114 lines
4.0 KiB
Go
114 lines
4.0 KiB
Go
package settings
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import (
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"fmt"
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"os"
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"time"
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"github.com/qdm12/gosettings"
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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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// Health contains settings for the healthcheck and health server.
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type Health struct {
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// ServerAddress is the listening address
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// for the health check server.
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// It cannot be the empty string in the internal state.
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ServerAddress string
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// ReadHeaderTimeout is the HTTP server header read timeout
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// duration of the HTTP server. It defaults to 100 milliseconds.
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ReadHeaderTimeout time.Duration
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// ReadTimeout is the HTTP read timeout duration of the
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// HTTP server. It defaults to 500 milliseconds.
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ReadTimeout time.Duration
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// TargetAddress is the address (host or host:port)
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// to TCP dial to periodically for the health check.
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// It cannot be the empty string in the internal state.
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TargetAddress string
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// SuccessWait is the duration to wait to re-run the
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// healthcheck after a successful healthcheck.
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// It defaults to 5 seconds and cannot be zero in
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// the internal state.
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SuccessWait time.Duration
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// VPN has health settings specific to the VPN loop.
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VPN HealthyWait
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}
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func (h Health) Validate() (err error) {
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uid := os.Getuid()
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err = address.Validate(h.ServerAddress,
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address.OptionListening(uid))
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if err != nil {
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return fmt.Errorf("server listening address is not valid: %w", err)
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}
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err = h.VPN.validate()
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if err != nil {
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return fmt.Errorf("health VPN settings: %w", err)
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}
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return nil
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}
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func (h *Health) copy() (copied Health) {
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return Health{
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ServerAddress: h.ServerAddress,
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ReadHeaderTimeout: h.ReadHeaderTimeout,
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ReadTimeout: h.ReadTimeout,
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TargetAddress: h.TargetAddress,
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SuccessWait: h.SuccessWait,
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VPN: h.VPN.copy(),
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}
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}
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// MergeWith merges the other settings into any
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// unset field of the receiver settings object.
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func (h *Health) MergeWith(other Health) {
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h.ServerAddress = gosettings.MergeWithString(h.ServerAddress, other.ServerAddress)
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h.ReadHeaderTimeout = gosettings.MergeWithNumber(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
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h.ReadTimeout = gosettings.MergeWithNumber(h.ReadTimeout, other.ReadTimeout)
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h.TargetAddress = gosettings.MergeWithString(h.TargetAddress, other.TargetAddress)
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h.SuccessWait = gosettings.MergeWithNumber(h.SuccessWait, other.SuccessWait)
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h.VPN.mergeWith(other.VPN)
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}
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// OverrideWith overrides fields of the receiver
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// settings object with any field set in the other
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// settings.
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func (h *Health) OverrideWith(other Health) {
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h.ServerAddress = gosettings.OverrideWithString(h.ServerAddress, other.ServerAddress)
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h.ReadHeaderTimeout = gosettings.OverrideWithNumber(h.ReadHeaderTimeout, other.ReadHeaderTimeout)
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h.ReadTimeout = gosettings.OverrideWithNumber(h.ReadTimeout, other.ReadTimeout)
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h.TargetAddress = gosettings.OverrideWithString(h.TargetAddress, other.TargetAddress)
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h.SuccessWait = gosettings.OverrideWithNumber(h.SuccessWait, other.SuccessWait)
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h.VPN.overrideWith(other.VPN)
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}
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func (h *Health) SetDefaults() {
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h.ServerAddress = gosettings.DefaultString(h.ServerAddress, "127.0.0.1:9999")
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const defaultReadHeaderTimeout = 100 * time.Millisecond
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h.ReadHeaderTimeout = gosettings.DefaultNumber(h.ReadHeaderTimeout, defaultReadHeaderTimeout)
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const defaultReadTimeout = 500 * time.Millisecond
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h.ReadTimeout = gosettings.DefaultNumber(h.ReadTimeout, defaultReadTimeout)
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h.TargetAddress = gosettings.DefaultString(h.TargetAddress, "cloudflare.com:443")
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const defaultSuccessWait = 5 * time.Second
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h.SuccessWait = gosettings.DefaultNumber(h.SuccessWait, defaultSuccessWait)
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h.VPN.setDefaults()
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}
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func (h Health) String() string {
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return h.toLinesNode().String()
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}
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func (h Health) toLinesNode() (node *gotree.Node) {
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node = gotree.New("Health settings:")
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node.Appendf("Server listening address: %s", h.ServerAddress)
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node.Appendf("Target address: %s", h.TargetAddress)
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node.Appendf("Duration to wait after success: %s", h.SuccessWait)
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node.Appendf("Read header timeout: %s", h.ReadHeaderTimeout)
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node.Appendf("Read timeout: %s", h.ReadTimeout)
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node.AppendNode(h.VPN.toLinesNode("VPN"))
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return node
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}
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