用golang解压缩gzip字符串

Question

I have a string which contains a gzip compressed string, therefore there's no file headers, standard compress/gzip library throws error gzip: invalid header

How can I decompress a gzip compressed string in go?

This is what I'm trying

nbody := "eNorTk0uSi0BAAjRAoc="
rdata := strings.NewReader(nbody)
r,err := gzip.NewReader(rdata)
log.Println(r)
if err != nil {
    log.Fatal(err)
}
s, _ := ioutil.ReadAll(r)
fmt.Println(string(s))

Answer 1

... I have a string which contains a gzip compressed string

nbody := "eNorTk0uSi0BAAjRAoc="

This is not a "gzip compressed string". This looks like some base64 encoded data which need to be decoded first. After decoding it is not gzip either but zlib - which is basically the same as gzip (content compressed with deflate algorithm) but with a different file header. Therefore trying to decode it with gzip will not work.

The following will therefore take your original string, decode it from base64 and decompress it using zlib (not gzip):

package main

import (
        "bytes"
        "compress/zlib"
        "encoding/base64"
        "fmt"
        "io/ioutil"
)

func main() {
        b64z := "eNorTk0uSi0BAAjRAoc="
        z, _ := base64.StdEncoding.DecodeString(b64z)
        r, _ := zlib.NewReader(bytes.NewReader(z))
        result, _ := ioutil.ReadAll(r)
        fmt.Println(string(result))  // results in "secret"
}