Example usage for javax.servlet.http HttpServletRequest getHeader

Introduction

In this page you can find the example usage for javax.servlet.http HttpServletRequest getHeader.

Prototype

public String getHeader(String name);

Source Link

Document

Returns the value of the specified request header as a String.

Usage

From source file:ch.ralscha.extdirectspring.util.ExtDirectSpringUtil.java

/**
 * Checks etag and sends back HTTP status 304 if not modified. If modified sets
 * content type and content length, adds cache headers (
 * {@link #addCacheHeaders(HttpServletResponse, String, Integer)}), writes the data
 * into the {@link HttpServletResponse#getOutputStream()} and flushes it.
 *
 * @param request the HTTP servlet request
 * @param response the HTTP servlet response
 * @param data the response data//from   ww  w  .  j ava 2  s. com
 * @param contentType the content type of the data (i.e.
 * "application/javascript;charset=UTF-8")
 * @throws IOException
 */
public static void handleCacheableResponse(HttpServletRequest request, HttpServletResponse response,
        byte[] data, String contentType) throws IOException {
    String ifNoneMatch = request.getHeader("If-None-Match");
    String etag = "\"0" + DigestUtils.md5DigestAsHex(data) + "\"";

    if (etag.equals(ifNoneMatch)) {
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
        return;
    }

    response.setContentType(contentType);
    response.setContentLength(data.length);

    addCacheHeaders(response, etag, 6);

    @SuppressWarnings("resource")
    ServletOutputStream out = response.getOutputStream();
    out.write(data);
    out.flush();
}

From source file:BrowserDetect.java

/**
 * Check that the user-agent string indicates some minimum browser level
 * @param request The browsers request//from  w w w. j a va2s.c o m
 * @param requiredUserAgent The UA required. Currently this is major version only
 * @param requiredVersion The version required, or -1 if versions are not important
 * @return true iff the browser matches the spec.
 */
public static boolean atLeast(HttpServletRequest request, UserAgent requiredUserAgent, int requiredVersion) {
    String userAgent = request.getHeader("user-agent");
    int realVersion;

    switch (requiredUserAgent) {
    case IE:
        realVersion = getMajorVersionAssumingIE(userAgent);
        break;

    case Gecko:
        realVersion = getMajorVersionAssumingGecko(userAgent);
        break;

    case Opera:
        realVersion = getMajorVersionAssumingOpera(userAgent);
        break;

    case AppleWebKit:
        realVersion = getMajorVersionAssumingAppleWebKit(userAgent);
        break;

    default:
        throw new UnsupportedOperationException("Detection of " + requiredUserAgent + " is not supported yet.");
    }

    return realVersion >= requiredVersion;
}

From source file:com.ziduye.base.web.Servlets.java

/**
 * ?Ajax/*from   w  w  w  .jav  a  2  s. c o m*/
 * @param request
 */
public static boolean isAjaxRequest(HttpServletRequest request) {
    String accept = request.getHeader("accept");
    String xRequestedWith = request.getHeader("X-Requested-With");

    // ?
    return ((accept != null && accept.indexOf("application/json") != -1
            || (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)));
}

From source file:com.openkm.util.FormatUtil.java

/**
 * Detect if the current browser is a mobile one
 *///w  w w . j a va  2  s.  c  o m
public static final boolean isMobile(HttpServletRequest request) {
    String userAgent = request.getHeader("user-agent").toLowerCase();
    return userAgent.contains("android") || userAgent.contains("iphone") || userAgent.contains("ipad")
            || userAgent.contains("blackberry");
}

From source file:com.emaxcore.emaxdata.common.web.Servlets.java

/**
 * ?? If-None-Match Header, Etag?.//from w w  w  . jav a 2  s .com
 *
 * Etag, checkIfNoneMatchfalse, 304 not modify status.
 *
 * @param etag ETag.
 */
public static boolean checkIfNoneMatchEtag(HttpServletRequest request, HttpServletResponse response,
        String etag) {
    String headerValue = request.getHeader(HttpHeaders.IF_NONE_MATCH);
    if (headerValue != null) {
        boolean conditionSatisfied = false;
        if (!"*".equals(headerValue)) {
            StringTokenizer commaTokenizer = new StringTokenizer(headerValue, ",");
            while (!conditionSatisfied && commaTokenizer.hasMoreTokens()) {
                String currentToken = commaTokenizer.nextToken();
                if (currentToken.trim().equals(etag)) {
                    conditionSatisfied = true;
                }
            }
        } else {
            conditionSatisfied = true;
        }

        if (conditionSatisfied) {
            response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
            response.setHeader(HttpHeaders.ETAG, etag);
            return false;
        }
    }
    return true;
}

From source file:com.hbs.common.josn.JSONUtil.java

static boolean isGzipInRequest(HttpServletRequest request) {
    String header = request.getHeader("Accept-Encoding");
    return header != null && header.indexOf("gzip") >= 0;
}

From source file:com.asual.summer.core.RequestFilter.java

static String getHeader(HttpServletRequest request, String name) {
    if ("Accept".equals(name) && RequestUtils.isWebKit()) {
        return "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
    }//  w w  w .j a  v  a 2s. c om
    return request.getHeader(name);
}

From source file:jp.go.nict.langrid.servicesupervisor.ServiceSupervisor.java

private static String getProtocol(HttpServletRequest request) {
    String p = request.getHeader("X-Langrid-Protocol");
    if (p != null)
        return p;
    else/*w  w w . j  a v a2  s .com*/
        return Protocols.DEFAULT;
}

From source file:org.artifactory.webapp.servlet.RequestUtils.java

public static boolean isAuthHeaderPresent(HttpServletRequest request) {
    String header = request.getHeader("Authorization");
    if (header != null && header.startsWith("Basic ")) {
        String auth = header.substring(6);
        return !"Og==".equals(auth);
    }// www.  j a v  a 2 s  .  c o m

    return false;
}

From source file:com.ziduye.base.web.Servlets.java

/**
 * ?//  w ww  .  j a  v  a2  s  .c om
 * @param request
 * @param uri
 * @return
 */
public static boolean isPhoneRequest(HttpServletRequest request, String uri) {
    String userAgent = request.getHeader("USER-AGENT").toLowerCase();
    if (null == userAgent) {
        userAgent = "";
    }
    Matcher matcherPhone = phonePat.matcher(userAgent);
    if (matcherPhone.find()) {
        return true;
    } else {
        return false;
    }
}