Example usage for java.net HttpURLConnection getHeaderField

List of usage examples for java.net HttpURLConnection getHeaderField

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Introduction

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

Prototype

public String getHeaderField(int n)

Source Link

Document

Returns the value for the n th header field.

Usage

From source file:com.epam.catgenome.manager.externaldb.HttpDataManager.java

private String getResultFromURL(final String location) throws ExternalDbUnavailableException {

    HttpURLConnection conn = null;
    try {//from  ww w. j  ava 2 s . c om
        conn = createConnection(location);
        HttpURLConnection.setFollowRedirects(true);
        conn.setDoInput(true);
        conn.setRequestProperty(CONTENT_TYPE, APPLICATION_JSON);
        conn.connect();

        int status = conn.getResponseCode();

        while (true) {
            long wait = 0;
            String header = conn.getHeaderField(HTTP_HEADER_RETRY_AFTER);

            if (header != null) {
                wait = Integer.valueOf(header);
            }

            if (wait == 0) {
                break;
            }

            LOGGER.info(String.format(WAITING_FORMAT, wait));
            conn.disconnect();

            Thread.sleep(wait * MILLIS_IN_SECOND);

            conn = (HttpURLConnection) new URL(location).openConnection();
            conn.setDoInput(true);
            conn.connect();
            status = conn.getResponseCode();

        }
        return getHttpResult(status, location, conn);
    } catch (InterruptedException | IOException e) {
        throw new ExternalDbUnavailableException(String.format(EXCEPTION_MESSAGE, location), e);
    } finally {
        if (conn != null) {
            conn.disconnect();
        }

        resetProxy();
    }
}

From source file:org.apache.oozie.client.OozieClient.java

static void handleError(HttpURLConnection conn) throws IOException, OozieClientException {
    int status = conn.getResponseCode();
    String error = conn.getHeaderField(RestConstants.OOZIE_ERROR_CODE);
    String message = conn.getHeaderField(RestConstants.OOZIE_ERROR_MESSAGE);

    if (error == null) {
        error = "HTTP error code: " + status;
    }//from  w w  w  .  j  av  a 2s  . c  om

    if (message == null) {
        message = conn.getResponseMessage();
    }
    throw new OozieClientException(error, message);
}

From source file:org.apache.jmeter.protocol.http.sampler.HTTPJavaImpl.java

protected void disconnect(HttpURLConnection conn) {
    if (conn != null) {
        String connection = conn.getHeaderField(HTTPConstants.HEADER_CONNECTION);
        String protocol = conn.getHeaderField(0);
        if ((connection == null && (protocol == null || !protocol.startsWith(HTTPConstants.HTTP_1_1)))
                || (connection != null && connection.equalsIgnoreCase(HTTPConstants.CONNECTION_CLOSE))) {
            conn.disconnect();/*  w  w w . j a va  2s.c  o m*/
        } // TODO ? perhaps note connection so it can be disconnected at end of test?
    }
}

From source file:org.apache.hadoop.hdfs.ByteRangeInputStream.java

@VisibleForTesting
protected InputStream openInputStream() throws IOException {
    // Use the original url if no resolved url exists, eg. if
    // it's the first time a request is made.
    final boolean resolved = resolvedURL.getURL() != null;
    final URLOpener opener = resolved ? resolvedURL : originalURL;

    final HttpURLConnection connection = opener.connect(startPos, resolved);
    resolvedURL.setURL(getResolvedUrl(connection));

    InputStream in = connection.getInputStream();
    final Map<String, List<String>> headers = connection.getHeaderFields();
    if (isChunkedTransferEncoding(headers)) {
        // file length is not known
        fileLength = null;/*from w ww  .jav a2 s .c o m*/
    } else {
        // for non-chunked transfer-encoding, get content-length
        final String cl = connection.getHeaderField(HttpHeaders.CONTENT_LENGTH);
        if (cl == null) {
            throw new IOException(HttpHeaders.CONTENT_LENGTH + " is missing: " + headers);
        }
        final long streamlength = Long.parseLong(cl);
        fileLength = startPos + streamlength;

        // Java has a bug with >2GB request streams.  It won't bounds check
        // the reads so the transfer blocks until the server times out
        in = new BoundedInputStream(in, streamlength);
    }

    return in;
}

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

/**
 * ? // w w  w  .  j  a  v  a  2s .  c  o m
 * 
 * @return
 */
public String downMedia(String msgType, String media_id, String path) {
    String localFile = null;
    //      SimpleDateFormat df = new SimpleDateFormat("/yyyyMM/");
    try {
        String url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=" + getAccessToken()
                + "&media_id=" + media_id;
        // log.error(path);
        // ? ?
        URL urlObj = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();
        conn.setRequestMethod("GET");
        conn.setConnectTimeout(5000);
        String xx = conn.getHeaderField("Content-disposition");
        try {
            log.debug("===? +==?==" + xx);
            if (xx == null) {
                InputStream in = conn.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf-8"));
                String line = null;
                String result = null;
                while ((line = reader.readLine()) != null) {
                    if (result == null) {
                        result = line;
                    } else {
                        result += line;
                    }
                }
                System.out.println(result);
                JSONObject dataJson = JSONObject.parseObject(result);
                return dataJson.getString("errcode");
            }
        } catch (Exception e) {
        }
        if (conn.getResponseCode() == 200) {
            String Content_disposition = conn.getHeaderField("Content-disposition");
            InputStream inputStream = conn.getInputStream();
            // // ?
            // Long fileSize = conn.getContentLengthLong();
            //  +
            String savePath = path + "/" + msgType;
            // ??
            String fileName = StringUtil.getDateSimpleStr()
                    + Content_disposition.substring(Content_disposition.lastIndexOf(".")).replace("\"", "");
            // 
            File saveDirFile = new File(savePath);
            if (!saveDirFile.exists()) {
                saveDirFile.mkdirs();
            }
            // ??
            if (!saveDirFile.canWrite()) {
                log.error("??");
                throw new Exception();
            }
            // System.out.println("------------------------------------------------");
            // ?
            File file = new File(saveDirFile + "/" + fileName);
            FileOutputStream outStream = new FileOutputStream(file);
            int len = -1;
            byte[] b = new byte[1024];
            while ((len = inputStream.read(b)) != -1) {
                outStream.write(b, 0, len);
            }
            outStream.flush();
            outStream.close();
            inputStream.close();
            // ?
            localFile = fileName;
        }
    } catch (Exception e) {
        log.error("? !", e);
    } finally {

    }
    return localFile;
}

From source file:org.eurekastreams.server.service.actions.strategies.links.ConnectionFacade.java

/**
 * Get the final URL after redirect.// w  w w. ja  v  a 2 s.com
 *
 * @param url
 *            the initial url.
 * @param inAccountId
 *            account id of the user making the request.
 * @return the final url.
 * @throws IOException
 *             shouldn't happen.
 */
public String getFinalUrl(final String url, final String inAccountId) throws IOException {
    HttpURLConnection connection = getConnection(url, inAccountId);
    if (connection != null && redirectCodes.contains(connection.getResponseCode())) {
        String redirUrl = connection.getHeaderField("Location");
        log.trace("Found redirect header to: " + redirUrl);

        // Check for protocol change
        if (redirUrl.startsWith("http://")) {
            log.trace("Changing protocol to HTTP");
            return redirUrl;
        }
    }

    return url;
}

From source file:javafxpert.conceptmap.alexa.ConceptMapSpeechlet.java

/**
 * Call a ConceptMap endpoint to retrieve related claims
 *
 * @throws IOException/*from  w ww  . j a va  2 s.  c o  m*/
 */
//private SpeechletResponse makeClaimsRequest(String itemId, String propId) {
private SpeechletResponse makeClaimsRequest(String itemValue, String relationshipValue) {
    String properCasedItemValue = WordUtils.capitalize(itemValue);
    String speechOutput = "";
    Image image = new Image();

    // Translate requested item and relationship to Q and P numbers
    //String itemId = "Q887401";
    String propId = "P54";
    String itemId = locateItemId(properCasedItemValue);
    if (itemId != null && itemId.length() > 0) {

        String queryString = String.format("?id=%s&direction=f&prop=%s&depth=1", itemId, propId);

        InputStreamReader inputStream = null;
        BufferedReader bufferedReader = null;
        StringBuilder builder = new StringBuilder();
        try {
            String line;
            URL url = new URL(TRAVERSAL_ENDPOINT + queryString);
            inputStream = new InputStreamReader(url.openStream(), Charset.forName("US-ASCII"));
            bufferedReader = new BufferedReader(inputStream);
            while ((line = bufferedReader.readLine()) != null) {
                builder.append(line);
            }
        } catch (IOException e) {
            // reset builder to a blank string
            builder.setLength(0);
        } finally {
            IOUtils.closeQuietly(inputStream);
            IOUtils.closeQuietly(bufferedReader);

            log.info("builder: " + builder);
        }

        if (builder.length() == 0) {
            speechOutput = "Sorry, the Concept Map claims service is experiencing a problem. "
                    + "Please try again later.";
        } else {
            try {
                JSONObject claimsResponseObject = new JSONObject(new JSONTokener(builder.toString()));

                if (claimsResponseObject != null) {
                    ClaimsInfo claimsInfo = createClaimsInfo(claimsResponseObject, itemId);

                    log.info("claimsInfo: " + claimsInfo);

                    speechOutput = "Item " + properCasedItemValue + " not found";

                    if (claimsInfo.getItemLabels().size() > 0) {
                        speechOutput = new StringBuilder().append(properCasedItemValue)
                                //.append(claimsInfo.getItemLabels().get(0))
                                .append(" has been a member of ").append(relationshipValue).append(" \n")
                                .append(claimsInfo.toItemLabelsSpeech()).toString();
                    }

                    // Get the picture redirect
                    URL url = new URL(claimsInfo.getPictureUrl());
                    HttpURLConnection.setFollowRedirects(false);
                    final HttpURLConnection con = (HttpURLConnection) url.openConnection();
                    //con.setInstanceFollowRedirects(false);
                    final int responseCode = con.getResponseCode();
                    final String redirectLocation = con.getHeaderField("Location");
                    image.setSmallImageUrl(redirectLocation);
                }
                //} catch (JSONException | ParseException e) {
            } catch (JSONException | IOException e) {
                log.error("Exception occoured while parsing service response.", e);
            }
        }
    } else {
        speechOutput = "Couldn't locate an Item ID for item " + properCasedItemValue;
    }

    // Create the Simple card content.
    StandardCard card = new StandardCard();
    card.setTitle(properCasedItemValue);
    card.setText(speechOutput);
    card.setImage(image);
    // Create the plain text output
    PlainTextOutputSpeech outputSpeech = new PlainTextOutputSpeech();
    outputSpeech.setText(speechOutput);

    return SpeechletResponse.newTellResponse(outputSpeech, card);
}

From source file:org.apache.jmeter.protocol.http.sampler.HTTPJavaImplClassifier.java

protected void disconnect(HttpURLConnection conn) {
    if (conn != null) {
        String connection = conn.getHeaderField(HTTPConstants.HEADER_CONNECTION);
        String protocol = conn.getHeaderField(0);
        if ((connection == null && (protocol == null || !protocol.startsWith(HTTPConstants.HTTP_1_1)))
                || (connection != null && connection.equalsIgnoreCase(HTTPConstants.CONNECTION_CLOSE))) {
            conn.disconnect();/*from w  w w  . ja va 2s  . co m*/
        } // TODO ? perhaps note connection so it can be disconnected at end
          // of test?
    }
}

From source file:org.apache.jmeter.protocol.http.sampler.HTTPJavaImpl.java

/**
 * Gets the ResponseHeaders from the URLConnection
 *
 * @param conn//from w w  w.  j  a v a 2  s.  c  o  m
 *            connection from which the headers are read
 * @return string containing the headers, one per line
 */
protected String getResponseHeaders(HttpURLConnection conn) {
    StringBuilder headerBuf = new StringBuilder();
    headerBuf.append(conn.getHeaderField(0));// Leave header as is
    // headerBuf.append(conn.getHeaderField(0).substring(0, 8));
    // headerBuf.append(" ");
    // headerBuf.append(conn.getResponseCode());
    // headerBuf.append(" ");
    // headerBuf.append(conn.getResponseMessage());
    headerBuf.append("\n"); //$NON-NLS-1$

    String hfk;
    for (int i = 1; (hfk = conn.getHeaderFieldKey(i)) != null; i++) {
        headerBuf.append(hfk);
        headerBuf.append(": "); // $NON-NLS-1$
        headerBuf.append(conn.getHeaderField(i));
        headerBuf.append("\n"); // $NON-NLS-1$
    }
    return headerBuf.toString();
}