优化导入逻辑，兼容含有BOM头的文件

models/BookModel.go

@@ -528,10 +528,11 @@ func (book *Book) ImportBook(zipPath string) error {
 				doc.Identify = docIdentify
 				//匹配图片，如果图片语法是在代码块中，这里同样会处理
 				re := regexp.MustCompile(`!\[(.*?)\]\((.*?)\)`)
-				markdown, err := ioutil.ReadFile(path)
+				markdown, err := filetil.ReadFileAndIgnoreUTF8BOM(path)
 				if err != nil {
 					return err
 				}
+
 				//处理图片
 				doc.Markdown = re.ReplaceAllStringFunc(string(markdown), func(image string) string {
 
@@ -720,6 +721,7 @@ func (book *Book) ImportBook(zipPath string) error {
 		beego.Error("导入项目异常 => ", err)
 		book.Description = "【项目导入存在错误：" + err.Error() + "】"
 	}
+	beego.Info("项目导入完毕 => ",book.BookName)
 	book.ReleaseContent(book.BookId)
 	return err
 }

utils/filetil/filetil.go

@@ -7,6 +7,8 @@ import (
 	"io"
 	"fmt"
 	"math"
+	"io/ioutil"
+	"bytes"
 )
 
 //==================================
@@ -217,4 +219,39 @@ func HasFileOfExt(path string,exts []string) bool {
 	})
 
 	return err == os.ErrExist
+}
+//忽略字符串中的BOM头
+func ReadFileAndIgnoreUTF8BOM(filename string) ([]byte,error) {
+
+	data,err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil,err
+	}
+	if data == nil {
+		return nil,nil
+	}
+	data = bytes.Replace(data,[]byte("\r"),[]byte(""),-1)
+	if len(data) >= 3 && data[0] == 0xef && data[1] == 0xbb && data[2] == 0xbf {
+		return data[3:],err
+	}
+
+
+	return data,nil
+
+	//fd, err := os.Open(filename)
+	//
+	//if err != nil {
+	//	return nil,err
+	//}
+	//bom := [3]byte{}
+	//
+	//_, err = io.ReadFull(fd, bom[:])
+	//if err != nil {
+	//	return nil,err
+	//}
+	//if bom[0] != 0xef || bom[1] != 0xbb || bom[2] != 0xbf {
+	//	_, err = fd.Seek(0, 0)
+	//}
+	//
+	//return ioutil.ReadAll(fd)
 }