feat: bili_ticket 算法 Java 实现 及 信息补充 及 错误修正 (#1061)
* feat: 空间头图及拼写错误修正 * feat(fav/info.md): code 11010 * fix(misc/sign/wbi.md): java extra params * feat(misc/sign/bili_ticket.md): description and java demo * feat(video_ranking/dynamic.md): 分区视频相关接口 * fix(video_ranking/dynamic.md): 未关闭的标签 * feat(README.md): 补充链接 * feat(clientinfo/ip.md): 查询任意 IP 地址的归属地 * feat: get buvid3 buvid4 from api * feat: new error code & format * feat(misc/picture.md): 图片格式化更多规则
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`bili_ticket` 目前没发现多少风控价值,但是暂且在这里提供一份示例。
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# BiliTicket
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## 简述
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`bili_ticket` 位于请求头 Cookie 中, 非必需, 但存在可降低风控概率
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由 [@aynuarance](https://github.com/aynuarance) 于 [#903](https://github.com/SocialSisterYi/bilibili-API-collect/issues/903) 提供的思路,根据时间戳使用 `hmac_sha256` 算法计算 `hexsign`。
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是 [JWT 令牌](https://jwt.io/),有效时长为 259260 秒,即 3 天。
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例如 `eyJhbGciOiJIUzI1NiIsImtpZCI6InMwMyIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MDI3NDI3NDYsImlhdCI6MTcwMjQ4MzQ4NiwicGx0IjotMX0.xQgtTAc41NA1gzvd9yKUPgucUy_DKcQj6OG1vj8V7ZA`
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@@ -14,7 +17,18 @@
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}
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```
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# Python 示例
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## 算法
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1. 获取 UNIX 秒级时间戳存入变量如 `timestamp`
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2. 计算变量 `hexsign` 值,使用 `hmac_sha256` 算法,密钥为 `XgwSnGZ1p`,消息为字符串 `"ts"` 与变量 `timestamp` 值拼接
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3. 构造请求参数,`key_id` 为 `ec02`,`hexsign` 为变量 `hexsign` 值,`context[ts]` 为变量 `timestamp` 值,`csrf` 为 cookie 中的 `bili_jct` 值也可为空
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4. 发送 `POST` 请求,获取 `data` 字段中的 `ticket` 字段的值即为所求
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## Demo
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### Python
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需要 `requests` 依赖
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```python
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import hmac
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@@ -59,4 +73,106 @@ if __name__ == '__main__':
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'user-agent': "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0"
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}
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resp = requests.post(url, params=params,headers=headers).json()
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```
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print(resp)
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```
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### Java
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无需第三方依赖
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```java
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URI;
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import java.nio.charset.StandardCharsets;
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import javax.crypto.Mac;
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import javax.crypto.spec.SecretKeySpec;
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public class BiliTicketDemo {
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/**
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* Convert a byte array to a hex string.
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*
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* @param bytes The byte array to convert.
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* @return The hex string representation of the given byte array.
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*/
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public static String bytesToHex(byte[] bytes) {
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StringBuilder sb = new StringBuilder();
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for (byte b : bytes) {
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String hex = Integer.toHexString(0xff & b);
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if (hex.length() == 1) {
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sb.append('0');
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}
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sb.append(hex);
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}
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return sb.toString();
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}
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/**
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* Generate a HMAC-SHA256 hash of the given message string using the given key
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* string.
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*
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* @param key The key string to use for the HMAC-SHA256 hash.
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* @param message The message string to hash.
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* @throws Exception If an error occurs during the HMAC-SHA256 hash generation.
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* @return The HMAC-SHA256 hash of the given message string using the given key
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* string.
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*/
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public static String hmacSha256(String key, String message) throws Exception {
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Mac mac = Mac.getInstance("HmacSHA256");
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SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "HmacSHA256");
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mac.init(secretKeySpec);
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byte[] hash = mac.doFinal(message.getBytes(StandardCharsets.UTF_8));
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return bytesToHex(hash);
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}
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/**
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* Get a Bilibili web ticket for the given CSRF token.
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*
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* @param csrf The CSRF token to use for the web ticket, can be {@code null} or
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* empty.
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* @return The Bilibili web ticket raw response for the given CSRF token.
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* @throws Exception If an error occurs during the web ticket generation.
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* @see https://github.com/SocialSisterYi/bilibili-API-collect/blob/master/docs/misc/sign/bili_ticket.md
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*/
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public static String getBiliTicket(String csrf) throws Exception {
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// params
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long ts = System.currentTimeMillis() / 1000;
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String hexSign = hmacSha256("XgwSnGZ1p", "ts" + ts);
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StringBuilder url = new StringBuilder(
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"https://api.bilibili.com/bapis/bilibili.api.ticket.v1.Ticket/GenWebTicket");
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url.append('?');
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url.append("key_id=ec02").append('&');
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url.append("hexsign=").append(hexSign).append('&');
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url.append("context[ts]=").append(ts).append('&');
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url.append("csrf=").append(csrf == null ? "" : csrf);
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// request
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HttpURLConnection conn = (HttpURLConnection) new URI(url.toString()).toURL().openConnection();
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conn.setRequestMethod("POST");
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conn.addRequestProperty("User-Agent", "Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0");
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InputStream in = conn.getInputStream();
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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int b;
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while ((b = in.read()) != -1) {
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out.write(b);
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}
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return new String(out.toByteArray(), StandardCharsets.UTF_8);
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}
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/**
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* Main method to test the BiliTicketDemo class.
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*
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* @param args The command line arguments (not used).
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*/
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public static void main(String[] args) {
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try {
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System.out.println(getBiliTicket("")); // use empty CSRF here
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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```
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@@ -700,8 +700,6 @@ public class WbiTest {
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map.put("bar", "五一四");
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map.put("baz", 1919810);
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map.put("wts", System.currentTimeMillis() / 1000);
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map.put("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");
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map.put("Referer", "https://www.bilibili.com/");
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StringJoiner param = new StringJoiner("&");
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//排序 + 拼接字符串
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map.entrySet().stream()
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