func Expr(t miniprofiler.Timer, w http.ResponseWriter, r *http.Request) (interface{}, error) {
e, err := expr.New(r.FormValue("q"), schedule.Conf.Funcs())
if err != nil {
return nil, err
}
now, err := getTime(r)
if err != nil {
return nil, err
}
// it may not strictly be necessary to recreate the contexts each time, but we do to be safe
tsdbContext := schedule.Conf.TSDBContext()
graphiteContext := schedule.Conf.GraphiteContext()
ls := schedule.Conf.LogstashElasticHosts
res, queries, err := e.Execute(tsdbContext, graphiteContext, ls, cacheObj, t, now, 0, false, schedule.Search, nil, nil)
if err != nil {
return nil, err
}
for _, r := range res.Results {
if r.Computations == nil {
r.Computations = make(expr.Computations, 0)
}
}
ret := struct {
Type string
Results []*expr.Result
Queries map[string]opentsdb.Request
}{
e.Tree.Root.Return().String(),
res.Results,
make(map[string]opentsdb.Request),
}
for _, q := range queries {
if e, err := url.QueryUnescape(q.String()); err == nil {
ret.Queries[e] = q
}
}
return ret, nil
}
func Expr(t miniprofiler.Timer, w http.ResponseWriter, r *http.Request) (v interface{}, err error) {
defer func() {
if pan := recover(); pan != nil {
v = nil
err = fmt.Errorf("%v", pan)
}
}()
text, err := ioutil.ReadAll(r.Body)
if err != nil {
return nil, err
}
lines := strings.Split(strings.TrimSpace(string(text)), "\n")
var expression string
vars := map[string]string{}
varRegex := regexp.MustCompile(`(\$\w+)\s*=(.*)`)
for i, line := range lines {
line = strings.TrimSpace(line)
if line == "" {
continue
}
// last line is expression we care about
if i == len(lines)-1 {
expression = schedule.Conf.Expand(line, vars, false)
} else { // must be a variable declatation
matches := varRegex.FindStringSubmatch(line)
if len(matches) == 0 {
return nil, fmt.Errorf("Expect all lines before final expression to be variable declarations of form `$foo = something`")
}
name := strings.TrimSpace(matches[1])
value := strings.TrimSpace(matches[2])
vars[name] = schedule.Conf.Expand(value, vars, false)
}
}
e, err := expr.New(expression, schedule.Conf.Funcs())
if err != nil {
return nil, err
}
now, err := getTime(r)
if err != nil {
return nil, err
}
// it may not strictly be necessary to recreate the contexts each time, but we do to be safe
tsdbContext := schedule.Conf.TSDBContext()
graphiteContext := schedule.Conf.GraphiteContext()
ls := schedule.Conf.LogstashElasticHosts
influx := schedule.Conf.InfluxConfig
es := schedule.Conf.ElasticHosts
res, queries, err := e.Execute(tsdbContext, graphiteContext, ls, es, influx, cacheObj, t, now, 0, false, schedule.Search, nil, nil)
if err != nil {
return nil, err
}
for _, r := range res.Results {
if r.Computations == nil {
r.Computations = make(models.Computations, 0)
}
}
ret := struct {
Type string
Results []*expr.Result
Queries map[string]opentsdb.Request
}{
e.Tree.Root.Return().String(),
res.Results,
make(map[string]opentsdb.Request),
}
for _, q := range queries {
if e, err := url.QueryUnescape(q.String()); err == nil {
ret.Queries[e] = q
}
}
return ret, nil
}