/// <summary>
/// Calculates the URL to redirect the user to Flickr web site for
/// authentication. Used by desktop application.
/// See <see cref="AuthGetFrob"/> for example code.
/// </summary>
/// <param name="frob">The FROB to be used for authentication.</param>
/// <param name="authLevel">The <see cref="AuthLevel"/> stating the maximum authentication level your application requires.</param>
/// <returns>The url to redirect the user to.</returns>
public string AuthCalcUrl(string frob, AuthLevel authLevel)
{
if (sharedSecret == null)
{
throw new SignatureRequiredException();
}
string hash = sharedSecret + "api_key" + apiKey + "frob" + frob + "perms" + UtilityMethods.AuthLevelToString(authLevel);
hash = UtilityMethods.MD5Hash(hash);
string url = AuthUrl + "?api_key=" + apiKey + "&perms=" + UtilityMethods.AuthLevelToString(authLevel) + "&frob=" + frob;
url += "&api_sig=" + hash;
return(url);
}
private StreamCollection CreateUploadData(Stream imageStream, string fileName, Dictionary <string, string> parameters, string boundary)
{
var keys = new string[parameters.Keys.Count];
parameters.Keys.CopyTo(keys, 0);
Array.Sort(keys);
var hashStringBuilder = new StringBuilder(sharedSecret, 2 * 1024);
var ms1 = new MemoryStream();
var contentStringBuilder = new StreamWriter(ms1, new UTF8Encoding(false));
foreach (var key in keys)
{
hashStringBuilder.Append(key);
hashStringBuilder.Append(parameters[key]);
contentStringBuilder.Write("--" + boundary + "\r\n");
contentStringBuilder.Write("Content-Disposition: form-data; name=\"" + key + "\"\r\n");
contentStringBuilder.Write("\r\n");
contentStringBuilder.Write(parameters[key] + "\r\n");
}
contentStringBuilder.Write("--" + boundary + "\r\n");
contentStringBuilder.Write("Content-Disposition: form-data; name=\"api_sig\"\r\n");
contentStringBuilder.Write("\r\n");
contentStringBuilder.Write(UtilityMethods.MD5Hash(hashStringBuilder.ToString()) + "\r\n");
// Photo
contentStringBuilder.Write("--" + boundary + "\r\n");
contentStringBuilder.Write("Content-Disposition: form-data; name=\"photo\"; filename=\"" + Path.GetFileName(fileName) + "\"\r\n");
contentStringBuilder.Write("Content-Type: image/jpeg\r\n");
contentStringBuilder.Write("\r\n");
contentStringBuilder.Flush();
var photoContents = ConvertNonSeekableStreamToByteArray(imageStream);
var ms2 = new MemoryStream();
var postFooterWriter = new StreamWriter(ms2, new UTF8Encoding(false));
postFooterWriter.Write("\r\n--" + boundary + "--\r\n");
postFooterWriter.Flush();
var collection = new StreamCollection(new[] { ms1, photoContents, ms2 });
return(collection);
}
private string CalculateAuthSignature(Dictionary <string, string> parameters)
{
#if !SILVERLIGHT
var sorted = new SortedList <string, string>();
foreach (var pair in parameters)
{
sorted.Add(pair.Key, pair.Value);
}
#else
var sorted = parameters.OrderBy(p => p.Key);
#endif
var sb = new StringBuilder(ApiSecret);
foreach (var pair in sorted)
{
sb.Append(pair.Key);
sb.Append(pair.Value);
}
return(UtilityMethods.MD5Hash(sb.ToString()));
}
/// <summary>
/// Calculates the URL to redirect the user to Flickr web site for
/// authentication. Used by Web applications.
/// See <see cref="AuthGetFrob"/> for example code.
/// </summary>
/// <param name="authLevel">The <see cref="AuthLevel"/> stating the maximum authentication level your application requires.</param>
/// <param name="extra">An extra string value which Flickr will return to the callback URL along with the frob.</param>
/// <returns>The url to redirect the user to.</returns>
public string AuthCalcWebUrl(AuthLevel authLevel, string extra)
{
CheckApiKey();
CheckSigned();
string textToHash = sharedSecret + "api_key" + apiKey;
string url = AuthUrl + "?api_key=" + apiKey + "&perms=" + UtilityMethods.AuthLevelToString(authLevel);
if (!string.IsNullOrEmpty(extra))
{
textToHash += "extra" + extra;
url += "&extra=" + Uri.EscapeDataString(extra);
}
textToHash += "perms" + UtilityMethods.AuthLevelToString(authLevel);
string hash = UtilityMethods.MD5Hash(textToHash);
url += "&api_sig=" + hash;
return(url);
}
