diff --git a/.gitignore b/.gitignore
index daf913b..6c65c5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,24 +1,16 @@
-# Compiled Object files, Static and Dynamic libs (Shared Objects)
-*.o
-*.a
-*.so
+.DS_Store
+.idea/
+.vscode/
 
-# Folders
-_obj
-_test
-
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
-
-*.cgo1.go
-*.cgo2.c
-_cgo_defun.c
-_cgo_gotypes.go
-_cgo_export.*
-
-_testmain.go
-
-*.exe
-*.test
-*.prof
+*~
+*/*.so
+*/*.so.*
+*.bak
+*.log
+*.log.*
+*.pem
+*.sublime-project
+*.sublime-workspace
+*.tmp
+*.txt
+*.upx
diff --git a/README.md b/README.md
index f0bd3ac..52cba0f 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,9 @@ filter.FindAll("这篇文章真的好垃圾")
 加载网络词库。
 
 ```go
-filter.LoadNetWordDict("https://raw.githubusercontent.com/importcjj/sensitive/master/dict/dict.txt")
+dictUrl := "https://raw.githubusercontent.com/importcjj/sensitive/master/dict/dict.txt"
+// filter.LoadNetWordDictTimeout(dictUrl, false, 5000)
+filter.LoadNetWordDict(dictUrl)
 ```
 
 #### UpdateNoisePattern
diff --git a/filter.go b/filter.go
index fed8b0e..1b577b8 100644
--- a/filter.go
+++ b/filter.go
@@ -2,23 +2,25 @@ package sensitive
 
 import (
 	"bufio"
+	"fmt"
 	"io"
 	"net/http"
 	"os"
 	"regexp"
+	"strings"
 	"time"
 )
 
 // Filter 敏感词过滤器
 type Filter struct {
-	trie  *Trie
 	noise *regexp.Regexp
+	*Trie
 }
 
 // New 返回一个敏感词过滤器
 func New() *Filter {
 	return &Filter{
-		trie:  NewTrie(),
+		Trie:  NewTrie(),
 		noise: regexp.MustCompile(`[\|\s&%$@*]+`),
 	}
 }
@@ -41,8 +43,13 @@ func (filter *Filter) LoadWordDict(path string) error {
 
 // LoadNetWordDict 加载网络敏感词字典
 func (filter *Filter) LoadNetWordDict(url string) error {
+	return filter.LoadNetWordDictTimeout(url, false, 5000)
+}
+
+// LoadNetWordDictTimeout 加载网络敏感词字典，带超时设置
+func (filter *Filter) LoadNetWordDictTimeout(url string, allowHtml bool, timeout int) error {
 	c := http.Client{
-		Timeout: 5 * time.Second,
+		Timeout: time.Duration(timeout) * time.Millisecond,
 	}
 	rsp, err := c.Get(url)
 	if err != nil {
@@ -50,6 +57,15 @@ func (filter *Filter) LoadNetWordDict(url string) error {
 	}
 	defer rsp.Body.Close()
 
+	if rsp.StatusCode >= 400 {
+		text := http.StatusText(rsp.StatusCode)
+		return fmt.Errorf(text)
+	} else if allowHtml == false {
+		value := strings.ToLower(rsp.Header.Get("Content-Type"))
+		if strings.Contains(value, "html") {
+			return fmt.Errorf("html is not allowed.")
+		}
+	}
 	return filter.Load(rsp.Body)
 }
 
@@ -64,7 +80,7 @@ func (filter *Filter) Load(rd io.Reader) error {
 			}
 			break
 		}
-		filter.trie.Add(string(line))
+		filter.Trie.Add(string(line))
 	}
 
 	return nil
@@ -72,42 +88,48 @@ func (filter *Filter) Load(rd io.Reader) error {
 
 // AddWord 添加敏感词
 func (filter *Filter) AddWord(words ...string) {
-	filter.trie.Add(words...)
+	filter.Trie.Add(words...)
 }
 
 // DelWord 删除敏感词
 func (filter *Filter) DelWord(words ...string) {
-	filter.trie.Del(words...)
+	filter.Trie.Del(words...)
 }
 
 // Filter 过滤敏感词
 func (filter *Filter) Filter(text string) string {
-	return filter.trie.Filter(text)
+	text = filter.RemoveNoise(text)
+	return filter.Trie.Filter(text)
 }
 
 // Replace 和谐敏感词
 func (filter *Filter) Replace(text string, repl rune) string {
-	return filter.trie.Replace(text, repl)
+	text = filter.RemoveNoise(text)
+	return filter.Trie.Replace(text, repl)
 }
 
 // FindIn 检测敏感词
 func (filter *Filter) FindIn(text string) (bool, string) {
 	text = filter.RemoveNoise(text)
-	return filter.trie.FindIn(text)
+	return filter.Trie.FindIn(text)
 }
 
 // FindAll 找到所有匹配词
 func (filter *Filter) FindAll(text string) []string {
-	return filter.trie.FindAll(text)
+	text = filter.RemoveNoise(text)
+	return filter.Trie.FindAll(text)
 }
 
 // Validate 检测字符串是否合法
 func (filter *Filter) Validate(text string) (bool, string) {
 	text = filter.RemoveNoise(text)
-	return filter.trie.Validate(text)
+	return filter.Trie.Validate(text)
 }
 
 // RemoveNoise 去除空格等噪音
 func (filter *Filter) RemoveNoise(text string) string {
+	if filter.noise.String() == "" { //空模式
+		return text
+	}
 	return filter.noise.ReplaceAllString(text, "")
 }
diff --git a/filter_test.go b/filter_test.go
index 033c098..7d08aa7 100644
--- a/filter_test.go
+++ b/filter_test.go
@@ -17,8 +17,8 @@ func TestLoadDict(t *testing.T) {
 }
 
 func TestLoadNetWordDict(t *testing.T) {
-	filter := New()
-	err := filter.LoadNetWordDict("https://raw.githubusercontent.com/importcjj/sensitive/master/dict/dict.txt")
+	filter, dictUrl := New(), "https://raw.githubusercontent.com/importcjj/sensitive/master/dict/dict.txt"
+	err := filter.LoadNetWordDict(dictUrl)
 	if err != nil {
 		t.Errorf("fail to load dict %v", err)
 	}