60 lines
1.8 KiB
Nim
60 lines
1.8 KiB
Nim
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import asyncdispatch, httpclient, times, sequtils, strutils
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import types
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var tokenPool: seq[Token]
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proc fetchToken(): Future[Token] {.async.} =
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let
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headers = newHttpHeaders({
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"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
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"accept-language": "en-US,en;q=0.5",
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"connection": "keep-alive",
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"user-agent": "Mozilla/5.0 (X11; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0"
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})
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client = newAsyncHttpClient(headers=headers)
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resp = await client.getContent("https://twitter.com")
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pos = resp.rfind("gt=")
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try: client.close()
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except: discard
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if pos == -1: echo "token parse fail"; return
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result = Token(tok: resp[pos+3 .. pos+21], limit: 187, remaining: 187,
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reset: getTime() + 15.minutes, init: getTime())
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proc expired(token: Token): bool {.inline.} =
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const expirationTime = 1.hours
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result = token.init < getTime() - expirationTime
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proc isLimited(token: Token): bool {.inline.} =
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token == nil or token.remaining <= 1 and token.reset > getTime() or
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token.expired
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proc release*(token: Token) =
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if token != nil and not token.expired:
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tokenPool.insert(token)
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proc getToken*(): Future[Token] {.async.} =
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for i in 0 ..< tokenPool.len:
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if not result.isLimited: break
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result.release()
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result = tokenPool.pop()
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if result.isLimited:
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result.release()
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result = await fetchToken()
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proc poolTokens*(amount: int) {.async.} =
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var futs: seq[Future[Token]]
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for i in 0 ..< amount:
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futs.add fetchToken()
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for token in futs:
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release(await token)
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proc initTokenPool*(cfg: Config) {.async.} =
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while true:
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if tokenPool.filterIt(not it.isLimited).len < cfg.minTokens:
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await poolTokens(min(5, cfg.minTokens - tokenPool.len))
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await sleepAsync(4000)
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