init: 0.1.0

feat: 基本功能有了
  1. 分片上传
  2. code 回显
  3. 下载
todo: 断点上传

frontend/src/api/upload.ts

@@ -0,0 +1,76 @@
+import { useState } from 'react';
+
+interface UploadRes {
+    code: string
+}
+
+export const useFileUpload = () => {
+    const [progress, setProgress] = useState(0);
+    const [loading, setLoading] = useState(false);
+    const [error, setError] = useState<string | null>(null);
+
+    const uploadFile = async (file: File): Promise<string> => {
+        setLoading(true);
+        setError(null);
+        setProgress(0);
+
+        try {
+            console.log(`[D] api.Upload: upload file = ${file.name}, size = ${file.size}`, file);
+            const url = `/api/share/${file.name}`;
+
+            // 1. 初始化上传
+            const res1 = await fetch(url, {
+                method: "PUT",
+                headers: {"X-File-Size": file.size.toString()}
+            });
+
+            if (!res1.ok) {
+                throw new Error("上传失败<1>");
+            }
+
+            const j1 = await res1.json() as UploadRes;
+            if (!j1.code) {
+                throw new Error("上传失败<2>");
+            }
+
+            // 2. 准备分片上传
+            const CHUNK_SIZE = 1024 * 1024;
+            const totalChunks = Math.ceil(file.size / CHUNK_SIZE);
+            const code = j1.code;
+
+            // 3. 上传分片
+            for (let chunkIndex = 0; chunkIndex < totalChunks; chunkIndex++) {
+                const start = chunkIndex * CHUNK_SIZE;
+                const end = Math.min(start + CHUNK_SIZE, file.size);
+                const chunk = file.slice(start, end);
+
+                const res = await fetch(`/api/share/${code}`, {
+                    method: "POST",
+                    headers: {
+                        "Range": `bytes=${start}-${end - 1}`,
+                        "Content-Type": "application/octet-stream"
+                    },
+                    body: chunk
+                });
+
+                if (!res.ok) {
+                    const err = await res.text();
+                    throw new Error(`上传失败<3>: ${err}`);
+                }
+
+                // 更新进度
+                // const currentProgress = Number(((chunkIndex + 1) / totalChunks * 100).toFixed(2)); // 小数
+                const currentProgress = Math.round(((chunkIndex + 1) / totalChunks) * 100); // 整数 0-100
+                setProgress(currentProgress);
+            }
+
+            return code;
+        } catch (err) {
+            throw err; // 将错误继续抛出以便组件处理
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    return { uploadFile, progress, loading, error };
+};