http包发起请求

import (
    "encoding/json"
    "io"
    "log"
    "net/http"
    "fmt"
    model "btcmai/models"
    "time"
)


//普通的get请求
func getCnyHuiLv() {
    resp, err := http.Get("http://apilayer.net/api/live?access_key=315807128332ab246f4e1233bf078d3b&currencies=CNY&source=USD&format=1")
    if err != nil {
        log.Printf("getCnyHuiLv请求错误: %v", err)
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        log.Printf("getCnyHuiLv返回错误: status code %d", resp.StatusCode)

    }

    body, err := io.ReadAll(resp.Body)
    if err != nil {
        log.Printf("getCnyHuiLv汇率错误: %v", err)
    }

    var result Responsecny
    err = json.Unmarshal(body, &result)
    if err != nil {
        log.Printf("getCnyHuiLv汇率错误: %v", err)
    }

    if !result.Success {
        log.Printf("getCnyHuiLv返回非Success结果")
    }
    cnyf := result.Quotes["USDCNY"]
    log.Print("cny兑美元汇率:", cnyf)
}

//附带Header的请求
func getHuilvBtc() {
    url := "https://api.blockchain.com/v3/exchange/tickers/BTC-USD"
    client := &http.Client{}
    req, err := http.NewRequest("GET", url, nil)
    if err != nil {
        log.Printf("btc_blockchain汇率错误: %v", err)
        return
    }
    req.Header.Add("X-API-Token", "5b61758a-405e-48da-bc20-182014c42a41")

    resp, err := client.Do(req)
    if err != nil {
        log.Printf("btc_blockchain汇率错误: %v", err)
        return
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        log.Printf("btc_blockchain返回错误: status code %d", resp.StatusCode)
        return
    }

    body, err := io.ReadAll(resp.Body)
    if err != nil {
        log.Printf("btc_blockchain汇率错误: %v", err)
        return
    }

    var result Responseeth
    err = json.Unmarshal(body, &result)
    if err != nil {
        log.Printf("btc_blockchain汇率错误: %v", err)
        return
    }

    log.Print("eth过去24小时平均:",result.Price24h)

}

//getCnyHuiLv接收参数结构体
type Responsecny struct {
    Success bool             `json:"success"`
    Quotes  map[string]float64 `json:"quotes"`
}

//接收eth参数结构体
type Responseeth struct {
    Price24h float64 `json:"price_24h"`
}

返回内容不使用数据类型，使用通用结构体

res, err := http.Get("https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + config.Config.WxAppid + "&secret=" + config.Config.WxSecret + "&code=" + form.Code +  "&grant_type=authorization_code")
    if err != nil {
        log.Printf("微信登录请求错误: %v", err)
    }
    defer res.Body.Close()

    //取返回主主体
    body, err := io.ReadAll(res.Body)
    if err != nil {
        log.Printf("微信登录取返回主体错误: %v", err)
        c.JSON(500, gin.H{"msg": "遇到错误，请稍后再试或联系客服"})
        return
    }
    log.Printf("微信返回的所有内容: %s,状态码:%d", body, res.StatusCode)

    // 解析响应体为通用的 map
    var result map[string]interface{}
    err = json.Unmarshal(body, &result)
    if err != nil {
        log.Printf("微信登录返回json解码错误: %v", err)
        c.JSON(500, gin.H{"msg": "遇到错误，请稍后再试或联系客服"})
        return
    }
    // 检查是否包含错误码
    if errcode, ok := result["errcode"]; ok {
        log.Printf("微信登录返回错误: errcode=%v, errmsg=%v", errcode, result["errmsg"])
        c.JSON(500, gin.H{"msg": fmt.Sprintf("微信登录返回错误: %v", result["errmsg"])})
        return
    }

    // 返回成功响应
    c.JSON(200, gin.H{
        "access_token":  result["access_token"],
        "expires_in":    result["expires_in"],
        "refresh_token": result["refresh_token"],
        "openid":        result["openid"],
        "scope":         result["scope"],
        "unionid":       result["unionid"],
    })