string
 * /*from  ww  w.  java2s.c  om*/
 * @param endpoint
 *            POST address.
 * @param params
 *            request parameters.
 * 
 * @throws IOException
 *             propagated from POST.
 */
public static String postForResults(String endpoint, Map<String, String> params) {
    URL url = null;
    try {
        url = new URL(endpoint);
    } catch (MalformedURLException e) {
        //Fail silently
    }

    byte[] bytes = constructParams(params);

    HttpURLConnection conn;

    long backoff = BACKOFF_MILLI_SECONDS + random.nextInt(1000);
    for (int i = 1; i <= HttpUtilities.MAX_ATTEMPTS; i++) {
        try {
            conn = makePostConnection(url, bytes);

            // handle the response
            int status = conn.getResponseCode();

            if (status == 200) {

                BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line + "\n");
                }
                br.close();

                if (null != conn) {
                    conn.disconnect();
                }

                return sb.toString();
            }

            else if (500 > status) {
                if (null != conn) {
                    conn.disconnect();
                }
                return null;
            }
        } catch (IOException e) {
            try {
                Thread.sleep(backoff);
            } catch (InterruptedException e1) {
                // Activity finished before we complete - exit.
                Thread.currentThread().interrupt();
            }
            // increase backoff exponentially
            backoff *= 2;
        }
    }

    return null;
}

---

From source file:a122016.rr.com.alertme.QueryUtils.java

/**
 * Make an HTTP request to the given URL and return a String as the response.
 */// ww w.  ja v  a  2s.  c  o  m
private static String makeHttpRequest(URL url) throws IOException {
    String jsonResponse = "";

    // If the URL is null, then return early.
    if (url == null) {
        return jsonResponse;
    }

    HttpURLConnection urlConnection = null;
    InputStream inputStream = null;
    try {
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setReadTimeout(10000 /* milliseconds */);
        urlConnection.setConnectTimeout(15000 /* milliseconds */);
        urlConnection.setRequestMethod("GET");
        urlConnection.connect();

        // If the request was successful (response code 200),
        // then read the input stream and parse the response.
        if (urlConnection.getResponseCode() == 200) {
            inputStream = urlConnection.getInputStream();
            jsonResponse = readFromStream(inputStream);
        } else {
            Log.e(LOG_TAG, "Error response code: " + urlConnection.getResponseCode());
        }
    } catch (IOException e) {
        Log.e(LOG_TAG, "Problem retrieving the Places JSON results.", e);
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
        if (inputStream != null) {
            // Closing the input stream could throw an IOException, which is why
            // the makeHttpRequest(URL url) method signature specifies than an IOException
            // could be thrown.
            inputStream.close();
        }
    }
    return jsonResponse;
}

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From source file:com.openforevent.main.UserPosition.java

public static Map<String, Object> userLocationProperties(DispatchContext ctx,
        Map<String, ? extends Object> context) throws IOException {
    Delegator delegator = ctx.getDelegator();
    LocalDispatcher dispatcher = ctx.getDispatcher();
    String visitId = (String) context.get("visitId");

    if (Debug.infoOn()) {
        Debug.logInfo("In userLocationProperties", module);
    }/*  ww w .j  a  v  a2s.c om*/

    // get user coords
    coordsOfUserPosition(ctx, context);

    URL url = new URL(
            "https://graph.facebook.com/search?since=now&limit=4&q=2012-05-07&type=event&access_token="
                    + "AAACEdEose0cBAN9CB2ErxVN3JvK2gsrLslPt6e6Y7hJ0OrMEkMoyNwvHgSZCAEu2lCHZALlVWXZCW5JL8asMWoaPN3UAXFpZBsJJ6SvXRAAIZAXeTo0fD");
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

    // Set properties of the connection
    urlConnection.setRequestMethod("GET");
    urlConnection.setDoInput(true);
    urlConnection.setDoOutput(true);
    urlConnection.setUseCaches(false);
    urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

    // Retrieve the output
    int responseCode = urlConnection.getResponseCode();
    InputStream inputStream;
    if (responseCode == HttpURLConnection.HTTP_OK) {
        inputStream = urlConnection.getInputStream();
    } else {
        inputStream = urlConnection.getErrorStream();
    }

    StringWriter writer = new StringWriter();
    IOUtils.copy(inputStream, writer, "UTF-8");
    String theString = writer.toString();

    Debug.logInfo("Facebook stream = ", theString);

    if (theString.contains("AuthException") == true) {
        url = new URL("https://graph.facebook.com/oauth/access_token?" + "client_id=   283576871735609&"
                + "client_secret=   5cf1fe4e531dff8de228bfac61b8fdfa&" + "grant_type=fb_exchange_token&"
                + "fb_exchange_token="
                + "AAACEdEose0cBAN9CB2ErxVN3JvK2gsrLslPt6e6Y7hJ0OrMEkMoyNwvHgSZCAEu2lCHZALlVWXZCW5JL8asMWoaPN3UAXFpZBsJJ6SvXRAAIZAXeTo0fD");

        HttpURLConnection urlConnection1 = (HttpURLConnection) url.openConnection();

        // Set properties of the connection
        urlConnection1.setRequestMethod("GET");
        urlConnection1.setDoInput(true);
        urlConnection1.setDoOutput(true);
        urlConnection1.setUseCaches(false);
        urlConnection1.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        // Retrieve the output
        int responseCode1 = urlConnection1.getResponseCode();
        InputStream inputStream1;
        if (responseCode == HttpURLConnection.HTTP_OK) {
            inputStream1 = urlConnection1.getInputStream();
        } else {
            inputStream1 = urlConnection1.getErrorStream();
        }

        StringWriter writer1 = new StringWriter();
        IOUtils.copy(inputStream1, writer1, "UTF-8");
        String theString1 = writer1.toString();

        Debug.logInfo("Facebook stream1 = ", theString1);

    }

    Map<String, Object> paramOut = FastMap.newInstance();
    paramOut.put("geoName", "aaa");
    paramOut.put("abbreviation", "bbb");
    return paramOut;

}

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From source file:com.fastbootmobile.encore.api.common.HttpGet.java

/**
 * Downloads the data from the provided URL.
 * @param inUrl The URL to get from/*  ww w . j  a  v a  2 s .  co  m*/
 * @param query The query field. '?' + query will be appended automatically, and the query data
 *              MUST be encoded properly.
 * @return A byte array of the data
 */
public static byte[] getBytes(String inUrl, String query, boolean cached)
        throws IOException, RateLimitException {
    final String formattedUrl = inUrl + (query.isEmpty() ? "" : ("?" + query));

    Log.d(TAG, "Formatted URL: " + formattedUrl);

    URL url = new URL(formattedUrl);
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.setRequestProperty("User-Agent", "OmniMusic/1.0-dev (http://www.omnirom.org)");
    urlConnection.setUseCaches(cached);
    urlConnection.setInstanceFollowRedirects(true);
    int maxStale = 60 * 60 * 24 * 28; // tolerate 4-weeks stale
    urlConnection.addRequestProperty("Cache-Control", "max-stale=" + maxStale);
    try {
        final int status = urlConnection.getResponseCode();
        // MusicBrainz returns 503 Unavailable on rate limit errors. Parse the JSON anyway.
        if (status == HttpURLConnection.HTTP_OK) {
            InputStream in = new BufferedInputStream(urlConnection.getInputStream());
            int contentLength = urlConnection.getContentLength();
            if (contentLength <= 0) {
                // No length? Let's allocate 100KB.
                contentLength = 100 * 1024;
            }
            ByteArrayBuffer bab = new ByteArrayBuffer(contentLength);
            BufferedInputStream bis = new BufferedInputStream(in);
            int character;

            while ((character = bis.read()) != -1) {
                bab.append(character);
            }
            return bab.toByteArray();
        } else if (status == HttpURLConnection.HTTP_NOT_FOUND) {
            // 404
            return new byte[] {};
        } else if (status == HttpURLConnection.HTTP_FORBIDDEN) {
            return new byte[] {};
        } else if (status == HttpURLConnection.HTTP_UNAVAILABLE) {
            throw new RateLimitException();
        } else if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM
                || status == 307 /* HTTP/1.1 TEMPORARY REDIRECT */
                || status == HttpURLConnection.HTTP_SEE_OTHER) {
            // We've been redirected, follow the new URL
            final String followUrl = urlConnection.getHeaderField("Location");
            Log.e(TAG, "Redirected to: " + followUrl);
            return getBytes(followUrl, "", cached);
        } else {
            Log.e(TAG, "Error when fetching: " + formattedUrl + " (" + urlConnection.getResponseCode() + ")");
            return new byte[] {};
        }
    } finally {
        urlConnection.disconnect();
    }
}

---

From source file:com.fluidops.iwb.luxid.LuxidExtractor.java

public static String useLuxidWS(String input, String token, String outputFormat, String annotationPlan)
        throws Exception {
    String s = "<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsd="
            + "\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"> "
            + "<SOAP-ENV:Body> <ns1:annotateString xmlns:ns1=\"http://luxid.temis.com/ws/types\"> "
            + "<ns1:sessionKey>" + token + "</ns1:sessionKey> <ns1:plan>" + annotationPlan
            + "</ns1:plan> <ns1:data>";

    s += input;// "This is a great providing test";

    s += "</ns1:data> <ns1:consumer>" + outputFormat + "</ns1:consumer> </ns1:annotateString> </SOAP-ENV:Body> "
            + "</SOAP-ENV:Envelope>";

    URL url = new URL("http://193.104.205.28//LuxidWS/services/Annotation");

    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);//  ww  w  .  ja v  a 2 s  . c om

    conn.getOutputStream().write(s.getBytes());

    StringBuilder res = new StringBuilder();

    if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
        InputStream stream = conn.getInputStream();

        InputStreamReader read = new InputStreamReader(stream);
        BufferedReader rd = new BufferedReader(read);

        String line = "";

        StringEscapeUtils.escapeHtml("");
        while ((line = rd.readLine()) != null) {
            res.append(line);
        }
        rd.close();
    }
    //      res = URLDecoder.decode(res, "UTF-8");
    return StringEscapeUtils.unescapeHtml(res.toString().replace("&amp;lt", "<"));
}

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From source file:gov.nasa.arc.geocam.geocam.HttpPost.java

public static String postFiles(String url, Map<String, String> vars, Map<String, File> files) {
    try {//from   ww w.ja va2s .  c  om
        HttpURLConnection conn = (HttpURLConnection) (new URL(url)).openConnection();
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setUseCaches(false);

        conn.setRequestMethod("POST");
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);

        DataOutputStream out = new DataOutputStream(conn.getOutputStream());
        assembleMultipartFiles(out, vars, files);

        InputStream in = conn.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            sb.append(line);
        }
        return sb.toString();
    } catch (UnsupportedEncodingException e) {
        return "Encoding exception: " + e;
    } catch (IOException e) {
        return "IOException: " + e;
    } catch (IllegalStateException e) {
        return "IllegalState: " + e;
    }
}

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