private static HttpContent CreateContent(PreserveMetadata metadata, string type)
{
if (metadata == PreserveMetadata.None)
{
return(null);
}
var preserve = new List <string>();
if (metadata.HasFlag(PreserveMetadata.Copyright))
{
preserve.Add("copyright");
}
if (metadata.HasFlag(PreserveMetadata.Creation))
{
if (type != JpegType)
{
throw new InvalidOperationException($"Creation metadata can only be preserved with type {JpegType}");
}
preserve.Add("creation");
}
if (metadata.HasFlag(PreserveMetadata.Location))
{
if (type != JpegType)
{
throw new InvalidOperationException($"Location metadata can only be preserved with type {JpegType}");
}
preserve.Add("location");
}
var json = JsonConvert.SerializeObject(new { preserve });
return(new StringContent(json, System.Text.Encoding.UTF8, "application/json"));
}
/// <summary>
/// Downloads the result of a TinyPng Compression operation
/// </summary>
/// <param name="compressResponse"></param>
/// <param name="metadata"></param>
/// <returns></returns>
public static async Task <TinyPngImageResponse> Download(this TinyPngCompressResponse compressResponse, PreserveMetadata metadata = PreserveMetadata.None)
{
if (compressResponse == null)
{
throw new ArgumentNullException(nameof(compressResponse));
}
var msg = new HttpRequestMessage(HttpMethod.Get, compressResponse.Output.Url)
{
Content = CreateContent(metadata, compressResponse.Output.Type)
};
var response = await compressResponse.HttpClient.SendAsync(msg).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
return(new TinyPngImageResponse(response));
}
var errorMsg = JsonConvert.DeserializeObject <ApiErrorResponse>(await response.Content.ReadAsStringAsync());
throw new TinyPngApiException((int)response.StatusCode, response.ReasonPhrase, errorMsg.Error, errorMsg.Message);
}
/// <summary>
/// Downloads the result of a TinyPng Compression operation
/// </summary>
/// <param name="compressResponse"></param>
/// <param name="metadata"></param>
/// <returns></returns>
public static async Task <TinyPngImageResponse> Download(this Task <TinyPngCompressResponse> compressResponse, PreserveMetadata metadata = PreserveMetadata.None)
{
if (compressResponse == null)
{
throw new ArgumentNullException(nameof(compressResponse));
}
var compressResult = await compressResponse;
return(await Download(compressResult, metadata));
}
