public async Task <PresignedURL> PerformPresignedURLFetch(Tokens tokens, string bucketName, string deviceID, string fileExt,
string patientName, string doctorUsername, string fileName)
{
using (var httpClient = new HttpClient {
BaseAddress = new Uri(config.BasePath)
})
{
HashAlgorithm hashAlgorithm = MD5.Create();
StringBuilder sb = new StringBuilder();
var hashArray = hashAlgorithm.ComputeHash(Encoding.UTF8.GetBytes(fileName));
foreach (byte b in hashArray)
{
sb.Append(b);
}
var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString();
var presignedURLInfo = new PresignedURLPostInfo()
{
BucketName = bucketName, DeviceID = deviceID, FileExtension = fileExt,
PatientName = patientName, PatientDoctorUserName = doctorUsername, FileName = sb.ToString()
};
var jsonPresignedURLInfo = JsonConvert.SerializeObject(presignedURLInfo);
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Token", tokens.AccessToken);
var content = new StringContent(jsonPresignedURLInfo.ToString(), Encoding.UTF8, "application/json");
using (var resp = await httpClient.PostAsync(endpoint, content))
{
if (resp.IsSuccessStatusCode)
{
var presignedURL = await resp.Content.ReadAsStringAsync();
PresignedURL url = JsonConvert.DeserializeObject <PresignedURL>(presignedURL);
return(url);
}
else
{
return(null);
}
}
}
}
public static async Task <bool> PerformUploadS3DirectAsync(Stream stream, PresignedURL url)
{
HttpWebRequest httpRequest = WebRequest.Create(url.UploadURL) as HttpWebRequest;
httpRequest.Method = "PUT";
using (Stream uploadStream = httpRequest.GetRequestStream())
{
var buffer = new byte[1000000];
int bytesRead = 0;
while ((bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length)) > 0)
{
await uploadStream.WriteAsync(buffer, 0, bytesRead);
}
}
HttpWebResponse response = await httpRequest.GetResponseAsync() as HttpWebResponse;
return(response.StatusCode == HttpStatusCode.OK || response.StatusCode == HttpStatusCode.NoContent);
}
