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The SCANOSS Scanner is a simple Python script performs a scan of a folder using SCANOSS API.
Run scanner.py as a python script, passing as argument the path to the folder to be scanned.
Example:
python3 scanner.py /path/to/dir/to/scan
scanner.py generates a WFP file that is saved as scan_wfp in the current folder. This file is uploaded to the SCANOSS API, to perform a scan and return the output as in json format.
SCANOSS implements an adaptation of the original winnowing algorithm by S. Schleimer, D. S. Wilkerson and A. Aiken as described in their seminal article which can be found here: https://theory.stanford.edu/~aiken/publications/papers/sigmod03.pdf
The winnowing algorithm is configured using two parameters, the gram size and the window size. For SCANOSS the values need to be:
The result of performing the Winnowing algorithm is a string called WFP (Winnowing FingerPrint). A WFP contains optionally the name of the source component and the results of the Winnowing algorithm for each file.
EXAMPLE output: test-component.wfp
component=f9fc398cec3f9dd52aa76ce5b13e5f75,test-component.zip
file=cae3ae667a54d731ca934e2867b32aaa,948,test/test-file1.c
4=579be9fb
5=9d9eefda,58533be6,6bb11697
6=80188a22,f9bb9220
10=750988e0,b6785a0d
12=600c7ec9
13=595544cc
18=e3cb3b0f
19=e8f7133d
file=cae3ae667a54d731ca934e2867b32aaa,1843,test/test-file2.c
2=58fb3eed
3=f5f7f458
4=aba6add1
8=53762a72,0d274008,6be2454a
10=239c7dfa
12=0b2188c9
15=bd9c4b10,d5c8f9fb
16=eb7309dd,63aebec5
19=316e10eb
[...]
Here, component is the MD5 hash and path of the component (It could be a path to a compressed file or a URL). file is the MD5 hash, file length and file path being fingerprinted, followed by a list of WFP fingerprints with their corresponding line numbers.
Python 3.5 or higher.
The dependencies can be found in the requirements.txt file. To install dependencies:
pip3 install -r requirements.txt
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