I'm trying to post an image to the StockTwits API and am receiving a 422 error as a response saying that the image format can't be recognized. The image is a png file, so it should be a valid file format. I've tried using a jpeg with the same response.
Am I encoding the image incorrectly, or missing some configuration in the HttpClient?
public void Share(string text, string imageFilePath)
{
using(HttpClient client = new HttpClient())
using (MultipartFormDataContent formData = new MultipartFormDataContent())
{
string url = stocktwitsCreateMessageUrl + "&" +
"body=" + Core.Globals.UrlEncode(twit) + "&" +
"sentiment=" + StockTwitsSentiment.ToString().ToLower();
byte[] imageBytes = File.ReadAllBytes(imageFilePath);
HttpContent imageContent = new ByteArrayContent(imageBytes);
string fileName = Path.GetFileName(imageFilePath);
formData.Add(imageContent, "chart", fileName);
HttpResponseMessage stockTwitsResponse = await client.PostAsync(url, formData);
Stream responseContent = await stockTwitsResponse.Content.ReadAsStreamAsync();
string result = new StreamReader(responseContent).ReadToEnd();
Print(result); // helper method
if (!stockTwitsResponse.IsSuccessStatusCode)
{
LogErrorResponse(result, stockTwitsResponse);
return;
}
else
LogAndPrint(typeof(Custom.Resource), "ShareStockTwitsSentSuccessfully", new[] { Name }, Cbi.LogLevel.Information);
}
}
Response:
{
"response": { "status": 422 },
"errors": [ { "message": "We couldn't recognize the image format. Format must be one of: image/jpg image/jpeg image/pjpeg image/png image/x-png image/gif" } ]
}
