Golang 開発のヒント: Baidu AI インターフェイスを使用して Web クローラーを実装する

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    url := "http://www.example.com"
    resp, err := http.Get(url)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    fmt.Println(string(body))
}

package main

import (
    "crypto/md5"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
    "strings"
)

const (
    apiKey    = "your_api_key"
    secretKey = "your_secret_key"
)

func main() {
    query := "Hello, World!"

    tokens := []string{
        "appid=your_appid",
        "q=" + query,
    }

    params := strings.Join(tokens, "&")
    sign := sign(params + secretKey)
    url := "https://fanyi-api.baidu.com/api/trans/vip/translate?" + params + "&sign=" + sign

    resp, err := http.Post(url, "application/x-www-form-urlencoded", nil)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    var result struct {
        Error     int    `json:"error"`
        ErrorMsg  string `json:"error_msg"`
        FromLang  string `json:"from"`
        ToLang    string `json:"to"`
        TransText []struct {
            Src string `json:"src"`
            Dst string `json:"dst"`
        } `json:"trans_result"`
    }

    err = json.Unmarshal(body, &result)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    if result.Error != 0 {
        fmt.Println("Error:", result.ErrorMsg)
        return
    }

    fmt.Printf("Translation from %s to %s: %s -> %s
",
        result.FromLang, result.ToLang, query, result.TransText[0].Dst)
}

func sign(s string) string {
    data := []byte(s)
    hash := md5.Sum(data)
    return fmt.Sprintf("%x", hash)
}