Golang aptly.Downloader类代码示例

// DownloadTempWithChecksum is a DownloadTemp with checksum verification
//
// Temporary file would be already removed, so no need to cleanup
func DownloadTempWithChecksum(downloader aptly.Downloader, url string, expected utils.ChecksumInfo, ignoreMismatch bool) (*os.File, error) {
	tempdir, err := ioutil.TempDir(os.TempDir(), "aptly")
	if err != nil {
		return nil, err
	}
	defer os.RemoveAll(tempdir)

	tempfile := filepath.Join(tempdir, "buffer")

	if expected.Size != -1 && downloader.GetProgress() != nil {
		downloader.GetProgress().InitBar(expected.Size, true)
		defer downloader.GetProgress().ShutdownBar()
	}

	ch := make(chan error, 1)
	downloader.DownloadWithChecksum(url, tempfile, ch, expected, ignoreMismatch)

	err = <-ch

	if err != nil {
		return nil, err
	}

	file, err := os.Open(tempfile)
	if err != nil {
		return nil, err
	}

	return file, nil
}

// Download downloads all repo files
func (repo *RemoteRepo) Download(progress aptly.Progress, d aptly.Downloader, packageCollection *PackageCollection, packagePool aptly.PackagePool, ignoreMismatch bool) error {
	list := NewPackageList()

	progress.Printf("Downloading & parsing package files...\n")

	// Download and parse all Packages & Source files
	packagesURLs := [][]string{}

	if repo.IsFlat() {
		packagesURLs = append(packagesURLs, []string{repo.FlatBinaryURL().String(), "binary"})
		if repo.DownloadSources {
			packagesURLs = append(packagesURLs, []string{repo.FlatSourcesURL().String(), "source"})
		}
	} else {
		for _, component := range repo.Components {
			for _, architecture := range repo.Architectures {
				packagesURLs = append(packagesURLs, []string{repo.BinaryURL(component, architecture).String(), "binary"})
			}
			if repo.DownloadSources {
				packagesURLs = append(packagesURLs, []string{repo.SourcesURL(component).String(), "source"})
			}
		}
	}

	for _, info := range packagesURLs {
		url, kind := info[0], info[1]
		packagesReader, packagesFile, err := http.DownloadTryCompression(d, url, repo.ReleaseFiles, ignoreMismatch)
		if err != nil {
			return err
		}
		defer packagesFile.Close()

		sreader := NewControlFileReader(packagesReader)

		for {
			stanza, err := sreader.ReadStanza()
			if err != nil {
				return err
			}
			if stanza == nil {
				break
			}

			var p *Package

			if kind == "binary" {
				p = NewPackageFromControlFile(stanza)
			} else if kind == "source" {
				p, err = NewSourcePackageFromControlFile(stanza)
				if err != nil {
					return err
				}
			}
			list.Add(p)
		}
	}

	progress.Printf("Saving packages to database...\n")

	progress.InitBar(int64(list.Len()), false)

	packageCollection.db.StartBatch()
	count := 0

	// Save package meta information to DB
	err := list.ForEach(func(p *Package) error {
		progress.AddBar(1)
		count++
		if count > 1000 {
			count = 0
			err := packageCollection.db.FinishBatch()
			if err != nil {
				return err
			}
			packageCollection.db.StartBatch()
		}
		return packageCollection.Update(p)
	})
	if err != nil {
		return fmt.Errorf("unable to save packages to db: %s", err)
	}

	err = packageCollection.db.FinishBatch()
	if err != nil {
		return fmt.Errorf("unable to save packages to db: %s", err)
	}

	progress.ShutdownBar()

	progress.Printf("Building download queue...\n")

	// Build download queue
	queued := make(map[string]PackageDownloadTask, list.Len())
	count = 0
	downloadSize := int64(0)

	err = list.ForEach(func(p *Package) error {
		list, err := p.DownloadList(packagePool)
		if err != nil {
//.........这里部分代码省略.........

// Download downloads all repo files
func (repo *RemoteRepo) Download(progress aptly.Progress, d aptly.Downloader, collectionFactory *CollectionFactory,
	packagePool aptly.PackagePool, ignoreMismatch bool, dependencyOptions int, filterQuery PackageQuery) error {
	list := NewPackageList()

	progress.Printf("Downloading & parsing package files...\n")

	// Download and parse all Packages & Source files
	packagesURLs := [][]string{}

	if repo.IsFlat() {
		packagesURLs = append(packagesURLs, []string{repo.FlatBinaryURL().String(), "binary"})
		if repo.DownloadSources {
			packagesURLs = append(packagesURLs, []string{repo.FlatSourcesURL().String(), "source"})
		}
	} else {
		for _, component := range repo.Components {
			for _, architecture := range repo.Architectures {
				packagesURLs = append(packagesURLs, []string{repo.BinaryURL(component, architecture).String(), "binary"})
			}
			if repo.DownloadSources {
				packagesURLs = append(packagesURLs, []string{repo.SourcesURL(component).String(), "source"})
			}
		}
	}

	for _, info := range packagesURLs {
		url, kind := info[0], info[1]
		packagesReader, packagesFile, err := http.DownloadTryCompression(d, url, repo.ReleaseFiles, ignoreMismatch)
		if err != nil {
			return err
		}
		defer packagesFile.Close()

		stat, _ := packagesFile.Stat()
		progress.InitBar(stat.Size(), true)

		sreader := NewControlFileReader(packagesReader)

		for {
			stanza, err := sreader.ReadStanza()
			if err != nil {
				return err
			}
			if stanza == nil {
				break
			}

			off, _ := packagesFile.Seek(0, 1)
			progress.SetBar(int(off))

			var p *Package

			if kind == "binary" {
				p = NewPackageFromControlFile(stanza)
			} else if kind == "source" {
				p, err = NewSourcePackageFromControlFile(stanza)
				if err != nil {
					return err
				}
			}
			err = list.Add(p)
			if err != nil {
				return err
			}

			err = collectionFactory.PackageCollection().Update(p)
			if err != nil {
				return err
			}
		}

		progress.ShutdownBar()
	}

	var err error

	if repo.Filter != "" {
		progress.Printf("Applying filter...\n")

		list.PrepareIndex()

		emptyList := NewPackageList()
		emptyList.PrepareIndex()

		origPackages := list.Len()
		list, err = list.Filter([]PackageQuery{filterQuery}, repo.FilterWithDeps, emptyList, dependencyOptions, repo.Architectures)
		if err != nil {
			return err
		}

		progress.Printf("Packages filtered: %d -> %d.\n", origPackages, list.Len())
	}

	progress.Printf("Building download queue...\n")

	// Build download queue
	queued := make(map[string]PackageDownloadTask, list.Len())
	count := 0
	downloadSize := int64(0)
//.........这里部分代码省略.........