/// <summary>
/// 是否允许购买（包含已经下载过、或者不需要购买）
/// </summary>
/// <param name="attachment"></param>
/// <returns></returns>
public bool Attachment_Buy(Attachment attachment)
{
if (Attachment_Download(attachment))
return true;
if (UserContext.CurrentUser != null && attachment.Price <= UserContext.CurrentUser.TradePoints)
return true;
return false;
}
/// <summary>
/// 是否具有删除附件的权限
/// </summary>
/// <returns></returns>
public bool Attachment_Delete(Attachment attachment)
{
IUser currentUser = UserContext.CurrentUser;
if (currentUser == null)
return false;
TenantType tenantType = tenantTypeService.Get(attachment.TenantTypeId);
if (tenantType == null)
return false;
if (IsAdministrator(tenantType.ApplicationId))
return true;
if (AuthorizationService.IsOwner(currentUser, attachment.UserId))
return true;
if (AuthorizationService.IsTenantManager(currentUser, attachment.TenantTypeId, attachment.OwnerId))
return true;
return false;
}
public static bool BarAttachement_Download(this IUser currentUser, Attachment attachment)
{
if (DIContainer.Resolve<Authorizer>().Attachment_Edit(attachment))
return true;
//处理仅允许注册用户下载
//if (thread.OnlyAllowRegisteredUserDownload && currentUser == null)
// return false;
//处理售价
if (attachment.Price <= 0)
return true;
AttachmentDownloadService attachementDownloadService = new AttachmentDownloadService();
if (currentUser != null && attachementDownloadService.IsDownloaded(currentUser.UserId, attachment.AttachmentId))
return true;
if (currentUser != null && attachment.Price < currentUser.TradePoints)
return true;
return false;
}
/// <summary>
/// 下载远程图片
/// </summary>
/// <param name="imageUrl">将要下载的图片地址</param>
/// <param name="microblogId">微博Id</param>
private void DownloadRemoteImage(string imageUrl, long microblogId)
{
if (UserContext.CurrentUser == null || microblogId <= 0 || string.IsNullOrEmpty(imageUrl))
return;
try
{
WebRequest webRequest = WebRequest.Create(SiteUrls.FullUrl(imageUrl));
HttpWebResponse httpWebResponse = (HttpWebResponse)webRequest.GetResponse();
Stream stream = httpWebResponse.GetResponseStream();
MemoryStream ms = new MemoryStream();
stream.CopyTo(ms);
string friendlyFileName = imageUrl.Substring(imageUrl.LastIndexOf("/") + 1);
string contentType = MimeTypeConfiguration.GetMimeType(friendlyFileName);
bool isImage = contentType.StartsWith("image");
if (!isImage || stream == null || !stream.CanRead)
return;
Attachment attachment = new Attachment(ms, contentType, friendlyFileName);
attachment.FileLength = httpWebResponse.ContentLength;
attachment.AssociateId = microblogId;
attachment.UserId = UserContext.CurrentUser.UserId;
attachment.UserDisplayName = UserContext.CurrentUser.DisplayName;
attachment.TenantTypeId = TenantTypeIds.Instance().Microblog();
var attachmentService = new AttachmentService(TenantTypeIds.Instance().Microblog());
attachmentService.Create(attachment, ms);
ms.Dispose();
ms.Close();
}
catch { }
}
/// <summary>
/// 添加BBTag实体
/// </summary>
/// <param name="htmlTemplate">html模板</param>
/// <param name="attachment">带替换附件</param>
/// <returns></returns>
private BBTag AddBBTag(string htmlTemplate, Attachment attachment)
{
BBAttribute bbAttribute = new BBAttribute("attachTemplate", "",
n =>
{
return string.Format(htmlTemplate,
attachment.FriendlyFileName,
attachment.FriendlyFileLength,
attachment.DownloadCount,
SiteUrls.Instance().AttachmentUrl(attachment.AttachmentId,TenantTypeIds.Instance().ContentItem()));
},
HtmlEncodingMode.UnsafeDontEncode);
return new BBTag("attach:" + attachment.AttachmentId, "${attachTemplate}", "", false, BBTagClosingStyle.LeafElementWithoutContent, null, bbAttribute);
}
/// <summary>
/// 添加BBTag实体
/// </summary>
/// <param name="htmlTemplate">html模板</param>
/// <param name="attachment">带替换附件</param>
/// <returns>BBTag实体</returns>
private BBTag AddBBTag(string htmlTemplate, Attachment attachment)
{
PointCategory pointCategory = new PointService().GetPointCategory(PointCategoryKeys.Instance().TradePoints());
string categoryName = pointCategory != null ? pointCategory.CategoryName : "金币";
BBAttribute bbAttribute = new BBAttribute("attachTemplate", "",
n =>
{
return string.Format(htmlTemplate,
attachment.FriendlyFileName,
attachment.FriendlyFileLength,
attachment.Price > 0 ? "，<em>需要" + attachment.Price + categoryName + "</em>" : "",
attachment.DownloadCount,
attachment.AttachmentId);
},
HtmlEncodingMode.UnsafeDontEncode);
return new BBTag("attach:" + attachment.AttachmentId, "${attachTemplate}", "", false, BBTagClosingStyle.LeafElementWithoutContent, null, bbAttribute);
}
public ActionResult UploadFile(string tenantTypeId, string requestName, long associateId, bool resize = false)
{
IUser user = UserContext.CurrentUser;
if (user == null)
{
return new EmptyResult();
}
AttachmentService<Attachment> attachementService = new AttachmentService<Attachment>(tenantTypeId);
long userId = user.UserId, ownerId = user.UserId;
string userDisplayName = user.DisplayName;
long attachmentId = 0;
if (Request.Files.Count > 0 && !string.IsNullOrEmpty(Request.Files[requestName].FileName))
{
HttpPostedFileBase postFile = Request.Files[requestName];
string fileName = postFile.FileName;
TenantAttachmentSettings tenantAttachmentSettings = TenantAttachmentSettings.GetRegisteredSettings(tenantTypeId);
//图片类型支持：gif,jpg,jpeg,png
string[] picTypes = { ".gif", ".jpg", ".jpeg", ".png" };
if (!tenantAttachmentSettings.ValidateFileExtensions(fileName) && !picTypes.Contains(fileName.Substring(fileName.LastIndexOf('.'))))
{
throw new ExceptionFacade(string.Format("只允许上传后缀名为{0}的文件", tenantAttachmentSettings.AllowedFileExtensions));
}
if (!tenantAttachmentSettings.ValidateFileLength(postFile.ContentLength))
{
throw new ExceptionFacade(string.Format("文件大小不允许超过{0}", tenantAttachmentSettings.MaxAttachmentLength));
}
string contentType = MimeTypeConfiguration.GetMimeType(postFile.FileName);
Attachment attachment = new Attachment(postFile, contentType);
attachment.UserId = userId;
attachment.AssociateId = associateId;
attachment.TenantTypeId = tenantTypeId;
attachment.OwnerId = ownerId;
attachment.UserDisplayName = userDisplayName;
using (Stream stream = postFile.InputStream)
{
attachementService.Create(attachment, stream);
}
attachmentId = attachment.AttachmentId;
}
return Json(new { AttachmentId = attachmentId });
}
/// <summary>
/// 是否拥有下载的权限
/// </summary>
/// <param name="attachment"></param>
/// <returns></returns>
public bool Attachment_Download(Attachment attachment)
{
//处理仅允许注册用户下载
//if (thread.OnlyAllowRegisteredUserDownload && currentUser == null)
// return false;
//处理售价
if (attachment.Price <= 0)
return true;
//if (DIContainer.Resolve<Authorizer>().Attachment_Edit(attachment))
// return true;
IUser currentUser = UserContext.CurrentUser;
if (currentUser == null)
return false;
if (AuthorizationService.IsOwner(currentUser, attachment.UserId))
return true;
AttachmentDownloadService attachementDownloadService = new AttachmentDownloadService();
if (UserContext.CurrentUser != null && attachementDownloadService.IsDownloaded(UserContext.CurrentUser.UserId, attachment.AttachmentId))
return true;
return false;
}
/// <summary>
/// 附件下载的直连地址
/// </summary>
/// <param name="attachment">附件实体</param>
/// <param name="enableClientCaching">是否缓存</param>
/// <returns></returns>
public string AttachmentDirectUrl(Attachment attachment, bool enableClientCaching = true)
{
if (attachment == null)
{
return string.Empty;
}
string attachmentPath = attachment.GetRelativePath() + "/" + attachment.FileName;
if (enableClientCaching)
{
return storeProvider.GetDirectlyUrl(attachmentPath);
}
else
{
return storeProvider.GetDirectlyUrl(attachmentPath, DateTime.Now);
}
}
/// <summary>
/// 获取图片的URL
/// </summary>
/// <param name="attachment">附件</param>
/// <param name="tenantTypeId">租户类型Id</param>
/// <param name="imageSizeTypeKey">尺寸类型（通过ImageSizeTypeKeys类获取)</param>
/// <param name="enableClientCaching">是否使用客户端缓存</param>
/// <returns></returns>
public string ImageUrl(Attachment attachment, string tenantTypeId, string imageSizeTypeKey, bool enableClientCaching = true)
{
if (attachment == null)
{
return WebUtility.ResolveUrl("~/Themes/Shared/Styles/Images/default_img.png");
}
return ImageUrl(attachment.GetRelativePath() + "/" + attachment.FileName, tenantTypeId, imageSizeTypeKey, enableClientCaching);
}
/// <summary>
/// 实例化下载记录对象
/// </summary>
/// <param name="attachment">附件实体（用来为下载记录提供一些信息）</param>
/// <returns></returns>
public static AttachmentDownloadRecord New(Attachment attachment)
{
return new AttachmentDownloadRecord()
{
OwnerId = attachment.OwnerId,
//UserId = attachment.UserId,
//UserDisplayName = attachment.UserDisplayName,
AttachmentId = attachment.AttachmentId,
TenantTypeId = attachment.TenantTypeId,
AssociateId = attachment.AssociateId,
FromUrl = HttpContext.Current != null && HttpContext.Current.Request != null && HttpContext.Current.Request.UrlReferrer!=null
? HttpContext.Current.Request.UrlReferrer.ToString()
: string.Empty,
IP = WebUtility.GetIP(),
Price = attachment.Price,
DownloadDate = DateTime.UtcNow,
LastDownloadDate = DateTime.UtcNow
};
}
