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Generates a captcha image for a Blazor Server application

Generates a captcha image for a Blazor Server application.
Information
Category: .NET / Authentication and Authorization
Watchers: 1
Star: 5
Fork: 1
Last update: Jun 11, 2020
Resource links
https://github.com/tossnet/Blazor-Captcha

Blazor-Captcha

NuGet Generates a captcha image for a Blazor Server application.

Blazor Captcha

Installation

Latest version in here: NuGet

To Install

Install-Package BlazorCaptcha

or

dotnet add package BlazorCaptcha

For client-side and server-side Blazor - add script section to _Host.cshtml (head section)

<link href="_content/BlazorCaptcha/captcha.css" rel="stylesheet" />

Usage

@page "/"
@using BlazorCaptcha

<h3>Hello, world!</h3>


<Captcha CaptchaWord="@Captcha" OnRefresh="NewCaptchaEvent" />

<p>@Captcha</p>

@code{
    private string Captcha = "";

    private void NewCaptchaEvent()
    {
        Captcha = BlazorCaptcha.Tools.GetCaptchaWord(5);
    }


    protected override Task OnInitializedAsync()
    {
        NewCaptchaEvent();

        return base.OnInitializedAsync();
    }
}
0 Open More issues
Closed

Potential issue with LINUX deployment

I implemented this library in my Blazor Server application and it worked perfectly in development on my Windows machine. But after deployment to my LINUX server the following exception is thrown:

System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies.

I checked the dependancies and I saw that there was a requirement for SkiaSharp.NativeAssets which has separate versions for Windows and macOS:

image

I checked on Nuget and there is actually a LINUX version of SkiaSharp.NativeAssets as well, but it's not included with the Blazor-Captcha package.

So I'm guessing that this explains my deployment problem on LINUX.

opened Mar 9, 2022 by bjh0 7
Closed

Make refresh button a normal button

If the current refresh button is used inside a form, it will submit the form, which is not ideal...

opened Dec 6, 2021 by TheGuardianWolf 3
Closed

Blazor web assembly captcha

hello dear, how can i run captcha in Blazor web assembly? please help me

thanks

opened Jun 13, 2021 by PersianCoders 2
Closed

Dependent on BootStrap?

It seems like this component is dependent ("btn") on BootStrap?

builder.AddAttribute(++seq, "class", "btn btn-refresh");

In other words, it looks like your refresh button needs BootStrap. Was this your intent?

Nevertheless, this is still a pretty decent component. I just wish it wasn't dependent on System.Drawing either.

:<)

opened Sep 23, 2021 by moehoward 1
Closed

Issue when trying to ran sample

I am getting following error when traying to run sample:

An unhandled exception occurred while processing the request.

DllNotFoundException: Unable to load shared library 'libgdiplus' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(liblibgdiplus, 1): image not found System.Drawing.SafeNativeMethods+Gdip.GdiplusStartup(out IntPtr token, ref StartupInput input, out StartupOutput output)

TypeInitializationException: The type initializer for 'Gdip' threw an exception. System.Drawing.SafeNativeMethods+Gdip.GdipCreateBitmapFromScan0(int width, int height, int stride, int format, HandleRef scan0, out IntPtr bitmap)

DllNotFoundException: Unable to load shared library 'libgdiplus' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(liblibgdiplus, 1): image not found System.Drawing.SafeNativeMethods+Gdip.GdiplusStartup(out IntPtr token, ref StartupInput input, out StartupOutput output) System.Drawing.SafeNativeMethods+Gdip..cctor()

TypeInitializationException: The type initializer for 'Gdip' threw an exception. System.Drawing.SafeNativeMethods+Gdip.GdipCreateBitmapFromScan0(int width, int height, int stride, int format, HandleRef scan0, out IntPtr bitmap) System.Drawing.Bitmap..ctor(int width, int height, PixelFormat format) System.Drawing.Bitmap..ctor(int width, int height) BlazorCaptcha.Captcha.BuildRenderTree(RenderTreeBuilder builder) Microsoft.AspNetCore.Components.ComponentBase.<.ctor>b__6_0(RenderTreeBuilder builder) Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment) Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry) Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue() Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.HandleException(Exception exception) Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue() Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessPendingRender() Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(int componentId, RenderFragment renderFragment) Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged() Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync() Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync() Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.HandleException(Exception exception) Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToPendingTasks(Task task) Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters) Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(int componentId, ParameterView initialParameters) Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.CreateInitialRenderAsync(Type componentType, ParameterView initialParameters) Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.RenderComponentAsync(Type componentType, ParameterView initialParameters) Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext+<>c__11+<b__11_0>d.MoveNext() Microsoft.AspNetCore.Mvc.ViewFeatures.StaticComponentRenderer.PrerenderComponentAsync(ParameterView parameters, HttpContext httpContext, Type componentType) Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.PrerenderedServerComponentAsync(HttpContext context, ServerComponentInvocationSequence invocationId, Type type, ParameterView parametersCollection) Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.RenderComponentAsync(ViewContext viewContext, Type componentType, RenderMode renderMode, object parameters) Microsoft.AspNetCore.Mvc.TagHelpers.ComponentTagHelper.ProcessAsync(TagHelperContext context, TagHelperOutput output) Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner.g__Awaited|0_0(Task task, TagHelperExecutionContext executionContext, int i, int count) BlazorCaptchaTest.Pages.Pages__Host.b__14_1() in _Host.cshtml + Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.SetOutputContentAsync() BlazorCaptchaTest.Pages.Pages__Host.ExecuteAsync() in _Host.cshtml + Layout = null; Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context) Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, bool invokeViewStarts) Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context) Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, string contentType, Nullable statusCode) Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, string contentType, Nullable statusCode) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|29_0<TFilter, TFilterAsync>(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext<TFilter, TFilterAsync>(ref State next, ref Scope scope, ref object state, ref bool isCompleted) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters() Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted) Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync() Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger) Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

opened Jul 12, 2020 by dinonovak 1
Closed

Create LICENSE

null

opened Apr 5, 2022 by tossnet 0
Open

The refresh button is almost nonexistent when hosted on Azure

Is there a setting to control the refresh button?

image

opened May 9, 2022 by alexandergroup-sciszewski 1

Contents

    lepture A captcha library that generates audio and image CAPTCHAs.
    go-macaron Package captcha is a middleware that provides captcha service for Macaron.
    AUTOMATIC1111 4chan captcha solver userscript
    mbi Django Simple Captcha is an extremely simple, yet highly customizable Django application to add captcha images to any Django form.
    nladuo captcha break based on opencv2, tesseract-ocr and some machine learning algorithm.
    dotnet-presentations Blazor workshop
    trekjs A Lightweight Pure JavaScript Captcha for Node.js. No C/C++, No ImageMagick, No Canvas.
    oqtane Modular Application Framework for Blazor
    oqtane Modular Application Framework for Blazor
    damienbod Blazor.BFF.AzureAD.Template, Blazor WASM hosted in ASP.NET Core using Azure AD BFF (server authentication)
    torhovland Connecting a Redux state store with Blazor.
    tesar-tech Tips and notes about Blazor and Tailwind
    KristofferStrube A fullscreen Bubble animation made in Blazor Wasm
    SteveSandersonMS A sample Blazor WebAssembly application that includes authentication, in-browser data storage, offline support, localization, responsive layouts, and more
    0b01 Solve captcha without manually labeling a training set
    AbirHasan2005 A Telegram Bot for verifying new group members by Emojis Captcha by @AbirHasan2005.
    JensBorrisholt Delphi version of Captcha Verification
    berkaltiok Discord Guilds New Member Captcha (Verification) System
    GNUWeeb Fancy, fully-featured, easy to use Telegram CAPTCHA bot written in Go
    dotnet Blazor is a .NET web framework using C#/Razor and HTML that runs in the browser with WebAssembly.
    CloudNimble A library to help Blazor and Electron.NET work better together. (Archived)
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