72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package controller
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import (
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"bytes"
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"encoding/json"
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"io"
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"net/http"
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"strconv"
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"datasource/store"
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)
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type Controller struct {
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store *store.Store
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}
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func NewController(store *store.Store) *Controller {
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return &Controller{store: store}
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}
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func (c *Controller) GetMetrics(w http.ResponseWriter, r *http.Request) {
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query := r.URL.Query()
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service := query.Get("service")
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if service == "" {
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http.Error(w, "service cannot be empty", http.StatusBadRequest)
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return
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}
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t0, err := strconv.ParseInt(query.Get("t0"), 10, 64)
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if err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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t1, err := strconv.ParseInt(query.Get("t1"), 10, 64)
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if err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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if t0 > t1 {
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http.Error(w, "t0 cannot be larger than t1", http.StatusBadRequest)
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return
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}
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metrics, err := c.store.GetMetrics(r.Context(), service, t0, t1)
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if err != nil {
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// todo (david): log internal server error
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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var buf bytes.Buffer
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if err := json.NewEncoder(&buf).Encode(metrics); err != nil {
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// todo (david): log internal server error
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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if _, err := io.Copy(w, &buf); err != nil {
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// too late to return http.StatusInternalServerError
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// todo (david): log internal server error
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}
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}
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// todo (david)
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// func (c *Controller) DeleteMetrics(w http.ResponseWriter, r *http.Request) {}
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