Python接口开发实现步骤详解

#!/usr/bin/python3
# encoding:utf-8
import flask,json
# 实例化api，把当前这个python文件当作一个服务，__name__代表当前这个python文件
api = flask.Flask(__name__) 

# \'index\'是接口路径，methods不写，默认get请求     
@api.route(\'/index\',methods=[\'get\']) 
# get方式访问
def index():
  ren = {\'msg\':\'成功访问首页\',\'msg_code\':200}
  #json.dumps 序列化时对中文默认使用的ascii编码.想输出中文需要指定ensure_ascii=False
  return json.dumps(ren,ensure_ascii=False)

#post入参访问方式一：url格式参数
@api.route(\'/article\',methods=[\'post\']) 
def article():
  #url格式参数?id=12589&name=\'lishi\'
  id = flask.request.args.get(\'id\')
  
  if id:
    if id == \'12589\':
      ren = {\'msg\':\'成功访问文章\',\'msg_code\':200}
    else:
      ren = {\'msg\':\'找不到文章\',\'msg_code\':400}
  else:
    ren = {\'msg\':\'请输入文章id参数\',\'msg_code\':-1}
  return json.dumps(ren,ensure_ascii=False)

#post入参访问方式二：from-data（k-v）格式参数
@api.route(\'/login\',methods=[\'post\'])
def login():
  #from-data格式参数
  usrname = flask.request.values.get(\'usrname\')
  pwd = flask.request.values.get(\'pwd\')
  
  if usrname and pwd:
    if usrname ==\'test\' and pwd ==\'123456\':
      ren = {\'msg\':\'登录成功\',\'msg_code\':200}
    else:
      ren = {\'msg\':\'用户名或密码错误\',\'msg_code\':-1}
  else:
    ren = {\'msg\':\'用户名或密码为空\',\'msg_code\':1001}
  return json.dumps(ren,ensure_ascii=False)

#post入参访问方式二：josn格式参数  
@api.route(\'/loginjosn\',methods=[\'post\'])
def loginjosn():
  #from-data格式参数
  usrname = flask.request.json.get(\'usrname\')
  pwd = flask.request.json.get(\'pwd\')
  
  if usrname and pwd:
    if usrname ==\'test\' and pwd ==\'123456\':
      ren = {\'msg\':\'登录成功\',\'msg_code\':200}
    else:
      ren = {\'msg\':\'用户名或密码错误\',\'msg_code\':-1}
  else:
    ren = {\'msg\':\'用户名或密码为空\',\'msg_code\':1001}
  return json.dumps(ren,ensure_ascii=False)

if __name__ == \'__main__\':
  api.run(port=8888,debug=True,host=\'127.0.0.1\') # 启动服务
  # debug=True,改了代码后，不用重启，它会自动重启
  # \'host=\'127.0.0.1\'别IP访问地址