104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
package httpserver
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import (
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"errors"
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"fmt"
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"net/http"
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"os"
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"time"
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"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
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"github.com/qdm12/gotree"
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"github.com/qdm12/govalid/address"
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)
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type Settings struct {
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// Address is the server listening address.
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// It defaults to :8000.
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Address string
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// Handler is the HTTP Handler to use.
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// It must be set and cannot be left to nil.
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Handler http.Handler
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// Logger is the logger to use.
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// It must be set and cannot be left to nil.
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Logger Logger
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// ShutdownTimeout is the shutdown timeout duration
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// of the HTTP server. It defaults to 3 seconds.
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ShutdownTimeout *time.Duration
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}
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func (s *Settings) SetDefaults() {
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s.Address = helpers.DefaultString(s.Address, ":8000")
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const defaultShutdownTimeout = 3 * time.Second
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s.ShutdownTimeout = helpers.DefaultDuration(s.ShutdownTimeout, defaultShutdownTimeout)
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}
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func (s Settings) Copy() Settings {
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return Settings{
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Address: s.Address,
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Handler: s.Handler,
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Logger: s.Logger,
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ShutdownTimeout: helpers.CopyDurationPtr(s.ShutdownTimeout),
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}
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}
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func (s *Settings) MergeWith(other Settings) {
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s.Address = helpers.MergeWithString(s.Address, other.Address)
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s.Handler = helpers.MergeWithHTTPHandler(s.Handler, other.Handler)
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if s.Logger == nil {
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s.Logger = other.Logger
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}
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s.ShutdownTimeout = helpers.MergeWithDuration(s.ShutdownTimeout, other.ShutdownTimeout)
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}
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func (s *Settings) OverrideWith(other Settings) {
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s.Address = helpers.OverrideWithString(s.Address, other.Address)
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s.Handler = helpers.OverrideWithHTTPHandler(s.Handler, other.Handler)
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if other.Logger != nil {
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s.Logger = other.Logger
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}
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s.ShutdownTimeout = helpers.OverrideWithDuration(s.ShutdownTimeout, other.ShutdownTimeout)
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}
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var (
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ErrHandlerIsNotSet = errors.New("HTTP handler cannot be left unset")
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ErrLoggerIsNotSet = errors.New("logger cannot be left unset")
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ErrShutdownTimeoutTooSmall = errors.New("shutdown timeout is too small")
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)
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func (s Settings) Validate() (err error) {
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uid := os.Getuid()
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_, err = address.Validate(s.Address, address.OptionListening(uid))
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if err != nil {
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return err
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}
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if s.Handler == nil {
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return ErrHandlerIsNotSet
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}
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if s.Logger == nil {
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return ErrLoggerIsNotSet
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}
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const minShutdownTimeout = 5 * time.Millisecond
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if *s.ShutdownTimeout < minShutdownTimeout {
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return fmt.Errorf("%w: %s must be at least %s",
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ErrShutdownTimeoutTooSmall,
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*s.ShutdownTimeout, minShutdownTimeout)
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}
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return nil
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}
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func (s Settings) ToLinesNode() (node *gotree.Node) {
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node = gotree.New("HTTP server settings:")
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node.Appendf("Listening address: %s", s.Address)
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node.Appendf("Shutdown timeout: %s", *s.ShutdownTimeout)
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return node
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}
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func (s Settings) String() string {
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return s.ToLinesNode().String()
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}
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