使用Go调用第三方API的方法详解

package main

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

const apiKey = "your_api_key"
const city = "Beijing"

type WeatherResponse struct {
	Name string `json:"name"`
	Main struct {
		Temp     float64 `json:"temp"`
		Humidity int     `json:"humidity"`
	} `json:"main"`
	Weather []struct {
		Description string `json:"description"`
	} `json:"weather"`
}

func main() {
	url := fmt.Sprintf("https://api.openweathermap.org/data/2.5/weather?q=%s&appid=%s&units=metric", city, apiKey)

	resp, err := http.Get(url)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	body, _ := ioutil.ReadAll(resp.Body)

	var weather WeatherResponse
	if err := json.Unmarshal(body, &weather); err != nil {
		panic(err)
	}

	fmt.Printf("城市：%s\n温度：%.2f℃\n湿度：%d%%\n天气：%s\n",
		weather.Name,
		weather.Main.Temp,
		weather.Main.Humidity,
		weather.Weather[0].Description)
}

城市：Beijing
温度：26.34℃
湿度：56%
天气：clear sky

package main

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

const appID = "your_app_id"
const appKey = "your_secret_key"

type TranslateResponse struct {
	From string `json:"from"`
	To   string `json:"to"`
	TransResult []struct {
		Src string `json:"src"`
		Dst string `json:"dst"`
	} `json:"trans_result"`
}

func makeSign(query string, salt string) string {
	signStr := appID + query + salt + appKey
	hash := md5.Sum([]byte(signStr))
	return hex.EncodeToString(hash[:])
}

func main() {
	query := "Hello, world!"
	salt := fmt.Sprintf("%d", time.Now().Unix())
	sign := makeSign(query, salt)

	params := url.Values{}
	params.Set("q", query)
	params.Set("from", "en")
	params.Set("to", "zh")
	params.Set("appid", appID)
	params.Set("salt", salt)
	params.Set("sign", sign)

	resp, err := http.Post("https://fanyi-api.baidu.com/api/trans/vip/translate",
		"application/x-www-form-urlencoded",
		strings.NewReader(params.Encode()))
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	body, _ := ioutil.ReadAll(resp.Body)

	var result TranslateResponse
	if err := json.Unmarshal(body, &result); err != nil {
		panic(err)
	}

	fmt.Printf("翻译结果：%s -> %s\n", result.TransResult[0].Src, result.TransResult[0].Dst)
}

翻译结果：Hello, world! -> 你好，世界！