feature: getLogs response with headers

Author: syaning

Diff for: config.go

@@ -22,7 +22,7 @@ const (
 
 	GetLogsQueryInfo = "X-Log-Query-Info"
 	HasSQLHeader     = "x-log-has-sql"
-	ETLVersion       =  2
+	ETLVersion       = 2
 	ETLType          = "ETL"
 	ETLSinksType     = "AliyunLOG"
 )

Diff for: log_store.go

@@ -582,6 +582,7 @@ func (s *LogStore) getLogs(req *GetLogRequest) (*http.Response, []byte, *GetLogs
 		Count:    count,
 		Contents: contents,
 		HasSQL:   hasSQL,
+		Header:   r.Header,
 	}, nil
 }
 

Diff for: model.go

@@ -2,6 +2,7 @@ package sls
 
 import (
 	"encoding/json"
+	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
@@ -58,6 +59,7 @@ type GetLogsResponse struct {
 	Logs     []map[string]string `json:"logs"`
 	Contents string              `json:"contents"`
 	HasSQL   bool                `json:"hasSQL"`
+	Header   http.Header         `json:"header"`
 }
 
 // GetLogLinesResponse defines response from GetLogLines call