mirror of https://github.com/status-im/consul.git
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package proxy
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/connect/proxy"
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)
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// FlagUpstreams implements the flag.Value interface and allows specifying
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// the -upstream flag multiple times and keeping track of the name of the
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// upstream and the local port.
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//
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// The syntax of the value is "name:addr" where addr can be "port" or
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// "host:port". Examples: "db:8181", "db:127.0.0.10:8282", etc.
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//
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// This would need to be extended for Unix Domain Sockets; how does this get handled
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// addr: path & path:mode is ambigous; maybe path alone could be sorted by checking for a numeric port
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// but iffy
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type FlagUpstreams map[string]proxy.UpstreamConfig
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func (f *FlagUpstreams) String() string {
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return fmt.Sprintf("%v", *f)
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}
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func (f *FlagUpstreams) Set(value string) error {
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idx := strings.Index(value, ":")
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if idx == -1 {
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return fmt.Errorf("Upstream value should be name:addr in %q", value)
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}
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addr := ""
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name := value[:idx]
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portRaw := value[idx+1:]
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if idx := strings.Index(portRaw, ":"); idx != -1 {
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addr = portRaw[:idx]
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portRaw = portRaw[idx+1:]
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}
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destinationType := "service"
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if idx := strings.Index(name, "."); idx != -1 {
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typ := name[idx+1:]
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name = name[:idx]
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switch typ {
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case "", "service":
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destinationType = "service"
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case "query":
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destinationType = "prepared_query"
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default:
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return fmt.Errorf(
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"Upstream type must be blank, 'service', or 'query'. Got: %q", typ)
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}
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}
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port, err := strconv.ParseInt(portRaw, 0, 0)
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if err != nil {
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return err
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}
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if *f == nil {
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*f = make(map[string]proxy.UpstreamConfig)
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}
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(*f)[name] = proxy.UpstreamConfig{
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LocalBindAddress: addr,
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LocalBindPort: int(port),
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DestinationName: name,
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DestinationType: api.UpstreamDestType(destinationType),
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}
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return nil
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}
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