Development guide | nginx documentation
For general purposes, nginx code uses two integer types, ngx_int_t and ngx_uint_t, which are typedefs for intptr_t and uintptr_t respectively. Most functions in nginx return the following codes: NGX_OK — Operation succeeded. NGX_ERROR — Operation failed. NGX_AGAIN — Operation incomplete; call the function again. NGX_DECLINED — Operation rejected, for example, because it is disabled in the configur
Module ngx_http_upstream_module
Defines a group of servers. Servers can listen on different ports. In addition, servers listening on TCP and UNIX-domain sockets can be mixed. Example: upstream backend { server backend1.example.com weight=5; server 127.0.0.1:8080 max_fails=3 fail_timeout=30s; server unix:/tmp/backend3; server backup1.example.com backup; } By default, requests are distributed between the servers using a weighted r
Module ngx_stream_ssl_preread_module
The ngx_stream_ssl_preread_module module (1.11.5) allows extracting information from the ClientHello message without terminating SSL/TLS, for example, the server name requested through SNI or protocols advertised in ALPN. This module is not built by default, it should be enabled with the --with-stream_ssl_preread_module configuration parameter. Selecting an upstream based on server name: map $ssl_
NginxHttpCoreModule
Enables or disables the use of asynchronous file I/O (AIO) on FreeBSD and Linux: location /video/ { aio on; output_buffers 1 64k; } On FreeBSD, AIO can be used starting from FreeBSD 4.3. Prior to FreeBSD 11.0, AIO can either be linked statically into a kernel: options VFS_AIO or loaded dynamically as a kernel loadable module: kldload aio On Linux, AIO can be used starting from kernel version 2.6.2
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