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okex.go
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okex.go
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// Package okex okex rest api package
package okex
import (
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"path"
"strconv"
"strings"
"github.com/Akagi201/cryptotrader/model"
"github.com/Akagi201/utilgo/signs"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/spf13/cast"
"github.com/tidwall/gjson"
)
const (
RestHost = "www.okex.com"
ApiVer = "v1"
)
// Client OkEx client
type Client struct {
URL url.URL
HTTPClient *http.Client
AccessKey string
SecretKey string
}
// New creates a new OkEx Client
func New(accessKey string, secretKey string) *Client {
u := url.URL{
Scheme: "https",
Host: RestHost,
Path: "/api/",
}
c := Client{
URL: u,
HTTPClient: &http.Client{},
AccessKey: accessKey,
SecretKey: secretKey,
}
return &c
}
func (c *Client) newRequest(ctx context.Context, method string, spath string, values url.Values, body io.Reader) (*http.Request, error) {
u := c.URL
u.Path = path.Join(c.URL.Path, ApiVer, spath)
u.RawQuery = values.Encode()
log.Debugf("Request URL: %#v", u.String())
req, err := http.NewRequest(method, u.String(), body)
if err != nil {
return nil, err
}
req = req.WithContext(ctx)
return req, nil
}
func (c *Client) SignParams(values *url.Values) error {
values.Set("api_key", c.AccessKey)
payload := values.Encode()
payload = payload + "&secret_key=" + c.SecretKey
//payload, _ = url.QueryUnescape(payload)
sign, err := signs.GetMd5Sign(payload)
if err != nil {
return err
}
values.Add("sign", strings.ToUpper(sign))
return nil
}
func (c *Client) newPrivateRequest(ctx context.Context, method string, spath string, values url.Values, body io.Reader) (*http.Request, error) {
if values == nil {
values = url.Values{}
}
c.SignParams(&values)
//req.URL.RawQuery = values.Encode()
log.Debugf("Encode values: %v", values.Encode())
req, err := c.newRequest(ctx, method, spath, values, body)
if err != nil {
return nil, err
}
return req, nil
}
func (c *Client) getResponse(req *http.Request) ([]byte, error) {
res, err := c.HTTPClient.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != http.StatusOK {
body, _ := ioutil.ReadAll(res.Body)
log.Errorf("body: %v", string(body))
return nil, errors.New(fmt.Sprintf("status code: %d", res.StatusCode))
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, err
}
return body, nil
}
// GetTicker 获取OKEx最新币币行情数据, for Get /api/v1/ticker.do
func (c *Client) GetTicker(ctx context.Context, quote string, base string) (*model.Ticker, error) {
v := url.Values{}
v.Set("symbol", strings.ToLower(quote)+"_"+strings.ToLower(base))
req, err := c.newRequest(ctx, "GET", "ticker.do", v, nil)
if err != nil {
return nil, err
}
body, err := c.getResponse(req)
if err != nil {
return nil, err
}
log.Debugf("Response body: %v", string(body))
buyRes := gjson.GetBytes(body, "ticker.buy").String()
buy, err := strconv.ParseFloat(buyRes, 64)
if err != nil {
return nil, err
}
sellRes := gjson.GetBytes(body, "ticker.sell").String()
sell, err := strconv.ParseFloat(sellRes, 64)
if err != nil {
return nil, err
}
lastRes := gjson.GetBytes(body, "ticker.last").String()
last, err := strconv.ParseFloat(lastRes, 64)
if err != nil {
return nil, err
}
lowRes := gjson.GetBytes(body, "ticker.low").String()
low, err := strconv.ParseFloat(lowRes, 64)
if err != nil {
return nil, err
}
highRes := gjson.GetBytes(body, "ticker.high").String()
high, err := strconv.ParseFloat(highRes, 64)
if err != nil {
return nil, err
}
volRes := gjson.GetBytes(body, "ticker.vol").String()
vol, err := strconv.ParseFloat(volRes, 64)
if err != nil {
return nil, err
}
return &model.Ticker{
Buy: buy,
Sell: sell,
Last: last,
Low: low,
High: high,
Vol: vol,
Raw: string(body),
}, nil
}
// GetDepth 获取币币市场深度, for Get /api/v1/depth
func (c *Client) GetDepth(ctx context.Context, quote string, base string) (*model.OrderBook, error) {
v := url.Values{}
v.Set("symbol", strings.ToLower(quote)+"_"+strings.ToLower(base))
req, err := c.newRequest(ctx, "GET", "depth.do", v, nil)
if err != nil {
return nil, err
}
body, err := c.getResponse(req)
if err != nil {
return nil, err
}
log.Debugf("Response body: %v", string(body))
var order model.MarketOrder
var orderBook model.OrderBook
gjson.GetBytes(body, "bids").ForEach(func(key, value gjson.Result) bool {
order.Price = value.Array()[0].Float()
order.Amount = value.Array()[1].Float()
orderBook.Bids = append(orderBook.Bids, order)
return true // keep iterating
})
gjson.GetBytes(body, "asks").ForEach(func(key, value gjson.Result) bool {
order.Price = value.Array()[0].Float()
order.Amount = value.Array()[1].Float()
orderBook.Asks = append(orderBook.Asks, order)
return true // keep iterating
})
return &orderBook, nil
}
// GetTrades 获取币币交易信息, for GET https://www.okex.com/api/v1/trades.do
func (c *Client) GetTrades(ctx context.Context, quote string, base string) ([]model.Trade, error) {
v := url.Values{}
v.Set("symbol", strings.ToLower(quote)+"_"+strings.ToLower(base))
req, err := c.newRequest(ctx, "GET", "trades.do", v, nil)
if err != nil {
return nil, err
}
body, err := c.getResponse(req)
if err != nil {
return nil, err
}
log.Debugf("Response body: %v", string(body))
var trade model.Trade
var trades []model.Trade
gjson.ParseBytes(body).ForEach(func(key, value gjson.Result) bool {
trade.ID = cast.ToInt64(value.Get("tid").String())
trade.Price = value.Get("price").Float()
trade.Amount = value.Get("amount").Float()
trade.Type = value.Get("type").String()
trade.Time = cast.ToTime(cast.ToInt64(value.Get("date").String()))
trades = append(trades, trade)
return true // keep iterating
})
return trades, nil
}
// GetRecords 获取币币K线数据, for GET https://www.okex.com/api/v1/kline.do
func (c *Client) GetRecords(ctx context.Context, quote string, base string, interval string, since int64, limit int64) ([]model.Record, error) {
v := url.Values{}
v.Set("symbol", strings.ToLower(quote)+"_"+strings.ToLower(base))
v.Set("type", interval)
if since != 0 {
v.Set("startTime", strconv.FormatInt(since, 10))
}
if limit != 0 {
v.Set("limit", strconv.FormatInt(limit, 10))
}
req, err := c.newRequest(ctx, "GET", "kline.do", v, nil)
if err != nil {
return nil, err
}
body, err := c.getResponse(req)
if err != nil {
return nil, err
}
log.Debugf("Response body: %v", string(body))
var record model.Record
var records []model.Record
gjson.ParseBytes(body).ForEach(func(key, value gjson.Result) bool {
record.Open = value.Array()[1].Float()
record.High = value.Array()[2].Float()
record.Low = value.Array()[3].Float()
record.Close = value.Array()[4].Float()
record.Vol = value.Array()[5].Float()
record.Time = cast.ToTime(value.Array()[0].Int() / 1000)
record.Raw = value.String()
records = append(records, record)
return true // keep iterating
})
return records, nil
}
// GetAccount 获取用户信息, for POST https://www.okex.com/api/v1/userinfo.do
func (c *Client) GetAccount(ctx context.Context) ([]model.Balance, error) {
req, err := c.newPrivateRequest(ctx, "POST", "userinfo.do", nil, nil)
if err != nil {
return nil, err
}
body, err := c.getResponse(req)
if err != nil {
return nil, err
}
log.Infof("Response body: %v", string(body))
//var balance model.Balance
//var balances []model.Balance
//gjson.GetBytes(body, "data").ForEach(func(key, value gjson.Result) bool {
// balance.Currency = value.Get("account_type").String()
// balance.Free = cast.ToFloat64(value.Get("active_balance").String())
// balance.Frozen = cast.ToFloat64(value.Get("frozen_balance").String())
//
// balances = append(balances, balance)
// return true // keep iterating
//})
//return balances, nil
return nil, nil
}