您的位置:首页 > 运维架构 > Nginx

golang JSON webservice - nginx load balance

2018-02-07 16:44 597 查看
func main() {
http.HandleFunc("/api", apiHandler)
http.HandleFunc("/query/main", mainHandler)
http.HandleFunc("/query/show", showHandler)
http.HandleFunc("/", mainHandler)
http.ListenAndServe(":8081", nil)
}


API 和网页 按不同的url处理

用go-curl调用底层service

func callCurl(postData string) (result string, err error) {
easy := curl.EasyInit()
defer easy.Cleanup()
easy.Setopt(curl.OPT_URL, "http://localhost:8540")
easy.Setopt(curl.OPT_POST, true)
easy.Setopt(curl.OPT_VERBOSE, true)
easy.Setopt(curl.OPT_HTTPHEADER, []string{"Content-Type: application/json"})
easy.Setopt(curl.OPT_POSTFIELDSIZE, len(postData))
easy.Setopt(curl.OPT_READFUNCTION, func(ptr []byte, _ interface{}) int {
return copy(ptr, postData)
})
easy.Setopt(curl.OPT_WRITEFUNCTION, func(buf []byte, _ interface{}) bool {
result = string(buf)
return true
})
if err := easy.Perform(); err != nil {
return "", err
}
return result, nil
}


json.Marshal/Unmarshal 把json字符串转 go struct

https://gobyexample.com/json

http.Template 来写 web页面

https://golang.google.cn/doc/articles/wiki/

格式化一下 json到网页:

https://github.com/tidwall/pretty

opt := &pretty.Options{Width: 80, Prefix: "<br>", Indent: "    ", SortKeys: false}
result = string(pretty.PrettyOptions([]byte(result), opt)


防止 html escape

http://blog.xiayf.cn/2013/11/01/unescape-html-in-golang-html_template/

用 template.HTML类 封装。

用nginx做load balance:

First configure /etc/nginx/nginx.conf:

worker_processes  5;
worker_rlimit_nofile 8192;
events {
worker_connections  4096;
}
http {
upstream myapp1 {
server server1:8081;
server server2:8081;
}
server {
listen 8080;
location / {
proxy_pass http://myapp1; }
}
}


Start nginx via `nginx`

Try it in browser via nginx URL: `http://nginx-server:8080`
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: