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fix:GetAccessTokenContext从cache中获取字符窜为空时,从微信服务器获取 (#721)

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Co-authored-by: markwang <www.wang61@qq.com>
This commit is contained in:
markwang
2023-09-24 10:47:43 +08:00
committed by GitHub
parent ead8a6fadb
commit 49c4cfaf54
1 changed files with 6 additions and 4 deletions
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10
credential/default_access_token.go
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@@ -66,8 +66,9 @@ func (ak *DefaultAccessToken) GetAccessToken() (accessToken string, err error) {
func (ak *DefaultAccessToken) GetAccessTokenContext(ctx context.Context) (accessToken string, err error) {
// 先从cache中取
accessTokenCacheKey := fmt.Sprintf("%s_access_token_%s", ak.cacheKeyPrefix, ak.appID)
if val := ak.cache.Get(accessTokenCacheKey); val != nil {
return val.(string), nil
val := ak.cache.Get(accessTokenCacheKey)
if accessToken = val.(string); accessToken != "" {
return
}
// 加上lock，是为了防止在并发获取token时，cache刚好失效，导致从微信服务器上获取到不同token
@@ -75,8 +76,9 @@ func (ak *DefaultAccessToken) GetAccessTokenContext(ctx context.Context) (access
defer ak.accessTokenLock.Unlock()
// 双检，防止重复从微信服务器获取
if val := ak.cache.Get(accessTokenCacheKey); val != nil {
return val.(string), nil
val = ak.cache.Get(accessTokenCacheKey)
if accessToken = val.(string); accessToken != "" {
return
}
// cache失效，从微信服务器获取