//--- Methods ---
public StreamInfo GetFile(ResourceBE attachment, SizeType size, bool allowFileLink)
{
MimeType mime;
switch (size)
{
case SizeType.THUMB:
case SizeType.WEBVIEW:
mime = AttachmentPreviewBL.ResolvePreviewMime(attachment.MimeType);
break;
default:
mime = attachment.MimeType;
break;
}
return(GetFileInternal(FilePath(attachment, size), mime));
}
internal Yield PutSiteLogo(DreamContext context, DreamMessage request, Result <DreamMessage> response)
{
//Confirm image type
if (!new MimeType("image/*").Match(request.ContentType))
{
throw new SiteImageMimetypeInvalidArgumentException();
}
try {
//Save file to storage provider
DekiContext.Current.Instance.Storage.PutSiteFile(LOGO_LABEL, new StreamInfo(request.AsStream(), request.ContentLength, request.ContentType));
ConfigBL.SetInstanceSettingsValue(ConfigBL.UI_LOGO_UPLOADED, "true");
} catch (Exception x) {
DekiContext.Current.Instance.Log.Warn("Failed to save logo to storage provider", x);
ConfigBL.DeleteInstanceSettingsValue(ConfigBL.UI_LOGO_UPLOADED);
throw;
}
StreamInfo file = DekiContext.Current.Instance.Storage.GetSiteFile(LOGO_LABEL, false);
if (file != null)
{
StreamInfo thumb = AttachmentPreviewBL.BuildThumb(file, FormatType.PNG, RatioType.UNDEFINED, DekiContext.Current.Instance.LogoWidth, DekiContext.Current.Instance.LogoHeight);
if (thumb != null)
{
DekiContext.Current.Instance.Storage.PutSiteFile(LOGO_LABEL, thumb);
}
else
{
DekiContext.Current.Instance.Log.WarnMethodCall("PUT:site/logo", "Unable to process logo through imagemagick");
DekiContext.Current.ApiPlug.At("site", "logo").Delete();
throw new SiteUnableToProcessLogoInvalidOperationException();
}
}
else
{
DekiContext.Current.Instance.Log.WarnMethodCall("PUT:site/logo", "Unable to retrieve saved logo");
}
response.Return(DreamMessage.Ok());
yield break;
}
public Yield GetFile(DreamContext context, DreamMessage request, Result <DreamMessage> response)
{
PageBE parentPage = null;
DreamMessage responseMsg = null;
ResourceBE fileRevision = GetAttachment(context, request, Permissions.READ, true, false, out parentPage);
if (fileRevision.IsHidden)
{
PermissionsBL.CheckUserAllowed(DekiContext.Current.User, Permissions.ADMIN);
}
// check if only file information is requested
if (context.Verb == Verb.HEAD)
{
response.Return(new DreamMessage(DreamStatus.Ok, null, fileRevision.MimeType, (long)fileRevision.Size, Stream.Null));
yield break;
}
try {
if (request.CheckCacheRevalidation(fileRevision.Timestamp))
{
responseMsg = DreamMessage.NotModified();
}
if (responseMsg == null)
{
#region Preview related parameter parsing
string sFormat = context.GetParam("format", string.Empty);
string sRatio = context.GetParam("ratio", string.Empty);
uint height = context.GetParam <uint>("height", 0);
uint width = context.GetParam <uint>("width", 0);
string cachedSize = context.GetParam("size", string.Empty);
// check 'ratio' parameter
RatioType ratio = RatioType.UNDEFINED;
if (!string.IsNullOrEmpty(sRatio))
{
switch (sRatio.ToLowerInvariant().Trim())
{
case "var":
case "variable":
ratio = RatioType.VARIABLE;
break;
case "fixed":
ratio = RatioType.FIXED;
break;
default:
throw new AttachmentFileRatioInvalidArgumentException();
}
}
// check 'size' parameter
SizeType size = SizeType.UNDEFINED;
if (!string.IsNullOrEmpty(cachedSize) && !SysUtil.TryParseEnum(cachedSize.Trim(), out size))
{
throw new AttachmentFilesizeInvalidArgumentException();
}
// check 'format' parameter
FormatType format = FormatType.UNDEFINED;
if (!string.IsNullOrEmpty(sFormat) && !SysUtil.TryParseEnum(sFormat.Trim(), out format))
{
throw new AttachmentFileFormatInvalidArgumentException();
}
#endregion
//if any preview related parameters are set, do preview logic. Otherwise return the file
StreamInfo file = null;
if ((size != SizeType.UNDEFINED && size != SizeType.ORIGINAL) ||
ratio != RatioType.UNDEFINED ||
format != FormatType.UNDEFINED ||
height != 0 ||
width != 0
)
{
file = AttachmentPreviewBL.RetrievePreview(fileRevision, height, width, ratio, size, format);
}
else
{
var isMSWebDAV = MSWEBDAV_USER_AGENT_REGEX.IsMatch(request.Headers.UserAgent ?? string.Empty);
file = DekiContext.Current.Instance.Storage.GetFile(fileRevision, SizeType.ORIGINAL, !isMSWebDAV);
}
// prepare response
if (file == null)
{
throw new AttachmentDoesNotExistFatalException(fileRevision.ResourceId, fileRevision.Revision);
}
if (file.Uri != null)
{
responseMsg = DreamMessage.Redirect(file.Uri);
}
else
{
bool inline = fileRevision.MetaXml.ImageHeight.HasValue;
// see if we can use the MimeType map for allowing inlining
if (!inline)
{
// if IE inline security is not disabled
bool isIE = false;
if (!DekiContext.Current.Instance.EnableUnsafeIEContentInlining)
{
// check the user agent to see if we're dealing with IE
isIE = MSIE_USER_AGENT_REGEX.IsMatch(request.Headers.UserAgent ?? string.Empty);
}
// see if the mime-type could allow inlining
inline = DekiContext.Current.Instance.MimeTypeCanBeInlined(fileRevision.MimeType);
if (inline && isIE)
{
// check whether the creator of the file had unsafecontent permission, to override IE security
IList <ResourceBE> revisions = ResourceBL.Instance.GetResourceRevisions(fileRevision.ResourceId, ResourceBE.ChangeOperations.CONTENT, SortDirection.DESC, 1);
UserBE lastContentEditor = UserBL.GetUserById(revisions[0].UserId);
inline = PermissionsBL.IsUserAllowed(lastContentEditor, parentPage, Permissions.UNSAFECONTENT);
}
}
responseMsg = DreamMessage.Ok(fileRevision.MimeType, file.Length, file.Stream);
responseMsg.Headers["X-Content-Type-Options"] = "nosniff";
responseMsg.Headers.ContentDisposition = new ContentDisposition(inline, fileRevision.Timestamp, null, null, fileRevision.Name, file.Length, request.Headers.UserAgent);
// MSIE6 will delete a downloaded file before the helper app trying to use it can get to it so we
//have to do custom cache control headers for MSIE6 so that the file can actually be opened
if (MSIE6_USER_AGENT_REGEX.IsMatch(request.Headers.UserAgent ?? string.Empty))
{
responseMsg.Headers["Expires"] = "0";
responseMsg.Headers.Pragma = "cache";
responseMsg.Headers.CacheControl = "private";
}
else
{
responseMsg.SetCacheMustRevalidate(fileRevision.Timestamp);
}
}
}
} catch {
if (responseMsg != null)
{
responseMsg.Close();
}
throw;
}
response.Return(responseMsg);
yield break;
}
