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f46c2448b1
hypothesis `average_size` argument was already deprecated [1], and was effectively removed in hypothesis 4 [2]. [1] https://github.com/HypothesisWorks/hypothesis/pull/1162 [2] https://hypothesis.readthedocs.io/en/latest/changes.html#v4-0-0
127 lines
3.4 KiB
Python
127 lines
3.4 KiB
Python
import string
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from urllib import parse
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from hypothesis import strategies
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HTTP_METHODS = ["OPTIONS", "GET", "HEAD", "POST", "PUT", "DELETE", "TRACE", "CONNECT"]
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# Unicode characters of the "Letter" category
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letters = strategies.characters(
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whitelist_categories=("Lu", "Ll", "Lt", "Lm", "Lo", "Nl")
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)
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def http_method():
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return strategies.sampled_from(HTTP_METHODS)
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def _http_path_portion():
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alphabet = string.ascii_letters + string.digits + "-._~"
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return strategies.text(min_size=1, max_size=128, alphabet=alphabet)
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def http_path():
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"""
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Returns a URL path (not encoded).
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"""
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return strategies.lists(_http_path_portion(), min_size=0, max_size=10).map(
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lambda s: "/" + "/".join(s)
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)
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def http_body():
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"""
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Returns random binary body data.
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"""
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return strategies.binary(min_size=0, max_size=1500)
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def valid_bidi(value):
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"""
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Rejects strings which nonsensical Unicode text direction flags.
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Relying on random Unicode characters means that some combinations don't make sense, from a
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direction of text point of view. This little helper just rejects those.
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"""
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try:
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value.encode("idna")
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except UnicodeError:
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return False
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else:
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return True
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def _domain_label():
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return strategies.text(alphabet=letters, min_size=1, max_size=63).filter(valid_bidi)
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def international_domain_name():
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"""
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Returns a byte string of a domain name, IDNA-encoded.
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"""
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return strategies.lists(_domain_label(), min_size=2).map(
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lambda s: (".".join(s)).encode("idna")
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)
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def _query_param():
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return strategies.text(alphabet=letters, min_size=1, max_size=255).map(
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lambda s: s.encode("utf8")
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)
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def query_params():
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"""
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Returns a list of two-tuples byte strings, ready for encoding with urlencode.
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We're aiming for a total length of a URL below 2083 characters, so this strategy
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ensures that the total urlencoded query string is not longer than 1500 characters.
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"""
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return strategies.lists(
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strategies.tuples(_query_param(), _query_param()), min_size=0
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).filter(lambda x: len(parse.urlencode(x)) < 1500)
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def header_name():
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"""
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Strategy returning something that looks like a HTTP header field
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https://en.wikipedia.org/wiki/List_of_HTTP_header_fields suggests they are between 4
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and 20 characters long
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"""
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return strategies.text(
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alphabet=string.ascii_letters + string.digits + "-", min_size=1, max_size=30
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).map(lambda s: s.encode("utf-8"))
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def header_value():
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"""
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Strategy returning something that looks like a HTTP header value
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"For example, the Apache 2.3 server by default limits the size of each field to 8190 bytes"
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https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
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"""
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return (
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strategies.text(
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alphabet=string.ascii_letters
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+ string.digits
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+ string.punctuation.replace(",", "")
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+ " /t",
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min_size=1,
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max_size=8190,
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)
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.map(lambda s: s.encode("utf-8"))
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.filter(lambda s: len(s) < 8190)
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)
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def headers():
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"""
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Strategy returning a list of tuples, containing HTTP header fields and their values.
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"[Apache 2.3] there can be at most 100 header fields in a single request."
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https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
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"""
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return strategies.lists(
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strategies.tuples(header_name(), header_value()), min_size=0, max_size=100
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)
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