80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
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package main
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import (
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"bufio"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"io"
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"net/http"
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"os"
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"path"
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"strings"
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)
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type versionInfo struct {
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Version string
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ChecksumUrl string
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AssetUrl string
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AssetSize int64
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}
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func (v versionInfo) getAssetPath(prefix string) string {
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return path.Join(buildTempDir, prefix+v.Version+"_"+assetFilename)
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}
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func (v versionInfo) checkAssetExist() bool {
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_, err := os.Stat(v.getAssetPath(""))
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return !os.IsNotExist(err)
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}
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func (v versionInfo) downloadAsset() (err error) {
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file, err := os.OpenFile(v.getAssetPath(""), os.O_WRONLY|os.O_CREATE, 0644)
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if err != nil {
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return
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}
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defer file.Close()
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resp, err := http.Get(v.AssetUrl)
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if err != nil {
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return
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}
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defer resp.Body.Close()
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_, err = io.Copy(file, resp.Body)
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return err
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}
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func (v versionInfo) downloadChecksum() (checksum string, err error) {
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resp, err := http.Get(v.ChecksumUrl)
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if err != nil {
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return
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}
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defer resp.Body.Close()
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r := bufio.NewReader(resp.Body)
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var line []byte
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for err == nil {
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line, _, err = r.ReadLine()
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lineStr := string(line)
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if strings.Contains(lineStr, assetFilename) {
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checksum = strings.ToLower(strings.TrimSpace(strings.Split(lineStr, " ")[0]))
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return
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}
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}
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return "", fmt.Errorf("checksum for %s not found", assetFilename)
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}
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func (v versionInfo) calcAssetChecksum() (checksum string, err error) {
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file, err := os.Open(v.getAssetPath(""))
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if err != nil {
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return
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}
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defer file.Close()
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sha := sha256.New()
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_, err = io.Copy(sha, file)
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if err != nil {
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return
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}
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checksum = hex.EncodeToString(sha.Sum(nil))
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return
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}
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