fnproject hot functions 说明

Posted 2020-10-09 rongfengliang-荣锋亮

1. 简单介绍

 所谓 hot  functions 实际上就是长时间运行的functions ，简单理解类似后台任务

2. fnproject  处理的方式

fnproject 使用 类似 http的处理方式

3. 配置使用

   参考代码

package main

import (

    "bufio"

    "bytes"

    "fmt"

    "io/ioutil"

    "net/http"

    "os"

    "strconv"

)

func main() {

    for {

        res := http.Response{

            Proto:      "HTTP/1.1",

            ProtoMajor: 1,

            ProtoMinor: 1,

            StatusCode: 200,

            Status:     "OK",

        }

        r := bufio.NewReader(os.Stdin)

        req, err := http.ReadRequest(r)

        var buf bytes.Buffer

        if err != nil {

            res.StatusCode = 500

            res.Status = http.StatusText(res.StatusCode)

            fmt.Fprintln(&buf, err)

        } else {

            l, _ := strconv.Atoi(req.Header.Get("Content-Length"))

            p := make([]byte, l)

            r.Read(p)

            fmt.Fprintf(&buf, "Hello %s\n", p)

            for k, vs := range req.Header {

                fmt.Fprintf(&buf, "ENV: %s %#v\n", k, vs)

            }

        }

        res.Body = ioutil.NopCloser(&buf)

        res.ContentLength = int64(buf.Len())

        res.Write(os.Stdout)

    }

}

    func.yaml  配置

format (mandatory) either "default" or "http". If "http", then it is a hot function.

idle_timeout (optional) - idle timeout (in seconds) before function termination, default 30 seconds.

4. 参考资料

https://github.com/fnproject/fn/tree/master/examples/tutorial/hotfunctions

https://github.com/fnproject/fn/blob/master/docs/hot-functions.md