Merge pull request 'Title and description extraction now only look in the head section of the HTML document' (#40 ) from OptimizeTitleAndDescriptionExtraction into main

Reviewed-on: #40
Title and description extraction now only look in the head section of the HTML document
2024-12-23 13:10:49 +00:00 · 2024-12-23 14:09:51 +01:00 · 2024-12-21 21:19:28 +00:00 · 2024-12-21 21:57:01 +01:00 · 2024-12-19 17:37:01 +00:00 · 2024-12-19 18:36:13 +01:00
11 changed files with 102 additions and 68 deletions
@@ -16,6 +16,7 @@
    
    <ItemGroup>
      <PackageReference Include="FuzzySharp" Version="2.0.2" />
+      <PackageReference Include="HtmlAgilityPack" Version="1.11.71" />
      <PackageReference Include="NetMQ" Version="4.0.1.13" />
    </ItemGroup>
    
@@ -161,41 +161,37 @@ public class ContentFilter
        
        for (int i = 0; i < ports.Length; i++)
        {
-            string? html = "";
-            
            if (ports[i] == 80)
            {
                if (string.IsNullOrWhiteSpace(url1)) continue;
-
+                
                try
                {
-                    html = HttpClientHelper.GetHtml(url1, 80).GetAwaiter().GetResult();
+                    (string, string) temp = HttpClientHelper.GetTitleAndDescription(url1, 80).GetAwaiter().GetResult();
+                    title1 = temp.Item1;
+                    description1 = temp.Item2;
                }
-                catch (Exception e)
+                catch
                {
-                    Console.WriteLine(e);
+                    //
                }
            }
            else
            {
                if (string.IsNullOrWhiteSpace(url2)) continue;
-
+                
                try
                {
-                    html = HttpClientHelper.GetHtml(url2, 443).GetAwaiter().GetResult();
+                    (string, string) temp = HttpClientHelper.GetTitleAndDescription(url1, 443).GetAwaiter().GetResult();
+                    title2 = temp.Item1;
+                    description2 = temp.Item2;
                }
-                catch (Exception e)
+                catch
                {
-                    Console.WriteLine(e);
+                    //
                }
            }
            
-            if (string.IsNullOrWhiteSpace(html)) continue;
-            
-            if (ports[i] == 80 && string.IsNullOrWhiteSpace(title1)) { FilterHelper.GetTitle(html, out title1); }
-            if (ports[i] == 443 && string.IsNullOrWhiteSpace(title2)) { FilterHelper.GetTitle(html ,out title2); }
-            if (ports[i] == 80 && string.IsNullOrWhiteSpace(description1)) { FilterHelper.GetDescription(html, out description1); }
-            if (ports[i] == 443 && string.IsNullOrWhiteSpace(description2)) { FilterHelper.GetDescription(html, out description2); }
            if (ports[i] == 80 && !robotsTxt1) { robotsTxt1 = HttpClientHelper.HasRobotsTxt(url1, 80).GetAwaiter().GetResult(); }
            if (ports[i] == 443 && !robotsTxt2) { robotsTxt2 = HttpClientHelper.HasRobotsTxt(url2, 443).GetAwaiter().GetResult(); }
        }
@@ -1,10 +1,18 @@
-using System.Diagnostics;
+using System.Text.RegularExpressions;
+using HtmlAgilityPack;

 namespace Backend.Helper;

-public static class HttpClientHelper
+public static partial class HttpClientHelper
 {
-    public static async Task<string> GetHtml(string url, int port)
+    // Reddit, for example, will block the GET request if you don't have a user agent.
+    private const string UserAgentHeader = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36";
+    private const string TitlePattern = "<title>(.*)</title>";
+    private const string DescriptionPattern = "<meta name=\"description\" content=\"(.*?)\"";
+    private const string StartHeadTag = "<head>";
+    private const string EndHeadTag = "</head>";
+    
+    public static async Task<(string, string)> GetTitleAndDescription(string url, int port)
    {
        using HttpClient client = new();
        
@@ -18,7 +26,8 @@ public static class HttpClientHelper
        }
        
        client.DefaultRequestHeaders.Accept.Clear();
-        client.Timeout = TimeSpan.FromSeconds(1);
+        client.DefaultRequestHeaders.UserAgent.ParseAdd(UserAgentHeader);
+        client.Timeout = TimeSpan.FromSeconds(30);
        
        HttpResponseMessage? response;
        
@@ -28,15 +37,48 @@ public static class HttpClientHelper
        }
        catch
        {
-            return "";
+            return ("", "");
        }
        
        if (!response.IsSuccessStatusCode)
        {
-            return "";
+            return ("", "");
+        }
+
+        string html = await response.Content.ReadAsStringAsync();
+        
+        int firstIndex = 0;
+        int lastIndex = 0;
+        
+        if (html.Contains(StartHeadTag) && html.Contains(EndHeadTag))
+        {
+            firstIndex = html.IndexOf(StartHeadTag, StringComparison.Ordinal);
+            lastIndex = html.IndexOf(EndHeadTag, StringComparison.Ordinal);
        }
        
-        return await response.Content.ReadAsStringAsync();
+        string head = html.AsSpan().Slice(firstIndex, lastIndex).ToString();
+        html = "";
+        
+        string title = "";
+        string description = "";
+        
+        Regex titleRegex = TitleRegEx();
+        Match titleMatch = titleRegex.Match(head);
+        
+        if (titleMatch.Success)
+        {
+            title = titleMatch.Groups[1].Value;
+        }
+        
+        Regex descriptionRegex = DexcriptionRegEx();
+        Match descriptionMatch = descriptionRegex.Match(head);
+        
+        if (descriptionMatch.Success)
+        {
+            description = descriptionMatch.Groups[1].Value;
+        }
+        
+        return (title, description);
    }
    
    public static async Task<bool> HasRobotsTxt(string url, int port)
@@ -53,12 +95,13 @@ public static class HttpClientHelper
        }
        
        client.DefaultRequestHeaders.Accept.Clear();
-        client.Timeout = TimeSpan.FromSeconds(1);
+        client.DefaultRequestHeaders.UserAgent.ParseAdd(UserAgentHeader);
+        client.Timeout = TimeSpan.FromSeconds(30);
        
        HttpResponseMessage? response = null;
        
        try
-        {//
+        {
            response = await client.SendAsync(new(HttpMethod.Head, "/robots.txt"));
        }
        catch
@@ -68,4 +111,9 @@ public static class HttpClientHelper
        
        return response is not null && response.IsSuccessStatusCode;
    }
+
+    [GeneratedRegex(TitlePattern)]
+    private static partial Regex TitleRegEx();
+    [GeneratedRegex(DescriptionPattern)]
+    private static partial Regex DexcriptionRegEx();
 }
@@ -2,6 +2,7 @@ using System.Text.Json;
 using System.Text.Json.Serialization;
 using AspNetCoreRateLimit;
 using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.Extensions.Caching.Memory;
 using Models.Model.External;
 using NetMQ;
 using NetMQ.Sockets;
@@ -19,23 +20,7 @@ builder.Services.AddCors(options =>
    options.AddPolicy(name: myAllowSpecificOrigins, x => x.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());
 });

-// Add memory cache and rate limiting services
-builder.Services.AddMemoryCache();
-builder.Services.Configure<IpRateLimitOptions>(options =>
-{
-    options.GeneralRules =
-    [
-        new()
-        {
-            Endpoint = "*", // Apply to all endpoints
-            Period = "10s", // Rate limiting window of 10 second
-            Limit = 5 // Maximum 5 requests per 10 seconds
-        }
-    ];
-});
-
-builder.Services.AddInMemoryRateLimiting();
-builder.Services.AddSingleton<IRateLimitConfiguration, RateLimitConfiguration>();
+builder.Services.AddMemoryCache(options => options.ExpirationScanFrequency = TimeSpan.FromSeconds(5));

 WebApplication app = builder.Build();

@@ -44,14 +29,17 @@ app.UseForwardedHeaders(new()
    ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
 });

-
-app.UseIpRateLimiting(); // Apply IP-based rate limiting middleware
-
 app.UseCors(myAllowSpecificOrigins);

 RouteGroupBuilder progressApi = app.MapGroup("/progress");
-progressApi.MapGet("/", () =>
+progressApi.MapGet("/", (IMemoryCache memoryCache) =>
 {
+    const string cacheKey = "progress_status";
+    if (memoryCache.TryGetValue(cacheKey, out ScanningStatus scanningStatus))
+    {
+        return scanningStatus;
+    }
+    
    CommunicationObject communicationObject = new()
    {
        Command = CommunicationCommand.GetScanningProgress
@@ -65,7 +53,11 @@ progressApi.MapGet("/", () =>
    byte[] msg = client.ReceiveFrameBytes();
    client.Close();
    
-    return JsonSerializer.Deserialize<ScanningStatus>(msg);
+    scanningStatus = JsonSerializer.Deserialize<ScanningStatus>(msg);
+    
+    memoryCache.Set(cacheKey, scanningStatus, DateTimeOffset.Now.AddSeconds(5));
+    
+    return scanningStatus;
 });

 /*
@@ -8,8 +8,6 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Manager", "Manager\Manager.
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Proxy", "Proxy\Proxy.csproj", "{55208481-5203-4B25-A20D-4EF644F76773}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Shared", "Shared\Shared.csproj", "{DEB1411C-F45A-40DA-92F8-D9B9929DBA5B}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -32,9 +30,5 @@ Global
 		{55208481-5203-4B25-A20D-4EF644F76773}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{55208481-5203-4B25-A20D-4EF644F76773}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{55208481-5203-4B25-A20D-4EF644F76773}.Release|Any CPU.Build.0 = Release|Any CPU
-		{DEB1411C-F45A-40DA-92F8-D9B9929DBA5B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{DEB1411C-F45A-40DA-92F8-D9B9929DBA5B}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{DEB1411C-F45A-40DA-92F8-D9B9929DBA5B}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{DEB1411C-F45A-40DA-92F8-D9B9929DBA5B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal
@@ -1,7 +1,11 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003A02000002pdb1Low_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FDecompilerCache_003FILViewer_003F51b607df472a454cb6ed940749bbfdfd6000_003Fde_003F2c578873_003F02000002pdb1Low_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003A02000009pdb7Low_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FDecompilerCache_003FILViewer_003Fbbcfe225942e4131bc589e82ae4b92ab9800_003Fc0_003Fa20d693d_003F02000009pdb7Low_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003A0200000Cpdb6Low_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FDecompilerCache_003FILViewer_003Fb53c196a821648e4ae3b142a6ae58d7b9400_003Fa8_003F21a43479_003F0200000Cpdb6Low_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AStartupExtensions_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003F3ce5d581dd9cc0e4cdfd914e797ba2da05e894767d76b86f0515ef5226bac_003FStartupExtensions_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AString_002ESearching_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003F49ee52518952e16b89adee3d6c9346ae6c74be268730f0497eb14b34b49d56c_003FString_002ESearching_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
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@@ -1,5 +0,0 @@
-namespace Shared;
-
-public class Class1
-{
-}
@@ -1,9 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-    <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
-        <ImplicitUsings>enable</ImplicitUsings>
-        <Nullable>enable</Nullable>
-    </PropertyGroup>
-
-</Project>
@@ -1,3 +1,13 @@
+<script setup lang="ts">
+useHead({
+  title: 'Rasmus Search Engine',
+  meta: [
+    { name: 'description', content: 'Just a search engine for fun' },
+    { name: 'lang', content: 'en'}
+  ]
+})
+</script>
+
 <template>
  <NuxtLayout>
    <NuxtPage page-key="static" />
@@ -14,5 +14,4 @@ export default defineNuxtConfig({
  },

  modules: ['@nuxtjs/tailwindcss', 'nuxt-purgecss'],
-
 });
@@ -7,6 +7,7 @@ const loading = ref<boolean>(true);
 const error = ref<string | null>(null);
 let dict = ref<ProgressDictionary[] | null>(null);

+
 const fetchMyData = async () => {
    try {
        loading.value = true;
@@ -21,6 +22,7 @@ const fetchMyData = async () => {
            },
            5 // Cache max age in seconds
        );
+
    } catch (err) {
        error.value = (err as Error).message;
    } finally {
@@ -34,6 +36,8 @@ const fetchMyData = async () => {

 fetchMyData();

+
+
 </script>

 <template>
Author	SHA1	Message	Date
owner	f4d94a3336	Merge pull request 'Title and description extraction now only look in the head section of the HTML document' (#40 ) from OptimizeTitleAndDescriptionExtraction into main Reviewed-on: #40	2024-12-23 13:10:49 +00:00
owner	e9fd738f1f	Title and description extraction now only look in the head section of the HTML document	2024-12-23 14:09:51 +01:00
owner	e581d947f8	Merge pull request 'Add user-agent' (#39 ) from AddUserAgent into main Reviewed-on: #39	2024-12-21 21:19:28 +00:00
owner	580d687f62	Add user-agent	2024-12-21 21:57:01 +01:00
owner	af7b385641	Merge pull request 'Add cached progress response' (#36 ) from ImplementAPICache into main Reviewed-on: #36	2024-12-19 17:37:01 +00:00
owner	7562bbf7d1	Add cached progress response	2024-12-19 18:36:13 +01:00
owner	ac645b01b9	Merge pull request 'OptimiseFrontend' (#35 ) from OptimiseFrontend into main Reviewed-on: #35	2024-12-18 13:28:03 +00:00
owner	97321492ba	Add headers	2024-12-18 14:27:31 +01:00
owner	23d0a8b978	Merge pull request 'UseDictionary' (#34 ) from UseDictionary into main Reviewed-on: #34	2024-12-17 20:33:08 +00:00