FeedLite 初始提交:通用轻量级反馈系统(PHP + SQLite,零依赖)

- 前台:问题列表 / 详情 / 发布与回复(趣味问答验证码、蜜罐、IP 限流)
- 后台:先审后显、站点设置(站点标题/描述、附件存储、OSS 参数)、操作日志
- 附件:关闭 / 本机硬盘 / 阿里云 OSS 浏览器直传(ECS 实例 RAM 角色)三种模式
- 品牌资源:全套图标(favicon.ico / SVG / PNG 各尺寸 / manifest)
- 安全:CSRF、session 加固、.htaccess 屏蔽敏感文件、口令仅存哈希
- 配置:config.example.php 为模板,config.php 不入库
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/* FeedLite · 轻反馈 —— 轻量交互(含图片/视频直传 OSS) */
(function () {
'use strict';
/* ---------- 公共小工具 ---------- */
function $(sel, root) { return (root || document).querySelector(sel); }
function $$(sel, root) {
var out = [], list = (root || document).querySelectorAll(sel);
for (var i = 0; i < list.length; i++) { out.push(list[i]); }
return out;
}
function qs(obj) {
var parts = [];
for (var k in obj) {
if (obj.hasOwnProperty(k) && obj[k] !== undefined && obj[k] !== null) {
parts.push(encodeURIComponent(k) + '=' + encodeURIComponent(obj[k]));
}
}
return parts.join('&');
}
function human(bytes) {
var b = Number(bytes) || 0;
if (b < 1024) { return b + ' B'; }
if (b < 1048576) { return (b / 1024).toFixed(1) + ' KB'; }
return (b / 1048576).toFixed(1) + ' MB';
}
function extByMime(mime) {
if (mime === 'image/webp') { return 'webp'; }
if (mime === 'image/png') { return 'png'; }
if (mime === 'image/gif') { return 'gif'; }
if (mime === 'video/mp4') { return 'mp4'; }
if (mime === 'video/quicktime') { return 'mov'; }
if (mime === 'video/webm') { return 'webm'; }
return 'jpg';
}
function renameExt(name, mime) {
var base = String(name || 'file').replace(/\.[A-Za-z0-9]{1,8}$/, '') || 'file';
return base + '.' + extByMime(mime);
}
/* ---------- 换一题:AJAX 刷新验证题,不丢失已填内容 ---------- */
function bindCaptchaRefresh() {
var links = document.querySelectorAll('[data-captcha-refresh]');
for (var i = 0; i < links.length; i++) {
links[i].addEventListener('click', function (e) {
e.preventDefault();
var box = this.closest('.captcha-line');
var qEl = box ? box.querySelector('.c-q') : null;
var input = box ? box.querySelector('input[name=captcha]') : null;
var self = this;
self.style.opacity = '.5';
fetch('captcha.php', { credentials: 'same-origin' })
.then(function (r) { return r.json(); })
.then(function (d) {
if (d && d.ok && qEl) { qEl.textContent = d.q; }
if (input) { input.value = ''; input.focus(); }
})
.catch(function () { window.location.href = 'captcha.php'; })
.then(function () { self.style.opacity = '1'; });
});
}
}
/* ---------- 管理员口令:填写后显示"处理状态",并解除邮箱必填 ---------- */
function bindAdminToggle() {
var pw = document.querySelector('input[name=admin_password]');
if (!pw) { return; }
var statusBox = document.querySelector('.admin-status');
var emailInput = document.querySelector('input[name=email]');
var emailField = document.getElementById('emailField');
function sync() {
var isAdmin = pw.value.trim() !== '';
if (statusBox) { statusBox.hidden = !isAdmin; }
if (emailInput) {
emailInput.required = !isAdmin;
if (isAdmin) { emailInput.removeAttribute('required'); }
}
if (emailField) {
var req = emailField.querySelector('.req');
if (req) { req.style.visibility = isAdmin ? 'hidden' : 'visible'; }
}
}
pw.addEventListener('input', sync);
sync();
}
/* ---------- 防止重复提交(上传未完成时阻止提交) ---------- */
function bindNoDoubleSubmit() {
var forms = document.querySelectorAll('form');
for (var i = 0; i < forms.length; i++) {
forms[i].addEventListener('submit', function (ev) {
var box = this.querySelector('[data-uploader-root]');
if (box && Number(box.getAttribute('data-pending') || 0) > 0) {
ev.preventDefault();
alert('还有文件正在上传,请等待上传完成后再提交。');
return;
}
var btn = this.querySelector('button[type=submit]');
if (btn) {
setTimeout(function () { btn.disabled = true; btn.style.opacity = '.6'; }, 0);
setTimeout(function () { btn.disabled = false; btn.style.opacity = '1'; }, 5000);
}
});
}
}
/* ---------- 图片压缩(canvas,保留动图) ---------- */
function prepareImage(file, maxSide) {
return new Promise(function (resolve) {
// GIF 可能带动画,压缩会丢失动画 —— 原样上传
if (file.type === 'image/gif') {
resolve({ blob: file, mime: file.type, name: file.name });
return;
}
var url = URL.createObjectURL(file);
var img = new Image();
img.onload = function () {
var w = img.naturalWidth, h = img.naturalHeight;
var scale = Math.min(1, maxSide / Math.max(w, h));
var tw = Math.max(1, Math.round(w * scale));
var th = Math.max(1, Math.round(h * scale));
var small = file.size <= 600 * 1024;
if (small && scale >= 1) {
URL.revokeObjectURL(url);
resolve({ blob: file, mime: file.type, name: file.name });
return;
}
var cv = document.createElement('canvas');
cv.width = tw; cv.height = th;
cv.getContext('2d').drawImage(img, 0, 0, tw, th);
var prefer = (file.type === 'image/png' || file.type === 'image/webp') ? 'image/webp' : 'image/jpeg';
var quality = 0.82;
function done(blob, mime) {
URL.revokeObjectURL(url);
if (!blob || (blob.size >= file.size && small)) {
resolve({ blob: file, mime: file.type, name: file.name });
return;
}
var real = blob.type || mime;
resolve({ blob: blob, mime: real, name: renameExt(file.name, real) });
}
cv.toBlob(function (blob) {
if (blob && blob.type !== prefer) {
cv.toBlob(function (b2) { done(b2, 'image/jpeg'); }, 'image/jpeg', quality);
} else {
done(blob, prefer);
}
}, prefer, quality);
};
img.onerror = function () {
URL.revokeObjectURL(url);
resolve({ blob: file, mime: file.type, name: file.name });
};
img.src = url;
});
}
/* ---------- 附件直传 ---------- */
function initUploaderRoot(root) {
var csrf = root.getAttribute('data-csrf') || '';
var signUrl = root.getAttribute('data-sign-url') || 'upload.php';
var field = root.querySelector('.att-field');
var state = []; // 已成功的附件描述
var pending = 0;
try {
var init = JSON.parse(root.getAttribute('data-init') || '[]');
for (var i = 0; i < init.length; i++) { state.push(init[i]); }
} catch (e) { /* 忽略 */ }
function setPending(n) {
pending = Math.max(0, pending + n);
root.setAttribute('data-pending', String(pending));
}
function sync() {
if (!field) { return; }
var out = [];
for (var i = 0; i < state.length; i++) {
var s = state[i];
out.push({ kind: s.kind, key: s.key, size: s.size, name: s.name || '', mime: s.mime || '', w: s.w || 0, h: s.h || 0 });
}
field.value = out.length ? JSON.stringify(out) : '';
}
function countOf(kind) {
var n = 0;
for (var i = 0; i < state.length; i++) { if (state[i].kind === kind) { n++; } }
return n;
}
function makeNode(box, meta) {
var list = box.querySelector('.up-list');
var el = document.createElement('div');
el.className = 'up-item' + (meta.kind === 'video' ? ' video' : '');
var thumb = document.createElement('div');
thumb.className = 'up-thumb';
if (meta.kind === 'image') {
var im = document.createElement('img');
im.alt = '';
if (meta.thumb) { im.src = meta.thumb; }
thumb.appendChild(im);
} else {
thumb.classList.add('up-thumb-video');
thumb.textContent = 'VIDEO';
}
var info = document.createElement('div');
info.className = 'up-info';
var nm = document.createElement('div');
nm.className = 'up-name';
nm.textContent = meta.name || (meta.kind === 'image' ? '图片' : '视频');
var st = document.createElement('div');
st.className = 'up-state';
st.textContent = '等待上传…';
var bar = document.createElement('div');
bar.className = 'up-bar';
var fill = document.createElement('i');
bar.appendChild(fill);
info.appendChild(nm); info.appendChild(st); info.appendChild(bar);
var rm = document.createElement('button');
rm.type = 'button';
rm.className = 'up-del';
rm.textContent = '移除';
el.appendChild(thumb); el.appendChild(info); el.appendChild(rm);
list.appendChild(el);
return { el: el, fill: fill, st: st, rm: rm, thumb: thumb };
}
function removeItem(node, item) {
if (node && node.el && node.el.parentNode) { node.el.parentNode.removeChild(node.el); }
if (item) {
for (var i = 0; i < state.length; i++) {
if (state[i].key === item.key) { state.splice(i, 1); break; }
}
}
sync();
}
function sign(kind, ext, size, mime) {
return fetch(signUrl, {
method: 'POST',
credentials: 'same-origin',
headers: { 'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8' },
body: qs({ csrf: csrf, kind: kind, ext: ext, size: size, mime: mime })
}).then(function (r) {
return r.json().catch(function () { throw new Error('服务器返回异常(' + r.status + ')'); });
}).then(function (d) {
if (!d || !d.ok) { throw new Error((d && d.error) || '获取上传凭证失败'); }
return d;
});
}
function upload(cred, fields, blob, filename, onProgress) {
return new Promise(function (resolve, reject) {
var fd = new FormData();
for (var k in fields) {
if (fields.hasOwnProperty(k)) { fd.append(k, fields[k]); }
}
fd.append('file', blob, filename); // 文件必须是最后一个字段
var xhr = new XMLHttpRequest();
xhr.open('POST', cred.host, true);
xhr.upload.onprogress = function (e) {
if (e.lengthComputable && onProgress) { onProgress(e.loaded / e.total); }
};
xhr.onload = function () {
if (xhr.status === 200 || xhr.status === 204) { resolve(true); }
else {
var msg = String(xhr.responseText || '').replace(/<[^>]*>/g, ' ').slice(0, 160).trim();
reject(new Error('上传到存储失败(' + xhr.status + ')' + (msg ? ':' + msg : '')));
}
};
xhr.onerror = function () { reject(new Error('网络异常,上传中断')); };
xhr.send(fd);
});
}
async function handleFiles(box, files) {
var kind = box.getAttribute('data-kind') || 'image';
var maxCount = parseInt(box.getAttribute('data-max-count') || '1', 10);
var maxBytes = parseInt(box.getAttribute('data-max-bytes') || '0', 10);
var maxSide = parseInt(box.getAttribute('data-max-side') || '1600', 10);
var label = box.getAttribute('data-label') || '附件';
var allowed = (box.getAttribute('data-accept') || '').split(',');
for (var i = 0; i < files.length; i++) {
var file = files[i];
if (allowed.length && allowed.indexOf(file.type) < 0) {
alert('「' + file.name + '」格式不支持,请选择:' + allowed.join(' / '));
continue;
}
if (maxBytes > 0 && file.size > maxBytes) {
alert('「' + file.name + '」超过 ' + human(maxBytes) + ' 上限。');
continue;
}
if (countOf(kind) >= maxCount) {
alert(label + '最多上传 ' + maxCount + ' 个,请先移除已上传的文件。');
break;
}
var node = makeNode(box, { kind: kind, name: file.name, thumb: '' });
setPending(1);
node.rm.disabled = true;
try {
node.st.textContent = '处理中…';
var prepared;
if (kind === 'image') {
prepared = await prepareImage(file, maxSide);
if (prepared.blob !== file && prepared.blob.size > 0) {
node.st.textContent = '已压缩 ' + human(file.size) + ' → ' + human(prepared.blob.size);
try { node.thumb.querySelector('img').src = URL.createObjectURL(prepared.blob); } catch (e2) { /* 忽略 */ }
}
} else {
prepared = { blob: file, mime: file.type, name: file.name };
}
var ext = extByMime(prepared.mime);
var d = await sign(kind, ext, prepared.blob.size, prepared.mime);
node.st.textContent = '上传中…';
await upload(d.credential, d.fields, prepared.blob, prepared.name, function (p) {
node.fill.style.width = Math.round(p * 100) + '%';
node.st.textContent = '上传中 ' + Math.round(p * 100) + '%';
});
var item = {
kind: kind,
key: d.credential.key,
size: prepared.blob.size,
name: prepared.name,
mime: prepared.mime,
w: 0, h: 0,
thumb: d.credential.url || ''
};
state.push(item);
sync();
node.el.classList.add('done');
node.fill.style.width = '100%';
node.st.textContent = '已上传 · ' + human(item.size);
if (kind === 'image' && item.thumb) {
var imgEl = node.thumb.querySelector('img');
if (imgEl) { imgEl.src = item.thumb; }
}
node.rm.disabled = false;
node.rm.addEventListener('click', function (it) {
return function () { removeItem(node, it); };
}(item));
} catch (e) {
node.el.classList.add('fail');
node.st.textContent = (e && e.message) ? e.message : '上传失败';
node.rm.textContent = '删除';
node.rm.disabled = false;
node.rm.addEventListener('click', function () { removeItem(node, null); });
} finally {
setPending(-1);
}
}
}
// 回填服务端已保存的附件(校验失败后重新提交时)
var byKind = {};
for (var s = 0; s < state.length; s++) {
var it0 = state[s];
var box0 = root.querySelector('[data-uploader][data-kind="' + it0.kind + '"]');
if (!box0) { continue; }
byKind[it0.kind] = (byKind[it0.kind] || 0) + 1;
var nd = makeNode(box0, it0);
nd.el.classList.add('done');
nd.fill.style.width = '100%';
nd.st.textContent = '已上传 · ' + human(it0.size);
nd.rm.addEventListener('click', function (item, node) {
return function () { removeItem(node, item); };
}(it0, nd));
}
sync();
var boxes = $$('[data-uploader]', root);
for (var b = 0; b < boxes.length; b++) {
(function (box) {
var pick = box.querySelector('.up-pick');
var input = box.querySelector('.up-file');
if (!pick || !input) { return; }
pick.addEventListener('click', function () { input.click(); });
input.addEventListener('change', function () {
var files = [];
for (var k = 0; k < input.files.length; k++) { files.push(input.files[k]); }
input.value = '';
if (files.length) { handleFiles(box, files); }
});
// 拖拽上传
['dragenter', 'dragover'].forEach(function (ev) {
box.addEventListener(ev, function (e) { e.preventDefault(); box.classList.add('dragging'); });
});
['dragleave', 'drop'].forEach(function (ev) {
box.addEventListener(ev, function (e) { e.preventDefault(); box.classList.remove('dragging'); });
});
box.addEventListener('drop', function (e) {
e.preventDefault();
var files = [];
if (e.dataTransfer && e.dataTransfer.files) {
for (var k = 0; k < e.dataTransfer.files.length; k++) { files.push(e.dataTransfer.files[k]); }
}
if (files.length) { handleFiles(box, files); }
});
}(boxes[b]));
}
}
function bindUploaders() {
var roots = $$('[data-uploader-root]');
for (var i = 0; i < roots.length; i++) { initUploaderRoot(roots[i]); }
}
/* ---------- 附件灯箱:点击放大 + 左右切换 ---------- */
function bindLightbox() {
var galleries = $$('[data-gallery]');
if (!galleries.length) { return; }
var ov = null, items = [], cur = 0, lastFocus = null, built = false;
var media = null, nameEl = null, metaEl = null, origEl = null, prevBtn = null, nextBtn = null;
function buildOverlay() {
ov = document.createElement('div');
ov.className = 'lb';
ov.hidden = true;
ov.setAttribute('role', 'dialog');
ov.setAttribute('aria-modal', 'true');
ov.setAttribute('aria-label', '附件查看');
ov.innerHTML =
'<button type="button" class="lb-x" aria-label="关闭">✕</button>' +
'<div class="lb-stage">' +
'<button type="button" class="lb-nav lb-prev" aria-label="上一个">‹</button>' +
'<div class="lb-media"></div>' +
'<button type="button" class="lb-nav lb-next" aria-label="下一个">›</button>' +
'</div>' +
'<div class="lb-bar">' +
'<span class="lb-name"></span>' +
'<span class="lb-meta"></span>' +
'<a class="lb-orig" href="#" target="_blank" rel="noopener noreferrer">查看原图</a>' +
'</div>';
document.body.appendChild(ov);
media = $('.lb-media', ov);
nameEl = $('.lb-name', ov);
metaEl = $('.lb-meta', ov);
origEl = $('.lb-orig', ov);
prevBtn = $('.lb-prev', ov);
nextBtn = $('.lb-next', ov);
$('.lb-x', ov).addEventListener('click', close);
prevBtn.addEventListener('click', function () { go(-1); });
nextBtn.addEventListener('click', function () { go(1); });
ov.addEventListener('click', function (e) {
// 点空白处(遮罩本身或图片外的区域)关闭
if (e.target === ov || e.target === media) { close(); }
});
// 触摸左右滑动
var tx = 0, ty = 0, tracking = false;
ov.addEventListener('touchstart', function (e) {
if (!e.touches || e.touches.length !== 1) { tracking = false; return; }
tx = e.touches[0].clientX; ty = e.touches[0].clientY; tracking = true;
}, { passive: true });
ov.addEventListener('touchend', function (e) {
if (!tracking || !e.changedTouches || !e.changedTouches.length) { return; }
tracking = false;
var dx = e.changedTouches[0].clientX - tx;
var dy = e.changedTouches[0].clientY - ty;
if (Math.abs(dx) < 40 || Math.abs(dx) < Math.abs(dy)) { return; }
go(dx < 0 ? 1 : -1); // 左滑=看下一个,与浏览图片的直觉一致
}, { passive: true });
document.addEventListener('keydown', function (e) {
if (!ov || ov.hidden) { return; }
var k = e.key;
if (k === 'Escape') { close(); }
else if (k === 'ArrowLeft') { go(-1); }
else if (k === 'ArrowRight') { go(1); }
else if (k === 'Home') { cur = 0; render(); }
else if (k === 'End') { cur = items.length - 1; render(); }
else { return; }
e.preventDefault();
});
}
function render() {
if (!items.length) { return; }
var it = items[cur];
media.className = 'lb-media loading';
media.innerHTML = '';
var node;
if (it.kind === 'video') {
node = document.createElement('video');
node.controls = true;
node.autoplay = true;
node.playsInline = true;
node.setAttribute('playsinline', '');
node.src = it.src;
if (it.poster) { node.poster = it.poster; }
} else {
node = document.createElement('img');
node.alt = it.name || '';
node.src = it.src;
}
function ready() { media.classList.remove('loading'); }
node.addEventListener('load', ready);
node.addEventListener('loadeddata', ready);
node.addEventListener('error', ready);
media.appendChild(node);
nameEl.textContent = it.name || (it.kind === 'video' ? '视频' : '图片');
metaEl.textContent = (cur + 1) + ' / ' + items.length + (it.size ? ' · ' + it.size : '');
if (it.kind === 'video') {
origEl.hidden = true;
} else {
origEl.hidden = false;
origEl.href = it.full || it.src;
}
var multi = items.length > 1;
prevBtn.hidden = !multi;
nextBtn.hidden = !multi;
// 预载相邻图片,切换时更快
if (multi) {
var nb = [items[(cur + 1) % items.length], items[(cur - 1 + items.length) % items.length]];
for (var i = 0; i < nb.length; i++) {
if (nb[i].kind === 'image' && nb[i].src) { (new Image()).src = nb[i].src; }
}
}
}
function go(step) {
if (items.length < 2) { return; }
cur = (cur + step + items.length) % items.length;
render();
}
function open(list, idx) {
if (!built) { buildOverlay(); built = true; }
if (!list.length) { return; }
items = list;
cur = Math.max(0, Math.min(idx, list.length - 1));
lastFocus = document.activeElement;
// 打开灯箱时暂停正文里的内嵌视频,避免两个声音一起响
var inline = document.querySelectorAll('.atts video');
for (var i = 0; i < inline.length; i++) { try { inline[i].pause(); } catch (e) {} }
ov.hidden = false;
document.documentElement.classList.add('lb-open');
document.body.classList.add('lb-open');
render();
var x = $('.lb-x', ov);
if (x) { x.focus(); }
}
function close() {
if (!ov || ov.hidden) { return; }
ov.hidden = true;
media.innerHTML = ''; // 顺带停止灯箱里的视频播放
document.documentElement.classList.remove('lb-open');
document.body.classList.remove('lb-open');
if (lastFocus && lastFocus.focus) { try { lastFocus.focus(); } catch (e) {} }
}
// 收集一个画廊里的全部附件(按 DOM 顺序)
function itemsOf(gal) {
var els = $$('[data-lb-kind]', gal), out = [];
for (var i = 0; i < els.length; i++) {
var el = els[i];
out.push({
kind: el.getAttribute('data-lb-kind') || 'image',
src: el.getAttribute('data-lb-src') || el.getAttribute('href') || '',
full: el.getAttribute('data-lb-full') || '',
poster: el.getAttribute('data-lb-poster') || '',
name: el.getAttribute('data-lb-name') || '',
size: el.getAttribute('data-lb-size') || ''
});
}
return out;
}
for (var g = 0; g < galleries.length; g++) {
(function (gal) {
gal.addEventListener('click', function (e) {
var t = e.target, trigger = null;
while (t && t !== gal) {
if (t.getAttribute && t.getAttribute('data-lb-kind')) { trigger = t; break; }
t = t.parentNode;
}
if (!trigger) { return; }
e.preventDefault(); // 图片是 <a>,有 JS 时就在页内放大
var all = $$('[data-lb-kind]', gal), idx = 0;
for (var i = 0; i < all.length; i++) { if (all[i] === trigger) { idx = i; break; } }
open(itemsOf(gal), idx);
});
}(galleries[g]));
}
}
function boot() {
bindCaptchaRefresh();
bindAdminToggle();
bindNoDoubleSubmit();
bindUploaders();
bindLightbox();
}
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', boot);
} else {
boot();
}
})();