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feat:#56 added etag hash

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This commit is contained in:
Elmar Kresse
2024-10-04 18:35:09 +02:00
parent 5ce70983f2
commit 97daa7b73c
4 changed files with 27 additions and 6 deletions
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14
services/ical/service/ical/ical.go
View File

@@ -23,6 +23,7 @@ import (
"htwkalender/ical/model"
"htwkalender/ical/service/connector"
htwkalenderGrpc "htwkalender/ical/service/connector/grpc"
"htwkalender/ical/service/functions"
"log/slog"
"time"
)
@@ -31,7 +32,7 @@ const expirationTime = 5 * time.Minute
var FeedDeletedError = fmt.Errorf("feed deleted")
func Feed(app model.AppType, token string) (string, error) {
func Feed(app model.AppType, token string) (string, string, error) {
var events model.Events
modules := map[string]model.FeedCollection{}
@@ -47,17 +48,17 @@ func Feed(app model.AppType, token string) (string, error) {
// get feed by token
feed, err := htwkalenderGrpc.GetFeed(token, app.GrpcClient)
if err != nil {
return "", err
return "", "", err
}
if feed.Deleted {
return "", FeedDeletedError
return "", "", FeedDeletedError
}
// Get all events for modules
events, err = htwkalenderGrpc.GetEvents(feed.Modules, app.GrpcClient)
if err != nil {
return "", err
return "", "", err
}
// Sort events by start date
@@ -68,11 +69,14 @@ func Feed(app model.AppType, token string) (string, error) {
}
}
// Generate one Hash for E-TAG from all events and modules
etag := functions.HashString(events.String() + fmt.Sprint(modules))
b := bytes.Buffer{}
goics.NewICalEncode(&b).Encode(IcalModel{Events: events, Mapping: modules})
icalFeed := &model.FeedModel{Content: b.String(), ExpiresAt: model.JSONTime(time.Now().Add(expirationTime))}
return icalFeed.Content, nil
return icalFeed.Content, etag, nil
}
func FeedRecord(app model.AppType, token string) (model.FeedRecord, error) {

3
services/ical/service/routes.go
View File

@@ -34,7 +34,7 @@ func AddFeedRoutes(app model.AppType) {
app.Fiber.Get("/api/feed", func(c fiber.Ctx) error {
token := c.Query("token")
results, err := ical.Feed(app, token)
results, eTag, err := ical.Feed(app, token)
if errors.Is(err, ical.FeedDeletedError) {
return c.SendStatus(fiber.StatusGone)
@@ -48,6 +48,7 @@ func AddFeedRoutes(app model.AppType) {
c.Response().Header.Set("charset", "utf-8")
c.Response().Header.Set("Content-Disposition", "inline")
c.Response().Header.Set("filename", "calendar.ics")
c.Response().Header.Set("ETag", eTag)
return c.SendString(results)
})