akai
466 lines
15 KiB
Rust
466 lines
15 KiB
Rust
use serde::Serialize;
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use serde_json::Value;
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use std::sync::Mutex;
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use std::{
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fs,
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io::{Read, Write},
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net::{SocketAddr, TcpStream},
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path::{Path, PathBuf},
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process::Command,
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time::Duration,
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};
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use tauri::{AppHandle, Manager};
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const DEFAULT_PORT: u16 = 5177;
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const PORT_SCAN_LIMIT: u16 = 100;
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static LAUNCH_LOCK: Mutex<()> = Mutex::new(());
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#[derive(Serialize)]
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#[serde(rename_all = "camelCase")]
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pub struct ReviewEditorLaunchResponse {
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ok: bool,
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url: String,
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reused: bool,
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review_root: String,
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version: String,
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session_id: Option<String>,
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}
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struct CommandOutput {
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stdout: String,
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stderr: String,
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}
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struct PythonCommand {
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program: String,
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args: Vec<String>,
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}
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#[tauri::command]
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pub async fn launch_epub_review_editor(
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app: AppHandle,
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epub_path: Option<String>,
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) -> Result<ReviewEditorLaunchResponse, String> {
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tauri::async_runtime::spawn_blocking(move || launch_epub_review_editor_sync(&app, epub_path))
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.await
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.map_err(|err| err.to_string())?
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}
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fn launch_epub_review_editor_sync(
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app: &AppHandle,
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epub_path: Option<String>,
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) -> Result<ReviewEditorLaunchResponse, String> {
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let _launch_guard = LAUNCH_LOCK
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.lock()
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.map_err(|_| "审校器启动锁已损坏。请重启 Readest 后重试。".to_string())?;
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let tool_root = resolve_tool_root(app)?;
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let server_path = tool_root.join("server.py");
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if !server_path.exists() {
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return Err(format!(
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"没有找到审校器后端：{}",
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server_path.to_string_lossy()
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));
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}
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let review_root = std::env::var("READEST_REVIEW_ROOT")
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.map(PathBuf::from)
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.unwrap_or_else(|_| {
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app.path()
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.app_data_dir()
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.unwrap_or_else(|_| std::env::current_dir().unwrap_or_else(|_| PathBuf::from(".")))
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.join("epub_review_sessions")
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});
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fs::create_dir_all(&review_root).map_err(|err| {
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format!(
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"创建审校数据目录失败：{} ({err})",
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review_root.to_string_lossy()
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)
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})?;
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let expected_version = read_expected_version(&tool_root);
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if let Some(url) = find_running_editor(expected_version.as_deref(), &review_root) {
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let session_id = ensure_session_from_path(&url, epub_path.as_deref())?;
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return Ok(ReviewEditorLaunchResponse {
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ok: true,
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url,
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reused: true,
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review_root: review_root.to_string_lossy().to_string(),
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version: expected_version.unwrap_or_default(),
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session_id,
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});
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}
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let runtime_root = app
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.path()
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.app_data_dir()
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.unwrap_or_else(|_| review_root.clone())
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.join("epub-review-editor-runtime");
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let venv_root = runtime_root.join(".venv");
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let venv_python = venv_python_path(&venv_root);
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ensure_venv(&venv_python, &venv_root)?;
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ensure_dependencies(&venv_python, &tool_root)?;
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let output = run_command(
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&venv_python.to_string_lossy(),
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&[
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server_path.to_string_lossy().to_string(),
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"--review-root".to_string(),
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review_root.to_string_lossy().to_string(),
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"--host".to_string(),
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"127.0.0.1".to_string(),
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"--port".to_string(),
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DEFAULT_PORT.to_string(),
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"--daemon".to_string(),
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"--no-browser".to_string(),
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],
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Some(&tool_root),
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)?;
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let launched_url = extract_url(&output.stdout)
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.or_else(|| find_running_editor(expected_version.as_deref(), &review_root))
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.ok_or_else(|| {
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format!(
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"审校器已启动但没有返回访问地址。\nstdout:\n{}\nstderr:\n{}",
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output.stdout, output.stderr
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)
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})?;
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let launched_url = launched_url.replace("http://localhost:", "http://127.0.0.1:");
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let session_id = ensure_session_from_path(&launched_url, epub_path.as_deref())?;
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Ok(ReviewEditorLaunchResponse {
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ok: true,
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url: launched_url,
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reused: false,
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review_root: review_root.to_string_lossy().to_string(),
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version: expected_version.unwrap_or_default(),
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session_id,
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})
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}
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fn resolve_tool_root(app: &AppHandle) -> Result<PathBuf, String> {
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if let Ok(raw) = std::env::var("READEST_REVIEW_EDITOR_TOOL_ROOT") {
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let path = PathBuf::from(raw);
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if path.join("server.py").exists() {
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return Ok(path);
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}
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}
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if let Ok(resource_dir) = app.path().resource_dir() {
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for candidate in [
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resource_dir.join("tools").join("epub-review-editor"),
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resource_dir
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.join("apps")
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.join("readest-app")
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.join("tools")
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.join("epub-review-editor"),
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] {
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if candidate.join("server.py").exists() {
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return Ok(candidate);
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}
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}
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}
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#[cfg(debug_assertions)]
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if let Ok(current) = std::env::current_dir() {
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for ancestor in current.ancestors() {
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for candidate in [
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ancestor.join("tools").join("epub-review-editor"),
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ancestor
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.join("apps")
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.join("readest-app")
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.join("tools")
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.join("epub-review-editor"),
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] {
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if candidate.join("server.py").exists() {
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return Ok(candidate);
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}
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}
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}
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}
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Err("没有找到已迁移的 EPUB 审校器资源目录。".to_string())
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}
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fn ensure_venv(venv_python: &Path, venv_root: &Path) -> Result<(), String> {
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if venv_python.exists() {
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return Ok(());
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}
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if let Some(parent) = venv_root.parent() {
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fs::create_dir_all(parent).map_err(|err| {
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format!(
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"创建审校器运行目录失败：{} ({err})",
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parent.to_string_lossy()
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)
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})?;
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}
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let python = resolve_python_command()?;
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let mut args = python.args;
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args.extend([
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"-m".to_string(),
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"venv".to_string(),
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venv_root.to_string_lossy().to_string(),
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]);
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run_command(&python.program, &args, None)?;
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Ok(())
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}
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fn ensure_dependencies(venv_python: &Path, tool_root: &Path) -> Result<(), String> {
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let check = run_command_allow_failure(
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&venv_python.to_string_lossy(),
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&[
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"-c".to_string(),
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"import importlib.util, sys; sys.exit(0 if importlib.util.find_spec('flask') else 1)"
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.to_string(),
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],
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Some(tool_root),
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)?;
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if check.0 {
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return Ok(());
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}
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let requirements = tool_root.join("requirements.txt");
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run_command(
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&venv_python.to_string_lossy(),
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&[
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"-m".to_string(),
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"pip".to_string(),
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"install".to_string(),
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"-r".to_string(),
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requirements.to_string_lossy().to_string(),
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],
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Some(tool_root),
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)?;
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Ok(())
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}
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fn venv_python_path(venv_root: &Path) -> PathBuf {
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if cfg!(windows) {
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venv_root.join("Scripts").join("python.exe")
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} else {
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venv_root.join("bin").join("python")
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}
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}
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fn resolve_python_command() -> Result<PythonCommand, String> {
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let candidates: Vec<PythonCommand> = if cfg!(windows) {
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vec![
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PythonCommand {
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program: "py".to_string(),
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args: vec!["-3".to_string()],
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},
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PythonCommand {
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program: "python".to_string(),
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args: vec![],
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},
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PythonCommand {
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program: "python3".to_string(),
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args: vec![],
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},
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]
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} else {
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vec![
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PythonCommand {
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program: "python3".to_string(),
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args: vec![],
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},
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PythonCommand {
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program: "python".to_string(),
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args: vec![],
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},
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]
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};
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for candidate in candidates {
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let mut args = candidate.args.clone();
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args.push("--version".to_string());
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if run_command_allow_failure(&candidate.program, &args, None)
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.map(|(ok, _)| ok)
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.unwrap_or(false)
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{
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return Ok(candidate);
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}
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}
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Err("没有找到 Python 3。请先安装 Python 3，然后重新打开 EPUB 审校器。".to_string())
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}
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fn read_expected_version(tool_root: &Path) -> Option<String> {
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let text = fs::read_to_string(tool_root.join("version.py")).ok()?;
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let marker = "version = \"";
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let start = text.find(marker)? + marker.len();
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let rest = &text[start..];
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Some(rest[..rest.find('"')?].to_string())
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}
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fn find_running_editor(expected_version: Option<&str>, review_root: &Path) -> Option<String> {
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let expected_root = review_root
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.canonicalize()
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.unwrap_or_else(|_| review_root.to_path_buf());
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for port in DEFAULT_PORT..(DEFAULT_PORT + PORT_SCAN_LIMIT) {
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let Some(payload) = request_json(port, "/api/version") else {
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continue;
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};
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let Some(version) = payload.get("version").and_then(Value::as_str) else {
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continue;
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};
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if expected_version.map_or(true, |expected| expected == version) {
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let running_root = payload
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.get("review_root")
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.and_then(Value::as_str)
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.map(PathBuf::from);
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let running_root_matches = running_root
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.as_ref()
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.and_then(|path| path.canonicalize().ok())
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.map(|path| path == expected_root)
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.unwrap_or(false);
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if !running_root_matches {
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continue;
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}
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return Some(format!("http://127.0.0.1:{port}"));
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}
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}
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None
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}
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fn request_json(port: u16, path: &str) -> Option<Value> {
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let addr = SocketAddr::from(([127, 0, 0, 1], port));
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let mut stream = TcpStream::connect_timeout(&addr, Duration::from_millis(250)).ok()?;
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let _ = stream.set_read_timeout(Some(Duration::from_millis(800)));
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let _ = stream.set_write_timeout(Some(Duration::from_millis(800)));
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let request = format!("GET {path} HTTP/1.1\r\nHost: 127.0.0.1\r\nConnection: close\r\n\r\n");
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stream.write_all(request.as_bytes()).ok()?;
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read_http_json_response(stream)
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}
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fn post_json(url: &str, path: &str, body: &str) -> Result<Value, String> {
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let port = parse_loopback_port(url)?;
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let addr = SocketAddr::from(([127, 0, 0, 1], port));
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let mut stream = TcpStream::connect_timeout(&addr, Duration::from_secs(3))
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.map_err(|err| format!("连接审校器失败：{err}"))?;
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let _ = stream.set_read_timeout(Some(Duration::from_secs(30)));
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let _ = stream.set_write_timeout(Some(Duration::from_secs(5)));
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let request = format!(
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"POST {path} HTTP/1.1\r\nHost: 127.0.0.1\r\nContent-Type: application/json\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}",
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body.len(),
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body
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);
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stream
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.write_all(request.as_bytes())
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.map_err(|err| format!("写入审校器请求失败：{err}"))?;
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read_http_json_response_result(stream)
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}
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fn read_http_json_response(mut stream: TcpStream) -> Option<Value> {
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let mut response = String::new();
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stream.read_to_string(&mut response).ok()?;
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if !response.starts_with("HTTP/1.1 200") && !response.starts_with("HTTP/1.0 200") {
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return None;
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}
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let body = response.split("\r\n\r\n").nth(1)?;
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serde_json::from_str(body).ok()
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}
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fn read_http_json_response_result(mut stream: TcpStream) -> Result<Value, String> {
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let mut response = String::new();
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stream
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.read_to_string(&mut response)
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.map_err(|err| format!("读取审校器响应失败：{err}"))?;
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let status_line = response.lines().next().unwrap_or_default().to_string();
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let body = response.split("\r\n\r\n").nth(1).unwrap_or("");
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let payload = serde_json::from_str::<Value>(body).unwrap_or(Value::Null);
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if status_line.starts_with("HTTP/1.1 200") || status_line.starts_with("HTTP/1.0 200") {
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if payload.is_null() {
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return Err("审校器返回了空响应。".to_string());
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}
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return Ok(payload);
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}
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let message = payload
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.get("error")
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.and_then(Value::as_str)
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.unwrap_or(status_line.as_str());
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Err(message.to_string())
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}
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fn parse_loopback_port(url: &str) -> Result<u16, String> {
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let rest = url
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.strip_prefix("http://127.0.0.1:")
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.or_else(|| url.strip_prefix("http://localhost:"))
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.ok_or_else(|| format!("审校器地址不是本机 HTTP 地址：{url}"))?;
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let port_text = rest.split('/').next().unwrap_or(rest);
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port_text
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.parse::<u16>()
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.map_err(|err| format!("无法解析审校器端口：{port_text} ({err})"))
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}
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fn ensure_session_from_path(url: &str, epub_path: Option<&str>) -> Result<Option<String>, String> {
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let Some(raw_path) = epub_path.map(str::trim).filter(|value| !value.is_empty()) else {
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return Ok(None);
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};
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let body = serde_json::json!({ "epub_path": raw_path, "activate": false }).to_string();
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let payload = post_json(url, "/api/session/from-path", &body)?;
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Ok(payload
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.get("id")
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.and_then(Value::as_str)
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.map(ToOwned::to_owned))
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}
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fn run_command(
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program: &str,
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args: &[String],
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cwd: Option<&Path>,
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) -> Result<CommandOutput, String> {
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let (ok, output) = run_command_allow_failure(program, args, cwd)?;
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if ok {
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Ok(output)
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} else {
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Err(format!(
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"命令执行失败：{} {}\nstdout:\n{}\nstderr:\n{}",
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program,
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args.join(" "),
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output.stdout,
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output.stderr
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))
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}
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}
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fn run_command_allow_failure(
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program: &str,
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args: &[String],
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cwd: Option<&Path>,
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) -> Result<(bool, CommandOutput), String> {
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let mut command = Command::new(program);
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command.args(args);
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if let Some(cwd) = cwd {
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command.current_dir(cwd);
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}
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command.stdin(std::process::Stdio::null());
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hide_command_window(&mut command);
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let output = command
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.output()
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.map_err(|err| format!("无法执行命令 {program}: {err}"))?;
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Ok((
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output.status.success(),
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CommandOutput {
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stdout: String::from_utf8_lossy(&output.stdout).to_string(),
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stderr: String::from_utf8_lossy(&output.stderr).to_string(),
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},
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))
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}
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#[cfg(windows)]
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fn hide_command_window(command: &mut Command) {
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use std::os::windows::process::CommandExt;
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const CREATE_NO_WINDOW: u32 = 0x08000000;
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command.creation_flags(CREATE_NO_WINDOW);
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}
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|
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#[cfg(not(windows))]
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fn hide_command_window(_command: &mut Command) {}
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|
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fn extract_url(text: &str) -> Option<String> {
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text.split_whitespace()
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.find(|part| part.starts_with("http://") || part.starts_with("https://"))
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.map(ToOwned::to_owned)
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}
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