feature parity with legacy ytproxy

Cargo.toml

@@ -42,5 +42,7 @@ optimized = ["libwebp-sys?/sse41", "libwebp-sys?/avx2", "libwebp-sys?/neon"]
 
 qhash = ["blake3"]
 
+prefix-path = []
+
 [profile.release]
 lto = true

src/main.rs

@@ -112,6 +112,9 @@ fn is_header_allowed(header: &str) -> bool {
     !matches!(
         header,
         "host"
+            | "authorization"
+            | "cookie"
+            | "etag"
             | "content-length"
             | "set-cookie"
             | "alt-svc"

src/utils.rs

@@ -2,6 +2,16 @@ use qstring::QString;
 use reqwest::Url;
 use std::borrow::Cow;
 use std::collections::BTreeMap;
+use std::env;
+
+#[cfg(feature = "prefix-path")]
+{
+    use once_cell::sync::Lazy;
+    static PREFIX_PATH: Lazy<Option<String>> = Lazy::new(|| match env::var("PREFIX_PATH") {
+        Ok(v) => Some(String::from(v)),
+        Err(e) => panic!("$PREFIX_PATH is not set ({})", e)
+    });
+}
 
 pub fn read_buf(buf: &[u8], pos: &mut usize) -> u8 {
     let byte = buf[*pos];
@@ -13,7 +23,6 @@ fn finalize_url(path: &str, query: BTreeMap<String, String>) -> String {
     #[cfg(feature = "qhash")]
     {
         use std::collections::BTreeSet;
-        use std::env;
 
         let qhash = {
             let secret = env::var("HASH_SECRET");
@@ -46,12 +55,30 @@ fn finalize_url(path: &str, query: BTreeMap<String, String>) -> String {
         if qhash.is_some() {
             let mut query = QString::new(query.into_iter().collect::<Vec<_>>());
             query.add_pair(("qhash", qhash.unwrap()));
-            return format!("{}?{}", path, query);
+            #[cfg(not(feature = "prefix-path"))]
+            {
+                return format!("{}?{}", path, query);
+            }
+
+
+            #[cfg(feature = "prefix-path")]
+            {
+                return format!("{}{}?{}", PREFIX_PATH.as_ref().unwrap().to_string(), path, query);
+            }
         }
     }
 
     let query = QString::new(query.into_iter().collect::<Vec<_>>());
-    format!("{}?{}", path, query)
+    #[cfg(not(feature = "prefix-path"))]
+    {
+        format!("{}?{}", path, query)
+    }
+
+
+    #[cfg(feature = "prefix-path")]
+    {
+        format!("{}{}?{}", PREFIX_PATH.as_ref().unwrap().to_string(), path, query)
+    }
 }
 
 pub fn localize_url(url: &str, host: &str) -> String {