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batch.go
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batch.go
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package top
import (
"bytes"
"context"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
"github.com/bitly/go-simplejson"
)
const (
defaultSeparator = "\r\n-S-\r\n"
)
func (c *Client) doBatch(ctx context.Context, param Parameters, bodyStr string) ([]byte, error) {
rbURL, err := url.Parse(c.opt.apiBatchURL)
if err != nil {
return nil, err
}
rbURL.RawQuery = param.getRequestData()
req, err := http.NewRequestWithContext(ctx, "POST", rbURL.String(), strings.NewReader(bodyStr))
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", "text/plain;charset=UTF-8")
response, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
err = fmt.Errorf("%d:%s", response.StatusCode, response.Status)
return nil, err
}
return ioutil.ReadAll(response.Body)
}
// BatchResult defines the batch result.
type BatchResult struct {
*simplejson.Json
Err error
}
// DoJsonBatch executes the taobao api in batch.
// https://open.taobao.com/doc.htm?docId=104350&docType=1
func (c *Client) DoJsonBatch(ctx context.Context, params ...Parameters) ([]*BatchResult, error) {
p := Parameters{}
p.setCommonParams(c.opt.appKey, c.opt.session)
size := len(params)
var reqBody bytes.Buffer
for i, param := range params {
reqBody.WriteString(param.getRequestData())
if i != size-1 {
reqBody.WriteString(defaultSeparator)
}
}
bodyStr := reqBody.String()
p.sign(c.opt.appSecret, bodyStr)
bodyBytes, err := c.doBatch(ctx, p, bodyStr)
if err != nil {
return nil, err
}
return bytesToResultBatch(bodyBytes, size)
}
func bytesToResultBatch(bytes []byte, reqSize int) ([]*BatchResult, error) {
ss := strings.Split(string(bytes), defaultSeparator)
size := len(ss)
res := make([]*BatchResult, size)
for i, s := range ss {
js, err := simplejson.NewJson([]byte(s))
res[i] = &BatchResult{Json: js, Err: err}
if err != nil {
continue
}
res[i].Err = checkErrorResp(js)
}
if size != reqSize && size == 1 && res[0].Err != nil {
// it's a common error
return nil, res[0].Err
}
return res, nil
}