Example usage for org.springframework.http HttpHeaders LAST_MODIFIED

Introduction

In this page you can find the example usage for org.springframework.http HttpHeaders LAST_MODIFIED.

Prototype

String LAST_MODIFIED

To view the source code for org.springframework.http HttpHeaders LAST_MODIFIED.

Click Source Link

Document

The HTTP Last-Modified header field name.

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//from  w ww  .j  a  v  a  2 s .c  o  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)]);
            }
        }
    }
}

---

From source file:net.turnbig.pandora.web.Servlets.java

/**
 * LastModified Header./* w  w w  .  j a va 2 s  . c o m*/
 */
public static void setLastModifiedHeader(HttpServletResponse response, long lastModifiedDate) {
    response.setDateHeader(HttpHeaders.LAST_MODIFIED, lastModifiedDate);
}

---