@Override
protected void writeLayer(
SlingHttpServletRequest req, SlingHttpServletResponse resp, ImageContext c, Layer layer)
throws IOException, RepositoryException {
Image image = new Image(c.resource);
if (!image.hasContent()) {
resp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
// get style and set constraints
image.loadStyleData(c.style);
// get pure layer
layer = image.getLayer(false, false, false);
boolean modified = false;
if (layer != null) {
// crop
modified = image.crop(layer) != null;
// rotate
modified |= image.rotate(layer) != null;
// resize
modified |= image.resize(layer) != null;
// apply diff if needed (because we create the layer inline)
modified |= applyDiff(layer, c);
}
// don't cache images on authoring instances
// Cache-Control: no-cache allows caching (e.g. in the browser cache) but
// will force revalidation using If-Modified-Since or If-None-Match every time,
// avoiding aggressive browser caching
if (!WCMMode.DISABLED.equals(WCMMode.fromRequest(req))) {
resp.setHeader("Cache-Control", "no-cache");
}
if (modified) {
String mimeType = image.getMimeType();
if (ImageHelper.getExtensionFromType(mimeType) == null) {
// get default mime type
mimeType = "image/png";
}
resp.setContentType(mimeType);
layer.write(mimeType, mimeType.equals("image/gif") ? 255 : 1.0, resp.getOutputStream());
} else {
// do not re-encode layer, just spool
Property data = image.getData();
InputStream in = data.getStream();
resp.setContentLength((int) data.getLength());
resp.setContentType(image.getMimeType());
IOUtils.copy(in, resp.getOutputStream());
in.close();
}
resp.flushBuffer();
}
@Override
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response)
throws ServletException, IOException {
RequestParameter p = request.getRequestParameter("p");
if (p == null) {
// Send out the categories.
sendIndex(response);
} else if ("style".equals(p.getString())) {
// Send out the CSS file
if (style == null) {
InputStream in = this.getClass().getResourceAsStream("style.css");
style = IOUtils.toByteArray(in);
in.close();
}
response.setContentType("text/css; charset=UTF-8");
response.setContentLength(style.length);
response.getOutputStream().write(style);
}
}