apisix/lua/apisix.lua

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2019-04-10 11:08:25 +08:00
-- Copyright (C) Yuansheng Wang
local require = require
local core = require("apisix.core")
local plugin = require("apisix.plugin")
local service_fetch = require("apisix.http.service").get
local admin_init = require("apisix.admin.init")
local get_var = require("resty.ngxvar").fetch
local router = require("apisix.router")
local ipmatcher = require("resty.ipmatcher")
local ngx = ngx
local get_method = ngx.req.get_method
local ngx_exit = ngx.exit
local ngx_ERROR = ngx.ERROR
local math = math
local error = error
local ipairs = ipairs
local pairs = pairs
local tostring = tostring
local load_balancer
local parsed_domain = core.lrucache.new({
ttl = 300, count = 512
})
local _M = {version = 0.3}
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function _M.http_init()
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require("resty.core")
if require("ffi").os == "Linux" then
require("ngx.re").opt("jit_stack_size", 200 * 1024)
end
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require("jit.opt").start("minstitch=2", "maxtrace=4000",
"maxrecord=8000", "sizemcode=64",
"maxmcode=4000", "maxirconst=1000")
--
local seed, err = core.utils.get_seed_from_urandom()
if not seed then
core.log.warn('failed to get seed from urandom: ', err)
seed = ngx.now() * 1000 + ngx.worker.pid()
end
math.randomseed(seed)
core.id.init()
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end
function _M.http_init_worker()
local we = require("resty.worker.events")
local ok, err = we.configure({shm = "worker-events", interval = 0.1})
if not ok then
error("failed to init worker event: " .. err)
end
require("apisix.balancer").init_worker()
load_balancer = require("apisix.balancer").run
require("apisix.admin.init").init_worker()
router.http_init_worker()
require("apisix.http.service").init_worker()
plugin.init_worker()
require("apisix.consumer").init_worker()
if core.config == require("apisix.core.config_yaml") then
core.config.init_worker()
end
require("apisix.debug").init_worker()
end
local function run_plugin(phase, plugins, api_ctx)
api_ctx = api_ctx or ngx.ctx.api_ctx
if not api_ctx then
return
end
plugins = plugins or api_ctx.plugins
if not plugins then
return api_ctx
end
if phase == "balancer" then
local balancer_name = api_ctx.balancer_name
local balancer_plugin = api_ctx.balancer_plugin
if balancer_name and balancer_plugin then
local phase_fun = balancer_plugin[phase]
phase_fun(balancer_plugin, api_ctx)
return api_ctx
end
for i = 1, #plugins, 2 do
local phase_fun = plugins[i][phase]
if phase_fun and
(not balancer_name or balancer_name == plugins[i].name) then
phase_fun(plugins[i + 1], api_ctx)
if api_ctx.balancer_name == plugins[i].name then
api_ctx.balancer_plugin = plugins[i]
return api_ctx
end
end
end
return api_ctx
end
if phase ~= "log" then
for i = 1, #plugins, 2 do
local phase_fun = plugins[i][phase]
if phase_fun then
local code, body = phase_fun(plugins[i + 1], api_ctx)
if code or body then
core.response.exit(code, body)
end
end
end
return api_ctx
end
for i = 1, #plugins, 2 do
local phase_fun = plugins[i][phase]
if phase_fun then
phase_fun(plugins[i + 1], api_ctx)
end
end
return api_ctx
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end
function _M.http_ssl_phase()
local ngx_ctx = ngx.ctx
local api_ctx = ngx_ctx.api_ctx
if api_ctx == nil then
api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx
end
local ok, err = router.router_ssl.match(api_ctx)
if not ok then
if err then
core.log.error("failed to fetch ssl config: ", err)
end
return ngx_exit(ngx_ERROR)
end
end
local function parse_domain_in_up(up, ver)
local local_conf = core.config.local_conf()
local dns_resolver = local_conf and local_conf.apisix and
local_conf.apisix.dns_resolver
local new_nodes = core.table.new(0, 8)
for addr, weight in pairs(up.value.nodes) do
local host, port = core.utils.parse_addr(addr)
if not ipmatcher.parse_ipv4(host) and
not ipmatcher.parse_ipv6(host) then
local ip_info = core.utils.dns_parse(dns_resolver, host)
core.log.info("parse addr: ", core.json.delay_encode(ip_info),
" resolver: ", core.json.delay_encode(dns_resolver),
" addr: ", addr)
if ip_info and ip_info.address then
new_nodes[ip_info.address .. ":" .. port] = weight
core.log.info("dns resolver domain: ", host, " to ",
ip_info.address)
end
else
new_nodes[addr] = weight
end
end
up.dns_value = core.table.clone(up.value)
up.dns_value.nodes = new_nodes
core.log.info("parse upstream which contain domain: ",
core.json.delay_encode(up))
return up
end
local function parse_domain_in_route(route, ver)
local local_conf = core.config.local_conf()
local dns_resolver = local_conf and local_conf.apisix and
local_conf.apisix.dns_resolver
local new_nodes = core.table.new(0, 8)
for addr, weight in pairs(route.value.upstream.nodes) do
local host, port = core.utils.parse_addr(addr)
if not ipmatcher.parse_ipv4(host) and
not ipmatcher.parse_ipv6(host) then
local ip_info = core.utils.dns_parse(dns_resolver, host)
core.log.info("parse addr: ", core.json.delay_encode(ip_info),
" resolver: ", core.json.delay_encode(dns_resolver),
" addr: ", addr)
if ip_info and ip_info.address then
new_nodes[ip_info.address .. ":" .. port] = weight
core.log.info("dns resolver domain: ", host, " to ",
ip_info.address)
end
else
new_nodes[addr] = weight
end
end
route.dns_value = core.table.deepcopy(route.value)
route.dns_value.upstream.nodes = new_nodes
core.log.info("parse route which contain domain: ",
core.json.delay_encode(route))
return route
end
function _M.http_access_phase()
local ngx_ctx = ngx.ctx
local api_ctx = ngx_ctx.api_ctx
if not api_ctx then
api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx
end
core.ctx.set_vars_meta(api_ctx)
-- load and run global rule
if router.global_rules and router.global_rules.values
and #router.global_rules.values > 0 then
local plugins = core.tablepool.fetch("plugins", 32, 0)
for _, global_rule in ipairs(router.global_rules.values) do
api_ctx.conf_type = "global_rule"
api_ctx.conf_version = global_rule.modifiedIndex
api_ctx.conf_id = global_rule.value.id
core.table.clear(plugins)
api_ctx.plugins = plugin.filter(global_rule, plugins)
run_plugin("rewrite", plugins, api_ctx)
run_plugin("access", plugins, api_ctx)
end
core.tablepool.release("plugins", plugins)
api_ctx.plugins = nil
api_ctx.conf_type = nil
api_ctx.conf_version = nil
api_ctx.conf_id = nil
end
router.router_http.match(api_ctx)
core.log.info("matched route: ",
core.json.delay_encode(api_ctx.matched_route, true))
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local route = api_ctx.matched_route
if not route then
return core.response.exit(404)
end
if route.value.service_protocol == "grpc" then
return ngx.exec("@grpc_pass")
end
if route.value.service_id then
local service = service_fetch(route.value.service_id)
if not service then
core.log.error("failed to fetch service configuration by ",
"id: ", route.value.service_id)
return core.response.exit(404)
end
local changed
route, changed = plugin.merge_service_route(service, route)
api_ctx.matched_route = route
if changed then
api_ctx.conf_type = "route&service"
api_ctx.conf_version = route.modifiedIndex .. "&"
.. service.modifiedIndex
api_ctx.conf_id = route.value.id .. "&"
.. service.value.id
else
api_ctx.conf_type = "service"
api_ctx.conf_version = service.modifiedIndex
api_ctx.conf_id = service.value.id
end
else
api_ctx.conf_type = "route"
api_ctx.conf_version = route.modifiedIndex
api_ctx.conf_id = route.value.id
end
local up_id = route.value.upstream_id
if up_id then
local upstreams_etcd = core.config.fetch_created_obj("/upstreams")
if upstreams_etcd then
local upstream = upstreams_etcd:get(tostring(up_id))
if upstream.has_domain then
parsed_domain(upstream, api_ctx.conf_version,
parse_domain_in_up, upstream)
end
end
elseif route.has_domain then
route = parsed_domain(route, api_ctx.conf_version,
parse_domain_in_route, route)
end
local plugins = core.tablepool.fetch("plugins", 32, 0)
api_ctx.plugins = plugin.filter(route, plugins)
run_plugin("rewrite", plugins, api_ctx)
if api_ctx.consumer then
local changed
route, changed = plugin.merge_consumer_route(route, api_ctx.consumer)
if changed then
core.table.clear(api_ctx.plugins)
api_ctx.plugins = plugin.filter(route, api_ctx.plugins)
end
end
run_plugin("access", plugins, api_ctx)
end
function _M.grpc_access_phase()
local ngx_ctx = ngx.ctx
local api_ctx = ngx_ctx.api_ctx
if not api_ctx then
api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx
end
core.ctx.set_vars_meta(api_ctx)
router.router_http.match(api_ctx)
core.log.info("route: ",
core.json.delay_encode(api_ctx.matched_route, true))
local route = api_ctx.matched_route
if not route then
return core.response.exit(404)
end
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if route.value.service_id then
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-- core.log.info("matched route: ", core.json.delay_encode(route.value))
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local service = service_fetch(route.value.service_id)
if not service then
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core.log.error("failed to fetch service configuration by ",
"id: ", route.value.service_id)
return core.response.exit(404)
end
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local changed
route, changed = plugin.merge_service_route(service, route)
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api_ctx.matched_route = route
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if changed then
api_ctx.conf_type = "route&service"
api_ctx.conf_version = route.modifiedIndex .. "&"
.. service.modifiedIndex
api_ctx.conf_id = route.value.id .. "&"
.. service.value.id
else
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api_ctx.conf_type = "service"
api_ctx.conf_version = service.modifiedIndex
api_ctx.conf_id = service.value.id
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end
else
api_ctx.conf_type = "route"
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api_ctx.conf_version = route.modifiedIndex
api_ctx.conf_id = route.value.id
end
local plugins = core.tablepool.fetch("plugins", 32, 0)
api_ctx.plugins = plugin.filter(route, plugins)
run_plugin("rewrite", plugins, api_ctx)
run_plugin("access", plugins, api_ctx)
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end
function _M.http_header_filter_phase()
run_plugin("header_filter")
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end
function _M.http_body_filter_phase()
run_plugin("body_filter")
end
function _M.http_log_phase()
local api_ctx = run_plugin("log")
if api_ctx then
if api_ctx.uri_parse_param then
core.tablepool.release("uri_parse_param", api_ctx.uri_parse_param)
end
core.ctx.release_vars(api_ctx)
if api_ctx.plugins then
core.tablepool.release("plugins", api_ctx.plugins)
end
core.tablepool.release("api_ctx", api_ctx)
end
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end
function _M.http_balancer_phase()
local api_ctx = ngx.ctx.api_ctx
if not api_ctx then
core.log.error("invalid api_ctx")
return core.response.exit(500)
end
-- first time
if not api_ctx.balancer_name then
run_plugin("balancer", nil, api_ctx)
if api_ctx.balancer_name then
return
end
end
if api_ctx.balancer_name and api_ctx.balancer_name ~= "default" then
return run_plugin("balancer", nil, api_ctx)
end
api_ctx.balancer_name = "default"
load_balancer(api_ctx.matched_route, api_ctx)
end
do
local router
function _M.http_admin()
if not router then
router = admin_init.get()
end
-- core.log.info("uri: ", get_var("uri"), " method: ", get_method())
local ok = router:dispatch(get_var("uri"), {method = get_method()})
if not ok then
ngx_exit(404)
end
end
end -- do
function _M.stream_init()
core.log.info("enter stream_init")
end
function _M.stream_init_worker()
core.log.info("enter stream_init_worker")
router.stream_init_worker()
plugin.init_worker()
load_balancer = require("apisix.balancer").run
end
function _M.stream_preread_phase()
core.log.info("enter stream_preread_phase")
local ngx_ctx = ngx.ctx
local api_ctx = ngx_ctx.api_ctx
if not api_ctx then
api_ctx = core.tablepool.fetch("api_ctx", 0, 32)
ngx_ctx.api_ctx = api_ctx
end
core.ctx.set_vars_meta(api_ctx)
router.router_stream.match(api_ctx)
core.log.info("matched route: ",
core.json.delay_encode(api_ctx.matched_route, true))
local matched_route = api_ctx.matched_route
if not matched_route then
return ngx_exit(1)
end
local plugins = core.tablepool.fetch("plugins", 32, 0)
api_ctx.plugins = plugin.stream_filter(matched_route, plugins)
-- core.log.info("valid plugins: ", core.json.delay_encode(plugins, true))
run_plugin("preread", plugins, api_ctx)
end
function _M.stream_balancer_phase()
core.log.info("enter stream_balancer_phase")
local api_ctx = ngx.ctx.api_ctx
if not api_ctx then
core.log.error("invalid api_ctx")
return ngx_exit(1)
end
-- first time
if not api_ctx.balancer_name then
run_plugin("balancer", nil, api_ctx)
if api_ctx.balancer_name then
return
end
end
if api_ctx.balancer_name and api_ctx.balancer_name ~= "default" then
return run_plugin("balancer", nil, api_ctx)
end
api_ctx.balancer_name = "default"
load_balancer(api_ctx.matched_route, api_ctx)
end
function _M.stream_log_phase()
core.log.info("enter stream_log_phase")
-- core.ctx.release_vars(api_ctx)
run_plugin("log")
end
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return _M