mirror of
https://github.com/ipfs/kubo.git
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ddc8d0c60c
With verbose flag: * remove EnableStdin() flags on all StringArg, * remove all unneeded parsing code for StringArg, and print an * informative message if `ipfs` begins reading from a CharDevice, * remove broken go tests for EnableStdin cli parsing, and add some * trivial test cases for reading FileArg from stdin, * add a panic to prevent EnableStdin from being set on * StringArg in the future. Resolves: #2877, #2870 License: MIT Signed-off-by: Thomas Gardner <tmg@fastmail.com>
80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
package commands
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import (
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"io"
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"strings"
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cmds "github.com/ipfs/go-ipfs/commands"
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namesys "github.com/ipfs/go-ipfs/namesys"
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util "gx/ipfs/QmZNVWh8LLjAavuQ2JXuFmuYH3C11xo988vSgp7UQrTRj1/go-ipfs-util"
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)
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var DNSCmd = &cmds.Command{
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Helptext: cmds.HelpText{
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Tagline: "DNS link resolver.",
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ShortDescription: `
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Multihashes are hard to remember, but domain names are usually easy to
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remember. To create memorable aliases for multihashes, DNS TXT
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records can point to other DNS links, IPFS objects, IPNS keys, etc.
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This command resolves those links to the referenced object.
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`,
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LongDescription: `
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Multihashes are hard to remember, but domain names are usually easy to
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remember. To create memorable aliases for multihashes, DNS TXT
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records can point to other DNS links, IPFS objects, IPNS keys, etc.
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This command resolves those links to the referenced object.
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For example, with this DNS TXT record:
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> dig +short TXT ipfs.io
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dnslink=/ipfs/QmRzTuh2Lpuz7Gr39stNr6mTFdqAghsZec1JoUnfySUzcy
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The resolver will give:
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> ipfs dns ipfs.io
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/ipfs/QmRzTuh2Lpuz7Gr39stNr6mTFdqAghsZec1JoUnfySUzcy
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The resolver can recursively resolve:
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> dig +short TXT recursive.ipfs.io
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dnslink=/ipns/ipfs.io
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> ipfs dns -r recursive.ipfs.io
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/ipfs/QmRzTuh2Lpuz7Gr39stNr6mTFdqAghsZec1JoUnfySUzcy
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`,
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},
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Arguments: []cmds.Argument{
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cmds.StringArg("domain-name", true, false, "The domain-name name to resolve."),
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},
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Options: []cmds.Option{
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cmds.BoolOption("recursive", "r", "Resolve until the result is not a DNS link.").Default(false),
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},
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Run: func(req cmds.Request, res cmds.Response) {
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recursive, _, _ := req.Option("recursive").Bool()
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name := req.Arguments()[0]
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resolver := namesys.NewDNSResolver()
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depth := 1
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if recursive {
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depth = namesys.DefaultDepthLimit
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}
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output, err := resolver.ResolveN(req.Context(), name, depth)
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if err != nil {
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res.SetError(err, cmds.ErrNormal)
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return
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}
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res.SetOutput(&ResolvedPath{output})
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},
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Marshalers: cmds.MarshalerMap{
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cmds.Text: func(res cmds.Response) (io.Reader, error) {
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output, ok := res.Output().(*ResolvedPath)
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if !ok {
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return nil, util.ErrCast()
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}
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return strings.NewReader(output.Path.String() + "\n"), nil
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},
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},
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Type: ResolvedPath{},
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}
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