private void UpdateWebFileCache(string file, string content, Encoding encoding)
{
var cachedItem = filesCache.Find(wfc => wfc.FilePath == file);
if (cachedItem == null)
{
cachedItem = new WebFile();
filesCache.Add(cachedItem);
}
cachedItem.FilePath = file;
cachedItem.Content = content;
cachedItem.Encoding = encoding;
cachedItem.IsCached = true;
}
private WebFile GetWebFile(string file)
{
WebFile fileItem = new WebFile(), cachedItem = null;
try
{
cachedItem = filesCache.Find(wfc => wfc.FilePath == file);
}
catch (Exception ex)
{
//TODO: sometimes the Find method fires an "object reference not set" error (who knows why???)
MigService.Log.Error(ex);
// clear possibly corrupted cache items
ClearWebCache();
}
//
if (cachedItem != null && (DateTime.Now - cachedItem.Timestamp).TotalSeconds < 600)
{
fileItem = cachedItem;
}
else
{
Encoding fileEncoding = DetectWebFileEncoding(file); //TextFileEncodingDetector.DetectTextFileEncoding(file);
if (fileEncoding == null)
{
fileEncoding = defaultWebFileEncoding;
}
fileItem.Content = File.ReadAllText(file, fileEncoding); //Encoding.UTF8.GetString(buffer, 0, buffer.Length);
fileItem.Encoding = fileEncoding;
if (cachedItem != null)
{
filesCache.Remove(cachedItem);
}
}
return(fileItem);
}
private void Worker(object state)
{
HttpListenerRequest request = null;
HttpListenerResponse response = null;
try
{
var context = state as HttpListenerContext;
//
request = context.Request;
response = context.Response;
//
if (request.UserLanguages != null && request.UserLanguages.Length > 0)
{
try
{
CultureInfo culture = CultureInfo.CreateSpecificCulture(request.UserLanguages[0].ToLowerInvariant().Trim());
Thread.CurrentThread.CurrentCulture = culture;
Thread.CurrentThread.CurrentUICulture = culture;
}
catch
{
}
}
//
if (request.IsSecureConnection)
{
var clientCertificate = request.GetClientCertificate();
var chain = new X509Chain
{
ChainPolicy = { RevocationMode = X509RevocationMode.NoCheck }
};
chain.Build(clientCertificate);
if (chain.ChainStatus.Length != 0)
{
// Invalid certificate
response.StatusCode = (int)HttpStatusCode.Unauthorized;
response.OutputStream.Close();
return;
}
}
//
response.Headers.Set(HttpResponseHeader.Server, "MIG WebService Gateway");
response.KeepAlive = false;
//
bool requestHasAuthorizationHeader = request.Headers["Authorization"] != null;
string remoteAddress = request.RemoteEndPoint.Address.ToString();
string logExtras = "";
//
if (servicePassword == "" || requestHasAuthorizationHeader) //request.IsAuthenticated)
{
bool verified = false;
//
string authUser = "";
string authPass = "";
//
//NOTE: context.User.Identity and request.IsAuthenticated
//aren't working under MONO with this code =/
//so we proceed by manually parsing Authorization header
//
//HttpListenerBasicIdentity identity = null;
//
if (requestHasAuthorizationHeader)
{
//identity = (HttpListenerBasicIdentity)context.User.Identity;
// authuser = identity.Name;
// authpass = identity.Password;
byte[] encodedDataAsBytes = Convert.FromBase64String(request.Headers["Authorization"].Split(' ')[1]);
string authtoken = Encoding.UTF8.GetString(encodedDataAsBytes);
authUser = authtoken.Split(':')[0];
authPass = authtoken.Split(':')[1];
}
//
//TODO: complete authorization (for now with one fixed user 'admin', add multiuser support)
//
if (servicePassword == "" || authUser == serviceUsername && Utility.Encryption.SHA1.GenerateHashString(authPass) == servicePassword)
{
verified = true;
}
//
if (verified)
{
string url = request.RawUrl.TrimStart('/').TrimStart('\\').TrimStart('.');
if (url.IndexOf("?") > 0)
{
url = url.Substring(0, url.IndexOf("?"));
}
// Check if this url is an alias
url = UrlAliasCheck(url.TrimEnd('/'));
//
// url aliasing check
if (url == "" || url.TrimEnd('/') == baseUrl.TrimEnd('/'))
{
// default home redirect
response.Redirect("/" + baseUrl.TrimEnd('/') + "/index.html");
//TODO: find a solution for HG homepage redirect ---> ?" + new TimeSpan(DateTime.UtcNow.Ticks).TotalMilliseconds + "#page_control");
response.Close();
}
else
{
var connectionWatch = Stopwatch.StartNew();
MigService.Log.Info(new MigEvent(this.GetName(), remoteAddress, "HTTP", request.HttpMethod,
$"{response.StatusCode} {request.RawUrl} [OPEN]"));
// this url is reserved for Server Sent Event stream
if (url.TrimEnd('/').Equals("events"))
{
HandleEventsRoute(request, response, context, remoteAddress);
}
else
{
try
{
MigClientRequest migRequest = null;
if (url.StartsWith("api/"))
{
string message = url.Substring(url.IndexOf('/', 1) + 1);
var migContext = new MigContext(ContextSource.WebServiceGateway, context);
migRequest = new MigClientRequest(migContext, new MigInterfaceCommand(message));
// Disable HTTP caching
response.Headers.Set(HttpResponseHeader.CacheControl, "no-cache, no-store, must-revalidate");
response.Headers.Set(HttpResponseHeader.Pragma, "no-cache");
response.Headers.Set(HttpResponseHeader.Expires, "0");
// Store POST data (if any) in the migRequest.RequestData field
migRequest.RequestData = WebServiceUtility.ReadToEnd(request.InputStream);
migRequest.RequestText = request.ContentEncoding.GetString(migRequest.RequestData);
}
OnPreProcessRequest(migRequest);
bool requestHandled = migRequest != null && migRequest.Handled;
if (requestHandled)
{
SendResponseObject(context, migRequest.ResponseData);
}
else if (url.StartsWith(baseUrl) || baseUrl.Equals("/"))
{
// If request begins <base_url>, process as standard Web request
string requestedFile = GetWebFilePath(url);
if (!File.Exists(requestedFile))
{
response.StatusCode = (int)HttpStatusCode.NotFound;
WebServiceUtility.WriteStringToContext(context, $"<h1>404 - Not Found</h1><br/>{requestedFile}");
}
else
{
bool isText = false;
if (url.ToLower().EndsWith(".js")) // || requestedurl.EndsWith(".json"))
{
response.ContentType = "text/javascript";
isText = true;
}
else if (url.ToLower().EndsWith(".css"))
{
response.ContentType = "text/css";
isText = true;
}
else if (url.ToLower().EndsWith(".zip"))
{
response.ContentType = "application/zip";
}
else if (url.ToLower().EndsWith(".png"))
{
response.ContentType = "image/png";
}
else if (url.ToLower().EndsWith(".jpg"))
{
response.ContentType = "image/jpeg";
}
else if (url.ToLower().EndsWith(".gif"))
{
response.ContentType = "image/gif";
}
else if (url.ToLower().EndsWith(".svg"))
{
response.ContentType = "image/svg+xml";
}
else if (url.ToLower().EndsWith(".mp3"))
{
response.ContentType = "audio/mp3";
}
else if (url.ToLower().EndsWith(".wav"))
{
response.ContentType = "audio/x-wav";
}
else if (url.ToLower().EndsWith(".appcache"))
{
response.ContentType = "text/cache-manifest";
}
else if (url.ToLower().EndsWith(".otf") || url.ToLower().EndsWith(".ttf") || url.ToLower().EndsWith(".woff") || url.ToLower().EndsWith(".woff2"))
{
response.ContentType = "application/octet-stream";
}
else if (url.ToLower().EndsWith(".xml"))
{
response.ContentType = "text/xml";
isText = true;
}
else
{
response.ContentType = "text/html";
isText = true;
}
var file = new FileInfo(requestedFile);
response.ContentLength64 = file.Length;
bool modified = true;
if (request.Headers.AllKeys.Contains("If-Modified-Since"))
{
var modifiedSince = DateTime.MinValue;
DateTime.TryParse(request.Headers["If-Modified-Since"], out modifiedSince);
if (file.LastWriteTime.ToUniversalTime().Equals(modifiedSince))
{
modified = false;
}
}
bool disableCacheControl = HttpCacheIgnoreCheck(url);
if (!modified && !disableCacheControl)
{
// TODO: !IMPORTANT! exclude from caching files that contains SSI tags!
response.StatusCode = (int)HttpStatusCode.NotModified;
//!!DISABLED!! - The following line was preventing browser to load file from cache
//response.Headers.Set(HttpResponseHeader.Date, file.LastWriteTimeUtc.ToString().Replace(",", "."));
}
else
{
response.Headers.Set(HttpResponseHeader.LastModified, file.LastWriteTimeUtc.ToString().Replace(",", "."));
if (disableCacheControl)
{
response.Headers.Set(HttpResponseHeader.CacheControl, "no-cache, no-store, must-revalidate");
response.Headers.Set(HttpResponseHeader.Pragma, "no-cache");
response.Headers.Set(HttpResponseHeader.Expires, "0");
}
else
{
response.Headers.Set(HttpResponseHeader.CacheControl, "max-age=86400");
}
// PRE PROCESS text output
if (isText)
{
try
{
WebFile webFile = GetWebFile(requestedFile);
response.ContentEncoding = webFile.Encoding;
response.ContentType += "; charset=" + webFile.Encoding.BodyName;
// We don't need to parse the content again if it's coming from the cache
if (!webFile.IsCached)
{
string body = webFile.Content;
if (requestedFile.EndsWith(".md"))
{
// Built-in Markdown files support
body = CommonMarkConverter.Convert(body);
// TODO: add a way to include HTML header and footer template to be appended to the
// TODO: translated markdown text
}
else
{
// HTML file
// replace prepocessor directives with values
bool tagFound;
do
{
tagFound = false;
var ts = body.IndexOf("{include ");
if (ts >= 0)
{
var te = body.IndexOf("}", ts);
if (te > ts)
{
var rs = body.Substring(ts + (te - ts) + 1);
var cs = body.Substring(ts, te - ts + 1);
var ls = body.Substring(0, ts);
//
try
{
if (cs.StartsWith("{include "))
{
var fileName = cs.Substring(9).TrimEnd('}').Trim();
fileName = GetWebFilePath(fileName);
var fileEncoding = DetectWebFileEncoding(fileName) ??
defaultWebFileEncoding;
var incFile = File.ReadAllText(fileName, fileEncoding) + rs;
body = ls + incFile;
}
}
catch
{
body = ls + "<h5 style=\"color:red\">Error processing '" + cs.Replace("{", "[").Replace("}", "]") + "'</h5>" + rs;
}
tagFound = true;
}
}
} while (tagFound); // continue if a pre processor tag was found
// {hostos}
body = body.Replace("{hostos}", Environment.OSVersion.Platform.ToString());
// {filebase}
body = body.Replace("{filebase}", Path.GetFileNameWithoutExtension(requestedFile));
}
// update the cache content with parsing results
webFile.Content = body;
}
// Store the cache item if the file cache is enabled
if (enableFileCache)
{
UpdateWebFileCache(requestedFile, webFile.Content, response.ContentEncoding);
}
//
WebServiceUtility.WriteStringToContext(context, webFile.Content);
}
catch (Exception ex)
{
// TODO: report internal mig interface error
response.StatusCode = (int)HttpStatusCode.InternalServerError;
WebServiceUtility.WriteStringToContext(context, ex.Message + "\n" + ex.StackTrace);
MigService.Log.Error(ex);
}
}
else
{
WebServiceUtility.WriteBytesToContext(context, File.ReadAllBytes(requestedFile));
}
}
}
requestHandled = true;
}
OnPostProcessRequest(migRequest);
if (!requestHandled && migRequest != null && migRequest.Handled)
{
SendResponseObject(context, migRequest.ResponseData);
}
else if (!requestHandled)
{
response.StatusCode = (int)HttpStatusCode.NotFound;
WebServiceUtility.WriteStringToContext(context, "<h1>404 - Not Found</h1>");
}
}
catch (Exception eh)
{
// TODO: add error logging
Console.Error.WriteLine(eh);
}
}
connectionWatch.Stop();
logExtras = " [CLOSED AFTER " + Math.Round(connectionWatch.Elapsed.TotalSeconds, 3) + " seconds]";
}
}
else
{
response.StatusCode = (int)HttpStatusCode.Unauthorized;
// this will only work in Linux (mono)
//response.Headers.Set(HttpResponseHeader.WwwAuthenticate, "Basic");
// this works both on Linux and Windows
response.AddHeader("WWW-Authenticate", "Basic realm=\"User Visible Realm\"");
}
}
else
{
response.StatusCode = (int)HttpStatusCode.Unauthorized;
// this will only work in Linux (mono)
//response.Headers.Set(HttpResponseHeader.WwwAuthenticate, "Basic");
// this works both on Linux and Windows
response.AddHeader("WWW-Authenticate", "Basic realm=\"User Visible Realm\"");
}
MigService.Log.Info(new MigEvent(this.GetName(), remoteAddress, "HTTP", request.HttpMethod,
$"{response.StatusCode} {request.RawUrl}{logExtras}"));
}
catch (Exception ex)
{
MigService.Log.Error(ex);
}
finally
{
//
// CleanUp/Dispose allocated resources
//
try { request.InputStream.Close(); } catch {
// TODO: add logging
}
try { response.OutputStream.Close(); } catch {
// TODO: add logging
}
try { response.Close(); } catch {
// TODO: add logging
}
try { response.Abort(); } catch {
// TODO: add logging
}
}
}
private void UpdateWebFileCache(string file, string content, Encoding encoding)
{
var cachedItem = filesCache.Find(wfc => wfc.FilePath == file);
if (cachedItem == null)
{
cachedItem = new WebFile();
filesCache.Add(cachedItem);
}
cachedItem.FilePath = file;
cachedItem.Content = content;
cachedItem.Encoding = encoding;
cachedItem.IsCached = true;
}
private WebFile GetWebFile(string file)
{
WebFile fileItem = new WebFile(), cachedItem = null;
try
{
cachedItem = filesCache.Find(wfc => wfc.FilePath == file);
}
catch (Exception ex)
{
//TODO: sometimes the Find method fires an "object reference not set" error (who knows why???)
MigService.Log.Error(ex);
// clear possibly corrupted cache items
ClearWebCache();
}
//
if (cachedItem != null && (DateTime.Now - cachedItem.Timestamp).TotalSeconds < 600)
{
fileItem = cachedItem;
}
else
{
Encoding fileEncoding = DetectWebFileEncoding(file); //TextFileEncodingDetector.DetectTextFileEncoding(file);
if (fileEncoding == null)
fileEncoding = defaultWebFileEncoding;
fileItem.Content = System.IO.File.ReadAllText(file, fileEncoding); //Encoding.UTF8.GetString(buffer, 0, buffer.Length);
fileItem.Encoding = fileEncoding;
if (cachedItem != null)
{
filesCache.Remove(cachedItem);
}
}
return fileItem;
}
private void Worker(object state)
{
HttpListenerRequest request = null;
HttpListenerResponse response = null;
try
{
var context = state as HttpListenerContext;
//
request = context.Request;
response = context.Response;
//
if (request.UserLanguages != null && request.UserLanguages.Length > 0)
{
try
{
CultureInfo culture = CultureInfo.CreateSpecificCulture(request.UserLanguages[0].ToLowerInvariant().Trim());
Thread.CurrentThread.CurrentCulture = culture;
Thread.CurrentThread.CurrentUICulture = culture;
}
catch
{
}
}
//
if (request.IsSecureConnection)
{
var clientCertificate = request.GetClientCertificate();
X509Chain chain = new X509Chain();
chain.ChainPolicy.RevocationMode = X509RevocationMode.NoCheck;
chain.Build(clientCertificate);
if (chain.ChainStatus.Length != 0)
{
// Invalid certificate
response.StatusCode = (int)HttpStatusCode.Unauthorized;
response.OutputStream.Close();
return;
}
}
//
response.Headers.Set(HttpResponseHeader.Server, "MIG WebService Gateway");
response.KeepAlive = false;
//
bool isAuthenticated = (request.Headers["Authorization"] != null);
string remoteAddress = request.RemoteEndPoint.Address.ToString();
string logExtras = "";
//
if (servicePassword == "" || isAuthenticated) //request.IsAuthenticated)
{
bool verified = false;
//
string authUser = "";
string authPass = "";
//
//NOTE: context.User.Identity and request.IsAuthenticated
//aren't working under MONO with this code =/
//so we proceed by manually parsing Authorization header
//
//HttpListenerBasicIdentity identity = null;
//
if (isAuthenticated)
{
//identity = (HttpListenerBasicIdentity)context.User.Identity;
// authuser = identity.Name;
// authpass = identity.Password;
byte[] encodedDataAsBytes = System.Convert.FromBase64String(request.Headers["Authorization"].Split(' ')[1]);
string authtoken = System.Text.Encoding.UTF8.GetString(encodedDataAsBytes);
authUser = authtoken.Split(':')[0];
authPass = authtoken.Split(':')[1];
}
//
//TODO: complete authorization (for now with one fixed user 'admin', add multiuser support)
//
if (servicePassword == "" || (authUser == serviceUsername && Utility.Encryption.SHA1.GenerateHashString(authPass) == servicePassword))
{
verified = true;
}
//
if (verified)
{
string url = request.RawUrl.TrimStart('/').TrimStart('\\').TrimStart('.');
if (url.IndexOf("?") > 0)
{
url = url.Substring(0, url.IndexOf("?"));
}
// Check if this url is an alias
url = UrlAliasCheck(url.TrimEnd('/'));
//
// url aliasing check
if (url == "" || url.TrimEnd('/') == baseUrl.TrimEnd('/'))
{
// default home redirect
response.Redirect("/" + baseUrl.TrimEnd('/') + "/index.html");
//TODO: find a solution for HG homepage redirect ---> ?" + new TimeSpan(DateTime.UtcNow.Ticks).TotalMilliseconds + "#page_control");
response.Close();
}
else
{
var connectionWatch = Stopwatch.StartNew();
MigService.Log.Info(new MigEvent(this.GetName(), remoteAddress, "HTTP", request.HttpMethod.ToString(), String.Format("{0} {1} [OPEN]", response.StatusCode, request.RawUrl)));
// this url is reserved for Server Sent Event stream
if (url.TrimEnd('/').Equals("events"))
{
// TODO: move all of this to a separate function
// Server sent events
// NOTE: no PreProcess or PostProcess events are fired in this case
//response.KeepAlive = true;
response.ContentEncoding = Encoding.UTF8;
response.ContentType = "text/event-stream";
response.Headers.Set(HttpResponseHeader.CacheControl, "no-cache, no-store, must-revalidate");
response.Headers.Set(HttpResponseHeader.Pragma, "no-cache");
response.Headers.Set("Access-Control-Allow-Origin", "*");
// 2K padding for IE
var padding = ":" + new String(' ', 2048) + "\n";
byte[] paddingData = System.Text.Encoding.UTF8.GetBytes(padding);
response.OutputStream.Write(paddingData, 0, paddingData.Length);
byte[] retryData = System.Text.Encoding.UTF8.GetBytes("retry: 1000\n");
response.OutputStream.Write(retryData, 0, retryData.Length);
DateTime lastTimeStamp = DateTime.UtcNow;
var lastId = context.Request.Headers.Get("Last-Event-ID");
if (lastId == null || lastId == "")
{
var queryValues = HttpUtility.ParseQueryString(context.Request.Url.Query);
lastId = queryValues.Get("lastEventId");
}
if (lastId != null && lastId != "")
{
double unixTimestamp = 0;
double.TryParse(lastId, NumberStyles.Float | NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out unixTimestamp);
if (unixTimestamp != 0)
{
lastTimeStamp = new DateTime(1970, 1, 1, 0, 0, 0, 0, System.DateTimeKind.Utc);
lastTimeStamp.AddSeconds(Math.Round(unixTimestamp / 1000d));
}
}
bool connected = true;
var timeoutWatch = Stopwatch.StartNew();
while (connected)
{
// dirty work around for signaling new event and
// avoiding locks on long socket timetout
lock (sseEventToken)
Monitor.Wait(sseEventToken, 1000);
// safely dequeue events
List <SseEvent> bufferedData;
do
{
bufferedData = sseEventBuffer.FindAll(le => le != null && le.Timestamp.Ticks > lastTimeStamp.Ticks);
if (bufferedData.Count > 0)
{
foreach (SseEvent entry in bufferedData)
{
// send events
try
{
// The following throws an error on some mono-arm (Input string was not in the correct format)
// entry.Event.UnixTimestamp.ToString("R", CultureInfo.InvariantCulture)
byte[] data = System.Text.Encoding.UTF8.GetBytes("id: " + entry.Event.UnixTimestamp.ToString().Replace(",", ".") + "\ndata: " + MigService.JsonSerialize(entry.Event) + "\n\n");
response.OutputStream.Write(data, 0, data.Length);
//response.OutputStream.Flush();
lastTimeStamp = entry.Timestamp;
}
catch (Exception e)
{
MigService.Log.Info(new MigEvent(this.GetName(), remoteAddress, "HTTP", request.HttpMethod.ToString(), String.Format("{0} {1} [ERROR: {2}]", response.StatusCode, request.RawUrl, e.Message)));
connected = false;
break;
}
}
Thread.Sleep(100);
}
// there might be new data after sending
} while (connected && bufferedData.Count > 0);
// check if the remote end point is still alive every 15 seconds or so
if (timeoutWatch.Elapsed.TotalSeconds > 15)
{
connected = connected && IsRemoteEndPointConnected(request.RemoteEndPoint);
timeoutWatch.Stop();
timeoutWatch = Stopwatch.StartNew();
}
}
}
else
{
try
{
MigClientRequest migRequest = null;
if (url.StartsWith("api/"))
{
string message = url.Substring(url.IndexOf('/', 1) + 1);
var migContext = new MigContext(ContextSource.WebServiceGateway, context);
migRequest = new MigClientRequest(migContext, new MigInterfaceCommand(message));
// Disable HTTP caching
response.Headers.Set(HttpResponseHeader.CacheControl, "no-cache, no-store, must-revalidate");
response.Headers.Set(HttpResponseHeader.Pragma, "no-cache");
response.Headers.Set(HttpResponseHeader.Expires, "0");
// Store POST data (if any) in the migRequest.RequestData field
migRequest.RequestData = WebServiceUtility.ReadToEnd(request.InputStream);
migRequest.RequestText = request.ContentEncoding.GetString(migRequest.RequestData);
}
OnPreProcessRequest(migRequest);
bool requestHandled = (migRequest != null && migRequest.Handled);
if (requestHandled)
{
SendResponseObject(context, migRequest.ResponseData);
}
else if (url.StartsWith(baseUrl) || baseUrl.Equals("/"))
{
// If request begins <base_url>, process as standard Web request
string requestedFile = GetWebFilePath(url);
if (!System.IO.File.Exists(requestedFile))
{
response.StatusCode = (int)HttpStatusCode.NotFound;
WebServiceUtility.WriteStringToContext(context, "<h1>404 - Not Found</h1>");
}
else
{
bool isText = false;
if (url.ToLower().EndsWith(".js")) // || requestedurl.EndsWith(".json"))
{
response.ContentType = "text/javascript";
isText = true;
}
else if (url.ToLower().EndsWith(".css"))
{
response.ContentType = "text/css";
isText = true;
}
else if (url.ToLower().EndsWith(".zip"))
{
response.ContentType = "application/zip";
}
else if (url.ToLower().EndsWith(".png"))
{
response.ContentType = "image/png";
}
else if (url.ToLower().EndsWith(".jpg"))
{
response.ContentType = "image/jpeg";
}
else if (url.ToLower().EndsWith(".gif"))
{
response.ContentType = "image/gif";
}
else if (url.ToLower().EndsWith(".svg"))
{
response.ContentType = "image/svg+xml";
}
else if (url.ToLower().EndsWith(".mp3"))
{
response.ContentType = "audio/mp3";
}
else if (url.ToLower().EndsWith(".wav"))
{
response.ContentType = "audio/x-wav";
}
else if (url.ToLower().EndsWith(".appcache"))
{
response.ContentType = "text/cache-manifest";
}
else if (url.ToLower().EndsWith(".otf") || url.ToLower().EndsWith(".ttf") || url.ToLower().EndsWith(".woff") || url.ToLower().EndsWith(".woff2"))
{
response.ContentType = "application/octet-stream";
}
else if (url.ToLower().EndsWith(".xml"))
{
response.ContentType = "text/xml";
isText = true;
}
else
{
response.ContentType = "text/html";
isText = true;
}
var file = new System.IO.FileInfo(requestedFile);
response.ContentLength64 = file.Length;
bool modified = true;
if (request.Headers.AllKeys.Contains("If-Modified-Since"))
{
var modifiedSince = DateTime.MinValue;
DateTime.TryParse(request.Headers["If-Modified-Since"], out modifiedSince);
if (file.LastWriteTime.ToUniversalTime().Equals(modifiedSince))
{
modified = false;
}
}
bool disableCacheControl = HttpCacheIgnoreCheck(url);
if (!modified && !disableCacheControl)
{
// TODO: !IMPORTANT! exclude from caching files that contains SSI tags!
response.StatusCode = (int)HttpStatusCode.NotModified;
//!!DISABLED!! - The following line was preventing browser to load file from cache
//response.Headers.Set(HttpResponseHeader.Date, file.LastWriteTimeUtc.ToString().Replace(",", "."));
}
else
{
response.Headers.Set(HttpResponseHeader.LastModified, file.LastWriteTimeUtc.ToString().Replace(",", "."));
if (disableCacheControl)
{
response.Headers.Set(HttpResponseHeader.CacheControl, "no-cache, no-store, must-revalidate");
response.Headers.Set(HttpResponseHeader.Pragma, "no-cache");
response.Headers.Set(HttpResponseHeader.Expires, "0");
}
else
{
response.Headers.Set(HttpResponseHeader.CacheControl, "max-age=86400");
}
// PRE PROCESS text output
if (isText)
{
try
{
WebFile webFile = GetWebFile(requestedFile);
response.ContentEncoding = webFile.Encoding;
response.ContentType += "; charset=" + webFile.Encoding.BodyName;
// We don't need to parse the content again if it's coming from the cache
if (!webFile.IsCached)
{
string body = webFile.Content;
if (requestedFile.EndsWith(".md"))
{
// Built-in Markdown files support
body = CommonMark.CommonMarkConverter.Convert(body);
// TODO: add a way to include HTML header and footer template to be appended to the
// TODO: translated markdown text
}
else
{
// HTML file
// replace prepocessor directives with values
bool tagFound;
do
{
tagFound = false;
int ts = body.IndexOf("{include ");
if (ts >= 0)
{
int te = body.IndexOf("}", ts);
if (te > ts)
{
string rs = body.Substring(ts + (te - ts) + 1);
string cs = body.Substring(ts, te - ts + 1);
string ls = body.Substring(0, ts);
//
try
{
if (cs.StartsWith("{include "))
{
string fileName = cs.Substring(9).TrimEnd('}').Trim();
fileName = GetWebFilePath(fileName);
//
Encoding fileEncoding = DetectWebFileEncoding(fileName);
if (fileEncoding == null)
{
fileEncoding = defaultWebFileEncoding;
}
var incFile = System.IO.File.ReadAllText(fileName, fileEncoding) + rs;
body = ls + incFile;
}
}
catch
{
body = ls + "<h5 style=\"color:red\">Error processing '" + cs.Replace("{", "[").Replace("}", "]") + "'</h5>" + rs;
}
tagFound = true;
}
}
} while (tagFound); // continue if a pre processor tag was found
// {hostos}
body = body.Replace("{hostos}", Environment.OSVersion.Platform.ToString());
// {filebase}
body = body.Replace("{filebase}", Path.GetFileNameWithoutExtension(requestedFile));
}
// update the cache content with parsing results
webFile.Content = body;
}
// Store the cache item if the file cache is enabled
if (enableFileCache)
{
UpdateWebFileCache(requestedFile, webFile.Content, response.ContentEncoding);
}
//
WebServiceUtility.WriteStringToContext(context, webFile.Content);
}
catch (Exception ex)
{
// TODO: report internal mig interface error
response.StatusCode = (int)HttpStatusCode.InternalServerError;
WebServiceUtility.WriteStringToContext(context, ex.Message + "\n" + ex.StackTrace);
MigService.Log.Error(ex);
}
}
else
{
WebServiceUtility.WriteBytesToContext(context, System.IO.File.ReadAllBytes(requestedFile));
}
}
}
requestHandled = true;
}
OnPostProcessRequest(migRequest);
if (!requestHandled && migRequest != null && migRequest.Handled)
{
SendResponseObject(context, migRequest.ResponseData);
}
else if (!requestHandled)
{
response.StatusCode = (int)HttpStatusCode.NotFound;
WebServiceUtility.WriteStringToContext(context, "<h1>404 - Not Found</h1>");
}
}
catch (Exception eh)
{
// TODO: add error logging
Console.Error.WriteLine(eh);
}
}
connectionWatch.Stop();
logExtras = " [CLOSED AFTER " + Math.Round(connectionWatch.Elapsed.TotalSeconds, 3) + " seconds]";
}
}
else
{
response.StatusCode = (int)HttpStatusCode.Unauthorized;
// this will only work in Linux (mono)
//response.Headers.Set(HttpResponseHeader.WwwAuthenticate, "Basic");
// this works both on Linux and Windows
//response.AddHeader("WWW-Authenticate", "Basic");
}
}
else
{
response.StatusCode = (int)HttpStatusCode.Unauthorized;
// this will only work in Linux (mono)
//response.Headers.Set(HttpResponseHeader.WwwAuthenticate, "Basic");
// this works both on Linux and Windows
//response.AddHeader("WWW-Authenticate", "Basic");
}
MigService.Log.Info(new MigEvent(this.GetName(), remoteAddress, "HTTP", request.HttpMethod.ToString(), String.Format("{0} {1}{2}", response.StatusCode, request.RawUrl, logExtras)));
}
catch (Exception ex)
{
MigService.Log.Error(ex);
}
finally
{
//
// CleanUp/Dispose allocated resources
//
try { request.InputStream.Close(); } catch {
// TODO: add logging
}
try { response.OutputStream.Close(); } catch {
// TODO: add logging
}
try { response.Close(); } catch {
// TODO: add logging
}
try { response.Abort(); } catch {
// TODO: add logging
}
}
}