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headers.go
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/
headers.go
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package api
import (
"fmt"
"net/http"
"os"
"strconv"
)
// ParseFileHeaders extracts the file ownership, type, mode and operation type from HTTP headers.
func ParseFileHeaders(headers http.Header) (int64, int64, int, string, string) {
getHeader := func(key string) string {
value := headers.Get(fmt.Sprintf("X-Incus-%s", key))
if value == "" {
// Legacy support.
value = headers.Get(fmt.Sprintf("X-LXD-%s", key))
}
return value
}
uid, err := strconv.ParseInt(getHeader("uid"), 10, 64)
if err != nil {
uid = -1
}
gid, err := strconv.ParseInt(getHeader("gid"), 10, 64)
if err != nil {
gid = -1
}
mode, err := strconv.Atoi(getHeader("mode"))
if err != nil {
mode = -1
} else {
rawMode, err := strconv.ParseInt(getHeader("mode"), 0, 0)
if err == nil {
mode = int(os.FileMode(rawMode) & os.ModePerm)
}
}
fileType := getHeader("type")
if fileType == "" {
// Default is standard file.
fileType = "file"
}
writeMode := getHeader("write")
if writeMode == "" {
// Default is to override the content.
writeMode = "overwrite"
}
return uid, gid, mode, fileType, writeMode
}