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49 lines
1.2 KiB
Nim
49 lines
1.2 KiB
Nim
import strutils, strformat, sequtils, uri, tables
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import nimcrypto, regex
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var hmacKey = "secretkey"
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const
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badJpgExts = @["1500x500", "jpgn", "jpg:", "jpg_"]
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badPngExts = @["pngn", "png:", "png_"]
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twitterDomains = @[
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"twitter.com",
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"twimg.com",
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"abs.twimg.com",
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"pbs.twimg.com",
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"video.twimg.com"
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]
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proc setHmacKey*(key: string) =
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hmacKey = key
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proc getHmac*(data: string): string =
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($hmac(sha256, hmacKey, data))[0 .. 12]
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proc getVidUrl*(link: string): string =
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let
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sig = getHmac(link)
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url = encodeUrl(link)
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&"/video/{sig}/{url}"
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proc getGifUrl*(link: string): string =
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&"/gif/{encodeUrl(link)}"
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proc getPicUrl*(link: string): string =
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&"/pic/{encodeUrl(link)}"
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proc cleanFilename*(filename: string): string =
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const reg = re"[^A-Za-z0-9._-]"
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result = filename.replace(reg, "_")
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if badJpgExts.anyIt(it in result):
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result &= ".jpg"
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elif badPngExts.anyIt(it in result):
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result &= ".png"
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proc filterParams*(params: Table): seq[(string, string)] =
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let filter = ["name", "id", "list", "referer"]
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toSeq(params.pairs()).filterIt(it[0] notin filter and it[1].len > 0)
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proc isTwitterUrl*(url: string): bool =
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parseUri(url).hostname in twitterDomains
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