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# Gopher - A precursor to HTTP - RFC 1436
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2
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# Pattern attributes: good slow notsofast undermatch
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# Protocol groups: document_retrieval obsolete ietf_rfc_documented
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# Wiki: http://www.protocolinfo.org/wiki/Gopher
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# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE
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6
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#
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# Gopher servers usually run on TCP port 70.
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8
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#
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# This pattern is lightly tested using gopher.dna.affrc.go.jp .
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10
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11
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gopher
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12
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# This matches the server's response, but naturally only if it is a
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13
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# directory listing, not if it is sending a file, because then the data
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14
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# is totally arbitrary.
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15
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16
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# Matches the client saying "list what you have", then the server
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# response: one of the file type characters, any printable characters, a
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# tab, any printable characters, a tab, something that looks like a
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19
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# domain name, a tab, and then a number which could be the start of a
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# port number.
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21
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# "0About internet Gopher\tStuff:About us\trawBits.micro.umn.edu\t70"
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# "\r7search by keywords on protein data using wais\twaissrc:/protein_all/protein\tgopher.dna.affrc.go.jp\t70"
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24
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25
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^[\x09-\x0d]*[1-9,+tgi][\x09-\x0d -~]*\x09[\x09-\x0d -~]*\x09[a-z0-9.]*\.[a-z][a-z].?.?\x09[1-9]
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