Update zippyshare resolver

src/zippy.rs

@@ -3,6 +3,22 @@ use std::io::{ Error, ErrorKind };
 
 use crate::errors::ResBE;
 
+/*
+Updated: 08.01.2022
+Link generation code:
+- `n`, `b` and `z` are dynamic (random) on each reload
+- `%2` and `%3` for n and b don't change
+- The main number for `n` and `b` is always equal
+- `z` is always the `n`/`b` main number + 3
+- Link middle part calculation stays the same
+
+``` 
+var n = 794218%2;
+var b = 794218%3;
+var z = 794221;
+document.getElementById('dlbutton').href = "/d/0Ky7p1C6/"+(n + b + z - 3)+"/some-file-name.part1.rar";
+```
+*/
 pub async fn resolve_link(url: &str) -> ResBE<String> {
 
     // Regex to check if the provided url is a zippyshare download url
@@ -19,21 +35,28 @@ pub async fn resolve_link(url: &str) -> ResBE<String> {
         .text().await?;
 
     // Regex to match the javascript part of the html that generates the real download link
-    let re_all = Regex::new(r#"document\.getElementById\('dlbutton'\)\.href = "(/d/.+/)" \+ \((\d+) % (\d+) \+ (\d+) % (\d+)\) \+ "(.+)";"#)?;
+    let re_link = Regex::new(r#"document\.getElementById\('dlbutton'\)\.href = "(/d/.+/)"\+\(.+\)\+"(.+)";"#)?;
+    let re_z = Regex::new(r#"var z = (\d+);"#)?;
 
-    let cap_all = match re_all.captures(&body) {
+    let cap_link = match re_link.captures(&body) {
         Some(cap) => cap,
         None => return Err(Error::new(ErrorKind::Other, "Link not found").into())
     };
 
-    let a: i32 = i32::from_str_radix(&cap_all[2], 10)?;
-    let b: i32 = i32::from_str_radix(&cap_all[3], 10)?;
-    let c: i32 = i32::from_str_radix(&cap_all[4], 10)?;
-    let d: i32 = i32::from_str_radix(&cap_all[5], 10)?;
+    let cap_z = match re_z.captures(&body) {
+        Some(cap) => cap,
+        None => return Err(Error::new(ErrorKind::Other, "Link not found").into())
+    };
+    
+    let url_start = &cap_link[1];
+    let url_end = &cap_link[2];
+    let z: i32 = i32::from_str_radix(&cap_z[1], 10)?;
+    let n = (z - 3) % 2;
+    let b = (z - 3) % 3;
 
-    let mixed = a % b + c % d;
+    let mixed = n + b + z - 3;
 
-    let dl_url = format!("{}{}{}{}", &base_host, &cap_all[1], mixed, &cap_all[6]);
+    let dl_url = format!("{}{}{}{}", &base_host, url_start, mixed, url_end);
 
     Ok(dl_url)
 }