74 lines
2.0 KiB
Nim
74 lines
2.0 KiB
Nim
import asyncdispatch, httpclient, times, sequtils, strutils, json
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import types, agents, consts
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var tokenPool {.threadvar.}: 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": getAgent(),
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"authorization": auth
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})
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client = newAsyncHttpClient(headers=headers)
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var
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resp: string
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tok: string
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try:
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resp = await client.postContent(activate)
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tok = parseJson(resp)["guest_token"].getStr
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let time = getTime()
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result = Token(tok: tok, remaining: 187, reset: time + 15.minutes,
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init: time, lastUse: time)
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except Exception as e:
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echo "fetching token failed: ", e.msg
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return Token()
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finally:
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client.close()
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proc expired(token: Token): bool {.inline.} =
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const
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expirationTime = 2.hours
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maxLastUse = 1.hours
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let time = getTime()
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result = token.init < time - expirationTime or
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token.lastUse < time - maxLastUse
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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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token.lastUse = getTime()
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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.countIt(not it.isLimited) < cfg.minTokens:
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await poolTokens(min(4, cfg.minTokens - tokenPool.len))
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await sleepAsync(2000)
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