Limiter does not work about node-rate-limiter

[hcientist]

@bitliner (i know this is not your primary concern, but I also want to use this package and am trying to troubleshoot) why does your code say

this.RateLimiterOnSeconds = new RateLimiter(4, 1*1000); // 5 requests per second

wouldn't this be 4 per second?

also, your comment points to second 1487770297, but doesn't second 1487770296 already demonstrate too many requests per second?

also, I cannot replicate your issue with static remainingRequests.

here is my test:

'use strict'

var RateLimiter = require('limiter').RateLimiter

var rateLimiterOnSeconds = new RateLimiter(4, 1*1000)
var rateLimiterOnHours = new RateLimiter(2000, 1*1000*60*60)

var queries = []
var queryCount = 100
for (var i=0; i<queryCount; i++) {
  queries.push(i)
}

function testIt (queryIndex) {
  var p = new Promise((resolve, reject) => {
    rateLimiterOnSeconds.removeTokens(1,(err, remainingRequests)=>{
      if (err) {
        console.log('error!', err);
        reject(err)
      } else {
        rateLimiterOnHours.removeTokens(1, (err2, rem2) => {
          if (err2) {
            console.log('error2!', err2);
            reject(err)
          } else {
            resolve(queryIndex)
            console.log(queryIndex, new Date().getTime()/1000, remainingRequests, rem2)
          }
        })
      }
    })
  })
  return p;
}

Promise.all(queries.map(query => {
  return testIt(query);
}))
  .then(resultsObjList => {
    console.log('done', resultsObjList)
  })
  .catch(err => {
    console.log(err)
  })

for which i get the output:

0 1490051070.527 3 1999
1 1490051070.529 2 1998
2 1490051070.53 1 1997
3 1490051070.53 0.0040000000000000036 1996
4 1490051070.766 0.008000000000000007 1995.1394444444445
5 1490051071.013 0.0040000000000000036 1994.2766666666666
6 1490051071.267 0.020000000000000018 1993.4177777777777
7 1490051071.517 0.008000000000000007 1992.5566666666666
8 1490051071.767 0.020000000000000018 1991.6955555555555
9 1490051072.017 0.020000000000000018 1990.8344444444444
10 1490051072.265 0.008000000000000007 1989.9722222222222
11 1490051072.512 0 1989.1094444444443
12 1490051072.763 0.0040000000000000036 1988.2488888888888
13 1490051073.016 0.01200000000000001 1987.3894444444443
14 1490051073.265 0.01200000000000001 1986.5277777777776
15 1490051073.516 0.016000000000000014 1985.667222222222
99 1490051073.764 0.008000000000000007 1984.8049999999998
42 1490051074.013 0.0040000000000000036 1983.9433333333332
43 1490051074.267 0.016000000000000014 1983.0844444444442
44 1490051074.515 0.008000000000000007 1982.222222222222
76 1490051074.764 0.0040000000000000036 1981.3605555555553
78 1490051075.016 0.016000000000000014 1980.5005555555554
79 1490051075.264 0.0040000000000000036 1979.638333333333
80 1490051075.517 0.016000000000000014 1978.7788888888886
82 1490051075.764 0.008000000000000007 1977.9161111111107
83 1490051076.017 0.020000000000000018 1977.0566666666662
16 1490051076.267 0.016000000000000014 1976.195555555555
94 1490051076.521 0 1975.3366666666661
95 1490051076.765 0.01200000000000001 1974.4722222222217
96 1490051077.015 0.008000000000000007 1973.6111111111106
97 1490051077.265 0.008000000000000007 1972.7499999999995
55 1490051077.517 0.016000000000000014 1971.8899999999996
56 1490051077.765 0.01200000000000001 1971.0277777777774
57 1490051078.013 0 1970.165555555555
92 1490051078.267 0.020000000000000018 1969.3066666666662
93 1490051078.516 0.016000000000000014 1968.4449999999995
63 1490051078.765 0.01200000000000001 1967.5833333333328
62 1490051079.014 0.0040000000000000036 1966.7216666666661
37 1490051079.267 0.020000000000000018 1965.8622222222216
38 1490051079.517 0.020000000000000018 1965.0011111111105
39 1490051079.763 0 1964.1377777777773
20 1490051080.015 0.01200000000000001 1963.2777777777774
40 1490051080.263 0.0040000000000000036 1962.415555555555
41 1490051080.515 0.01200000000000001 1961.5555555555552
84 1490051080.765 0.008000000000000007 1960.6944444444441
68 1490051081.014 0.008000000000000007 1959.8327777777774
69 1490051081.266 0.016000000000000014 1958.9727777777775
70 1490051081.514 0.008000000000000007 1958.1105555555553
71 1490051081.765 0.01200000000000001 1957.2499999999998
72 1490051082.014 0.0040000000000000036 1956.388333333333
87 1490051082.265 0.01200000000000001 1955.5277777777776
88 1490051082.514 0.008000000000000007 1954.666111111111
89 1490051082.765 0.01200000000000001 1953.8055555555554
90 1490051083.014 0.0040000000000000036 1952.9433333333332
91 1490051083.267 0.020000000000000018 1952.0844444444442
98 1490051083.517 0.020000000000000018 1951.2233333333331
45 1490051083.766 0.016000000000000014 1950.3616666666665
46 1490051084.015 0.01200000000000001 1949.4999999999998
47 1490051084.266 0.016000000000000014 1948.6394444444443
48 1490051084.517 0.020000000000000018 1947.7788888888888
50 1490051084.762 0 1946.915
51 1490051085.012 0 1946.0538888888889
49 1490051085.263 0.0040000000000000036 1945.1933333333334
21 1490051085.515 0.008000000000000007 1944.3333333333335
33 1490051085.766 0.01200000000000001 1943.472777777778
34 1490051086.013 0.0040000000000000036 1942.6100000000001
35 1490051086.263 0.0040000000000000036 1941.748888888889
36 1490051086.517 0.020000000000000018 1940.89
85 1490051086.762 0 1940.0261111111113
86 1490051087.017 0.020000000000000018 1939.167777777778
52 1490051087.267 0.016000000000000014 1938.3066666666668
53 1490051087.516 0.016000000000000014 1937.4450000000002
54 1490051087.767 0.020000000000000018 1936.5844444444447
58 1490051088.016 0.016000000000000014 1935.722777777778
59 1490051088.266 0.016000000000000014 1934.861666666667
60 1490051088.515 0.01200000000000001 1934.0000000000002
61 1490051088.762 0 1933.1372222222224
64 1490051089.016 0.016000000000000014 1932.2783333333334
65 1490051089.264 0.008000000000000007 1931.4161111111111
66 1490051089.516 0.016000000000000014 1930.5561111111112
67 1490051089.763 0.0040000000000000036 1929.6933333333334
73 1490051090.016 0.016000000000000014 1928.8338888888889
74 1490051090.267 0.020000000000000018 1927.9733333333334
75 1490051090.517 0.020000000000000018 1927.1122222222223
77 1490051090.763 0.0040000000000000036 1926.248888888889
81 1490051091.015 0.01200000000000001 1925.3888888888891
17 1490051091.266 0.016000000000000014 1924.5283333333336
18 1490051091.517 0.020000000000000018 1923.6677777777782
19 1490051091.765 0.008000000000000007 1922.8055555555559
24 1490051092.012 0 1921.942777777778
22 1490051092.262 0 1921.081666666667
25 1490051092.515 0.01200000000000001 1920.2222222222224
26 1490051092.766 0.016000000000000014 1919.361666666667
27 1490051093.016 0.01200000000000001 1918.5005555555558
29 1490051093.264 0.008000000000000007 1917.6383333333335
30 1490051093.516 0.016000000000000014 1916.7783333333336
31 1490051093.767 0.020000000000000018 1915.9177777777782
32 1490051094.013 0.0040000000000000036 1915.054444444445
23 1490051094.267 0.020000000000000018 1914.195555555556
28 1490051094.516 0.016000000000000014 1913.3338888888893
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  99 ]

[hcientist]

I am trying to limit a call to an external API to 5 queries per second and 200 queries per minute. My code is like below:

let perSecondLimiter = new RateLimiter(5, 1001)
let perMinLimiter = new RateLimiter(200, 60*1000+1)

function search (query) {
  let p = new Promise(function (resolve, reject) {
    perSecondLimiter.removeTokens(1, (psErr, remainingPS) => {
      if (psErr) {
        reject(psErr)
      } else {
        perMinLimiter.removeTokens(1, (pmErr, remainingPM) => {
          if (pmErr) {
            reject(pmErr)
          } else {
            console.log(query, new Date().getTime()/1000, remainingPM, remainingPS)
            var requestOptions = {
              jar: true
            }
            requestOptions.url = encodeURI(THIRD_PARTY_API_URL + query)
            request(requestOptions, myCallback(resolve, reject))
          }
        })
      }
    })
  })
  return p
}

here is some output of a test with 1000 queries (I have the test stop when it detects the service has cut us off due to exceeding rate limits):

0 1490055774.498 199 4
1 1490055774.505 198 3
2 1490055774.506 197 2
3 1490055774.506 196 1
4 1490055774.506 195 0
59 1490055774.689 194.6366560557324 0.00899100899100902
245 1490055774.901 194.34331094481757 0.01798201798201804
305 1490055775.088 193.96663388943517 0.0019980019980019303
361 1490055775.29 193.63995600073332 0.0009990009990008542
91 1490055775.493 193.31661138981016 0.009990009990009874
315 1490055775.69 192.97326711221478 0.003996003996003861
652 1490055775.891 192.64325594573424 0.0029970029970027845
355 1490055776.092 192.3132447792537 0.006993006993006867
670 1490055776.297 191.99323344610926 0.025974025974025983
756 1490055776.489 191.63655605739908 0
757 1490055776.691 191.30987816869722 0.00899100899100902
397 1490055776.896 190.9898668355528 0.027972027972027913
563 1490055777.091 190.64318928017872 0.0019980019980019303
564 1490055777.29 190.30651155814076 0.0009990009990010762
467 1490055777.496 189.9931667805537 0.02497502497502513
931 1490055777.695 189.65648905851575 0.018981018981019115
586 1490055777.892 189.31314478092037 0.007992007992008165
587 1490055778.092 188.9798003366611 0.0019980019980021524
88 1490055778.296 188.65978900351666 0.025974025974026205
89 1490055778.491 188.30977817036387 2.220446049250313e-16
367 1490055778.694 187.98310028166202 0.008991008991009242
357 1490055778.897 187.66308894851758 0.022977022977023198
232 1490055779.092 187.3130781153648 0.0019980019980021524
233 1490055779.294 186.98640022666294 0.005994005994006235
868 1490055779.496 186.65972233796109 0.014985014985015255
165 1490055779.695 186.32304461592312 0.013986013986014179
390 1490055779.898 185.99970000499997 0.022977022977023198
909 1490055780.098 185.6663555607407 0.021978021978022122
951 1490055780.294 185.31967800536663 0.0009990009990010762
146 1490055780.498 184.9996666722222 0.01998001998002019
20 1490055780.694 184.65298911684812 0.003996003996004305
21 1490055780.899 184.33631106148238 0.02297702297702342
398 1490055781.097 183.99630006166572 0.01198801198801247
499 1490055781.298 183.66628889518518 0.015984015984016553
622 1490055781.499 183.3329444509259 0.014985014985015477
629 1490055781.7 183.00626656222406 0.023976023976024496
109 1490055781.899 182.6695888401861 0.017982017982018483
24 1490055782.099 182.33624439592683 0.01698301698301763
689 1490055782.299 182.00289995166756 0.020979020979021712
63 1490055782.504 181.68622189630182 0.004995004995005825
415 1490055782.696 181.3262112298129 0.003996003996004749
64 1490055782.902 181.01286645222586 0.022977022977023864
81 1490055783.099 180.6695221746305 0.011988011988012914
905 1490055783.302 180.34617756370733 0.025974025974027093
731 1490055783.501 180.00949984166937 0.01998001998002108
733 1490055783.697 179.6628222862953 0.003996003996005193
30 1490055783.898 179.33281111981475 0.002997002997004339
449 1490055784.1 179.0061332311129 0.011988011988013358
603 1490055784.297 178.66278895351752 0.0009990009990024085
604 1490055784.497 178.32944450925825 1.5543122344752192e-15
605 1490055784.701 178.00943317611382 0.01398601398601551
774 1490055784.902 177.67942200963327 0.02297702297702453
144 1490055785.104 177.35274412093142 0.021978021978023454
861 1490055785.303 177.01606639889346 0.0209790209790226
131 1490055785.498 176.66605556574066 1.5543122344752192e-15
944 1490055785.702 176.34604423259623 0.01898101898102067
945 1490055785.903 176.01603306611568 0.022977022977024752
666 1490055786.104 175.68602189963514 0.021978021978023676
199 1490055786.302 175.34601089981848 0.015984015984017663
200 1490055786.505 175.02266628889532 0.02997002997003162
455 1490055786.702 174.67932201129994 0.008991008991010574
80 1490055786.905 174.3559774003768 0.02297702297702453
738 1490055787.103 174.0126331227814 0.01198801198801358
992 1490055787.305 173.68928851185825 0.0209790209790226
136 1490055787.5 173.33927767870546 1.5543122344752192e-15
153 1490055787.705 173.02259962333972 0.01898101898102067
593 1490055787.905 172.68925517908045 0.017982017982019594
854 1490055788.103 172.3492441792638 0.006993006993008644
145 1490055788.303 172.01589973500452 0.005994005994007567
825 1490055788.505 171.68922184630267 0.014985014985016587
767 1490055788.705 171.3525441242647 0.01398601398601551
768 1490055788.905 171.02253295778416 0.012987012987014657
876 1490055789.105 170.6891885135249 0.01198801198801358
700 1490055789.305 170.35584406926563 0.010989010989012504
525 1490055789.505 170.02249962500636 0.009990009990011428
41 1490055789.704 169.6858219029684 0.003996003996005415
974 1490055789.905 169.35581073648785 0.007992007992009498
561 1490055790.106 169.0257995700073 0.01198801198801358
882 1490055790.305 168.68912184796935 0.005994005994007567
932 1490055790.505 168.35577740371008 0.004995004995006491
174 1490055790.705 168.0224329594508 0.003996003996005415
856 1490055790.908 167.69908834852765 0.017982017982019594
246 1490055791.105 167.35574407093227 0.006993006993008644
247 1490055791.308 167.03239946000912 0.015984015984017663
248 1490055791.505 166.68905518241374 1.7763568394002505e-15
548 1490055791.705 166.35571073815447 0.003996003996005859
657 1490055791.91 166.03903268278873 0.022977022977024975
252 1490055792.107 165.69568840519335 0.006993006993009088
844 1490055792.306 165.3590106831554 0.0059940059940080115
94 1490055792.507 165.02899951667484 0.004995004995007157
95 1490055792.706 164.69232179463688 0.003996003996006303
370 1490055792.908 164.36564390593503 0.007992007992010386
836 1490055793.107 164.02563290611837 0.001998001998004373
860 1490055793.311 163.70895485075263 0.02097902097902349
837 1490055793.507 163.36227729537856 0.004995004995007601
838 1490055793.711 163.04226596223413 0.023976023976026495
827 1490055793.911 162.70892151797486 0.02297702297702542
828 1490055794.112 162.3789103514943 0.021978021978024342
673 1490055794.308 162.03223279612024 0.0009990009990032966
490 1490055794.511 161.70888818519708 0.014985014985017253
461 1490055794.712 161.37887701871654 0.018981018981021336
450 1490055794.908 161.03219946334247 0.002997002997005449
777 1490055795.109 160.70218829686192 0.001998001998004373
271 1490055795.31 160.37217713038137 0.010989010989013392
762 1490055795.51 160.0388326861221 0.004995004995007379
540 1490055795.712 159.71215479742025 0.013986013986016399
19 1490055795.912 159.378810353161 0.017982017982020482
147 1490055796.11 159.03879935334433 0.001998001998004595
222 1490055796.31 158.70545490908506 0.0009990009990037407
643 1490055796.509 158.3687771870471 2.6645352591003757e-15
690 1490055796.713 158.04876585390267 0.013986013986016843
84 1490055796.914 157.71875468742212 0.022977022977025863
430 1490055797.113 157.38207696538416 0.011988011988014913
55 1490055797.311 157.0420659655675 0.0009990009990039628
477 1490055797.513 156.71538807686565 0.01498501498501792
782 1490055797.714 156.3853769103851 0.013986013986017065
941 1490055797.913 156.04869918834714 0.012987012987016211
42 1490055798.114 155.7186880218666 0.011988011988015135
155 1490055798.315 155.38867685538605 0.015984015984019218
521 1490055798.514 155.0519991333481 0.009990009990013204
327 1490055798.716 154.72532124464624 0.02397602397602716
659 1490055798.912 154.37864368927217 0.002997002997006115
406 1490055799.115 154.055299078349 0.011988011988015135
900 1490055799.315 153.72195463408974 0.010989010989014059
727 1490055799.517 153.3952767453879 0.019980019980023078
901 1490055799.714 153.0519324677925 0.008991008991012128
902 1490055799.917 152.72858785686935 0.017982017982021148
570 1490055800.118 152.3985766903888 0.02197802197802523
338 1490055800.314 152.05189913501474 0.0009990009990044069
339 1490055800.519 151.735221079649 0.02497502497502846
862 1490055800.715 151.3852102464962 0.003996003996007413
863 1490055800.917 151.06186563557304 0.017982017982021592
431 1490055801.117 150.72518791353508 0.011988011988015579
340 1490055801.316 150.3918434692758 0.005994005994009566
341 1490055801.518 150.06516558057396 0.014985014985018585
729 1490055801.719 149.73515441409342 0.018981018981022668
509 1490055801.916 149.39181013649804 0.0029970029970067813
510 1490055802.116 149.05846569223877 0.006993006993010864
965 1490055802.321 148.74178763687303 0.02097902097902482
653 1490055802.518 148.39844335927765 0.00999000999001387
654 1490055802.72 148.0717654705758 0.01898101898102289
648 1490055802.919 147.73508774853784 0.017982017982021814
321 1490055803.116 147.39174347094246 0.001998001998005927
304 1490055803.319 147.0683988600193 0.010989010989014947
883 1490055803.519 146.73505441576003 0.00999000999001387
884 1490055803.718 146.39837669372207 0.008991008991012794
393 1490055803.923 146.08169863835633 0.02797202797203191
394 1490055804.123 145.74835419409706 0.026973026973030834
755 1490055804.32 145.40500991650168 0.010989010989014947
37 1490055804.522 145.07833202779983 0.024975024975028903
216 1490055804.719 144.73498775020445 0.0039960039960078575
217 1490055804.922 144.4116431392813 0.017982017982022036
218 1490055805.12 144.07163213946464 0.006993006993011086
859 1490055805.322 143.7449542507628 0.020979020979025043
187 1490055805.518 143.39827669538872 3.9968028886505635e-15
188 1490055805.722 143.07826536224428 0.013986013986018175
189 1490055805.919 142.7349210846489 0.0029970029970072254
190 1490055806.124 142.41824302928316 0.02197802197802634
904 1490055806.322 142.0782320294665 0.01098901098901539
906 1490055806.522 141.74488758520724 0.009990009990014537
227 1490055806.722 141.41154314094797 0.008991008991013683
458 1490055806.922 141.0781986966887 0.007992007992012828
426 1490055807.122 140.74485425242943 0.006993006993011974
325 1490055807.323 140.4148430859489 0.010989010989016057
698 1490055807.52 140.0714988083535 5.10702591327572e-15
699 1490055807.726 139.75815403076646 0.02397602397602916
388 1490055807.921 139.40814319761367 0.0029970029970081136
389 1490055808.123 139.08146530891182 0.011988011988017133
977 1490055808.323 138.74812086465255 0.0009990009990061832
684 1490055808.521 138.4081098648359 5.10702591327572e-15
685 1490055808.727 138.09476508724885 0.023976023976028937
686 1490055808.926 137.75808736521088 0.017982017982022924
869 1490055809.123 137.4147430876155 0.006993006993011974
794 1490055809.322 137.07806536557754 0.0009990009990059612
795 1490055809.526 136.7580540324331 0.01498501498502014
115 1490055809.723 136.41470975483773 0.00399600399600919
116 1490055809.927 136.0946984216933 0.022977022977028083
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[hcientist]

perhaps this would be a better approach for my project? https://github.com/eventEmitter/request-rate-limiter will update

[jonathanstokes]

I have this same problem. It's like the whole purpose of the library isn't working.

[josh-mercarto]

This library is still not working for me. This simple test fails and my mockFn is never called.

import * as Limiter from "limiter";

test("should invoke function if tokens are remaining", () => {
const mockFn = jest.fn().mockReturnValue(5);
const limiter = new Limiter.RateLimiter(5, "sec");

    limiter.removeTokens(1, function (err, remainingRequests) {
      mockFn();
    });
    expect(mockFn).toHaveBeenCalled();
}

[jhurliman]

@josh-mercarto that test looks like you are expecting the callback to have been synchronously executed before moving to the next line? That won’t happen.

[boly38]

Hello,

following #68 I'm using this lib on my website which is making rate limited etsy api call (creharmony/node-etsy-client#19)
I encounter issue because when setting rate limiter do 10 or 9,8,or 7 per seconds, I reached etsy limits in any cases (10/sec).
So for me there is an issue I'm trying to understand. To diagnose this library, I've done a little sample.

==> cf draft PR #70

What I encounter during my tests:

• setting 10/sec, the test show me that I'm almost always around 10 per seconds
• sometime I got 11 queries in the second window. That's violate the contract but dont hurt me so much
• but sometime at the first slot, there is double of allowed queries that are made, ie. 20queries/sec! and this point seems to be a major issue because I can't deal with this point.

PromiseWithResult==>RESULT:promiseWithResult18
PromiseWithResult==>RESULT:promiseWithResult19
duration: 1006ms => 20 / 20
PromiseWithResult==>RESULT:promiseWithResult20
PromiseWithResult==>RESULT:promiseWithResult21

I dont see a fix for this 2017 issue so I'm less and less confident in this library. Any hint would be greatly appreciated