public static void Enable(IApplicationBuilder app, IHostingEnvironment env)
{
app.Use((context, task) => {
try
{
var originalUrl = context.Request.Path;
string newfilepath;
string sourcefile = env.WebRootPath + originalUrl;
ICompressor compressor;
var match = System.Text.RegularExpressions.Regex.Match(originalUrl, @"^(.+)\.(?<ext>png|jpg|jpeg|gif)$", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
if (match != null && match.Length > 0)
{
//判断请求头是否包括image/webp
if (context.Request.Headers["Accept"].ToString().ToLower().Contains("image/webp"))
{
#region webp
var result = $"{originalUrl}.webp";
newfilepath = env.WebRootPath + result;
if (File.Exists(sourcefile) == false)
{
return(task());
}
context.Response.ContentType = "image/webp";
compressor = compressors[0];
#endregion
}
else
{
#region 正常的图片压缩
var ext = match.Groups["ext"].Value.ToLower();
var result = $"{originalUrl}.c";
newfilepath = env.WebRootPath + result;
if (File.Exists(sourcefile) == false)
{
return(task());
}
if (ext == "jpg")
{
ext = "jpeg";
}
else if (ext == "gif")
{
return(task());
}
context.Response.ContentType = $"image/{ext}";
compressor = compressors[1];
#endregion
}
var srcfileinfo = new System.IO.FileInfo(sourcefile);
if (File.Exists(newfilepath))
{
var fileinfo = new System.IO.FileInfo(newfilepath);
if (fileinfo.LastWriteTime == srcfileinfo.LastWriteTime && fileinfo.Length > 0)
{
return(FileSender.SendFile(context, fileinfo, newfilepath));
}
}
compressor.Compress(app.ApplicationServices, sourcefile, newfilepath);
System.IO.File.SetLastWriteTime(newfilepath, srcfileinfo.LastWriteTime);
if (true)
{
var fileinfo = new System.IO.FileInfo(newfilepath);
return(FileSender.SendFile(context, fileinfo, newfilepath));
}
}
}
catch (Exception ex)
{
var loggerFactory = (ILoggerFactory)app.ApplicationServices.GetService(typeof(ILoggerFactory));
var logger = loggerFactory.CreateLogger("ImageToWebp");
logger.LogError(ex, "");
}
return(task());
});
}
public static void Enable(IApplicationBuilder app)
{
app.Use((context, task) => {
try
{
var configuration = app.ApplicationServices.GetService <IConfiguration>();
var originalUrl = context.Request.Path;
var match = System.Text.RegularExpressions.Regex.Match(originalUrl, @"^(.+)\.(?<ext>png|jpg|jpeg|bmp)$", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
if (match != null && match.Length > 0)
{
string sourcefile = configuration["wwwroot"] + originalUrl;
if (File.Exists(sourcefile) == false)
{
return(task());
}
var nodejsPath = "./squoosh";
if (Directory.Exists(nodejsPath) == false)
{
return(context.Response.WriteAsync("miss squoosh folder"));
}
string codedfile;
string type;
if (context.Request.Headers["Accept"].ToString().ToLower().Contains("image/webp"))
{
context.Response.ContentType = "image/webp";
codedfile = $"{configuration["wwwroot"]}/__webpcache__{originalUrl}.webp";
type = "webp";
}
else
{
codedfile = $"{configuration["wwwroot"]}/__webpcache__{originalUrl}.code";
type = Path.GetExtension(originalUrl).Substring(1).ToLower();
switch (type)
{
case "png":
context.Response.ContentType = "image/png";
break;
default:
context.Response.ContentType = "image/jpeg";
break;
}
}
var lastWriteTime = new FileInfo(sourcefile).LastWriteTime;
if (File.Exists(codedfile) == false || new FileInfo(codedfile).LastWriteTime != lastWriteTime)
{
var threadid = RunningDict.GetOrAdd(codedfile, (k) => {
return(Thread.CurrentThread.ManagedThreadId);
});
if (threadid == Thread.CurrentThread.ManagedThreadId)
{
try
{
var dir = Path.GetDirectoryName(codedfile);
if (Directory.Exists(dir) == false)
{
Directory.CreateDirectory(dir);
}
var info = new ProcessStartInfo();
info.FileName = configuration["nodePath"];
info.Arguments = $"\"{AppDomain.CurrentDomain.BaseDirectory}squoosh/index.js\" \"{sourcefile}\" {type} \"{codedfile}\"";
info.RedirectStandardError = true;
info.RedirectStandardOutput = true;
var process = System.Diagnostics.Process.Start(info);
process.WaitForExit();
var ret = process.StandardOutput.ReadToEnd();
if (ret.StartsWith("ok"))
{
new FileInfo(codedfile).LastWriteTime = lastWriteTime;
return(FileSender.SendFile(context, codedfile, lastWriteTime));
}
else
{
context.Response.ContentType = "text/html";
return(context.Response.WriteAsync(ret));
}
}
catch (Exception)
{
throw;
}
finally
{
RunningDict.Remove(codedfile, out int o);
}
}
else
{
return(task());
}
}
else
{
return(FileSender.SendFile(context, codedfile, lastWriteTime));
}
}
}
catch (Exception ex)
{
context.Response.ContentType = "text/html";
return(context.Response.WriteAsync(ex.ToString()));
}
return(task());
});
}
