Add HTTP Headers to HTML Page Request

EVO PDF Client for .NET Core

EVO HTML to PDF Converter allows you to add HTTP headers when you request the HTML page. There are various standard HTTP headers offering important information to web server about the capabilities of the browser like the accepted content type, accepted encoding, accepted language, connection mode, user agent.

The HTTP headers to be used when the HTML page to convert is requested can be added to HtmlToPdfConverterHttpRequestHeaders collection.

Code Sample - Add HTTP Headers to HTML Page Request

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Http;

// Use EVO PDF Namespace
using EvoPdfClient;

namespace EvoHtmlToPdfDemo.Controllers.HTML_to_PDF.HTTP_Headers_and_Cookies
{
    public class Add_HTTP_Headers_to_RequestController : Controller
    {
        [HttpPost]
        public ActionResult ConvertHtmlToPdf(IFormCollection collection)
        {
            // Get the server options
            string serverIP = collection["textBoxServerIP"];
            uint serverPort = uint.Parse(collection["textBoxServerPort"]);
            string servicePassword = collection["textBoxServicePassword"];
            bool useServicePassword = servicePassword.Length > 0;
            bool useTcpService = collection["ServerType"] == "radioButtonUseTcpService";
            string webServiceUrl = collection["textBoxWebServiceUrl"];

            // Create the HTML to PDF converter object
            HtmlToPdfConverter htmlToPdfConverter = null;
            if (useTcpService)
                htmlToPdfConverter = new HtmlToPdfConverter(serverIP, serverPort);
            else
                htmlToPdfConverter = new HtmlToPdfConverter(true, webServiceUrl);

            // Set optional service password
            if (useServicePassword)
                htmlToPdfConverter.ServicePassword = servicePassword;

            // Set license key received after purchase to use the converter in licensed mode
            // Leave it not set to use the converter in demo mode
            htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

            // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
            // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
            htmlToPdfConverter.ConversionDelay = 2;

            // Add custom HTTP headers

            if (collection["header1NameTextBox"][0].Length > 0 && collection["header1ValueTextBox"][0].Length > 0)
                htmlToPdfConverter.HttpRequestHeaders.Add(collection["header1NameTextBox"], collection["header1ValueTextBox"]);

            if (collection["header2NameTextBox"][0].Length > 0 && collection["header2ValueTextBox"][0].Length > 0)
                htmlToPdfConverter.HttpRequestHeaders.Add(collection["header2NameTextBox"], collection["header2ValueTextBox"]);

            if (collection["header3NameTextBox"][0].Length > 0 && collection["header3ValueTextBox"][0].Length > 0)
                htmlToPdfConverter.HttpRequestHeaders.Add(collection["header3NameTextBox"], collection["header3ValueTextBox"]);

            if (collection["header4NameTextBox"][0].Length > 0 && collection["header4ValueTextBox"][0].Length > 0)
                htmlToPdfConverter.HttpRequestHeaders.Add(collection["header4NameTextBox"], collection["header4ValueTextBox"]);

            if (collection["header5NameTextBox"][0].Length > 0 && collection["header5ValueTextBox"][0].Length > 0)
                htmlToPdfConverter.HttpRequestHeaders.Add(collection["header5NameTextBox"], collection["header5ValueTextBox"]);

            // Convert the HTML page to a PDF document in a memory buffer
            byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(collection["urlTextBox"]);

            // Send the PDF file to browser
            FileResult fileResult = new FileContentResult(outPdfBuffer, "application/pdf");
            fileResult.FileDownloadName = "HTTP_Headers.pdf";

            return fileResult;
        }
    }
}