feat(fs):通过实现自定义协议支持图片的读取。

src-tauri/src/main.rs

@@ -2,13 +2,16 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
 mod commands;
+mod protocol;
 mod utils;
 
 use commands::AppHold;
+use protocol::comic_protocol;
 use tauri::Manager;
 
 fn main() {
     tauri::Builder::default()
+        .register_uri_scheme_protocol("comic", comic_protocol)
         .invoke_handler(tauri::generate_handler![
             commands::prelude::scan_directory,
             commands::prelude::show_drives,

src-tauri/src/protocol.rs

@@ -0,0 +1,43 @@
+use std::{error::Error, io::Cursor, path::Path};
+
+use tauri::{
+    http::{Request, Response, ResponseBuilder},
+    AppHandle, Runtime,
+};
+use urlencoding::decode;
+
+pub fn comic_protocol<R: Runtime>(
+    _app_handler: &AppHandle<R>,
+    request: &Request,
+) -> Result<Response, Box<dyn Error>> {
+    let response_builder = ResponseBuilder::new();
+    let path = request
+        .uri()
+        .strip_prefix("comic://localhost/")
+        .map(|u| decode(u).unwrap())
+        .unwrap();
+    println!("[debug]request: {}", path);
+    if path.len() == 0 {
+        return response_builder
+            .mimetype("text/plain")
+            .status(404)
+            .body(Vec::new());
+    }
+
+    let path = Path::new(path.as_ref());
+    if !path.exists() {
+        return response_builder
+            .mimetype("text/plain")
+            .status(404)
+            .body(Vec::new());
+    }
+
+    let content = image::io::Reader::open(path)?.decode()?;
+    let mut bytes: Vec<u8> = Vec::new();
+    content.write_to(&mut Cursor::new(&mut bytes), image::ImageOutputFormat::Png)?;
+
+    response_builder
+        .mimetype("image/png")
+        .status(200)
+        .body(bytes)
+}