z0z0r4
GitHub
commit
e3121ecd5a
@ -380,178 +380,185 @@ bar=514&baz=1919810&foo=114&wts=1684805578&w_rid=bb97e15f28edf445a0e4420d36f0157
|
||||
|
||||
### Golang
|
||||
|
||||
需要 `github.com/tidwall/gjson` 作为依赖
|
||||
无第三方库
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"crypto/md5"
|
||||
"encoding/hex"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"net/http"
|
||||
"net/url"
|
||||
"sort"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/tidwall/gjson"
|
||||
)
|
||||
|
||||
var (
|
||||
mixinKeyEncTab = []int{
|
||||
46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35, 27, 43, 5, 49,
|
||||
33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13, 37, 48, 7, 16, 24, 55, 40,
|
||||
61, 26, 17, 0, 1, 60, 51, 30, 4, 22, 25, 54, 21, 56, 59, 6, 63, 57, 62, 11,
|
||||
36, 20, 34, 44, 52,
|
||||
}
|
||||
cache sync.Map
|
||||
lastUpdateTime time.Time
|
||||
)
|
||||
|
||||
func main() {
|
||||
urlStr := "https://api.bilibili.com/x/space/wbi/acc/info?mid=1850091"
|
||||
newUrlStr, err := signAndGenerateURL(urlStr)
|
||||
u, err := url.Parse("https://api.bilibili.com/x/space/wbi/acc/info?mid=1850091")
|
||||
if err != nil {
|
||||
fmt.Printf("Error: %s", err)
|
||||
return
|
||||
panic(err)
|
||||
}
|
||||
req, err := http.NewRequest("GET", newUrlStr, nil)
|
||||
fmt.Printf("orig: %s\n", u.String())
|
||||
err = Sign(u)
|
||||
if err != nil {
|
||||
fmt.Printf("Error: %s", err)
|
||||
return
|
||||
panic(err)
|
||||
}
|
||||
req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36")
|
||||
req.Header.Set("Referer", "https://www.bilibili.com/")
|
||||
response, err := http.DefaultClient.Do(req)
|
||||
fmt.Printf("signed: %s\n", u.String())
|
||||
|
||||
// 获取 wbi 时未修改 header
|
||||
// 但实际使用签名后的 url 时发现风控较为严重
|
||||
}
|
||||
|
||||
// Sign 为链接签名
|
||||
func Sign(u *url.URL) error {
|
||||
return wbiKeys.Sign(u)
|
||||
}
|
||||
|
||||
// Update 无视过期时间更新
|
||||
func Update() error {
|
||||
return wbiKeys.Update()
|
||||
}
|
||||
|
||||
func Get() (wk WbiKeys, err error) {
|
||||
if err = wk.update(false); err != nil {
|
||||
return WbiKeys{}, err
|
||||
}
|
||||
return wbiKeys, nil
|
||||
}
|
||||
|
||||
var wbiKeys WbiKeys
|
||||
|
||||
type WbiKeys struct {
|
||||
Img string
|
||||
Sub string
|
||||
Mixin string
|
||||
lastUpdateTime time.Time
|
||||
}
|
||||
|
||||
// Sign 为链接签名
|
||||
func (wk *WbiKeys) Sign(u *url.URL) (err error) {
|
||||
if err = wk.update(false); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
values := u.Query()
|
||||
|
||||
values = removeUnwantedChars(values, '!', '\'', '(', ')', '*') // 必要性存疑?
|
||||
|
||||
values.Set("wts", strconv.FormatInt(time.Now().Unix(), 10))
|
||||
|
||||
// [url.Values.Encode] 内会对参数排序,
|
||||
// 且遍历 map 时本身就是无序的
|
||||
hash := md5.Sum([]byte(values.Encode() + wk.Mixin)) // Calculate w_rid
|
||||
values.Set("w_rid", hex.EncodeToString(hash[:]))
|
||||
u.RawQuery = values.Encode()
|
||||
return nil
|
||||
}
|
||||
|
||||
// Update 无视过期时间更新
|
||||
func (wk *WbiKeys) Update() (err error) {
|
||||
return wk.update(true)
|
||||
}
|
||||
|
||||
// update 按需更新
|
||||
func (wk *WbiKeys) update(purge bool) error {
|
||||
if !purge && time.Since(wk.lastUpdateTime) < time.Hour {
|
||||
return nil
|
||||
}
|
||||
|
||||
// 测试下来不用修改 header 也能过
|
||||
resp, err := http.Get("https://api.bilibili.com/x/web-interface/nav")
|
||||
if err != nil {
|
||||
fmt.Printf("Request failed: %s", err)
|
||||
return
|
||||
}
|
||||
defer response.Body.Close()
|
||||
body, err := io.ReadAll(response.Body)
|
||||
if err != nil {
|
||||
fmt.Printf("Failed to read response: %s", err)
|
||||
return
|
||||
}
|
||||
fmt.Println(string(body))
|
||||
}
|
||||
|
||||
func signAndGenerateURL(urlStr string) (string, error) {
|
||||
urlObj, err := url.Parse(urlStr)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
imgKey, subKey := getWbiKeysCached()
|
||||
query := urlObj.Query()
|
||||
params := map[string]string{}
|
||||
for k, v := range query {
|
||||
params[k] = v[0]
|
||||
}
|
||||
newParams := encWbi(params, imgKey, subKey)
|
||||
for k, v := range newParams {
|
||||
query.Set(k, v)
|
||||
}
|
||||
urlObj.RawQuery = query.Encode()
|
||||
newUrlStr := urlObj.String()
|
||||
return newUrlStr, nil
|
||||
}
|
||||
|
||||
func encWbi(params map[string]string, imgKey, subKey string) map[string]string {
|
||||
mixinKey := getMixinKey(imgKey + subKey)
|
||||
currTime := strconv.FormatInt(time.Now().Unix(), 10)
|
||||
params["wts"] = currTime
|
||||
|
||||
// Sort keys
|
||||
keys := make([]string, 0, len(params))
|
||||
for k := range params {
|
||||
keys = append(keys, k)
|
||||
}
|
||||
sort.Strings(keys)
|
||||
|
||||
// Remove unwanted characters
|
||||
for k, v := range params {
|
||||
v = sanitizeString(v)
|
||||
params[k] = v
|
||||
}
|
||||
|
||||
// Build URL parameters
|
||||
query := url.Values{}
|
||||
for _, k := range keys {
|
||||
query.Set(k, params[k])
|
||||
}
|
||||
queryStr := query.Encode()
|
||||
|
||||
// Calculate w_rid
|
||||
hash := md5.Sum([]byte(queryStr + mixinKey))
|
||||
params["w_rid"] = hex.EncodeToString(hash[:])
|
||||
return params
|
||||
}
|
||||
|
||||
func getMixinKey(orig string) string {
|
||||
var str strings.Builder
|
||||
for _, v := range mixinKeyEncTab {
|
||||
if v < len(orig) {
|
||||
str.WriteByte(orig[v])
|
||||
}
|
||||
}
|
||||
return str.String()[:32]
|
||||
}
|
||||
|
||||
func sanitizeString(s string) string {
|
||||
unwantedChars := []string{"!", "'", "(", ")", "*"}
|
||||
for _, char := range unwantedChars {
|
||||
s = strings.ReplaceAll(s, char, "")
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
func updateCache() {
|
||||
if time.Since(lastUpdateTime).Minutes() < 10 {
|
||||
return
|
||||
}
|
||||
imgKey, subKey := getWbiKeys()
|
||||
cache.Store("imgKey", imgKey)
|
||||
cache.Store("subKey", subKey)
|
||||
lastUpdateTime = time.Now()
|
||||
}
|
||||
|
||||
func getWbiKeysCached() (string, string) {
|
||||
updateCache()
|
||||
imgKeyI, _ := cache.Load("imgKey")
|
||||
subKeyI, _ := cache.Load("subKey")
|
||||
return imgKeyI.(string), subKeyI.(string)
|
||||
}
|
||||
|
||||
func getWbiKeys() (string, string) {
|
||||
client := &http.Client{}
|
||||
req, err := http.NewRequest("GET", "https://api.bilibili.com/x/web-interface/nav", nil)
|
||||
if err != nil {
|
||||
fmt.Printf("Error creating request: %s", err)
|
||||
return "", ""
|
||||
}
|
||||
req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36")
|
||||
req.Header.Set("Referer", "https://www.bilibili.com/")
|
||||
resp, err := client.Do(req)
|
||||
if err != nil {
|
||||
fmt.Printf("Error sending request: %s", err)
|
||||
return "", ""
|
||||
return err
|
||||
}
|
||||
defer resp.Body.Close()
|
||||
body, err := io.ReadAll(resp.Body)
|
||||
if err != nil {
|
||||
fmt.Printf("Error reading response: %s", err)
|
||||
return "", ""
|
||||
return err
|
||||
}
|
||||
json := string(body)
|
||||
imgURL := gjson.Get(json, "data.wbi_img.img_url").String()
|
||||
subURL := gjson.Get(json, "data.wbi_img.sub_url").String()
|
||||
imgKey := strings.Split(strings.Split(imgURL, "/")[len(strings.Split(imgURL, "/"))-1], ".")[0]
|
||||
subKey := strings.Split(strings.Split(subURL, "/")[len(strings.Split(subURL, "/"))-1], ".")[0]
|
||||
return imgKey, subKey
|
||||
|
||||
nav := Nav{}
|
||||
err = json.Unmarshal(body, &nav)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if nav.Code != 0 && nav.Code != -101 { // -101 未登录时也会返回两个 key
|
||||
return fmt.Errorf("unexpected code: %d, message: %s", nav.Code, nav.Message)
|
||||
}
|
||||
img := nav.Data.WbiImg.ImgUrl
|
||||
sub := nav.Data.WbiImg.SubUrl
|
||||
if img == "" || sub == "" {
|
||||
return fmt.Errorf("empty image or sub url: %s", body)
|
||||
}
|
||||
|
||||
// https://i0.hdslb.com/bfs/wbi/7cd084941338484aae1ad9425b84077c.png
|
||||
imgParts := strings.Split(img, "/")
|
||||
subParts := strings.Split(sub, "/")
|
||||
|
||||
// 7cd084941338484aae1ad9425b84077c.png
|
||||
imgPng := imgParts[len(imgParts)-1]
|
||||
subPng := subParts[len(subParts)-1]
|
||||
|
||||
// 7cd084941338484aae1ad9425b84077c
|
||||
wbiKeys.Img = strings.TrimSuffix(imgPng, ".png")
|
||||
wbiKeys.Sub = strings.TrimSuffix(subPng, ".png")
|
||||
|
||||
wbiKeys.mixin()
|
||||
wbiKeys.lastUpdateTime = time.Now()
|
||||
return nil
|
||||
}
|
||||
|
||||
func (wk *WbiKeys) mixin() {
|
||||
var mixin [32]byte
|
||||
wbi := wk.Img + wk.Sub
|
||||
for i := range mixin { // for i := 0; i < len(mixin); i++ {
|
||||
mixin[i] = wbi[mixinKeyEncTab[i]]
|
||||
}
|
||||
wk.Mixin = string(mixin[:])
|
||||
}
|
||||
|
||||
var mixinKeyEncTab = [...]int{
|
||||
46, 47, 18, 2, 53, 8, 23, 32,
|
||||
15, 50, 10, 31, 58, 3, 45, 35,
|
||||
27, 43, 5, 49, 33, 9, 42, 19,
|
||||
29, 28, 14, 39, 12, 38, 41, 13,
|
||||
37, 48, 7, 16, 24, 55, 40, 61,
|
||||
26, 17, 0, 1, 60, 51, 30, 4,
|
||||
22, 25, 54, 21, 56, 59, 6, 63,
|
||||
57, 62, 11, 36, 20, 34, 44, 52,
|
||||
}
|
||||
|
||||
func removeUnwantedChars(v url.Values, chars ...byte) url.Values {
|
||||
b := []byte(v.Encode())
|
||||
for _, c := range chars {
|
||||
b = bytes.ReplaceAll(b, []byte{c}, nil)
|
||||
}
|
||||
s, err := url.ParseQuery(string(b))
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
type Nav struct {
|
||||
Code int `json:"code"`
|
||||
Message string `json:"message"`
|
||||
Ttl int `json:"ttl"`
|
||||
Data struct {
|
||||
WbiImg struct {
|
||||
ImgUrl string `json:"img_url"`
|
||||
SubUrl string `json:"sub_url"`
|
||||
} `json:"wbi_img"`
|
||||
|
||||
// ......
|
||||
} `json:"data"`
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user