更新

@@ -8,6 +8,7 @@ type OssConfig struct {
 	bucketName  string
 	callbackUrl string
 	sessionName string
+	hostStr     string //host的格式为 bucketname.endpoint
 }
 
 func NewOssConfig() *OssConfig {
@@ -19,6 +20,7 @@ func NewOssConfig() *OssConfig {
 		callbackUrl: "",
 		endPoint:    "",
 		sessionName: "",
+		hostStr:     "",
 	}
 }
 

 package oss
 
+import (
+	"crypto/hmac"
+	"crypto/sha1"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"hash"
+	"io"
+	"time"
+)
+
 type PolicyToken struct {
 	AccessKeyId string `json:"accessid"`
 	Host        string `json:"host"`
@@ -10,54 +21,63 @@ type PolicyToken struct {
 	Callback    string `json:"callback"`
 }
 
+type PolicyConfigStruct struct {
+	Expiration string     `json:"expiration"`
+	Conditions [][]string `json:"conditions"`
+}
+
 type CallbackParam struct {
 	CallbackUrl      string `json:"callbackUrl"`
 	CallbackBody     string `json:"callbackBody"`
 	CallbackBodyType string `json:"callbackBodyType"`
 }
 
-// func get_policy_token() string {
-//     now := time.Now().Unix()
-//     expire_end := now + expire_time
-//     var tokenExpire = get_gmt_iso8601(expire_end)
+var (
+	// 用户上传文件时指定的文件夹。
+	upload_dir = "demo/"
+)
 
-//     //create post policy json
-//     var config ConfigStruct
-//     config.Expiration = tokenExpire
-//     var condition []string
-//     condition = append(condition, "starts-with")
-//     condition = append(condition, "$key")
-//     condition = append(condition, upload_dir)
-//     config.Conditions = append(config.Conditions, condition)
+func GetPolicyToken() string {
+	now := time.Now().Unix()
+	expire_end := now + 30
+	var tokenExpire = time.Unix(expire_end, 0).Format("2006-01-02T15:04:05Z")
 
-//     //calucate signature
-//     result,err:=json.Marshal(config)
-//     debyte := base64.StdEncoding.EncodeToString(result)
-//     h := hmac.New(func() hash.Hash { return sha1.New() }, []byte(accessKeySecret))
-//     io.WriteString(h, debyte)
-//     signedStr := base64.StdEncoding.EncodeToString(h.Sum(nil))
-
-//     var callbackParam CallbackParam
-//     callbackParam.CallbackUrl = callbackUrl
-//     callbackParam.CallbackBody = "filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}"
-//     callbackParam.CallbackBodyType = "application/x-www-form-urlencoded"
-//     callback_str,err:=json.Marshal(callbackParam)
-//     if err != nil {
-//         fmt.Println("callback json err:", err)
-//     }
-//     callbackBase64 := base64.StdEncoding.EncodeToString(callback_str)
-
-//     var policyToken PolicyToken
-//     policyToken.AccessKeyId = accessKeyId
-//     policyToken.Host = host
-//     policyToken.Expire = expire_end
-//     policyToken.Signature = string(signedStr)
-//     policyToken.Directory = upload_dir
-//     policyToken.Policy = string(debyte)
-//     policyToken.Callback = string(callbackBase64)
-//     response,err:=json.Marshal(policyToken)
-//     if err != nil {
-//         fmt.Println("json err:", err)
-//     }
-//     return string(response)
-// }
+	//create post policy json
+	var policyConfig PolicyConfigStruct
+	policyConfig.Expiration = tokenExpire
+	var condition []string
+	condition = append(condition, "starts-with")
+	condition = append(condition, "$key")
+	condition = append(condition, upload_dir)
+	policyConfig.Conditions = append(policyConfig.Conditions, condition)
+	ossConfig := NewOssConfig()
+	//calucate signature
+	result, err := json.Marshal(policyConfig)
+	debyte := base64.StdEncoding.EncodeToString(result)
+	h := hmac.New(func() hash.Hash { return sha1.New() }, []byte(ossConfig.accessKey))
+	io.WriteString(h, debyte)
+	signedStr := base64.StdEncoding.EncodeToString(h.Sum(nil))
+	var callbackParam CallbackParam
+	callbackParam.CallbackUrl = ossConfig.callbackUrl
+	callbackParam.CallbackBody = "filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}"
+	callbackParam.CallbackBodyType = "application/x-www-form-urlencoded"
+	callback_str, err := json.Marshal(callbackParam)
+	if err != nil {
+		fmt.Println("callback json err:", err)
+	}
+	callbackBase64 := base64.StdEncoding.EncodeToString(callback_str)
+	var policyToken PolicyToken
+	policyToken.AccessKeyId = ossConfig.accessID
+	policyToken.Host = ossConfig.hostStr
+	policyToken.Expire = expire_end
+	policyToken.Signature = string(signedStr)
+	//TODO 文件夹另外处理
+	policyToken.Directory = upload_dir
+	policyToken.Policy = string(debyte)
+	policyToken.Callback = string(callbackBase64)
+	response, err := json.Marshal(policyToken)
+	if err != nil {
+		fmt.Println("json err:", err)
+	}
+	return string(response)
+}