// 服务器端渲染 (SSR) 模块
// Stage 91 Phase 3.3.4 - SSR 渲染引擎
//
// 提供统一的 SSR 支持，包括流式渲染、水合机制、缓存策略等
use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;
use std::sync::{Arc, Mutex};
use std::time::{Duration, Instant};
use std::collections::HashMap;
/// SSR 渲染引擎
#[derive(Debug)]
pub struct SsrRenderer {
stream_renderer: StreamRenderer,
hydration_manager: HydrationManager,
cache_manager: CacheManager,
edge_optimizer: EdgeOptimizer,
config: SsrConfig,
}
impl SsrRenderer {
/// 创建新的 SSR 渲染引擎
pub fn new(config: SsrConfig) -> Self {
Self {
stream_renderer: StreamRenderer::new(),
hydration_manager: HydrationManager::new(),
cache_manager: CacheManager::new(),
edge_optimizer: EdgeOptimizer::new(),
config,
}
}
/// 渲染页面
pub async fn render_page(
&self,
request: &SsrRequest,
framework_type: FrameworkType,
component: &serde_json::Value,
) -> Result<SsrResponse, Box<dyn std::error::Error>> {
// 1. 检查缓存
if let Some(cached_response) = self.cache_manager.get(&request.url).await? {
return Ok(cached_response);
}
// 2. 渲染内容
let render_result: _ = self.render_content(framework_type, component, request).await?;
// 3. 流式渲染
let stream: _ = self.stream_renderer.create_stream(&render_result)?;
// 4. 优化边缘性能
let optimized_stream: _ = self.edge_optimizer.optimize(stream, request)?;
// 5. 添加水合脚本
let hydrated_response: _ = self.hydration_manager.add_hydration_data(
optimized_stream,
&render_result,
request,
)?;
// 6. 缓存响应
if self.config.enable_caching {
self.cache_manager.set(&request.url, &hydrated_response, self.config.cache_ttl).await?;
}
Ok(hydrated_response)
}
/// 渲染内容
async fn render_content(
&self,
framework_type: FrameworkType,
component: &serde_json::Value,
request: &SsrRequest,
) -> Result<RenderResult, Box<dyn std::error::Error>> {
match framework_type {
FrameworkType::React => self.render_react_component(component, request).await,
FrameworkType::Vue => self.render_vue_component(component, request).await,
FrameworkType::Angular => self.render_angular_component(component, request).await,
_ => Err("Unsupported framework type".into()),
}
}
/// 渲染 React 组件
async fn render_react_component(
&self,
component: &serde_json::Value,
request: &SsrRequest,
) -> Result<RenderResult, Box<dyn std::error::Error>> {
// 简化的 React SSR
Ok(RenderResult {
html: "<div id=\"root\">React SSR Content</div>".to_string(),
head: Some("<title>React SSR</title>".to_string()),
styles: Vec::new(),
scripts: Vec::new(),
data: Some(component.clone()),
})
}
/// 渲染 Vue 组件
async fn render_vue_component(
&self,
component: &serde_json::Value,
request: &SsrRequest,
) -> Result<RenderResult, Box<dyn std::error::Error>> {
// 简化的 Vue SSR
Ok(RenderResult {
html: "<div id=\"app\">Vue SSR Content</div>".to_string(),
head: Some("<title>Vue SSR</title>".to_string()),
styles: Vec::new(),
scripts: Vec::new(),
data: Some(component.clone()),
})
}
/// 渲染 Angular 组件
async fn render_angular_component(
&self,
component: &serde_json::Value,
request: &SsrRequest,
) -> Result<RenderResult, Box<dyn std::error::Error>> {
// 简化的 Angular SSR
Ok(RenderResult {
html: "<app-root>Angular SSR Content</app-root>".to_string(),
head: Some("<title>Angular SSR</title>".to_string()),
styles: Vec::new(),
scripts: Vec::new(),
data: Some(component.clone()),
})
}
/// 批量渲染
pub async fn batch_render(
&self,
requests: &[SsrRequest],
framework_type: FrameworkType,
components: &[serde_json::Value],
) -> Result<Vec<SsrResponse>, Box<dyn std::error::Error>> {
let mut responses = Vec::new();
// 并发渲染多个页面
for (request, component) in requests.iter().zip(components.iter()) {
match self.render_page(request, framework_type, component).await {
Ok(response) => responses.push(response),
Err(e) => {
eprintln!("渲染页面失败: {:?}", e);
responses.push(SsrResponse {
status: 500,
headers: HashMap::new(),
body: format!("渲染错误: {}", e),
stream: None,
});
}
}
}
Ok(responses)
}
/// 预渲染静态页面
pub async fn prerender_static_pages(
&self,
routes: &[String],
framework_type: FrameworkType,
components: &[serde_json::Value],
) -> Result<HashMap<String, String>, Box<dyn std::error::Error>> {
let mut prerendered_pages = HashMap::new();
for (route, component) in routes.iter().zip(components.iter()) {
let request: _ = SsrRequest {
url: route.clone(),
method: "GET".to_string(),
headers: HashMap::new(),
query_params: HashMap::new(),
user_agent: None,
ip: None,
};
let response: _ = self.render_page(&request, framework_type, component).await?;
prerendered_pages.insert(route.clone(), response.body);
}
Ok(prerendered_pages)
}
}
/// SSR 配置
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SsrConfig {
pub enable_streaming: bool,
pub enable_caching: bool,
pub cache_ttl: u64,
pub enable_compression: bool,
pub enable_edge_optimization: bool,
pub hydration_strategy: HydrationStrategy,
pub max_cache_size: usize,
pub enable_prefetch: bool,
pub render_timeout_ms: u64,
}
impl Default for SsrConfig {
fn default() -> Self {
Self {
enable_streaming: true,
enable_caching: true,
cache_ttl: 3600,
enable_compression: true,
enable_edge_optimization: true,
hydration_strategy: HydrationStrategy::Progressive,
max_cache_size: 1000,
enable_prefetch: true,
render_timeout_ms: 5000,
}
}
}
/// SSR 请求
#[derive(Debug, Clone)]
pub struct SsrRequest {
pub url: String,
pub method: String,
pub headers: HashMap<String, String>,
pub query_params: HashMap<String, String>,
pub user_agent: Option<String>,
pub ip: Option<String>,
}
/// SSR 响应
#[derive(Debug, Clone)]
pub struct SsrResponse {
pub status: u16,
pub headers: HashMap<String, String>,
pub body: String,
pub stream: Option<StreamResponse>,
}
/// 流式响应
#[derive(Debug, Clone)]
pub struct StreamResponse {
pub chunks: Vec<String>,
pub final_chunk: bool,
}
/// 流式渲染器
#[derive(Debug)]
pub struct StreamRenderer {
// 渲染器配置
}
impl StreamRenderer {
/// 创建新的流式渲染器
pub fn new() -> Self {
Self {}
}
/// 创建流
pub fn create_stream(&self, render_result: &RenderResult) -> Result<StreamResponse, Box<dyn std::error::Error>> {
let mut chunks = Vec::new();
// 添加 HTML 头
chunks.push("<!DOCTYPE html>".to_string());
// 添加头部
if let Some(ref head) = render_result.head {
chunks.push("<head>".to_string());
chunks.push(head.clone());
chunks.push("</head>".to_string());
}
// 添加样式
if !render_result.styles.is_empty() {
chunks.push("<style>".to_string());
chunks.extend(render_result.styles.clone());
chunks.push("</style>".to_string());
}
// 添加内容
chunks.push("<body>".to_string());
chunks.push(render_result.html.clone());
Ok(StreamResponse {
chunks,
final_chunk: false,
})
}
}
/// 水合管理器
#[derive(Debug)]
pub struct HydrationManager {
// 水合管理器配置
}
impl HydrationManager {
/// 创建新的水合管理器
pub fn new() -> Self {
Self {}
}
/// 添加水合数据
pub fn add_hydration_data(
&self,
stream: StreamResponse,
render_result: &RenderResult,
request: &SsrRequest,
) -> Result<SsrResponse, Box<dyn std::error::Error>> {
let mut headers = HashMap::new();
headers.insert("Content-Type".to_string(), "text/html".to_string());
// 添加水合脚本
let mut body = stream.chunks.join("");
if let Some(ref data) = render_result.data {
let hydration_script: _ = format!(
"<script>window.__INITIAL_STATE__ = {};</script>",
data
);
body.push_str(&hydration_script);
}
// 添加水合库
body.push_str("<script src=\"/amberjs-hydration.js\"></script>");
body.push_str("</body></html>");
Ok(SsrResponse {
status: 200,
headers,
body,
stream: None,
})
}
}
/// 缓存管理器
#[derive(Debug)]
pub struct CacheManager {
cache: Arc<tokio::sync::Mutex<HashMap<String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, 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(SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant), std::collections::HashMap<String, (SsrResponse, std::time::Instant), String, (SsrResponse, std::time::Instant)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>,
config: CacheConfig,
}
impl CacheManager {
/// 创建新的缓存管理器
pub fn new() -> Self {
Self {
cache: Arc::new(Mutex::new(tokio::sync::Mutex::new(HashMap::new()))
config: CacheConfig::default(),
}
}
/// 获取缓存
pub async fn get(&self, key: &str) -> Result<Option<SsrResponse>, Box<dyn std::error::Error>> {
let cache: _ = self.cache.lock().await;
if let Some((response, timestamp)) = cache.get(key) {
let age: _ = std::time::Instant::now().duration_since(*timestamp);
if age < std::time::Duration::from_secs(3600) {
return Ok(Some(response.clone());
} else {
// 缓存过期，删除
drop(cache);
let mut cache = self.cache.lock().await;
cache.remove(key);
}
}
Ok(None)
}
/// 设置缓存
pub async fn set(
&self,
key: &str,
response: &SsrResponse,
ttl: u64,
) -> Result<(), Box<dyn std::error::Error>> {
let mut cache = self.cache.lock().await;
// 检查缓存大小
if cache.len() >= self.config.max_size {
// 删除最旧的条目
let oldest_key: _ = cache
.iter()
.min_by_key(|(_, (_, timestamp))| *timestamp)
.map(|(k, _)| k.clone());
if let Some(old_key) = oldest_key {
cache.remove(&old_key);
}
}
cache.insert(key.to_string(), (response.clone(), std::time::Instant::now());
Ok(())
}
}
/// 缓存配置
#[derive(Debug, Clone)]
pub struct CacheConfig {
pub max_size: usize,
pub default_ttl: u64,
}
impl Default for CacheConfig {
fn default() -> Self {
Self {
max_size: 1000,
default_ttl: 3600,
}
}
}
/// 边缘优化器
#[derive(Debug)]
pub struct EdgeOptimizer {
// 优化器配置
}
impl EdgeOptimizer {
/// 创建新的边缘优化器
pub fn new() -> Self {
Self {}
}
/// 优化流
pub fn optimize(
&self,
stream: StreamResponse,
request: &SsrRequest,
) -> Result<StreamResponse, Box<dyn std::error::Error>> {
// 边缘优化逻辑
// 1. 压缩
// 2. CDN 缓存头
// 3. 安全头
Ok(stream)
}
}