Example usage for java.net HttpURLConnection setRequestProperty

List of usage examples for java.net HttpURLConnection setRequestProperty

  1. HOME
  2. Java
  3. java
  4. java.net.*
  5. HttpURLConnection
  6. setRequestProperty

Introduction

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

Prototype

public void setRequestProperty(String key, String value)

Source Link

Document

Sets the general request property.

Usage

From source file:com.mingsoft.weixin.util.UploadDownUtils.java

/**
 * ? ? /*from   w  w w . j ava  2s.co m*/
 * @param access_token ??
 * @param msgType image?voice?videothumb
 * @param localFile 
 * @return
 */
@Deprecated
public static String uploadMedia(String access_token, String msgType, String localFile) {
    String media_id = null;
    String url = "http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token=" + access_token + "&type="
            + msgType;
    String local_url = localFile;
    try {
        File file = new File(local_url);
        if (!file.exists() || !file.isFile()) {
            log.error("==" + local_url);
            return null;
        }
        URL urlObj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) urlObj.openConnection();
        con.setRequestMethod("POST"); // Post????get?
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setUseCaches(false); // post??
        // ?
        con.setRequestProperty("Connection", "Keep-Alive");
        con.setRequestProperty("Charset", "UTF-8");

        // 
        String BOUNDARY = "----------" + System.currentTimeMillis();
        con.setRequestProperty("content-type", "multipart/form-data; boundary=" + BOUNDARY);
        // con.setRequestProperty("Content-Type",
        // "multipart/mixed; boundary=" + BOUNDARY);
        // con.setRequestProperty("content-type", "text/html");
        // ?

        // 
        StringBuilder sb = new StringBuilder();
        sb.append("--"); // ////////?
        sb.append(BOUNDARY);
        sb.append("\r\n");
        sb.append("Content-Disposition: form-data;name=\"file\";filename=\"" + file.getName() + "\"\r\n");
        sb.append("Content-Type:application/octet-stream\r\n\r\n");
        byte[] head = sb.toString().getBytes("utf-8");
        // ?
        OutputStream out = new DataOutputStream(con.getOutputStream());
        out.write(head);

        // 
        DataInputStream in = new DataInputStream(new FileInputStream(file));
        int bytes = 0;
        byte[] bufferOut = new byte[1024];
        while ((bytes = in.read(bufferOut)) != -1) {
            out.write(bufferOut, 0, bytes);
        }
        in.close();
        // 
        byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// ??
        out.write(foot);
        out.flush();
        out.close();
        /**
         * ????,?????
         */
        // con.getResponseCode();
        try {
            // BufferedReader???URL?
            StringBuffer buffer = new StringBuffer();
            BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));
            String line = null;
            while ((line = reader.readLine()) != null) {
                // System.out.println(line);
                buffer.append(line);
            }
            String respStr = buffer.toString();
            log.debug("==respStr==" + respStr);
            try {
                JSONObject dataJson = JSONObject.parseObject(respStr);

                media_id = dataJson.getString("media_id");
            } catch (Exception e) {
                log.error("==respStr==" + respStr, e);
                try {
                    JSONObject dataJson = JSONObject.parseObject(respStr);
                    return dataJson.getString("errcode");
                } catch (Exception e1) {
                }
            }
        } catch (Exception e) {
            log.error("??POST?" + e);
        }
    } catch (Exception e) {
        log.error("?!=" + local_url);
        log.error("?!", e);
    } finally {
    }
    return media_id;
}

From source file:com.androidex.volley.toolbox.HurlStack.java

/**
 * Perform a multipart request on a connection
 * /*from w w w  .java 2  s. c  om*/
 * @param connection
 *            The Connection to perform the multi part request
 * @param request
 *            The params to add to the Multi Part request
 *            The files to upload
 * @throws ProtocolException
 */
private static void setConnectionParametersForMultipartRequest(HttpURLConnection connection, Request<?> request)
        throws IOException, ProtocolException {

    final String charset = ((MultiPartRequest<?>) request).getProtocolCharset();
    final int curTime = (int) (System.currentTimeMillis() / 1000);
    final String boundary = BOUNDARY_PREFIX + curTime;
    connection.setRequestMethod("POST");
    connection.setDoOutput(true);
    connection.setRequestProperty(HEADER_CONTENT_TYPE, String.format(CONTENT_TYPE_MULTIPART, charset, curTime));

    Map<String, MultiPartParam> multipartParams = ((MultiPartRequest<?>) request).getMultipartParams();
    Map<String, String> filesToUpload = ((MultiPartRequest<?>) request).getFilesToUpload();

    if (((MultiPartRequest<?>) request).isFixedStreamingMode()) {
        int contentLength = getContentLengthForMultipartRequest(boundary, multipartParams, filesToUpload);

        connection.setFixedLengthStreamingMode(contentLength);
    } else {
        connection.setChunkedStreamingMode(0);
    }
    // Modified end

    ProgressListener progressListener;
    progressListener = (ProgressListener) request;

    PrintWriter writer = null;
    try {
        OutputStream out = connection.getOutputStream();
        writer = new PrintWriter(new OutputStreamWriter(out, charset), true);

        for (String key : multipartParams.keySet()) {
            MultiPartParam param = multipartParams.get(key);

            writer.append(boundary).append(CRLF)
                    .append(String.format(HEADER_CONTENT_DISPOSITION + COLON_SPACE + FORM_DATA, key))
                    .append(CRLF).append(HEADER_CONTENT_TYPE + COLON_SPACE + param.contentType).append(CRLF)
                    .append(CRLF).append(param.value).append(CRLF).flush();
        }

        for (String key : filesToUpload.keySet()) {

            File file = new File(filesToUpload.get(key));

            if (!file.exists()) {
                throw new IOException(String.format("File not found: %s", file.getAbsolutePath()));
            }

            if (file.isDirectory()) {
                throw new IOException(String.format("File is a directory: %s", file.getAbsolutePath()));
            }

            writer.append(boundary).append(CRLF)
                    .append(String.format(
                            HEADER_CONTENT_DISPOSITION + COLON_SPACE + FORM_DATA + SEMICOLON_SPACE + FILENAME,
                            key, file.getName()))
                    .append(CRLF).append(HEADER_CONTENT_TYPE + COLON_SPACE + CONTENT_TYPE_OCTET_STREAM)
                    .append(CRLF).append(HEADER_CONTENT_TRANSFER_ENCODING + COLON_SPACE + BINARY).append(CRLF)
                    .append(CRLF).flush();

            BufferedInputStream input = null;
            try {
                FileInputStream fis = new FileInputStream(file);
                int transferredBytes = 0;
                int totalSize = (int) file.length();
                input = new BufferedInputStream(fis);
                int bufferLength = 0;

                byte[] buffer = new byte[1024];
                while ((bufferLength = input.read(buffer)) > 0) {
                    out.write(buffer, 0, bufferLength);
                    transferredBytes += bufferLength;
                    progressListener.onProgress(transferredBytes, totalSize);
                }
                out.flush(); // Important! Output cannot be closed. Close of
                             // writer will close
                             // output as well.
            } finally {
                if (input != null)
                    try {
                        input.close();
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
            }
            writer.append(CRLF).flush(); // CRLF is important! It indicates
            // end of binary
            // boundary.
        }

        // End of multipart/form-data.
        writer.append(boundary + BOUNDARY_PREFIX).append(CRLF).flush();

    } catch (Exception e) {
        e.printStackTrace();

    } finally {
        if (writer != null) {
            writer.close();
        }
    }
}

From source file:com.volley.air.toolbox.HurlStack.java

/**
 * Perform a multipart request on a connection
 * //from w w w.j ava  2 s . c o m
 * @param connection
 *            The Connection to perform the multi part request
 * @param request
 *            The params to add to the Multi Part request
 *            The files to upload
 * @throws ProtocolException
 */
private static void setConnectionParametersForMultipartRequest(HttpURLConnection connection, Request<?> request)
        throws IOException, ProtocolException {

    final String charset = ((MultiPartRequest<?>) request).getProtocolCharset();
    final int curTime = (int) (System.currentTimeMillis() / 1000);
    final String boundary = BOUNDARY_PREFIX + curTime;
    connection.setRequestMethod("POST");
    connection.setDoOutput(true);
    connection.setRequestProperty(HEADER_CONTENT_TYPE, String.format(CONTENT_TYPE_MULTIPART, charset, curTime));

    Map<String, MultiPartParam> multipartParams = ((MultiPartRequest<?>) request).getMultipartParams();
    Map<String, String> filesToUpload = ((MultiPartRequest<?>) request).getFilesToUpload();

    if (((MultiPartRequest<?>) request).isFixedStreamingMode()) {
        int contentLength = getContentLengthForMultipartRequest(boundary, multipartParams, filesToUpload);

        connection.setFixedLengthStreamingMode(contentLength);
    } else {
        connection.setChunkedStreamingMode(0);
    }
    // Modified end

    ProgressListener progressListener;
    progressListener = (ProgressListener) request;

    PrintWriter writer = null;
    try {
        OutputStream out = connection.getOutputStream();
        writer = new PrintWriter(new OutputStreamWriter(out, charset), true);

        for (Entry<String, MultiPartParam> entry : multipartParams.entrySet()) {
            MultiPartParam param = entry.getValue();

            writer.append(boundary).append(CRLF)
                    .append(String.format(HEADER_CONTENT_DISPOSITION + COLON_SPACE + FORM_DATA, entry.getKey()))
                    .append(CRLF).append(HEADER_CONTENT_TYPE + COLON_SPACE + param.contentType).append(CRLF)
                    .append(CRLF).append(param.value).append(CRLF).flush();
        }

        for (Entry<String, String> entry : filesToUpload.entrySet()) {

            File file = new File(entry.getValue());

            if (!file.exists()) {
                throw new IOException(String.format("File not found: %s", file.getAbsolutePath()));
            }

            if (file.isDirectory()) {
                throw new IOException(String.format("File is a directory: %s", file.getAbsolutePath()));
            }

            writer.append(boundary).append(CRLF)
                    .append(String.format(
                            HEADER_CONTENT_DISPOSITION + COLON_SPACE + FORM_DATA + SEMICOLON_SPACE + FILENAME,
                            entry.getKey(), file.getName()))
                    .append(CRLF).append(HEADER_CONTENT_TYPE + COLON_SPACE + CONTENT_TYPE_OCTET_STREAM)
                    .append(CRLF).append(HEADER_CONTENT_TRANSFER_ENCODING + COLON_SPACE + BINARY).append(CRLF)
                    .append(CRLF).flush();

            BufferedInputStream input = null;
            try {
                FileInputStream fis = new FileInputStream(file);
                int transferredBytes = 0;
                int totalSize = (int) file.length();
                input = new BufferedInputStream(fis);
                int bufferLength;

                byte[] buffer = new byte[1024];
                while ((bufferLength = input.read(buffer)) > 0) {
                    out.write(buffer, 0, bufferLength);
                    transferredBytes += bufferLength;
                    progressListener.onProgress(transferredBytes, totalSize);
                }
                out.flush(); // Important! Output cannot be closed. Close of
                             // writer will close
                             // output as well.
            } finally {
                if (input != null)
                    try {
                        input.close();
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
            }
            writer.append(CRLF).flush(); // CRLF is important! It indicates
            // end of binary
            // boundary.
        }

        // End of multipart/form-data.
        writer.append(boundary + BOUNDARY_PREFIX).append(CRLF).flush();

    } catch (Exception e) {
        e.printStackTrace();

    } finally {
        if (writer != null) {
            writer.close();
        }
    }
}

From source file:com.jooketechnologies.network.ServerUtilities.java

static JSONObject post(String endpoint, int action, Map<String, String> params) {
    URL url;/*from w w  w. ja v a2 s .  c  o  m*/
    try {
        url = new URL(endpoint);
    } catch (MalformedURLException e) {
        throw new IllegalArgumentException("invalid url: " + endpoint);
    }
    StringBuilder bodyBuilder = new StringBuilder();
    Iterator<Entry<String, String>> iterator = params.entrySet().iterator();
    // constructs the POST body using the parameters
    while (iterator.hasNext()) {
        Entry<String, String> param = iterator.next();
        bodyBuilder.append(param.getKey()).append('=').append(param.getValue());
        if (iterator.hasNext()) {
            bodyBuilder.append('&');
        }
    }
    String body = bodyBuilder.toString();
    byte[] bytes = body.getBytes();
    HttpURLConnection conn = null;
    try {
        conn = (HttpURLConnection) url.openConnection();
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setFixedLengthStreamingMode(bytes.length);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
        // post the request
        OutputStream out = conn.getOutputStream();
        out.write(bytes);
        out.close();
        // handle the response

        int status = conn.getResponseCode();
        InputStream is = conn.getInputStream();
        if (status != 200) {
            if (conn != null) {
                conn.disconnect();
            }
        } else {
            JSONObject jsonObject = streamToString(is);
            return jsonObject;
        }
    } catch (IOException e) {

        e.printStackTrace();
    }
    return null;

}

From source file:com.alibaba.akita.io.HttpInvoker.java

/**
 * post with files using URLConnection Impl
 * @param actionUrl URL to post/* w  w  w  .  jav  a2s.c o m*/
 * @param params params to post
 * @param files files to post, support multi-files
 * @return response in String format
 * @throws IOException
 */
public static String postWithFilesUsingURLConnection(String actionUrl, ArrayList<NameValuePair> params,
        Map<String, File> files) throws AkInvokeException {
    try {
        String BOUNDARY = java.util.UUID.randomUUID().toString();
        String PREFIX = "--", LINEND = "\r\n";
        String MULTIPART_FROM_DATA = "multipart/form-data";
        String CHARSET = "UTF-8";

        URL uri = new URL(actionUrl);
        HttpURLConnection conn = (HttpURLConnection) uri.openConnection();

        conn.setReadTimeout(60 * 1000);
        conn.setDoInput(true); // permit input
        conn.setDoOutput(true); // permit output
        conn.setUseCaches(false);
        conn.setRequestMethod("POST"); // Post Method
        conn.setRequestProperty("connection", "keep-alive");
        conn.setRequestProperty("Charsert", "UTF-8");
        conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

        // firstly string params to add
        StringBuilder sb = new StringBuilder();
        for (NameValuePair nameValuePair : params) {
            sb.append(PREFIX);
            sb.append(BOUNDARY);
            sb.append(LINEND);
            sb.append("Content-Disposition: form-data; name=\"" + nameValuePair.getName() + "\"" + LINEND);
            sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
            sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
            sb.append(LINEND);
            sb.append(nameValuePair.getValue());
            sb.append(LINEND);
        }

        DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
        outStream.write(sb.toString().getBytes());
        // send files secondly
        if (files != null) {
            int num = 0;
            for (Map.Entry<String, File> file : files.entrySet()) {
                num++;
                if (file.getKey() == null || file.getValue() == null)
                    continue;
                else {
                    if (!file.getValue().exists()) {
                        throw new AkInvokeException(AkInvokeException.CODE_FILE_NOT_FOUND,
                                "The file to upload is not found.");
                    }
                }
                StringBuilder sb1 = new StringBuilder();
                sb1.append(PREFIX);
                sb1.append(BOUNDARY);
                sb1.append(LINEND);
                sb1.append("Content-Disposition: form-data; name=\"file" + num + "\"; filename=\""
                        + file.getKey() + "\"" + LINEND);
                sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
                sb1.append(LINEND);
                outStream.write(sb1.toString().getBytes());

                InputStream is = new FileInputStream(file.getValue());
                byte[] buffer = new byte[1024];
                int len = 0;
                while ((len = is.read(buffer)) != -1) {
                    outStream.write(buffer, 0, len);
                }

                is.close();
                outStream.write(LINEND.getBytes());
            }
        }

        // request end flag
        byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
        outStream.write(end_data);
        outStream.flush();
        // get response code
        int res = conn.getResponseCode();
        InputStream in = conn.getInputStream();
        StringBuilder sb2 = new StringBuilder();
        if (res == 200) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf-8"), 8192);
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb2.append(line + "\n");
            }
            reader.close();
        }
        outStream.close();
        conn.disconnect();
        return sb2.toString();
    } catch (IOException ioe) {
        throw new AkInvokeException(AkInvokeException.CODE_IO_EXCEPTION, "IO Exception", ioe);
    }
}

From source file:com.melniqw.instagramsdk.Network.java

private static String sendDummyRequest(String url, String body, Request request) throws IOException {
    HttpURLConnection connection = null;
    try {//  w  w w  .jav  a2 s  .  co  m
        connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setConnectTimeout(10000);
        connection.setReadTimeout(10000);
        connection.setUseCaches(false);
        connection.setDoInput(true);
        //            connection.setRequestProperty("Content-Type", "text/plain; charset=utf-8");
        if (request == Request.GET) {
            connection.setDoOutput(false);
            connection.setRequestMethod("GET");
        } else if (request == Request.POST) {
            connection.setDoOutput(true);
            connection.setRequestMethod("POST");
        }
        if (REQUEST_ENABLE_COMPRESSION)
            connection.setRequestProperty("Accept-Encoding", "gzip");
        if (request == Request.POST)
            connection.getOutputStream().write(body.getBytes("utf-8"));
        int code = connection.getResponseCode();
        System.out.println(TAG + " responseCode = " + code);
        //It may happen due to keep-alive problem http://stackoverflow.com/questions/1440957/httpurlconnection-getresponsecode-returns-1-on-second-invocation
        if (code == -1)
            throw new WrongResponseCodeException("Network error");
        // ?    200
        //on error can also read error stream from connection.
        InputStream inputStream = new BufferedInputStream(connection.getInputStream(), 8192);
        String encoding = connection.getHeaderField("Content-Encoding");
        if (encoding != null && encoding.equalsIgnoreCase("gzip"))
            inputStream = new GZIPInputStream(inputStream);
        String response = Utils.convertStreamToString(inputStream);
        System.out.println(TAG + " response = " + response);
        return response;
    } finally {
        if (connection != null)
            connection.disconnect();
    }
}

From source file:com.omertron.themoviedbapi.tools.WebBrowser.java

public static String request(URL url, String jsonBody, boolean isDeleteRequest) throws MovieDbException {

    StringWriter content = null;//from w ww .j a v  a2 s. c  o  m

    try {
        content = new StringWriter();

        BufferedReader in = null;
        HttpURLConnection cnx = null;
        OutputStreamWriter wr = null;
        try {
            cnx = (HttpURLConnection) openProxiedConnection(url);

            // If we get a null connection, then throw an exception
            if (cnx == null) {
                throw new MovieDbException(MovieDbException.MovieDbExceptionType.CONNECTION_ERROR,
                        "No HTTP connection could be made.", url);
            }

            if (isDeleteRequest) {
                cnx.setDoOutput(true);
                cnx.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                cnx.setRequestMethod("DELETE");
            }

            sendHeader(cnx);

            if (StringUtils.isNotBlank(jsonBody)) {
                cnx.setDoOutput(true);
                wr = new OutputStreamWriter(cnx.getOutputStream());
                wr.write(jsonBody);
            }

            readHeader(cnx);

            // http://stackoverflow.com/questions/4633048/httpurlconnection-reading-response-content-on-403-error
            if (cnx.getResponseCode() >= 400) {
                in = new BufferedReader(new InputStreamReader(cnx.getErrorStream(), getCharset(cnx)));
            } else {
                in = new BufferedReader(new InputStreamReader(cnx.getInputStream(), getCharset(cnx)));
            }

            String line;
            while ((line = in.readLine()) != null) {
                content.write(line);
            }
        } finally {
            if (wr != null) {
                wr.flush();
                wr.close();
            }

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

            if (cnx instanceof HttpURLConnection) {
                ((HttpURLConnection) cnx).disconnect();
            }
        }
        return content.toString();
    } catch (IOException ex) {
        throw new MovieDbException(MovieDbException.MovieDbExceptionType.CONNECTION_ERROR, null, url, ex);
    } finally {
        if (content != null) {
            try {
                content.close();
            } catch (IOException ex) {
                LOG.debug("Failed to close connection: " + ex.getMessage());
            }
        }
    }
}

From source file:com.kiwiteam.nomiddleman.TourPageActivity.java

/**
 * Checks if link is active//  w w  w . ja va  2s  . co m
 * @param urlString
 * @return
 * @throws MalformedURLException
 * @throws IOException
 */
public static int getResponseCode(String urlString) throws MalformedURLException, IOException {
    URL u = new URL(urlString);
    HttpURLConnection huc = (HttpURLConnection) u.openConnection();
    huc.setRequestMethod("GET");
    huc.setRequestProperty("User-Agent",
            "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
    huc.connect();
    return huc.getResponseCode();
}

From source file:com.gmobi.poponews.util.HttpHelper.java

private static Response doRequest(String url, Object raw, int method) {
    disableSslCheck();//from   w  w w.ja v a2 s  .c om
    boolean isJson = raw instanceof JSONObject;
    String body = raw == null ? null : raw.toString();
    Response response = new Response();
    HttpURLConnection connection = null;
    try {
        URL httpURL = new URL(url);
        connection = (HttpURLConnection) httpURL.openConnection();
        connection.setConnectTimeout(15000);
        connection.setReadTimeout(30000);
        connection.setUseCaches(false);
        if (method == HTTP_POST)
            connection.setRequestMethod("POST");
        if (body != null) {
            if (isJson) {
                connection.setRequestProperty("Accept", "application/json");
                connection.setRequestProperty("Content-Type", "application/json");
            }
            OutputStream os = connection.getOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(os);
            osw.write(body);
            osw.flush();
            osw.close();
        }
        InputStream in = connection.getInputStream();
        response.setBody(FileHelper.readText(in, "UTF-8"));
        response.setStatusCode(connection.getResponseCode());
        in.close();
        connection.disconnect();
        connection = null;
    } catch (Exception e) {
        Logger.error(e);
        try {
            if ((connection != null) && (response.getBody() == null) && (connection.getErrorStream() != null)) {
                response.setBody(FileHelper.readText(connection.getErrorStream(), "UTF-8"));
            }
        } catch (Exception ex) {
            Logger.error(ex);
        }
    }
    return response;
}

From source file:org.akita.io.HttpInvoker.java

/**
 * post with files using URLConnection Impl
 * @param actionUrl URL to post//from  w  w w  .j  a  va2s.com
 * @param params params to post
 * @param files files to post, support multi-files
 * @return response in String format
 * @throws IOException
 */
public static String postWithFilesUsingURLConnection(String actionUrl, ArrayList<NameValuePair> params,
        Map<String, File> files) throws AkInvokeException {
    try {
        Log.v(TAG, "post:" + actionUrl);
        if (params != null) {
            Log.v(TAG, "params:=====================");
            for (NameValuePair nvp : params) {
                Log.v(TAG, nvp.getName() + "=" + nvp.getValue());
            }
            Log.v(TAG, "params end:=====================");
        }

        String BOUNDARY = java.util.UUID.randomUUID().toString();
        String PREFIX = "--", LINEND = "\r\n";
        String MULTIPART_FROM_DATA = "multipart/form-data";
        String CHARSET = "UTF-8";

        URL uri = new URL(actionUrl);
        HttpURLConnection conn = (HttpURLConnection) uri.openConnection();

        conn.setReadTimeout(60 * 1000);
        conn.setDoInput(true); // permit input
        conn.setDoOutput(true); // permit output
        conn.setUseCaches(false);
        conn.setRequestMethod("POST"); // Post Method
        conn.setRequestProperty("connection", "keep-alive");
        conn.setRequestProperty("Charsert", "UTF-8");
        conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

        // firstly string params to add
        StringBuilder sb = new StringBuilder();
        for (NameValuePair nameValuePair : params) {
            sb.append(PREFIX);
            sb.append(BOUNDARY);
            sb.append(LINEND);
            sb.append("Content-Disposition: form-data; name=\"" + nameValuePair.getName() + "\"" + LINEND);
            sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
            sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
            sb.append(LINEND);
            sb.append(nameValuePair.getValue());
            sb.append(LINEND);
        }

        DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
        outStream.write(sb.toString().getBytes());
        // send files secondly
        if (files != null) {
            int num = 0;
            for (Map.Entry<String, File> file : files.entrySet()) {
                num++;
                if (file.getKey() == null || file.getValue() == null)
                    continue;
                else {
                    if (!file.getValue().exists()) {
                        throw new AkInvokeException(AkInvokeException.CODE_FILE_NOT_FOUND,
                                "The file to upload is not found.");
                    }
                }
                StringBuilder sb1 = new StringBuilder();
                sb1.append(PREFIX);
                sb1.append(BOUNDARY);
                sb1.append(LINEND);
                sb1.append("Content-Disposition: form-data; name=\"" + file.getKey() + "\"; filename=\""
                        + file.getKey() + "\"" + LINEND);
                sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
                sb1.append(LINEND);
                outStream.write(sb1.toString().getBytes());

                InputStream is = new FileInputStream(file.getValue());
                byte[] buffer = new byte[1024];
                int len = 0;
                while ((len = is.read(buffer)) != -1) {
                    outStream.write(buffer, 0, len);
                }

                is.close();
                outStream.write(LINEND.getBytes());
            }
        }

        // request end flag
        byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
        outStream.write(end_data);
        outStream.flush();
        // get response code
        int res = conn.getResponseCode();
        InputStream in = conn.getInputStream();
        StringBuilder sb2 = new StringBuilder();
        if (res == 200) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf-8"), 8192);
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb2.append(line + "\n");
            }
            reader.close();
        }
        outStream.close();
        conn.disconnect();
        Log.v(TAG, "response:" + sb2.toString());
        return sb2.toString();
    } catch (IOException ioe) {
        throw new AkInvokeException(AkInvokeException.CODE_IO_EXCEPTION, "IO Exception", ioe);
    }
}