func ListVariables(ctx context.Context, ds *datastore.Datastore, w http.ResponseWriter, req *http.Request) {
prefix := req.FormValue("p")
if prefix == "" {
prefix = "/*"
}
if prefix[len(prefix)-1] != '*' {
prefix = prefix + "*"
}
v := variable.NewFromString(prefix)
vars := make(map[string]*oproto.StreamVariable)
for stream := range ds.Reader(ctx, v) {
vars[stream.Variable.Name] = stream.Variable
}
if len(vars) == 0 {
w.WriteHeader(404)
return
}
w.WriteHeader(200)
keys := make([]string, len(vars))
i := 0
for k := range vars {
keys[i] = k
i++
}
sort.Strings(keys)
out, _ := json.Marshal(keys)
w.Header().Set("Content-Type", "text/json")
w.Write(out)
}
func GetBlocks(ctx context.Context, ds *datastore.Datastore, w http.ResponseWriter, req *http.Request) {
b := []*oproto.Block{}
for _, block := range ds.Blocks() {
b = append(b, block.ToProto())
}
datastore.ProtoBlockBy(func(a, b *oproto.Block) bool { return a.EndKey < b.EndKey }).Sort(b)
out, _ := json.Marshal(b)
w.Header().Set("Content-Type", "text/json")
w.Write(out)
}
func Add(ctx context.Context, ds *datastore.Datastore, w http.ResponseWriter, req *http.Request) {
var request oproto.AddRequest
var response oproto.AddResponse
if parseRequest(w, req, &request) != nil {
return
}
in := ds.Writer(ctx)
for _, stream := range request.Stream {
in <- stream
}
close(in)
response.Success = true
returnResponse(w, req, &response)
}
func InspectVariable(ctx context.Context, ds *datastore.Datastore, w http.ResponseWriter, req *http.Request) {
t, err := template.ParseFiles(fmt.Sprintf("%s/inspect_variable.html", *templatePath))
if err != nil {
openinstrument.Logf(ctx, "Couldn't find template file: %s", err)
return
}
type varInfo struct {
Name string
FirstTimestamp time.Time
LastTimestamp time.Time
}
p := struct {
Title string
Query string
Variables []varInfo
}{
Title: "Inspect Variable",
Query: req.FormValue("q"),
Variables: make([]varInfo, 0),
}
if p.Query == "" {
w.WriteHeader(404)
fmt.Fprintf(w, "Specify q=")
return
}
v := variable.NewFromString(p.Query)
c := ds.Reader(ctx, v)
for stream := range c {
lt := stream.Value[len(stream.Value)-1].EndTimestamp
if lt == 0 {
lt = stream.Value[len(stream.Value)-1].Timestamp
}
p.Variables = append(p.Variables, varInfo{
Name: variable.ProtoToString(stream.Variable),
FirstTimestamp: time.Unix(int64(stream.Value[0].Timestamp/1000), 0),
LastTimestamp: time.Unix(int64(lt/1000), 0),
})
}
err = t.Execute(w, p)
if err != nil {
log.Println(err)
}
}
func Query(ctx context.Context, ds *datastore.Datastore, w http.ResponseWriter, req *http.Request) {
query := req.FormValue("q")
showValues := req.FormValue("v") == "1"
type Result struct {
Variable string `json:"name"`
Values [][]interface{} `json:"values"`
}
var duration *time.Duration
requestVariable := variable.NewFromString(query)
if req.FormValue("d") != "" {
d, err := time.ParseDuration(req.FormValue("d"))
if err != nil {
w.WriteHeader(401)
fmt.Fprintf(w, "Invalid duration")
return
}
duration = &d
requestVariable.MinTimestamp = int64(time.Now().UnixNano()-d.Nanoseconds()) / 1000000
}
if query == "" {
w.WriteHeader(401)
fmt.Fprintf(w, "Specify q=")
return
}
results := make([]Result, 0)
for stream := range ds.Reader(ctx, requestVariable) {
r := Result{
Variable: variable.ProtoToString(stream.Variable),
}
if !showValues {
results = append(results, r)
continue
}
r.Values = make([][]interface{}, 0)
if duration == nil {
// Latest value only
if len(stream.Value) > 0 {
v := stream.Value[len(stream.Value)-1]
r.Values = append(r.Values, []interface{}{v.Timestamp, v.DoubleValue})
}
} else {
// All values over a specific time period
for _, v := range stream.Value {
if requestVariable.MinTimestamp == 0 || requestVariable.MinTimestamp > int64(v.Timestamp) {
r.Values = append(r.Values, []interface{}{v.Timestamp, v.DoubleValue})
}
}
}
results = append(results, r)
}
b, err := json.Marshal(results)
if err != nil {
w.WriteHeader(500)
fmt.Fprintf(w, "Couldn't marshal: %s", err)
return
}
w.WriteHeader(200)
w.Write(b)
}