File size: 3,792 Bytes
7b715bc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | // Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
using Google.Apis.Requests;
using Google.Apis.Util;
using Newtonsoft.Json;
using System.Net.Http;
using System.Threading.Tasks;
namespace Google.Apis.Responses
{
/// <summary>
/// Extensions for <see cref="HttpResponseMessage"/> to help with parasing errors as returned
/// by some Google services.
/// </summary>
public static class HttpResponseMessageExtensions
{
/// <summary>
/// Attempts to deserialize a <see cref="RequestError"/> from the <paramref name="response"/>.
/// </summary>
/// <remarks>
/// This method will throw a <see cref="GoogleApiException"/> if:
/// <list type="bullet">
/// <item>The <paramref name="response"/> or its <see cref="HttpResponseMessage.Content"/> are null.</item>
/// <item>Or the deserialization attempt throws a <see cref="JsonException"/>.</item>
/// <item>Or the deserilization attempt returns null.</item>
/// </list>
/// Any exception thrown while reading the <paramref name="response"/> <see cref="HttpResponseMessage.Content"/>
/// will be bubbled up.
/// Otherwise this method will return the deserialized <see cref="RequestError"/>.
/// </remarks>
public static async Task<RequestError> DeserializeErrorAsync(this HttpResponseMessage response, string name, ISerializer serializer)
{
if (response?.Content is null)
{
// We throw GoogleApiException (instead of NullArgumentException)
// as a more friendly way to signal users that something went wrong,
// which in this case is very unlikely to have been because of a bug
// in calling code.
throw new GoogleApiException(name)
{
HttpStatusCode = response?.StatusCode ?? default
};
}
// If we can't even read the response, let that exception bubble up.
// Note that very likely this will never happen here, as we are usually reading from a buffer.
// If there were actual problems reading the content, HttpClient has already thrown when
// filling the buffer in.
var responseText = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
RequestError error;
try
{
error = serializer.Deserialize<StandardResponse<object>>(responseText)?.Error;
}
catch (JsonException ex)
{
throw new GoogleApiException(name, message: null, ex)
{
HttpStatusCode = response.StatusCode,
Error = new RequestError { ErrorResponseContent = responseText }
};
}
if (error is null)
{
throw new GoogleApiException(name)
{
HttpStatusCode = response.StatusCode,
Error = new RequestError { ErrorResponseContent = responseText }
};
}
error.ErrorResponseContent = responseText;
return error;
}
}
}
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