dw-sdk/bid-pre-sale.go

package dw_sdk

import (
	"fmt"
	"net/http"
	"time"

	"github.com/bytedance/sonic"
	"github.com/gofiber/fiber/v3/client"
	"github.com/google/go-querystring/query"
	"github.com/pkg/errors"
	"github.com/valyala/fasthttp/fasthttpproxy"
)

// https://open.dewu.com/#/api/body?apiId=97&id=3&title=%E5%87%BA%E4%BB%B7%E6%9C%8D%E5%8A%A1API

// 预售出价服务客户端
type PreSaleBidClientImpl struct {
	cli     *client.Client
	cfg     PublicConfig
	baseUrl string
}

func NewPreSaleBidClient(cfg Config) BidClient {
	baseUrl := GetUrl(cfg.Public.Env)
	cli := client.New().SetJSONMarshal(func(v any) ([]byte, error) {
		return sonic.Marshal(v)
	}).SetJSONUnmarshal(func(data []byte, v any) error {
		return sonic.Unmarshal(data, v)
	}).AddRequestHook(func(c *client.Client, request *client.Request) error {
		request.SetURL(baseUrl + request.URL())
		return nil
	})

	if cfg.Proxy != nil {
		cli.SetDial(fasthttpproxy.FasthttpHTTPDialer(fmt.Sprintf("%s:%s@%s:%s", cfg.Proxy.User, cfg.Proxy.Pass, cfg.Proxy.Host, cfg.Proxy.Port)))
	}
	return &PreSaleBidClientImpl{
		cli:     cli,
		cfg:     cfg.Public,
		baseUrl: baseUrl,
	}
}

// 获取平台sku最低价【全款预售】
const PreSaleLowestPriceUrl = "/dop/api/v1/bidding/normal_pre_sale/lowest_price"

func (a *PreSaleBidClientImpl) LowestPrice(skuId int) (LowestPriceResponse, error) {
	if skuId == 0 {
		return LowestPriceResponse{}, Err_Params_None
	}
	data := LowestPriceReq{
		PublicParams: PublicParams{
			AppKey:    a.cfg.Key,
			Timestamp: time.Now().UnixMilli(),
		},
		SkuId: skuId,
	}

	Sign(&data, a.cfg.Secret)
	v, _ := query.Values(data)
	s := v.Encode()
	r := a.cli.R()
	defer client.ReleaseRequest(r)

	response, err := r.Get(PreSaleLowestPriceUrl + "?" + s)
	if err != nil {
		return LowestPriceResponse{}, errors.Wrapf(Err_Request_Err, "%s err:%v", PreSaleLowestPriceUrl, err)
	}
	defer client.ReleaseResponse(response)
	var resp PublicResponse[LowestPriceResponse]
	if err = response.JSON(&resp); err != nil {
		return LowestPriceResponse{}, errors.Wrapf(Err_JSON_UNMarshal, "%s err:%v", PreSaleLowestPriceUrl, err)
	}
	if resp.Code != http.StatusOK {
		return LowestPriceResponse{}, errors.Wrapf(Err_Request_Err, "%s resp.msg:%v", PreSaleLowestPriceUrl, resp.Msg)
	}
	return resp.Data, nil
}