前言

该篇文章分享如何将Python Web服务融入到Spring Cloud微服务体系中，并调用其服务，Python Web框架用的是Tornado

构建Python web服务

引入py-eureka-client客户端

pip install py_eureka_client

manage.py

#!/usr/bin/env pythonimport tornado.httpserverimport tornado.ioloopimport tornado.optionsimport tornado.webimport py_eureka_client.eureka_client as eureka_clientfrom tornado.options import define, optionsfrom time import sleepdefine("port", default=3333, help="run on the given port", type=int)class IndexHandler(tornado.web.RequestHandler):  def get(self):    username = self.get_argument('username', 'Hello')    self.write(username + ', Administrator User!')      def post(self):    username = self.get_argument('username', 'Hello')    self.write(username + ', Administrator User!')class MainHandler(tornado.web.RequestHandler):  def get(self):    username = self.get_argument('username', 'Hello')    self.write(username + ', Coisini User!')  def post(self):    username = self.get_argument('username', 'Hello')    self.write(username + ', Coisini User!')def main():  tornado.options.parse_command_line()  # 注册eureka服务  eureka_client.init_registry_client(eureka_server="http://localhost:31091/eureka/,http://localhost:8761/eureka/",                    app_name="python-tornado",                    instance_port=3333)  app = tornado.web.Application(handlers=[(r"/test", IndexHandler), (r"/main", MainHandler)])  http_server = tornado.httpserver.HTTPServer(app)  http_server.listen(options.port)  tornado.ioloop.IOLoop.instance().start()if __name__ == '__main__':  main()

大致说下上述代码，向端口为31091的注册中心注册服务名为python-tornado的服务，端口为3333，提供两个请求方式为GET和POST，接口路径为/test和/main的外部调用接口

启动python服务(在此之前要创建一个Eureka服务注册中心)

python manage.py runserver

运行结果

服务调用(Feign) - Feign用于便捷调用HTTP API

congfig类中需添加注解@EnableFeignClients，具体使用请百度

TestController.java

@RestControllerpublic class TestController {  private TestAPIClient testAPIClient;  @Autowired  public TestController(TestAPIClient testAPIClient) {    this.testAPIClient = testAPIClient;  }  @PostMapping("/test")  public String test(@RequestParam String username) throws Exception {    return this.testAPIClient.test(username);  }    @GetMapping("/test")  public String test1() throws Exception {    return this.testAPIClient.test1();  }}

TestAPIClient.java

@FeignClient(name="python-tornado", configuration = FeignConfigure.class)public interface TestAPIClient {  @PostMapping("/test")  String test(@RequestParam("username") String username);    @GetMapping("/test")  String test1();}

FeignConfigure.java

import feign.Logger;import feign.codec.Encoder;import feign.form.spring.SpringFormEncoder;import org.springframework.beans.factory.ObjectFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.autoconfigure.web.HttpMessageConverters;import org.springframework.cloud.netflix.feign.support.SpringEncoder;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class FeignConfigure {  @Bean  Logger.Level feignLoggerLevel() {    return Logger.Level.FULL;  }  @Autowired  private ObjectFactory messageConverters;    @Bean  public Encoder feignFormEncoder() {    return new SpringFormEncoder(new SpringEncoder(messageConverters));  }}

Feign依赖

 org.springframework.cloud  spring-cloud-starter-feign  io.github.openfeign.form  feign-form  3.4.1  io.github.openfeign.form  feign-form-spring  3.4.1

运行结果

在这里，我们用请求工具Postman来测试一下，可以看出，由TestController调用TestAPIClient再调用Python服务，至此，已完成微服务调用Python Web服务