diff --git a/cmd/hdq/hdq.go b/cmd/hdq/hdq.go
new file mode 100644
index 0000000..02807c7
--- /dev/null
+++ b/cmd/hdq/hdq.go
@@ -0,0 +1,94 @@
+/*
+Copyright 2021 The GoPlus Authors (goplus.org)
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/goplus/hdq/cmd/hdq/internal/base"
+	"github.com/goplus/hdq/cmd/hdq/internal/fetch"
+	"github.com/goplus/hdq/cmd/hdq/internal/help"
+	"github.com/qiniu/x/log"
+
+	_ "github.com/goplus/hdq/fetcher/gopkg"
+	_ "github.com/goplus/hdq/fetcher/hrefs"
+	_ "github.com/goplus/hdq/fetcher/torch"
+	_ "github.com/goplus/hdq/stream/http/cached"
+)
+
+func mainUsage() {
+	help.PrintUsage(os.Stderr, base.Hdq)
+	os.Exit(2)
+}
+
+func init() {
+	flag.Usage = mainUsage
+	base.Hdq.Commands = []*base.Command{
+		fetch.Cmd,
+	}
+}
+
+func main() {
+	flag.Parse()
+	args := flag.Args()
+	if len(args) < 1 {
+		flag.Usage()
+	}
+	log.SetFlags(log.Ldefault &^ log.LstdFlags)
+
+	base.CmdName = args[0] // for error messages
+	if args[0] == "help" {
+		help.Help(os.Stderr, args[1:])
+		return
+	}
+
+BigCmdLoop:
+	for bigCmd := base.Hdq; ; {
+		for _, cmd := range bigCmd.Commands {
+			if cmd.Name() != args[0] {
+				continue
+			}
+			args = args[1:]
+			if len(cmd.Commands) > 0 {
+				bigCmd = cmd
+				if len(args) == 0 {
+					help.PrintUsage(os.Stderr, bigCmd)
+					os.Exit(2)
+				}
+				if args[0] == "help" {
+					help.Help(os.Stderr, append(strings.Split(base.CmdName, " "), args[1:]...))
+					return
+				}
+				base.CmdName += " " + args[0]
+				continue BigCmdLoop
+			}
+			if !cmd.Runnable() {
+				continue
+			}
+			cmd.Run(cmd, args)
+			return
+		}
+		helpArg := ""
+		if i := strings.LastIndex(base.CmdName, " "); i >= 0 {
+			helpArg = " " + base.CmdName[:i]
+		}
+		fmt.Fprintf(os.Stderr, "hdq %s: unknown command\nRun 'hdq help%s' for usage.\n", base.CmdName, helpArg)
+		os.Exit(2)
+	}
+}
diff --git a/cmd/hdq/internal/base/base.go b/cmd/hdq/internal/base/base.go
new file mode 100644
index 0000000..f7c55e2
--- /dev/null
+++ b/cmd/hdq/internal/base/base.go
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2023 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Package base defines shared basic pieces of the hdq command,
+// in particular logging and the Command structure.
+package base
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// A Command is an implementation of a gop command
+// like gop export or gop install.
+type Command struct {
+	// Run runs the command.
+	// The args are the arguments after the command name.
+	Run func(cmd *Command, args []string)
+
+	// UsageLine is the one-line usage message.
+	// The words between "gop" and the first flag or argument in the line are taken to be the command name.
+	UsageLine string
+
+	// Short is the short description shown in the 'gop help' output.
+	Short string
+
+	// Flag is a set of flags specific to this command.
+	Flag flag.FlagSet
+
+	// Commands lists the available commands and help topics.
+	// The order here is the order in which they are printed by 'gop help'.
+	// Note that subcommands are in general best avoided.
+	Commands []*Command
+}
+
+// Hdq command
+var Hdq = &Command{
+	UsageLine: "hdq",
+	Short:     `hdq - a HTML DOM Query Language for Go+`,
+	// Commands initialized in package main
+}
+
+// LongName returns the command's long name: all the words in the usage line between "gop" and a flag or argument,
+func (c *Command) LongName() string {
+	name := c.UsageLine
+	if i := strings.Index(name, " ["); i >= 0 {
+		name = name[:i]
+	}
+	if name == "hdq" {
+		return ""
+	}
+	return strings.TrimPrefix(name, "hdq ")
+}
+
+// Name returns the command's short name: the last word in the usage line before a flag or argument.
+func (c *Command) Name() string {
+	name := c.LongName()
+	if i := strings.LastIndex(name, " "); i >= 0 {
+		name = name[i+1:]
+	}
+	return name
+}
+
+// Usage show the command usage.
+func (c *Command) Usage(w io.Writer) {
+	fmt.Fprintf(w, "%s\n\nUsage: %s\n", c.Short, c.UsageLine)
+
+	// restore output of flag
+	defer c.Flag.SetOutput(c.Flag.Output())
+
+	c.Flag.SetOutput(w)
+	c.Flag.PrintDefaults()
+	fmt.Fprintln(w)
+	os.Exit(2)
+}
+
+// Runnable reports whether the command can be run; otherwise
+// it is a documentation pseudo-command.
+func (c *Command) Runnable() bool {
+	return c.Run != nil
+}
+
+// Usage is the usage-reporting function, filled in by package main
+// but here for reference by other packages.
+//
+// flag.Usage func()
+
+// CmdName - "build", "install", "list", "mod tidy", etc.
+var CmdName string
+
+// Main runs a command.
+func Main(c *Command, app string, args []string) {
+	name := c.UsageLine
+	if i := strings.Index(name, " ["); i >= 0 {
+		c.UsageLine = app + name[i:]
+	}
+	c.Run(c, args)
+}
diff --git a/cmd/hdq/internal/fetch/fetch.go b/cmd/hdq/internal/fetch/fetch.go
new file mode 100644
index 0000000..5b8e975
--- /dev/null
+++ b/cmd/hdq/internal/fetch/fetch.go
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Package fetch implements the "hdq fetch" command.
+package fetch
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/goplus/hdq/cmd/hdq/internal/base"
+	"github.com/goplus/hdq/fetcher"
+)
+
+// hdq fetch
+var Cmd = &base.Command{
+	UsageLine: "hdq fetch [flags] pageType [input ...]",
+	Short:     "Fetch objects from the html source with the specified pageType and input",
+}
+
+func init() {
+	Cmd.Run = runCmd
+}
+
+func runCmd(cmd *base.Command, args []string) {
+	if len(args) < 2 {
+		cmd.Usage(os.Stderr)
+		return
+	}
+	pageType := args[0]
+	inputs := args[1:]
+	if len(inputs) == 1 && inputs[0] == "-" {
+		b, _ := io.ReadAll(os.Stdin)
+		inputs = strings.Split(strings.TrimSpace(string(b)), " ")
+	}
+	docs := make([]any, 0, len(inputs))
+	for _, input := range inputs {
+		log.Println("==> Fetch", input)
+		doc, err := fetcher.FromInput(pageType, input)
+		if err != nil {
+			panic(err)
+		}
+		docs = append(docs, doc)
+	}
+	enc := json.NewEncoder(os.Stdout)
+	enc.SetIndent("", "  ")
+	enc.Encode(docs)
+}
diff --git a/cmd/hdq/internal/help/help.go b/cmd/hdq/internal/help/help.go
new file mode 100644
index 0000000..46ea3fc
--- /dev/null
+++ b/cmd/hdq/internal/help/help.go
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2023 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Package help implements the "hdq help” command.
+package help
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"strings"
+	"text/template"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/goplus/hdq/cmd/hdq/internal/base"
+)
+
+// Help implements the 'help' command.
+func Help(w io.Writer, args []string) {
+	cmd := base.Hdq
+Args:
+	for i, arg := range args {
+		for _, sub := range cmd.Commands {
+			if sub.Name() == arg {
+				cmd = sub
+				continue Args
+			}
+		}
+
+		// helpSuccess is the help command using as many args as possible that would succeed.
+		helpSuccess := "hdq help"
+		if i > 0 {
+			helpSuccess += " " + strings.Join(args[:i], " ")
+		}
+		fmt.Fprintf(os.Stderr, "hdq help %s: unknown help topic. Run '%s'.\n", strings.Join(args, " "), helpSuccess)
+		os.Exit(2)
+	}
+
+	if len(cmd.Commands) > 0 {
+		PrintUsage(w, cmd)
+	} else {
+		cmd.Usage(w)
+	}
+	// not exit 2: succeeded at 'hdq help cmd'.
+}
+
+var usageTemplate = `{{.Short | trim}}
+
+Usage:
+
+	{{.UsageLine}} <command> [arguments]
+
+The commands are:
+{{range .Commands}}{{if or (.Runnable) .Commands}}
+	{{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}}
+
+Use "hdq help{{with .LongName}} {{.}}{{end}} <command>" for more information about a command.
+
+`
+
+// An errWriter wraps a writer, recording whether a write error occurred.
+type errWriter struct {
+	w   io.Writer
+	err error
+}
+
+func (w *errWriter) Write(b []byte) (int, error) {
+	n, err := w.w.Write(b)
+	if err != nil {
+		w.err = err
+	}
+	return n, err
+}
+
+// tmpl executes the given template text on data, writing the result to w.
+func tmpl(w io.Writer, text string, data interface{}) {
+	t := template.New("top")
+	t.Funcs(template.FuncMap{"trim": strings.TrimSpace, "capitalize": capitalize})
+	template.Must(t.Parse(text))
+	ew := &errWriter{w: w}
+	err := t.Execute(ew, data)
+	if ew.err != nil {
+		// I/O error writing. Ignore write on closed pipe.
+		if strings.Contains(ew.err.Error(), "pipe") {
+			os.Exit(1)
+		}
+		log.Fatalf("writing output: %v", ew.err)
+	}
+	if err != nil {
+		panic(err)
+	}
+}
+
+func capitalize(s string) string {
+	if s == "" {
+		return s
+	}
+	r, n := utf8.DecodeRuneInString(s)
+	return string(unicode.ToTitle(r)) + s[n:]
+}
+
+// PrintUsage prints usage information.
+func PrintUsage(w io.Writer, cmd *base.Command) {
+	bw := bufio.NewWriter(w)
+	tmpl(bw, usageTemplate, cmd)
+	bw.Flush()
+}