add response callback

src/main/java/com/imyeyu/network/FileRequest.java

@@ -1,6 +1,7 @@
 package com.imyeyu.network;
 
 import com.imyeyu.io.IO;
+import com.imyeyu.java.bean.CallbackArg;
 import org.apache.hc.client5.http.fluent.Request;
 import org.apache.hc.core5.http.Header;
 import org.apache.hc.core5.http.HttpEntity;
@@ -59,6 +60,12 @@ public class FileRequest extends JacksonRequest {
 		return this;
 	}
 
+	@Override
+	public FileRequest responseCallback(CallbackArg<HttpResponse> callback) {
+		super.responseCallback(callback);
+		return this;
+	}
+
 	@Override
 	public FileRequest body(Object object) {
 		super.body(object);
@@ -84,15 +91,16 @@ public class FileRequest extends JacksonRequest {
 	}
 
 	public long length() throws IOException, ProtocolException {
-		HttpResponse response = request.execute().returnResponse();
-		final int status = response.getCode();
-		if (status < 200 || 300 <= status) {
-			throw new IOException("HTTP error status: " + status);
-		}
-		final Header contentLengthHeader = response.getHeader("Content-Length");
-		if (contentLengthHeader == null) {
-			throw new IOException("Content-Length header missing");
-		}
-		return Long.parseLong(contentLengthHeader.getValue());
+		return handleResponse(response -> {
+			final int status = response.getCode();
+			if (status < 200 || 300 <= status) {
+				throw new IOException("HTTP error status: " + status);
+			}
+			final Header contentLengthHeader = response.getHeader("Content-Length");
+			if (contentLengthHeader == null) {
+				throw new IOException("Content-Length header missing");
+			}
+			return Long.parseLong(contentLengthHeader.getValue());
+		});
 	}
 }