/
api.go
110 lines (92 loc) · 2.92 KB
/
api.go
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package main
import (
"encoding/json"
"log"
"net/http"
"time"
"github.com/Cistern/cistern/internal/query"
"github.com/Preetam/siesta"
)
func service() *siesta.Service {
service := siesta.NewService("/api")
service.Route("OPTIONS", "/collections/:collection/query", "preflight request", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Headers", r.Header.Get("Access-Control-Request-Headers"))
})
service.Route("POST", "/collections/:collection/query", "query a collection", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
var params siesta.Params
collectionName := params.String("collection", "", "collection name")
queryString := params.String("query", "", "query string")
start := params.Int64("start", 0, "Start Unix timestamp")
end := params.Int64("end", 0, "End Unix timestamp")
err := params.Parse(r.Form)
if err != nil {
log.Println(err)
w.WriteHeader(http.StatusBadRequest)
return
}
collectionsLock.Lock()
collection, present := Collections[*collectionName]
collectionsLock.Unlock()
if !present {
w.WriteHeader(http.StatusNotFound)
return
}
queryDesc, err := query.Parse(*queryString)
if err != nil {
log.Println(err)
w.WriteHeader(http.StatusBadRequest)
return
}
log.Println("Got query", *queryString)
queryDesc.TimeRange.Start = time.Unix(*start, 0)
queryDesc.TimeRange.End = time.Unix(*end, 0)
if queryDesc.PointSize > 0 {
// Round off timestamps
queryDesc.TimeRange.Start = queryDesc.TimeRange.Start.Truncate(time.Duration(queryDesc.PointSize * 1000))
queryDesc.TimeRange.End = queryDesc.TimeRange.End.Truncate(time.Duration(queryDesc.PointSize * 1000))
}
log.Println(queryDesc.TimeRange)
for i, filter := range queryDesc.Filters {
var v interface{}
err := json.Unmarshal([]byte(filter.Value.(json.RawMessage)), &v)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
log.Println(err)
return
}
filter.Value = v
queryDesc.Filters[i] = filter
}
result, err := collection.Query(*queryDesc)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
log.Println(err)
}
json.NewEncoder(w).Encode(result)
})
service.Route("POST", "/collections/:collection/compact", "compacts a collection", func(w http.ResponseWriter, r *http.Request) {
var params siesta.Params
collectionName := params.String("collection", "", "collection name")
err := params.Parse(r.Form)
if err != nil {
log.Println(err)
w.WriteHeader(http.StatusBadRequest)
return
}
collectionsLock.Lock()
collection, present := Collections[*collectionName]
collectionsLock.Unlock()
if !present {
w.WriteHeader(http.StatusNotFound)
return
}
err = collection.Compact()
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
log.Println(err)
}
})
return service
}