diff --git a/build/darknet/x64/darknet_json_reslut.cmd b/build/darknet/x64/darknet_json_reslut.cmd
new file mode 100644
index 00000000..3ec6db73
--- /dev/null
+++ b/build/darknet/x64/darknet_json_reslut.cmd
@@ -0,0 +1,3 @@
+darknet.exe detector test cfg/coco.data cfg/yolov3.cfg yolov3.weights -ext_output -dont_show -out result.json < data/train.txt
+
+pause
\ No newline at end of file
diff --git a/src/detector.c b/src/detector.c
index 3ae5c0fa..2ae92ea7 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -1220,7 +1220,7 @@ void calc_anchors(char *datacfg, int num_of_clusters, int width, int height, int
 //#endif // OPENCV
 
 void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filename, float thresh,
-    float hier_thresh, int dont_show, int ext_output, int save_labels)
+    float hier_thresh, int dont_show, int ext_output, int save_labels, char *outfile)
 {
     list *options = read_data_cfg(datacfg);
     char *name_list = option_find_str(options, "names", "data/names.list");
@@ -1244,6 +1244,14 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
     double time;
     char buff[256];
     char *input = buff;
+    char *json_buf = NULL;
+    int json_image_id = 0;
+    FILE* json_file = NULL;
+    if (outfile) {
+        json_file = fopen(outfile, "wb");
+        char *tmp = "[\n";
+        fwrite(tmp, sizeof(char), strlen(tmp), json_file);
+    }
     int j;
     float nms = .45;    // 0.4F
     while (1) {
@@ -1256,7 +1264,7 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
             printf("Enter Image Path: ");
             fflush(stdout);
             input = fgets(input, 256, stdin);
-            if (!input) return;
+            if (!input) break;
             strtok(input, "\n");
         }
         image im = load_image(input, 0, 0, net.c);
@@ -1287,6 +1295,18 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
             show_image(im, "predictions");
         }
 
+        if (outfile) {
+            if (json_buf) {
+                char *tmp = ", \n";
+                fwrite(tmp, sizeof(char), strlen(tmp), json_file);
+            }
+            ++json_image_id;
+            json_buf = detection_to_json(dets, nboxes, l.classes, names, json_image_id, input);
+
+            fwrite(json_buf, sizeof(char), strlen(json_buf), json_file);
+            free(json_buf);
+        }
+
         // pseudo labeling concept - fast.ai
         if (save_labels)
         {
@@ -1327,6 +1347,12 @@ void test_detector(char *datacfg, char *cfgfile, char *weightfile, char *filenam
         if (filename) break;
     }
 
+    if (outfile) {
+        char *tmp = "\n]";
+        fwrite(tmp, sizeof(char), strlen(tmp), json_file);
+        fclose(json_file);
+    }
+
     // free memory
     free_ptrs(names, net.layers[net.n - 1].classes);
     free_list_contents_kvp(options);
@@ -1405,7 +1431,7 @@ void run_detector(int argc, char **argv)
         if (strlen(weights) > 0)
             if (weights[strlen(weights) - 1] == 0x0d) weights[strlen(weights) - 1] = 0;
     char *filename = (argc > 6) ? argv[6] : 0;
-    if (0 == strcmp(argv[2], "test")) test_detector(datacfg, cfg, weights, filename, thresh, hier_thresh, dont_show, ext_output, save_labels);
+    if (0 == strcmp(argv[2], "test")) test_detector(datacfg, cfg, weights, filename, thresh, hier_thresh, dont_show, ext_output, save_labels, outfile);
     else if (0 == strcmp(argv[2], "train")) train_detector(datacfg, cfg, weights, gpus, ngpus, clear, dont_show, calc_map);
     else if (0 == strcmp(argv[2], "valid")) validate_detector(datacfg, cfg, weights, outfile);
     else if (0 == strcmp(argv[2], "recall")) validate_detector_recall(datacfg, cfg, weights);
diff --git a/src/http_stream.cpp b/src/http_stream.cpp
index 1f6a7a4e..b4c88a32 100644
--- a/src/http_stream.cpp
+++ b/src/http_stream.cpp
@@ -274,8 +274,7 @@ public:
     void close_all()
     {
         close_all_sockets = 1;
-        char tmp[1];
-        write(tmp);
+        write("\n]");   // close JSON array
     }
 
     bool open(int port)
@@ -357,10 +356,26 @@ public:
                     "Content-Type: application/json\r\n"
                     //"Content-Type: multipart/x-mixed-replace; boundary=boundary\r\n"
                     "\r\n", 0);
+                _write(client, "[\n", 0);   // open JSON array
                 cerr << "JSON_sender: new client " << client << endl;
             }
             else // existing client, just stream pix
             {
+                //char head[400];
+                // application/x-resource+json or application/x-collection+json -  when you are representing REST resources and collections
+                // application/json or text/json or text/javascript or text/plain.
+                // https://stackoverflow.com/questions/477816/what-is-the-correct-json-content-type
+                //sprintf(head, "\r\nContent-Length: %zu\r\n\r\n", outlen);
+                //sprintf(head, "--boundary\r\nContent-Type: application/json\r\nContent-Length: %zu\r\n\r\n", outlen);
+                //_write(s, head, 0);
+                int n = _write(s, outputbuf, outlen);
+                if (n < outlen)
+                {
+                    cerr << "JSON_sender: kill client " << s << endl;
+                    ::shutdown(s, 2);
+                    FD_CLR(s, &master);
+                }
+
                 // Graceful closes will first close their output channels and then wait for the peer
                 // on the other side of the connection to close its output channels. When both sides are done telling
                 // each other they won’t be sending any more data (i.e., closing output channels),
@@ -372,24 +387,6 @@ public:
                     free(buf);
                     //::closesocket(s);
                     printf("JSON_sender: close clinet: %d \n", result);
-                    continue;
-                }
-
-                //char head[400];
-                // application/json
-                // application/x-resource+json or application/x-collection+json -  when you are representing REST resources and collections
-                // text/json or text/javascript or text/plain.
-                // https://stackoverflow.com/questions/477816/what-is-the-correct-json-content-type
-                //sprintf(head, "\r\nContent-Length: %zu\r\n\r\n", outlen);
-                //sprintf(head, "--boundary\r\nContent-Type: application/json\r\nContent-Length: %zu\r\n\r\n", outlen);
-                //_write(s, head, 0);
-                int n = _write(s, outputbuf, outlen);
-                //cerr << "known client " << s << " " << n << endl;
-                if (n < outlen)
-                {
-                    cerr << "JSON_sender: kill client " << s << endl;
-                    ::shutdown(s, 2);
-                    FD_CLR(s, &master);
                 }
             }
         }
@@ -401,7 +398,9 @@ public:
 void send_json(detection *dets, int nboxes, int classes, char **names, long long int frame_id, int port, int timeout)
 {
     static JSON_sender js(port, timeout);
-    char *send_buf = detection_to_json(dets, nboxes, classes, names, frame_id, NULL);
+    static char *send_buf = NULL;
+    if(send_buf) js.write(", \n");
+    send_buf = detection_to_json(dets, nboxes, classes, names, frame_id, NULL);
 
     js.write(send_buf);
     std::cout << " JSON-stream sent. \n";
diff --git a/src/network.c b/src/network.c
index 74ad70ed..4eeed0a8 100644
--- a/src/network.c
+++ b/src/network.c
@@ -705,7 +705,8 @@ char *detection_to_json(detection *dets, int nboxes, int classes, char **names,
             }
         }
     }
-    strcat(send_buf, "\n ] \n}, \n");
+    //strcat(send_buf, "\n ] \n}, \n");
+    strcat(send_buf, "\n ] \n}");
     return send_buf;
 }