supernets/hardfiles
supernets/hardfiles
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URL length and expiry on POST request PR #2

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This commit is contained in:
hgw 2023-12-13 09:42:53 +00:00
parent 4dcf1f37a3
commit 345236b2d9
Signed by: hgw
SSH Key Fingerprint: SHA256:diG7RVYHjd3aDYkZWHYcBJbImu+6zfptuUP+3k/wol4
1 changed files with 51 additions and 7 deletions
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58
main.go
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@ -96,12 +96,12 @@ func Zeros(path string, size int64) error {
return nil
}
func NameGen() string {
const chars = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ0123456789"
func NameGen(fileNameLength int) string {
const chars = "abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ0123456789-_"
ll := len(chars)
b := make([]byte, conf.FileLen)
b := make([]byte, fileNameLength)
rand.Read(b) // generates len(b) random bytes
for i := int64(0); i < int64(conf.FileLen); i++ {
for i := int64(0); i < int64(fileNameLength); i++ {
b[i] = chars[int(b[i])%ll]
}
return string(b)
@ -116,7 +116,12 @@ func Exists(path string) bool {
func UploadHandler(w http.ResponseWriter, r *http.Request) {
// expiry time
ttl := int64(conf.TTLSeconds)
var name string
var ttl int64
var fileNameLength int
fileNameLength = 0
ttl = 0
file, _, err := r.FormFile("file")
if err != nil {
@ -132,10 +137,49 @@ func UploadHandler(w http.ResponseWriter, r *http.Request) {
}
file.Seek(0, 0)
// Check if expiry time is present and length is too long
if r.PostFormValue("expiry") != "" {
ttl, err = strconv.ParseInt(r.PostFormValue("expiry"), 10, 64)
if err != nil {
log.Error().Err(err).Msg("expiry could not be parsed")
} else {
// 5 days max
if ttl < 1 || ttl > 432000 {
w.WriteHeader(http.StatusBadRequest)
return
}
}
}
// Default to conf if not present
if ttl == 0 {
ttl = int64(conf.TTLSeconds)
}
// Check if the file length parameter exists and also if it's too long
if r.PostFormValue("url_len") != "" {
fileNameLength, err = strconv.Atoi(r.PostFormValue("url_len"))
if err != nil {
log.Error().Err(err).Msg("url_len could not be parsed")
} else {
// if the length is < 3 and > 128 return error
if fileNameLength < 3 || fileNameLength > 128 {
w.WriteHeader(http.StatusBadRequest)
return
}
}
}
// Default to conf if not present
if fileNameLength == 0 {
fileNameLength = conf.FileLen
}
// generate + check name
var name string
for {
id := NameGen()
id := NameGen(fileNameLength)
name = id + mtype.Extension()
if !Exists(conf.FileFolder + "/" + name) {
break