/// <summary>
/// 上传文件的具体实现
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public virtual async Task <UploadOutput> UploadCoreAsync(UploadCoreInput input)
{
var output = new UploadOutput();
try
{
//文件保存的绝对路径
var absolutePath = Path.Combine($"{ServiceConfig.WebRootPath}\\", $"{input.UrlPrefix}{input.FileName}");
if (!Directory.Exists(Path.GetDirectoryName(absolutePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(absolutePath));
}
File.WriteAllBytes(absolutePath, input.FileBytes);
output.State = "SUCCESS";
output.Original = input.OriginalFileName;
output.Url = Path.GetRelativePath(Path.Combine($"{ServiceConfig.WebRootPath}\\", input.UrlPrefix), absolutePath).Replace("\\", "/");
}
catch (Exception ex)
{
throw new UEditorServiceException("文件访问错误", ex.Message);
}
return(await Task.FromResult(output));
}
/// <summary>
/// 封装上传文件需要的参数
/// </summary>
/// <returns></returns>
public async Task <UploadCoreInput> GetUploadParamAsync()
{
UploadCoreInput input = new UploadCoreInput();
var uploadFieldName = "";
var allowExtensionList = new List <string>();
var allowSize = 0;
var format = "";
var urlPrefix = "";
//涂鸦和截图均为Base64数据上传
var isBase64Content = "uploadscrawl".Equals(Action);
if (isBase64Content)
{
input.FileName = "scrawl.png";
input.FileBytes = Convert.FromBase64String(Context.Request.Form[UEditorConfig.ScrawlFieldName]);
if (input.FileBytes.Length > UEditorConfig.ScrawlMaxSize)
{
throw new UEditorServiceException($"文件大小超出限制");
}
format = UEditorConfig.ScrawlPathFormat;
urlPrefix = UEditorConfig.ScrawlUrlPrefix;
}
else
{
//取得公共参数
switch (Action)
{
case "uploadimage":
uploadFieldName = UEditorConfig.ImageFieldName;
allowExtensionList = UEditorConfig.ImageAllowFiles;
allowSize = UEditorConfig.ImageMaxSize;
format = UEditorConfig.ImagePathFormat;
urlPrefix = UEditorConfig.ImageUrlPrefix;
break;
case "uploadvideo":
uploadFieldName = UEditorConfig.VideoFieldName;
allowExtensionList = UEditorConfig.VideoAllowFiles;
allowSize = UEditorConfig.VideoMaxSize;
format = UEditorConfig.VideoPathFormat;
urlPrefix = UEditorConfig.VideoUrlPrefix;
break;
case "uploadfile":
uploadFieldName = UEditorConfig.FileFieldName;
allowExtensionList = UEditorConfig.FileAllowFiles;
allowSize = UEditorConfig.FileMaxSize;
format = UEditorConfig.FilePathFormat;
urlPrefix = UEditorConfig.FileUrlPrefix;
break;
}
var file = Context.Request.Form.Files[uploadFieldName];
input.OriginalFileName = file.FileName;
input.FileName = file.FileName;
if (!allowExtensionList.Select(p => p.ToLower()).Contains(Path.GetExtension(file.FileName)))
{
throw new UEditorServiceException($"文件格式被禁止上传");
}
if (file.Length > allowSize)
{
throw new UEditorServiceException($"文件大小超出限制");
}
try
{
var fileBytes = new byte[file.Length];
await file.OpenReadStream().ReadAsync(fileBytes, 0, fileBytes.Length);
input.FileBytes = fileBytes;
}
catch (Exception ex)
{
throw new UEditorServiceException($"网络错误", ex.Message);
}
}
input.UrlPrefix = urlPrefix;
input.FileName = UEditorPathFormat(input.FileName, format);
//处理上传路径，移除路径前的“/”以免造成后续路径拼接出错
if (input.UrlPrefix.StartsWith("/"))
{
input.UrlPrefix = input.UrlPrefix.Substring(1, input.UrlPrefix.Length - 1);
}
//在路径结尾添加“/”以免造成后续路径拼接出错
if (input.UrlPrefix.Length > 1 && !input.UrlPrefix.EndsWith("/"))
{
input.UrlPrefix += "/";
}
return(await Task.FromResult(input));
}