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moby--moby/api/server/httputils/form.go

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package httputils
import (
"fmt"
"net/http"
"path/filepath"
"strconv"
"strings"
)
// BoolValue transforms a form value in different formats into a boolean type.
func BoolValue(r *http.Request, k string) bool {
s := strings.ToLower(strings.TrimSpace(r.FormValue(k)))
return !(s == "" || s == "0" || s == "no" || s == "false" || s == "none")
}
// BoolValueOrDefault returns the default bool passed if the query param is
// missing, otherwise it's just a proxy to boolValue above
func BoolValueOrDefault(r *http.Request, k string, d bool) bool {
if _, ok := r.Form[k]; !ok {
return d
}
return BoolValue(r, k)
}
// Int64ValueOrZero parses a form value into an int64 type.
// It returns 0 if the parsing fails.
func Int64ValueOrZero(r *http.Request, k string) int64 {
val, err := Int64ValueOrDefault(r, k, 0)
if err != nil {
return 0
}
return val
}
// Int64ValueOrDefault parses a form value into an int64 type. If there is an
// error, returns the error. If there is no value returns the default value.
func Int64ValueOrDefault(r *http.Request, field string, def int64) (int64, error) {
if r.Form.Get(field) != "" {
value, err := strconv.ParseInt(r.Form.Get(field), 10, 64)
if err != nil {
return value, err
}
return value, nil
}
return def, nil
}
// ArchiveOptions stores archive information for different operations.
type ArchiveOptions struct {
Name string
Path string
}
// ArchiveFormValues parses form values and turns them into ArchiveOptions.
// It fails if the archive name and path are not in the request.
func ArchiveFormValues(r *http.Request, vars map[string]string) (ArchiveOptions, error) {
if err := ParseForm(r); err != nil {
return ArchiveOptions{}, err
}
name := vars["name"]
path := filepath.FromSlash(r.Form.Get("path"))
switch {
case name == "":
return ArchiveOptions{}, fmt.Errorf("bad parameter: 'name' cannot be empty")
case path == "":
return ArchiveOptions{}, fmt.Errorf("bad parameter: 'path' cannot be empty")
}
return ArchiveOptions{name, path}, nil
}