mhoppa commented on a change in pull request #3758: Rewrote deliveryservice_stats to Go URL: https://github.com/apache/trafficcontrol/pull/3758#discussion_r330270574
########## File path: traffic_ops/traffic_ops_golang/trafficstats/trafficstats.go ########## @@ -0,0 +1,594 @@ +package trafficstats + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +import "database/sql" +import "encoding/json" +import "errors" +import "fmt" +import "net/http" +import "strconv" +import "strings" +import "time" + +import "github.com/apache/trafficcontrol/lib/go-tc" +import "github.com/apache/trafficcontrol/lib/go-rfc" +import "github.com/apache/trafficcontrol/lib/go-log" +import "github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/api" +import "github.com/apache/trafficcontrol/traffic_ops/traffic_ops_golang/tenant" + +import influx "github.com/influxdata/influxdb1-client/v2" + +var ( + metricTypes = map[string]interface{}{ + "kbps": struct{}{}, + "tps_total": struct{}{}, + "tps_2xx": struct{}{}, + "tps_3xx": struct{}{}, + "tps_4xx": struct{}{}, + "tps_5xx": struct{}{}, + } + + jsonWithRFCTimestamps = rfc.MimeType{ + "application/json", + map[string]string{"timestamp": "rfc"}, + } + + jsonWithUnixTimestamps = rfc.MimeType{ + "application/json", + map[string]string{"timestamp": "unix"}, + } +) + +const ( + DEFAULT_INTERVAL = tc.TrafficStatsDuration("1m") + dsTenantIDFromXMLIDQuery = ` + SELECT tenant_id + FROM deliveryservice + WHERE xml_id = $1` + + xmlidFromIDQuery = ` + SELECT xml_id + FROM deliveryservice + WHERE id = $1` + + // TODO: Pretty sure all of this could actually be calculated using the fetched data (assuming an + // interval is given). Check to see if that's faster than doing another synchronous HTTP request. + summaryQuery = ` + SELECT mean(value) AS "average", + percentile(value, 5) AS "fifthPercentile", + percentile(value, 95) AS "ninetyFifthPercentile", + percentile(value, 98) AS "ninetyEighthPercentile", + min(value) AS "min", + max(value) AS "max", + count(value) AS "count" + FROM "%s"."monthly"."%s.ds.1min" + WHERE time >= $start + AND time <= $end + AND cachegroup = 'total' + AND deliveryservice = $xmlid` + + seriesQuery = ` + SELECT mean(value) AS "value" + FROM "%s"."monthly"."%s.ds.1min" + WHERE cachegroup = 'total' + AND deliveryservice = $xmlid + AND time >= $start + AND time <= $end + GROUP BY time(%s, %s), cachegroup%s` +) + +func configFromRequest(r *http.Request, i *api.APIInfo) (tc.TrafficStatsConfig, error, int) { + var c tc.TrafficStatsConfig + var e error + if accept := r.Header.Get("Accept"); accept != "" { + + mimes, err := rfc.MimeTypesFromAccept(accept) + if err != nil { + log.Warnf("Failed to negotiate content, Accept line '%s', error: %v", accept, err) + } else { + + found := false + for _, m := range mimes { + if jsonWithRFCTimestamps.Satisfy(m) { + found = true + break + } + + if jsonWithUnixTimestamps.Satisfy(m) { + found = true + c.Unix = true + break + } + } + + if !found { + e = fmt.Errorf("Failed to negotiate content; cannot produce output satisfying %s", accept) + return c, e, http.StatusNotAcceptable + } + } + } + + if limit, ok := i.Params["limit"]; ok { + lim, err := strconv.ParseUint(limit, 10, 64) + if err != nil { + e = errors.New("Invalid limit!") + return c, e, http.StatusBadRequest + } + c.Limit = &lim + } + + if offset, ok := i.Params["offset"]; ok { + off, err := strconv.ParseUint(offset, 10, 64) + if err != nil { + e = errors.New("Invalid offset!") + return c, e, http.StatusBadRequest + } + c.Offset = &off + } + + if orderby, ok := i.Params["orderby"]; ok { + if c.OrderBy = tc.OrderableFromString(orderby); c.OrderBy == nil { + e = errors.New("Invalid orderby! Must be 'time' or 'value'") + return c, e, http.StatusBadRequest + } + } + + if c.Start, e = parseTime(i.Params["startDate"]); e != nil { + log.Errorf("Parsing startDate: %v", e) + e = errors.New("Invalid startDate!") + return c, e, http.StatusBadRequest + } + + if c.End, e = parseTime(i.Params["endDate"]); e != nil { + log.Errorf("Parsing endDate: %v", e) + e = errors.New("Invalid endDate!") + return c, e, http.StatusBadRequest + } + + if interval, ok := i.Params["interval"]; !ok { + c.Interval = DEFAULT_INTERVAL + } else if c.Interval = tc.TrafficStatsDurationFromString(interval); c.Interval == tc.InvalidDuration { + log.Errorf("Error parsing 'interval' query parameter: %v", e) + e = errors.New("Invalid interval!") + return c, e, http.StatusBadRequest + } + + if ex, ok := i.Params["exclude"]; ok { + switch tc.ExcludeFromString(ex) { + case tc.ExcludeSummary: + c.ExcludeSummary = true + case tc.ExcludeSeries: + c.ExcludeSeries = true + default: + e = errors.New("Invalid exclude! Must be 'series' or 'summary'") + return c, e, http.StatusBadRequest + } + } + + c.MetricType = i.Params["metricType"] + if _, ok := metricTypes[c.MetricType]; !ok { + e = fmt.Errorf("Unknown metric type: %s", c.MetricType) + return c, e, http.StatusBadRequest + } + + var ok bool + if c.DeliveryService, ok = i.Params["deliveryServiceName"]; !ok { + if c.DeliveryService, ok = i.Params["deliveryService"]; !ok { + e = errors.New("You must specify deliveryService or deliveryServiceName!") + return c, e, http.StatusBadRequest + } + + if dsID, err := strconv.ParseUint(c.DeliveryService, 10, 64); err != nil { + // sql.ErrNoRows does not *necessarily* mean the DS doesn't exist - an XMLID can simply + // be numeric, and so it was wrong to treat it as an ID in the first place. + xmlid := c.DeliveryService + var exists bool + if exists, c.DeliveryService, err = getXMLIDFromID(dsID, i.Tx.Tx); err != nil { + log.Errorf("Converting DSID to XMLID: %v", err) + e = errors.New("Internal Server Error") + return c, e, http.StatusInternalServerError + } else if !exists { + c.DeliveryService = xmlid + } + } + } + + return c, nil, http.StatusOK +} + +func GetDSStats(w http.ResponseWriter, r *http.Request) { + // Perl didn't require "interval", but it would only return summary data if it was not given + inf, userErr, sysErr, errCode := api.NewInfo(r, []string{"metricType", "startDate", "endDate"}, nil) + tx := inf.Tx.Tx + if userErr != nil || sysErr != nil { + api.HandleErr(w, r, tx, errCode, userErr, sysErr) + return + } + defer inf.Close() + + var c tc.TrafficStatsConfig + if c, userErr, errCode = configFromRequest(r, inf); userErr != nil { + sysErr = fmt.Errorf("Unable to process deliveryservice_stats request: %v", userErr) + api.HandleErr(w, r, tx, errCode, userErr, sysErr) + return + } + + client, err := inf.CreateInfluxClient() + if err != nil { + errCode = http.StatusInternalServerError + sysErr = err + api.HandleErr(w, r, tx, errCode, nil, sysErr) + return + } else if client == nil { + sysErr = errors.New("Traffic Stats is not configured, but DS stats were requested") + errCode = http.StatusInternalServerError + api.HandleErr(w, r, tx, errCode, nil, sysErr) + return + } + defer (*client).Close() + + exists, dsTenant, err := dsTenantIDFromXMLID(c.DeliveryService, tx) + if err != nil { + sysErr = err + errCode = http.StatusInternalServerError + api.HandleErr(w, r, tx, errCode, nil, sysErr) + return + } else if !exists { + userErr = fmt.Errorf("No such Delivery Service: %s", c.DeliveryService) + errCode = http.StatusNotFound + api.HandleErr(w, r, tx, errCode, userErr, nil) + return + } + + authorized, err := tenant.IsResourceAuthorizedToUserTx(int(dsTenant), inf.User, tx) + if err != nil { + api.HandleErr(w, r, tx, http.StatusInternalServerError, nil, err) + return + } else if !authorized { + // If the Tenant is not authorized to use the resource, then we DON'T tell them that. + // Instead, we don't disclose that such a Delivery Service exists at all - in keeping with + // the behavior of /deliveryservices + // This is different from what Perl used to do, but then again Perl didn't check tenancy at + // all. + userErr = fmt.Errorf("No such Delivery Service: %s", c.DeliveryService) + sysErr = fmt.Errorf("GetDSStats: unauthorized Tenant (#%d) access", inf.User.TenantID) + errCode = http.StatusNotFound + api.HandleErr(w, r, tx, errCode, userErr, sysErr) + return + } + + resp := struct{ Response tc.TrafficStatsResponse }{ Review comment: this needs a json tag so the response is not capitalized on the return ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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