* 判断http客户端是否有权限访问文件的逻辑步骤 * 1、根据http请求头查找cookie，找到进入步骤3 * 2、根据http url参数查找cookie，如果还是未找到cookie则进入步骤5 * 3、cookie标记是否有权限访问文件，如果有权限，直接返回文件 * 4、cookie中记录的url参数是否跟本次url参数一致，如果一致直接返回客户端错误码 * 5、触发kBroadcastHttpAccess事件 * The logical steps to determine whether the http client has permission to access the file * 1. Find the cookie according to the http request header, find it and enter step 3 * 2.
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