feat(mqe): send http requests

pkg/tsdb/mqe/mqe.go

@@ -3,20 +3,28 @@ package mqe
 import (
 	"context"
 	"net/http"
+	"net/url"
+	"path"
+	"strings"
 
+	"golang.org/x/net/context/ctxhttp"
+
+	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/log"
 	"github.com/grafana/grafana/pkg/tsdb"
 )
 
 type MQEExecutor struct {
 	*tsdb.DataSourceInfo
-	QueryParser *MQEQueryParser
+	QueryParser    *MQEQueryParser
+	ResponseParser *MQEResponseParser
 }
 
 func NewMQEExecutor(dsInfo *tsdb.DataSourceInfo) tsdb.Executor {
 	return &MQEExecutor{
 		DataSourceInfo: dsInfo,
 		QueryParser:    &MQEQueryParser{},
+		ResponseParser: &MQEResponseParser{},
 	}
 }
 
@@ -61,12 +69,54 @@ func (e *MQEExecutor) Execute(ctx context.Context, queries tsdb.QuerySlice, cont
 		rawQueries = append(rawQueries, queries...)
 	}
 
+	asdf := &tsdb.QueryResult{}
 	for _, v := range rawQueries {
 		glog.Info("Mqe executor", "query", v)
-		//create request from v
-		//send request
-		//parse request
+
+		req, err := e.createRequest(v)
+
+		resp, err := ctxhttp.Do(ctx, HttpClient, req)
+		if err != nil {
+			return result.WithError(err)
+		}
+
+		series, err := e.ResponseParser.Parse(resp)
+		if err != nil {
+			return result.WithError(err)
+		}
+
+		asdf.Series = append(asdf.Series, series.Series...)
 	}
 
+	result.QueryResults["A"] = asdf
+
 	return result
 }
+
+func (e *MQEExecutor) createRequest(query string) (*http.Request, error) {
+	u, _ := url.Parse(e.Url)
+	u.Path = path.Join(u.Path, "query")
+
+	payload := simplejson.New()
+	payload.Set("query", query)
+
+	jsonPayload, err := payload.MarshalJSON()
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequest(http.MethodPost, u.String(), strings.NewReader(string(jsonPayload)))
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("User-Agent", "Grafana")
+	req.Header.Set("Content-Type", "application/json")
+
+	if e.BasicAuth {
+		req.SetBasicAuth(e.BasicAuthUser, e.BasicAuthPassword)
+	}
+
+	glog.Debug("Mqe request", "url", req.URL.String())
+	return req, nil
+}