658 lines
23 KiB
Go
658 lines
23 KiB
Go
/*
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* Copyright 2022 CloudWeGo Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package generator
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"path/filepath"
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"strings"
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"text/template"
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"golib.gaore.com/xuy2/gr_hz/util"
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"golib.gaore.com/xuy2/gr_hz/util/logs"
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)
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type FilePathRenderInfo struct {
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MasterIDLName string // master IDL name
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GenPackage string // master IDL generate code package
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HandlerDir string // handler generate dir
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ModelDir string // model generate dir
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RouterDir string // router generate dir
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ProjectDir string // projectDir
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GoModule string // go module
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ServiceName string // service name, changed as services are traversed
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MethodName string // method name, changed as methods are traversed
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HandlerGenPath string // "api.gen_path" value
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}
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type IDLPackageRenderInfo struct {
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FilePathRenderInfo
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ServiceInfos *HttpPackage
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}
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type CustomizedFileForMethod struct {
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*HttpMethod
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FilePath string
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FilePackage string
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ServiceInfo *Service // service info for this method
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IDLPackageInfo *IDLPackageRenderInfo // IDL info for this service
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}
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type CustomizedFileForService struct {
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*Service
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FilePath string
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FilePackage string
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IDLPackageInfo *IDLPackageRenderInfo // IDL info for this service
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}
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type CustomizedFileForIDL struct {
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*IDLPackageRenderInfo
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FilePath string
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FilePackage string
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}
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// todo: 1. how to import other file, if the other file name is a template
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// genCustomizedFile generate customized file template
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func (pkgGen *HttpPackageGenerator) genCustomizedFile(pkg *HttpPackage) error {
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filePathRenderInfo := FilePathRenderInfo{
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MasterIDLName: pkg.IdlName,
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GenPackage: pkg.Package,
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HandlerDir: pkgGen.HandlerDir,
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ModelDir: pkgGen.ModelDir,
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RouterDir: pkgGen.RouterDir,
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ProjectDir: pkgGen.OutputDir,
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GoModule: pkgGen.ProjPackage,
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// methodName & serviceName will change as traverse
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}
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idlPackageRenderInfo := IDLPackageRenderInfo{
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FilePathRenderInfo: filePathRenderInfo,
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ServiceInfos: pkg,
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}
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for _, tplInfo := range pkgGen.tplsInfo {
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// the default template has been automatically generated by the tool, so skip
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if tplInfo.Default {
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continue
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}
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// loop generate file
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if tplInfo.LoopService || tplInfo.LoopMethod {
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loopMethod := tplInfo.LoopMethod
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loopService := tplInfo.LoopService
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if loopService && !loopMethod { // only loop service
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for _, service := range idlPackageRenderInfo.ServiceInfos.Services {
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filePathRenderInfo.ServiceName = service.Name
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err := pkgGen.genLoopService(tplInfo, filePathRenderInfo, service, &idlPackageRenderInfo)
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if err != nil {
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return err
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}
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}
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} else { // loop service & method, because if loop method, the service must be looped
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for _, service := range idlPackageRenderInfo.ServiceInfos.Services {
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for _, method := range service.Methods {
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filePathRenderInfo.ServiceName = service.Name
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filePathRenderInfo.MethodName = method.Name
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filePathRenderInfo.HandlerGenPath = method.OutputDir
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err := pkgGen.genLoopMethod(tplInfo, filePathRenderInfo, method, service, &idlPackageRenderInfo)
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if err != nil {
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return err
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}
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}
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}
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}
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} else { // generate customized file single
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err := pkgGen.genSingleCustomizedFile(tplInfo, filePathRenderInfo, idlPackageRenderInfo)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// renderFilePath used to render file path template to get real file path
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func renderFilePath(tplInfo *Template, filePathRenderInfo FilePathRenderInfo) (string, error) {
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tpl, err := template.New(tplInfo.Path).Funcs(funcMap).Parse(tplInfo.Path)
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if err != nil {
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return "", fmt.Errorf("parse file path template(%s) failed, err: %v", tplInfo.Path, err)
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}
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filePath := bytes.NewBuffer(nil)
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err = tpl.Execute(filePath, filePathRenderInfo)
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if err != nil {
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return "", fmt.Errorf("render file path template(%s) failed, err: %v", tplInfo.Path, err)
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}
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return filePath.String(), nil
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}
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func renderInsertKey(tplInfo *Template, data interface{}) (string, error) {
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tpl, err := template.New(tplInfo.UpdateBehavior.InsertKey).Funcs(funcMap).Parse(tplInfo.UpdateBehavior.InsertKey)
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if err != nil {
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return "", fmt.Errorf("parse insert key template(%s) failed, err: %v", tplInfo.UpdateBehavior.InsertKey, err)
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}
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insertKey := bytes.NewBuffer(nil)
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err = tpl.Execute(insertKey, data)
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if err != nil {
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return "", fmt.Errorf("render insert key template(%s) failed, err: %v", tplInfo.UpdateBehavior.InsertKey, err)
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}
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return insertKey.String(), nil
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}
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// renderImportTpl will render import template
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// it will return the []string, like blow:
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// ["import", alias "import", import]
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// other format will be error
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func renderImportTpl(tplInfo *Template, data interface{}) ([]string, error) {
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var importList []string
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for _, impt := range tplInfo.UpdateBehavior.ImportTpl {
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tpl, err := template.New(impt).Funcs(funcMap).Parse(impt)
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if err != nil {
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return nil, fmt.Errorf("parse import template(%s) failed, err: %v", impt, err)
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}
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imptContent := bytes.NewBuffer(nil)
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err = tpl.Execute(imptContent, data)
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if err != nil {
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return nil, fmt.Errorf("render import template(%s) failed, err: %v", impt, err)
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}
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importList = append(importList, imptContent.String())
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}
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var ret []string
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for _, impts := range importList {
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// 'import render result' may have multiple imports
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if strings.Contains(impts, "\n") {
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for _, impt := range strings.Split(impts, "\n") {
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ret = append(ret, impt)
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}
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} else {
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ret = append(ret, impts)
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}
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}
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return ret, nil
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}
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// renderAppendContent used to render append content for 'update' command
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func renderAppendContent(tplInfo *Template, renderInfo interface{}) (string, error) {
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tpl, err := template.New(tplInfo.Path).Funcs(funcMap).Parse(tplInfo.UpdateBehavior.AppendTpl)
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if err != nil {
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return "", fmt.Errorf("parse append content template(%s) failed, err: %v", tplInfo.Path, err)
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}
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appendContent := bytes.NewBuffer(nil)
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err = tpl.Execute(appendContent, renderInfo)
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if err != nil {
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return "", fmt.Errorf("render append content template(%s) failed, err: %v", tplInfo.Path, err)
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}
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return appendContent.String(), nil
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}
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// appendUpdateFile used to append content to file for 'update' command
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func appendUpdateFile(tplInfo *Template, renderInfo interface{}, fileContent []byte) ([]byte, error) {
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// render insert content
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appendContent, err := renderAppendContent(tplInfo, renderInfo)
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if err != nil {
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return []byte(""), err
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}
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buf := bytes.NewBuffer(nil)
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_, err = buf.Write(fileContent)
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if err != nil {
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return []byte(""), fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
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}
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// "\r\n" && "\n" has the same suffix
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if !bytes.HasSuffix(buf.Bytes(), []byte("\n")) {
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_, err = buf.WriteString("\n")
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if err != nil {
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return []byte(""), fmt.Errorf("write file(%s) line break failed, err: %v", tplInfo.Path, err)
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}
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}
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_, err = buf.WriteString(appendContent)
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if err != nil {
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return []byte(""), fmt.Errorf("append file(%s) failed, err: %v", tplInfo.Path, err)
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}
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return buf.Bytes(), nil
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}
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func getInsertImportContent(tplInfo *Template, renderInfo interface{}, fileContent []byte) ([][2]string, error) {
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importContent, err := renderImportTpl(tplInfo, renderInfo)
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if err != nil {
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return nil, err
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}
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var imptSlice [][2]string
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for _, impt := range importContent {
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// import has to format
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// 1. alias "import"
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// 2. "import"
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// 3. import (can not contain '"')
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impt = strings.TrimSpace(impt)
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if !strings.Contains(impt, "\"") { // 3. import (can not contain '"')
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if bytes.Contains(fileContent, []byte(impt)) {
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continue
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}
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imptSlice = append(imptSlice, [2]string{"", impt})
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} else {
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if !strings.HasSuffix(impt, "\"") {
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return nil, fmt.Errorf("import can not has suffix \"\"\", for file: %s", tplInfo.Path)
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}
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if strings.HasPrefix(impt, "\"") { // 2. "import"
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if bytes.Contains(fileContent, []byte(impt[1:len(impt)-1])) {
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continue
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}
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imptSlice = append(imptSlice, [2]string{"", impt[1 : len(impt)-1]})
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} else { // 3. alias "import"
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idx := strings.Index(impt, "\n")
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if idx == -1 {
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return nil, fmt.Errorf("error import format for file: %s", tplInfo.Path)
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}
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if bytes.Contains(fileContent, []byte(impt[idx+1:len(impt)-1])) {
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continue
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}
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imptSlice = append(imptSlice, [2]string{impt[:idx], impt[idx+1 : len(impt)-1]})
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}
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}
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}
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return imptSlice, nil
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}
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// genLoopService used to generate files by 'service'
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func (pkgGen *HttpPackageGenerator) genLoopService(tplInfo *Template, filePathRenderInfo FilePathRenderInfo, service *Service, idlPackageRenderInfo *IDLPackageRenderInfo) error {
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filePath, err := renderFilePath(tplInfo, filePathRenderInfo)
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if err != nil {
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return err
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}
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// determine if a custom file exists
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exist, err := util.PathExist(filePath)
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if err != nil {
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return fmt.Errorf("judge file(%s) exists failed, err: %v", filePath, err)
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}
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if !exist { // create file
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data := CustomizedFileForService{
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Service: service,
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FilePath: filePath,
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FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
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IDLPackageInfo: idlPackageRenderInfo,
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}
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err = pkgGen.TemplateGenerator.Generate(data, tplInfo.Path, filePath, false)
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if err != nil {
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return err
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}
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} else {
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switch tplInfo.UpdateBehavior.Type {
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case Skip:
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// do nothing
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logs.Infof("do not update file '%s', because the update behavior is 'Unchanged'", filePath)
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case Cover:
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// re-generate
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logs.Infof("re-generate file '%s', because the update behavior is 'Regenerate'", filePath)
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data := CustomizedFileForService{
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Service: service,
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FilePath: filePath,
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FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
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IDLPackageInfo: idlPackageRenderInfo,
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}
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err := pkgGen.TemplateGenerator.Generate(data, tplInfo.Path, filePath, false)
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if err != nil {
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return err
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}
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case Append: // todo: append logic need to be optimized for method
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fileContent, err := ioutil.ReadFile(filePath)
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if err != nil {
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return err
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}
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var appendContent []byte
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// get insert content
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if tplInfo.UpdateBehavior.AppendKey == "method" {
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for _, method := range service.Methods {
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data := CustomizedFileForMethod{
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HttpMethod: method,
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FilePath: filePath,
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FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
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ServiceInfo: service,
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IDLPackageInfo: idlPackageRenderInfo,
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}
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insertKey, err := renderInsertKey(tplInfo, data)
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if err != nil {
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return err
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}
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if bytes.Contains(fileContent, []byte(insertKey)) {
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continue
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}
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imptSlice, err := getInsertImportContent(tplInfo, data, fileContent)
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if err != nil {
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return err
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}
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// insert new import to the fileContent
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for _, impt := range imptSlice {
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if bytes.Contains(fileContent, []byte(impt[1])) {
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continue
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}
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fileContent, err = util.AddImportForContent(fileContent, impt[0], impt[1])
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// insert import error do not influence the generated file
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if err != nil {
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logs.Warnf("can not add import(%s) for file(%s), err: %v\n", impt[1], filePath, err)
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}
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}
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appendContent, err = appendUpdateFile(tplInfo, data, appendContent)
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if err != nil {
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return err
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}
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}
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if len(tplInfo.UpdateBehavior.AppendLocation) == 0 { // default, append to end of file
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buf := bytes.NewBuffer(nil)
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_, err = buf.Write(fileContent)
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if err != nil {
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return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
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}
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_, err = buf.Write(appendContent)
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if err != nil {
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return fmt.Errorf("append file(%s) failed, err: %v", tplInfo.Path, err)
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}
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logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'method'", filePath)
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pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
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} else { // 'append location', append new content after 'append location'
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part := bytes.Split(fileContent, []byte(tplInfo.UpdateBehavior.AppendLocation))
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if len(part) == 0 {
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return fmt.Errorf("can not find append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
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}
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if len(part) != 2 {
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return fmt.Errorf("do not support multiple append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
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}
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buf := bytes.NewBuffer(nil)
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err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
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if err != nil {
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return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
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}
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logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'method'", filePath)
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pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
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}
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} else {
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logs.Warnf("Loop 'service' field for '%s' only append content by appendKey for 'method', so cannot append content", filePath)
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}
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default:
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// do nothing
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logs.Warnf("unknown update behavior, do nothing")
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}
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}
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return nil
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}
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// genLoopMethod used to generate files by 'method'
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func (pkgGen *HttpPackageGenerator) genLoopMethod(tplInfo *Template, filePathRenderInfo FilePathRenderInfo, method *HttpMethod, service *Service, idlPackageRenderInfo *IDLPackageRenderInfo) error {
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filePath, err := renderFilePath(tplInfo, filePathRenderInfo)
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if err != nil {
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return err
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}
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// determine if a custom file exists
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exist, err := util.PathExist(filePath)
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if err != nil {
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return fmt.Errorf("judge file(%s) exists failed, err: %v", filePath, err)
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}
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if !exist { // create file
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data := CustomizedFileForMethod{
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HttpMethod: method,
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FilePath: filePath,
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FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
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ServiceInfo: service,
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IDLPackageInfo: idlPackageRenderInfo,
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}
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err := pkgGen.TemplateGenerator.Generate(data, tplInfo.Path, filePath, false)
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if err != nil {
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return err
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}
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} else {
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switch tplInfo.UpdateBehavior.Type {
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case Skip:
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// do nothing
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logs.Infof("do not update file '%s', because the update behavior is 'Unchanged'", filePath)
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case Cover:
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// re-generate
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logs.Infof("re-generate file '%s', because the update behavior is 'Regenerate'", filePath)
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data := CustomizedFileForMethod{
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HttpMethod: method,
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FilePath: filePath,
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FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
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ServiceInfo: service,
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IDLPackageInfo: idlPackageRenderInfo,
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}
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err := pkgGen.TemplateGenerator.Generate(data, tplInfo.Path, filePath, false)
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if err != nil {
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return err
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}
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case Append:
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// for loop method, no need to append something; so do nothing
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logs.Warnf("do not append content for file '%s', because the update behavior is 'Append' and loop 'method' have no need to append content", filePath)
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default:
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// do nothing
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logs.Warnf("unknown update behavior, do nothing")
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}
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}
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return nil
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}
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// genSingleCustomizedFile used to generate file by 'master IDL'
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func (pkgGen *HttpPackageGenerator) genSingleCustomizedFile(tplInfo *Template, filePathRenderInfo FilePathRenderInfo, idlPackageRenderInfo IDLPackageRenderInfo) error {
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// generate file single
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filePath, err := renderFilePath(tplInfo, filePathRenderInfo)
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if err != nil {
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return err
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}
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// determine if a custom file exists
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exist, err := util.PathExist(filePath)
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if err != nil {
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return fmt.Errorf("judge file(%s) exists failed, err: %v", filePath, err)
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}
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if !exist { // create file
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data := CustomizedFileForIDL{
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IDLPackageRenderInfo: &idlPackageRenderInfo,
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FilePath: filePath,
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FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
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}
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err := pkgGen.TemplateGenerator.Generate(data, tplInfo.Path, filePath, false)
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if err != nil {
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return err
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}
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} else {
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switch tplInfo.UpdateBehavior.Type {
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case Skip:
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// do nothing
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logs.Infof("do not update file '%s', because the update behavior is 'Unchanged'", filePath)
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case Cover:
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// re-generate
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logs.Infof("re-generate file '%s', because the update behavior is 'Regenerate'", filePath)
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data := CustomizedFileForIDL{
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IDLPackageRenderInfo: &idlPackageRenderInfo,
|
|
FilePath: filePath,
|
|
FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
|
|
}
|
|
err := pkgGen.TemplateGenerator.Generate(data, tplInfo.Path, filePath, false)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case Append: // todo: append logic need to be optimized for single file
|
|
fileContent, err := ioutil.ReadFile(filePath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if tplInfo.UpdateBehavior.AppendKey == "method" {
|
|
var appendContent []byte
|
|
for _, service := range idlPackageRenderInfo.ServiceInfos.Services {
|
|
for _, method := range service.Methods {
|
|
data := CustomizedFileForMethod{
|
|
HttpMethod: method,
|
|
FilePath: filePath,
|
|
FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
|
|
ServiceInfo: service,
|
|
IDLPackageInfo: &idlPackageRenderInfo,
|
|
}
|
|
insertKey, err := renderInsertKey(tplInfo, data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if bytes.Contains(fileContent, []byte(insertKey)) {
|
|
continue
|
|
}
|
|
imptSlice, err := getInsertImportContent(tplInfo, data, fileContent)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, impt := range imptSlice {
|
|
if bytes.Contains(fileContent, []byte(impt[1])) {
|
|
continue
|
|
}
|
|
fileContent, err = util.AddImportForContent(fileContent, impt[0], impt[1])
|
|
if err != nil {
|
|
logs.Warnf("can not add import(%s) for file(%s)\n", impt[1], filePath)
|
|
}
|
|
}
|
|
|
|
appendContent, err = appendUpdateFile(tplInfo, data, appendContent)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
if len(tplInfo.UpdateBehavior.AppendLocation) == 0 { // default, append to end of file
|
|
buf := bytes.NewBuffer(nil)
|
|
_, err = buf.Write(fileContent)
|
|
if err != nil {
|
|
return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
|
|
}
|
|
_, err = buf.Write(appendContent)
|
|
if err != nil {
|
|
return fmt.Errorf("append file(%s) failed, err: %v", tplInfo.Path, err)
|
|
}
|
|
logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'method'", filePath)
|
|
pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
|
|
} else { // 'append location', append new content after 'append location'
|
|
part := bytes.Split(fileContent, []byte(tplInfo.UpdateBehavior.AppendLocation))
|
|
if len(part) == 0 {
|
|
return fmt.Errorf("can not find append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
|
|
}
|
|
if len(part) != 2 {
|
|
return fmt.Errorf("do not support multiple append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
|
|
}
|
|
buf := bytes.NewBuffer(nil)
|
|
err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
|
|
if err != nil {
|
|
return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
|
|
}
|
|
logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'method'", filePath)
|
|
pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
|
|
}
|
|
} else if tplInfo.UpdateBehavior.AppendKey == "service" {
|
|
var appendContent []byte
|
|
for _, service := range idlPackageRenderInfo.ServiceInfos.Services {
|
|
data := CustomizedFileForService{
|
|
Service: service,
|
|
FilePath: filePath,
|
|
FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
|
|
IDLPackageInfo: &idlPackageRenderInfo,
|
|
}
|
|
insertKey, err := renderInsertKey(tplInfo, data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if bytes.Contains(fileContent, []byte(insertKey)) {
|
|
continue
|
|
}
|
|
imptSlice, err := getInsertImportContent(tplInfo, data, fileContent)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, impt := range imptSlice {
|
|
if bytes.Contains(fileContent, []byte(impt[1])) {
|
|
continue
|
|
}
|
|
fileContent, err = util.AddImportForContent(fileContent, impt[0], impt[1])
|
|
if err != nil {
|
|
logs.Warnf("can not add import(%s) for file(%s)\n", impt[1], filePath)
|
|
}
|
|
}
|
|
appendContent, err = appendUpdateFile(tplInfo, data, appendContent)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if len(tplInfo.UpdateBehavior.AppendLocation) == 0 { // default, append to end of file
|
|
buf := bytes.NewBuffer(nil)
|
|
_, err = buf.Write(fileContent)
|
|
if err != nil {
|
|
return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
|
|
}
|
|
_, err = buf.Write(appendContent)
|
|
if err != nil {
|
|
return fmt.Errorf("append file(%s) failed, err: %v", tplInfo.Path, err)
|
|
}
|
|
logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'service'", filePath)
|
|
pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
|
|
} else { // 'append location', append new content after 'append location'
|
|
part := bytes.Split(fileContent, []byte(tplInfo.UpdateBehavior.AppendLocation))
|
|
if len(part) == 0 {
|
|
return fmt.Errorf("can not find append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
|
|
}
|
|
if len(part) != 2 {
|
|
return fmt.Errorf("do not support multiple append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
|
|
}
|
|
buf := bytes.NewBuffer(nil)
|
|
err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
|
|
if err != nil {
|
|
return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
|
|
}
|
|
logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'service'", filePath)
|
|
pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
|
|
}
|
|
} else { // add append content to the file directly
|
|
data := CustomizedFileForIDL{
|
|
IDLPackageRenderInfo: &idlPackageRenderInfo,
|
|
FilePath: filePath,
|
|
FilePackage: util.SplitPackage(filepath.Dir(filePath), ""),
|
|
}
|
|
file, err := appendUpdateFile(tplInfo, data, fileContent)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pkgGen.files = append(pkgGen.files, File{filePath, string(file), false, ""})
|
|
}
|
|
default:
|
|
// do nothing
|
|
logs.Warnf("unknown update behavior, do nothing")
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func writeBytes(buf *bytes.Buffer, bytes ...[]byte) error {
|
|
for _, b := range bytes {
|
|
_, err := buf.Write(b)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|