private Zongsoft.IO.FileInfo GenerateInfo(string path, IDictionary <string, object> properties)
{
if (properties == null)
{
return(null);
}
DateTimeOffset createdTimeOffset, modifiedTimeOffset;
DateTime? createdTime = null, modifiedTime = null;
int size = 0;
byte[] checksum = null;
object value;
if (properties.TryGetValue(StorageHeaders.ZFS_CREATEDTIME_PROPERTY, out value))
{
if (Zongsoft.Common.Convert.TryConvertValue(value, out createdTimeOffset))
{
createdTime = createdTimeOffset.LocalDateTime;
}
}
if (properties.TryGetValue(StorageHeaders.HTTP_LAST_MODIFIED_PROPERTY, out value))
{
if (Zongsoft.Common.Convert.TryConvertValue(value, out modifiedTimeOffset))
{
modifiedTime = modifiedTimeOffset.LocalDateTime;
}
}
if (properties.TryGetValue(StorageHeaders.HTTP_CONTENT_LENGTH_PROPERTY, out value))
{
Zongsoft.Common.Convert.TryConvertValue(value, out size);
}
if (properties.TryGetValue(StorageHeaders.HTTP_ETAG_PROPERTY, out value) && value != null)
{
checksum = Zongsoft.Common.Convert.FromHexString(value.ToString().Trim('"'), '-');
}
var info = new Zongsoft.IO.FileInfo(path, size, checksum, createdTime, modifiedTime, _fileSystem.GetUrl(path));
foreach (var property in properties)
{
info.Properties[property.Key] = property.Value;
}
return(info);
}
public override Stream GetStream(HttpContent parent, HttpContentHeaders headers)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (headers == null)
{
throw new ArgumentNullException(nameof(headers));
}
//判断当前内容项是否为普通表单域，如果是则返回一个内存流
if (headers.ContentDisposition == null || string.IsNullOrEmpty(headers.ContentDisposition.FileName))
{
//在表单数据标记列表中按顺序将当前内容标记为普通表单域
_isFormData.Add(true);
//返回一个新的内存流
return(new MemoryStream());
}
//获取当前内容项的内容类型
var contentType = headers.ContentType == null ? string.Empty : headers.ContentType.MediaType;
if (string.IsNullOrWhiteSpace(contentType))
{
contentType = System.Web.MimeMapping.GetMimeMapping(headers.ContentDisposition.FileName);
}
string fileName = null;
//设置文件名的初始值
if (_filePath[_filePath.Length - 1] != '/')
{
var index = _filePath.LastIndexOf('/');
if (index > 0 && index < _filePath.Length - 1)
{
fileName = _filePath.Substring(index + 1);
}
}
var dispositionName = UnquoteToken(headers.ContentDisposition.Name);
var extensionName = System.IO.Path.GetExtension(UnquoteToken(headers.ContentDisposition.FileName));
if (!string.IsNullOrWhiteSpace(dispositionName))
{
//获取请求头中显式指定的文件名（注意：该文件名支持模板格式）
if (_headers.TryGetValue(dispositionName + ".name", out var value))
{
fileName = Zongsoft.Text.TemplateEvaluatorManager.Default.Evaluate <string>(value, null).ToLowerInvariant() + extensionName;
}
}
//定义文件写入的模式
bool overwrite = false;
//定义文件的扩展名是否自动添加
bool extensionAppend = true;
//执行写入前的回调方法
if (_onWriting != null)
{
//创建回调参数
var args = new WritingEventArgs(_filePath, fileName, Interlocked.Increment(ref _index));
//执行写入前的回调
_onWriting(args);
if (args.Cancel)
{
return(null);
}
//获取文件写入参数
fileName = args.FileName;
overwrite = args.Overwrite;
extensionAppend = args.ExtensionAppend;
}
//如果文件名为空，则生成一个以“时间戳-随机数.ext”的默认文件名
if (string.IsNullOrWhiteSpace(fileName))
{
fileName = string.Format("X{0}-{1}{2}", ((long)(DateTime.UtcNow - EPOCH).TotalSeconds).ToString(), Zongsoft.Common.Randomizer.GenerateString(), extensionAppend ? extensionName : string.Empty);
}
else if (extensionAppend && !fileName.EndsWith(extensionName))
{
fileName += extensionName;
}
//生成文件的完整路径
var filePath = Zongsoft.IO.Path.Combine(_directory, fileName);
//生成文件信息的描述实体
var fileInfo = new Zongsoft.IO.FileInfo(filePath, (headers.ContentDisposition.Size.HasValue ? headers.ContentDisposition.Size.Value : -1), DateTime.Now, null, FileSystem.GetUrl(filePath))
{
Type = contentType,
};
//将上传的文件项的键名加入到文件描述实体的扩展属性中
if (!string.IsNullOrWhiteSpace(dispositionName))
{
fileInfo.Properties.Add(EXTENDED_PROPERTY_DISPOSITIONNAME, dispositionName);
}
//将上传的原始文件名加入到文件描述实体的扩展属性中
fileInfo.Properties.Add(EXTENDED_PROPERTY_FILENAME, Uri.UnescapeDataString(UnquoteToken(headers.ContentDisposition.FileName)));
if (_headers != null && _headers.Count > 0 && !string.IsNullOrWhiteSpace(dispositionName))
{
//从全局头里面查找当前上传文件的自定义属性
foreach (var header in _headers)
{
if (header.Key.Length > dispositionName.Length + 1 && header.Key.StartsWith(dispositionName + "-", StringComparison.OrdinalIgnoreCase))
{
fileInfo.Properties.Add(header.Key.Substring(dispositionName.Length + 1), header.Value);
}
}
}
//将文件信息对象加入到集合中
_fileData.Add(fileInfo);
//在表单数据标记列表中按顺序将当前内容标记为非普通表单域（即二进制文件域）
_isFormData.Add(false);
try
{
//调用文件系统根据完整文件路径去创建一个新建文件流
var stream = FileSystem.File.Open(filePath, (overwrite ? FileMode.Create : FileMode.CreateNew), FileAccess.Write, (fileInfo.HasProperties ? fileInfo.Properties : null));
fileInfo.Properties.Add(EXTENDED_PROPERTY_FILESTREAM, stream);
return(stream);
}
catch
{
if (fileInfo != null)
{
_fileData.Remove(fileInfo);
}
throw;
}
}
private Zongsoft.IO.FileInfo GenerateInfo(string path, IDictionary<string, string> properties)
{
if(properties == null)
return null;
DateTimeOffset createdTimeOffset, modifiedTimeOffset;
DateTime? createdTime = null, modifiedTime = null;
int size = 0;
byte[] checksum = null;
string text;
if(properties.TryGetValue(StorageHeaders.ZFS_CREATEDTIME_PROPERTY, out text))
{
if(Zongsoft.Common.Convert.TryConvertValue(text, out createdTimeOffset))
createdTime = createdTimeOffset.LocalDateTime;
}
if(properties.TryGetValue(StorageHeaders.HTTP_LAST_MODIFIED_PROPERTY, out text))
{
if(Zongsoft.Common.Convert.TryConvertValue(text, out modifiedTimeOffset))
modifiedTime = modifiedTimeOffset.LocalDateTime;
}
if(properties.TryGetValue(StorageHeaders.HTTP_CONTENT_LENGTH_PROPERTY, out text))
Zongsoft.Common.Convert.TryConvertValue(text, out size);
if(properties.TryGetValue(StorageHeaders.HTTP_ETAG_PROPERTY, out text))
checksum = Zongsoft.Common.Convert.FromHexString(text.Trim('"'), '-');
var info = new Zongsoft.IO.FileInfo(path, size, checksum, createdTime, modifiedTime, _fileSystem.GetUrl(path));
foreach(var property in properties)
{
info.Properties[property.Key] = property.Value;
}
return info;
}
public override Stream GetStream(HttpContent parent, HttpContentHeaders headers)
{
if(parent == null)
throw new ArgumentNullException("parent");
if(headers == null)
throw new ArgumentNullException("headers");
if(headers.ContentDisposition == null || string.IsNullOrEmpty(headers.ContentDisposition.FileName))
{
_isFormData.Add(true);
return new MemoryStream();
}
var contentType = headers.ContentType == null ? string.Empty : headers.ContentType.MediaType;
if(string.IsNullOrWhiteSpace(contentType))
contentType = System.Web.MimeMapping.GetMimeMapping(headers.ContentDisposition.FileName);
_isFormData.Add(false);
string fileName = null;
var dispositionName = this.UnquoteToken(headers.ContentDisposition.Name);
if(!string.IsNullOrWhiteSpace(dispositionName))
{
if(_headers.TryGetValue(dispositionName + ".name", out fileName))
fileName = Zongsoft.Text.TemplateEvaluatorManager.Default.Evaluate<string>(fileName, null).ToLowerInvariant() + System.IO.Path.GetExtension(headers.ContentDisposition.FileName.Trim('"'));
}
if(string.IsNullOrWhiteSpace(fileName))
fileName = string.Format("{0:yyyyMMdd-HHmmss}-{1}{2}", DateTime.Now, (uint)Zongsoft.Common.RandomGenerator.GenerateInt32(), System.IO.Path.GetExtension(headers.ContentDisposition.FileName.Trim('"')));
var filePath = Zongsoft.IO.Path.Combine(_directoryPath, fileName);
Zongsoft.IO.FileInfo fileInfo = new Zongsoft.IO.FileInfo(filePath, (headers.ContentDisposition.Size.HasValue ? headers.ContentDisposition.Size.Value : -1), DateTime.Now, null, FileSystem.GetUrl(filePath));
fileInfo.Properties.Add("FileName", Uri.UnescapeDataString(headers.ContentDisposition.FileName.Trim('"')));
if(_headers != null && _headers.Count > 0 && !string.IsNullOrWhiteSpace(dispositionName))
{
//从全局头里面查找当前上传文件的自定义属性
foreach(var header in _headers)
{
if(header.Key.Length > dispositionName.Length + 1 && header.Key.StartsWith(dispositionName + "-", StringComparison.OrdinalIgnoreCase))
fileInfo.Properties.Add(header.Key.Substring(dispositionName.Length + 1), header.Value);
}
}
var infoKey = string.IsNullOrWhiteSpace(dispositionName) ? fileName : dispositionName;
//将文件信息对象加入到集合中
_fileData.Add(infoKey, fileInfo);
try
{
return FileSystem.File.Open(filePath, FileMode.CreateNew, FileAccess.Write, (fileInfo.HasProperties ? fileInfo.Properties : null));
}
catch
{
if(fileInfo != null)
_fileData.Remove(infoKey);
throw;
}
}