first commit

modules/downloader/static/app.js

@@ -0,0 +1,79 @@
+'use strict';
+const $ = id => document.getElementById(id);
+let token = '', running = false, starting = false, loadingChannels = false, loadedKey = '', lastLog = -1;
+const labels = {idle:'等待开始',running:'下载中',completed:'已完成',partial:'未达到目标',cancelled:'已停止',error:'任务中断'};
+const key = () => $('key').value.trim();
+function controls() {
+  const busy = running || starting;
+  $('start').disabled = busy || !loadedKey || loadedKey !== key() || !$('channel').value;
+  $('stop').disabled = !running;
+  $('channels').disabled = busy || loadingChannels;
+  for (const id of ['key','channel','target']) $(id).disabled = busy || (id === 'channel' && !loadedKey);
+}
+async function post(path, body) {
+  const response = await fetch('/api/' + path, {method:'POST',headers:{'Content-Type':'application/json','X-Session-Token':token},body:JSON.stringify(body)});
+  const data = await response.json();
+  if (!response.ok) throw new Error(data.error || '请求失败');
+  return data;
+}
+$('key').addEventListener('input', () => {loadedKey=''; $('channel').replaceChildren(new Option('请重新获取频道','')); controls();});
+$('channels').addEventListener('click', async () => {
+  loadingChannels=true; controls(); $('notice').textContent='正在获取频道…';
+  const submittedKey = key();
+  try {
+    const data = await post('channels',{key:submittedKey});
+    if (key() !== submittedKey) return;
+    $('channel').replaceChildren(...data.channels.map(c => new Option(c,c)));
+    loadedKey=submittedKey; $('notice').textContent=`已获取 ${data.channels.length} 个频道。`;
+    $('debug-channel').value=$('channel').value;
+  } catch(error) {$('notice').textContent=error.message;}
+  finally {loadingChannels=false; controls();}
+});
+$('channel').addEventListener('change', () => {$('debug-channel').value=$('channel').value; controls();});
+$('download-form').addEventListener('submit', async event => {
+  event.preventDefault(); starting=true; controls(); $('notice').textContent='';
+  try {await post('start',{key:key(),channel:$('channel').value,target:Number($('target').value)}); await refresh();}
+  catch(error) {$('notice').textContent=error.message;}
+  finally {starting=false; controls();}
+});
+$('stop').addEventListener('click', async () => {
+  $('stop').disabled=true;
+  try {await post('stop',{}); $('notice').textContent='正在停止，等待当前请求或文章保存结束…';}
+  catch(error) {$('notice').textContent=error.message;}
+});
+$('debug-form').addEventListener('submit', async event => {
+  event.preventDefault(); $('debug-submit').disabled=true; $('debug-output').textContent='正在请求…';
+  try {
+    const data=await post('debug',{key:key(),endpoint:$('endpoint').value,channel:$('debug-channel').value,num:Number($('debug-num').value),start:Number($('debug-start').value)});
+    const output=JSON.stringify(data,null,2);
+    $('debug-output').textContent=output.slice(0,100000)+(output.length>100000?'\n…输出超过 100000 字符，已截断。':'');
+  } catch(error) {$('debug-output').textContent=error.message;}
+  finally {$('debug-submit').disabled=false;}
+});
+async function refresh() {
+  const response=await fetch('/api/state');
+  if (!response.ok) throw new Error('无法读取下载状态');
+  const data=await response.json();
+  running=data.status==='running'; controls();
+  const percent=data.target ? Math.floor(data.saved/data.target*100) : 0;
+  $('status').textContent=labels[data.status] || data.status;
+  $('progress-text').textContent=`下载新闻 ${data.saved}/${data.target} 条`;
+  $('percent').textContent=`已完成 ${percent}%`; $('progress').value=percent;
+  for (const id of ['saved','skipped','failed','requests','message','output']) $(id).textContent=data[id];
+  const latest=data.logs.length ? data.logs[data.logs.length-1].id : 0;
+  if (latest!==lastLog) {
+    const logs=$('logs'); const bottom=logs.scrollHeight-logs.scrollTop-logs.clientHeight<40;
+    logs.replaceChildren(...data.logs.map(log => {const row=document.createElement('div'); const stamp=document.createElement('time'); stamp.textContent=log.time; row.append(stamp,document.createTextNode(log.message)); return row;}));
+    if (bottom) logs.scrollTop=logs.scrollHeight;
+    lastLog=latest;
+  }
+}
+async function poll() {
+  try {await refresh();}
+  catch(error) {$('notice').textContent='与本地服务连接中断，请检查启动窗口。';}
+  setTimeout(poll,700);
+}
+(async () => {
+  try {const response=await fetch('/api/session'); token=(await response.json()).token; await poll();}
+  catch(error) {$('notice').textContent='初始化失败，请刷新页面。';}
+})();