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建设网站必备的开发工具,南宁做网站公司,红河州网站建设制作,进一步加强政府网站内容建设openresty ngx_lua常用指令请求中断 ngx.exit：请求中断语法格式：ngx.exit(status) * status > 200：立刻中断请求，返回状态码 * status 0：中断当前执行阶段，继续执行后续阶段环境：rewrite…

openresty ngx_lua常用指令

请求中断

ngx.exit：请求中断

语法格式：ngx.exit(status)
* status >= 200：立刻中断请求，返回状态码
* status == 0：中断当前执行阶段，继续执行后续阶段环境：rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, ngx.timer.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, ssl_client_hello_by_lua*

请求状态码：status可以用数字、也可以是字面量（ngx.HTTP_OK）

   value = ngx.HTTP_CONTINUE (100) (first added in the v0.9.20 release)value = ngx.HTTP_SWITCHING_PROTOCOLS (101) (first added in the v0.9.20 release)value = ngx.HTTP_OK (200)value = ngx.HTTP_CREATED (201)value = ngx.HTTP_ACCEPTED (202) (first added in the v0.9.20 release)value = ngx.HTTP_NO_CONTENT (204) (first added in the v0.9.20 release)value = ngx.HTTP_PARTIAL_CONTENT (206) (first added in the v0.9.20 release)value = ngx.HTTP_SPECIAL_RESPONSE (300)value = ngx.HTTP_MOVED_PERMANENTLY (301)value = ngx.HTTP_MOVED_TEMPORARILY (302)value = ngx.HTTP_SEE_OTHER (303)value = ngx.HTTP_NOT_MODIFIED (304)value = ngx.HTTP_TEMPORARY_REDIRECT (307) (first added in the v0.9.20 release)value = ngx.HTTP_PERMANENT_REDIRECT (308)value = ngx.HTTP_BAD_REQUEST (400)value = ngx.HTTP_UNAUTHORIZED (401)value = ngx.HTTP_PAYMENT_REQUIRED (402) (first added in the v0.9.20 release)value = ngx.HTTP_FORBIDDEN (403)value = ngx.HTTP_NOT_FOUND (404)value = ngx.HTTP_NOT_ALLOWED (405)value = ngx.HTTP_NOT_ACCEPTABLE (406) (first added in the v0.9.20 release)value = ngx.HTTP_REQUEST_TIMEOUT (408) (first added in the v0.9.20 release)value = ngx.HTTP_CONFLICT (409) (first added in the v0.9.20 release)value = ngx.HTTP_GONE (410)value = ngx.HTTP_UPGRADE_REQUIRED (426) (first added in the v0.9.20 release)value = ngx.HTTP_TOO_MANY_REQUESTS (429) (first added in the v0.9.20 release)value = ngx.HTTP_CLOSE (444) (first added in the v0.9.20 release)value = ngx.HTTP_ILLEGAL (451) (first added in the v0.9.20 release)value = ngx.HTTP_INTERNAL_SERVER_ERROR (500)value = ngx.HTTP_NOT_IMPLEMENTED (501)value = ngx.HTTP_METHOD_NOT_IMPLEMENTED (501) (kept for compatibility)value = ngx.HTTP_BAD_GATEWAY (502) (first added in the v0.9.20 release)value = ngx.HTTP_SERVICE_UNAVAILABLE (503)value = ngx.HTTP_GATEWAY_TIMEOUT (504) (first added in the v0.3.1rc38 release)value = ngx.HTTP_VERSION_NOT_SUPPORTED (505) (first added in the v0.9.20 release)value = ngx.HTTP_INSUFFICIENT_STORAGE (507) (first added in the v0.9.20 release)

core constants

ngx.exit accepts ngx.OK, ngx.ERROR, and ngx.DECLINED as input
* ngx.exit只接受ngx.OK, ngx.ERROR, ngx.DECLINED作为输入参数ngx.OK (0)ngx.ERROR (-1)ngx.AGAIN (-2)ngx.DONE (-4)ngx.DECLINED (-5)

示例

# 输出自定义内容ngx.status = ngx.HTTP_GONEngx.say("This is our own content")-- to cause quit the whole request rather than the current phase handlerngx.exit(ngx.HTTP_OK)$ curl -i http://localhost/testHTTP/1.1 410 GoneServer: nginx/1.0.6Date: Thu, 15 Sep 2011 00:51:48 GMTContent-Type: text/plainTransfer-Encoding: chunkedConnection: keep-aliveThis is our own content

断开连接

ngx.eof：告知客户端断开连接

语法格式：ok, err = ngx.eof()
* 告知客户端断开连接，服务端继续执行后续操作
* 如果后续有子请求，子请求会中断
* 设置指令：proxy_ignore_client_abort on;  ==> 子请求继续执行环境：rewrite_by_lua*, access_by_lua*, content_by_lua*

示例

location = /async {keepalive_timeout 0;content_by_lua_block {ngx.say("got the task!")ngx.eof();     --向客户端发出连接中断请求ngx.sleep(3);  --服务端继续执行后续操作ngx.log(ngx.INFO, "执行ngx.eof");}}

请求休眠

ngx.sleep：请求休眠

语法格式：ngx.sleep(seconds)
* second可以是0.001s环境：rewrite_by_lua*, access_by_lua*, content_by_lua*, ngx.timer.*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_client_hello_by_lua*

示例

location /test {content_by_lua_block {ngx.sleep(5);ngx.say("gtlx");}
}

获取时间

日期时间

ngx.today()      ==>  yyyy-MM-dd格式的时间
ngx.time()       ==>  当前时间的unix时间戳
ngx.now()        ==>  当前时间的unix时间戳，精确到毫秒（小数点3位）
ngx.localtime()  ==>  yyyy-MM-dd HH:mm:ss(所在时区的时间)
ngx.utctime()    ==>  yyyy-MM-dd HH:mm:ss(0时区)ngx.cookie_time(unix)   ==> cookie过期时间，返回格式：Thu, 18 Nov 2010 11:27:35 GMT
ngx.http_time(unix)     ==> 返回一个可以做header头部（Expires、Last-Modified）时间的格式，如：Thu, 18 Nov 2010 11:27:35 GMT# 输入ngx.http_time(unix)格式的时间，输出unix
ngx.parse_http_time("Thu, 18 Nov 2010 11:27:35 GMT")ngx.update_time()：强制更新nginx时间，会影响nginx性能，不推荐使用

编解码

编解码

# uri编解码
ngx.escape_uri(uri)     ==>  uri编码成字符串
ngx.unescape_uri(str)   ==>  字符串还原为uri# 参数编解码
ngx.encode_args(table)             ==>  将table类型的数据编码为字符串（uri路径参数）
ngx.decode_args(str, max_args?)    ==>  将uri路径参数解码为table类型数据# md5加密
ngx.md5(str)       ==> 对str进行md5加密，返回16进制字符串
ngx.md5_bin(str)   ==> 对str进行md5加密，返回2进制字符串

防止sql注入

ngx.quote_sql_str：按照mysql的sql格式，将字符串转换为sql语句

语法格式：quoted_value = ngx.quote_sql_str(raw_value)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.*, balancer_by_lua*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_session_store_by_lua*, ssl_client_hello_by_lua*Returns a quoted SQL string literal according to the MySQL quoting rules
* 根据mysql sql语法格式，返回sql语句

判断子请求

ngx.is_subrequest：判断是否是子请求

语法格式：alue = ngx.is_subrequest
* 当前请求是子请求，返回true
* 当前请求是http请求，返回false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*

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