Example usage for java.net HttpURLConnection getHeaderField

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.gsoc.ijosa.liquidgalaxycontroller.PW.NearbyBeaconsFragment.java

private String getFileName(HttpURLConnection urlConnection) {
    try {//from   ww  w .jav  a 2s. c om
        String fileName = "";
        String raw = urlConnection.getHeaderField("Content-Disposition");
        // raw = "attachment; filename=abc.jpg"
        if (raw != null && raw.contains("=")) {
            fileName = raw.split("=")[1]; //getting value after '='
            fileName = fileName.split(";")[0];
        } else {
            // fall back to random generated file name?
        }
        return fileName.replaceAll("\"", "");
    } catch (Exception e) {
        e.printStackTrace();
        return "unknowFileName";
    }
}

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From source file:org.eclipse.rdf4j.http.server.ProtocolTest.java

/**
 * Checks that the requested content type is returned when accept header explicitly set.
 *//*from  www .  j a  v  a2s .  co  m*/
@Test
public void testContentTypeForGraphQuery1_GET() throws Exception {
    String query = "DESCRIBE <foo:bar>";
    String location = TestServer.REPOSITORY_URL;
    location += "?query=" + URLEncoder.encode(query, "UTF-8");

    URL url = new URL(location);

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

    // Request RDF/XML formatted results:
    conn.setRequestProperty("Accept", RDFFormat.RDFXML.getDefaultMIMEType());

    conn.connect();

    try {
        int responseCode = conn.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            String contentType = conn.getHeaderField("Content-Type");
            assertNotNull(contentType);

            // snip off optional charset declaration
            int charPos = contentType.indexOf(";");
            if (charPos > -1) {
                contentType = contentType.substring(0, charPos);
            }

            assertEquals(RDFFormat.RDFXML.getDefaultMIMEType(), contentType);
        } else {
            String response = "location " + location + " responded: " + conn.getResponseMessage() + " ("
                    + responseCode + ")";
            fail(response);
            throw new RuntimeException(response);
        }
    } finally {
        conn.disconnect();
    }
}

---

From source file:uk.ac.ucl.excites.sapelli.collector.util.AsyncDownloader.java

private boolean download(String downloadUrl) {
    if (downloadUrl == null || downloadUrl.isEmpty()) {
        failure = new Exception("No URL given!");
        return false;
    }/*from w  w w. j  av a 2  s. c o m*/

    //Log.d(getClass().getSimpleName(), "Download URL: " + downloadUrl);
    if (DeviceControl.isOnline(context)) {
        InputStream input = null;
        OutputStream output = null;
        try {
            URL url = new URL(downloadUrl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setInstanceFollowRedirects(false); // we handle redirects manually below (otherwise HTTP->HTTPS redirects don't work):
            conn.connect();

            // Detect & follow redirects:
            int status = conn.getResponseCode();
            //Log.d(getClass().getSimpleName(), "Response Code: " + status);
            if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM
                    || status == HttpURLConnection.HTTP_SEE_OTHER) { // follow redirect url from "location" header field
                String newUrl = conn.getHeaderField("Location");
                //Log.d(getClass().getSimpleName(), "Redirect to URL : " + newUrl);
                return download(newUrl);
            }

            // Getting file length
            final int fileLength = conn.getContentLength();
            publishProgress(fileLength < 0 ? // when fileLength = -1 this means the server hasn't specified the file length
                    -1 : // progressDialog will open and be set to indeterminate mode
                    0); // progressDialog will open and be set to 0

            // Input stream to read file - with 8k buffer
            input = new BufferedInputStream(url.openStream(), 8192);
            // Output stream to write file
            output = new BufferedOutputStream(new FileOutputStream(downloadedFile));

            byte data[] = new byte[1024];
            int total = 0;
            int percentage = 0;
            int bytesRead;
            while ((bytesRead = input.read(data)) != -1) {
                // Complete % completion:
                if (fileLength > 0) // don't divide by 0 and only update progress if we know the fileLength (i.e. != -1)
                {
                    int newPercentage = (int) ((total += bytesRead) / ((float) fileLength) * 100f);
                    if (newPercentage != percentage)
                        publishProgress(percentage = newPercentage);
                }

                // Write data to file...
                output.write(data, 0, bytesRead);
            }

            // Flush output:
            output.flush();
        } catch (Exception e) {
            failure = e;
            return false;
        } finally { // Close streams:
            StreamHelpers.SilentClose(input);
            StreamHelpers.SilentClose(output);
        }
        //Log.d(getClass().getSimpleName(), "Download done");
        return true;
    } else {
        failure = new Exception("The device is not online.");
        return false;
    }
}

---

From source file:org.jboss.aerogear.unifiedpush.SenderClient.java

/**
 * The actual method that does the real send and connection handling
 * //from   w  w w  .  j ava 2s  .  c  om
 * @param url the URL to use for the HTTP POST request.
 * @param jsonPayloadObject the JSON payload of the POST request
 * @param pushApplicationId the registered applications identifier.
 * @param masterSecret the master secret for the push server.
 * @param callback the {@link MessageResponseCallback} that will be called once the POST request completes.
 */
private void submitPayload(String url, String jsonPayloadObject, String pushApplicationId, String masterSecret,
        MessageResponseCallback callback) {
    String credentials = pushApplicationId + ':' + masterSecret;
    int statusCode;

    HttpURLConnection httpURLConnection = null;
    try {
        String encoded = Base64.encodeBytes(credentials.getBytes(UTF_8));

        // POST the payload to the UnifiedPush Server
        httpURLConnection = (HttpURLConnection) HttpClient.post(url, encoded, jsonPayloadObject, UTF_8, proxy,
                customTrustStore);

        statusCode = httpURLConnection.getResponseCode();
        logger.info(String.format("HTTP Response code from UnifiedPush Server: %s", statusCode));

        // if we got a redirect, let's extract the 'Location' header from the response
        // and submit the payload again
        if (isRedirect(statusCode)) {
            String redirectURL = httpURLConnection.getHeaderField("Location");
            logger.info(String.format("Performing redirect to '%s'", redirectURL));
            // execute the 'redirect'
            submitPayload(redirectURL, jsonPayloadObject, pushApplicationId, masterSecret, callback);
        } else {
            if (callback != null) {
                callback.onComplete(statusCode);
            }
        }

    } catch (Exception e) {
        logger.severe("Send did not succeed: " + e.getMessage());
        if (callback != null) {
            callback.onError(e);
        }
    } finally {
        // tear down
        if (httpURLConnection != null) {
            httpURLConnection.disconnect();
        }

    }
}

---

From source file:org.openestate.is24.restapi.DefaultClient.java

/**
 * Retrieve a {@link Response} from a request, that was sent through
 * {@link HttpURLConnection}./*from   w  w  w . j  a v a2s  .c o  m*/
 *
 * @param connection
 * {@link HttpURLConnection}, that contains the server response
 *
 * @return
 * {@link Response} of the request
 *
 * @throws IOException
 * if the {@link Response} can't be obtained
 */
protected Response createResponse(HttpURLConnection connection) throws IOException {
    InputStream responseInput = null;
    try {
        //String encoding = StringUtils.trimToNull( connection.getContentEncoding() );
        //if (encoding==null) encoding = getEncoding();
        String encoding = getEncoding();

        // read response body
        responseInput = new BufferedInputStream(connection.getInputStream());

        // possibly decompress response body from gzip
        if ("gzip".equalsIgnoreCase(connection.getContentEncoding()))
            responseInput = new GZIPInputStream(responseInput);

        // create response
        return new Response(connection.getResponseCode(), connection.getResponseMessage(),
                connection.getHeaderField(RESPONSE_HEADER_REQUEST_REFNUM),
                IOUtils.toString(responseInput, encoding));
    } finally {
        IOUtils.closeQuietly(responseInput);
        IOUtils.close(connection);
    }
}

---

From source file:org.eclipse.rdf4j.http.server.ProtocolTest.java

@Test
public void testQueryResponse_HEAD() throws Exception {
    String query = "DESCRIBE <foo:bar>";
    String location = TestServer.REPOSITORY_URL;
    location += "?query=" + URLEncoder.encode(query, "UTF-8");

    URL url = new URL(location);

    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("HEAD");

    // Request RDF/XML formatted results:
    conn.setRequestProperty("Accept", RDFFormat.RDFXML.getDefaultMIMEType());

    conn.connect();/*from w  w  w  .  ja va 2 s .  c o m*/

    try {
        int responseCode = conn.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            String contentType = conn.getHeaderField("Content-Type");
            assertNotNull(contentType);

            // snip off optional charset declaration
            int charPos = contentType.indexOf(";");
            if (charPos > -1) {
                contentType = contentType.substring(0, charPos);
            }

            assertEquals(RDFFormat.RDFXML.getDefaultMIMEType(), contentType);
            assertEquals(0, conn.getContentLength());
        } else {
            String response = "location " + location + " responded: " + conn.getResponseMessage() + " ("
                    + responseCode + ")";
            fail(response);
            throw new RuntimeException(response);
        }
    } finally {
        conn.disconnect();
    }
}

---

From source file:at.spardat.xma.boot.transport.HTTPTransport.java

/**
 *  Parses the cookies from the given connection and stores them in httpState.
 *  Invalid cookies are ignored and logged.
 *///from w w w .j ava2s  .  c om
private void readCookies(IRtXMASessionClient session, URL url, HttpURLConnection conn) {
    String headerName = "";
    for (int i = 1; headerName != null; i++) {
        headerName = conn.getHeaderFieldKey(i);
        if (Statics.HTTP_SET_COOKIE.equals(headerName)) {
            try {
                Cookie[] cookies = cookieSpec.parse(url.getHost(), getPort(url), url.getPath(),
                        "https".equals(url.getProtocol()), conn.getHeaderField(i));
                if (cookies != null) {
                    for (int j = 0; j < cookies.length; j++) {
                        try {
                            cookieSpec.validate(url.getHost(), getPort(url), url.getPath(),
                                    "https".equals(url.getProtocol()), cookies[j]);
                            getHttpState(session).addCookie(cookies[j]);
                            if (session != null && "JSESSIONID".equals(cookies[j].getName())) {
                                session.setId(cookies[j].getName() + "=" + cookies[j].getValue());
                            }
                        } catch (MalformedCookieException e) {
                            log_.log(LogLevel.WARNING, "cookie rejected: \""
                                    + cookieSpec.formatCookie(cookies[j]) + "\". " + e.getMessage());
                        }
                    }
                }
            } catch (MalformedCookieException e) {
                log_.log(LogLevel.WARNING,
                        "Invalid cookie header: \"" + conn.getHeaderField(i) + "\". " + e.getMessage());
            }
        }
    }
}

---

From source file:fi.cosky.sdk.API.java

private String readDataFromConnection(HttpURLConnection connection) {
    InputStream is = null;/*from ww  w . j  av  a 2  s. c  o  m*/
    BufferedReader br = null;
    StringBuilder sb = null;
    try {
        is = connection.getInputStream();
        br = new BufferedReader(new InputStreamReader(is));

        sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line).append("\n");
        }
        String eTag = null;
        if ((eTag = connection.getHeaderField("ETag")) != null) {
            sb.insert(sb.lastIndexOf("}"), ",\"VersionNumber\":" + eTag + "");
        }
    } catch (IOException e) {
        System.out.println("Could not read data from connection");
    }
    return sb.toString();
}

---

From source file:com.google.ytd.picasa.PicasaApiHelper.java

public PhotoEntry doResumableUpload(com.google.ytd.model.PhotoEntry photoEntry)
        throws IllegalArgumentException {
    if (util.isNullOrEmpty(photoEntry.getResumableUploadUrl())) {
        throw new IllegalArgumentException(String
                .format("No resumable upload URL found for " + "PhotoEntry id '%s'.", photoEntry.getId()));
    }//from  ww  w  .j a va  2 s .co  m

    try {
        URL url = new URL(photoEntry.getResumableUploadUrl());

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setInstanceFollowRedirects(false);
        connection.setConnectTimeout(CONNECT_TIMEOUT);
        connection.setReadTimeout(READ_TIMEOUT);
        connection.setRequestMethod("PUT");

        connection.setRequestProperty("Content-Range", "bytes */*");

        // Response code 308 is specific to this use case and doesn't appear to have a
        // HttpURLConnection constant.
        if (connection.getResponseCode() == 308) {
            long previousByte = 0;

            String rangeHeader = connection.getHeaderField("Range");
            if (!util.isNullOrEmpty(rangeHeader)) {
                LOG.info("Range header in 308 response is " + rangeHeader);

                String[] rangeHeaderSplits = rangeHeader.split("-", 2);
                if (rangeHeaderSplits.length == 2) {
                    previousByte = Long.valueOf(rangeHeaderSplits[1]).longValue() + 1;
                }
            }

            connection = (HttpURLConnection) url.openConnection();
            connection.setInstanceFollowRedirects(false);
            connection.setDoOutput(true);
            connection.setConnectTimeout(CONNECT_TIMEOUT);
            connection.setReadTimeout(READ_TIMEOUT);
            connection.setRequestMethod("PUT");

            byte[] bytes;
            String contentRangeHeader;

            if (photoEntry.getBlobKey() != null) {
                long lastByte = previousByte + CHUNK_SIZE;
                if (lastByte > (photoEntry.getOriginalFileSize() - 1)) {
                    lastByte = photoEntry.getOriginalFileSize() - 1;
                }

                contentRangeHeader = String.format("bytes %d-%d/%d", previousByte, lastByte,
                        photoEntry.getOriginalFileSize());

                BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
                bytes = blobstoreService.fetchData(photoEntry.getBlobKey(), previousByte, lastByte);
            } else {
                bytes = dataChunkDao.getBytes(photoEntry.getId(), previousByte);

                if (bytes == null) {
                    throw new IllegalArgumentException(String.format("PhotoEntry with id '%s' does not "
                            + "have a valid blob key. Additionally, there is no DataChunk entry for the "
                            + "initial byte '%d'.", photoEntry.getId(), previousByte));
                }

                contentRangeHeader = String.format("bytes %d-%d/%d", previousByte,
                        previousByte + bytes.length - 1, photoEntry.getOriginalFileSize());
            }

            connection.setRequestProperty("Content-Length", String.valueOf(bytes.length));

            LOG.info("Using the following for Content-Range header: " + contentRangeHeader);
            connection.setRequestProperty("Content-Range", contentRangeHeader);

            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(bytes);
            outputStream.close();

            if (connection.getResponseCode() == HttpURLConnection.HTTP_CREATED) {
                LOG.info("Resumable upload is complete and successful.");

                return (PhotoEntry) ParseUtil.readEntry(new ParseSource(connection.getInputStream()));
            }
        } else if (connection.getResponseCode() == HttpURLConnection.HTTP_CREATED) {
            // It's possible that the Picasa upload associated with the specific resumable upload URL
            // had previously completed successfully. In that case, the response to the initial */* PUT
            // will be a 201 Created with the new PhotoEntry. This is probably an edge case.
            LOG.info("Resumable upload is complete and successful.");

            return (PhotoEntry) ParseUtil.readEntry(new ParseSource(connection.getInputStream()));
        } else {
            // The IllegalArgumentException should be treated by the calling code as
            // something that is not recoverable, which is to say the resumable upload attempt
            // should be stopped.
            throw new IllegalArgumentException(String.format("HTTP POST to %s returned status %d (%s).",
                    url.toString(), connection.getResponseCode(), connection.getResponseMessage()));
        }
    } catch (MalformedURLException e) {
        LOG.log(Level.WARNING, "", e);

        throw new IllegalArgumentException(e);
    } catch (IOException e) {
        LOG.log(Level.WARNING, "", e);
    } catch (ServiceException e) {
        LOG.log(Level.WARNING, "", e);
    }

    return null;
}

---

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