feature: added the ngx.configure module and APIs.

Author: thibaultcha

.travis.yml

@@ -61,7 +61,7 @@ install:
   - git clone https://github.com/openresty/openresty.git ../openresty
   - git clone https://github.com/openresty/openresty-devel-utils.git
   - git clone https://github.com/simpl/ngx_devel_kit.git ../ndk-nginx-module
-  - git clone https://github.com/openresty/lua-nginx-module.git ../lua-nginx-module
+  - git clone -b feat/configure-by-lua https://github.com/thibaultcha/lua-nginx-module.git ../lua-nginx-module
   - git clone https://github.com/openresty/no-pool-nginx.git ../no-pool-nginx
   - git clone https://github.com/openresty/echo-nginx-module.git ../echo-nginx-module
   - git clone https://github.com/openresty/lua-resty-lrucache.git

lib/ngx/configure.lua

@@ -0,0 +1,161 @@
+-- Copyright (C) Yichun Zhang (agentzh)
+--
+-- Author: Thibault Charbonnier (thibaultcha)
+
+
+local base = require "resty.core.base"
+base.allows_subsystem("http", "stream")
+
+
+local ffi = require "ffi"
+local C = ffi.C
+--local FFI_OK = base.FFI_OK
+local FFI_ERROR = base.FFI_ERROR
+local FFI_DECLINED = base.FFI_DECLINED
+local ffi_str = ffi.string
+local get_string_buf = base.get_string_buf
+local get_size_ptr = base.get_size_ptr
+local find = string.find
+local type = type
+
+
+local ERR_BUF_SIZE = 128
+
+
+ffi.cdef [[
+    unsigned int ngx_http_lua_ffi_is_configure_phase();
+
+    int ngx_http_lua_ffi_configure_shared_dict(ngx_str_t *name,
+        ngx_str_t *size, unsigned char *errstr, size_t *errlen);
+
+    void ngx_http_lua_ffi_configure_max_pending_timers(int n_timers);
+
+    void ngx_http_lua_ffi_configure_max_running_timers(int n_timers);
+
+    int ngx_http_lua_ffi_configure_env(const unsigned char *value,
+                                       size_t name_len, size_t len);
+]]
+
+
+local _M = { version = base.version }
+
+
+function _M.is_configure_phase()
+    return C.ngx_http_lua_ffi_is_configure_phase() == 1
+end
+
+
+do
+    local name_str_t = ffi.new("ngx_str_t[1]")
+    local size_str_t = ffi.new("ngx_str_t[1]")
+
+
+    function _M.shared_dict(name, size)
+        if not _M.is_configure_phase() then
+            error("API disabled in the current context", 2)
+        end
+
+        if type(name) ~= "string" then
+            error("name must be a string", 2)
+        end
+
+        if type(size) ~= "string" then
+            error("size must be a string", 2)
+        end
+
+        local name_len = #name
+        if name_len == 0 then
+            error("invalid lua shared dict name", 2)
+        end
+
+        local size_len = #size
+        if size_len == 0 then
+            error("invalid lua shared dict size", 2)
+        end
+
+        local name_t = name_str_t[0]
+        local size_t = size_str_t[0]
+
+        name_t.data = name
+        name_t.len = name_len
+
+        size_t.data = size
+        size_t.len = size_len
+
+        local err = get_string_buf(ERR_BUF_SIZE)
+        local errlen = get_size_ptr()
+        errlen[0] = ERR_BUF_SIZE
+
+        local rc = C.ngx_http_lua_ffi_configure_shared_dict(name_str_t,
+                                                            size_str_t, err,
+                                                            errlen)
+        if rc == FFI_ERROR then
+            error(ffi_str(err, errlen[0]))
+        end
+
+        if rc == FFI_DECLINED then
+            return nil, "exists"
+        end
+
+        -- NGINX_OK/FFI_OK
+
+        return true
+    end
+end
+
+
+function _M.max_pending_timers(n_timers)
+    if not _M.is_configure_phase() then
+        error("API disabled in the current context", 2)
+    end
+
+    if type(n_timers) ~= "number" then
+        error("n_timers must be a number", 2)
+    end
+
+    if n_timers < 0 then
+        error("n_timers must be positive", 2)
+    end
+
+    C.ngx_http_lua_ffi_configure_max_pending_timers(n_timers)
+end
+
+
+function _M.max_running_timers(n_timers)
+    if not _M.is_configure_phase() then
+        error("API disabled in the current context", 2)
+    end
+
+    if type(n_timers) ~= "number" then
+        error("n_timers must be a number", 2)
+    end
+
+    if n_timers < 0 then
+        error("n_timers must be positive", 2)
+    end
+
+    C.ngx_http_lua_ffi_configure_max_running_timers(n_timers)
+end
+
+
+function _M.env(value)
+    if not _M.is_configure_phase() then
+        error("API disabled in the current context", 2)
+    end
+
+    if type(value) ~= "string" then
+        error("value must be a string", 2)
+    end
+
+    local len = #value
+    local idx = find(value, "=")
+
+    local rc = C.ngx_http_lua_ffi_configure_env(value, idx and idx - 1 or len,
+                                                len)
+    if rc == FFI_ERROR then
+        error("no memory")
+    end
+end
+
+
+return _M

lib/resty/core/phase.lua

@@ -1,5 +1,6 @@
 local ffi = require 'ffi'
 local base = require "resty.core.base"
+local ngx_configure = require "ngx.configure"
 
 local C = ffi.C
 local FFI_ERROR = base.FFI_ERROR
@@ -33,8 +34,13 @@ local context_names = {
 function ngx.get_phase()
     local r = getfenv(0).__ngx_req
 
-    -- if we have no request object, assume we are called from the "init" phase
+    -- if we have no request object, assume we are called from the "init"
+    -- or "configure" phase
     if not r then
+        if ngx_configure.is_configure_phase() then
+            return "configure"
+        end
+
         return "init"
     end
 

lib/resty/core/shdict.lua

@@ -3,6 +3,7 @@
 
 local ffi = require 'ffi'
 local base = require "resty.core.base"
+local ngx_configure = require "ngx.configure"
 
 local ffi_new = ffi.new
 local ffi_str = ffi.string
@@ -71,6 +72,10 @@ local errmsg = base.get_errmsg_ptr()
 
 
 local function check_zone(zone)
+    if ngx_configure.is_configure_phase() then
+        error("API disabled in the context of configure_by_lua", 3)
+    end
+
     if not zone or type(zone) ~= "table" then
         return error("bad \"zone\" argument")
     end