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backend: save the checksum of each try, to be able to detect duplicates after

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nemunaire 2018-11-21 03:22:42 +01:00 committed by Pierre-Olivier Mercier
parent 44d335bc9f
commit 333bb408e1
3 changed files with 15 additions and 5 deletions
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11
backend/submission.go
View File

@ -11,6 +11,8 @@ import (
"os"
"strconv"
"golang.org/x/crypto/blake2b"
"srs.epita.fr/fic-server/libfic"
)
@ -54,6 +56,13 @@ func treatSubmission(pathname string, team fic.Team, exercice_id string) {
return
}
// Save checksum to treat duplicates
cksum := blake2b.Sum512(cnt_raw)
if err != nil {
log.Println(id, "[ERR] JSON parsing error:", err)
return
}
// Parse it
var responses ResponsesUpload
err = json.Unmarshal(cnt_raw, &responses)
@ -70,7 +79,7 @@ func treatSubmission(pathname string, team fic.Team, exercice_id string) {
}
// Check given answers
solved, err := exercice.CheckResponse(responses.Keys, responses.MCQs, team)
solved, err := exercice.CheckResponse(cksum[:], responses.Keys, responses.MCQs, team)
if err != nil {
log.Println(id, "[ERR] Unable to CheckResponse:", err)
genTeamMyFile(team)

1
libfic/db.go
View File

@ -244,6 +244,7 @@ CREATE TABLE IF NOT EXISTS exercice_tries(
id_exercice INTEGER NOT NULL,
id_team INTEGER NOT NULL,
time TIMESTAMP NOT NULL,
cksum BINARY(64) NOT NULL,
nbdiff INTEGER NOT NULL DEFAULT 0,
FOREIGN KEY(id_exercice) REFERENCES exercices(id_exercice),
FOREIGN KEY(id_team) REFERENCES teams(id_team)

8
libfic/exercice.go
View File

@ -205,8 +205,8 @@ func (e Exercice) GetLevel() (int, error) {
}
// NewTry registers a solving attempt for the given Team.
func (e Exercice) NewTry(t Team) error {
if _, err := DBExec("INSERT INTO exercice_tries (id_exercice, id_team, time) VALUES (?, ?, ?)", e.Id, t.Id, time.Now()); err != nil {
func (e Exercice) NewTry(t Team, cksum []byte) error {
if _, err := DBExec("INSERT INTO exercice_tries (id_exercice, id_team, time, cksum) VALUES (?, ?, ?, ?)", e.Id, t.Id, time.Now(), cksum); err != nil {
return err
} else {
return nil
@ -264,8 +264,8 @@ func (e Exercice) TriedCount() int64 {
// CheckResponse, given both flags and MCQ responses, figures out if thoses are correct (or if they are previously solved).
// In the meanwhile, CheckResponse registers good answers given (but it does not mark the challenge as solved at the end).
func (e Exercice) CheckResponse(respflags map[string]string, respmcq map[int64]bool, t Team) (bool, error) {
if err := e.NewTry(t); err != nil {
func (e Exercice) CheckResponse(cksum []byte, respflags map[string]string, respmcq map[int64]bool, t Team) (bool, error) {
if err := e.NewTry(t, cksum); err != nil {
return false, err
} else if flags, err := e.GetFlags(); err != nil {
return false, err