Example usage for javax.servlet RequestDispatcher INCLUDE_CONTEXT_PATH

Introduction

In this page you can find the example usage for javax.servlet RequestDispatcher INCLUDE_CONTEXT_PATH.

Prototype

String INCLUDE_CONTEXT_PATH

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Document

The name of the request attribute under which the context path of the target of an #include(ServletRequest,ServletResponse) include is stored

Usage

From source file:com.github.zhanhb.ckfinder.download.PathPartial.java

/**
 * Serve the specified resource, optionally including the data content.
 *
 * @param request The servlet request we are processing
 * @param response The servlet response we are creating
 * @param content Should the content be included?
 * @param path the resource to serve//ww  w .j  a  v  a2 s  . co  m
 *
 * @exception IOException if an input/output error occurs
 */
private void serveResource(HttpServletRequest request, HttpServletResponse response, boolean content, Path path)
        throws IOException, ServletException {
    ActionContext context = new ActionContext().put(HttpServletRequest.class, request)
            .put(HttpServletResponse.class, response).put(ServletContext.class, request.getServletContext())
            .put(Path.class, path);
    if (path == null) {
        notFound.handle(context);
        return;
    }
    BasicFileAttributes attr;
    try {
        attr = Files.readAttributes(path, BasicFileAttributes.class);
    } catch (IOException ex) {
        notFound.handle(context);
        return;
    }
    context.put(BasicFileAttributes.class, attr);

    boolean isError = response.getStatus() >= HttpServletResponse.SC_BAD_REQUEST;
    // Check if the conditions specified in the optional If headers are
    // satisfied.
    // Checking If headers
    boolean included = (request.getAttribute(RequestDispatcher.INCLUDE_CONTEXT_PATH) != null);
    String etag = this.eTag.getValue(context);
    if (!included && !isError && !checkIfHeaders(request, response, attr, etag)) {
        return;
    }
    // Find content type.
    String contentType = contentTypeResolver.getValue(context);
    // Get content length
    long contentLength = attr.size();
    // Special case for zero length files, which would cause a
    // (silent) ISE
    boolean serveContent = content && contentLength != 0;
    Range[] ranges = null;
    if (!isError) {
        if (useAcceptRanges) {
            // Accept ranges header
            response.setHeader(HttpHeaders.ACCEPT_RANGES, "bytes");
        }
        // Parse range specifier
        ranges = serveContent ? parseRange(request, response, attr, etag) : FULL;
        // ETag header
        response.setHeader(HttpHeaders.ETAG, etag);
        // Last-Modified header
        response.setDateHeader(HttpHeaders.LAST_MODIFIED, attr.lastModifiedTime().toMillis());
    }
    ServletOutputStream ostream = null;
    if (serveContent) {
        ostream = response.getOutputStream();
    }

    String disposition = contentDisposition.getValue(context);
    if (disposition != null) {
        response.setHeader(HttpHeaders.CONTENT_DISPOSITION, disposition);
    }

    // Check to see if a Filter, Valve of wrapper has written some content.
    // If it has, disable range requests and setting of a content length
    // since neither can be done reliably.
    if (isError || ranges == FULL) {
        // Set the appropriate output headers
        if (contentType != null) {
            log.debug("serveFile: contentType='{}'", contentType);
            response.setContentType(contentType);
        }
        if (contentLength >= 0) {
            setContentLengthLong(response, contentLength);
        }
        // Copy the input stream to our output stream (if requested)
        if (serveContent) {
            log.trace("Serving bytes");
            Files.copy(path, ostream);
        }
    } else if (ranges != null && ranges.length != 0) {
        // Partial content response.
        response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
        if (ranges.length == 1) {
            Range range = ranges[0];
            response.addHeader(HttpHeaders.CONTENT_RANGE, range.toString());
            long length = range.end - range.start + 1;
            setContentLengthLong(response, length);
            if (contentType != null) {
                log.debug("serveFile: contentType='{}'", contentType);
                response.setContentType(contentType);
            }
            if (serveContent) {
                try (InputStream stream = Files.newInputStream(path)) {
                    copyRange(stream, ostream, range, new byte[Math.min((int) length, 8192)]);
                }
            }
        } else {
            response.setContentType("multipart/byteranges; boundary=" + MIME_SEPARATION);
            if (serveContent) {
                copy(path, ostream, ranges, contentType, new byte[Math.min((int) contentLength, 8192)]);
            }
        }
    }
}

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From source file:org.ireland.jnetty.webapp.RequestDispatcherImpl.java

private void doInclude(HttpServletRequest request, HttpServletResponse response, HttpInvocation invocation)
        throws ServletException, IOException {

    //Wrap the request
    IncludeRequest wrequest = new IncludeRequest(request, response, invocation);

    // If we have already been include previously, then keep using the established
    // original value. Otherwise, this is the first include and we need to establish the values.
    // Note: the established value on the original request for pathInfo and
    // for queryString is allowed to be null, but cannot be null for the other values.
    if (request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI) == null) {
        // ?Include,
        wrequest.setAttribute(RequestDispatcher.INCLUDE_REQUEST_URI, request.getRequestURI());

        wrequest.setAttribute(RequestDispatcher.INCLUDE_CONTEXT_PATH, request.getContextPath());
        wrequest.setAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH, request.getServletPath());
        wrequest.setAttribute(RequestDispatcher.INCLUDE_PATH_INFO, request.getPathInfo());
        wrequest.setAttribute(RequestDispatcher.INCLUDE_QUERY_STRING, request.getQueryString());
    }/*  w ww  .  j  a v a2  s . co m*/

    boolean isValid = false;

    try {

        invocation.getFilterChainInvocation().service(wrequest, response);

        isValid = true;
    } finally {
        if (request.getAsyncContext() != null) {
            // An async request was started during the forward, don't close the
            // response as it may be written to during the async handling
            return;
        }

        // server/106r, ioc/0310
        if (isValid) {
            finishResponse(response);
        }
    }
}

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