Example usage for javax.servlet.http HttpServletRequest getHeader

List of usage examples for javax.servlet.http HttpServletRequest getHeader

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  6. 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:com.dosport.system.utils.ServletUtils.java

/**
 * ?? If-None-Match Header, Etag?./*from   w ww  . ja v  a 2s . co  m*/
 * 
 * Etag, checkIfNoneMatchfalse, 304 not modify status.
 * 
 * @param etag
 *            ETag.
 */
public static boolean checkIfNoneMatchEtag(HttpServletRequest request, HttpServletResponse response,
        String etag) {
    String headerValue = request.getHeader("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("ETag", etag);
            return false;
        }
    }
    return true;
}

From source file:com.core.util.Servlets.java

/**
 * ?Ajax//from  w w  w .  j a  va  2  s.  co m
 * @param request
 */
public static boolean isAjaxRequest(HttpServletRequest request) {

    String accept = request.getHeader("accept");
    String xRequestedWith = request.getHeader("X-Requested-With");
    Principal principal = (Principal) SecurityUtils.getSubject().getPrincipal();
    // ?
    return ((accept != null && accept.indexOf("application/json") != -1
            || (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)
            || (principal != null)));
}

From source file:net.duckling.ddl.web.bean.NginxAgent.java

/**
 * X-Accel-Redirectnignx/*from   ww w .jav a  2 s.c o  m*/
 * @param req
 * @param resp
 * @param fileName
 * @param fileSize
 * @param url
 */
public static void setRedirectUrl(HttpServletRequest req, HttpServletResponse resp, String fileName,
        long fileSize, String url) {
    if (fileSize > 0) {
        resp.addHeader(X_ACCEL_REDIRECT, url + "?agent="
                + Browser.recognizeBrowser(req.getHeader("USER-AGENT")).toString().toLowerCase());
    }

    // x_accel_redirect to nginx-clbs (gridfs) that
    // doesn't include Content-Disposition.
    // Set it here and the headers will be combined.
    resp.setHeader("Content-Disposition", Browser.encodeFileName(req.getHeader("USER-AGENT"), fileName));

}

From source file:org.ambraproject.wombat.util.HttpMessageUtil.java

/**
 * Checks to see if we should serve the contents of the requested object, or just return a 304 response with no body,
 * based on cache-related request headers.
 *
 * @param request      HttpServletRequest we will check for cache headers
 * @param lastModified last modified timestamp of the actual resource on the server
 * @param etag         etag generated from the actual resource on the server
 * @return true if we should serve the bytes of the resource, false if we should return 304.
 *///ww  w.j a  va  2 s.c o m
public static boolean checkIfModifiedSince(HttpServletRequest request, Long lastModified, String etag) {

    // Let the Etag-based header take precedence over If-Modified-Since.
    String etagFromRequest = request.getHeader("If-None-Match");
    if (etag != null && etagFromRequest != null) {
        return !etagFromRequest.equals(etag);
    } else {
        return lastModified == null || lastModified > request.getDateHeader("If-Modified-Since");
    }
}

From source file:com.fsnip.jg.common.web.Servlets.java

/**
 * ?Ajax/*from w ww . ja v 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 false;
    //      Principal principal = UserUtils.getPrincipal();
    //
    //      // ?
    //      return ((accept != null && accept.indexOf("application/json") != -1
    //         || (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)
    //         || (principal != null && principal.isMobileLogin())));
}

From source file:com.wk.common.web.Servlets.java

/**
 * ?Ajax/*from w  w w .j  a  va 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");
    //      Principal principal = UserUtils.getPrincipal();

    // ?

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

From source file:de.mpg.escidoc.services.fledgeddata.webservice.oaiServlet.java

/**
 * Get a response Writer depending on acceptable encodings
 * @param request the servlet's request information
 * @param response the servlet's response information
 * @exception IOException an I/O error occurred
 *///from   w  w w . j a va  2s . c om
public static Writer getWriter(HttpServletRequest request, HttpServletResponse response) throws IOException {
    Writer out;
    String encodings = request.getHeader("Accept-Encoding");

    if (encodings != null && encodings.indexOf("gzip") != -1) {
        response.setHeader("Content-Encoding", "gzip");
        out = new OutputStreamWriter(new GZIPOutputStream(response.getOutputStream()), "UTF-8");
    } else if (encodings != null && encodings.indexOf("deflate") != -1) {
        response.setHeader("Content-Encoding", "deflate");
        out = new OutputStreamWriter(new DeflaterOutputStream(response.getOutputStream()), "UTF-8");
    } else {
        out = response.getWriter();
    }
    return out;
}

From source file:com.mt86.jweb.common.web.Servlets.java

/**
 * ?Ajax/*from w  w w .  j  a  v  a2s . c o  m*/
 * @param request
 */
public static boolean isAjaxRequest(HttpServletRequest request) {

    String accept = request.getHeader("accept");
    String xRequestedWith = request.getHeader("X-Requested-With");
    Principal principal = UserUtils.getPrincipal();

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

From source file:club.crazypenguin.common.web.Servlets.java

/**
 * ?Ajax/*from   w  w w .j av a2  s.co  m*/
 * @param request
 */
public static boolean isAjaxRequest(HttpServletRequest request) {

    String accept = request.getHeader("accept");
    String xRequestedWith = request.getHeader("X-Requested-With");
    SystemAuthorizingRealm.Principal principal = UserUtils.getPrincipal();

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

From source file:com.handpay.ibenefit.framework.util.WebUtils.java

public static boolean checkIfNoneMatchEtag(HttpServletRequest request, HttpServletResponse response,
        String etag) {/*from   www  .  ja  va 2  s.co  m*/
    String headerValue = request.getHeader("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("ETag", etag);
            return false;
        }
    }
    return true;
}