C#

Sample code to take website screenshots in C#

Check out our nuget package here

using UrlboxMain;
namespace Screenshot
{
public class Screenshotter
{
Urlbox urlbox = new Urlbox("YOUR_URLBOX_API_KEY", "YOUR_URLBOX_API_SECRET");
public void GetScreenshotUrl()
{
dynamic options = new ExpandoObject();
options.Width = 1280;
options.Thumb_Width = 500;
options.Full_Page = true;
var output = urlbox.GenerateUrl("bbc.co.uk", options);
// output is now https://api.urlbox.io/v1/YOUR_URLBOX_API_KEY/d6b5068716c19ba4556648ad9df047d5847cda0c/png?url=bbc.co.uk&width=1280&thumb_width=500&full_page=true
// to generate a screenshot image you would make a simple GET request to this URL, for example putting it inside an <img> tag.
}
}
}
// ================================================================
// UrlboxMain project/package:
using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Linq;
using System.Text;
using PCLCrypto;
namespace UrlboxMain
{
public class Urlbox
{
String apiKey;
String apiSecret;
static List<String> encodedPropertyNames = new List<String> { "user_agent", "bg_color", "hide_selector", "click_selector", "highlight", "highlightbg", "highlightfg" };
static List<String> booleanPropertyNames = new List<String> { "force", "retina", "full_page", "disable_js" };
public Urlbox(String apiKey, String apiSecret)
{
if (String.IsNullOrEmpty(apiKey) || String.IsNullOrEmpty(apiSecret))
{
throw new ArgumentException("Please provide your Urlbox.io API Key and API Secret");
}
this.apiKey = apiKey;
this.apiSecret = apiSecret;
}
public string GenerateUrl(string url)
{
return this.GenerateUrl(url, new ExpandoObject());
}
public string GenerateUrl(string url, ExpandoObject options)
{
if (String.IsNullOrEmpty(url))
{
throw new ArgumentException("Please provide a url in order to generate a screenshot URL");
}
var encodedUrl = urlEncode(url);
var format = "png";
byte[] key = Encoding.UTF8.GetBytes(this.apiSecret);
var urlString = string.Format("url={0}", encodedUrl);
StringBuilder sb = new StringBuilder(urlString);
foreach (KeyValuePair<string, object> kvp in options)
{
var optionName = kvp.Key.ToLower();
var optionValue = kvp.Value.ToString();
if (String.IsNullOrEmpty(optionValue))
{
continue;
}
if (string.Equals(optionName, "format")){
format = optionValue;
continue;
}
if (encodedPropertyNames.Contains(optionName))
{
optionValue = urlEncode(optionValue);
}
if (booleanPropertyNames.Contains(optionName))
{
if (!(bool)kvp.Value) { continue; }
optionValue = optionValue.ToLower();
}
sb.Append(string.Format("&{0}={1}", optionName, optionValue));
}
var queryString = sb.ToString();
var uniqueToken = generateToken(queryString, key);
return string.Format("https://api.urlbox.io/v1/{0}/{1}/{2}?{3}", this.apiKey, uniqueToken, format, queryString);
}
private static string generateToken(String data, byte[] key)
{
var algorithm = WinRTCrypto.MacAlgorithmProvider.OpenAlgorithm(MacAlgorithm.HmacSha1);
CryptographicHash hasher = algorithm.CreateHash(key);
hasher.Append(Encoding.UTF8.GetBytes(data));
byte[] mac = hasher.GetValueAndReset();
var macStr = byteArrayToString(mac);
return macStr;
}
private static string byteArrayToString(byte[] ba)
{
string hex = BitConverter.ToString(ba).ToLower();
return hex.Replace("-", "");
}
private static string urlEncode(string url)
{
// make it behave like javascript encodeURIComponent()
var encoded = Uri.EscapeDataString(url);
encoded = encoded.Replace("%28", "(");
encoded = encoded.Replace("%29", ")");
return encoded;
}
}
}
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