76 lines
2.1 KiB
Python
76 lines
2.1 KiB
Python
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import urllib.parse
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# Convert an IRI to a URI following the rules in RFC 3987
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#
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# The characters we need to enocde and escape are defined in the spec:
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#
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# iprivate = %xE000-F8FF / %xF0000-FFFFD / %x100000-10FFFD
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# ucschar = %xA0-D7FF / %xF900-FDCF / %xFDF0-FFEF
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# / %x10000-1FFFD / %x20000-2FFFD / %x30000-3FFFD
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# / %x40000-4FFFD / %x50000-5FFFD / %x60000-6FFFD
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# / %x70000-7FFFD / %x80000-8FFFD / %x90000-9FFFD
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# / %xA0000-AFFFD / %xB0000-BFFFD / %xC0000-CFFFD
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# / %xD0000-DFFFD / %xE1000-EFFFD
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escape_range = [
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(0xA0, 0xD7FF),
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(0xE000, 0xF8FF),
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(0xF900, 0xFDCF),
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(0xFDF0, 0xFFEF),
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(0x10000, 0x1FFFD),
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(0x20000, 0x2FFFD),
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(0x30000, 0x3FFFD),
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(0x40000, 0x4FFFD),
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(0x50000, 0x5FFFD),
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(0x60000, 0x6FFFD),
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(0x70000, 0x7FFFD),
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(0x80000, 0x8FFFD),
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(0x90000, 0x9FFFD),
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(0xA0000, 0xAFFFD),
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(0xB0000, 0xBFFFD),
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(0xC0000, 0xCFFFD),
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(0xD0000, 0xDFFFD),
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(0xE1000, 0xEFFFD),
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(0xF0000, 0xFFFFD),
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(0x100000, 0x10FFFD),
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]
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def encode(c):
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retval = c
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i = ord(c)
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for low, high in escape_range:
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if i < low:
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break
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if i >= low and i <= high:
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retval = "".join(["%%%2X" % o for o in c.encode('utf-8')])
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break
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return retval
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def iri2uri(uri):
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"""Convert an IRI to a URI. Note that IRIs must be
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passed in a unicode strings. That is, do not utf-8 encode
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the IRI before passing it into the function."""
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assert uri != None, 'iri2uri must be passed a non-none string!'
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original = uri
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if isinstance(uri ,str):
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(scheme, authority, path, query, fragment) = urllib.parse.urlsplit(uri)
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authority = authority.encode('idna').decode('utf-8')
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# For each character in 'ucschar' or 'iprivate'
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# 1. encode as utf-8
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# 2. then %-encode each octet of that utf-8
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path = urllib.parse.quote(path)
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uri = urllib.parse.urlunsplit((scheme, authority, path, query, fragment))
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uri = "".join([encode(c) for c in uri])
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# urllib.parse.urlunsplit(urllib.parse.urlsplit({something})
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# strips any trailing "?" chars. While this may be legal according to the
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# spec, it breaks some services. Therefore, we patch
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# the "?" back in if it has been removed.
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if original.endswith("?") and not uri.endswith("?"):
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uri = uri+"?"
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return uri
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