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Dezenas de solicitações HTTP idênticas do Chrome no Android

tag-icon • tag-icon http google-chrome android
Dezenas de solicitações HTTP idênticas do Chrome no Android

Estou vendo um padrão estranho no meu log de acesso HTTP. Às vezes, um navegador Chrome móvel faz dezenas de solicitações HTTP aparentemente redundantes para obter a mesma página.

O que poderia causar esse comportamento?

  • Um aplicativo com bugs que usa a string User-Agent padrão?
  • Bug do navegador? Parece improvável, já que isso abrange pelo menos o Chrome 34 a 45.
  • Bug do Android? Parece improvável pelo mesmo motivo (pelo menos 4.4.4 a 5.1.1.).
  • Algo no site, por exemplo. Código JS que causa o redirecionamento - mas apenas nesses agentes de usuário? Isso aconteceu em vários sites (embora com o mesmo CMS), mas mais de 99% dos sites não apresentam esse comportamento.
  • Usuário, intencionalmente? Como você pressiona recarregar 20 vezes/segundo com uma tela sensível ao toque? :) (É claro que alguém poderia ter um teclado bluetooth, mas parece improvável)
  • Algo mais?

Aqui está um extrato de registro de uma ocasião. Um endereço IP, anonimizado: (hora, código de resposta, solicitação, referenciador)

19:01:33 404 "GET /6/ HTTP/1.1" "-"
19:01:34 404 "GET /favicon.ico HTTP/1.1" "-"
19:01:36 200 "GET /7/ HTTP/1.1" "http://www.example.com/6/"
19:01:41 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:01:42 200 "GET /1.jpeg HTTP/1.1" "http://www.example.com/8/"
19:01:42 200 "GET /2.jpeg HTTP/1.1" "http://www.example.com/8/"
19:01:42 200 "GET /3.jpeg HTTP/1.1" "http://www.example.com/8/"
19:01:44 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:01:45 200 "GET /10/a.css HTTP/1.1" "http://www.example.com/9/"
19:02:02 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:02:13 200 "GET /12/ HTTP/1.1" "http://www.example.com/11/"
19:02:13 200 "GET /4.jpeg HTTP/1.1" "http://www.example.com/12/"
19:02:28 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:02:29 200 "GET /5.jpeg HTTP/1.1" "http://www.example.com/13/"
19:02:34 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:09 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:11 200 "GET /15/ HTTP/1.1" "http://www.example.com/14/"
19:03:18 200 "GET /16/ HTTP/1.1" "http://www.example.com/15/"
19:03:18 200 "GET /17/b.js HTTP/1.1" "http://www.example.com/16/"
19:03:18 200 "GET /17/c.js HTTP/1.1" "http://www.example.com/16/"
19:03:18 200 "GET /17/d.js HTTP/1.1" "http://www.example.com/16/"
19:03:21 200 "GET /18/ HTTP/1.1" "http://www.example.com/16/"
19:03:26 200 "GET /16/ HTTP/1.1" "http://www.example.com/15/"
19:03:26 200 "GET /16/ HTTP/1.1" "http://www.example.com/15/"
19:03:26 200 "GET /16/ HTTP/1.1" "http://www.example.com/15/"
19:03:27 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:27 200 "GET /15/ HTTP/1.1" "http://www.example.com/14/"
19:03:27 200 "GET /15/ HTTP/1.1" "http://www.example.com/14/"
19:03:27 200 "GET /15/ HTTP/1.1" "http://www.example.com/14/"
19:03:27 200 "GET /15/ HTTP/1.1" "http://www.example.com/14/"
19:03:28 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:32 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:36 200 "GET /18/ HTTP/1.1" "http://www.example.com/16/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:44 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:45 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:45 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:45 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:45 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:45 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:45 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:46 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:46 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:46 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:46 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:46 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:47 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:48 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:48 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:48 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:48 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:48 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:48 200 "GET /16/ HTTP/1.1" "http://www.example.com/14/"
19:03:49 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:49 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:49 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:49 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:49 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:50 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:50 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:50 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:50 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:50 200 "GET /14/ HTTP/1.1" "http://www.example.com/8/"
19:03:51 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:51 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:03:51 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:51 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:51 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:52 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:52 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:52 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:52 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:52 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:53 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:53 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:53 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:53 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:53 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:53 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:54 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:54 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:55 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:55 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:55 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:55 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:55 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:55 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:56 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:57 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:57 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:57 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:57 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:57 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:57 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:58 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:58 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:58 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:58 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:58 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:58 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:59 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:59 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:59 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:59 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:59 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:03:59 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:00 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:01 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:01 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:01 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:01 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:01 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:01 200 "GET /8/ HTTP/1.1" "http://www.example.com/13/"
19:04:02 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:03 200 "GET /12/ HTTP/1.1" "http://www.example.com/11/"
19:04:03 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:03 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:03 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:03 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:04 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:04 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:04 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:04 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:04 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:05 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:05 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:05 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:05 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:05 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:06 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:06 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:06 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:06 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:06 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:07 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:07 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:07 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:07 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:07 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:08 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:08 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:08 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:08 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:08 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:09 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:09 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:09 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:09 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:09 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:10 200 "GET /13/ HTTP/1.1" "http://www.example.com/12/"
19:04:10 200 "GET /12/ HTTP/1.1" "http://www.example.com/11/"
19:04:14 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:15 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:15 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:15 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:15 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:15 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:16 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:16 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:16 200 "GET /11/ HTTP/1.1" "http://www.example.com/9/"
19:04:16 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:17 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:17 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:17 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:17 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:17 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:17 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:18 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:18 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:18 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:18 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:18 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:18 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:19 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:19 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:19 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:19 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:19 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:20 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:20 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:20 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:20 200 "GET /9/ HTTP/1.1" "http://www.example.com/8/"
19:04:21 200 "GET /7/ HTTP/1.1" "http://www.example.com/6/"
19:04:21 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:21 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:21 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:21 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:21 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:21 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:22 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:23 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:24 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:24 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:24 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:24 200 "GET /8/ HTTP/1.1" "http://www.example.com/7/"
19:04:24 200 "GET /7/ HTTP/1.1" "http://www.example.com/6/"
19:04:25 404 "GET /6/ HTTP/1.1" "-"
19:25:16 404 "GET /6/ HTTP/1.1" "-"
19:25:17 404 "GET /favicon.ico HTTP/1.1" "-"
19:43:38 404 "GET /favicon.ico HTTP/1.1" "-"
20:24:39 404 "GET /favicon.ico HTTP/1.1" "-"

Além da estranha coisa de "descansar meu dedo no F5", tudo parece uma navegação humana legítima, não um bot em fuga:

  • o usuário avança de uma página para outra, carrega imagens e ativos js/css (nem todos são mostrados aqui, pois alguns são carregados de um domínio de ativos)

  • endereços IP são endereços de operadoras móveis domésticas (várias operadoras)

  • O campo de referência parece ok

As strings User-Agent encontradas até agora com este comportamento:

Mozilla/5.0 (Linux; Android 4.4.4; SM-G357FZ Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.94 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 4.4.4; SM-G357FZ Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.94 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 5.0.1; SAMSUNG GT-I9506 Build/LRX22C) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/2.1 Chrome/34.0.1847.76 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 5.1.1; SAMSUNG SM-G920F Build/LMY47X) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/3.2 Chrome/38.0.2125.102 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 5.0.1; SAMSUNG GT-I9506 Build/LRX22C) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/2.1 Chrome/34.0.1847.76 Mobile Safari/537.36

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