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73 lines
2.4 KiB
73 lines
2.4 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Web;
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using System.Text.RegularExpressions;
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using System.IO;
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using Microsoft.Win32;
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namespace FLocal.IISHandler.handlers {
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class StaticHandler : ISpecificHandler {
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private string[] requestParts;
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public StaticHandler(string[] requestParts) {
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this.requestParts = requestParts;
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}
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private static Dictionary<string, string> extension2mime = new Dictionary<string,string>();
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private static string getMimeByExtension(string extension) {
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if(!extension2mime.ContainsKey(extension)) {
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lock(extension2mime) {
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if(!extension2mime.ContainsKey(extension)) {
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RegistryKey regKey = Registry.ClassesRoot.OpenSubKey(extension);
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if (regKey != null && regKey.GetValue("Content Type") != null) {
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extension2mime[extension] = regKey.GetValue("Content Type").ToString();
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} else {
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return null;
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}
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}
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}
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}
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return extension2mime[extension];
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}
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public void Handle(WebContext context) {
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if(this.requestParts.Length < 2) {
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throw new HttpException(403, "listing not allowed");
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}
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Regex checker = new Regex("^[a-z][0-9a-z\\-]*(\\.[a-zA-Z]+)?$", RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Singleline);
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string path = "";
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for(int i=1; i<this.requestParts.Length; i++) {
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if(!checker.IsMatch(this.requestParts[i])) {
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throw new HttpException(400, "wrong url (checker='" + checker.ToString() + "'; string='" + this.requestParts[i] + "'");
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}
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path += FLocal.Common.Config.instance.DirSeparator + this.requestParts[i];
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}
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string fullPath = FLocal.Common.Config.instance.dataDir + "Static" + path;
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if(!File.Exists(fullPath)) {
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throw new HttpException(404, "not found");
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}
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FileInfo fileinfo = new FileInfo(fullPath);
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if(!fileinfo.FullName.StartsWith(FLocal.Common.Config.instance.dataDir + "Static")) {
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throw new HttpException(403, "forbidden");
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}
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string mime = getMimeByExtension(fileinfo.Extension);
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if(mime != null) {
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context.httpresponse.ContentType = mime;
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} else {
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throw new HttpException(403, "wrong file type");
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}
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context.httpresponse.CacheControl = HttpCacheability.Public.ToString();
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context.httpresponse.Expires = 1440;
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context.httpresponse.WriteFile(fileinfo.FullName);
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}
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}
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}
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