url的生成规则
在v2ex发现了一个帖子
代码
于是，我写了一个根据url反推博主主页的小工具 WeiboHack
public class WeiBoHack {
public static String getIndexPage(String picUrl) {
String fileName = picUrl.substring(picUrl.lastIndexOf("/") + 1, picUrl.lastIndexOf("."));
if (fileName.startsWith("00")) {
String front8Letter = fileName.substring(0, 8);
long uuid = Base62Utils.decodeBase62(front8Letter);
return appendUUID(uuid);
} else {
String front8Letter = fileName.substring(0, 8);
long uuid = Long.valueOf(front8Letter, 16);
return appendUUID(uuid);
}
}
private static String appendUUID(long uuid) {
return "https://weibo.com/u/" + uuid;
}
}
Base62Utils 的工具类代码如下
public class Base62Utils {
private static final String base62Char = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
public static long decode(String str) {
char[] chars = new StringBuilder(str).reverse().toString().toCharArray();
long count = 1;
long result = 0;
for (char aChar : chars) {
result += base62Char.indexOf(aChar) * count;
count *= 62;
}
return result;
}
}
