private boolean needZoom(File file, Resize resize) {
if (!resize.isForce()) {
int size = resize.getSize();
try {
ImageInfo info = im4javas.read(file);
if (info.getHeight() < size && info.getWidth() < size) {
return false;
}
} catch (BadImageException e) {
throw new SystemException(e.getMessage(), e);
}
}
return true;
}
private Resize parseSize(String _size) {
if (Validators.isEmptyOrNull(_size, true)) {
return null;
} else {
boolean force = false;
int pos = _size.indexOf("!");
if (pos != -1) {
force = true;
}
String strSize = pos == -1 ? _size : _size.substring(0, pos);
try {
int size = Integer.parseInt(strSize);
Resize resize = new Resize();
resize.setForce(force);
resize.setSize(size);
return resize;
} catch (Exception e) {
throw new InvalidParamException();
}
}
}
@RequestMapping(value = "{storeId}/{y}/{m}/{d}/{name}/{ext}/{size}", method = RequestMethod.GET)
public void write(
@PathVariable("storeId") int storeId,
@PathVariable("y") String y,
@PathVariable("m") String m,
@PathVariable("d") String d,
@PathVariable("name") String name,
@PathVariable("ext") String ext,
@PathVariable("size") String size,
ServletWebRequest request,
HttpServletResponse response)
throws MyFileNotFoundException {
String path =
File.separator
+ y
+ File.separator
+ m
+ File.separator
+ d
+ File.separator
+ name
+ "."
+ ext;
if (!Webs.isSafeFilePath(path)) {
throw new InvalidParamException();
}
FileWriteConfig config = getFileWriteConfig(name);
RequestMatcher matcher = config.getRequestMatcher();
// 防盗链
if (matcher != null && !matcher.matches(request.getRequest())) {
throw new MyFileNotFoundException();
}
LocalFileStorage store = seek(storeId);
File seek = store.seek(path);
boolean isImage = Webs.isWebImage("." + ext);
if (!isImage) {
response.setContentLength((int) seek.length());
response.setStatus(HttpServletResponse.SC_OK);
response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
response.setHeader("Content-Disposition", "attachment;filename=" + seek.getName());
try {
OutputStream out = response.getOutputStream();
FileUtils.copyFile(seek, out);
} catch (IOException e) {
}
return;
}
if (!isModified(request)) {
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
}
StringBuilder sb = new StringBuilder(imageCacheDir);
Resize format = parseSize(size);
ImageZoomMatcher zm = config.getZoomMatcher();
boolean zoom = format != null && zm.zoom(format.getSize(), seek) && needZoom(seek, format);
String _path = path;
if (zoom) {
_path = Files.appendFilename(_path, "_", format.getSize());
}
sb.append(_path);
boolean supportWebp = (this.supportWebp && supportWebp(request.getRequest(), path));
if (supportWebp) {
sb.append(".").append(WEBP);
}
String absPath = sb.toString();
String etag = Webs.generatorETag(absPath);
if (request.checkNotModified(etag)) {
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
}
File file = new File(absPath);
if (!file.exists()) {
Files.forceMkdir(file.getParentFile());
response.setContentType(URLConnection.guessContentTypeFromName(path));
if (!zoom && !supportWebp) {
file = seek;
} else {
synchronized (this) {
if (!file.exists()) {
if (supportWebp) {
response.setContentType(WEBP_CONTENT_TYPE);
try {
im4javas.format(seek, new File(Files.getFilename(absPath)), WEBP);
} catch (Exception e) {
throw new SystemException(e);
}
seek = file;
}
if (zoom) {
try {
im4javas.zoom(seek, file, format);
} catch (Exception e) {
throw new SystemException(e);
}
}
}
}
}
}
response.setContentLength((int) file.length());
response.addDateHeader("Last-Modified", System.currentTimeMillis());
response.addDateHeader("Expires", System.currentTimeMillis() + maxAge * 1000);
response.setHeader("Cache-Control", "max-age=" + maxAge);
response.setStatus(HttpServletResponse.SC_OK);
try {
OutputStream out = response.getOutputStream();
FileUtils.copyFile(file, out);
} catch (IOException e) {
}
}