private async Task <ImageMessage> InternalUploadPictureAsync(PictureTarget type, Stream image)
{
HttpContent sessionKeyContent = new StringContent(SessionInfo.SessionKey);
sessionKeyContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "sessionKey"
};
HttpContent typeContent = new StringContent(type.ToString().ToLower());
typeContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "type"
};
HttpContent imageContent = new StreamContent(image);
typeContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "img"
};
HttpContent[] contents = new HttpContent[]
{
sessionKeyContent,
typeContent,
imageContent
};
using JsonDocument j = await HttpHelper.HttpPostAsync($"{SessionInfo.Options.BaseUrl}/uploadImage", contents);
JsonElement root = j.RootElement;
int code = root.GetProperty("code").GetInt32();
if (code == 0)
{
return(Utils.Deserialize <ImageMessage>(in root));
}
return(ThrowCommonException <ImageMessage>(code, in root));
}
private async Task <ImageMessage> InternalUploadPictureAsync(PictureTarget type, Stream imgStream)
{
if (ApiVersion <= new Version(1, 7, 0))
{
Guid guid = Guid.NewGuid();
ImageHttpListener.RegisterImage(guid, imgStream);
return(new ImageMessage(null, $"http://127.0.0.1:{ImageHttpListener.Port}/fetch?guid={guid:n}", null));
}
HttpContent sessionKeyContent = new StringContent(SessionInfo.SessionKey);
sessionKeyContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "sessionKey"
};
HttpContent typeContent = new StringContent(type.ToString().ToLower());
typeContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "type"
};
string format;
using (Image img = Image.FromStream(imgStream))
{
format = img.RawFormat.ToString();
switch (format)
{
case nameof(ImageFormat.Jpeg):
case nameof(ImageFormat.Png):
case nameof(ImageFormat.Gif):
{
format = format.ToLower();
break;
}
default: // 不是以上三种类型的图片就强转为Png
{
MemoryStream ms = new MemoryStream();
img.Save(ms, ImageFormat.Png);
imgStream.Dispose();
imgStream = ms;
format = "png";
break;
}
}
}
imgStream.Seek(0, SeekOrigin.Begin);
HttpContent imageContent = new StreamContent(imgStream);
imageContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "img",
FileName = $"{Guid.NewGuid():n}.{format}"
};
imageContent.Headers.ContentType = new MediaTypeHeaderValue("image/" + format);
HttpContent[] contents = new HttpContent[]
{
sessionKeyContent,
typeContent,
imageContent
};
try
{
using JsonDocument j = await HttpHelper.HttpPostAsync($"{SessionInfo.Options.BaseUrl}/uploadImage", contents).GetJsonAsync(token: SessionInfo.Canceller.Token);
JsonElement root = j.RootElement;
if (root.TryGetProperty("code", out JsonElement code)) // 正常返回是没有code的
{
return(ThrowCommonException <ImageMessage>(code.GetInt32(), in root));
}
return(Utils.Deserialize <ImageMessage>(in root));
}
catch (JsonException) // https://github.com/mamoe/mirai-api-http/issues/85
{
throw new NotSupportedException("当前版本的mirai-api-http无法发送图片。");
}
}
/// <summary>
/// 内部使用
/// </summary>
/// <exception cref="InvalidOperationException"/>
/// <param name="type">目标类型</param>
/// <param name="imgStream">图片流</param>
/// <remarks>
/// 注意: 当 mirai-api-http 的版本小于等于v1.7.0时, 本方法返回的将是一个只有 Url 有值的 <see cref="ImageMessage"/>
/// </remarks>
/// <returns>一个 <see cref="ImageMessage"/> 实例, 可用于以后的消息发送</returns>
private Task <ImageMessage> InternalUploadPictureAsync(InternalSessionInfo session, PictureTarget type, Stream imgStream)
{
if (session.ApiVersion <= new Version(1, 7, 0))
{
Guid guid = Guid.NewGuid();
ImageHttpListener.RegisterImage(guid, imgStream);
return(Task.FromResult(new ImageMessage(null, $"http://127.0.0.1:{ImageHttpListener.Port}/fetch?guid={guid:n}", null)));
}
HttpContent sessionKeyContent = new StringContent(session.SessionKey);
sessionKeyContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "sessionKey"
};
HttpContent typeContent = new StringContent(type.ToString().ToLower());
typeContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "type"
};
string format;
using (Image img = Image.FromStream(imgStream))
{
format = img.RawFormat.ToString();
switch (format)
{
case nameof(ImageFormat.Jpeg):
case nameof(ImageFormat.Png):
case nameof(ImageFormat.Gif):
{
format = format.ToLower();
break;
}
default: // 不是以上三种类型的图片就强转为Png
{
MemoryStream ms = new MemoryStream();
img.Save(ms, ImageFormat.Png);
imgStream.Dispose();
imgStream = ms;
format = "png";
break;
}
}
}
imgStream.Seek(0, SeekOrigin.Begin);
HttpContent imageContent = new StreamContent(imgStream);
imageContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
{
Name = "img",
FileName = $"{Guid.NewGuid():n}.{format}"
};
imageContent.Headers.ContentType = new MediaTypeHeaderValue("image/" + format);
HttpContent[] contents = new HttpContent[]
{
sessionKeyContent,
typeContent,
imageContent
};
return(InternalHttpPostNoSuccCodeAsync <ImageMessage, ImageMessage>(session.Client, $"{session.Options.BaseUrl}/uploadImage", contents, session.Token)
.ContinueWith(t => t.IsFaulted && t.Exception !.InnerException is JsonException ? Task.FromException <ImageMessage>(new NotSupportedException("当前版本的mirai-api-http无法发送图片。")) : t, TaskContinuationOptions.ExecuteSynchronously).Unwrap());
// ^-- 处理 JsonException 到 NotSupportedException, https://github.com/mamoe/mirai-api-http/issues/85
}