/
platform.go
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/
platform.go
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//此源码被清华学神尹成大魔王专业翻译分析并修改
//尹成QQ77025077
//尹成微信18510341407
//尹成所在QQ群721929980
//尹成邮箱 yinc13@mails.tsinghua.edu.cn
//尹成毕业于清华大学,微软区块链领域全球最有价值专家
//https://mvp.microsoft.com/zh-cn/PublicProfile/4033620
/*
SPDX许可证标识符:Apache-2.0
**/
package java
import (
"archive/tar"
"bytes"
"compress/gzip"
"errors"
"fmt"
"io"
"net/url"
"regexp"
"strings"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/core/chaincode/platforms"
"github.com/hyperledger/fabric/core/chaincode/platforms/ccmetadata"
"github.com/hyperledger/fabric/core/chaincode/platforms/util"
cutil "github.com/hyperledger/fabric/core/container/util"
pb "github.com/hyperledger/fabric/protos/peer"
)
var logger = flogging.MustGetLogger("chaincode.platform.java")
//Java Java代码平台
type Platform struct {
}
//name返回此平台的名称
func (javaPlatform *Platform) Name() string {
return pb.ChaincodeSpec_JAVA.String()
}
//ValueATPATH验证Java链码路径
func (javaPlatform *Platform) ValidatePath(rawPath string) error {
path, err := url.Parse(rawPath)
if err != nil || path == nil {
logger.Errorf("invalid chaincode path %s %v", rawPath, err)
return fmt.Errorf("invalid path: %s", err)
}
return nil
}
func (javaPlatform *Platform) ValidateCodePackage(code []byte) error {
if len(code) == 0 {
//如果未包含代码包,则不验证任何内容
return nil
}
//要有效的文件应与第一个regexp匹配,而与第二个regexp不匹配。
filesToMatch := regexp.MustCompile(`^(/)?src/((src|META-INF)/.*|(build\.gradle|settings\.gradle|pom\.xml))`)
filesToIgnore := regexp.MustCompile(`.*\.class$`)
is := bytes.NewReader(code)
gr, err := gzip.NewReader(is)
if err != nil {
return fmt.Errorf("failure opening codepackage gzip stream: %s", err)
}
tr := tar.NewReader(gr)
for {
header, err := tr.Next()
if err != nil {
if err == io.EOF {
//只有当没有更多的条目需要扫描时,我们才能到达这里。
break
} else {
return err
}
}
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
//检查符合路径的名称
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
if !filesToMatch.MatchString(header.Name) || filesToIgnore.MatchString(header.Name) {
return fmt.Errorf("illegal file detected in payload: \"%s\"", header.Name)
}
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
//检查文件模式是否有意义
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
//可接受标志:
//isreg==0100000
//-rw rw rw-=0666
//
//在此上下文中,任何其他内容都是可疑的,将被拒绝
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
if header.Mode&^0100666 != 0 {
return fmt.Errorf("illegal file mode detected for file %s: %o", header.Name, header.Mode)
}
}
return nil
}
//WryEpkAcAd编写Java链代码包
func (javaPlatform *Platform) GetDeploymentPayload(path string) ([]byte, error) {
logger.Debugf("Packaging java project from path %s", path)
var err error
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
//写下我们的焦油包裹
//——————————————————————————————————————————————————————————————————————————————————————————————————————————————————
payload := bytes.NewBuffer(nil)
gw := gzip.NewWriter(payload)
tw := tar.NewWriter(gw)
folder := path
if folder == "" {
logger.Error("ChaincodeSpec's path cannot be empty")
return nil, errors.New("ChaincodeSpec's path cannot be empty")
}
//修剪尾随斜线(如果存在)
if folder[len(folder)-1] == '/' {
folder = folder[:len(folder)-1]
}
if err = cutil.WriteJavaProjectToPackage(tw, folder); err != nil {
logger.Errorf("Error writing java project to tar package %s", err)
return nil, fmt.Errorf("Error writing Chaincode package contents: %s", err)
}
tw.Close()
gw.Close()
return payload.Bytes(), nil
}
func (javaPlatform *Platform) GenerateDockerfile() (string, error) {
var buf []string
buf = append(buf, "FROM "+cutil.GetDockerfileFromConfig("chaincode.java.runtime"))
buf = append(buf, "ADD binpackage.tar /root/chaincode-java/chaincode")
dockerFileContents := strings.Join(buf, "\n")
return dockerFileContents, nil
}
func (javaPlatform *Platform) GenerateDockerBuild(path string, code []byte, tw *tar.Writer) error {
codepackage := bytes.NewReader(code)
binpackage := bytes.NewBuffer(nil)
buildOptions := util.DockerBuildOptions{
Image: cutil.GetDockerfileFromConfig("chaincode.java.runtime"),
Cmd: "./build.sh",
InputStream: codepackage,
OutputStream: binpackage,
}
logger.Debugf("Executing docker build %v, %v", buildOptions.Image, buildOptions.Cmd)
err := util.DockerBuild(buildOptions)
if err != nil {
logger.Errorf("Can't build java chaincode %v", err)
return err
}
resultBytes := binpackage.Bytes()
return cutil.WriteBytesToPackage("binpackage.tar", resultBytes, tw)
}
//GetMetadataProvider获取给定部署规范的元数据提供程序
func (javaPlatform *Platform) GetMetadataProvider(code []byte) platforms.MetadataProvider {
return &ccmetadata.TargzMetadataProvider{Code: code}
}