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utility.go
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utility.go
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package pilipili
import (
"compress/flate"
"compress/gzip"
"crypto/md5"
"encoding/hex"
"fmt"
"io"
"io/ioutil"
"sort"
"strings"
)
func tostring(v interface{}) string {
return fmt.Sprintf("%v", v)
}
func piliBuildUrl(base string, para map[string]string) string {
res := base
res += "?"
for k, v := range para {
res += k
res += "="
res += v
res += "&"
}
res = strings.TrimRight(res, "&")
return res
}
//https://interface.bilibili.com/v2/playurl?cid=32253539&appkey=84956560bc028eb7&otype=json&type=&quality=0&qn=0&sign=0d1b3ad4dd857c060d28a31a05d13835
func piliBuildQuery(params map[string]string) string {
list := make([]string, 0, len(params))
buffer := make([]string, 0, len(params))
for key := range params {
list = append(list, key)
}
sort.Strings(list)
for _, key := range list {
value := params[key]
buffer = append(buffer, key)
buffer = append(buffer, "=")
buffer = append(buffer, value)
buffer = append(buffer, "&")
}
buffer = buffer[:len(buffer)-1]
return strings.Join(buffer, "")
}
func piliEncodeSign(params map[string]string, secret string) (string, string) {
queryString := piliBuildQuery(params)
return queryString, piliMd5(queryString + secret)
}
func piliMd5(formal string) string {
h := md5.New()
h.Write([]byte(formal))
return hex.EncodeToString(h.Sum(nil))
}
//deflate解压 Content-Encoding: deflate
func piliFlateDecode(in io.ReadCloser) ([]byte, error) {
reader := flate.NewReader(in)
defer reader.Close()
return ioutil.ReadAll(reader)
}
//gzip解压 Content-Encoding: Gzip
func piliGzipDecode(in io.ReadCloser) ([]byte, error) {
reader, err := gzip.NewReader(in)
if err != nil {
return nil, err
}
defer reader.Close()
return ioutil.ReadAll(reader)
}
func piliByte4ToUint32(data []byte, big_endian bool) uint32 {
var i uint32
if big_endian {
i = uint32(uint32(data[3]) + uint32(data[2])<<8 + uint32(data[1])<<16 + uint32(data[0])<<24)
} else {
i = uint32(uint32(data[0]) + uint32(data[1])<<8 + uint32(data[2])<<16 + uint32(data[3])<<24)
}
return i
}
func piliByte3ToUint32(data []byte, big_endian bool) uint32 {
var i uint32
if big_endian {
i = uint32(uint32(data[2]) + uint32(data[1])<<8 + uint32(data[0])<<16)
} else {
i = uint32(uint32(data[0]) + uint32(data[1])<<8 + uint32(data[2])<<16)
}
return i
}