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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author ruki
-- @file server_session.lua
--
-- imports
import("core.base.pipe")
import("core.base.bytes")
import("core.base.object")
import("core.base.global")
import("core.base.option")
import("core.base.hashset")
import("core.base.scheduler")
import("core.base.bloom_filter")
import("private.service.server_config", {alias = "config"})
import("private.service.message")
-- define module
local server_session = server_session or object()
-- init server session
function server_session:init(server, session_id)
self._ID = session_id
self._SERVER = server
end
-- get server session id
function server_session:id()
return self._ID
end
-- get server
function server_session:server()
return self._SERVER
end
-- open server session
function server_session:open()
if self:is_connected() then
return
end
-- update status
local status = self:status()
status.connected = true
status.session_id = self:id()
self:status_save()
end
-- close server session
function server_session:close()
if not self:is_connected() then
return
end
-- update status
local status = self:status()
status.connected = false
status.session_id = self:id()
self:status_save()
end
-- pull file
function server_session:pull(respmsg)
local body = respmsg:body()
local stream = self:stream()
local cachekey = body.filename
local cachefile = path.join(self:cachedir(), cachekey:sub(1, 2), cachekey)
local cacheinfofile = cachefile .. ".txt"
vprint("pull cachefile(%s) ..", cachekey)
-- send cache file
if os.isfile(cachefile) then
body.exists = true
if os.isfile(cacheinfofile) then
body.extrainfo = io.load(cacheinfofile)
end
if not stream:send_file(cachefile, {compress = os.filesize(cachefile) > 4096}) then
raise("send %s failed!", cachefile)
end
else
body.exists = false
if not stream:send_emptydata() then
raise("send empty data failed!")
end
end
end
-- push file
function server_session:push(respmsg)
local body = respmsg:body()
local stream = self:stream()
local cachekey = body.filename
local cachefile = path.join(self:cachedir(), cachekey:sub(1, 2), cachekey)
local cacheinfofile = cachefile .. ".txt"
vprint("push cachefile(%s) ..", cachekey)
if not stream:recv_file(cachefile) then
raise("recv %s failed!", cachefile)
end
if body.extrainfo then
io.save(cacheinfofile, body.extrainfo)
end
end
-- get file info
function server_session:fileinfo(respmsg)
local body = respmsg:body()
local stream = self:stream()
local cachekey = body.filename
local cachefile = path.join(self:cachedir(), cachekey:sub(1, 2), cachekey)
body.fileinfo = {filesize = os.filesize(cachefile), exists = os.isfile(cachefile)}
vprint("get cacheinfo(%s)", cachekey)
end
-- get exist info
function server_session:existinfo(respmsg)
local body = respmsg:body()
local stream = self:stream()
local cachedir = self:cachedir()
local filter = bloom_filter.new()
local count = 0
vprint("get existinfo(%s) ..", body.name)
for _, objectfile in ipairs(os.files(path.join(cachedir, "*", "*"))) do
local cachekey = path.basename(objectfile)
if cachekey then
filter:set(cachekey)
count = count + 1
end
end
if count > 0 then
if not stream:send_data(filter:data(), {compress = true}) then
raise("send data failed!")
end
else
if not stream:send_emptydata() then
raise("send empty data failed!")
end
end
body.count = count
vprint("get existinfo(%s): %d ok", body.name, count)
end
-- clean files
function server_session:clean()
vprint("%s: clean files in %s ..", self, self:cachedir())
os.tryrm(self:cachedir())
vprint("%s: clean files ok", self)
end
-- set stream
function server_session:stream_set(stream)
self._STREAM = stream
end
-- get stream
function server_session:stream()
return self._STREAM
end
-- get work directory
function server_session:workdir()
return path.join(self:server():workdir(), "sessions", self:id())
end
-- is connected?
function server_session:is_connected()
return self:status().connected
end
-- get the status
function server_session:status()
local status = self._STATUS
local statusfile = self:statusfile()
if not status then
if os.isfile(statusfile) then
status = io.load(statusfile)
end
status = status or {}
self._STATUS = status
end
return status
end
-- save status
function server_session:status_save()
io.save(self:statusfile(), self:status())
end
-- get status file
function server_session:statusfile()
return path.join(self:workdir(), "status.txt")
end
-- get cache directory
function server_session:cachedir()
return path.join(self:workdir(), "cache")
end
function server_session:__tostring()
return string.format("<session %s>", self:id())
end
function main(server, session_id)
local instance = server_session()
instance:init(server, session_id)
return instance
end
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