overtls_generate_url && overtls_free_string

cbindgen.toml

@@ -4,6 +4,8 @@ include = [
     "over_tls_client_run_with_ssr_url",
     "over_tls_client_stop",
     "overtls_set_log_callback",
+    "overtls_generate_url",
+    "overtls_free_string",
 ]
 exclude = [
     "Java_com_github_shadowsocks_bg_OverTlsWrapper_runClient",

src/api.rs

@@ -151,3 +151,35 @@ pub unsafe extern "C" fn over_tls_client_stop() -> c_int {
     }
     0
 }
+
+/// # Safety
+///
+/// Create a SSR URL from the config file.
+#[no_mangle]
+pub unsafe extern "C" fn overtls_generate_url(cfg_path: *const c_char, include_ca_file: bool) -> *mut c_char {
+    let cfg_path = std::ffi::CStr::from_ptr(cfg_path);
+    let cfg_path = match cfg_path.to_str() {
+        Ok(s) => s,
+        Err(_) => return std::ptr::null_mut(),
+    };
+    let url = match crate::config::generate_ssr_url(cfg_path, include_ca_file) {
+        Ok(s) => s,
+        Err(_) => return std::ptr::null_mut(),
+    };
+    let url = match std::ffi::CString::new(url) {
+        Ok(s) => s,
+        Err(_) => return std::ptr::null_mut(),
+    };
+    url.into_raw()
+}
+
+/// # Safety
+///
+/// Free the string returned by `overtls_generate_url`.
+#[no_mangle]
+pub unsafe extern "C" fn overtls_free_string(s: *mut c_char) {
+    if s.is_null() {
+        return;
+    }
+    drop(std::ffi::CString::from_raw(s));
+}

src/config.rs

@@ -478,6 +478,17 @@ impl Config {
     }
 }
 
+pub(crate) fn generate_ssr_url<P>(path: P, include_ca_file: bool) -> Result<String>
+where
+    P: AsRef<std::path::Path>,
+{
+    let config = Config::from_config_file(path)?;
+    if config.certificate_content().is_some() && !include_ca_file {
+        log::warn!("Certificate content discarded");
+    }
+    config.generate_ssr_url(include_ca_file)
+}
+
 #[test]
 fn test_config() {
     let mut config = Config::new();

src/lib.rs

@@ -15,7 +15,7 @@ pub(crate) mod udprelay;
 pub(crate) mod webapi;
 pub(crate) mod weirduri;
 
-pub use api::{over_tls_client_run, over_tls_client_run_with_ssr_url, over_tls_client_stop};
+pub use api::{over_tls_client_run, over_tls_client_run_with_ssr_url, over_tls_client_stop, overtls_free_string, overtls_generate_url};
 use base64_wrapper::{base64_decode, base64_encode, Base64Engine};
 use bytes::BytesMut;
 pub use client::run_client;