DEV Community: Muhammad Mustafa

Build an Online PDF Viewer Using C# .NET | Convert PDF to HTML for Web Viewing

Muhammad Mustafa — Fri, 26 Jun 2026 08:31:31 +0000

Stop wrestling with clunky iframe embeds that freeze your PDFs on every device. This guide walks you through building a sleek, browser‑native PDF viewer by converting each page to HTML with a .NET REST API. You’ll see how to call the conversion endpoint from C#, handle the response, and render the resulting HTML with a lightweight JavaScript UI that adapts to any screen size.

The article also shows a quick cURL example for testing, tips for caching converted pages, and best‑practice styling tricks to give you full control over navigation, zoom, and search. By the end, you’ll have a reusable component you can drop into any ASP.NET Core or MVC project, turning static PDFs into interactive, mobile‑friendly experiences.

Read the full guide → https://blog.aspose.cloud/pdf/convert-online-pdf-viewer-using-csharp/

Summarize Document Content in C# .NET | Document Summarization API

Muhammad Mustafa — Thu, 25 Jun 2026 08:18:34 +0000

Tired of wading through endless PDFs and Word reports just to find the key takeaways?

Businesses drown in unstructured text, and pulling out the highlights manually eats up time and resources. An AI‑powered summarization service can condense pages of content into a concise paragraph in seconds.

In this guide I walk you through the complete C# .NET workflow with the GroupDocs Cloud SDK: generate an access token, upload a document, call the summarization endpoint, and persist the result. Sample code and a cURL example keep you moving fast.

By the end you’ll know how to integrate summarization into any .NET app, handle PDF, Word, or HTML inputs, and test the API without writing a single line of infrastructure code.

Read the full guide → https://blog.groupdocs.cloud/rewriter/summarize-document-content-csharp/

Parse Documents with AI Agents Using the Open-Source GroupDocs.Parser Cloud MCP Server

Muhammad Mustafa — Wed, 24 Jun 2026 10:29:49 +0000

Tired of wiring custom code for every document format your AI agents need to read? The open‑source GroupDocs Parser Cloud MCP Server gives you a ready‑made, MCP‑compliant endpoint that turns PDFs, Word files, images and barcodes into structured data with a single call.

In this guide we walk through cloning the repo, setting up environment variables, and launching the server on Linux, macOS or Windows. You’ll see how to call the MCP endpoint from KiloCode, Cursor or VS Code, and explore advanced options like virtual‑environment reinitialization and the built‑in MCP Inspector.

By the end you’ll understand the Model Context Protocol basics, know when to prefer this wrapper over raw API calls, and have a working server you can integrate into any AI workflow.

Read the full guide → https://blog.groupdocs.cloud/parser/groupdocs-parser-mcp-server-for-ai-agents/

Convert EPUB to Word Documents in C# .NET – EPUB to DOCX via REST API

Muhammad Mustafa — Wed, 24 Jun 2026 10:23:59 +0000

Converting EPUB files to editable Word documents is a common need when teams want to repurpose e‑book content for collaboration, review, or further publishing. While desktop tools can handle the conversion, a cloud‑based REST API lets you perform the transformation directly from a C# .NET application without installing any heavyweight software. In this article you’ll learn how to call a REST endpoint to turn an EPUB into a DOCX file, handle authentication, and stream the result back to your application.

Setting Up the HTTP Client and Authentication

The first step is to obtain an OAuth 2.0 access token from the cloud service. The token is required for every request and typically has a short lifespan, so you’ll want to request it at application startup or just before the conversion call.

using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;

public async Task<string> GetAccessTokenAsync(string clientId, string clientSecret)
{
    using var client = new HttpClient();
    var request = new HttpRequestMessage(HttpMethod.Post,
        "https://api.example.com/oauth2/token");

    var content = new FormUrlEncodedContent(new[]
    {
        new KeyValuePair<string, string>("grant_type", "client_credentials"),
        new KeyValuePair<string, string>("client_id", clientId),
        new KeyValuePair<string, string>("client_secret", clientSecret)
    });
    request.Content = content;

    var response = await client.SendAsync(request);
    response.EnsureSuccessStatusCode();

    var json = JObject.Parse(await response.Content.ReadAsStringAsync());
    return json["access_token"]!.ToString();
}

Store the token securely and reuse it for subsequent calls. The Authorization header must be set to Bearer <token> for every request you make to the conversion endpoint.

Uploading the EPUB File

Once you have a valid token, the next step is to upload the EPUB file. The API typically expects a multipart/form‑data request where the file is sent under a specific field name (e.g., file).

public async Task<string> UploadEpubAsync(string token, string epubPath)
{
    using var client = new HttpClient();
    client.DefaultRequestHeaders.Authorization =
        new AuthenticationHeaderValue("Bearer", token);

    using var multipart = new MultipartFormDataContent();
    var fileContent = new ByteArrayContent(await File.ReadAllBytesAsync(epubPath));
    fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/epub+zip");
    multipart.Add(fileContent, "file", Path.GetFileName(epubPath));

    var response = await client.PostAsync("https://api.example.com/v1/convert/epub-to-docx", multipart);
    response.EnsureSuccessStatusCode();

    // The API returns a job ID that you can poll for completion.
    var json = JObject.Parse(await response.Content.ReadAsStringAsync());
    return json["jobId"]!.ToString();
}

The service processes the conversion asynchronously, so you receive a job identifier that you’ll query later to retrieve the finished DOCX file.

Polling for Conversion Completion and Downloading the Result

Conversion can take a few seconds depending on the source file size. Implement a simple polling loop that checks the job status until it reports completed.

public async Task<byte[]> DownloadResultAsync(string token, string jobId)
{
    using var client = new HttpClient();
    client.DefaultRequestHeaders.Authorization =
        new AuthenticationHeaderValue("Bearer", token);

    while (true)
    {
        var statusResp = await client.GetAsync($"https://api.example.com/v1/jobs/{jobId}");
        statusResp.EnsureSuccessStatusCode();

        var statusJson = JObject.Parse(await statusResp.Content.ReadAsStringAsync());
        var status = statusJson["status"]!.ToString();

        if (status == "completed")
        {
            var downloadUrl = statusJson["resultUrl"]!.ToString();
            var fileBytes = await client.GetByteArrayAsync(downloadUrl);
            return fileBytes;
        }
        else if (status == "failed")
        {
            throw new Exception("Conversion failed.");
        }

        // Wait a short interval before the next poll.
        await Task.Delay(2000);
    }
}

When the job finishes, the API provides a direct URL to the generated DOCX file. You can then save the byte array to disk or stream it directly to another service.

var docxBytes = await DownloadResultAsync(accessToken, jobId);
await File.WriteAllBytesAsync("output.docx", docxBytes);
Console.WriteLine("EPUB successfully converted to DOCX.");

Benefits of Using a Cloud‑Based REST Approach

High accuracy – The service parses the EPUB structure and maps headings, paragraphs, and tables to Word equivalents, preserving the original layout.
No local dependencies – Because the conversion runs in the cloud, you don’t need Microsoft Word installed on the server, making the solution portable across Linux, Windows, or container environments.
Scalable – The REST endpoint can handle many concurrent requests, allowing you to batch‑process large libraries of e‑books.
Secure – OAuth 2.0 authentication and HTTPS transport keep your documents safe during upload and download.

Wrapping It All Up

By following the steps above—authenticating, uploading the EPUB, polling for completion, and downloading the DOCX—you can integrate EPUB‑to‑Word conversion into any C# .NET application with just a few lines of code. This approach eliminates the need for manual desktop tools, streamlines collaborative workflows, and leverages cloud scalability. Give it a try in your next document‑processing pipeline and see how much time you save!

SVG to JPG Conversion Without External Tools in PHP

Muhammad Mustafa — Wed, 24 Jun 2026 08:22:44 +0000

Converting SVG graphics to JPG is a common need when you want raster thumbnails, email‑ready images, or compatibility with older browsers. Traditionally this task required native binaries like ImageMagick or librsvg, which adds deployment complexity. With a pure‑PHP cloud conversion SDK you can offload the heavy lifting to a managed service, keeping your server lightweight and your codebase simple. The following guide shows how to perform an end‑to‑end SVG‑to‑JPG conversion in PHP without installing any external tools.

Setting Up the PHP Client

First, add the SDK to your project via Composer. The package name is generic, so replace it with the actual one you use.

composer require groupdocs/conversion-php

Create a client instance using the credentials you obtained from the cloud console. Store the API key and client ID in environment variables to avoid hard‑coding secrets.

<?php
require 'vendor/autoload.php';

use GroupDocs\Conversion\Api\ConversionApi;
use GroupDocs\Conversion\Configuration;

// Load credentials from .env or server config
$clientId = getenv('GROUPDOCS_CLIENT_ID');
$clientSecret = getenv('GROUPDOCS_CLIENT_SECRET');

$config = new Configuration([
    'client_id' => $clientId,
    'client_secret' => $clientSecret,
    // Optional: set a custom base URL if you use a private cloud
    // 'base_url' => 'https://api.yourcloud.com'
]);

$conversionApi = new ConversionApi($config);
?>

The client communicates with the cloud service over HTTPS, so no additional binaries are required on the host machine.

Uploading and Configuring the Conversion

The SDK accepts three input forms: a local file path, a PHP stream, or raw SVG markup. Below we demonstrate uploading a local SVG file and preparing conversion options.

<?php
$svgPath = __DIR__ . '/assets/logo.svg';

// Upload the file to the cloud storage associated with the account
$uploadResult = $conversionApi->uploadFile($svgPath);
$remoteFileId = $uploadResult->getFileId(); // Identifier used for later calls

// Define conversion options – target format, dimensions, DPI, etc.
$options = [
    'output_format' => 'jpg',
    // Set a width while preserving aspect ratio, or specify both width & height
    'width' => 800,
    // DPI influences quality; 72 is screen‑friendly, 300+ for print
    'dpi' => 150,
    // Optional: background color for transparent SVGs
    'background_color' => '#FFFFFF'
];
?>

The uploadFile method streams the SVG to the cloud, avoiding memory spikes even for large assets. Conversion options are passed as a simple associative array, making the API intuitive.

Performing the Conversion and Retrieving the JPG

With the file uploaded and options defined, trigger the conversion. The service returns a job identifier that you can poll or wait for synchronously, depending on the expected workload.

<?php
// Start the conversion job
$job = $conversionApi->convertFile($remoteFileId, $options);

// Simple synchronous wait – suitable for small files
while (!$job->isCompleted()) {
    sleep(1); // poll every second
    $job = $conversionApi->getJobStatus($job->getId());
}

// Once completed, download the resulting JPG
$jpgStream = $conversionApi->downloadResult($job->getResultFileId());

// Save to local filesystem or stream directly to the browser
$localJpgPath = __DIR__ . '/output/logo.jpg';
file_put_contents($localJpgPath, $jpgStream);
echo "Conversion finished: {$localJpgPath}\n";
?>

The SDK handles temporary storage, format conversion, and transcoding on the server side. You only receive the final binary stream, which you can store, cache, or serve immediately.

Performance Tips and Best Practices

Batch Uploads – If you need to convert many SVGs, upload them in parallel using asynchronous HTTP requests. The cloud service can process multiple jobs concurrently, reducing overall latency.
Cache Results – Store the generated JPGs with a hash of the original SVG and conversion parameters. Subsequent requests can skip the conversion step entirely.
Limit Resolution – Converting at extremely high DPI can inflate costs and bandwidth. Choose the smallest resolution that satisfies your use case.
Error Handling – Always inspect the job status for failure codes (e.g., unsupported SVG features). The SDK throws descriptive exceptions you can catch to fallback to a different strategy.

try {
    // conversion code …
} catch (Exception $e) {
    error_log('SVG conversion failed: ' . $e->getMessage());
    // fallback logic here
}

Summary

By leveraging a cloud‑based PHP conversion SDK, you eliminate the need for native image libraries, keep your deployment footprint small, and gain access to scalable processing power. The workflow—client initialization, file upload, option configuration, conversion execution, and result retrieval—fits neatly into any modern PHP application, from Laravel APIs to simple procedural scripts. Give it a try in your next project, and let the cloud handle the heavy lifting while you focus on delivering great user experiences. Happy coding!