Name

lua-resty-core - New FFI-based Lua API for the ngx_lua module

Table of Contents

• Name
• Status
• Synopsis
• Description
• Prerequisites
• API Implemented
  • resty.core.hash
  • resty.core.base64
  • resty.core.uri
  • resty.core.regex
  • resty.core.exit
  • resty.core.shdict
  • resty.core.var
  • resty.core.ctx
  • resty.core.request
  • resty.core.response
  • resty.core.misc
  • resty.core.time
  • resty.core.worker
  • ngx.semaphore
  • ngx.balancer
  • ngx.ssl
  • ngx.ssl.session
• Caveat
• TODO
• Author
• Copyright and License
• See Also

Status

This library is production ready and under active development.

Synopsis

    # nginx.conf

    http {
        # you do NOT need to configure the following line when you
        # are using the OpenResty bundle 1.4.3.9+.
        lua_package_path "/path/to/lua-resty-core/lib/?.lua;;";

        init_by_lua_block {
            require "resty.core"
            collectgarbage("collect")  -- just to collect any garbage
        }

        ...
    }

Description

This pure Lua library reimplements part of the ngx_lua module's Nginx API for Lua with LuaJIT FFI and installs the new FFI-based Lua API into the ngx.* and ndk.* namespaces used by the ngx_lua module.

In addition, this Lua library implements any significant new Lua APIs of the ngx_lua module as proper Lua modules, like ngx.semaphore and ngx.balancer.

The FFI-based Lua API can work with LuaJIT's JIT compiler. ngx_lua's default API is based on the standard Lua C API, which will never be JIT compiled and the user Lua code is always interpreted (slowly).

This library is shipped with the OpenResty bundle by default. So you do not really need to worry about the dependencies and requirements.

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Prerequisites

• LuaJIT 2.1 (for now, it is the v2.1 git branch in the official luajit-2.0 git repository: http://luajit.org/download.html )
• ngx_lua v0.10.6 or later.
• lua-resty-lrucache

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API Implemented

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resty.core.hash

• ngx.md5
• ngx.md5_bin
• ngx.sha1_bin

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resty.core.base64

• ngx.encode_base64
• ngx.decode_base64

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resty.core.uri

• ngx.escape_uri
• ngx.unescape_uri

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resty.core.regex

• ngx.re.match
• ngx.re.find
• ngx.re.sub
• ngx.re.gsub

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resty.core.exit

• ngx.exit

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resty.core.shdict

• ngx.shared.DICT.get
• ngx.shared.DICT.get_stale
• ngx.shared.DICT.incr
• ngx.shared.DICT.set
• ngx.shared.DICT.safe_set
• ngx.shared.DICT.add
• ngx.shared.DICT.safe_add
• ngx.shared.DICT.replace
• ngx.shared.DICT.delete
• ngx.shared.DICT.flush_all

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resty.core.var

• ngx.var.VARIABLE

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resty.core.ctx

• ngx.ctx

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resty.core.request

• ngx.req.get_headers
• ngx.req.get_uri_args
• ngx.req.start_time
• ngx.req.get_method
• ngx.req.set_method
• ngx.req.set_header (partial: table-typed header values not supported yet)
• ngx.req.clear_header

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resty.core.response

• ngx.header.HEADER

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resty.core.misc

• ngx.status
• ngx.is_subrequest
• ngx.headers_sent

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resty.core.time

• ngx.time
• ngx.now

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resty.core.worker

• ngx.worker.exiting
• ngx.worker.pid
• ngx.worker.id
• ngx.worker.count

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ngx.semaphore

This Lua module implements a semaphore API for efficient "light thread" synchronization, which can work across different requests (but not across nginx worker processes).

See the documentation for this Lua module for more details.

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ngx.balancer

This Lua module implements for defining dynamic upstream balancers in Lua.

See the documentation for this Lua module for more details.

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ngx.ssl

This Lua module provides a Lua API for controlling SSL certificates, private keys, SSL protocol versions, and etc in NGINX downstream SSL handshakes.

See the documentation for this Lua module for more details.

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ngx.ssl.session

This Lua module provides a Lua API for manipulating SSL session data and IDs for NGINX downstream SSL connections.

See the documentation for this Lua module for more details.

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Caveat

If the user Lua code is not JIT compiled, then use of this library may lead to performance drop in interpreted mode. You will only observe speedup when you get a good part of your user Lua code JIT compiled.

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TODO

• Re-implement ngx_lua's cosocket API with FFI.
• Re-implement ngx_lua's ngx.get_phase API function with FFI.
• Re-implement ngx_lua's ngx.eof and ngx.flush API functions with FFI.

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Author

Yichun "agentzh" Zhang (章亦春) agentzh@gmail.com, CloudFlare Inc.

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Copyright and License

This module is licensed under the BSD license.

Copyright (C) 2013-2016, by Yichun "agentzh" Zhang, CloudFlare Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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See Also

• the ngx_lua module: https://github.com/openresty/lua-nginx-module#readme
• LuaJIT FFI: http://luajit.org/ext_ffi.html

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