/** 假定js都是只读的，如有更新必然体现在文件名上标记版本。 */
public void tryReloadJs() {
if (System.currentTimeMillis() - lastReloadTime < jsReloadPeriodMs) {
return;
}
lastReloadTime = System.currentTimeMillis();
Map<String, ChannelBuffer> newBufferMap = null; // = new HashMap<String, ChannelBuffer>();
for (File f : new File(confAdmin.getFullPathRelatedToConfRoot("js")).listFiles()) {
String name = f.getName();
if (name.endsWith(".js")) {
if (jsBufferMap.containsKey(name)) {
continue;
}
if (newBufferMap == null) {
newBufferMap = new HashMap<String, ChannelBuffer>(jsBufferMap);
}
// TODO: use new io
InputStream in = null;
try {
in = new FileInputStream(f);
ByteArrayOutputStream bao = new ByteArrayOutputStream();
GZIPOutputStreamEx gzo = new GZIPOutputStreamEx(bao, Deflater.BEST_COMPRESSION);
gzo.write(trackUrlExpBa);
byte[] buf = new byte[1024];
int c = 0;
while ((c = in.read(buf)) != -1) {
gzo.write(buf, 0, c);
}
gzo.close();
in.close();
byte[] ba = bao.toByteArray();
ChannelBuffer cbuf = ChannelBuffers.directBuffer(ba.length);
cbuf.writeBytes(ba);
newBufferMap.put(name, cbuf);
} catch (IOException e) { // never happen
log.error(e);
}
}
}
if (newBufferMap != null) {
jsBufferMap = newBufferMap;
}
}
public void handleJsRequest(String path, HttpRequest req, HttpResponse resp) {
if (req.containsHeader(IF_NONE_MATCH) || req.containsHeader(IF_MODIFIED_SINCE)) {
resp.setStatus(HttpResponseStatus.NOT_MODIFIED);
return;
}
String jsName = path.substring(1);
ChannelBuffer buf = jsBufferMap.get(jsName);
if (buf == null) {
tryReloadJs();
if (jsName == null) {
log.error("需要访问的JS名称为空。[req: " + req.getUri() + "]");
}
buf = jsBufferMap.get(jsName);
}
if (buf != null) {
resp.setContent(buf);
resp.setHeader(CONTENT_LENGTH, buf.capacity());
resp.setHeader(CONTENT_TYPE, "text/javascript; charset=UTF-8");
resp.setHeader(CONTENT_ENCODING, "gzip");
// resp.setHeader(EXPIRES, System.currentTimeMillis() + expired);
StringBuilder etagBuilder =
new StringBuilder("W/\"")
.append(buf.capacity())
.append("-")
.append(System.currentTimeMillis())
.append("\"");
resp.setHeader(ETAG, etagBuilder.toString());
LogRequestParser lrp = logRequestParserThreadLocal.get();
if (lrp == null) {
lrp = new LogRequestParser();
}
lrp.cdate.setTime(System.currentTimeMillis() + expired);
resp.setHeader(EXPIRES, lrp.sdf.format(lrp.cdate));
} else {
resp.setStatus(HttpResponseStatus.NOT_FOUND);
}
}