thrift

交互模型：thrift api handler

基本环境：

1.全局下载thrift解析器：

（1）打开homebrew ，cmd中运行：  homebrew

（2）更新homebrew： brew update

（3）下载thrift：brew install thrift

2.copy thriftify中的server/api/thrift文件下文件到自己项目中的同路径下，同时pakage下载@mtfe／thrift

2.将自己所需的idl文件倒入到／idl下

3.更改thrift配置：

（1）server/router下添加

const thrift = require('./api/thrift');router.set(`${rootdir}thrift/:method`, thrift.handler);

引入thrift模块，设定request的路径，method为idl中server文件中的访问目标，引入thrift.handler来处理该路由下的request

（2）修改server/api/thrift/index中的idlPath , testClient中的参数

const idlPath = require.resolve('./idl/TMessageService.thrift');// const idlPath = require.resolve('./idl/test_parse.thrift');const testClient = thriftify(idlPath, {  localAppKey: names.clientId, remoteAppKey: 'com.sankuai.meituan.meishi.merchant.message.remote', serviceName: 'com.sankuai.meituan.meishi.merchant.message.remote.thrift.TMessageService', // serviceName: 'com.sankuai.meituan.meishi.merchant.photo.thrift.service.TPhotoBatchService', timeout: 20000, serviceList: [{    ip: '10.4.239.194', port: 9001, }],});

4.thrift编译命令 

thrift --gen js:node -r -out compiled/ -I idl/ idl/TPhotoBatchService.thrift

其他命令可以thrift help查看

5.在.eslintignore中添加thrift的路径

server/api/thrift/idlserver/api/thrift/compiled

因为编译后为es5代码，eslint不能通过，所以要忽略该路径下文件

6.在组件中使用request的时候，就可以访问`${rootdir}thrift/${method}?${query}来获取数据，其中method为想访问的目标（名字可以自行修改），query为get方法的参数（eg：limit=20&offset=0）

打印结果

//console.log('opts:', opts)

server/server route.src is "/thrift/:method"

opts: { params: { method: 'mmsMessageList' },

           splat: null,

           user: { id: 2086350, login: 'xiaojia05', name: '肖佳', userId: 2086350 },

           ssoid: 'f8833cbd47*94a90b719ea2957e15a7d',

           queryKeyForUserId: 'ssoid' }

//log.info('thrift rpc', opts.params.method, JSON.stringify(params), JSON.stringify(topts))

thrift rpc mmsMessageList {"offset":"0","limit":"30"} {"header":{"globalContext":{"ssoid":"2086350"}},"unified":true}

 

 

代码阅读：

thrift.js:

function thriftify(idl, config)

加载路径下所有文件及依赖

解析

返回

return function client(name, params, opts) {

 const method = parsed.method[name];

 const serviceName = method.serviceName;

 const args = method.args.map(arg => encode(params[arg.name], arg.type));

 const servicePool = thriftPool[serviceName] || thriftPool;

 const service = serviceList[serviceName];

 

 return servicePool.exec.apply(servicePool, [service,

 xtend({ methodName: name }, opts),

 ].concat(args));

};

index.js

const testClient = thriftify(idlPath, {config}); //调用thriftify创建client客户端

const thriftRpc = thriftRpcCreator(testClient); //创建rpc函数

module.exports = {  client: testClient, handler: thriftHandlerCreator(thriftRpc), //创建hanlder函数};

 

其中

 展开原码

3个函数嵌套，thriftHandlerCreator(thriftRpc)   等同于 

thriftHandlerCreator(thriftRpcCreator(thriftify(idlPath, {config})))

／／

thriftHandlerCreator = rpc => client => params => (req, res, opts, cb) => {

  client(opts.params.method, params, topts)

} => ({

  GET: bsso.useAuthRouter((req, res, opts, cb) => {rpc(query)(req, res, opts, cb);}), POST: bsso.useAuthRouter((req, res, opts, cb) => {rpc(body)(req, res, opts, cb);})); }),});