fix: make case material downloads deployment-safe

src/views/components/TrainingMaterialButton.vue

@@ -25,24 +25,44 @@ const material = computed(() => {
   const name = String(props.materialName || "").trim();
   const url = String(props.materialUrl || "").trim();
   if (!name || !url || (name === "案例资料.rar" && url === "/file/example.rar")) return null;
-  return { name, url };
+  return { name, url: normalizeMaterialUrl(url) };
 });
 const extension = computed(() => String(material.value?.name || material.value?.url || "").split(/[?#]/)[0].split(".").pop().toLowerCase());
 const isImage = computed(() => ["jpg", "jpeg", "png", "gif", "webp", "bmp", "svg"].includes(extension.value));
 const isPdf = computed(() => extension.value === "pdf");
 const previewable = computed(() => isImage.value || isPdf.value);
 
-function handleDownload() {
+function normalizeMaterialUrl(rawUrl) {
+  const url = String(rawUrl || "").trim();
+  if (!url) return "";
+  try {
+    const parsed = new URL(url);
+    if (["localhost", "127.0.0.1", "::1"].includes(parsed.hostname) && parsed.pathname.startsWith("/file/")) {
+      return `${parsed.pathname}${parsed.search}${parsed.hash}`;
+    }
+  } catch {
+    // Relative file paths are already resolved through the current deployment or Vite proxy.
+  }
+  return url;
+}
+
+async function handleDownload() {
   if (!material.value?.url) { ElMessage.warning("暂无案例资料"); return; }
-  const link = document.createElement("a");
-  link.href = material.value.url;
-  link.target = "_blank";
-  link.rel = "noopener";
-  link.download = material.value.name;
-  document.body.appendChild(link);
-  link.click();
-  document.body.removeChild(link);
-  if (!previewable.value) ElMessage.info("该文件类型暂不支持在线预览，已为您打开下载。");
+  try {
+    const response = await fetch(material.value.url);
+    if (!response.ok) throw new Error(`HTTP ${response.status}`);
+    const objectUrl = URL.createObjectURL(await response.blob());
+    const link = document.createElement("a");
+    link.href = objectUrl;
+    link.download = material.value.name;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+    URL.revokeObjectURL(objectUrl);
+  } catch (error) {
+    console.warn("Case material download failed", error);
+    ElMessage.error("案例资料文件不存在或暂不可下载，请联系管理员重新上传。");
+  }
 }
 </script>
 

tests/training-material.static.test.cjs

@@ -8,6 +8,7 @@ const studentPage = fs.readFileSync(path.join(root, "src/views/training/GenericT
 const newProductSurveyPage = fs.readFileSync(path.join(root, "src/views/foundation/new-product-survey.vue"), "utf8");
 const productDevelopmentFactorsPage = fs.readFileSync(path.join(root, "src/views/foundation/product-development-factors.vue"), "utf8");
 const trainingIntro = fs.readFileSync(path.join(root, "src/views/components/TrainingIntro.vue"), "utf8");
+const materialButton = fs.readFileSync(path.join(root, "src/views/components/TrainingMaterialButton.vue"), "utf8");
 const directStudentBriefFiles = [
   "src/views/demand/index.vue",
   "src/views/demand/environment.vue",
@@ -47,6 +48,35 @@ assert(
   /TrainingMaterialButton/.test(productDevelopmentFactorsPage),
   "product development factors page should render the case material button"
 );
+assert.match(
+  materialButton,
+  /function normalizeMaterialUrl\(rawUrl\)/,
+  "case material downloads must normalize legacy absolute URLs"
+);
+assert.ok(
+  materialButton.includes('["localhost", "127.0.0.1", "::1"]'),
+  "localhost case material URLs must not be sent to each student's own browser port"
+);
+assert.match(
+  materialButton,
+  /url: normalizeMaterialUrl\(url\)/,
+  "the download button must use the normalized material URL"
+);
+assert.match(
+  materialButton,
+  /async function handleDownload\(\)/,
+  "case material downloads must validate the file response before opening a download"
+);
+assert.match(
+  materialButton,
+  /await fetch\(material\.value\.url\)/,
+  "case material downloads must request the configured file URL"
+);
+assert.match(
+  materialButton,
+  /案例资料文件不存在或暂不可下载/,
+  "a missing case material file must show a clear recovery message"
+);
 
 const studentBriefPages = [studentPage, newProductSurveyPage, productDevelopmentFactorsPage, trainingIntro, ...directStudentBriefPages];
 assert(/实训背景/.test(trainingTaskBrief) && /实训目标/.test(trainingTaskBrief) && /实训要求/.test(trainingTaskBrief), "common TrainingTaskBrief component should render the three student brief sections");