internal static void AddHeaders(this SortedDictionary <string, string> canonicalized, IReadOnlyDictionary <string, IReadOnlyCollection <string> > headersToAdd)
{
if (headersToAdd == null)
{
return;
}
foreach (var pair in headersToAdd)
{
if (pair.Value == null)
{
continue;
}
var headerName = pair.Key.ToLowerInvariant();
// Note: the comma-space separating here is because this is what HttpClient does.
// Google Cloud Storage itself will just use commas if it receives multiple values for the same header name,
// but HttpClient coalesces the values itself. This approach means that if the same request is made from .NET
// with the signed URL, it will succeed - but it does mean that the signed URL won't be valid when used from
// another platform that sends actual multiple values.
var value = string.Join(", ", pair.Value.Select(v => UrlSigner.PrepareHeaderValue(v, true))).Trim();
if (canonicalized.TryGetValue(headerName, out var existingValue))
{
value = $"{existingValue}, {value}";
}
canonicalized[headerName] = value;
}
}
internal static void AddHeader(this SortedDictionary <string, string> canonicalized, string key, string value)
{
if (key == null || value == null)
{
return;
}
var headerName = key.ToLowerInvariant();
// Note: the comma-space separating here is because this is what HttpClient does.
// Google Cloud Storage itself will just use commas if it receives multiple values for the same header name,
// but HttpClient coalesces the values itself. This approach means that if the same request is made from .NET
// with the signed URL, it will succeed - but it does mean that the signed URL won't be valid when used from
// another platform that sends actual multiple values.
var headerValue = UrlSigner.PrepareHeaderValue(value, true).Trim();
if (canonicalized.TryGetValue(headerName, out var existingValue))
{
headerValue = $"{existingValue}, {headerValue}";
}
canonicalized[headerName] = headerValue;
}
/// <summary>
/// Creates a new <see cref="UrlSigner"/> instance for a service account.
/// </summary>
/// <param name="credentialData">The stream from which to read the JSON key data for a service account. Must not be null.</param>
/// <exception cref="InvalidOperationException">
/// The <paramref name="credentialData"/> does not contain valid JSON service account key data.
/// </exception>
public static UrlSigner FromServiceAccountData(Stream credentialData)
{
GaxPreconditions.CheckNotNull(credentialData, nameof(credentialData));
return(UrlSigner.FromServiceAccountCredential(ServiceAccountCredential.FromServiceAccountData(credentialData)));
}