125 lines
2.9 KiB
Go
125 lines
2.9 KiB
Go
package main
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import (
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"errors"
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"fmt"
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"os"
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"github.com/spf13/cobra"
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"src.lwithers.me.uk/go/htpack/packed"
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)
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var inspectCmd = &cobra.Command{
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Use: "inspect",
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Short: "View contents of an htpack file",
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RunE: func(cmd *cobra.Command, args []string) error {
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if len(args) == 0 {
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return errors.New("must specify one or more files")
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}
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var exitCode int
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for _, filename := range args {
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if err := Inspect(filename); err != nil {
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fmt.Fprintf(os.Stderr, "%s: %v\n",
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filename, err)
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exitCode = 1
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}
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}
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os.Exit(exitCode)
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return nil
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},
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}
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// Inspect a packfile.
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// TODO: verify etag; verify integrity of compressed data.
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func Inspect(filename string) error {
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f, err := os.Open(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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hdr, dir, err := packed.Load(f)
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if hdr != nil {
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fmt.Printf("Header: %#v\n", hdr)
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}
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if dir != nil {
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fmt.Printf("%d files:\n", len(dir.Files))
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for path, info := range dir.Files {
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fmt.Printf(" • %s\n"+
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" · Etag: %s\n"+
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" · Content type: %s\n"+
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" · Uncompressed: %s (offset %d)\n",
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path, info.Etag, info.ContentType,
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printSize(info.Uncompressed.Length),
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info.Uncompressed.Offset)
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if info.Gzip != nil {
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fmt.Printf(" · Gzipped: %s (offset %d)\n",
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printSize(info.Gzip.Length), info.Gzip.Offset)
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}
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if info.Brotli != nil {
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fmt.Printf(" · Brotli: %s (offset %d)\n",
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printSize(info.Brotli.Length), info.Brotli.Offset)
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}
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}
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inspectSummary(dir)
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}
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return err
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}
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func inspectSummary(dir *packed.Directory) {
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var (
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n, ngzip, nbrotli int
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s, sgzip, sbrotli uint64
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)
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for _, f := range dir.Files {
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n++
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s += f.Uncompressed.Length
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if f.Gzip != nil {
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ngzip++
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sgzip += f.Gzip.Length
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}
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if f.Brotli != nil {
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nbrotli++
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sbrotli += f.Brotli.Length
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}
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}
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fmt.Printf("Uncompressed:\n\tFiles: %d\n\tSize: %s\n",
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n, printSize(s))
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if ngzip > 0 {
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fmt.Printf("gzip compressed:\n\tFiles: %d (%.1f%% of total)\n"+
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"\tSize: %s\n\tRatio: %.1f%%\n",
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ngzip, 100*float64(ngzip)/float64(n),
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printSize(sgzip), 100*float64(sgzip)/float64(s))
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}
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if nbrotli > 0 {
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fmt.Printf("brotli compressed:\n\tFiles: %d (%.1f%% of total)\n"+
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"\tSize: %s\n\tRatio: %.1f%%\n",
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nbrotli, 100*float64(nbrotli)/float64(n),
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printSize(sbrotli), 100*float64(sbrotli)/float64(s))
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}
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}
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func printSize(size uint64) string {
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switch {
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case size < 1<<10:
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return fmt.Sprintf("%d bytes", size)
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case size < 1<<15:
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return fmt.Sprintf("%.2f KiB", float64(size)/(1<<10))
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case size < 1<<20:
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return fmt.Sprintf("%.1f KiB", float64(size)/(1<<10))
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case size < 1<<25:
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return fmt.Sprintf("%.2f MiB", float64(size)/(1<<20))
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case size < 1<<30:
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return fmt.Sprintf("%.1f MiB", float64(size)/(1<<20))
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case size < 1<<35:
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return fmt.Sprintf("%.2f GiB", float64(size)/(1<<30))
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default:
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return fmt.Sprintf("%.1f GiB", float64(size)/(1<<30))
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}
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}
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