实现编码转换测试

go.mod

@@ -7,4 +7,6 @@ require github.com/emersion/go-imap v1.0.4
 require (
 	github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394
 	github.com/emersion/go-message v0.11.2
+	golang.org/x/net v0.0.0-20200513185701-a91f0712d120
+	golang.org/x/text v0.3.2
 )

go.sum

@@ -19,6 +19,12 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20200513185701-a91f0712d120 h1:EZ3cVSzKOlJxAd8e8YAJ7no8nNypTxexh/YE/xW3ZEY=
+golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

tmpl/view.go

@@ -60,7 +60,9 @@ func RenderView(w http.ResponseWriter,render interface{}){
 			</tr>
 			<tr>
 			  <th scope="row">内容:</th>
-			  <td>{{.HtmlBody}}</td>
+			  <td>
+							{{.HtmlBody}}
+              </td>
 			</tr>
 		  </tbody>
 		</table>    

tools/imap.go

@@ -239,6 +239,7 @@ func GetMessage(server string, email string, password string,folder string,id ui
 			filename, _ := h.Filename()
 			log.Println("Got attachment: ", filename)
 		}
+		mailitem.Body=Encoding(mailitem.Body)
 	}
 	return mailitem
 }

tools/stringutil.go

@@ -1,6 +1,14 @@
 // stringutil 包含有用于处理字符串的工具函数。
 package tools
 
+import (
+	"golang.org/x/net/html/charset"
+	"golang.org/x/text/transform"
+	"io/ioutil"
+	"log"
+	"strings"
+)
+
 // Reverse 将其实参字符串以符文为单位左右反转。
 func Reverse(s string) string {
 	r := []rune(s)
@@ -9,3 +17,14 @@ func Reverse(s string) string {
 	}
 	return string(r)
 }
+//转换编码
+func Encoding(html string)string {
+	e,_,_ :=charset.DetermineEncoding([]byte(html),"")
+	r:=strings.NewReader(html)
+	log.Println(r);
+
+	utf8Reader := transform.NewReader(r,e.NewDecoder())
+	//将其他编码的reader转换为常用的utf8reader
+	all,_ := ioutil.ReadAll(utf8Reader)
+	return string(all)
+}