Function BuildQueryRangeRequest

pkg/api/http.go:435–487

BuildQueryRangeRequest takes a tempopb.QueryRangeRequest and populates the passed http.Request dedicatedColumnsJSON should be generated using the DedicatedColumnsToJSON struct which produces the expected string value and memoizes results to prevent redundant marshaling.

(req *http.Request, searchReq *tempopb.QueryRangeRequest, dedicatedColumnsJSON string)

// dedicatedColumnsJSON should be generated using the DedicatedColumnsToJSON struct which produces the expected string
// value and memoizes results to prevent redundant marshaling.
func BuildQueryRangeRequest(req *http.Request, searchReq *tempopb.QueryRangeRequest, dedicatedColumnsJSON string) *http.Request {
	if req == nil {
		req = &http.Request{
			URL: &url.URL{},
		}
	}

	if searchReq == nil {
		return req
	}

	qb := newQueryBuilder("")
	if searchReq.Start != 0 {
		qb.addParam(urlParamStart, strconv.FormatUint(searchReq.Start, 10))
	}
	if searchReq.End != 0 {
		qb.addParam(urlParamEnd, strconv.FormatUint(searchReq.End, 10))
	}
	if searchReq.Step != 0 { // if step != 0 leave the param out and Tempo will calculate it
		qb.addParam(urlParamStep, time.Duration(searchReq.Step).String())
	}
	qb.addParam(QueryModeKey, searchReq.QueryMode)
	// New RF1 params
	qb.addParam(urlParamBlockID, searchReq.BlockID)
	qb.addParam(urlParamStartPage, strconv.Itoa(int(searchReq.StartPage)))
	qb.addParam(urlParamPagesToSearch, strconv.Itoa(int(searchReq.PagesToSearch)))
	qb.addParam(urlParamVersion, searchReq.Version)
	qb.addParam("encoding", "none")
	qb.addParam(urlParamSize, strconv.Itoa(int(searchReq.Size_)))
	qb.addParam(urlParamFooterSize, strconv.Itoa(int(searchReq.FooterSize)))

	if len(dedicatedColumnsJSON) > 0 && dedicatedColumnsJSON != "null" { // if a caller marshals a nil dedicated cols we will receive the string "null"
		qb.addParam(urlParamDedicatedColumns, dedicatedColumnsJSON)
	}

	if len(searchReq.Query) > 0 {
		qb.addParam(urlParamQuery, searchReq.Query)
	}

	qb.addParam(urlParamExemplars, strconv.FormatUint(uint64(searchReq.Exemplars), 10))
	qb.addParam(urlMaxSeries, strconv.Itoa(int(searchReq.MaxSeries)))
	if searchReq.HasInstant() {
		qb.addParam(urlInstant, strconv.FormatBool(searchReq.GetInstant()))
	}

	if len(searchReq.SkipASTTransformations) > 0 {
		qb.addParam(urlParamSkipASTTransformations, strings.Join(searchReq.SkipASTTransformations, ","))
	}

	req.URL.RawQuery = qb.query()

	return req
}

// Generic helper to append query parameters to an http request with less allocations
func BuildQueryRequest(req *http.Request, queryParams map[string]string) *http.Request {