1 files changed, 133 insertions, 0 deletions
diff --git a/script-beta/proto/proto.lua b/script-beta/proto/proto.lua
new file mode 100644
index 00000000..f04653d5
--- /dev/null
+++ b/script-beta/proto/proto.lua
@@ -0,0 +1,133 @@
+local subprocess = require 'bee.subprocess'
+local util       = require 'utility'
+local await      = require 'await'
+local pub        = require 'pub'
+local jsonrpc    = require 'jsonrpc'
+local ErrorCodes = require 'define.ErrorCodes'
+
+local reqCounter = util.counter()
+
+local m = {}
+
+m.ability = {}
+m.waiting = {}
+
+function m.getMethodName(proto)
+    if proto.method:sub(1, 2) == '$/' then
+        return proto.method:sub(3), true
+    else
+        return proto.method, false
+    end
+end
+
+function m.on(method, callback)
+    m.ability[method] = callback
+end
+
+function m.response(id, res)
+    if id == nil then
+        log.error('Response id is nil!', util.dump(res))
+        return
+    end
+    -- res 可能是nil，为了转成json时保留nil，使用 container 容器
+    local data = util.container()
+    data.id     = id
+    data.result = res
+    local buf = jsonrpc.encode(data)
+    log.debug('Response', id, #buf)
+    io.stdout:write(buf)
+end
+
+function m.responseErr(id, code, message)
+    if id == nil then
+        log.error('Response id is nil!', util.dump(message))
+        return
+    end
+    local buf = jsonrpc.encode {
+        id    = id,
+        error = {
+            code    = code,
+            message = message,
+        }
+    }
+    log.debug('ResponseErr', id, #buf)
+    io.stdout:write(buf)
+end
+
+function m.notify(name, params)
+    local buf = jsonrpc.encode {
+        method = name,
+        params = params,
+    }
+    log.debug('Notify', name, #buf)
+    io.stdout:write(buf)
+end
+
+function m.awaitRequest(name, params)
+    local id = reqCounter()
+    local buf = jsonrpc.encode {
+        id     = id,
+        method = name,
+        params = params,
+    }
+    log.debug('Request', name, #buf)
+    io.stdout:write(buf)
+    return await.wait(function (waker)
+        m.waiting[id] = waker
+    end)
+end
+
+function m.doMethod(proto)
+    local method, optional = m.getMethodName(proto)
+    local abil = m.ability[method]
+    if not abil then
+        if not optional then
+            log.warn('Recieved unknown proto: ' .. method)
+        end
+        if proto.id then
+            m.responseErr(proto.id, ErrorCodes.MethodNotFound, method)
+        end
+        return
+    end
+    await.create(function ()
+        local clock = os.clock()
+        local ok, res = xpcall(abil, log.error, proto.params)
+        local passed = os.clock() - clock
+        if passed > 0.2 then
+            log.debug(('Method [%s] takes [%.3f]sec.'):format(method, passed))
+        end
+        if not proto.id then
+            return
+        end
+        if ok then
+            m.response(proto.id, res)
+        else
+            m.responseErr(proto.id, ErrorCodes.InternalError, res)
+        end
+    end)
+end
+
+function m.doResponse(proto)
+    local id = proto.id
+    local waker = m.waiting[id]
+    if not waker then
+        log.warn('Response id not found: ' .. util.dump(proto))
+        return
+    end
+    m.waiting[id] = nil
+    if proto.error then
+        log.warn(('Response error [%d]: %s'):format(proto.error.code, proto.error.message))
+        return
+    end
+    waker(proto.result)
+end
+
+function m.listen()
+    subprocess.filemode(io.stdin,  'b')
+    subprocess.filemode(io.stdout, 'b')
+    io.stdin:setvbuf  'no'
+    io.stdout:setvbuf 'no'
+    pub.task('loadProto')
+end
+
+return m