Deps update:

- dgraph-io/badger/v4 to v4.0.1

When sending HTTP requests, make sure to also send Cache-Control :
no-cache and Pragma: no-cache

Update deps for contrib random_delete_test.

contrib/random_delete_test/go.mod

@@ -3,8 +3,8 @@ module github.com/dkorunic/e-dnevnik-bot/contrib
 go 1.20
 
 require (
-	filippo.io/mostly-harmless/cryptosource v0.0.0-20230118130925-0e48fbe82492
-	github.com/dgraph-io/badger/v3 v3.2103.5
+	filippo.io/mostly-harmless/cryptosource v0.0.0-20230306161022-15e20eab989c
+	github.com/dgraph-io/badger/v4 v4.0.1
 )
 
 require (
@@ -13,15 +13,15 @@ require (
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/glog v1.0.0 // indirect
+	github.com/golang/glog v1.1.0 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/flatbuffers/go v0.0.0-20230110200425-62e4d2e5b215 // indirect
-	github.com/klauspost/compress v1.15.15 // indirect
+	github.com/klauspost/compress v1.16.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	go.opencensus.io v0.24.0 // indirect
-	golang.org/x/net v0.5.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 )

contrib/random_delete_test/main.go

@@ -28,7 +28,7 @@ import (
 
 	"filippo.io/mostly-harmless/cryptosource"
 
-	"github.com/dgraph-io/badger/v3"
+	"github.com/dgraph-io/badger/v4"
 )
 
 const (

db/db.go

@@ -29,7 +29,7 @@ import (
 
 	"github.com/dkorunic/e-dnevnik-bot/logger"
 
-	"github.com/dgraph-io/badger/v3"
+	"github.com/dgraph-io/badger/v4"
 )
 
 const (

fetch/fetch.go

@@ -77,7 +77,7 @@ func (c *Client) Login() error {
 // GetClassEvents attempts to fetch all subjects and their grades, as well as all calendar events for exams in ICS
 // format, returning raw grades listing body, parsed exam events and optional error.
 func (c *Client) GetClassEvents(classID string) (string, Events, error) {
-	// do class action to switch active class
+	// do class action to switch active class to class ID
 	err := c.doClassAction(classID)
 	if err != nil {
 		return "", Events{}, err
@@ -101,7 +101,7 @@ func (c *Client) GetClassEvents(classID string) (string, Events, error) {
 // GetClasses attempts to fetch all courses where a student has been previously enlisted or still is (multiple
 // active classes possible).
 func (c *Client) GetClasses() (string, error) {
-	// fetch all classes
+	// fetch all active classes
 	rawClasses, err := c.getClasses()
 	if err != nil {
 		return "", err

fetch/helpers.go

@@ -47,6 +47,8 @@ func (c *Client) getCSRFToken() error {
 		return err
 	}
 	req.Header.Set("User-Agent", c.userAgent)
+	req.Header.Set("Cache-Control", "no-cache")
+	req.Header.Set("Pragma", "no-cache")
 
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
@@ -105,6 +107,8 @@ func (c *Client) doSAMLRequest() error {
 	}
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 	req.Header.Set("User-Agent", c.userAgent)
+	req.Header.Set("Cache-Control", "no-cache")
+	req.Header.Set("Pragma", "no-cache")
 	req.Header.Set("Referer", LoginURL)
 
 	resp, err := c.httpClient.Do(req)
@@ -141,6 +145,8 @@ func (c *Client) getGrades() (string, error) {
 		return "", err
 	}
 	req.Header.Set("User-Agent", c.userAgent)
+	req.Header.Set("Cache-Control", "no-cache")
+	req.Header.Set("Pragma", "no-cache")
 	req.Header.Set("Referer", LoginURL)
 
 	resp, err := c.httpClient.Do(req)
@@ -178,6 +184,8 @@ func (c *Client) getCalendar() (Events, error) {
 		return Events{}, err
 	}
 	req.Header.Set("User-Agent", c.userAgent)
+	req.Header.Set("Cache-Control", "no-cache")
+	req.Header.Set("Pragma", "no-cache")
 	req.Header.Set("Referer", LoginURL)
 
 	resp, err := c.httpClient.Do(req)
@@ -222,6 +230,8 @@ func (c *Client) getClasses() (string, error) {
 		return "", err
 	}
 	req.Header.Set("User-Agent", c.userAgent)
+	req.Header.Set("Cache-Control", "no-cache")
+	req.Header.Set("Pragma", "no-cache")
 	req.Header.Set("Referer", LoginURL)
 
 	resp, err := c.httpClient.Do(req)
@@ -258,6 +268,8 @@ func (c *Client) doClassAction(classID string) error {
 		return err
 	}
 	req.Header.Set("User-Agent", c.userAgent)
+	req.Header.Set("Cache-Control", "no-cache")
+	req.Header.Set("Pragma", "no-cache")
 	req.Header.Set("Referer", LoginURL)
 
 	resp, err := c.httpClient.Do(req)

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/avast/retry-go/v4 v4.3.3
 	github.com/bwmarrin/discordgo v0.27.0
 	github.com/corpix/uarand v0.2.0
-	github.com/dgraph-io/badger/v3 v3.2103.5
+	github.com/dgraph-io/badger/v4 v4.0.1
 	github.com/dustin/go-broadcast v0.0.0-20211018055107-71439988bd91
 	github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1
 	github.com/jordic/goics v0.0.0-20210404174824-5a0337b716a0