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:br.bireme.tb.URLS.java

/**
 * Given an url, loads its content (GET - method)
 * @param url url to be loaded/*  w w w. ja v  a2s  .  co m*/
 * @return an array with the real location of the page (in case of redirect)
 * and its content.
 * @throws IOException
 */
public static String[] loadPageGet(final URL url) throws IOException {
    if (url == null) {
        throw new NullPointerException("url");
    }
    System.out.print("loading page (GET) : [" + url + "]");
    HttpURLConnection.setFollowRedirects(false);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setRequestProperty("Accept-Charset", DEFAULT_ENCODING);
    connection.setRequestProperty("User-Agent", "curl/7.29.0");
    connection.setRequestProperty("Accept", "*/*");
    connection.connect();

    int respCode = connection.getResponseCode();
    final StringBuilder builder = new StringBuilder();
    String location = url.toString();

    while ((respCode >= 300) && (respCode <= 399)) {
        location = connection.getHeaderField("Location");
        connection = (HttpURLConnection) new URL(location).openConnection();
        respCode = connection.getResponseCode();
    }

    final boolean respCodeOk = (respCode == 200);
    final BufferedReader reader;
    boolean skipLine = false;

    if (respCodeOk) {
        reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), DEFAULT_ENCODING));
    } else {
        reader = new BufferedReader(new InputStreamReader(connection.getErrorStream(), DEFAULT_ENCODING));
    }

    while (true) {
        String line = reader.readLine();
        if (line == null) {
            break;
        }
        final String line2 = line.trim();

        if (line2.startsWith("<!--")) {
            if (line2.endsWith("-->")) {
                continue;
            }
            skipLine = true;
        } else if (line2.endsWith("-->")) {
            skipLine = false;
            line = "";
        }
        if (!skipLine) {
            builder.append(line);
            builder.append("\n");
        }
    }
    reader.close();
    connection.disconnect();

    if (!respCodeOk) {
        throw new IOException("url=[" + url + "]\ncode=" + respCode + "\n" + builder.toString());
    }
    //System.out.print("+");
    System.out.println(" - OK");

    return new String[] { location, builder.toString() };
}

From source file:com.romeikat.datamessie.core.base.service.download.AbstractDownloader.java

protected String getResponseUrl(final URLConnection urlConnection) throws IOException {
    if (!(urlConnection instanceof HttpURLConnection)) {
        return urlConnection.getURL().toExternalForm();
    }//from w  ww.  j a  va 2  s  . c o m
    final HttpURLConnection httpUrlConnection = (HttpURLConnection) urlConnection;
    httpUrlConnection.setInstanceFollowRedirects(false);
    final String responseUrl = httpUrlConnection.getHeaderField("Location");
    return responseUrl;
}

From source file:com.bnrc.util.AbFileUtil.java

/**
 * ????xx.??./*from  ww w  .  j  av a 2 s .c o m*/
 * @param connection ?
 * @return ??
 */
public static String getRealFileName(HttpURLConnection connection) {
    String name = null;
    try {
        if (connection == null) {
            return name;
        }
        if (connection.getResponseCode() == 200) {
            for (int i = 0;; i++) {
                String mime = connection.getHeaderField(i);
                if (mime == null) {
                    break;
                }
                // "Content-Disposition","attachment; filename=1.txt"
                // Content-Length
                if ("content-disposition".equals(connection.getHeaderFieldKey(i).toLowerCase())) {
                    Matcher m = Pattern.compile(".*filename=(.*)").matcher(mime.toLowerCase());
                    if (m.find()) {
                        return m.group(1).replace("\"", "");
                    }
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        AbLogUtil.e(AbFileUtil.class, "??");
    }
    return name;
}

From source file:net.sf.taverna.t2.reference.impl.external.http.HttpReference.java

@Override
public Long getApproximateSizeInBytes() {
    long now = currentTimeMillis();
    if (cachedLength != null && cacheTime != null && cacheTime.getTime() + CACHE_TIMEOUT > now)
        return cachedLength;
    try {/*from   www.  java 2  s. c o m*/
        HttpURLConnection c = (HttpURLConnection) httpUrl.openConnection();
        c.setRequestMethod("HEAD");
        c.connect();
        String lenString = c.getHeaderField("Content-Length");
        if (lenString != null && !lenString.isEmpty()) {
            cachedLength = new Long(lenString);
            cacheTime = new Date(now);
            return cachedLength;
        }
        // there is no Content-Length field so we cannot know the size
    } catch (Exception e) {
        // something went wrong, but we don't care what
    }
    cachedLength = null;
    cacheTime = null;
    return new Long(-1);
}

From source file:com.dv.Utils.DvFileUtil.java

/**
 * ???xx.??./*from   w ww.  j  a  va2s. c  o m*/
 * @param connection 
 * @return ??
 */
public static String getRealFileName(HttpURLConnection connection) {
    String name = null;
    try {
        if (connection == null) {
            return name;
        }
        if (connection.getResponseCode() == 200) {
            for (int i = 0;; i++) {
                String mime = connection.getHeaderField(i);
                if (mime == null) {
                    break;
                }
                // "Content-Disposition","attachment; filename=1.txt"
                // Content-Length
                if ("content-disposition".equals(connection.getHeaderFieldKey(i).toLowerCase())) {
                    Matcher m = Pattern.compile(".*filename=(.*)").matcher(mime.toLowerCase());
                    if (m.find()) {
                        return m.group(1).replace("\"", "");
                    }
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        DvLogUtil.e(DvFileUtil.class, "???");
    }
    return name;
}

From source file:org.apache.olingo.fit.tecsvc.http.BasicStreamITCase.java

@Test
public void streamESStreamJson() throws Exception {
    URL url = new URL(SERVICE_URI + "ESStream?$format=json");

    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod(HttpMethod.GET.name());
    connection.connect();//from w w w .jav a 2  s. c o m

    assertEquals(HttpStatusCode.OK.getStatusCode(), connection.getResponseCode());
    assertEquals(ContentType.JSON, ContentType.create(connection.getHeaderField(HttpHeader.CONTENT_TYPE)));

    final String content = IOUtils.toString(connection.getInputStream());

    assertTrue(content.contains("Streamed-Employee1@company.example\","
            + "\"Streamed-Employee2@company.example\"," + "\"Streamed-Employee3@company.example\""));
    assertTrue(content.contains("\"PropertyString\":\"TEST 1->streamed\""));
    assertTrue(content.contains("\"PropertyString\":\"TEST 2->streamed\""));
}

From source file:h2weibo.utils.filters.FlickrImageFilter.java

private String extraceFromShortURL(String input) {
    Pattern p = Pattern.compile("flic.kr/p/(\\w+)/?.*");
    Matcher m = p.matcher(input);
    if (m.find()) {
        input = "http://www.flickr.com/photo.gne?short=" + m.group(1);

        String imageUrl = null;/*from  www .  j  a  v  a 2  s  . co m*/
        try {
            URL url = new URL(input);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setInstanceFollowRedirects(false);
            conn.connect();
            int code = conn.getResponseCode();
            if (code == 302) {
                String loc = conn.getHeaderField("location");
                imageUrl = extraceFromFullURL("http://www.flickr.com" + loc);
            }
            conn.disconnect();
        } catch (Exception e) {
            log.error("Not able to handle flickr's short url/", e);
        }
        return imageUrl;
    } else {
        return null;
    }
}

From source file:cn.org.eshow.framwork.util.AbFileUtil.java

/**
 * ???xx.??.//from   www.  j  a  v  a2 s.  co  m
 * @param connection 
 * @return ??
 */
public static String getRealFileName(HttpURLConnection connection) {
    String name = null;
    try {
        if (connection == null) {
            return name;
        }
        if (connection.getResponseCode() == 200) {
            for (int i = 0;; i++) {
                String mime = connection.getHeaderField(i);
                if (mime == null) {
                    break;
                }
                // "Content-Disposition","attachment; filename=1.txt"
                // Content-Length
                if ("content-disposition".equals(connection.getHeaderFieldKey(i).toLowerCase())) {
                    Matcher m = Pattern.compile(".*filename=(.*)").matcher(mime.toLowerCase());
                    if (m.find()) {
                        return m.group(1).replace("\"", "");
                    }
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        AbLogUtil.e(AbFileUtil.class, "???");
    }
    return name;
}

From source file:org.omegat.gui.glossary.taas.TaaSClient.java

/**
 * Check content type of response.//from  w w  w .  j a  v  a2  s .  c  om
 */
void checkXMLContentType(HttpURLConnection conn) throws FormatError {
    String contentType = conn.getHeaderField("Content-Type");
    if (contentType == null) {
        throw new FormatError("Empty Content-Type header");
    }
    String ct = contentType.replace(" ", "").toLowerCase();
    if (!"text/xml".equals(ct) && !"application/xml".equals(ct)) {
        throw new FormatError("Wrong Content-Type header: " + contentType);
    }
}