Project: w3lib

Language python
OSS-Fuzz project link
Project repository link
Build status: Fuzzers succeeding: Build log
Build status: Code coverage succeeding: Build log
Build status: Fuzz Introspector succeeding: Build log
Fuzzer count 3
Lines of code 322
Lines covered 171
Code coverage 53.11%
Code coverage report Report link
Static reachability 12.71%
Fuzz Introspector report Report link (from 2025-08-28)

Historical Progression

Functions of interest to fuzz

This section outlines functions that may be of interest to fuzz. They are based on ranking functions that have a lot of complexity but currently exhibit low code coverage. The complexity is calculated based on the function itself as well as the functions called by the given function, i.e. the tree of code that the function triggers.


This is only a minor amount of introspection information available for this project. Please consult the Fuzz Introspector report for more information, e.g. the introspection table of all functions in the target project available here.

Function name Function source file Accumulated cyclomatic complexity Code coverage
...fuzz_parse_data_uri.TestOneInput ...fuzz_parse_data_uri 121 0.0%
w3lib.html.get_meta_refresh w3lib.html 103 0.0%
w3lib.url.canonicalize_url w3lib.url 102 0.0%
...fuzz_safe_download_url.TestOneInput ...fuzz_safe_download_url 89 0.0%
w3lib.html.get_base_url w3lib.html 79 0.0%
w3lib.encoding.html_to_unicode w3lib.encoding 75 0.0%
...fuzz_url_safe.TestOneInput ...fuzz_url_safe 73 0.0%
w3lib.encoding.html_body_declared_encoding w3lib.encoding 47 0.0%
w3lib.url.add_or_replace_parameter w3lib.url 34 0.0%
w3lib.url.add_or_replace_parameters w3lib.url 34 0.0%