feat: support default browser for CLI (#345)

apps/gpauth/Cargo.toml

@@ -22,3 +22,4 @@ html-escape = "0.2.13"
 webkit2gtk = "0.18.2"
 tauri = { workspace = true, features = ["http-all"] }
 compile-time.workspace = true
+open.workspace = true

apps/gpauth/src/browser_authenticator.rs

@@ -0,0 +1,34 @@
+use std::{env::temp_dir, io::Write};
+
+pub struct BrowserAuthenticator<'a> {
+  auth_request: &'a str,
+}
+
+impl BrowserAuthenticator<'_> {
+  pub fn new(auth_request: &str) -> BrowserAuthenticator {
+    BrowserAuthenticator { auth_request }
+  }
+
+  pub fn authenticate(&self) -> anyhow::Result<()> {
+    if self.auth_request.starts_with("http") {
+      open::that_detached(self.auth_request)?;
+    } else {
+      let html_file = temp_dir().join("gpauth.html");
+      let mut file = std::fs::File::create(&html_file)?;
+
+      file.write_all(self.auth_request.as_bytes())?;
+
+      open::that_detached(html_file)?;
+    }
+
+    Ok(())
+  }
+}
+
+impl Drop for BrowserAuthenticator<'_> {
+  fn drop(&mut self) {
+    // Cleanup the temporary file
+    let html_file = temp_dir().join("gpauth.html");
+    let _ = std::fs::remove_file(html_file);
+  }
+}

apps/gpauth/src/cli.rs

@@ -11,7 +11,10 @@ use serde_json::json;
 use tauri::{App, AppHandle, RunEvent};
 use tempfile::NamedTempFile;
 
-use crate::auth_window::{portal_prelogin, AuthWindow};
+use crate::{
+  auth_window::{portal_prelogin, AuthWindow},
+  browser_authenticator::BrowserAuthenticator,
+};
 
 const VERSION: &str = concat!(env!("CARGO_PKG_VERSION"), " (", compile_time::date_str!(), ")");
 
@@ -37,6 +40,8 @@ struct Cli {
   ignore_tls_errors: bool,
   #[arg(long)]
   clean: bool,
+  #[arg(long)]
+  default_browser: bool,
 }
 
 impl Cli {
@@ -56,6 +61,15 @@ impl Cli {
       None => portal_prelogin(&self.server, &gp_params).await?,
     };
 
+    if self.default_browser {
+      let browser_auth = BrowserAuthenticator::new(&saml_request);
+      browser_auth.authenticate()?;
+
+      info!("Please continue the authentication process in the default browser");
+
+      return Ok(());
+    }
+
     self.saml_request.replace(saml_request);
 
     let app = create_app(self.clone())?;

apps/gpauth/src/main.rs

@@ -1,6 +1,7 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
 mod auth_window;
+mod browser_authenticator;
 mod cli;
 
 #[tokio::main]