Example usage for java.net URL openConnection

Introduction

In this page you can find the example usage for java.net URL openConnection.

Prototype

public URLConnection openConnection() throws java.io.IOException 

Source Link

Document

Returns a java.net.URLConnection URLConnection instance that represents a connection to the remote object referred to by the URL .

Usage

From source file:Main.java

/**
 * Saves a file from the given URL using HTTPS to the given filename and returns the file
 * @param link URL to file/*from www .ja va  2 s .  c o  m*/
 * @param fileName Name to save the file
 * @return The file
 * @throws IOException Thrown if any IOException occurs
 */
public static void saveFileFromNetHTTPS(URL link, String fileName) throws IOException {
    HttpsURLConnection con = (HttpsURLConnection) link.openConnection();

    InputStream in = new BufferedInputStream(con.getInputStream());
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    byte[] buf = new byte[1024];
    int n = 0;
    while (-1 != (n = in.read(buf))) {
        out.write(buf, 0, n);
    }
    out.close();
    in.close();
    byte[] response = out.toByteArray();

    File f = new File(fileName);
    if (f.getParentFile() != null) {
        if (f.getParentFile().mkdirs()) {
            System.out.println("Created Directory Structure");
        }
    }

    FileOutputStream fos = new FileOutputStream(f);
    fos.write(response);
    fos.close();
}

---

From source file:Main.java

private static String getData(String target, String method, String token) {
    try {//from ww  w  .jav a  2 s . co m
        URL url = new URL(target);
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();

        if (!TextUtils.isEmpty(token)) {
            conn.setRequestProperty("Authorization", token);
        }

        conn.setRequestMethod(method);
        conn.connect();

        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line, data = "";
        while ((line = in.readLine()) != null) {
            data += line;
        }
        in.close();

        return data;
    } catch (IOException ignored) {
        ignored.printStackTrace();
    }

    return null;
}

---

From source file:Main.java

public static String executePost(String url, String parameters) throws IOException {

    URL request = new URL(url);
    HttpURLConnection connection = (HttpURLConnection) request.openConnection();
    connection.setDoOutput(true);// w  w  w. j  a  v  a2  s  .  c o m
    connection.setDoInput(true);
    connection.setInstanceFollowRedirects(false);
    connection.setRequestMethod("POST");
    connection.setRequestProperty("User-Agent", "StripeConnectAndroid");
    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    connection.setRequestProperty("charset", "utf-8");
    connection.setRequestProperty("Content-Length", "" + Integer.toString(parameters.getBytes().length));
    connection.setUseCaches(false);

    DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
    wr.writeBytes(parameters);
    wr.flush();
    wr.close();

    String response = streamToString(connection.getInputStream());
    connection.disconnect();
    return response;

}

---

From source file:com.dianping.phoenix.dev.core.tools.generator.stable.GitRepositoryListGenerator.java

private static String curl(String url) throws Exception {
    URL reqUrl = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) reqUrl.openConnection();
    conn.setRequestMethod("GET");
    conn.setConnectTimeout(3000);//from   w w  w . j  a  va2 s.c o m
    System.out.println(url);
    return IOUtils.toString(new InputStreamReader(conn.getInputStream(), "UTF-8"));
}

---

From source file:com.dianping.phoenix.dev.core.tools.generator.stable.GitRepositoryListGenerator.java

private static int curl_code(String url) throws Exception {
    URL reqUrl = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) reqUrl.openConnection();
    conn.setRequestMethod("GET");
    conn.setConnectTimeout(3000);//ww w. j a v  a2  s  . c o m

    conn.setRequestProperty("Cookie",
            "uid=code51c3bceea328e0.87696853; remember_user_token=BAhbB1sGaXFJIiIkMmEkMTAkQUR2YXNENGNqT2NSaDBvVWRSS2guTwY6BkVU--bd148a50388e51e524e89809afd6d98e69793711; request_method=GET; _gitlab_session=BAh7CEkiD3Nlc3Npb25faWQGOgZFRkkiJTMzY2U3YzM3YjlhZWQ1ODcwNDljNDA0MjFkOTdjZjA4BjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMTNqS1V3V2paUCtCWU0rbVZtTUVraFBpTDR3MGFpZ2FtaExXeWphYjJRSVE9BjsARkkiGXdhcmRlbi51c2VyLnVzZXIua2V5BjsAVFsHWwZpcUkiIiQyYSQxMCRBRHZhc0Q0Y2pPY1JoMG9VZFJLaC5PBjsAVA%3D%3D--af5d6859bcba9e86e72ca6c3b2430400db75dcad");
    return conn.getResponseCode();
}

---

From source file:Main.java

public static void post(String actionUrl, String file) {
    try {//ww w  .j  a v a 2  s .  c  o m
        URL url = new URL(actionUrl);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setUseCaches(false);
        con.setRequestMethod("POST");
        con.setRequestProperty("Charset", "UTF-8");
        con.setRequestProperty("Content-Type", "multipart/form-data;boundary=*****");
        DataOutputStream ds = new DataOutputStream(con.getOutputStream());
        FileInputStream fStream = new FileInputStream(file);
        int bufferSize = 1024; // 1MB
        byte[] buffer = new byte[bufferSize];
        int bufferLength = 0;
        int length;
        while ((length = fStream.read(buffer)) != -1) {
            bufferLength = bufferLength + 1;
            ds.write(buffer, 0, length);
        }
        fStream.close();
        ds.flush();
        InputStream is = con.getInputStream();
        int ch;
        StringBuilder b = new StringBuilder();
        while ((ch = is.read()) != -1) {
            b.append((char) ch);
        }
        new String(b.toString().getBytes("ISO-8859-1"), "utf-8");
        ds.close();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

public static String get(String url) {
    try {/*from  ww w.j  a va  2 s .  c  o  m*/
        URL u = new URL(url);
        HttpURLConnection connection = (HttpURLConnection) u.openConnection();
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Charset", "UTF-8");
        InputStream is = connection.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        String response = "";
        String readLine = "";
        while ((readLine = br.readLine()) != null) {
            response += readLine;
        }
        br.close();
        return response;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

---

From source file:InsertClobToMySqlServlet.java

public static String getClobsContentAsString(String urlAsString) throws Exception {
    InputStream content = null;//from w w  w.  j  a va 2  s.  com
    try {
        URL url = new URL(urlAsString);
        URLConnection urlConn = url.openConnection();
        urlConn.connect();
        content = urlConn.getInputStream();

        int BUFFER_SIZE = 1024;
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        int length;
        byte[] buffer = new byte[BUFFER_SIZE];

        while ((length = content.read(buffer)) != -1) {
            output.write(buffer, 0, length);
        }
        return new String(output.toByteArray());
    } finally {
        content.close();
    }
}

---

From source file:com.sagalasan.eveapi.engine.RequestEngine.java

public static byte[] xmlRequest(XmlRequest xmlRequest) {
    try {/*  w w  w. j  a  va2s  .c om*/
        URL url = new URL(xmlRequest.buildUri());
        URLConnection connection = url.openConnection();
        InputStream inputStream = connection.getInputStream();
        return IOUtils.toByteArray(inputStream);
    } catch (IOException e) {
        logger.error(e.getMessage());
    }

    return null;
}

---

From source file:Main.java

public static String callJsonAPI(String urlString) {
    // Use HttpURLConnection as per Android 6.0 spec, instead of less efficient HttpClient
    HttpURLConnection urlConnection = null;
    StringBuilder jsonResult = new StringBuilder();

    try {/*from ww w.ja va 2s .  c  om*/
        URL url = new URL(urlString);
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.setUseCaches(false);
        urlConnection.setConnectTimeout(TIMEOUT_CONNECTION);
        urlConnection.setReadTimeout(TIMEOUT_READ);
        urlConnection.connect();

        int status = urlConnection.getResponseCode();

        switch (status) {
        case 200:
        case 201:
            BufferedReader br = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));

            String line;
            while ((line = br.readLine()) != null) {
                jsonResult.append(line).append("\n");
            }
            br.close();
        }
    } catch (MalformedURLException e) {
        System.err.print(e.getMessage());
        return e.getMessage();
    } catch (IOException e) {
        System.err.print(e.getMessage());
        return e.getMessage();
    } finally {
        if (urlConnection != null) {
            try {
                urlConnection.disconnect();
            } catch (Exception e) {
                System.err.print(e.getMessage());
            }
        }
    }
    return jsonResult.toString();
}

---

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