ASP.Net WebService Base64인코딩

ASP.Net 에서의 웹서비스 get / post에 대한 예제

using System;
using System.Diagnostics;
using System.Web;

public class ProcessHandler : IHttpHandler {
    public void ProcessRequest (HttpContext context) {
        // Get the method used to call the page (GET or POST)
        string method = context.Request.HttpMethod;

        if (method == "GET") {
            // Get the parameters from the query string
            string param = context.Request.QueryString["param"];

            // Execute the Notepad.exe process with the parameter
            ProcessStartInfo startInfo = new ProcessStartInfo("notepad.exe", param);
            Process.Start(startInfo);

            // Send a response back to the client
            context.Response.ContentType = "text/plain";
            context.Response.Write("Notepad.exe process started with parameter: " + param);
        } else if (method == "POST") {
            // Get the parameters from the request body
            string param = context.Request.Form["param"];

            // Execute the Notepad.exe process with the parameter
            ProcessStartInfo startInfo = new ProcessStartInfo("notepad.exe", param);
            Process.Start(startInfo);

            // Send a response back to the client
            context.Response.ContentType = "text/plain";
            context.Response.Write("Notepad.exe process started with parameter: " + param);
        } else {
            // Invalid request method
            context.Response.StatusCode = 405;
            context.Response.Write("Invalid request method.");
        }
    }

    public bool IsReusable {
        get {
            return false;
        }
    }
}

Http Get method의 파라미터로 받은 url에서 파일을 받는다
받은 파일은 base64로 인코딩 된 파일이고 이를
byte로 디코딩하여 다운로드 한다.

using System;
using System.Net;
using System.IO;
using System.Web;

class Program {
    static void Main(string[] args) {
        string urlParam = "url"; // The name of the URL parameter in the query string
        string base64Data = ""; // The variable to store the base64 encoded file data

        try {
            // Get the URL parameter from the query string
            string url = HttpUtility.UrlDecode(HttpContext.Current.Request.QueryString[urlParam]);

            // Create a WebClient object to make the GET request
            using (WebClient client = new WebClient()) {
                // Make the GET request and get the response data as a byte array
                byte[] fileData = client.DownloadData(url);

                // Convert the byte array to a base64 string
                base64Data = Convert.ToBase64String(fileData);
            }

            // Decode the base64 string to a byte array
            byte[] decodedData = Convert.FromBase64String(base64Data);

            // Save the decoded data to a file
            using (FileStream stream = new FileStream("file.pdf", FileMode.CreateNew)) {
                stream.Write(decodedData, 0, decodedData.Length);
            }

            Console.WriteLine("File downloaded successfully.");
        } catch (WebException ex) {
            Console.WriteLine("Error downloading file: " + ex.Message);
        } catch (Exception ex) {
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}