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83 lines
2.1 KiB
83 lines
2.1 KiB
package main
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import (
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"bytes"
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"io/ioutil"
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"log"
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"os"
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"strconv"
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"github.com/codegangsta/cli"
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"github.com/minio-io/minio/pkgs/checksum/crc32c"
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"github.com/minio-io/minio/pkgs/erasure"
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"github.com/minio-io/minio/pkgs/split"
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)
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func encode(c *cli.Context) {
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// check if minio-encode called without parameters
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if len(c.Args()) != 1 {
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cli.ShowCommandHelp(c, "encode")
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return
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}
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config, err := parseInput(c)
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if err != nil {
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log.Fatal(err)
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}
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// get file
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inputFile, err := os.Open(config.input)
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defer inputFile.Close()
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if err != nil {
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log.Fatal(err)
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}
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// read file
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input, err := ioutil.ReadAll(inputFile)
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if err != nil {
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log.Fatal(err)
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}
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// set up encoder
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erasureParameters, _ := erasure.ParseEncoderParams(config.k, config.m, erasure.CAUCHY)
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// Init new encoder
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encoder := erasure.NewEncoder(erasureParameters)
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// encode data
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if config.blockSize == 0 {
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encodedData, length := encoder.Encode(input)
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for key, data := range encodedData {
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crc, err := crc32c.Crc32c(data)
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if err != nil {
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log.Fatal(err)
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}
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crcString := strconv.Itoa(int(crc))
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ioutil.WriteFile(config.output+"."+strconv.Itoa(key)+".cksum", []byte(crcString), 0600)
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ioutil.WriteFile(config.output+"."+strconv.Itoa(key), data, 0600)
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ioutil.WriteFile(config.output+".length", []byte(strconv.Itoa(length)), 0600)
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}
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} else {
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chunkCount := 0
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splitChannel := make(chan split.SplitMessage)
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inputReader := bytes.NewReader(input)
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go split.SplitStream(inputReader, config.blockSize, splitChannel)
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for chunk := range splitChannel {
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if chunk.Err != nil {
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log.Fatal(chunk.Err)
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}
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encodedData, length := encoder.Encode(chunk.Data)
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for key, data := range encodedData {
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crc, err := crc32c.Crc32c(data)
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if err != nil {
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log.Fatal(err)
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}
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crcString := strconv.Itoa(int(crc))
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ioutil.WriteFile(config.output+"."+strconv.Itoa(chunkCount)+"."+strconv.Itoa(key)+".cksum", []byte(crcString), 0600)
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ioutil.WriteFile(config.output+"."+strconv.Itoa(chunkCount)+"."+strconv.Itoa(key), data, 0600)
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}
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ioutil.WriteFile(config.output+"."+strconv.Itoa(chunkCount)+".length", []byte(strconv.Itoa(length)), 0600)
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chunkCount += 1
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}
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}
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}
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