/// <summary>
/// Queries Reddit to get the S3 data required for <see cref="UploadImage"/>
/// </summary>
/// <param name="ad">Advertisement to be created</param>
/// <param name="adUh">Reddit's advertisement creation page modhash</param>
/// <returns></returns>
private AdS3Json GetAdS3Data(Advertisement ad, string adUh)
{
string adS3PostString = $"kind=thumbnail&link=&filepath={Uri.EscapeDataString(ad.ThumbnailName)}&uh={adUh}&ajax=true&raw_json=1";
const string adS3Url = "https://www.reddit.com/api/ad_s3_params.json";
var adS3Request = WebRequest.Create(adS3Url) as HttpWebRequest;
AdS3Json adS3Data = new AdS3Json();
if (adS3Request != null)
{
adS3Request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
adS3Request.Method = "POST";
adS3Request.CookieContainer = Cookies;
adS3Request.Accept = "application/json, text/javascript, */*; q=0.01";
adS3Request.AutomaticDecompression = DecompressionMethods.GZip |
DecompressionMethods.Deflate;
adS3Request.UserAgent =
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36";
adS3Request.Referer = "https://www.reddit.com/";
adS3Request.Timeout = 15000;
var adS3CustomHeaders = adS3Request.Headers;
adS3CustomHeaders.Add("accept-language", "en;q=0.4");
adS3CustomHeaders.Add("origin", "https://www.reddit.com");
adS3CustomHeaders.Add("x-requested-with", "XMLHttpRequest");
var adS3Bytes = Encoding.ASCII.GetBytes(adS3PostString);
adS3Request.ContentLength = adS3Bytes.Length;
using (var os = adS3Request.GetRequestStream())
{
os.Write(adS3Bytes, 0, adS3Bytes.Length);
}
var adS3Response = adS3Request.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.GetEncoding(adS3Response.CharacterSet))
)
{
adS3Data = JsonConvert.DeserializeObject <AdS3Json>(sr.ReadToEnd());
}
}
}
}
}
return(adS3Data);
}
/// <summary>
/// Upload advertisement's image to Reddit's AWS S3 bucket
/// </summary>
/// <param name="adS3Data">Object containing all the info needed for the authentication to S3</param>
/// <param name="imgPathText">Image's path</param>
/// <param name="ad">Advertisement to be created</param>
private void UploadImage(AdS3Json adS3Data, string imgPathText, Advertisement ad)
{
var imgPath = Path.Combine(imgPathText, ad.ThumbnailName);
if (File.Exists(imgPath))
{
using (var fs = new FileStream(imgPath, FileMode.Open, FileAccess.Read))
{
var data = new byte[fs.Length];
fs.Read(data, 0, data.Length);
var postParameters = new Dictionary <string, object>
{
{ "acl", "public-read" },
{ "key", adS3Data.Fields[1].Value },
{ "X-Amz-Credential", adS3Data.Fields[2].Value },
{ "X-Amz-Algorithm", adS3Data.Fields[3].Value },
{ "X-Amz-Date", adS3Data.Fields[4].Value },
{ "success_action_status", adS3Data.Fields[5].Value },
{ "content-type", adS3Data.Fields[6].Value },
{ "x-amz-storage-class", adS3Data.Fields[7].Value },
{ "x-amz-meta-ext", adS3Data.Fields[8].Value },
{ "policy", adS3Data.Fields[9].Value },
{ "X-Amz-Signature", adS3Data.Fields[10].Value },
{ "x-amz-security-token", adS3Data.Fields[11].Value },
{
"file",
new FormUpload.FileParameter(data, ad.ThumbnailName,
adS3Data.Fields[6].Value)
}
};
FormUpload.MultipartFormDataPost("https://reddit-client-uploads.s3.amazonaws.com/",
"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36", postParameters);
}
}
else
{
throw new FileNotFoundException("File does not exist on the specified directory!");
}
}
