/// <summary>
/// Connects imgur's upload/checkcaptcha endpoint to check if a captcha has to be solved before uploading an image, will return false if a captcha has to be solved or if any exceptions ocurred
/// </summary>
/// <param name="cookies">Cookies needed to complete the request</param>
/// <param name="imgurData">Imgur album data to be collected from the endpoint if no captcha is required</param>
/// <param name="errorMessage">Error message to be reported to the user if any exceptions were thrown</param>
/// <returns></returns>
private bool checkCaptcha(CookieContainer cookies, ref ImgurAlbumData imgurData, ref string errorMessage)
{
const string captchaUrl = "http://imgur.com/upload/checkcaptcha";
var data = new ImgurAlbumData();
try
{
var task = Task.Factory.StartNew(() =>
{
var captchaRequest = WebRequest.Create(captchaUrl) as HttpWebRequest;
if (captchaRequest != null)
{
var captchaPostString = "total_uploads=1&create_album=true";
captchaRequest.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
captchaRequest.Method = "POST";
captchaRequest.CookieContainer = cookies;
captchaRequest.Accept = "*/*";
captchaRequest.AutomaticDecompression = DecompressionMethods.GZip |
DecompressionMethods.Deflate;
captchaRequest.UserAgent =
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36";
captchaRequest.Referer = "http://imgur.com";
captchaRequest.KeepAlive = true;
var captchaCustomHeaders = captchaRequest.Headers;
captchaCustomHeaders.Add("Accept-Language", "en;q=0.8");
captchaCustomHeaders.Add("origin", "http://imgur.com");
captchaCustomHeaders.Add("x-requested-with", "XMLHttpRequest");
var captchaBytes = Encoding.ASCII.GetBytes(captchaPostString);
captchaRequest.ContentLength = captchaBytes.Length;
using (var os = captchaRequest.GetRequestStream())
{
os.Write(captchaBytes, 0, captchaBytes.Length);
}
var adS3Response = captchaRequest.GetResponse() as HttpWebResponse;
if (adS3Response != null && adS3Response.StatusCode == HttpStatusCode.OK)
{
using (var s = adS3Response.GetResponseStream())
{
if (s != null)
{
using (
// ReSharper disable once AssignNullToNotNullAttribute
var sr = new StreamReader(s, Encoding.UTF8)
)
{
data = JsonConvert.DeserializeObject <ImgurAlbumData>(sr.ReadToEnd());
}
}
}
}
}
});
try
{
task.Wait();
}
catch (AggregateException ae)
{
if (ae.InnerException != null)
{
errorMessage = ae.InnerException.Message + Environment.NewLine + ae.StackTrace;
}
else
{
errorMessage = ae.Message + Environment.NewLine + ae.StackTrace;
}
ae.Handle(x => false);
}
}
catch (Exception e)
{
if (e.InnerException != null)
{
errorMessage = e.InnerException.Message + Environment.NewLine + e.StackTrace;
}
else
{
errorMessage = e.Message + Environment.NewLine + e.StackTrace;
}
return(false);
}
if (data == null)
{
return(false);
}
imgurData = data;
return(imgurData.Success);
}
/// <summary>
/// Upload image to Imgur.
/// </summary>
/// <param name="isSocial">Sets if the string is for a social network post.</param>
/// <returns>A Task object to be used in async methods</returns>
private async Task UploadImage(bool isSocial)
{
//If string.IsNullOrEmpty(_imgurUrl) == true it means that user hasn't uploaded any images while current program's execution
if (string.IsNullOrEmpty(_imgurUrl))
{
var cookies = GetCookies();
var imgurData = new ImgurAlbumData();
var imgurImageData = new ImgurImageData();
var errorMessage = string.Empty;
ProgressLabel.Content = "Checking captcha";
ProgressLabel.Visibility = Visibility.Visible;
GeneralProgressBar.Visibility = Visibility.Visible;
//Check if imgur asks for captcha first
if (!checkCaptcha(cookies, ref imgurData, ref errorMessage))
{
MessageBox.Show(errorMessage, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
else
{
//We have an OK and album data from imgur to upload images
if (imgurData.Success)
{
//Generate image
ProgressLabel.Content = "Generating image";
var file = new FileInfo(CreateImage(true));
if (File.Exists(file.FullName))
{
ProgressLabel.Content = "Uploading image";
//Upload image using as a multipart form
var task = Task.Factory.StartNew(() =>
{
using (var fs = new FileStream(file.FullName, FileMode.Open, FileAccess.Read))
{
var data = new byte[fs.Length];
fs.Read(data, 0, data.Length);
var postParameters = new Dictionary <string, object>
{
{ "new_album_id", imgurData.Data.NewAlbumId },
{
"file",
new FormUpload.FileParameter(data, file.Name,
MimeMapping.GetMimeMapping(file.FullName))
}
};
using (var s = FormUpload.MultipartFormDataPost("http://imgur.com/upload",
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36",
postParameters, cookies)
.GetResponseStream())
{
if (s != null)
{
using (var sr = new StreamReader(s, Encoding.UTF8))
{
imgurImageData =
JsonConvert.DeserializeObject <ImgurImageData>(sr.ReadToEnd());
}
}
}
}
});
//Wait for task completion
await task;
//If it isn't for a social site, show a textbox to allow the user to copy imgur's URL
if (!isSocial)
{
ImgurDataGrid.Visibility = Visibility.Visible;
ImgurUrlTxtBx.Text = $"http://imgur.com/{imgurImageData.Data.Hash}";
_imgurUrl = ImgurUrlTxtBx.Text;
}
//Otherwise store it for future use (to avoid unneeded HTTP calls)
else
{
ImgurUrlTxtBx.Text = $"http://imgur.com/{imgurImageData.Data.Hash}";
_imgurUrl = ImgurUrlTxtBx.Text;
}
File.Delete(file.FullName);
}
else
{
MessageBox.Show("File does not exist on the specified directory!", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
else
{
MessageBox.Show("Try again later!", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
ProgressLabel.Content = "";
ProgressLabel.Visibility = Visibility.Hidden;
GeneralProgressBar.Visibility = Visibility.Hidden;
}
else
{
//Just show a textbox to allow the user to copy imgur's URL
if (!isSocial)
{
ImgurDataGrid.Visibility = Visibility.Visible;
}
}
}