ngx.encode_base64 ----------------- **语法:** *newstr = ngx.encode_base64(str, no_padding?)* **环境:** *set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.** 通过 `base64` 对 `str` 字符串编码。 自 `0.9.16` 版本后，引入了一个布尔值参数 `no_padding` 用来控制是否需要编码数据填充 `等号` 字符串（默认为 `false`，代表需要填充）。 它表明调用者可以在 `base64` 流数据结尾添加填充数据。<!-- 不知道怎么翻译好 hambut --> > English source: **syntax:** *newstr = ngx.encode_base64(str, no_padding?)* **context:** *set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.** Encodes `str` to a base64 digest. Since the `0.9.16` release, an optional boolean-typed `no_padding` argument can be specified to control whether the base64 padding should be appended to the resulting digest (default to `false`, i.e., with padding enabled). This enables streaming base64 digest calculation by (data chunks) though it would be the caller's responsibility to append an appropriate padding at the end of data stream. [Back to TOC](#nginx-api-for-lua)