Merge pull request #15 from zr-hebo/capture-packet-rate

CapturePacketRate文档补充

communicator/config.go

@@ -29,5 +29,13 @@ func init() {
 	flag.IntVar(&communicatePort, "communicate_port", 8088, "http server port. Default is 8088")
 	flag.Float64Var(&catpurePacketRateVal, CAPTURE_PACKET_RATE, 1.0, "capture packet rate. Default is 1.0")
 
+	if err := catpurePacketRate.setVal(catpurePacketRateVal); err != nil {
+		panic(err.Error())
+	}
 	configMap = make(map[string]configItem)
+	regsiterConfig()
+}
+
+func regsiterConfig()  {
+	configMap[CAPTURE_PACKET_RATE] = catpurePacketRate
 }

communicator/major_function.go

@@ -4,11 +4,6 @@ import "fmt"
 
 // SetConfig set config by config key(name) and value
 func SetConfig(key string, val interface{}) (err error) {
-	if key == catpurePacketRate.name {
-		err = catpurePacketRate.setVal(val)
-		return
-	}
-
 	configMapLock.Lock()
 	defer configMapLock.Unlock()
 

docs/capture_rate.md

@@ -0,0 +1,14 @@
+## CapturePacketRate
+
+通过API可以动态获取或者设置抓包率，基于此项功能，sniffer提供了动态调整抓包率率的功能，比如在QPS低的时候设置抓包率为1，在QPS高的时候设置为0.01
+
+#### Get CapturePacketRate
+```
+curl 'http://127.0.0.1:8088/get_config?config_name=capture_packet_rate'
+```
+
+#### Set CapturePacketRate
+```
+curl -XPOST -d'{"config_name":"capture_packet_rate","value":0.8}' 'http://127.0.0.1:8088/set_config?config_name=capture_packet_rate'
+```
+