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Merge pull request cdnjs#78 from tc80/brotli_cli
brotli and gzip native/cli approaches
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package compress | ||
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| import ( | ||
| "bytes" | ||
| "compress/gzip" | ||
| "fmt" | ||
| "os/exec" | ||
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| "github.com/cdnjs/tools/util" | ||
| ) | ||
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| // Runs an algorithm with a set of arguments, | ||
| // and returns its stdout as bytes. | ||
| // Note, this function will panic if anything is | ||
| // output to stderr. | ||
| func runAlgorithm(alg string, args ...string) []byte { | ||
| cmd := exec.Command(alg, args...) | ||
| var stdOut, stdErr bytes.Buffer | ||
| cmd.Stdout, cmd.Stderr = &stdOut, &stdErr | ||
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| err := cmd.Run() | ||
| util.Check(err) | ||
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| if stdErr.Len() > 0 { | ||
| panic(fmt.Sprintf("%s failed: %s", alg, stdErr.String())) | ||
| } | ||
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| return stdOut.Bytes() | ||
| } | ||
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| // Brotli11CLI returns a brotli compressed file as bytes | ||
| // at optimal compression (quality 11). | ||
| func Brotli11CLI(filePath string) []byte { | ||
| return runAlgorithm("brotli", "-c", "-q", "11", filePath) | ||
| } | ||
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| // Gzip9Native returns a gzip compressed file as bytes | ||
| // at optimal compression (level 9). | ||
| func Gzip9Native(uncompressed []byte) []byte { | ||
| var b bytes.Buffer | ||
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| w, err := gzip.NewWriterLevel(&b, gzip.BestCompression) | ||
| util.Check(err) | ||
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| _, err = w.Write(uncompressed) | ||
| util.Check(err) | ||
| util.Check(w.Close()) | ||
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| return b.Bytes() | ||
| } |
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