英文:
Why can't i use ngx.socket.tcp() in init_by_lua phase?
问题
我需要从Unix套接字（postgresql）中读取API定义，并将其设置为共享字典中的变量。是否有禁止这样做的原因？
local pg = pgmoon.new({socket_type = "nginx",host = table.concat({"unix:", config.socket}),database = config.database,user = config.user})assert(pg:connect())local res = assert(pg:query("select info from testy limit 1"))return res
出现以下错误：
nginx: [error] init_by_lua_file error: /usr/local/share/lua/5.1/pgmoon/socket.lua:99: no request foundstack traceback:[C]: in function 'tcp'/usr/local/share/lua/5.1/pgmoon/socket.lua:99: in function 'new'/usr/local/share/lua/5.1/pgmoon/init.lua:1093: in function '__init'/usr/local/share/lua/5.1/pgmoon/init.lua:1101: in function 'new'./lua/store.lua:7: in function 'read'.../peter/Documents/resty-engine/src/lua/lifecycle/init.lua:8: in function 'reloadAPI'.../peter/Documents/resty-engine/src/lua/lifecycle/init.lua:16: in main chunk
如果只插入以下内容，将出现相同的问题：
local socket = ngx.socket.tcp()
英文:
I need to read api definition from unix socket(postgresql) and set it as a variable in shared dict. Is there a reason why this is forbidden?
local pg = pgmoon.new({socket_type = "nginx",host = table.concat({"unix:", config.socket}),database = config.database,user = config.user})assert(pg:connect())local res = assert(pg:query("select info from testy limit 1"))return res
crashes with
nginx: [error] init_by_lua_file error: /usr/local/share/lua/5.1/pgmoon/socket.lua:99: no request foundstack traceback:[C]: in function 'tcp'/usr/local/share/lua/5.1/pgmoon/socket.lua:99: in function 'new'/usr/local/share/lua/5.1/pgmoon/init.lua:1093: in function '__init'/usr/local/share/lua/5.1/pgmoon/init.lua:1101: in function 'new'./lua/store.lua:7: in function 'read'.../peter/Documents/resty-engine/src/lua/lifecycle/init.lua:8: in function 'reloadAPI'.../peter/Documents/resty-engine/src/lua/lifecycle/init.lua:16: in main chunk
same problem will occur if you just insert
local socket = ngx.socket.tcp()
into init_by_lua_block or file
答案1
得分: 3
根据文档，
> 目前，在init_by_lua*和init_worker_by_lua*指令上下文中，cosocket已被禁用。
英文:
According to the documentation,
> The cosockets are currently [...] disabled in the init_by_lua* and init_worker_by_lua* directive contexts
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