Fixing issue with missing target_type values in client package

client/chrome.go

@@ -2,7 +2,7 @@ package client
 
 import "fmt"
 
-//go:generate easyjson -omit_empty -pkg -output_filename easyjson.go
+//go:generate easyjson -omit_empty -output_filename easyjson.go chrome.go
 
 // Chrome holds connection information for a Chrome, Edge, or Safari target.
 //

client/client.go

@@ -2,6 +2,8 @@
 // and related funcs.
 package client
 
+//go:generate go run gen.go
+
 import (
 	"context"
 	"encoding/json"
@@ -35,6 +37,14 @@ var (
 	ErrUnsupportedProtocolVersion = errors.New("unsupported protocol version")
 )
 
+// Target is the common interface for a Chrome Debugging Protocol target.
+type Target interface {
+	String() string
+	GetID() string
+	GetType() TargetType
+	GetWebsocketURL() string
+}
+
 // Client is a Chrome Debugging Protocol client.
 type Client struct {
 	url     string

client/easyjson.go

@@ -67,67 +67,83 @@ func easyjsonC5a4559bEncodeGithubComKnqChromedpClient(out *jwriter.Writer, in Ch
 	first := true
 	_ = first
 	if in.Description != "" {
-		if !first {
+		const prefix string = ",\"description\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"description\":")
 		out.String(string(in.Description))
 	}
 	if in.DevtoolsURL != "" {
-		if !first {
+		const prefix string = ",\"devtoolsFrontendUrl\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"devtoolsFrontendUrl\":")
 		out.String(string(in.DevtoolsURL))
 	}
 	if in.ID != "" {
-		if !first {
+		const prefix string = ",\"id\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"id\":")
 		out.String(string(in.ID))
 	}
 	if in.Title != "" {
-		if !first {
+		const prefix string = ",\"title\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"title\":")
 		out.String(string(in.Title))
 	}
 	if in.Type != "" {
-		if !first {
+		const prefix string = ",\"type\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"type\":")
 		(in.Type).MarshalEasyJSON(out)
 	}
 	if in.URL != "" {
-		if !first {
+		const prefix string = ",\"url\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"url\":")
 		out.String(string(in.URL))
 	}
 	if in.WebsocketURL != "" {
-		if !first {
+		const prefix string = ",\"webSocketDebuggerUrl\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"webSocketDebuggerUrl\":")
 		out.String(string(in.WebsocketURL))
 	}
 	if in.FaviconURL != "" {
-		if !first {
+		const prefix string = ",\"faviconURL\":"
-			out.RawByte(',')
+		if first {
+			first = false
+			out.RawString(prefix[1:])
+		} else {
+			out.RawString(prefix)
 		}
-		first = false
-		out.RawString("\"faviconURL\":")
 		out.String(string(in.FaviconURL))
 	}
 	out.RawByte('}')

client/gen.go

@@ -0,0 +1,142 @@
+// +build ignore
+
+package main
+
+import (
+	"encoding/base64"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os/exec"
+	"regexp"
+	"sort"
+
+	"github.com/knq/snaker"
+)
+
+const (
+	// chromiumSrc is the base chromium source repo location
+	chromiumSrc = "https://chromium.googlesource.com/chromium/src"
+
+	// devtoolsHTTPClientCc contains the target_type names.
+	devtoolsHTTPClientCc = chromiumSrc + "/+/master/chrome/test/chromedriver/chrome/devtools_http_client.cc?format=TEXT"
+)
+
+var (
+	flagOut = flag.String("out", "targettype.go", "out file")
+
+	typeAsStringRE = regexp.MustCompile(`type_as_string\s+==\s+"([^"]+)"`)
+)
+
+func main() {
+	flag.Parse()
+
+	// grab source
+	buf, err := grab(devtoolsHTTPClientCc)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// find names
+	matches := typeAsStringRE.FindAllStringSubmatch(string(buf), -1)
+	names := make([]string, len(matches))
+	for i, m := range matches {
+		names[i] = m[1]
+	}
+	sort.Strings(names)
+
+	// process names
+	var constVals, decodeVals string
+	for _, n := range names {
+		name := snaker.SnakeToCamelIdentifier(n)
+		constVals += fmt.Sprintf("%s TargetType = \"%s\"\n", name, n)
+		decodeVals += fmt.Sprintf("case %s:\n*tt=%s\n", name, name)
+	}
+
+	err = ioutil.WriteFile(*flagOut, []byte(fmt.Sprintf(targetTypeSrc, constVals, decodeVals)), 0644)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = exec.Command("gofmt", "-w", "-s", *flagOut).Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+// grab retrieves a file from the chromium source code.
+func grab(path string) ([]byte, error) {
+	res, err := http.Get(path)
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	buf, err := base64.StdEncoding.DecodeString(string(body))
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+const (
+	targetTypeSrc = `package client
+
+// Code generated by gen.go. DO NOT EDIT.
+
+import (
+	// "errors"
+	easyjson "github.com/mailru/easyjson"
+	jlexer "github.com/mailru/easyjson/jlexer"
+	jwriter "github.com/mailru/easyjson/jwriter"
+)
+
+// TargetType are the types of targets available in Chrome.
+type TargetType string
+
+// TargetType values.
+const (
+%s
+)
+
+// String satisfies stringer.
+func (tt TargetType) String() string {
+	return string(tt)
+}
+
+// MarshalEasyJSON satisfies easyjson.Marshaler.
+func (tt TargetType) MarshalEasyJSON(out *jwriter.Writer) {
+	out.String(string(tt))
+}
+
+// MarshalJSON satisfies json.Marshaler.
+func (tt TargetType) MarshalJSON() ([]byte, error) {
+	return easyjson.Marshal(tt)
+}
+
+// UnmarshalEasyJSON satisfies easyjson.Unmarshaler.
+func (tt *TargetType) UnmarshalEasyJSON(in *jlexer.Lexer) {
+	z := TargetType(in.String())
+	switch z {
+%s
+
+	default:
+		// in.AddError(errors.New("unknown TargetType"))
+		*tt = z
+	}
+}
+
+// UnmarshalJSON satisfies json.Unmarshaler.
+func (tt *TargetType) UnmarshalJSON(buf []byte) error {
+	return easyjson.Unmarshal(buf, tt)
+}
+`
+)

client/targettype.go

@@ -1,31 +1,30 @@
 package client
 
+// Code generated by gen.go. DO NOT EDIT.
+
 import (
-	"errors"
+	// "errors"
-
+	easyjson "github.com/mailru/easyjson"
-	"github.com/mailru/easyjson"
+	jlexer "github.com/mailru/easyjson/jlexer"
-	"github.com/mailru/easyjson/jlexer"
+	jwriter "github.com/mailru/easyjson/jwriter"
-	"github.com/mailru/easyjson/jwriter"
 )
 
-// Target is the common interface for a Chrome Debugging Protocol target.
-type Target interface {
-	String() string
-	GetID() string
-	GetType() TargetType
-	GetWebsocketURL() string
-}
-
 // TargetType are the types of targets available in Chrome.
 type TargetType string
 
 // TargetType values.
 const (
+	App            TargetType = "app"
 	BackgroundPage TargetType = "background_page"
+	Browser        TargetType = "browser"
+	External       TargetType = "external"
+	Iframe         TargetType = "iframe"
 	Other          TargetType = "other"
 	Page           TargetType = "page"
 	ServiceWorker  TargetType = "service_worker"
-	Node           TargetType = "node"
+	SharedWorker   TargetType = "shared_worker"
+	Webview        TargetType = "webview"
+	Worker         TargetType = "worker"
 )
 
 // String satisfies stringer.
@@ -45,20 +44,34 @@ func (tt TargetType) MarshalJSON() ([]byte, error) {
 
 // UnmarshalEasyJSON satisfies easyjson.Unmarshaler.
 func (tt *TargetType) UnmarshalEasyJSON(in *jlexer.Lexer) {
-	switch TargetType(in.String()) {
+	z := TargetType(in.String())
+	switch z {
+	case App:
+		*tt = App
 	case BackgroundPage:
 		*tt = BackgroundPage
+	case Browser:
+		*tt = Browser
+	case External:
+		*tt = External
+	case Iframe:
+		*tt = Iframe
 	case Other:
 		*tt = Other
 	case Page:
 		*tt = Page
 	case ServiceWorker:
 		*tt = ServiceWorker
-	case Node:
+	case SharedWorker:
-		*tt = Node
+		*tt = SharedWorker
+	case Webview:
+		*tt = Webview
+	case Worker:
+		*tt = Worker
 
 	default:
-		in.AddError(errors.New("unknown TargetType"))
+		// in.AddError(errors.New("unknown TargetType"))
+		*tt = z
 	}
 }