Refactor data providers and update abstractions

- Removed obsolete data providers: `AnchorCollectionDataProvider`, `ContentsDataProvider`, and others, consolidating logic into new composable providers.
- Added `ComposeDataProviders`, `SelectDataProvider`, and `RelationalDataProvider` for improved flexibility and reusability.
- Introduced `IManySelectionComposableDataProvider` interface to support multiple-node selection.
- Enhanced `UnitDownloader` with more robust progress tracking.
- Updated package references and project dependencies for consistency.
- Improved error handling in `StealthConfig` initialization for better fallback on browser drivers.
- Incremented project version to 2.4.5.

Beam.Abstractions/IComposableDataProvider.cs

@@ -0,0 +1,12 @@
+using HtmlAgilityPack;
+
+namespace Beam.Abstractions;
+
+public interface IComposableDataProvider : IComposableDataProvider<object> { }
+
+
+public interface IComposableDataProvider<out T> : IDataProvider<T> {
+    public T Get(HtmlNode node);
+    public HtmlNode? Select(HtmlDocument doc);
+    public HtmlNode? Select(HtmlNode node);
+}

Beam.Abstractions/IManySelectionComposableDataProvider.cs

@@ -0,0 +1,9 @@
+using HtmlAgilityPack;
+
+namespace Beam.Abstractions;
+
+public interface IManySelectionComposableDataProvider<out T> : IDataProvider<T> {
+    public T ManyGet(HtmlNode[] node);
+    public HtmlNode[]? SelectMany(HtmlDocument doc);
+    public HtmlNode[]? SelectMany(HtmlNode[] node);
+}

Beam.Api/ApiCall.cs

@@ -3,12 +3,14 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
+using System.Net.Http;
 using System.Net.Http.Json;
 using System.Text;
 using System.Text.Json;
+using System.Threading;
 using System.Threading.Tasks;
 
-namespace Beam {
+namespace Beam.Api; 
     public class ApiCall(HttpClient client, string uri, HttpMethod method, KeyValuePair<string, string[]>[] headers, object? requestData, object? body, params HashSet<HttpStatusCode> successCodes) {
         public HttpClient Client { get; } = client;
         public object? RequestData { get; } = requestData;
@@ -63,4 +65,3 @@ namespace Beam {
         public static async Task<ApiResponse> Get(HttpClient client, string url, ILoggerFactory factory)
             => await new ApiCall(client, url, HttpMethod.Get, [], null, null).GetResponse(factory.CreateLogger<ApiResponse>());
     }
-}

Beam.Api/ApiCallBuilder.cs

@@ -2,11 +2,12 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
+using System.Net.Http;
 using System.Reflection.PortableExecutable;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace Beam {
+namespace Beam.Api;
     public class ApiCallBuilder(HttpClient client) {
         HttpClient Client = client;
         string Uri;
@@ -77,4 +78,4 @@ namespace Beam {
             return new ApiCall(Client, Uri, Method, Headers.Select((x) => new KeyValuePair<string, string[]>(x.Key, x.Value.ToArray())).ToArray(), Data, Body, SuccessCodes);
         }
     }
-}
+

Beam.Api/ApiCalls.cs

@@ -1,9 +1,15 @@
 // ApiCalls.cs
+
+using System;
 using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
 using System.Net;
+using System.Threading;
+using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
 
-namespace Beam {
+namespace Beam.Api;
     /// <summary>
     /// Executes a batch of <see cref="ApiCall"/>s using either sequential or parallel strategy.
     /// </summary>
@@ -45,4 +51,4 @@ namespace Beam {
             return bag.OrderBy(x => x.idx).Select(x => x.res).ToList();
         }
     }
-}
+

Beam.Api/ApiCallsBuilder.cs

@@ -1,7 +1,10 @@
 // ApiCallsBuilder.cs
+
+using System;
+using System.Collections.Generic;
 using System.Net;
 
-namespace Beam {
+namespace Beam.Api;
     /// <summary>
     /// Fluent builder for <see cref="ApiCalls"/>.
     /// </summary>
@@ -44,4 +47,3 @@ namespace Beam {
             return new ApiCalls(_calls, _parallelism);
         }
     }
-}

Beam.Api/ApiResponse.cs

@@ -1,10 +1,15 @@
-using Microsoft.Extensions.Logging;
+using System;
+using System.IO;
+using Microsoft.Extensions.Logging;
 using System.Net;
+using System.Net.Http;
 using System.Net.Http.Json;
 using System.Text;
 using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
 
-namespace Beam { 
+namespace Beam.Api;
     /// <summary>
     /// Wrapper that lets the response body be read any number of times (even concurrently).
     /// </summary>
@@ -78,5 +83,4 @@ namespace Beam {
             if (!Is200) Logger?.LogWarning("Non-success response; attempting to read content.");
             return Task.FromResult<Stream>(new MemoryStream(_buffer, writable: false));
         }
-    }
 }

Beam.Api/Beam.Api.csproj

@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.0-rc.1.25451.107" />
+      <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.9" />
     </ItemGroup>
 
     <ItemGroup>

Beam.Downloaders/SequentialDownloader.cs

@@ -44,8 +44,14 @@ namespace Beam.Downloaders {
             //Logger?.LogInformation("MoveNextAsync() \n\t -> Links.Current = {} ", LinksEnumerator.Current.Link.AbsoluteUri);
             links.Add(new Ordered<string>(LinksEnumerator.Current, LastOrder++));
 
-            while (LinksEnumerator.MoveNext() && !string.IsNullOrWhiteSpace(LinksEnumerator.Current) && links.Count < idealLinkCount)
+            while (links.Count < idealLinkCount && LinksEnumerator.MoveNext()) {
+                if (string.IsNullOrWhiteSpace(LinksEnumerator.Current)) {
+                    return false;
+                }
+                
                 links.Add(new Ordered<string>(LinksEnumerator.Current, LastOrder++));
+            }
+
             //Logger?.LogInformation("MoveNextAsync() \n\t -> links.Count = {} ", links.Count);
             if (links.Count == 0) {
                 Logger?.LogInformation("Out of links!");

Beam.Downloaders/UnitDownloader.cs

@@ -28,12 +28,22 @@ namespace Beam.Downloaders {
             byte[] buffer = new byte[bufferSize];
             int inBuffer = 0;
             long downloaded = 0;
+
+            long? remaining() {
+                try {
+                    return stream.Length - downloaded;
+                }
+                catch {
+                    return null;
+                }
+            }   
+            
             while ((inBuffer = stream.Read(buffer)) > 0) {
                 downloaded += inBuffer;
                 await destinationStream.WriteAsync(buffer.AsMemory(0, inBuffer), ct);
                 progress?.Report(new DownloadReport() {
                     BytesDownloaded = inBuffer,
-                    BytesRemaining = stream.Length - downloaded 
+                    BytesRemaining = remaining()
                 });
                 
                 ct.ThrowIfCancellationRequested();

Beam.Dynamic/AnchorCollectionDataProvider.cs

@@ -1,40 +0,0 @@
-using HtmlAgilityPack;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Beam.Abstractions;
-
-namespace Beam.Dynamic {
-    public class AnchorCollectionDataProvider : IDataProvider<string[]> {
-        public IBinding? Content { get; set; }
-        public string? RelativeTo { get; set; }
-
-        private string GetAbsolute(string? @base, string relative) {
-            if (@base is null)
-                return relative;
-
-            if (@base.EndsWith('/'))
-                @base = @base[..^1];
-            if (relative.StartsWith('/'))
-                relative = relative[1..];
-            return @base + '/' + relative;
-        }
-
-        public string[] Get(HtmlDocument document) {
-            if (Content is null)
-                return [];
-
-            var node = Content.Select(document);
-            if (node is null)
-                return [];
-
-            List<string> links = [];
-            foreach (var child in node.Descendants())
-                links.Add(child.GetAttributeValue("href", ""));
-
-            return links.Where(x => !string.IsNullOrWhiteSpace(x)).ToArray();
-        }
-    }
-}

Beam.Dynamic/AnchorDataProvider.cs

@@ -1,21 +0,0 @@
-using HtmlAgilityPack;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Beam.Abstractions;
-
-namespace Beam.Dynamic {
-    public class AnchorDataProvider : IDataProvider<string> {
-        public IBinding? Content { get; set; }
-
-        public string Get(HtmlDocument document) {
-            if (Content is null)
-                return "";
-
-            return Content.Select(document)?.GetAttributeValue("href", "") ?? "";
-
-        }
-    }
-}

Beam.Dynamic/ContentsArrayDataProvider.cs

@@ -1,16 +0,0 @@
-using Beam.Abstractions;
-using HtmlAgilityPack;
-
-namespace Beam.Dynamic {
-    public class ContentsArrayDataProvider : ContentsDataProvider, IDataProvider<string[]> {
-        public string[] ArrayDelimiters { get; set; } = [";"];
-
-        string[] IDataProvider<string[]>.Get(HtmlDocument document) {
-            if (Content is null)
-                return [];
-
-            return Content.Select(document)?.InnerText?.Split(ArrayDelimiters, StringSplitOptions.RemoveEmptyEntries) ?? [];
-        }
-    }
-
-}

Beam.Dynamic/ContentsDataProvider.cs

@@ -1,21 +0,0 @@
-using HtmlAgilityPack;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Beam.Abstractions;
-
-namespace Beam.Dynamic {
-    public class ContentsDataProvider : IDataProvider<string> {
-        public IBinding? Content { get; set; }
-
-        public string Get(HtmlDocument document) {
-            if (Content is null)
-                return "";
-
-            return Content.Select(document)?.InnerText ?? "";
-        }
-    }
-}

Beam.Dynamic/DataProviderJsonTypeInfoResolver.cs

@@ -28,7 +28,7 @@ public class DataProviderJsonTypeInfoResolver : DefaultJsonTypeInfoResolver {
                     new JsonDerivedType(typeof(ContentsDataProvider), "single"),
                     new JsonDerivedType(typeof(DropDownDataProvider), "dropdown"),
                     new JsonDerivedType(typeof(AnchorCollectionDataProvider), "anchor-list"),
-                    new JsonDerivedType(typeof(AnchorDataProvider), "anchor")      
+                    new JsonDerivedType(typeof(AnchorDataProvider), "anchor"),
                 }
             };
         }

Beam.Dynamic/DataProviders/ComposeDataProviders.cs

@@ -0,0 +1,83 @@
+using Beam.Abstractions;
+using HtmlAgilityPack;
+
+namespace Beam.Dynamic;
+
+/// <summary>
+/// Allows composition of different data providers to adapt to different types of data.
+/// </summary>
+/// <typeparam name="T"></typeparam>
+public class ComposeDataProviders<T> : IComposableDataProvider<T> {
+    public required IComposableDataProvider<object>[] SelectWith { get; init; }
+    public required IComposableDataProvider<T> GetWith { get; init; }
+    
+    private ComposeDataProviders() {}
+
+    public static ComposeDataProviders<T> Create(IComposableDataProvider<object> selectWith, IComposableDataProvider<T> getWith) {
+        return new ComposeDataProviders<T>() {
+            GetWith = getWith,
+            SelectWith = [selectWith]
+        };
+    }
+
+    public static ComposeDataProviders<T> Create(IComposableDataProvider<object>[] selectWiths, IComposableDataProvider<T> getWith) {
+        return new ComposeDataProviders<T>() {
+            GetWith = getWith,
+            SelectWith = selectWiths
+        };
+    }
+
+    /// <summary>
+    /// Composes the data providers, first selecting a node with <see cref="SelectWith"/>, then getting the data with <see cref="GetWith"/>.
+    /// </summary>
+    /// <exception cref="Exception">Throws when <see cref="SelectWith"/> returns a null value.</exception>
+    /// <param name="document"></param>
+    /// <returns></returns>
+    public T Get(HtmlDocument document) {
+        var selected = Select(document);
+        if (selected is null)
+            throw new Exception("Selection operation failed.");
+        return GetWith.Get(selected);
+    }
+    
+    /// <summary>
+    /// Uses the <see cref="GetWith"/> data provider to get the data from the supplied node.
+    /// </summary>
+    /// <param name="node"></param>
+    /// <returns></returns>
+    public T Get(HtmlNode node) {
+        return GetWith.Get(node);
+    }
+    
+    /// <summary>
+    /// Uses the <see cref="SelectWith"/> data provider to select a node from the supplied document.
+    /// </summary>
+    /// <param name="doc"></param>
+    /// <returns></returns>
+    public HtmlNode? Select(HtmlDocument doc) {
+        var selected = SelectWith[0].Select(doc);
+        foreach(var provider in SelectWith.Skip(1)) {
+            if (selected is null)
+                return null;
+            selected = provider.Select(selected);
+        }
+
+        return selected;
+    }
+
+    /// <summary>
+    /// Uses the <see cref="SelectWith"/> data provider to select a node from the supplied document.
+    /// </summary>
+    /// <param name="doc"></param>
+    /// <returns></returns>
+    public HtmlNode? Select(HtmlNode node) {
+        var selected = SelectWith[0].Select(node);
+        foreach(var provider in SelectWith.Skip(1)) {
+            if (selected is null)
+                return null;
+            selected = provider.Select(selected);
+        }
+
+        return selected;
+    }
+}

Beam.Dynamic/DataProviders/ManyAnchorsDataProvider.cs

@@ -0,0 +1,20 @@
+using Beam.Abstractions;
+using HtmlAgilityPack;
+
+namespace Beam.Dynamic;
+
+public class ManyAnchorsDataProvider : AnchorDataProvider, IManySelectionComposableDataProvider<string[]> {
+    public new string[] Get(HtmlDocument document) {
+        return [base.Get(document)];
+    }
+    public string[] ManyGet(HtmlNode[] node) {
+        return node.Select(x => base.Get(x)).ToArray();
+    }
+    public HtmlNode[]? SelectMany(HtmlDocument doc) {
+        var k = Select(doc);
+        return k == null ? null : [k];
+    }
+    public HtmlNode[]? SelectMany(HtmlNode[] node) {
+        return node.Select(x => Select(x) ?? null).Where(x => x is not null).Cast<HtmlNode>().ToArray();
+    }
+}

Beam.Dynamic/DataProviders/ManyComposeDataProviders.cs

@@ -0,0 +1,80 @@
+using Beam.Abstractions;
+using HtmlAgilityPack;
+
+namespace Beam.Dynamic;
+
+
+public class ManyComposeDataProviders<T> : IManySelectionComposableDataProvider<T> {
+    public required IManySelectionComposableDataProvider<object>[] SelectWith { get; init; }
+    public required IManySelectionComposableDataProvider<T> GetWith { get; init; }
+    
+    private ManyComposeDataProviders() {}
+
+    public static ManyComposeDataProviders<T> Create(IManySelectionComposableDataProvider<object> selectWith, IManySelectionComposableDataProvider<T> getWith) {
+        return new ManyComposeDataProviders<T>() {
+            GetWith = getWith,
+            SelectWith = [selectWith]
+        };
+    }
+
+    public static ManyComposeDataProviders<T> Create(IManySelectionComposableDataProvider<object>[] selectWiths, IManySelectionComposableDataProvider<T> getWith) {
+        return new ManyComposeDataProviders<T>() {
+            GetWith = getWith,
+            SelectWith = selectWiths
+        };
+    }
+
+    /// <summary>
+    /// Composes the data providers, first selecting a node with <see cref="SelectWith"/>, then getting the data with <see cref="GetWith"/>.
+    /// </summary>
+    /// <exception cref="Exception">Throws when <see cref="SelectWith"/> returns a null value.</exception>
+    /// <param name="document"></param>
+    /// <returns></returns>
+    public T Get(HtmlDocument document) {
+        var selected = SelectMany(document);
+        if (selected is null)
+            throw new Exception("Selection operation failed.");
+        return GetWith.ManyGet(selected);
+    }
+    
+    /// <summary>
+    /// Uses the <see cref="GetWith"/> data provider to get the data from the supplied node.
+    /// </summary>
+    /// <param name="node"></param>
+    /// <returns></returns>
+    public T ManyGet(HtmlNode[] node) {
+        return GetWith.ManyGet(node);
+    }
+    
+    /// <summary>
+    /// Uses the <see cref="SelectWith"/> data provider to select a node from the supplied document.
+    /// </summary>
+    /// <param name="doc"></param>
+    /// <returns></returns>
+    public HtmlNode[]? SelectMany(HtmlDocument doc) {
+        var selected = SelectWith[0].SelectMany(doc);
+        foreach(var provider in SelectWith.Skip(1)) {
+            if (selected is null)
+                return null;
+            selected = provider.SelectMany(selected);
+        }
+
+        return selected;
+    }
+
+    /// <summary>
+    /// Uses the <see cref="SelectWith"/> data provider to select a node from the supplied document.
+    /// </summary>
+    /// <param name="doc"></param>
+    /// <returns></returns>
+    public HtmlNode[]? SelectMany(HtmlNode[] node) {
+        var selected = SelectWith[0].SelectMany(node);
+        foreach(var provider in SelectWith.Skip(1)) {
+            if (selected is null)
+                return null;
+            selected = provider.SelectMany(selected);
+        }
+
+        return selected;
+    }
+}

Beam.Dynamic/DataProviders/RelationalDataProvider.cs

@@ -0,0 +1,32 @@
+using Beam.Abstractions;
+using HtmlAgilityPack;
+
+namespace Beam.Dynamic;
+
+public enum RelationType {
+    Parent,
+    Child,
+}
+
+public class RelationalDataProvider : IComposableDataProvider<HtmlNode?> {
+    
+    public RelationType RelationType { get; set; } = RelationType.Parent;
+    public IBinding? Content { get; set; }
+    
+    public HtmlNode? Get(HtmlDocument document) {
+        return Select(document);
+    }
+    public HtmlNode? Get(HtmlNode node) {
+        return Select(node);
+    }
+    public HtmlNode? Select(HtmlDocument doc) {
+        return Select(Content?.Select(doc) ?? doc.DocumentNode);
+    }
+    public HtmlNode? Select(HtmlNode node) {
+        return RelationType switch {
+            RelationType.Parent => node.ParentNode,
+            RelationType.Child => node.FirstChild,
+            _ => throw new NotSupportedException()
+        };
+    }
+}

Beam.Dynamic/DataProviders/SelectDataProvider.cs

@@ -0,0 +1,155 @@
+using System.Text.RegularExpressions;
+using Beam.Abstractions;
+using HtmlAgilityPack;
+
+namespace Beam.Dynamic;
+
+public enum SearchStrategy {
+    DepthFirst,
+    BreadthFirst,
+}
+
+public enum SearchStringDefaultSelection {
+    First,
+    Last,
+    GreatestChildren,
+    Any,
+    None,
+}
+
+public class SearchStringOptions {
+    public required bool SearchStringIsRegex { get; set; }
+    public required bool SearchInBody { get; set; }
+    public required string? SearchInAttribute { get; set; }
+    
+    /// <summary>
+    /// Only used when both <see cref="SearchInBody"/> and <see cref="SearchInAttribute"/> are false/null, or no match is found for the search criteria.
+    /// </summary>
+    public SearchStringDefaultSelection DefaultSelection { get; set; } = SearchStringDefaultSelection.First;
+    
+    /// <summary>
+    /// Only used when <see cref="SearchStringIsRegex"/> is false.
+    /// </summary>
+    public IEqualityComparer<string> UseComparer { get; set; } = StringComparer.CurrentCulture;
+}
+
+public class SelectDataProvider : IComposableDataProvider<HtmlNode?>, IManySelectionComposableDataProvider<HtmlNode?> {
+    public SearchStrategy SearchStrategyType { get; set; } = SearchStrategy.DepthFirst;
+    public SearchStringOptions SearchStringOptions { get; set; } = new SearchStringOptions() {
+        SearchStringIsRegex = false,
+        SearchInBody = true,
+        SearchInAttribute = null
+    };
+    
+    public string? SearchString { get; set; }
+    public IBinding? Content { get; set; }
+    
+    /// <summary>
+    /// Returns the first node that matches the search criteria.
+    /// </summary>
+    /// <param name="document"></param>
+    /// <returns></returns>
+    public HtmlNode? Get(HtmlDocument document) {
+        return Select(document);
+    }
+    /// <summary>
+    /// Returns the first child node that matches the search criteria.
+    /// </summary>
+    /// <param name="node"></param>
+    /// <returns></returns>
+    public HtmlNode? Get(HtmlNode node) {
+        return Select(node);
+    }
+
+    public HtmlNode? Get(HtmlNode[] node) {
+        throw new NotSupportedException();
+    }
+    
+    public HtmlNode[]? _Select(HtmlNode node) {
+        LinkedList<HtmlNode> searchSet = new();
+        LinkedListNode<HtmlNode> currentNode = searchSet.AddLast(node);
+        HashSet<HtmlNode> visited = [node];
+        
+        void breadthFirst(HtmlNode node) {
+            foreach (var child in node.ChildNodes) {
+                if (visited.Contains(child))
+                    continue;
+                searchSet.AddLast(child);
+                visited.Add(child);
+            }
+        }
+
+        void depthFirst(HtmlNode node) {
+            foreach (var child in node.ChildNodes.Reverse()) {
+                if (visited.Contains(child))
+                    continue;
+                searchSet.AddAfter(currentNode, child);
+                visited.Add(child);
+            }
+        }
+
+        Action<HtmlNode> enqueueStartegy = SearchStrategyType switch {
+            SearchStrategy.BreadthFirst => breadthFirst,
+            SearchStrategy.DepthFirst => depthFirst,
+            _ => throw new NotSupportedException()
+        };
+
+        var bestCandidate = currentNode.Value;
+        List<HtmlNode> selected = [];
+        
+        do {
+            var n = currentNode.Value;
+            if (SearchStringOptions.SearchInBody)
+                if (SearchStringOptions.SearchStringIsRegex && Regex.IsMatch(n.InnerText ?? "", SearchString ?? ""))
+                    selected.Add(n);
+                else if (SearchStringOptions.UseComparer.Equals(n.InnerText, SearchString ?? ""))
+                    selected.Add(n);
+            if (SearchStringOptions.SearchInAttribute is not null)
+                if (SearchStringOptions.SearchStringIsRegex && n.GetAttributeValue(SearchStringOptions.SearchInAttribute, null) != null &&
+                    Regex.IsMatch(n.GetAttributeValue(SearchStringOptions.SearchInAttribute, ""), SearchString ?? ""))
+                    selected.Add(n);
+                else if (SearchStringOptions.UseComparer.Equals(n.GetAttributeValue(SearchStringOptions.SearchInAttribute, null), SearchString ?? ""))
+                    selected.Add(n);
+
+            switch (SearchStringOptions.DefaultSelection) {
+                case SearchStringDefaultSelection.GreatestChildren:
+                    if (n.ChildNodes.Count > bestCandidate.ChildNodes.Count)
+                        bestCandidate = n;
+                    break;
+                case SearchStringDefaultSelection.Last:
+                    bestCandidate = n;
+                    break;
+                case SearchStringDefaultSelection.Any:
+                case SearchStringDefaultSelection.First:
+                case SearchStringDefaultSelection.None:
+                default:
+                    break;
+            }
+            enqueueStartegy(n);
+
+        } while ((currentNode = currentNode.Next!) != null);
+
+        if (selected.Count == 0 && SearchStringOptions.DefaultSelection != SearchStringDefaultSelection.None)
+            selected.Add(bestCandidate);
+        
+        return selected.ToArray();
+    }
+
+    public HtmlNode? Select(HtmlDocument document) {
+        return Select(Content?.Select(document) ?? document.DocumentNode);
+    }
+    
+    public HtmlNode? Select(HtmlNode node) {
+        return _Select(node)?.FirstOrDefault();
+    }
+
+    public HtmlNode? ManyGet(HtmlNode[] node) {
+        throw new NotSupportedException();
+    }
+    public HtmlNode[]? SelectMany(HtmlDocument doc) {
+        return _Select(Content?.Select(doc) ?? doc.DocumentNode);
+    }
+    public HtmlNode[]? SelectMany(HtmlNode[] node) {
+        return node.SelectMany(x => _Select(x) ?? []).ToArray();
+    }
+}

Beam.Dynamic/DropDownDataProvider.cs

@@ -1,53 +0,0 @@
-using HtmlAgilityPack;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Runtime.InteropServices.Marshalling;
-using System.Text;
-using System.Text.Json;
-using System.Threading.Tasks;
-using Beam.Abstractions;
-
-namespace Beam.Dynamic {
-    public class DropDownDataProvider
-            : IDataProvider<string>, 
-              IDataProvider<string[]> {
-        public IBinding? Content { get; set; }
-        public string? RelativeTo { get; set; } 
-
-        private string GetAbsolute(string? @base, string relative) {
-            if (@base is null)
-                return relative;
-
-            if (@base.EndsWith('/'))
-                @base = @base[..^1];
-            if (relative.StartsWith('/'))
-                relative = relative[1..];
-            return @base + '/' + relative;
-        }
-
-        public string[] Get(HtmlDocument document) {
-            if (Content is null)
-                return [];
-            var node = Content.Select(document);
-            if (node is null)
-                return [];
-            List<string> links = [];
-            foreach (var child in node.ChildNodes.Where(x => x.Name == "option")) {
-                var childValue = child.GetAttributeValue("value", null);
-                if (!Uri.TryCreate(GetAbsolute(RelativeTo, childValue), UriKind.Absolute, out _))
-                    continue;
-                links.Add((GetAbsolute(RelativeTo, childValue)));
-            }
-
-            return links.ToArray();
-        }
-
-
-
-        string IDataProvider<string>.Get(HtmlDocument document) {
-            return JsonSerializer.Serialize(this.Get(document));
-        }
-    }
-}

Beam.Dynamic/ListContentDataProvider.cs

@@ -1,28 +0,0 @@
-using HtmlAgilityPack;
-using System.Text;
-using Beam.Abstractions;
-
-namespace Beam.Dynamic {
-    public class ListContentDataProvider : IDataProvider<string> {
-        public IBinding? Content { get; set; }
-
-        public string Get(HtmlDocument document) {
-            if (Content is null)
-                return "";
-
-            var node = Content.Select(document);
-            if (node is null)
-                return "";
-
-            StringBuilder content = new();
-            foreach(var childNode in node.ChildNodes.SkipLast(1)) {
-                if (childNode.Name != "li")
-                    continue;
-                content.Append(childNode.InnerText.Trim() + ";");
-            }
-
-            content.Append(node.ChildNodes.Last().InnerText.Trim());
-            return content.ToString();
-        }
-    }
-}

Beam.Dynamic/ParagraphedContentDataProvider.cs

@@ -1,31 +0,0 @@
-using HtmlAgilityPack;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Beam.Abstractions;
-
-namespace Beam.Dynamic {
-    public class ParagraphedContentDataProvider : IDataProvider<string> {
-        public IBinding? Content { get; set; }
-
-        public string Get(HtmlDocument document) {
-            if (Content is null)
-                return "";
-
-            var node = Content.Select(document);
-            if (node is null)
-                return "";
-
-            StringBuilder content = new();
-            foreach(var childNode in node.ChildNodes) {
-                if (childNode.Name != "p")
-                    continue;
-                content.AppendLine(childNode.InnerText);
-            }
-
-            return content.ToString();
-        }
-    }
-}

Beam.Fluent/Core/IContextStage.cs

@@ -14,5 +14,7 @@ public interface IContextStage<RawType, OutType> {
     IContextStage<RawType, OutType> UseFragments();
     IContextStage<RawType, OutType> UsePlaywright(PlaywrightAsyncManipulator manipulator);
     IContextStage<RawType, OutType> UseStealth(StealthAsyncManipulator manipulator, StealthConfig config);
+    IContextStage<RawType, OutType> ConfigureUnitDownloaderOptions(
+        Action<UnitDownloaderOptionsBuilder<RawType, OutType>> configure);
     DownloadEnumerable<OutType> Build();
 }

Beam.Stealth/StealthConfig.cs

@@ -8,10 +8,10 @@ using OpenQA.Selenium.Edge;
 
 namespace Beam.Stealth {
     public enum Browser {
-        Firefox,
+        Firefox = 0,
-        Chrome,
+        Chrome = 1,
-        Chromium,
+        Chromium = 2,
-        Edge
+        Edge = 3
     }
 
     public sealed class StealthConfig : IDisposable {
@@ -73,22 +73,41 @@ namespace Beam.Stealth {
             bool showBrowser = false,
             string? downloadDir = null,
             TimeSpan? timeOut = null,
-            Browser browser = Browser.Firefox,
+            Browser preferredBrowser = Browser.Firefox,
             ILogger? logger = null) {
             // pick or create a dedicated download folder
             downloadDir ??= Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
             Directory.CreateDirectory(downloadDir);
 
             bool headless = !showBrowser;
+            IWebDriver? driver = null;
+            List<Exception>? errors = [];
 
-            IWebDriver driver = browser switch {
+            while (preferredBrowser <= Browser.Edge) {
-                Browser.Chrome or Browser.Chromium
+                try {
-                    => new ChromeDriver(GetChromeOptions(downloadDir, headless)),
+                    driver = preferredBrowser switch {
-                Browser.Edge
+                        Browser.Chrome or Browser.Chromium
-                    => new EdgeDriver(GetEdgeOptions(downloadDir, headless)),
+                            => new ChromeDriver(GetChromeOptions(downloadDir, headless)),
-                Browser.Firefox or _
+                        Browser.Edge
-                    => new FirefoxDriver(GetFirefoxOptions(downloadDir, headless)),
+                            => new EdgeDriver(GetEdgeOptions(downloadDir, headless)),
-            };
+                        Browser.Firefox or _
+                            => new FirefoxDriver(GetFirefoxOptions(downloadDir, headless)),
+                    };
+                }
+                catch (Exception e) {
+                    if (preferredBrowser != Browser.Edge)
+                        logger?.LogWarning(e, "Failed to create driver for browser {Browser}, falling back to {Fallback}", preferredBrowser, Enum.GetName(preferredBrowser + 1));
+                    else {
+                        logger?.LogCritical(e, "Failed to create driver for browser {Browser}, no more fallback remaining!", preferredBrowser);
+                    }
+                    
+                    preferredBrowser++;
+                    errors.Add(e);
+                }
+            }
+
+            if (driver is null)
+                throw new AggregateException(errors);
             
             return new StealthConfig(downloadDir) {
                 ShowBrowser = showBrowser,

aeqw89.Beam/aeqw89.Beam.csproj

@@ -7,20 +7,29 @@
         <Title>Beam</Title>
         <Authors>aeqw89</Authors>
         <Company>qwsdcvghyu</Company>
-        <Version>2.2.0</Version>
+        <Version>2.4.5</Version>
         <Description>A library for downloading internet resources</Description>
         <PackageProjectUrl>https://github.com/qwsdcvghyu89/Beam</PackageProjectUrl>
         <RepositoryUrl>https://github.com/qwsdcvghyu89/Beam</RepositoryUrl>
         <PackageId>aeqw89.Beam</PackageId>
-        <PackageVersion>2.2.0</PackageVersion>
+        <PackageVersion>2.4.5</PackageVersion>
     </PropertyGroup>
     <ItemGroup>
+        <ProjectReference Include="..\Beam.Api\Beam.Api.csproj">
+            <PrivateAssets>all</PrivateAssets>
+        </ProjectReference>
+        <ProjectReference Include="..\Beam.Data\Beam.Data.csproj">
+            <PrivateAssets>all</PrivateAssets>
+        </ProjectReference>
         <ProjectReference Include="..\Beam.Dynamic\Beam.Dynamic.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
         <ProjectReference Include="..\Beam.Exports\Beam.Exports.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
+        <ProjectReference Include="..\Beam.Fluent\Beam.Fluent.csproj">
+            <PrivateAssets>all</PrivateAssets>
+        </ProjectReference>
         <ProjectReference Include="..\Beam.Playwright\Beam.Playwright.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
@@ -33,6 +42,9 @@
         <ProjectReference Include="..\Beam\Beam.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.9">
+            <Transitive>true</Transitive>
+        </PackageReference>
         <PackageReference Include="aeqw89.DataKeys" Version="2.1.1">
             <Transitive>true</Transitive>
         </PackageReference>
@@ -45,10 +57,13 @@
         <PackageReference Include="Microsoft.Recognizers.Text.Number" Version="1.8.13">
             <Transitive>true</Transitive>
         </PackageReference>
-        <PackageReference Include="Microsoft.Playwright" Version="1.52.0">
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.9">
             <Transitive>true</Transitive>
         </PackageReference>
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.9">
+        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.9">
+            <Transitive>true</Transitive>
+        </PackageReference>
+        <PackageReference Include="Microsoft.Playwright" Version="1.52.0">
             <Transitive>true</Transitive>
         </PackageReference>
         <PackageReference Include="Selenium.WebDriver" Version="4.34.0">

aeqw89.Beam/aeqw89.Beam.csproj.bak

@@ -7,20 +7,29 @@
         <Title>Beam</Title>
         <Authors>aeqw89</Authors>
         <Company>qwsdcvghyu</Company>
-        <Version>2.1.6</Version>
+        <Version>2.4.4</Version>
         <Description>A library for downloading internet resources</Description>
         <PackageProjectUrl>https://github.com/qwsdcvghyu89/Beam</PackageProjectUrl>
         <RepositoryUrl>https://github.com/qwsdcvghyu89/Beam</RepositoryUrl>
         <PackageId>aeqw89.Beam</PackageId>
-        <PackageVersion>2.1.6</PackageVersion>
+        <PackageVersion>2.4.4</PackageVersion>
     </PropertyGroup>
     <ItemGroup>
+        <ProjectReference Include="..\Beam.Api\Beam.Api.csproj">
+            <PrivateAssets>all</PrivateAssets>
+        </ProjectReference>
+        <ProjectReference Include="..\Beam.Data\Beam.Data.csproj">
+            <PrivateAssets>all</PrivateAssets>
+        </ProjectReference>
         <ProjectReference Include="..\Beam.Dynamic\Beam.Dynamic.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
         <ProjectReference Include="..\Beam.Exports\Beam.Exports.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
+        <ProjectReference Include="..\Beam.Fluent\Beam.Fluent.csproj">
+            <PrivateAssets>all</PrivateAssets>
+        </ProjectReference>
         <ProjectReference Include="..\Beam.Playwright\Beam.Playwright.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
@@ -33,6 +42,9 @@
         <ProjectReference Include="..\Beam\Beam.csproj">
             <PrivateAssets>all</PrivateAssets>
         </ProjectReference>
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.9">
+            <Transitive>true</Transitive>
+        </PackageReference>
         <PackageReference Include="aeqw89.DataKeys" Version="2.1.1">
             <Transitive>true</Transitive>
         </PackageReference>
@@ -45,16 +57,19 @@
         <PackageReference Include="Microsoft.Recognizers.Text.Number" Version="1.8.13">
             <Transitive>true</Transitive>
         </PackageReference>
-        <PackageReference Include="Microsoft.Playwright" Version="1.52.0">
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.9">
             <Transitive>true</Transitive>
         </PackageReference>
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.9">
+        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.9">
+            <Transitive>true</Transitive>
+        </PackageReference>
+        <PackageReference Include="Microsoft.Playwright" Version="1.52.0">
             <Transitive>true</Transitive>
         </PackageReference>
         <PackageReference Include="Selenium.WebDriver" Version="4.34.0">
             <Transitive>true</Transitive>
         </PackageReference>
-        <PackageReference Include="System.Linq.Async" Version="6.0.1">
+        <PackageReference Include="System.Linq.Async" Version="6.0.3">
             <Transitive>true</Transitive>
         </PackageReference>
         <PackageReference Include="EntityFramework" Version="6.5.1">