public sys_file UploadFile(Stream stream, string fileSuffix, string fileType, string contentType, string objectId, string fileName = "")
{
var id = Guid.NewGuid().ToString();
var hash_code = SHAUtil.GetFileSHA1(stream);
var newFileName = $"{id}.{fileSuffix}"; // GUID 生成文件名
// 保存图片到本地
// TODO：执行失败回滚操作
var config = StoreConfig.Config;
ServiceContainer.Resolve <IStoreStrategy>(config.Type).Upload(stream, newFileName, out var filePath);
var sysFile = new sys_file()
{
sys_fileId = id,
name = fileName,
real_name = newFileName,
hash_code = hash_code,
file_type = fileType,
objectId = objectId,
content_type = contentType,
DownloadUrl = GetDownloadUrl(id)
};
CreateData(sysFile);
return(sysFile);
}
private string DownloadImage(string url, string objectid)
{
var result = HttpUtil.DownloadImage(url, out var contentType);
var stream = StreamUtil.BytesToStream(result);
var hash_code = SHAUtil.GetFileSHA1(stream);
var config = StoreConfig.Config;
var id = Guid.NewGuid().ToString();
var fileName = $"{id}.{url.Substring(url.LastIndexOf("/") + 1).GetFileType()}";
ServiceContainer.Resolve <IStoreStrategy>(config?.Type).Upload(stream, fileName, out var filePath);
var data = new sys_file()
{
sys_fileId = id,
name = fileName,
real_name = fileName,
hash_code = hash_code,
file_type = "gallery",
content_type = contentType,
objectId = objectid
};
return(Broker.Create(data));
}
/// <summary>
/// 验证微信签名
/// </summary>
/// <param name="signature"></param>
/// <param name="timestamp"></param>
/// <param name="nonce"></param>
/// <param name="echostr"></param>
/// <returns></returns>
public static bool CheckSignature(string signature, string timestamp, string nonce, string echostr)
{
string[] arrTmp = { _token, timestamp, nonce };
Array.Sort(arrTmp);
var tmpStr = string.Join("", arrTmp);
tmpStr = SHAUtil.GetSwcSHA1(tmpStr).ToLower();
return(tmpStr == signature);
}
public void GetStringSHA1Hash_Test()
{
var expected1 = "4a48f2d80b881e9ac7d607f23412823e9305e433";
var sha1_1 = SHAUtil.GetHex16StringSHA1Hash("HelloChinese");
Assert.Equal(expected1, sha1_1, ignoreCase: true);
var expected2 = "Skjy2AuIHprH1gfyNBKCPpMF5DM=";
var sha1_2 = SHAUtil.GetBase64StringSHA1Hash("HelloChinese");
Assert.Equal(expected2, sha1_2, ignoreCase: true);
}
public void GetStringSHA512Hash_Test()
{
var expected1 = "ffcdc9277553ea18aae8c1260dd49c5e3bd1055f54fe194745e79f832de6402844efdea7b0c34428d75f640333cd310debf3de03b96c1f13debc8fee4ec91651";
var sha512_1 = SHAUtil.GetHex16StringSHA512Hash("Hinatahi");
Assert.Equal(expected1, sha512_1, ignoreCase: true);
var expected2 = "ZQp2BVSIKdSMldXMxZozrUm7elOK3W3NwEKjkmpdZ8A2YTwGEYJxdihov55phjUXGaLixs+IjA8vNoktL8PIHg==";
var sha512_2 = SHAUtil.GetBase64StringSHA512Hash("Helloword");
Assert.Equal(expected2, sha512_2, ignoreCase: true);
}
public void GetStringSHA256Hash_Test()
{
var expected1 = "872e4e50ce9990d8b041330c47c9ddd11bec6b503ae9386a99da8584e9bb12c4";
var sha256_1 = SHAUtil.GetHex16StringSHA256Hash("HelloWorld");
Assert.Equal(expected1, sha256_1, ignoreCase: true);
var expected2 = "hy5OUM6ZkNiwQTMMR8nd0Rvsa1A66ThqmdqFhOm7EsQ=";
var sha256_2 = SHAUtil.GetBase64StringSHA256Hash("HelloWorld");
Assert.Equal(expected2, sha256_2, ignoreCase: true);
}
/// <summary>获取图片的二进制数据
/// </summary>
/// <param name="imagePath">图片保存路径</param>
/// <param name="resizeParameter">图片尺寸调整参数</param>
/// <param name="lastWriteTimeUtc">最后修改时间</param>
/// <returns></returns>
public async Task <byte[]> GetImageData(string imagePath, ResizeParameter resizeParameter, DateTime lastWriteTimeUtc)
{
try
{
var key = $"{imagePath}{resizeParameter}{lastWriteTimeUtc:yyyy-MM-dd HH:mm:ss}";
var cacheKey = $"Image:{SHAUtil.GetHex16StringSHA1Hash(key)}";
byte[] imageBytes;
if (_option.EnableImageCache)
{
var imageCacheItem = await _imageCache.GetAsync(cacheKey);
if (imageCacheItem != null)
{
return(imageCacheItem.Data);
}
}
//图片操作
var image = Image.FromFile(imagePath);
//对图片进行相应的操作,放大等
Image resizeImage = null;
if (resizeParameter.Mode == ResizeMode.Zoom)
{
resizeImage = ImageResize.ImageResizer.Zoom(image, resizeParameter);
}
else if (resizeParameter.Mode == ResizeMode.Crop)
{
//图片裁剪
resizeImage = ImageResize.ImageResizer.Crop(image, resizeParameter);
}
var imageFormat = ImageUtil.GetImageFormatByFormatName(resizeParameter.Format);
imageBytes = ImageHelper.ImageCompressToBytes(resizeImage, resizeParameter.Quality, imageFormat);
image.Dispose();
//只有开启图片缓存情况下,才会对图片再次进行缓存
if (_option.EnableImageCache)
{
//将图片缓存
await _imageCache.SetAsync(cacheKey, new ImageCacheItem(imageBytes), new DistributedCacheEntryOptions()
{
SlidingExpiration = TimeSpan.FromSeconds(_option.ImageCacheSlidingExpirationSeconds)
});
}
return(imageBytes);
}
catch (Exception ex)
{
_logger.LogError("Resize图片出现错误,{0}", ex.Message);
}
return(default);
public void Execute(PersistBrokerPluginContext context)
{
var entity = context.Entity as wechat_material;
switch (context.Action)
{
case EntityAction.PreCreate:
case EntityAction.PreUpdate:
// 如果素材未上传到系统，则根据url请求图片保存
if (string.IsNullOrEmpty(entity.sys_fileid))
{
var result = HttpUtil.DownloadImage(entity.url, out var contentType);
var id = Guid.NewGuid().ToString();
var stream = StreamUtil.BytesToStream(result);
var hash_code = SHAUtil.GetFileSHA1(stream);
var config = StoreConfig.Config;
ServiceContainer.Resolve<IStoreStrategy>(config?.Type).Upload(stream, entity.name, out var filePath);
var sysImage = new sys_file()
{
sys_fileId = id,
name = entity.name,
real_name = entity.name,
hash_code = hash_code,
file_type = "wechat_material",
content_type = contentType,
objectId = entity.Id
};
new SysFileService(context.Broker).CreateData(sysImage);
entity.sys_fileid = id;
entity.local_url = SysFileService.GetDownloadUrl(id);
}
break;
case EntityAction.PreDelete:
WeChatApi.DeleteMaterial(entity.GetAttributeValue<string>("media_id"));
context.Broker.Delete("sys_file", entity.GetAttributeValue<string>("sys_fileid"));
break;
default:
break;
}
}
