COTOHA API で構文解析 (Golang)

COTOHA API Portal の使用例です。

フォルダー構造

$ tree -a
.
├── .env
├── get_config.go
├── get_token.go
└── parsing.go

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

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

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

    data := make (map[string]interface{})
    data["sentence"] = sentence
    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/parse"
    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")

    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"

    parse_proc(config,sentence)

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

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

get_config.go

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

import (
    "fmt"
    "os"
    "github.com/joho/godotenv"
)

// ---------------------------------------------------------------
func get_config_proc () map[string]interface{} {
    err := godotenv.Load()
    if err != nil {
        fmt.Println("Error loading .env file")
        }

    config := make (map[string]interface{})
    config["grantType"] = "client_credentials"
    config["clientId"] = os.Getenv("CLIENT_ID")
    config["clientSecret"] = os.Getenv("CLIENT_SECRET")
    config["url_base"] = os.Getenv("DEVELOPER_API_BASE_URL")
    config["url_target"] = os.Getenv("ACCESS_TOKEN_PUBLISH_URL")

    return (config)
}

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

get_token.go

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

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

// ---------------------------------------------------------------
func get_token_proc (config map[string]interface{}) string {
    access_token := ""
    str_json, _ := json.Marshal(config)

    url_target := config["url_target"].(string)
    response, error := http.Post(url_target,"application/json",
        strings.NewReader(string(str_json)))
    if error != nil {
        fmt.Println("Request error:", error)
    }

    bb, err := ioutil.ReadAll(response.Body)
    if err == nil {
//      fmt.Println(string(bb))

        var unit_aa map[string]interface{}
        json.Unmarshal ([]byte(string(bb)), &unit_aa)
        access_token = unit_aa["access_token"].(string)
        }

    return (access_token)
}
// ---------------------------------------------------------------

実行コマンド

go run parsing.go get_config.go get_token.go

次のJSONファイルが作成されます。

out01.json

{
  "result" : [ {
    "chunk_info" : {
      "id" : 0,
      "head" : 1,
      "dep" : "D",
      "chunk_head" : 1,
      "chunk_func" : 2,
      "links" : [ ]
    },
    "tokens" : [ {
      "id" : 0,
      "form" : "特急",
      "kana" : "トッキュウ",
      "lemma" : "特急",
      "pos" : "名詞",
      "features" : [ "形容" ],
      "attributes" : { }
    }, {
      "id" : 1,
      "form" : "は",
      "kana" : "ハ",
      "lemma" : "はく",
      "pos" : "動詞語幹",
      "features" : [ "K" ],
      "dependency_labels" : [ {
        "token_id" : 0,
        "label" : "nmod"
      }, {
        "token_id" : 2,
        "label" : "aux"
      } ],
      "attributes" : { }
    }, {
      "id" : 2,
      "form" : "く",
      "kana" : "ク",
      "lemma" : "く",
      "pos" : "動詞接尾辞",
      "features" : [ "連体" ],
      "attributes" : { }
    } ]
  }, {
    "chunk_info" : {
      "id" : 1,
      "head" : -1,
      "dep" : "O",
      "chunk_head" : 0,
      "chunk_func" : 0,
      "links" : [ {
        "link" : 0,
        "label" : "adjectivals"
      } ]
    },
    "tokens" : [ {
      "id" : 3,
      "form" : "たか",
      "kana" : "タカ",
      "lemma" : "鷹",
      "pos" : "名詞",
      "features" : [ ],
      "dependency_labels" : [ {
        "token_id" : 1,
        "label" : "amod"
      } ],
      "attributes" : { }
    } ]
  } ],
  "status" : 0,
  "message" : ""
}