import strutils, strformat, sequtils, uri, tables import nimcrypto, regex const key = "supersecretkey" twitterDomains = @[ "twitter.com", "twimg.com", "abs.twimg.com", "pbs.twimg.com", "video.twimg.com" ] proc getHmac*(data: string): string = ($hmac(sha256, key, data))[0 .. 12] proc getVidUrl*(link: string): string = let sig = getHmac(link) url = encodeUrl(link) &"/video/{sig}/{url}" proc getGifUrl*(link: string): string = &"/gif/{encodeUrl(link)}" proc getPicUrl*(link: string): string = &"/pic/{encodeUrl(link)}" proc cleanFilename*(filename: string): string = const reg = re"[^A-Za-z0-9._-]" filename.replace(reg, "_") proc filterParams*(params: Table): seq[(string, string)] = let filter = ["name", "id", "list", "referer"] toSeq(params.pairs()).filterIt(it[0] notin filter and it[1].len > 0) proc isTwitterUrl*(url: string): bool = parseUri(url).hostname in twitterDomains