/** {@inheritDoc} */
@Override
public ByteBuffer makeResponse(final GridRestResponse restRes, List<String> params) {
if (restRes.getResponse() == null) return GridRedisProtocolParser.toBulkString("");
if (restRes.getResponse() instanceof String) {
String res = String.valueOf(restRes.getResponse());
int startOff;
int endOff;
try {
startOff = boundedStartOffset(Integer.parseInt(params.get(START_OFFSET_POS)), res.length());
endOff = boundedEndOffset(Integer.parseInt(params.get(END_OFFSET_POS)), res.length());
} catch (NumberFormatException e) {
U.error(log, "Erroneous offset", e);
return GridRedisProtocolParser.toGenericError("Offset is not an integer");
}
return GridRedisProtocolParser.toBulkString(res.substring(startOff, endOff));
} else
return GridRedisProtocolParser.toTypeError(
"Operation against a key holding the wrong kind of value");
}
/**
* Process HTTP request.
*
* @param act Action.
* @param req Http request.
* @param res Http response.
*/
private void processRequest(String act, HttpServletRequest req, HttpServletResponse res) {
res.setContentType("application/json");
res.setCharacterEncoding("UTF-8");
GridRestCommand cmd = command(req);
if (cmd == null) {
res.setStatus(HttpServletResponse.SC_BAD_REQUEST);
return;
}
if (!authChecker.apply(req.getHeader("X-Signature"))) {
res.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
return;
}
GridRestResponse cmdRes;
Map<String, Object> params = parameters(req);
try {
GridRestRequest cmdReq = createRequest(cmd, params, req);
if (log.isDebugEnabled()) log.debug("Initialized command request: " + cmdReq);
cmdRes = hnd.handle(cmdReq);
if (cmdRes == null)
throw new IllegalStateException("Received null result from handler: " + hnd);
byte[] sesTok = cmdRes.sessionTokenBytes();
if (sesTok != null) cmdRes.setSessionToken(U.byteArray2HexString(sesTok));
res.setStatus(HttpServletResponse.SC_OK);
} catch (Throwable e) {
res.setStatus(HttpServletResponse.SC_OK);
U.error(log, "Failed to process HTTP request [action=" + act + ", req=" + req + ']', e);
cmdRes = new GridRestResponse(STATUS_FAILED, e.getMessage());
if (e instanceof Error) throw (Error) e;
}
String json;
try {
json = jsonMapper.writeValueAsString(cmdRes);
} catch (JsonProcessingException e1) {
U.error(log, "Failed to convert response to JSON: " + cmdRes, e1);
GridRestResponse resFailed = new GridRestResponse(STATUS_FAILED, e1.getMessage());
try {
json = jsonMapper.writeValueAsString(resFailed);
} catch (JsonProcessingException e2) {
json = "{\"successStatus\": \"1\", \"error:\" \"" + e2.getMessage() + "\"}}";
}
}
try {
if (log.isDebugEnabled()) log.debug("Parsed command response into JSON object: " + json);
res.getWriter().write(json);
if (log.isDebugEnabled())
log.debug(
"Processed HTTP request [action=" + act + ", jsonRes=" + cmdRes + ", req=" + req + ']');
} catch (IOException e) {
U.error(log, "Failed to send HTTP response: " + json, e);
}
}