Retrofit - OkHttp Authenticator - 如何让其他 api 调用暂停，直到验证器完成执行

Question

我在使用 viewmodel scope 启动的屏幕中有多个 api 调用，就像在 viewmodel 中这样

viewModelScope.launch {
    apiCallOne()
}

viewModelScope.launch {
    apiCallTwo()
}

viewModelScope.launch {
    apiCallThree()
}

我的身份验证者是

override fun authenticate(route: Route?, response: Response): Request? {

    return if (response.retryCount < 1) {
        val token = refreshToken()
        if (token != null)
            response.request.newBuilder().header("Authorization", "Bearer $token")
                .build()
        else
            null
    } else {
        navigateToOnboardingActivity()
        null
    }


}

It is working fine but when 3 api calls are launched parallely, the session is getting refreshed 3 times, how can i make it work like if apicallOne() get 401, it will got to autnenticator and call refresh token api, in this time apicallTwo () 和 apicallThree() 应该在第一个authenticaor 获得成功响应后暂停和恢复。

请注意，我不能像这样在单次启动中调用所有 API

viewModelScope.launch{
apiCallOne()
apiCallTwo()
apiCallThree()
}

Answer 1

你可以像这个例子一样使用：

viewModelScope.launch{
 val result1 = async{apiCallOne()}.await()
 
 if (result1.code() != 401) {
    apiCallTwo()
    apiCallThree()
 }
}

或这个：

viewModelScope.launch{
     val result1 = withContext(Dispatchers.Default) {apiCallOne()}
     
     if (result1.code() != 401) {
        apiCallTwo()
        apiCallThree()
     }
    }