COTOHA でキーワードの抽出 (Golang)

$ tree -a
.
├── akai_rousoku.txt
├── .env
├── get_config.go
├── get_token.go
└── key_word.go

// ---------------------------------------------------------------
//
//  key_word.go
//
//                  Feb/25/2020
// ---------------------------------------------------------------
package main

import (
    "fmt"
    "os"
    "encoding/json"
    "net/http"
    "strings"
    "io/ioutil"
)

// ---------------------------------------------------------------
func key_word_proc(config map[string]interface{},doc string) {
    out_filename := "out01.json"
//  fmt.Printf("%s\n",doc)

    data := make (map[string]interface{})
    data["document"] = doc
    data["type"] = "default"
    str_json, _ := json.Marshal(data)
//  fmt.Printf("%s\n",str_json)

    url_base := config["url_base"]
    fmt.Printf("%s\n",url_base)
    url_target := url_base.(string) + "v1/keyword"
    fmt.Printf("%s\n",url_target)

    req, _ := http.NewRequest("POST", url_target, strings.NewReader(string(str_json)))

    req.Header.Set("Content-Type","application/json") 
    req.Header.Set("Authorization", "Bearer " + config["access_token"].(string))

    client := new(http.Client)
    resp, error := client.Do(req)
    if error != nil {
        fmt.Println("*** error *** client.Do ***")
        fmt.Println("Request error:", error)
        }

    bb, err := ioutil.ReadAll(resp.Body)
    if err == nil {
        ioutil.WriteFile (out_filename,bb,0666)

        var unit_aa map[string]interface{}
        json.Unmarshal ([]byte(string(bb)), &unit_aa)
        fmt.Printf("len(unit_aa) = %d\n", len(unit_aa))
        unit_bb := unit_aa["result"]
        fmt.Println(unit_bb)
        }   


}

// ---------------------------------------------------------------
func main() {

    fmt.Fprintf (os.Stderr,"*** 開始 ***\n")

    file_in := os.Args[1]
    fmt.Printf ("%s\n",file_in)
    buff,_ := ioutil.ReadFile (file_in)
    doc := string(buff)

    config := get_config_proc ()

    access_token := get_token_proc (config)

    config["access_token"] = access_token

    fmt.Printf("%s\n",config["access_token"])

//  sentence := "特急はくたかで富山に向かいます。それから、金沢に行って、兼六園に行きます。"

    key_word_proc(config,doc)

    fmt.Fprintf (os.Stderr,"*** 終了 ***\n")
}

// ---------------------------------------------------------------

go run key_word.go get_config.go get_token.go akai_rousoku.txt

{
  "result" : [ {
    "form" : "猿",
    "score" : 135.52966
  }, {
    "form" : "蝋燭",
    "score" : 83.9601
  }, {
    "form" : "花火",
    "score" : 78.08584
  }, {
    "form" : "亀",
    "score" : 43.078
  }, {
    "form" : "火",
    "score" : 42.81965
  } ],
  "status" : 0,
  "message" : ""
}