Beispiel #1
0
func zipEntries(readers map[string]entryReader, out *zip.Writer) error {
	defer trace.End(trace.Begin(""))
	defer out.Close()
	defer out.Flush()

	for name, r := range readers {
		log.Infof("Collecting log with reader %s(%#v)", name, r)

		e, err := r.open()
		if err != nil {
			log.Warningf("error reading %s(%s): %s\n", name, r, err)
			continue
		}
		sz := e.Size()
		header := &zip.FileHeader{
			Name:   name,
			Method: zip.Deflate,
		}

		header.SetModTime(time.Now())
		header.SetMode(0644)
		if sz > uint32max {
			header.UncompressedSize = uint32max
		} else {
			header.UncompressedSize = uint32(e.Size())
		}

		w, err := out.CreateHeader(header)

		if err != nil {
			log.Errorf("Failed to create Zip writer for %s: %s", header.Name, err)
			continue
		}

		log.Infof("%s has size %d", header.Name, sz)

		// be explicit about the number of bytes to copy as the log files will likely
		// be written to during this exercise
		_, err = io.CopyN(w, e, sz)
		_ = e.Close()
		if err != nil {
			log.Errorf("Failed to write content for %s: %s", header.Name, err)
			continue
		}
		log.Infof("Wrote %d bytes to %s", sz, header.Name)
	}
	return nil
}