Update zippyshare resolver 2022-07-17

src/integrations/zippy.rs

@@ -9,6 +9,78 @@ pub fn is_zippyshare_url(url: &str) -> bool {
         .is_match(url)
 }
 
+pub async fn resolve_link(url: &str) -> Result<String> {
+    // Regex to check if the provided url is a zippyshare download url
+    let re = Regex::new(r"^(https?://(?:www\d*\.)?zippyshare\.com)/v/[0-9a-zA-Z]+/file\.html$")?;
+    if !re.is_match(url) {
+        return Err(Error::new(ErrorKind::Other, "URL is not a zippyshare url").into());
+    }
+
+    // Extract the hostname (with https:// prefix) for later
+    let host = &re.captures(url).unwrap()[1];
+
+    // Download the html body for the download page
+    let body = reqwest::get(url).await?.text().await?;
+
+    // Try to extract the link using the latest extractor
+    let link = extract_dl_link_2022_07_17(&host, &body).await;
+    // Try the previous extractor as fallback if it didn't work
+    let link = match link {
+        Err(_) => extract_dl_link_2022_03_07(&host, &body).await,
+        ok => ok,
+    };
+
+    link
+}
+
+/*
+Updated: 17.07.2022
+Link generation code:
+- `var a = $1`
+- $1 is the only variable that actually changes
+- effectively: `var b = "asdasd".substr(0, 3).length` seems to be fixed
+- evaluates to: `var b = 3`
+- `document.getElementById('dlbutton').href = "/d/0Ky7p1C6/"+(Math.pow(a, 3)+b)+"/some-file-name.part1.rar"`
+- evaluates to: `href = "/d/0Ky7p1C6/"+(Math.pow(a, 3)+3)+"/some-file-name.part1.rar"`
+
+```
+var a = 114;
+document.getElementById('dlbutton').omg = "asdasd".substr(0, 3);
+var b = document.getElementById('dlbutton').omg.length;
+document.getElementById('dlbutton').href = "/d/0Ky7p1C6/"+(Math.pow(a, 3)+b)+"/some-file-name.part1.rar";
+```
+ */
+pub async fn extract_dl_link_2022_07_17(host: &str, body: &str) -> Result<String> {
+    let re_var_a = Regex::new(
+        r#"var a = (\d+);"#
+    )?;
+
+    // Regex to match the javascript part of the html that generates the real download link
+    let re_link = Regex::new(
+        r#"document\.getElementById\('dlbutton'\)\.href = "(/d/.+/)"\+\(Math\.pow\(a, 3\)\+b\)\+"(.+)";"#,
+    )?;
+    
+    let cap_var_a = match re_var_a.captures(&body) {
+        Some(cap) => cap,
+        None => return Err(Error::new(ErrorKind::Other, "Var a not found").into()),
+    };
+
+    let cap_link = match re_link.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 var_a: i64 = cap_var_a[1].parse()?;
+
+    let middle = var_a.pow(3) + 3;
+
+    let dl_url = format!("{}{}{}{}", &host, url_start, middle, url_end);
+
+    Ok(dl_url)
+}
+
 /*
 Updated: 07.03.2022
 Link generation code:
@@ -23,19 +95,7 @@ Link generation code:
 document.getElementById('dlbutton').href = "/d/0Ky7p1C6/" + (186549 % 51245 + 186549 % 913) + "/some-file-name.part1.rar";
 ```
 */
-pub async fn resolve_link(url: &str) -> Result<String> {
-    // Regex to check if the provided url is a zippyshare download url
-    let re = Regex::new(r"(https://www\d*\.zippyshare\.com)")?;
-    if !re.is_match(url) {
-        return Err(Error::new(ErrorKind::Other, "URL is not a zippyshare url").into());
-    }
-
-    // Extract the hostname (with https:// prefix) for later
-    let base_host = &re.captures(url).unwrap()[0];
-
-    // Download the html body for the download page
-    let body = reqwest::get(url).await?.text().await?;
-
+pub async fn extract_dl_link_2022_03_07(host: &str, body: &str) -> Result<String> {
     // Regex to match the javascript part of the html that generates the real download link
     let re_link = Regex::new(
         r#"document\.getElementById\('dlbutton'\)\.href = "(/d/.+/)" \+ \((\d+) % (\d+) \+ \d+ % (\d+)\) \+ "(.+)";"#,
@@ -55,7 +115,7 @@ pub async fn resolve_link(url: &str) -> Result<String> {
 
     let mixed = n2 % n3 + n4 % n5;
 
-    let dl_url = format!("{}{}{}{}", &base_host, url_start, mixed, url_end);
+    let dl_url = format!("{}{}{}{}", &host, url_start, mixed, url_end);
 
     Ok(dl_url)
 }