Syntax: image_filter_jpeg_quality quality; Default: image_filter_jpeg_quality 75; Context: http, server, location Sets the desired quality of the transformed JPEG images. Acceptable values are in the range from 1 to 100. Lesser values usually imply both lower image quality and less data to transfer. The maximum recommended value is 95. Parameter value can contain variables.

Syntax: image_filter_sharpen percent; Default: image_filter_sharpen 0; Context: http, server, location Increases sharpness of the final image. The sharpness percentage can exceed 100. The zero value disables sharpening. Parameter value can contain variables.

Syntax: proxy_ssl_server_name on | off; Default: proxy_ssl_server_name off; Context: stream, server Enables or disables passing of the server name through TLS Server Name Indication extension (SNI, RFC 6066) when establishing a connection with the proxied server.

Syntax: scgi_temp_file_write_size size; Default: scgi_temp_file_write_size 8k|16k; Context: http, server, location Limits the size of data written to a temporary file at a time, when buffering of responses from the SCGI server to temporary files is enabled. By default, size is limited by two buffers set by the scgi_buffer_size and scgi_buffers directives. The maximum size of a temporary file is set by the scgi_max_temp_file_size directive.

Syntax: xslt_types mime-type ...; Default: xslt_types text/xml; Context: http, server, location Enables transformations in responses with the specified MIME types in addition to “text/xml”. The special value “*” matches any MIME type (0.8.29). If the transformation result is an HTML response, its MIME type is changed to “text/html”.

Syntax: root path; Default: root html; Context: http, server, location, if in location Sets the root directory for requests. For example, with the following configuration location /i/ { root /data/w3; } The /data/w3/i/top.gif file will be sent in response to the “/i/top.gif” request. The path value can contain variables, except $document_root and $realpath_root. A path to the file is constructed by merely adding a URI to the value of the root directive. If a URI has to

Syntax: mp4_max_buffer_size size; Default: mp4_max_buffer_size 10M; Context: http, server, location During metadata processing, a larger buffer may become necessary. Its size cannot exceed the specified size, or else nginx will return the 500 (Internal Server Error) server error, and log the following message: "/some/movie/file.mp4" mp4 moov atom is too large: 12583268, you may want to increase mp4_max_buffer_size

Syntax: split_clients string $variable { ... } Default: — Context: http Creates a variable for A/B testing, for example: split_clients "${remote_addr}AAA" $variant { 0.5% .one; 2.0% .two; * ""; } The value of the original string is hashed using MurmurHash2. In the example given, hash values from 0 to 21474835 (0.5%) correspond to the value ".one" of the $variant variable, hash val

Syntax: ssl_verify_client on | off | optional | optional_no_ca; Default: ssl_verify_client off; Context: stream, server This directive appeared in version 1.11.8. Enables verification of client certificates. The verification result is stored in the $ssl_client_verify variable. If an error has occurred during the client certificate verification or a client has not presented the required certificate, the connection is closed. The optional parameter requests the client cer

Syntax: server_tokens on | off | string; Default: server_tokens on; Context: http, server, location Enables or disables emitting nginx version in error messages and in the “Server” response header field. Additionally, as part of our commercial subscription, starting from version 1.9.13 the signature in error messages and the “Server” response header field value can be set explicitly using the string with variables. An empty string disables the emission of the “Server