in_http: add fluentd like add_remote_addr functionality

Signed-off-by: Alexandre Létourneau <letourneau.alexandre@gmail.com>

Author: aletourneau

plugins/in_http/http.c

@@ -207,6 +207,18 @@ static struct flb_config_map config_map[] = {
      NULL
     },
 
+    {
+     FLB_CONFIG_MAP_BOOL, "add_remote_addr", "false",
+     0, FLB_TRUE, offsetof(struct flb_http, add_remote_addr),
+     "Adds REMOTE_ADDR field to the record. The value of REMOTE_ADDR is the client's address."
+    },
+
+    {
+     FLB_CONFIG_MAP_STR, "remote_addr_key", REMOTE_ADDR_KEY,
+     0, FLB_TRUE, offsetof(struct flb_http, remote_addr_key),
+     "Key name for the remote address field added to the record."
+    },
+
     {
      FLB_CONFIG_MAP_SIZE, "buffer_max_size", HTTP_BUFFER_MAX_SIZE,
      0, FLB_TRUE, offsetof(struct flb_http, buffer_max_size),

plugins/in_http/http.h

@@ -32,6 +32,7 @@
 
 #define HTTP_BUFFER_MAX_SIZE    "4M"
 #define HTTP_BUFFER_CHUNK_SIZE  "512K"
+#define REMOTE_ADDR_KEY         "REMOTE_ADDR"
 
 struct flb_http {
     int successful_response_code;
@@ -47,6 +48,9 @@ struct flb_http {
 
     struct flb_input_instance *ins;
 
+    int add_remote_addr;
+    const char *remote_addr_key;
+
     /* New gen HTTP server */
     int enable_http2;
     struct flb_http_server http_server;