Example usage for javax.servlet.http HttpServletResponse SC_PRECONDITION

Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse SC_PRECONDITION_FAILED.

Prototype

int SC_PRECONDITION_FAILED

To view the source code for javax.servlet.http HttpServletResponse SC_PRECONDITION_FAILED.

Click Source Link

Document

Status code (412) indicating that the precondition given in one or more of the request-header fields evaluated to false when it was tested on the server.

Usage

From source file:org.gss_project.gss.server.rest.Webdav.java

/**
 * Check if the if-none-match condition is satisfied.
 *
 * @param request The servlet request we are processing
 * @param response The servlet response we are creating
 * @param file the file object/*from w  w w.  j  a v  a2 s.c  om*/
 * @param oldBody the old version of the file, if requested
 * @return boolean true if the resource meets the specified condition, and
 *         false if the condition is not satisfied, in which case request
 *         processing is stopped
 * @throws IOException
 */
private boolean checkIfNoneMatch(HttpServletRequest request, HttpServletResponse response, FileHeader file,
        FileBody oldBody) throws IOException {
    String eTag = getETag(file, oldBody);
    String headerValue = request.getHeader("If-None-Match");
    if (headerValue != null) {
        boolean conditionSatisfied = false;
        if (!headerValue.equals("*")) {
            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) {
            // For GET and HEAD, we should respond with 304 Not Modified.
            // For every other method, 412 Precondition Failed is sent
            // back.
            if ("GET".equals(request.getMethod()) || "HEAD".equals(request.getMethod())) {
                response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
                response.setHeader("ETag", getETag(file, oldBody));
                return false;
            }
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return false;
        }
    }
    return true;
}

From source file:org.gss_project.gss.server.rest.Webdav.java

/**
 * Check if the if-unmodified-since condition is satisfied.
 *
 * @param request The servlet request we are processing
 * @param response The servlet response we are creating
 * @param file the file object/*from  w w  w . ja  v a  2s .  c o m*/
 * @param oldBody the old version of the file, if requested
 * @return boolean true if the resource meets the specified condition, and
 *         false if the condition is not satisfied, in which case request
 *         processing is stopped
 * @throws IOException
 */
private boolean checkIfUnmodifiedSince(HttpServletRequest request, HttpServletResponse response,
        FileHeader file, FileBody oldBody) throws IOException {
    try {
        long lastModified = oldBody == null ? file.getAuditInfo().getModificationDate().getTime()
                : oldBody.getAuditInfo().getModificationDate().getTime();
        long headerValue = request.getDateHeader("If-Unmodified-Since");
        if (headerValue != -1)
            if (lastModified >= headerValue + 1000) {
                // The entity has not been modified since the date
                // specified by the client. This is not an error case.
                response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
                return false;
            }
    } catch (IllegalArgumentException illegalArgument) {
        return true;
    }
    return true;
}

Example usage for javax.servlet.http HttpServletResponse SC_PRECONDITION_FAILED

Introduction

Prototype

Document

Usage