zms._blobfields.MyBlob

class documentation

class MyBlob(object): (source)

Known subclasses: zms._blobfields.MyFile, zms._blobfields.MyImage

Base class for binary large objects (blobs) stored in ZMS.

MyBlob provides the core functionality for managing files and images in ZMS, including HTTP request handling, caching, range requests, and MediaDB integration.

Features:

HTTP request/response handling via __call__() method
Visibility and access permission checks
HTTP caching headers (Last-Modified, If-Modified-Since, ETags)
HTTP Range requests for partial content delivery
Content-Type and Content-Disposition header management
MediaDB file storage and retrieval with ZODB fallback
Data serialization to XML format
File copying and cloning support

This is an abstract base class; use MyImage for images or MyFile for files.

Method	`__bobo_traverse__`	Undocumented
Method	`__call__`	Handle HTTP request for blob object (file/image).
Method	`__str__`	Undocumented
Method	`equals`	Indicates whether some other MyBlob-object is "equal to" this one.
Method	`get_real_size`	Returns real size in ZODB.
Method	`getContentType`	Returns MIME-type (e.g. image/gif, text/xml).
Method	`getData`	Returns data.
Method	`getDataSizeStr`	Returns display string for file-size (kB). Deprecated: Use standard.getDataSizeStr(len) instead!
Method	`getDataURI`	Undocumented
Method	`getFilename`	Returns filename.
Method	`getHref`	Returns absolute url.
Method	`getMediadbfile`	Returns mediadb-filename.
Method	`getMimeTypeIconSrc`	Returns the absolute-url of an icon representing the MIME-type of this MyBlob-object. Deprecated: Use zmscontext.getMimeTypeIconSrc(mt) instead!
Method	`getObjAttrs`	Undocumented
Method	`on_setobjattr`	Undocumented
Class Variable	`__call____roles__`	Undocumented
Class Variable	`__class_name__`	Undocumented
Class Variable	`__roles__`	Undocumented
Class Variable	`__version__`	Undocumented
Class Variable	`get_real_size__roles__`	Undocumented
Class Variable	`get_size__roles__`	MyBlob.get_real_size:
Class Variable	`getContentType__roles__`	Undocumented
Class Variable	`getData__roles__`	Undocumented
Class Variable	`getDataSizeStr__roles__`	Undocumented
Class Variable	`getDataURI__roles__`	Undocumented
Class Variable	`getFilename__roles__`	Undocumented
Class Variable	`getHref__roles__`	Undocumented
Class Variable	`getMediadbfile__roles__`	Undocumented
Class Variable	`getMimeTypeIconSrc__roles__`	Undocumented
Class Variable	`getObjAttrs__roles__`	Undocumented
Class Variable	`index_html`	MyBlob.getObjAttrs:
Instance Variable	`aq_parent`	Undocumented
Instance Variable	`data`	Undocumented
Instance Variable	`filename`	Undocumented
Instance Variable	`mediadbfile`	Undocumented
Method	`_createCopy`	Undocumented
Method	`_if_modified_since_request_handler`	Undocumented
Method	`_range_request_handler`	Undocumented

def __bobo_traverse__(self, TraversalRequest, name): (source) ¶

Undocumented

def __call__(self, REQUEST=None, **kw): (source) ¶

Handle HTTP request for blob object (file/image).

This method processes requests for blob objects, handling:

Visibility and access permission checks
HTTP caching headers (Last-Modified, If-Modified-Since, ETags)
Range requests for partial content delivery
Content-Type and Content-Disposition headers
MediaDB file retrieval or ZODB data fallback

Parameters
REQUEST:ZPublisher.HTTPRequest or None	The HTTP request object containing headers and parameters
**kw	Additional keyword arguments
Returns
`bytes` or `str` or `MyBlob`	Blob data as bytes or empty string, or self if not an HTTP request