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本文主要解析一下ngx_http_core_module、ngx_http_limit_conn_module以及ngx_http_limit_req_module中的limit相关配置参数。
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名称 | 默认配置 | 作用域 | 官方说明 | 中文解读 | 模块 |
---|---|---|---|---|---|
limit_rate | limit_rate 0; | http, server, location, if in location | Limits the rate of response transmission to a client. The rate is specified in bytes per second. The zero value disables rate limiting. The limit is set per a request, and so if a client simultaneously opens two connections, the overall rate will be twice as much as the specified limit. | 指定每秒该连接能下载的bytes,主要用来限制个别请求的带宽 | ngx_http_core_module |
limit_rate_after | limit_rate_after 0; | http, server, location, if in location | Sets the initial amount after which the further transmission of a response to a client will be rate limited. | 设置多少bytes过后将启动limit计数,如果小于此值则不限速 | ngx_http_core_module |
limit_except | 没有默认值 | location | Limits allowed HTTP methods inside a location. The method parameter can be one of the following: GET, HEAD, POST, PUT, DELETE, MKCOL, COPY, MOVE, OPTIONS, PROPFIND, PROPPATCH, LOCK, UNLOCK, or PATCH. Allowing the GET method makes the HEAD method also allowed | 设置除了指定的http methods外其他method将被限制,允许GET就自动允许HEAD方法 | ngx_http_core_module |
实例
location /downloads { limit_rate_after 1m; limit_rate 500k; } location / { proxy_pass http://localhost:3000; limit_except GET { deny all; } }