private void btnSaveAs_Click(object sender, EventArgs e)
{
WXAPKG_FILE file = null;
if (btnListView.Checked)
{
if (1 != lvwFileList.SelectedItems.Count)
{
return;
}
file = lvwFileList.SelectedItems[0].Tag as WXAPKG_FILE;
}
else
{
if (null == tvwFileList.SelectedNode)
{
return;
}
file = tvwFileList.SelectedNode.Tag as WXAPKG_FILE;
}
if (null == file)
{
return;
}
SaveFileAs(file);
}
private void AddTreeNode(TreeNode tn_parent, string file_name, WXAPKG_FILE file)
{
TreeNode tn = null;
string[] arr_path = file_name.Split("/".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
if (tn_parent.Nodes.ContainsKey(arr_path[0]))
{
tn = tn_parent.Nodes[arr_path[0]];
}
else
{
tn = new TreeNode(arr_path[0]);
tn.Name = arr_path[0];
tn_parent.Nodes.Add(tn);
}
file_name = string.Join("/", arr_path);
if (file_name.IndexOf('/', 1) < 0)
{
tn.Tag = file;
tn.ToolTipText =
"大小：" + FormatCapability((UInt64)file.m_size) +
" 偏移：" + file.m_offset;
return;
}
file_name = file_name.Substring(file_name.IndexOf('/', 1));
AddTreeNode(tn, file_name, file);
}
private void lvwFileList_SelectedIndexChanged(object sender, EventArgs e)
{
if (1 != lvwFileList.SelectedItems.Count)
{
return;
}
WXAPKG_FILE file = lvwFileList.SelectedItems[0].Tag as WXAPKG_FILE;
if (null == file)
{
return;
}
btnSaveAs.Enabled = true;
ShowFileContent(file);
}
private void tvwFileList_AfterSelect(object sender, TreeViewEventArgs e)
{
if (null == e.Node ||
e.Node.Nodes.Count > 0)
{
btnSaveAs.Enabled = false;
return;
}
WXAPKG_FILE file = e.Node.Tag as WXAPKG_FILE;
if (null == file)
{
return;
}
btnSaveAs.Enabled = true;
ShowFileContent(file);
}
private void SaveFileAs(WXAPKG_FILE file)
{
if ("" == txtWXAPKG.Text ||
null == file)
{
return;
}
sfd.FileName = file.m_name.Substring(file.m_name.LastIndexOf('/') + 1);
if (DialogResult.OK != sfd.ShowDialog())
{
return;
}
FileStream fs = null;
try
{
fs = new FileStream(txtWXAPKG.Text, FileMode.Open, FileAccess.Read);
byte[] b_content = new byte[file.m_size];
fs.Seek((long)file.m_offset, SeekOrigin.Begin);
fs.Read(b_content, 0, b_content.Length);
fs.Close();
fs = new FileStream(sfd.FileName, FileMode.Create, FileAccess.ReadWrite);
fs.Write(b_content, 0, b_content.Length);
MessageBox.Show("成功保存到：" + sfd.FileName);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
if (null != fs)
{
fs.Close();
}
}
}
private void btnWXAPKG_Click(object sender, EventArgs e)
{
if (DialogResult.OK != ofd.ShowDialog())
{
return;
}
txtContent.Text = "";
txtWXAPKG.Text = ofd.FileName;
lvwFileList.Items.Clear();
tvwFileList.Nodes.Clear();
// WXAPKG 格式：https://toutiao.io/posts/33fum8/preview
FileStream fs = null;
try
{
fs = new FileStream(txtWXAPKG.Text, FileMode.Open, FileAccess.Read);
// 获取头部信息
WXAPKG_HEADER header = new WXAPKG_HEADER();
// 第一个标识，固定为 0xBE
header.m_first_mark = (byte)fs.ReadByte();
if (0xBE != header.m_first_mark)
{
throw new Exception("文件第一个标识有误，非 WXAPKG 格式文件！");
}
// 版本号，0 -> 微信分发到客户端 1 -> 开发者上传到微信后台
byte[] b_int = new byte[4];
fs.Read(b_int, 0, b_int.Length);
header.m_edition = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
// 索引段的长度
fs.Read(b_int, 0, b_int.Length);
header.m_index_info_length = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
// 数据段的长度
fs.Read(b_int, 0, b_int.Length);
header.m_body_info_length = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
// 第二个标识，固定为 0xED
header.m_last_mark = (byte)fs.ReadByte();
if (0xED != header.m_last_mark)
{
throw new Exception("文件标识有误，非 WXAPKG 格式文件！");
}
// 文件数量
fs.Read(b_int, 0, b_int.Length);
header.m_file_count = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
tvwFileList.BeginUpdate();
TreeNode tn_root = tvwFileList.Nodes.Add("/");
lvwFileList.BeginUpdate();
// 获取每个文件的信息
for (int i = 0; i < header.m_file_count; i++)
{
WXAPKG_FILE file = new WXAPKG_FILE();
// 文件长度
fs.Read(b_int, 0, b_int.Length);
file.m_name_length = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
if (file.m_name_length > 255)
{
throw new Exception("错误的文件长度！");
}
// 文件名
byte[] b_name = new byte[file.m_name_length];
fs.Read(b_name, 0, b_name.Length);
file.m_name = Encoding.UTF8.GetString(b_name);
// 偏移
fs.Read(b_int, 0, b_int.Length);
file.m_offset = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
// 大小
fs.Read(b_int, 0, b_int.Length);
file.m_size = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b_int, 0));
// 添加到列表框
ListViewItem lvi = new ListViewItem(file.m_name);
lvi.SubItems.Add(FormatCapability((UInt64)file.m_size));
lvi.SubItems.Add(file.m_offset.ToString());
lvi.Tag = file;
lvwFileList.Items.Add(lvi);
// 添加到树形框
AddTreeNode(tn_root, file.m_name, file);
}
lvwFileList.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent);
lvwFileList.EndUpdate();
tvwFileList.ExpandAll();
tvwFileList.EndUpdate();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
if (null != fs)
{
fs.Close();
}
}
}
private void ShowFileContent(WXAPKG_FILE file)
{
if ("" == txtWXAPKG.Text ||
null == file)
{
return;
}
FileStream fs = null;
try
{
fs = new FileStream(txtWXAPKG.Text, FileMode.Open, FileAccess.Read);
byte[] b_content = new byte[file.m_size];
fs.Seek((long)file.m_offset, SeekOrigin.Begin);
fs.Read(b_content, 0, file.m_size);
fs.Close();
string file_name = file.m_name.ToLower();
if (file_name.EndsWith(".js") ||
file_name.EndsWith(".json"))
{
string content = Encoding.UTF8.GetString(b_content);
if (btnBeautifyJS.Checked)
{
JSBeautifyOptions jsbo = new JSBeautifyOptions();
JSBeautify jsb = new JSBeautify(content, jsbo);
content = jsb.GetResult();
}
txtContent.Text = content;
txtContent.BringToFront();
tsContent.Enabled = true;
btnBeautifyJS.Enabled = true;
}
else if (file_name.EndsWith(".png") ||
file_name.EndsWith(".jpg") ||
file_name.EndsWith(".gif") ||
file_name.EndsWith(".bmp"))
{
MemoryStream ms = new MemoryStream(b_content);
Bitmap bmp = (Bitmap)Bitmap.FromStream(ms);
ms.Close();
picPreview.BackgroundImage = bmp;
picPreview.BringToFront();
tsContent.Enabled = false;
}
else
{
string content = Encoding.UTF8.GetString(b_content);
txtContent.Text = content;
txtContent.BringToFront();
tsContent.Enabled = true;
btnBeautifyJS.Enabled = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
if (null != fs)
{
fs.Close();
}
}
}