feat(span-name): add http.path to span name

kong/plugins/zipkin/handler.lua

@@ -124,10 +124,16 @@ if subsystem == "http" then
     if trace_id == nil then
       trace_id = rand_bytes(conf.traceid_byte_count)
     end
+
+    local span_format = method
+    local path = req.get_path()
+    if conf.span_display_path == true then
+      span_format = method .. ' ' .. path
+    end  
 
     local request_span = new_span(
       "SERVER",
-      method,
+      span_format,
       ngx_req_start_time_mu(),
       should_sample,
       trace_id,
@@ -140,7 +146,7 @@ if subsystem == "http" then
 
     request_span:set_tag("lc", "kong")
     request_span:set_tag("http.method", method)
-    request_span:set_tag("http.path", req.get_path())
+    request_span:set_tag("http.path", path)
 
     local static_tags = conf.static_tags
     if type(static_tags) == "table" then

kong/plugins/zipkin/schema.lua

@@ -60,6 +60,7 @@ return {
           { tags_header = { type = "string", required = true, default = "Zipkin-Tags" } },
           { static_tags = { type = "array", elements = static_tag,
                             custom_validator = validate_static_tags } },
+          { span_display_path = { type = "boolean", default = false } },
         },
     }, },
   },