mirror of https://github.com/grafana/grafana.git
122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
package api
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import (
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"context"
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"github.com/grafana/grafana/pkg/api/dtos"
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"github.com/grafana/grafana/pkg/bus"
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"github.com/grafana/grafana/pkg/components/simplejson"
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m "github.com/grafana/grafana/pkg/models"
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"github.com/grafana/grafana/pkg/tsdb"
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"github.com/grafana/grafana/pkg/tsdb/testdata"
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"github.com/grafana/grafana/pkg/util"
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)
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// POST /api/tsdb/query
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func (hs *HTTPServer) QueryMetrics(c *m.ReqContext, reqDto dtos.MetricRequest) Response {
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timeRange := tsdb.NewTimeRange(reqDto.From, reqDto.To)
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if len(reqDto.Queries) == 0 {
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return Error(400, "No queries found in query", nil)
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}
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datasourceId, err := reqDto.Queries[0].Get("datasourceId").Int64()
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if err != nil {
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return Error(400, "Query missing datasourceId", nil)
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}
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ds, err := hs.DatasourceCache.GetDatasource(datasourceId, c.SignedInUser, c.SkipCache)
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if err != nil {
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if err == m.ErrDataSourceAccessDenied {
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return Error(403, "Access denied to datasource", err)
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}
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return Error(500, "Unable to load datasource meta data", err)
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}
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request := &tsdb.TsdbQuery{TimeRange: timeRange}
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for _, query := range reqDto.Queries {
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request.Queries = append(request.Queries, &tsdb.Query{
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RefId: query.Get("refId").MustString("A"),
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MaxDataPoints: query.Get("maxDataPoints").MustInt64(100),
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IntervalMs: query.Get("intervalMs").MustInt64(1000),
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Model: query,
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DataSource: ds,
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})
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}
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resp, err := tsdb.HandleRequest(c.Req.Context(), ds, request)
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if err != nil {
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return Error(500, "Metric request error", err)
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}
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statusCode := 200
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for _, res := range resp.Results {
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if res.Error != nil {
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res.ErrorString = res.Error.Error()
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resp.Message = res.ErrorString
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statusCode = 400
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}
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}
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return JSON(statusCode, &resp)
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}
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// GET /api/tsdb/testdata/scenarios
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func GetTestDataScenarios(c *m.ReqContext) Response {
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result := make([]interface{}, 0)
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for _, scenario := range testdata.ScenarioRegistry {
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result = append(result, map[string]interface{}{
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"id": scenario.Id,
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"name": scenario.Name,
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"description": scenario.Description,
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"stringInput": scenario.StringInput,
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})
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}
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return JSON(200, &result)
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}
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// Generates a index out of range error
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func GenerateError(c *m.ReqContext) Response {
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var array []string
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return JSON(200, array[20])
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}
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// GET /api/tsdb/testdata/gensql
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func GenerateSQLTestData(c *m.ReqContext) Response {
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if err := bus.Dispatch(&m.InsertSqlTestDataCommand{}); err != nil {
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return Error(500, "Failed to insert test data", err)
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}
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return JSON(200, &util.DynMap{"message": "OK"})
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}
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// GET /api/tsdb/testdata/random-walk
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func GetTestDataRandomWalk(c *m.ReqContext) Response {
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from := c.Query("from")
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to := c.Query("to")
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intervalMs := c.QueryInt64("intervalMs")
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timeRange := tsdb.NewTimeRange(from, to)
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request := &tsdb.TsdbQuery{TimeRange: timeRange}
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dsInfo := &m.DataSource{Type: "testdata"}
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request.Queries = append(request.Queries, &tsdb.Query{
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RefId: "A",
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IntervalMs: intervalMs,
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Model: simplejson.NewFromAny(&util.DynMap{
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"scenario": "random_walk",
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}),
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DataSource: dsInfo,
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})
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resp, err := tsdb.HandleRequest(context.Background(), dsInfo, request)
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if err != nil {
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return Error(500, "Metric request error", err)
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}
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return JSON(200, &resp)
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}
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