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@alicloud/fetcher-interceptor-cache-local

v1.4.9

Published

@alicloud/fetcher 请求拦截 - 缓存

Downloads

67

Readme

@alicloud/fetcher-interceptor-cache-local

@alicloud/fetcher 的本地缓存拦截器

发送请求的时候判断时候已存在缓存数据,如果存在则直接返回;如果存在正在发送的相同请求,也直接返回一个 promise(会被正在发送的请求 resolve 或 reject)。

它主要是请求拦截器,但也会拦截响应(为了获取数据),所以顺序上需要放在对响应数据提取的拦截器之后。

新增 config

interface ICacheLocalOptions {
  /**
   * 默认用 FetcherConfig._id,也可以自己指定(不推荐自己指定)
   */
  key?: string;
  /**
   * 本地缓存的生存时间(单位 ms),一旦超过会重新请求,一般建议不小于 10000,即 10s
   * 如果 ttl > 0,但已有的缓存是无生存时间的,则一定会请求
   */
  ttl?: number;
  /**
   * 如果已经有本地缓存,且未失效,指定此参数将重置缓存且重新请求
   * 注意:连续调用此类接口没有意义,跟不设 cacheLocal 一样,建议在修改数据后重新获取数据时
   */
  overwrite?: boolean;
}

interface IFetcherConfigExtra {
  /**
   * 是否做本地缓存,必须手动指定
   */
  cacheLocal?: null | boolean | ICacheLocalOptions;
  /**
   * 通常执行了某数据的「写」操作后(增、删、改)需要对其已有的本地缓存进行清理,可以在这些写操作中使用此参数,会
   * 在接口执行成功后,将缓存中 key 值带有 cacheLocalRemove 指定串的进行移除
   * 
   * 注意可能会误伤友军(不会造成问题),所以,尽可能使用常量或者 URL 本身(因为默认的 key 中是带 URL 的)
   */
  cacheLocalRemove?: string;
}