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tsuki 2025-07-22 21:24:34 +08:00
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12
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@ -0,0 +1,12 @@
[package]
name = "mapp"
version = "0.1.0"
edition = "2024"
[dependencies]
axum = "0.8.4"
serde = { version = "1.0.219", features = ["derive"] }
tokio = { version = "1.46.1", features = ["full"] }
tower-http = { version = "0.6.0", features = ["cors"] }
tracing = "0.1.40"
tracing-subscriber = "0.3.19"

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# 瓦片服务器 (Tile Server)
基于 Axum 的高性能瓦片服务器,支持通过时间参数动态加载不同时次的瓦片数据。
## 功能特性
- ✅ 支持时间参数动态加载瓦片
- ✅ 标准 XYZ 瓦片格式支持
- ✅ 高性能异步文件读取
- ✅ 适当的 HTTP 缓存头设置
- ✅ 完整的错误处理
- ✅ CORS 支持
## 目录结构
```
tiles/
└── 202507220000/ ← 时次目录YYYYMMDDHHMM
└── {z}/{x}/{y}.png
└── 202507220006/
└── {z}/{x}/{y}.png
```
## API 接口
### 获取瓦片
**请求**
```
GET /tiles/{z}/{x}/{y}.png?time={time}
```
**参数说明**
- `z`: 缩放级别 (u8)
- `x`: X 坐标 (u32)
- `y`: Y 坐标 (u32)
- `time`: 时间参数,格式为 YYYYMMDDHHMM (12位数字)
**响应**
- `200 OK` - 返回 PNG 图像数据
- `400 Bad Request` - 参数错误
- `404 Not Found` - 瓦片文件不存在
**示例请求**
```bash
curl "http://localhost:3050/tiles/6/42/20.png?time=202507220006"
```
## 快速开始
### 1. 编译运行
```bash
cargo run
```
### 2. 测试 API
访问根路径查看服务状态:
```bash
curl http://localhost:3050/
```
获取示例瓦片:
```bash
curl "http://localhost:3050/tiles/6/42/20.png?time=202507220006"
```
### 3. 创建瓦片数据
按照以下目录结构组织您的瓦片文件:
```bash
mkdir -p tiles/202507220000/6/42
# 将您的瓦片文件放入相应目录
cp your-tile.png tiles/202507220000/6/42/20.png
```
## 配置说明
- **端口**: 3050 (可在 main.rs 中修改)
- **绑定地址**: 0.0.0.0 (监听所有网络接口)
- **缓存策略**: 1小时 (public, max-age=3600)
## 错误处理
服务器会返回详细的错误信息:
- 缺少时间参数: `400 Bad Request`
- 时间格式无效: `400 Bad Request`
- 瓦片不存在: `404 Not Found`
- 服务器错误: `500 Internal Server Error`
## 开发说明
### 项目结构
```
src/
└── main.rs # 主服务器代码
Cargo.toml # 依赖配置
README.md # 项目说明
tiles/ # 瓦片数据目录
```
### 核心依赖
- `axum`: Web 框架
- `tokio`: 异步运行时
- `tower-http`: HTTP 中间件 (CORS)
- `tracing`: 日志记录
### 扩展建议
- 添加瓦片格式验证
- 实现瓦片缓存机制
- 支持多种图像格式
- 添加访问日志
- 实现配置文件支持

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use axum::{
Router,
extract::{Path, Query},
http::{StatusCode, header},
response::{IntoResponse, Response},
routing::get,
};
use std::collections::HashMap;
use tokio::fs;
use tower_http::cors::{Any, CorsLayer};
#[tokio::main]
async fn main() {
// 初始化日志
tracing_subscriber::fmt::init();
// 配置更精确的CORS
let cors = CorsLayer::new()
.allow_origin(Any) // 允许所有来源,也可以指定特定域名
.allow_methods([axum::http::Method::GET]) // 只允许GET请求
.allow_headers([axum::http::header::CONTENT_TYPE]); // 允许的头部
// 构建应用路由
let app = Router::new()
.route("/", get(root))
.route("/tiles/{z}/{x}/{y}", get(get_tile))
.layer(cors); // 使用配置好的CORS
// 启动服务器,监听端口 3050
let listener = tokio::net::TcpListener::bind("0.0.0.0:3050").await.unwrap();
println!("瓦片服务器启动成功,监听地址: http://0.0.0.0:3050");
println!("API 示例: GET /tiles/6/42/20.png?time=202507220006");
axum::serve(listener, app).await.unwrap();
}
// 根路径处理器
async fn root() -> &'static str {
"瓦片服务器运行中!\n\n使用方式:\nGET /tiles/{z}/{x}/{y}.png?time=YYYYMMDDHHMM\n\n示例:\nGET /tiles/6/42/20.png?time=202507220006"
}
// 瓦片处理器
async fn get_tile(
Path((z, x, y)): Path<(String, String, String)>,
Query(params): Query<HashMap<String, String>>,
) -> Result<Response, TileError> {
// 解析时间参数
let time = params.get("time").ok_or(TileError::MissingTimeParameter)?;
// 验证时间格式YYYYMMDDHHMM12位数字
if time.len() != 12 || !time.chars().all(|c| c.is_ascii_digit()) {
return Err(TileError::InvalidTimeFormat);
}
// 构建文件路径
let file_path = format!("tiles/{}/{}/{}/{}.png", time, z, x, y);
// 异步读取文件
match fs::read(&file_path).await {
Ok(file_data) => {
// 创建响应,设置正确的 Content-Type 和缓存头
let response = Response::builder()
.status(StatusCode::OK)
.header(header::CONTENT_TYPE, "image/png")
.header(header::CACHE_CONTROL, "public, max-age=3600") // 缓存1小时
.header(header::ETAG, format!("\"{}\"", generate_etag(&file_path)))
.body(file_data.into())
.map_err(|_| TileError::InternalServerError)?;
Ok(response)
}
Err(_) => {
tracing::warn!("瓦片文件不存在: {}", file_path);
Err(TileError::TileNotFound)
}
}
}
// 生成简单的 ETag
fn generate_etag(path: &str) -> String {
use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
let mut hasher = DefaultHasher::new();
path.hash(&mut hasher);
format!("{:x}", hasher.finish())
}
// 错误类型定义
#[derive(Debug)]
enum TileError {
MissingTimeParameter,
InvalidTimeFormat,
TileNotFound,
InternalServerError,
}
// 错误响应实现
impl IntoResponse for TileError {
fn into_response(self) -> Response {
let (status, error_message) = match self {
TileError::MissingTimeParameter => (
StatusCode::BAD_REQUEST,
"缺少时间参数。请使用 ?time=YYYYMMDDHHMM 格式",
),
TileError::InvalidTimeFormat => (
StatusCode::BAD_REQUEST,
"时间格式无效。请使用 YYYYMMDDHHMM 格式12位数字",
),
TileError::TileNotFound => (StatusCode::NOT_FOUND, "瓦片文件不存在"),
TileError::InternalServerError => (StatusCode::INTERNAL_SERVER_ERROR, "服务器内部错误"),
};
tracing::error!("瓦片服务错误: {:?}", self);
(status, error_message).into_response()
}
}