django/django

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django/middleware/csrf.py

Summary

Maintainability
D
1 day
Test Coverage

Function process_view has a Cognitive Complexity of 48 (exceeds 5 allowed). Consider refactoring.
Open

    def process_view(self, request, callback, callback_args, callback_kwargs):
        if getattr(request, 'csrf_processing_done', False):
            return None

        # Wait until request.META["CSRF_COOKIE"] has been manipulated before
Severity: Minor
Found in django/middleware/csrf.py - About 7 hrs to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function _get_token has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
Open

    def _get_token(self, request):
        if settings.CSRF_USE_SESSIONS:
            try:
                return request.session.get(CSRF_SESSION_KEY)
            except AttributeError:
Severity: Minor
Found in django/middleware/csrf.py - About 45 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Avoid too many return statements within this function.
Open

                return self._reject(request, REASON_BAD_TOKEN)
Severity: Major
Found in django/middleware/csrf.py - About 30 mins to fix

    Avoid too many return statements within this function.
    Open

                        return self._reject(request, REASON_MALFORMED_REFERER)
    Severity: Major
    Found in django/middleware/csrf.py - About 30 mins to fix

      Avoid too many return statements within this function.
      Open

                          return self._reject(request, REASON_INSECURE_REFERER)
      Severity: Major
      Found in django/middleware/csrf.py - About 30 mins to fix

        Avoid too many return statements within this function.
        Open

                            return self._reject(request, reason)
        Severity: Major
        Found in django/middleware/csrf.py - About 30 mins to fix

          Avoid too many return statements within this function.
          Open

                          return self._reject(request, REASON_NO_CSRF_COOKIE)
          Severity: Major
          Found in django/middleware/csrf.py - About 30 mins to fix

            Avoid too many return statements within this function.
            Open

                    return self._accept(request)
            Severity: Major
            Found in django/middleware/csrf.py - About 30 mins to fix

              Similar blocks of code found in 2 locations. Consider refactoring.
              Open

                  pairs = zip((chars.index(x) for x in secret), (chars.index(x) for x in mask))
              Severity: Major
              Found in django/middleware/csrf.py and 1 other location - About 1 hr to fix
              django/middleware/csrf.py on lines 66..66

              Duplicated Code

              Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

              Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

              When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

              Tuning

              This issue has a mass of 38.

              We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

              The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

              If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

              See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

              Refactorings

              Further Reading

              Similar blocks of code found in 2 locations. Consider refactoring.
              Open

                  pairs = zip((chars.index(x) for x in token), (chars.index(x) for x in mask))
              Severity: Major
              Found in django/middleware/csrf.py and 1 other location - About 1 hr to fix
              django/middleware/csrf.py on lines 52..52

              Duplicated Code

              Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

              Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

              When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

              Tuning

              This issue has a mass of 38.

              We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

              The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

              If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

              See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

              Refactorings

              Further Reading

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