feat: download using range params

src/util.rs

@@ -1,5 +1,9 @@
+use std::collections::BTreeMap;
+
 use fancy_regex::Regex;
 use rand::Rng;
+use anyhow::Result;
+use url::Url;
 
 const CONTENT_PLAYBACK_NONCE_ALPHABET: &[u8; 64] =
     b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
@@ -15,7 +19,7 @@ where
 }
 
 /// Generates a random string with given length and byte charset.
-pub fn random_string(charset: &[u8], length: usize) -> String {
+fn random_string(charset: &[u8], length: usize) -> String {
     let mut result = String::with_capacity(length);
     let mut rng = rand::thread_rng();
 
@@ -34,6 +38,15 @@ pub fn generate_content_playback_nonce() -> String {
     random_string(CONTENT_PLAYBACK_NONCE_ALPHABET, 16)
 }
 
-pub fn generate_t_parameter() -> String {
-    random_string(CONTENT_PLAYBACK_NONCE_ALPHABET, 12)
+pub fn url_to_params(url: &str) -> Result<(String, BTreeMap<String, String>)> {
+    let parsed_url = Url::parse(url)?;
+    let url_params: BTreeMap<String, String> = parsed_url
+        .query_pairs()
+        .map(|(k, v)| (k.to_string(), v.to_string()))
+        .collect();
+
+    let mut url_base = parsed_url.clone();
+    url_base.set_query(None);
+
+    Ok((url_base.to_string(), url_params))
 }