Fix lint of files in ./contrib/log/fluent (#1432)

* fix(transport/http):fix nil problem

* fix(contrib/log/fluent):part of #1430,fix ./contrib/log/fluent

contrib/log/fluent/fluent.go

@@ -102,30 +102,30 @@ type Logger struct {
 //   tcp://127.0.0.1:24224
 //   unix://var/run/fluent/fluent.sock
 func NewLogger(addr string, opts ...Option) (*Logger, error) {
-	options := options{}
+	option := options{}
 	for _, o := range opts {
-		o(&options)
+		o(&option)
 	}
 	u, err := url.Parse(addr)
 	if err != nil {
 		return nil, err
 	}
 	c := fluent.Config{
-		Timeout:            options.timeout,
+		Timeout:            option.timeout,
-		WriteTimeout:       options.writeTimeout,
+		WriteTimeout:       option.writeTimeout,
-		BufferLimit:        options.bufferLimit,
+		BufferLimit:        option.bufferLimit,
-		RetryWait:          options.retryWait,
+		RetryWait:          option.retryWait,
-		MaxRetry:           options.maxRetry,
+		MaxRetry:           option.maxRetry,
-		MaxRetryWait:       options.maxRetryWait,
+		MaxRetryWait:       option.maxRetryWait,
-		TagPrefix:          options.tagPrefix,
+		TagPrefix:          option.tagPrefix,
-		Async:              options.async,
+		Async:              option.async,
-		ForceStopAsyncSend: options.forceStopAsyncSend,
+		ForceStopAsyncSend: option.forceStopAsyncSend,
 	}
 	switch u.Scheme {
 	case "tcp":
-		host, port, err := net.SplitHostPort(u.Host)
+		host, port, err2 := net.SplitHostPort(u.Host)
-		if err != nil {
+		if err2 != nil {
-			return nil, err
+			return nil, err2
 		}
 		if c.FluentPort, err = strconv.Atoi(port); err != nil {
 			return nil, err
@@ -143,7 +143,7 @@ func NewLogger(addr string, opts ...Option) (*Logger, error) {
 		return nil, err
 	}
 	return &Logger{
-		opts: options,
+		opts: option,
 		log:  fl,
 	}, nil
 }

hack/.lintcheck_failures

@@ -11,4 +11,3 @@
 ./contrib/registry/kubernetes
 ./contrib/registry/zookeeper
 ./contrib/registry/etcd
-./contrib/log/fluent