01.NETCORE2.2使用OCELOT简单使用

　　目前参考两篇文章，已实现基本的ocelot的网关功能。

　　按照第一篇的操作，ocelot的网关宿主为cmd，因为本想用webapi项目引用ocelot实现网关功能，配置文件有点出入。

　　后来搜索查到第二篇。简单修改下配置，configuration.json 如下

{
"reroutes": [
{
"downstreampathtemplate": "/api/customers",
"downstreamscheme": "http",
"downstreamhostandports": [
{
"host": "localhost",
"port": 9001
}
],
"upstreampathtemplate": "/customers",
"upstreamhttpmethod": [ "get" ]
},
{
"downstreampathtemplate": "/api/customers/{id}",
"downstreamscheme": "http",
"downstreamhostandports": [
{
"host": "localhost",
"port": 9001
}
],
"upstreampathtemplate": "/customers/{id}",
"upstreamhttpmethod": [ "get" ]
},
{
"downstreampathtemplate": "/api/products",
"downstreamscheme": "http",
"downstreamhostandports": [
{
"host": "localhost",
"port": 9002
}
],
"upstreampathtemplate": "/api/products",
"upstreamhttpmethod": [ "get" ]
}
]
}

　　修改三个项目的启动宿主为iisexpress、端口等，并在解决方案中设置为多项目启动。

　　vs按f5启动，可以看到同时启动三个项目