使用github的七牛SDK，配置名称Kodo->Qiniu

vendor/github.com/qiniu/api.v7/storage/token.go

@@ -0,0 +1,73 @@
+package storage
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"strings"
+	"time"
+
+	"github.com/qiniu/api.v7/auth/qbox"
+)
+
+// PutPolicy 表示文件上传的上传策略
+type PutPolicy struct {
+	Scope               string `json:"scope"`
+	Expires             uint32 `json:"deadline"` // 截止时间（以秒为单位）
+	IsPrefixalScope     int    `json:"isPrefixalScope,omitempty"`
+	InsertOnly          uint16 `json:"insertOnly,omitempty"` // 若非0, 即使Scope为 Bucket:Key 的形式也是insert only
+	DetectMime          uint8  `json:"detectMime,omitempty"` // 若非0, 则服务端根据内容自动确定 MimeType
+	FsizeLimit          int64  `json:"fsizeLimit,omitempty"`
+	MimeLimit           string `json:"mimeLimit,omitempty"`
+	SaveKey             string `json:"saveKey,omitempty"`
+	CallbackFetchKey    uint8  `json:"callbackFetchKey,omitempty"`
+	CallbackURL         string `json:"callbackUrl,omitempty"`
+	CallbackHost        string `json:"callbackHost,omitempty"`
+	CallbackBody        string `json:"callbackBody,omitempty"`
+	CallbackBodyType    string `json:"callbackBodyType,omitempty"`
+	ReturnURL           string `json:"returnUrl,omitempty"`
+	ReturnBody          string `json:"returnBody,omitempty"`
+	PersistentOps       string `json:"persistentOps,omitempty"`
+	PersistentNotifyURL string `json:"persistentNotifyUrl,omitempty"`
+	PersistentPipeline  string `json:"persistentPipeline,omitempty"`
+	EndUser             string `json:"endUser,omitempty"`
+	DeleteAfterDays     int    `json:"deleteAfterDays,omitempty"`
+	FileType            int    `json:"fileType,omitempty"`
+}
+
+// UploadToken 方法用来进行上传凭证的生成
+func (p *PutPolicy) UploadToken(mac *qbox.Mac) (token string) {
+	if p.Expires == 0 {
+		p.Expires = 3600 // 1 hour
+	}
+	p.Expires += uint32(time.Now().Unix())
+
+	putPolicyJSON, _ := json.Marshal(p)
+	token = mac.SignWithData(putPolicyJSON)
+	return
+}
+
+func getAkBucketFromUploadToken(token string) (ak, bucket string, err error) {
+	items := strings.Split(token, ":")
+	if len(items) != 3 {
+		err = errors.New("invalid upload token, format error")
+		return
+	}
+
+	ak = items[0]
+	policyBytes, dErr := base64.URLEncoding.DecodeString(items[2])
+	if dErr != nil {
+		err = errors.New("invalid upload token, invalid put policy")
+		return
+	}
+
+	putPolicy := PutPolicy{}
+	uErr := json.Unmarshal(policyBytes, &putPolicy)
+	if uErr != nil {
+		err = errors.New("invalid upload token, invalid put policy")
+		return
+	}
+
+	bucket = strings.Split(putPolicy.Scope, ":")[0]
+	return
+}