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One of Python's features is the pickle function, that allows you to store any arbitrary anything, and restore it exactly to its original form. One common usage is to take a fully instantiated object and pickle it for later use. In my case I have an AMQP Message object that is not serializable and I want to be able to store it in a session store and retrieve it which I can do with pickle. The primary difference is that I need to call a method on the object, I am not just looking for the data.
But this project is in nodejs and it seems like with all of node's low-level libraries there must be some way to save this object, so that it could persist between web calls.
The use case is that a web page picks up a RabbitMQ message and displays the info derived from it. I don't want to acknowledge the message until the message has been acted on. I would just normally just save the data in session state, but that's not an option unless I can somehow save it in its original form.
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An alternative is cPickle. It is nearly identical to pickle , but written in C, which makes it up to 1000 times faster. For small files, however, you won't notice the difference in speed. Both produce the same data streams, which means that Pickle and cPickle can use the same files.
The Python pickle module is another way to serialize and deserialize objects in Python. It differs from the json module in that it serializes objects in a binary format, which means the result is not human readable.
Python pickle module is used for serializing and de-serializing a Python object structure. Any object in Python can be pickled so that it can be saved on disk. What pickle does is that it “serializes” the object first before writing it to file. Pickling is a way to convert a python object (list, dict, etc.)
Cons-1: Pickle is Unsafe Unlike JSON, which is just a piece of string, it is possible to construct malicious pickle data which will execute arbitrary code during unpickling . Therefore, we should NEVER unpickle data that could have come from an untrusted source, or that could have been tampered with.
See the pickle-js project: https://code.google.com/p/pickle-js/
Also, from findbestopensource.com:
pickle.js is a JavaScript implementation of the Python pickle format. It supports pickles containing a cross-language subset of the primitive types. Key differences between pickle.js and pickle.py:text pickles only some types are lossily converted (e.g. int) some types are not supported (e.g. class)
More information available here: http://www.findbestopensource.com/product/pickle-js
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