static void sendError(HttpServerExchange exchange, boolean isGet, boolean encode, String msg) {
if (encode) {
try {
ModelNode response = new ModelNode();
response.set(msg);
ByteArrayOutputStream bout = new ByteArrayOutputStream();
response.writeBase64(bout);
byte[] bytes = bout.toByteArray();
exchange
.getResponseHeaders()
.put(Headers.CONTENT_TYPE, APPLICATION_DMR_ENCODED + ";" + UTF_8);
exchange.getResponseHeaders().put(Headers.CONTENT_LENGTH, String.valueOf(bytes.length));
exchange.setResponseCode(500);
exchange.getResponseSender().send(new String(bytes), IoCallback.END_EXCHANGE);
} catch (IOException e) {
// fallback, should not happen
sendError(exchange, isGet, false, msg);
}
} else {
byte[] bytes = msg.getBytes();
exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, TEXT_PLAIN + ";" + UTF_8);
exchange.getResponseHeaders().put(Headers.CONTENT_LENGTH, String.valueOf(bytes.length));
exchange.setResponseCode(500);
exchange.getResponseSender().send(msg, IoCallback.END_EXCHANGE);
}
}
/**
* Writes the HTTP response to the output stream.
*
* @param http The HttpExchange object that allows access to the request and response.
* @param isGet Flag indicating whether or not the request was a GET request or POST request.
* @param pretty Flag indicating whether or not the output, if JSON, should be pretty printed or
* not.
* @param response The DMR response from the operation.
* @param status The HTTP status code to be included in the response.
* @param encode Flag indicating whether or not to Base64 encode the response payload.
* @throws IOException if an error occurs while attempting to generate the HTTP response.
*/
private void writeResponse(
final HttpExchange http,
boolean isGet,
boolean pretty,
ModelNode response,
int status,
boolean encode,
String contentType)
throws IOException {
final Headers responseHeaders = http.getResponseHeaders();
responseHeaders.add(CONTENT_TYPE, contentType);
http.sendResponseHeaders(status, 0);
final OutputStream out = http.getResponseBody();
final PrintWriter print = new PrintWriter(out);
// GET (read) operations will never have a compensating update, and the status is already
// available via the http response status code, so unwrap them.
if (isGet && status == OK) response = response.get("result");
try {
if (encode) {
response.writeBase64(out);
} else {
response.writeJSONString(print, !pretty);
}
} finally {
print.flush();
out.flush();
safeClose(print);
safeClose(out);
}
}
@Override
public long getContentLength() {
// Needed for the http client
final ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
model.writeBase64(os);
return os.size();
} catch (Exception e) {
return -1;
}
}
@Override
public void writeTo(OutputStream out) throws IOException {
model.writeBase64(out);
}