### Setup gomobile for Mobile Development

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README_zh-TW.md

Installs gomobile and initializes it for mobile development. Required for building Android and iOS versions.

```bash
go install golang.org/x/mobile/cmd/gomobile@latest
go get -u golang.org/x/mobile/bind
gomobile init
```

--------------------------------

### Setup gomobile for Mobile Builds

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Installs the gomobile tool and initializes it, which is necessary for building Gopeed for mobile platforms. Ensure cgo environment is prepared.

```bash
go install golang.org/x/mobile/cmd/gomobile@latest
go get golang.org/x/mobile/bind
gomobile init
```

--------------------------------

### Install Gopeed CLI

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README_zh-TW.md

Use 'go install' to install the Gopeed CLI tool. Ensure you have Go installed and configured.

```bash
go install github.com/GopeedLab/gopeed/cmd/gopeed@latest
```

--------------------------------

### Run Project Locally

Source: https://github.com/ltaoo/wx_channels_download/blob/main/README.md

To run the project locally, start a terminal as an administrator and execute the go run command. This is for development purposes.

```bash
go run main.go
```

--------------------------------

### Build Gopeed for Windows Desktop

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Builds the Gopeed shared library for Windows and then builds the Flutter Windows application. Requires cgo environment setup.

```bash
go build -tags nosqlite -ldflags="-w -s" -buildmode=c-shared -o ui/flutter/windows/libgopeed.dll github.com/GopeedLab/gopeed/bind/desktop
cd ui/flutter
flutter build windows
```

--------------------------------

### Build Gopeed for Web

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Builds the Flutter web application, copies the output to the web command directory, and then builds the Go web server. Requires cgo environment setup.

```bash
cd ui/flutter
flutter build web
cd ../..
rm -rf cmd/web/dist
cp -r ui/flutter/build/web cmd/web/dist
go build -tags nosqlite,web -ldflags="-s -w" -o bin/ github.com/GopeedLab/gopeed/cmd/web
```

--------------------------------

### Build Gopeed for iOS

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Binds the mobile package for iOS and then builds the Flutter iOS application. Requires gomobile and cgo setup.

```bash
gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/ios/Frameworks/Libgopeed.xcframework -target=ios github.com/GopeedLab/gopeed/bind/mobile
cd ui/flutter
flutter build ios --no-codesign
```

--------------------------------

### Build Gopeed for Linux Desktop

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Builds the Gopeed shared library for Linux and then builds the Flutter Linux application. Requires cgo environment setup.

```bash
go build -tags nosqlite -ldflags="-w -s" -buildmode=c-shared -o ui/flutter/linux/bundle/lib/libgopeed.so github.com/GopeedLab/gopeed/bind/desktop
cd ui/flutter
flutter build linux
```

--------------------------------

### Build Gopeed for macOS Desktop

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Builds the Gopeed shared library for macOS and then builds the Flutter macOS application. Requires cgo environment setup.

```bash
go build -tags nosqlite -ldflags="-w -s" -buildmode=c-shared -o ui/flutter/macos/Frameworks/libgopeed.dylib github.com/GopeedLab/gopeed/bind/desktop
cd ui/flutter
flutter build macos
```

--------------------------------

### Install Root Certificate on Debian/Ubuntu

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/guide/certificate.md

Installs the SunnyRoot.cer certificate into the system's trusted certificate store on Debian-based systems. Ensure the certificate file is downloaded before running these commands.

```bash
sudo mkdir -p /usr/local/share/ca-certificates
sudo install -m 0644 ~/Downloads/SunnyRoot.cer /usr/local/share/ca-certificates/WeChatAppEx_CA.crt
sudo update-ca-certificates --fresh
```

--------------------------------

### Install Root Certificate on Fedora/RHEL/CentOS

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/guide/certificate.md

Installs the SunnyRoot.cer certificate into the system's trusted certificate store on Fedora, RHEL, or CentOS. The certificate file should be downloaded prior to execution.

```bash
sudo mkdir -p /etc/pki/ca-trust/source/anchors
sudo install -m 0644 ~/Downloads/SunnyRoot.cer /etc/pki/ca-trust/source/anchors/WeChatAppEx_CA.crt
sudo update-ca-trust extract
```

--------------------------------

### Install Root Certificate on Arch/Manjaro

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/guide/certificate.md

Installs the SunnyRoot.cer certificate into the system's trusted certificate store on Arch Linux or Manjaro. Download the certificate file before running these commands.

```bash
sudo mkdir -p /etc/ca-certificates/trust-source/anchors
sudo install -m 0644 ~/Downloads/SunnyRoot.cer /etc/ca-certificates/trust-source/anchors/WeChatAppEx_CA.crt
sudo trust extract-compat
```

--------------------------------

### Build Gopeed for Android

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Binds the mobile package for Android and then builds the Flutter Android application. Requires gomobile and cgo setup, and targets Android API 21.

```bash
gomobile bind -tags nosqlite -ldflags="-w -s -checklinkname=0" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
cd ui/flutter
flutter build apk
```

--------------------------------

### Build Script Reference

Source: https://github.com/ltaoo/wx_channels_download/blob/main/README.md

Refer to the build script located in the build/ directory for instructions on how to package the application.

```bash
build/build.sh
```

--------------------------------

### Add 'Download Video and Cover' Menu Item

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/feature/custom-menu.md

Add this JavaScript code to a `global.js` file in the same directory as `wx_video_download.exe` to include a new option in the floating menu that downloads both the video and its cover image. This snippet handles video decryption and saving both assets as a zip file.

```javascript
// global.js
WXU.unshiftMenuItems([
  {
    label: "下载视频和封面",
    async onClick() {
      var [err, feed] = WXU.check_feed_existing({
        silence: true,
      });
      if (err) return;
      var filename = WXU.build_filename(
        feed,
        feed.spec[0],
        WXU.config.downloadFilenameTemplate
      );
      if (WXU.config.downloadPauseWhenDownload) {
        WXU.pause_cur_video();
      }
      var ins = WXU.loading();
      var [err, response] = await WXU.fetch(feed.url);
      if (err) {
        WXU.error({
          msg: err.message,
        });
        return;
      }
      var media_blob = await WXU.download_with_progress(response, {
        onStart({ total_size }) {
          WXU.log({
            msg: `总大小 ${WXU.bytes_to_size(total_size)}`,
          });
        },
        onProgress({ loaded_size, progress }) {
          WXU.log({
            replace: 1,
            msg:
              progress === null
                ? `${WXU.bytes_to_size(loaded_size)}`
                : `${progress}%`,
          });
        },
      });
      var media_buf = new Uint8Array(await media_blob.arrayBuffer());
      if (feed.key) {
        WXU.log({
          msg: "下载完成，开始解密",
        });
        var [err, data] = await WXU.decrypt_video(media_buf, feed.key);
        if (err) {
          WXU.error({ msg: "解密失败，" + err.message, alert: 0 });
          WXU.error({ msg: "尝试使用 decrypt 命令解密", alert: 0 });
        } else {
          WXU.log({ msg: "解密成功" });
          media_buf = data;
        }
      }
      var decrypted_media_blob = new Blob([media_buf], { type: "video/mp4" });
      var zip = await WXU.Zip();
      zip.file(filename + ".mp4", decrypted_media_blob);
      var cover_url = feed.cover_url.replace(/^http/, "https");
      var [err, cover_response] = await WXU.fetch(cover_url);
      if (err) {
        WXU.error({
          msg: err.message,
        });
        return;
      }
      var cover_blob = await cover_response.blob();
      zip.file(filename + ".jpg", cover_blob);
      var zip_blob = await zip.generateAsync({ type: "blob" });
      WXU.save(zip_blob, filename + ".zip");
      ins.hide();
      if (WXU.config.downloadPauseWhenDownload) {
        WXU.play_cur_video();
      }
    },
  },
]);
```

--------------------------------

### Initialize Management WebSocket

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Initializes a WebSocket connection for management tasks. Includes automatic reconnection and a ping interval to maintain the connection.

```javascript
let manageWs = null;

function initManageWebSocket() {
  if (manageWs) return;

  const proto = window.location.protocol === "https:" ? "wss:" : "ws:";
  const url = proto + "//" + window.location.host + "/ws/manage";
  manageWs = new WebSocket(url);

  manageWs.onopen = () => {
    console.log("Manage WS connected");
    // Send a ping every 30s to keep alive
    setInterval(() => {
      if (manageWs.readyState === WebSocket.OPEN) {
        manageWs.send(JSON.stringify({ type: "ping", data: "manager" }));
      }
    }, 30000);
  };

  manageWs.onmessage = (event) => {
    try {
      const msg = JSON.parse(event.data);
      if (msg.type === "refresh_progress") {
        updateProgressModal(msg.data);
      }
    } catch (e) {
      console.error("WS message error", e);
    }
  };

  manageWs.onclose = () => {
    console.log("Manage WS closed, retrying in 5s...");
    manageWs = null;
    setTimeout(initManageWebSocket, 5000);
  };
}
```

--------------------------------

### Handle File Selection

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Placeholder function for handling file selection. Currently displays a 'feature under development' toast and resets the input.

```javascript
function handleFileSelect(event) {
  const file = event.target.files[0];
  if (!file) return;
  showToast('文件发送功能开发中...');
  event.target.value = '';
}
```

--------------------------------

### Load Accounts with Pagination

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Loads accounts with specified page and page size. Resets to page 1 if page size changes.

```javascript
loadAccounts({ page: 1, keyword: "" });
}

function changePageSize(v) {
  const next = parseInt(String(v || "10"), 10);
  loadAccounts({ page: 1, pageSize: Number.isFinite(next) && next > 0 ? next : 10 });
}
```

--------------------------------

### Navigate Pagination

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Handles previous and next page navigation for account lists.

```javascript
function prevPage() {
  loadAccounts({ page: Math.max(1, (LIST_STATE.page || 1) - 1) });
}

function nextPage() {
  loadAccounts({ page: (LIST_STATE.page || 1) + 1 });
}
```

--------------------------------

### 监听 feed 事件并发送到服务器

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/feature/event.md

当加载 feed 时，将视频信息发送到指定的 API 端点。需要 WXU 库支持。错误会通过 WXU.error 记录，成功响应通过 WXU.log 显示。

```javascript
// global.js
WXU.onFeed(async (feed) => {
  const [err, res] = await WXU.request({
    method: "POST",
    url: "http://127.0.0.1:1234/api/feed",
    body: feed,
  });
  if (err) {
    WXU.error({ msg: err.message });
    return;
  }
  WXU.log({ msg: JSON.stringify(res) });
});
```

--------------------------------

### Clone Gopeed Repository

Source: https://github.com/ltaoo/wx_channels_download/blob/main/pkg/gopeed/README.md

Use this command to clone the Gopeed project repository from GitHub.

```bash
git clone git@github.com:GopeedLab/gopeed.git
```

--------------------------------

### Initial Status Check

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Performs an initial check of the user's login status when the page loads.

```javascript
checkStatus();
```

--------------------------------

### Handle Image Selection

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Placeholder function for handling image file selection. Currently displays a 'feature under development' toast and resets the input.

```javascript
function handleImageSelect(event) {
  const file = event.target.files[0];
  if (!file) return;
  showToast('图片发送功能开发中...');
  event.target.value = '';
}
```

--------------------------------

### Go 服务端处理 feed 请求

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/feature/event.md

一个简单的 Go HTTP 服务器，用于接收来自前端的 feed 数据。实现了 CORS 支持和 POST 请求处理，并将接收到的 body 打印到日志。适用于接收前端发送的视频信息。

```go
package main

import (
	"io"
	"log"
	"net/http"
)

func setCORS(w http.ResponseWriter) {
	h := w.Header()
	h.Set("Access-Control-Allow-Origin", "*")
	h.Set("Access-Control-Allow-Methods", "POST, OPTIONS")
	h.Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
}

func feedHandler(w http.ResponseWriter, r *http.Request) {
	setCORS(w)
	if r.Method == http.MethodOptions {
		w.WriteHeader(http.StatusNoContent)
		return
	}
	if r.Method != http.MethodPost {
		http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
		return
	}
	body, err := io.ReadAll(r.Body)
	if err != nil {
		log.Printf("read body error: %v", err)
		http.Error(w, "Bad Request", http.StatusBadRequest)
		return
	}
	defer r.Body.Close()
	log.Printf("feed: %s", string(body))
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)
	_, _ = w.Write([]byte(`{"ok":true}`))
}

func main() {
	mux := http.NewServeMux()
	mux.HandleFunc("/api/feed", feedHandler)
	addr := "127.0.0.1:1234"
	log.Printf("HTTP server listening on %s", addr)
	if err := http.ListenAndServe(addr, mux); err != nil {
		log.Fatalf("server error: %v", err)
	}
}
```

--------------------------------

### Copy Refresh Links

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Copies up to 5 refresh URIs to the clipboard. Falls back to document.execCommand if navigator.clipboard is unavailable.

```javascript
async function copyRefreshLinks(btn) {
  if (REMOTE_MODE) return;
  let links = [];
  try {
    const data = await fetchAccountPage({ page: 1, pageSize: 5, keyword: LIST_STATE.keyword || "" });
    links = (data.list || [])
      .map((it) => (it && it.refresh_uri ? String(it.refresh_uri).trim() : ""))
      .filter(Boolean);
  } catch (e) {
    links = (Array.isArray(ACCOUNTS_CACHE) ? ACCOUNTS_CACHE : [])
      .map((it) => (it && it.refresh_uri ? String(it.refresh_uri).trim() : ""))
      .filter(Boolean)
      .slice(0, 5);
  }

  if (!links.length) {
    alert("列表中没有可复制的 refresh_uri");
    return;
  }

  const text = links.join("\n");
  const old = btn ? btn.textContent : "";

  try {
    if (navigator.clipboard && navigator.clipboard.writeText) {
      await navigator.clipboard.writeText(text);
    } else {
      const ta = document.createElement("textarea");
      ta.value = text;
      ta.style.position = "fixed";
      ta.style.left = "-9999px";
      ta.style.top = "-9999px";
      document.body.appendChild(ta);
      ta.focus();
      ta.select();
      const ok = document.execCommand("copy");
      document.body.removeChild(ta);
      if (!ok) throw new Error("复制失败");
    }
    if (btn) btn.textContent = "已复制";
    setTimeout(() => {
      if (btn) btn.textContent = old;
    }, 1200);
  } catch (e) {
    alert(String(e && e.message ? e.message : e));
  }
}
```

--------------------------------

### Refresh All Accounts

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Initiates a refresh for all selected accounts via a POST request. Shows a progress modal and updates button state.

```javascript
async function refreshAll(btn) {
  const checked = Array.from(document.querySelectorAll(".select-row:checked"));
  const bizList = checked.map(c => c.value);

  // Show modal
  const modal = document.getElementById("progress-modal");
  if (modal) {
    modal.classList.add("visible");
    document.getElementById("prog-success").textContent = "0";
    document.getElementById("prog-failed").textContent = "0";
    document.getElementById("prog-fill").style.width = "0%";
    document.getElementById("prog-percent").textContent = "0%";
    document.getElementById("prog-text").textContent = "正在请求任务...";
    document.getElementById("modal-close-btn").style.visibility = "hidden";
  }

  if (btn) {
    btn.disabled = true;
    var old = btn.textContent;
    btn.textContent = "刷新中...";
  }

  try {
    const r = await fetch("/api/mp/refresh_with_frontend", {
      method: "POST",
      headers: {
        "Content-Type": "application/json"
      },
      body: JSON.stringify({ biz_list: bizList })
    });
    const j = await r.json().catch(() => ({}));
    if (j && j.code !== undefined && j.code !== 0) {
      alert(j.msg || "接口错误");
      closeProgressModal();
    }
  } catch (e) {
    alert(String(e && e.message ? e.message : e));
    closeProgressModal();
  } finally {
    if (btn) {
      btn.disabled = false;
      btn.textContent = old;
    }
  }

  loadAccounts();
  loadWsPool();
}
```

--------------------------------

### Check Login Status

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Fetches the user's login status from the API. Shows the chat section if logged in, otherwise refreshes the QR code.

```javascript
async function checkStatus() {
  try {
    const resp = await fetch(`${API_BASE}/api/filehelper/status`);
    const result = await resp.json();
    if (result.code === 0 && result.data?.logged_in) {
      showChatSection();
    } else {
      refreshQRCode();
    }
  } catch (e) {
    refreshQRCode();
  }
}
```

--------------------------------

### Add Certificate to User NSS Database

Source: https://github.com/ltaoo/wx_channels_download/blob/main/docs/guide/certificate.md

Adds the SunnyRoot.cer certificate to the current user's NSS database for browsers and Electron applications. This command requires `certutil` from `libnss3-tools` or `nss-tools`. It ensures the database exists and then imports the certificate with trust settings.

```bash
mkdir -p ~/.pki/nssdb
[ -f ~/.pki/nssdb/cert9.db ] || certutil -d sql:$HOME/.pki/nssdb -N --empty-password
certutil -d sql:$HOME/.pki/nssdb -D -n WeChatAppEx_CA 2>/dev/null || true
certutil -d sql:$HOME/.pki/nssdb -A -n WeChatAppEx_CA -t "CT,C,C" -i ~/Downloads/SunnyRoot.cer
```

--------------------------------

### Trigger File Input

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Simulates a click on a hidden file input element to allow users to select a file.

```javascript
function sendFile() {
  document.getElementById('fileInput').click();
}
```

--------------------------------

### Format Video Duration

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Formats a given number of seconds into a 'minutes:seconds' string. Ensures seconds are padded with a leading zero if less than 10.

```javascript
function formatDuration(seconds) {
  const s = parseInt(seconds) || 0;
  const m = Math.floor(s / 60);
  const sec = s % 60;
  return `${m}:${sec.toString().padStart(2, '0')}`;
}
```

--------------------------------

### Handle User Logout

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Logs the user out after confirmation. Resets polling flags, clears messages, and shows the login section.

```javascript
async function handleLogout() {
  if (!confirm('确定要退出登录吗？')) return;
  try {
    await fetch(`${API_BASE}/api/filehelper/logout`, {
      method: 'POST'
    });
    polling = false;
    syncCheckPolling = false;
    messages = [];
    showLoginSection();
    refreshQRCode();
  } catch (e) {
    showToast('退出失败: ' + e.message);
  }
}
```

--------------------------------

### Refresh Single Account

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Initiates a refresh for a single specified account via a POST request. Updates button state during the operation.

```javascript
async function refreshOne(btn, biz) {
  if (!biz) return;
  btn.disabled = true;
  const old = btn.textContent;
  btn.textContent = "刷新中";

  try {
    const r = await fetch("/api/mp/refresh_with_frontend", {
      method: "POST",
      headers: {
        "Content-Type": "application/json"
      },
      body: JSON.stringify({ biz_list: [biz] })
    });
    const j = await r.json().catch(() => ({}));
    if 
```

--------------------------------

### Trigger Image Input

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Simulates a click on a hidden file input element to allow users to select an image.

```javascript
function sendImage() {
  document.getElementById('imageInput').click();
}
```

--------------------------------

### Send Message via API

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Sends a text message to the server using a POST request. Handles success by clearing the input and updating the message list, or shows an error toast on failure.

```javascript
async function sendMessage() {
  const input = document.getElementById('messageInput');
  const text = input.value.trim();
  if (!text) return;
  try {
    const resp = await fetch(`${API_BASE}/api/filehelper/send`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({ text })
    });
    const result = await resp.json();
    if (result.code === 0) {
      input.value = '';
      messages.push({ MsgId: Date.now().toString(), type: 'text', text: text, isMine: true, CreateTime: Math.floor(Date.now() / 1000) });
      renderMessages();
    } else {
      showToast('发送失败: ' + result.msg);
    }
  } catch (e) {
    showToast('发送失败: ' + e.message);
  }
}
```

--------------------------------

### Disclaimer Text

Source: https://github.com/ltaoo/wx_channels_download/blob/main/README.md

This is a disclaimer text outlining the purpose and usage restrictions of the open-source project. It emphasizes legal compliance and prohibits illegal use.

```text
本项目为开源项目
仅用于技术交流学习和研究的目的
请遵守法律法规,请勿用作任何非法用途
否则造成一切后果自负
若您下载并使用即视为您知晓并同意
```

--------------------------------

### Update Progress Modal

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/officialaccount/ui/manager.html

Updates the visibility and content of a progress modal based on received WebSocket data.

```javascript
function updateProgressModal(data) {
  const modal = document.getElementById("progress-modal");
  if (!modal || !modal.classList.contains("visible")) return;

  const total = data.total || 0;
  const current = data.current || 0;
  const success = data.success || 0;
  const failed = data.failed || 0;
  const percent = data.percent || 0;

  document.getElementById("prog-success").textContent = success;
  document.getElementById("prog-failed").textContent = failed;
  document.getElementById("prog-fill").style.width = percent + "%ிகளில்";
  document.getElementById("prog-percent").textContent = percent + "%ிகளில்";
  document.getElementById("prog-text").textContent = `正在处理: ${current} / ${total}`;

  if (current >= total && total > 0) {
    document.getElementById("prog-text").textContent = "处理完成";
    document.getElementById("modal-close-btn").style.visibility = "visible";
  }
}
```

--------------------------------

### Parse Video Channel XML Message

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Parses XML content from video channels to extract feed information. Handles potential XML parsing errors and returns a structured object or null.

```javascript
function parseFinderFeed(content) {
  try {
    const xml = decodeAndCleanXml(content);
    const parser = new DOMParser();
    const doc = parser.parseFromString(xml, 'text/xml');
    if (doc.querySelector('parsererror')) {
      console.error('XML 解析失败:', xml.substring(0, 200));
      return null;
    }
    const finderFeed = doc.querySelector('finderFeed');
    if (!finderFeed) return null;
    const getTextContent = (selector) => {
      const el = finderFeed.querySelector(selector);
      return el ? el.textContent.trim() : '';
    };
    const media = finderFeed.querySelector('mediaList media');
    return {
      nickname: getTextContent('nickname'),
      avatar: getTextContent('avatar'),
      desc: getTextContent('desc'),
      coverUrl: media ? (media.querySelector('coverUrl')?.textContent.trim() || '') : '',
      thumbUrl: media ? (media.querySelector('thumbUrl')?.textContent.trim() || '') : '',
      videoUrl: media ? (media.querySelector('url')?.textContent.trim() || '') : '',
      duration: media ? (media.querySelector('videoPlayDuration')?.textContent.trim() || '0') : '0',
    };
  } catch (e) {
    console.error('解析视频号消息失败:', e);
    return null;
  }
}
```

--------------------------------

### Handle Enter Key for Sending Message

Source: https://github.com/ltaoo/wx_channels_download/blob/main/internal/api/ui/filehelper.html

Prevents default form submission when the Enter key is pressed without the Shift key, allowing the sendMessage function to be called.

```javascript
function handleKeyDown(event) {
  if (event.key === 'Enter' && !event.shiftKey) {
    event.preventDefault();
    sendMessage();
  }
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.