initial
This commit is contained in:
commit
d1db595637
12 changed files with 711 additions and 0 deletions
25
.gitignore
vendored
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25
.gitignore
vendored
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@ -0,0 +1,25 @@
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# ---> Go
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# If you prefer the allow list template instead of the deny list, see community template:
|
||||
# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
|
||||
#
|
||||
# Binaries for programs and plugins
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||||
*.exe
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*.exe~
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*.dll
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*.so
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*.dylib
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main
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||||
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||||
# Test binary, built with `go test -c`
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*.test
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||||
|
||||
# Output of the go coverage tool, specifically when used with LiteIDE
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||||
*.out
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||||
|
||||
# Dependency directories (remove the comment below to include it)
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vendor/
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# Go workspace file
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go.work
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.idea
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.vscode
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9
LICENSE
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9
LICENSE
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@ -0,0 +1,9 @@
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MIT License
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Copyright (c) 2023 Neur0toxine
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|
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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14
README.md
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14
README.md
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@ -0,0 +1,14 @@
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# vk webhook flooder mock
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Test app with routes for:
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- MG message receiving
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- VK users.get method
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- custom api that floods vk transport with requests
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a lot of stuff is hardcoded, even more is coded poorly because I didn't have enough time.
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read code to understand what it does. there is not a lot of it.
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fetch deps with `go mod tidy && go mod vendor`
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build with `go build -o main .`
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enjoy! ~
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21
dto/dto.go
Normal file
21
dto/dto.go
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@ -0,0 +1,21 @@
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package dto
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import "time"
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// MessagesResponse message event response.
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type MessagesResponse struct {
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MessageID int `json:"message_id,omitempty"`
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Time time.Time `json:"time,omitempty"`
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}
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type VKRequest struct {
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AccessToken string `form:"access_token,omitempty"`
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V string `form:"v,omitempty"`
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}
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type UsersGetRequest struct {
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VKRequest
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Lang int `form:"lang"`
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UserIDs []string `form:"user_ids"`
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Fields string `form:"fields"`
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}
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44
go.mod
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44
go.mod
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@ -0,0 +1,44 @@
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module vk-webhook-flooder-mock
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go 1.19
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require (
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github.com/JGLTechnologies/gin-rate-limit v1.5.2
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github.com/SevereCloud/vksdk/v2 v2.15.0
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github.com/allegro/bigcache/v3 v3.1.0
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github.com/gin-gonic/gin v1.8.2
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github.com/retailcrm/mg-transport-api-client-go v1.2.4
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go.uber.org/atomic v1.10.0
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)
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require (
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github.com/cespare/xxhash/v2 v2.1.2 // indirect
|
||||
github.com/davecgh/go-spew v1.1.1 // indirect
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||||
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
|
||||
github.com/gin-contrib/sse v0.1.0 // indirect
|
||||
github.com/go-playground/locales v0.14.0 // indirect
|
||||
github.com/go-playground/universal-translator v0.18.0 // indirect
|
||||
github.com/go-playground/validator/v10 v10.11.1 // indirect
|
||||
github.com/go-redis/redis/v8 v8.11.5 // indirect
|
||||
github.com/goccy/go-json v0.9.11 // indirect
|
||||
github.com/google/go-querystring v1.0.0 // indirect
|
||||
github.com/json-iterator/go v1.1.12 // indirect
|
||||
github.com/klauspost/compress v1.15.8 // indirect
|
||||
github.com/leodido/go-urn v1.2.1 // indirect
|
||||
github.com/mattn/go-isatty v0.0.16 // indirect
|
||||
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
|
||||
github.com/modern-go/reflect2 v1.0.2 // indirect
|
||||
github.com/pelletier/go-toml/v2 v2.0.6 // indirect
|
||||
github.com/pmezard/go-difflib v1.0.0 // indirect
|
||||
github.com/stretchr/testify v1.8.1 // indirect
|
||||
github.com/ugorji/go/codec v1.2.7 // indirect
|
||||
github.com/vmihailenco/msgpack/v5 v5.3.5 // indirect
|
||||
github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
|
||||
golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d // indirect
|
||||
golang.org/x/net v0.4.0 // indirect
|
||||
golang.org/x/sys v0.3.0 // indirect
|
||||
golang.org/x/text v0.5.0 // indirect
|
||||
google.golang.org/protobuf v1.28.1 // indirect
|
||||
gopkg.in/yaml.v2 v2.4.0 // indirect
|
||||
gopkg.in/yaml.v3 v3.0.1 // indirect
|
||||
)
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||||
137
go.sum
Normal file
137
go.sum
Normal file
|
|
@ -0,0 +1,137 @@
|
|||
github.com/JGLTechnologies/gin-rate-limit v1.5.2 h1:zPMvOBhiIE6rozLFnLHes5EhCzkqCwILhTANuSfYKiw=
|
||||
github.com/JGLTechnologies/gin-rate-limit v1.5.2/go.mod h1:XGo66/RNHkTgCPdaaFyFtTVnm2G45FDrvT5OFjCTnQ0=
|
||||
github.com/SevereCloud/vksdk/v2 v2.15.0 h1:ywyJvuJzN1sD5+GVcYendwNTpK3R/iBZOlOhulyI9ZQ=
|
||||
github.com/SevereCloud/vksdk/v2 v2.15.0/go.mod h1:0Q20DuofWA78Vdy6aPjZAM6ep1UR6uVEf/fCqdmBYaY=
|
||||
github.com/allegro/bigcache/v3 v3.1.0 h1:H2Vp8VOvxcrB91o86fUSVJFqeuz8kpyyB02eH3bSzwk=
|
||||
github.com/allegro/bigcache/v3 v3.1.0/go.mod h1:aPyh7jEvrog9zAwx5N7+JUQX5dZTSGpxF1LAR4dr35I=
|
||||
github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
|
||||
github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
|
||||
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
|
||||
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
|
||||
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
|
||||
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
|
||||
github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
|
||||
github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
|
||||
github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
|
||||
github.com/gin-gonic/gin v1.8.2 h1:UzKToD9/PoFj/V4rvlKqTRKnQYyz8Sc1MJlv4JHPtvY=
|
||||
github.com/gin-gonic/gin v1.8.2/go.mod h1:qw5AYuDrzRTnhvusDsrov+fDIxp9Dleuu12h8nfB398=
|
||||
github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A=
|
||||
github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
|
||||
github.com/go-playground/locales v0.14.0 h1:u50s323jtVGugKlcYeyzC0etD1HifMjqmJqb8WugfUU=
|
||||
github.com/go-playground/locales v0.14.0/go.mod h1:sawfccIbzZTqEDETgFXqTho0QybSa7l++s0DH+LDiLs=
|
||||
github.com/go-playground/universal-translator v0.18.0 h1:82dyy6p4OuJq4/CByFNOn/jYrnRPArHwAcmLoJZxyho=
|
||||
github.com/go-playground/universal-translator v0.18.0/go.mod h1:UvRDBj+xPUEGrFYl+lu/H90nyDXpg0fqeB/AQUGNTVA=
|
||||
github.com/go-playground/validator/v10 v10.11.1 h1:prmOlTVv+YjZjmRmNSF3VmspqJIxJWXmqUsHwfTRRkQ=
|
||||
github.com/go-playground/validator/v10 v10.11.1/go.mod h1:i+3WkQ1FvaUjjxh1kSvIA4dMGDBiPU55YFDl0WbKdWU=
|
||||
github.com/go-redis/redis/v8 v8.11.5 h1:AcZZR7igkdvfVmQTPnu9WE37LRrO/YrBH5zWyjDC0oI=
|
||||
github.com/go-redis/redis/v8 v8.11.5/go.mod h1:gREzHqY1hg6oD9ngVRbLStwAWKhA0FEgq8Jd4h5lpwo=
|
||||
github.com/goccy/go-json v0.9.11 h1:/pAaQDLHEoCq/5FFmSKBswWmK6H0e8g4159Kc/X/nqk=
|
||||
github.com/goccy/go-json v0.9.11/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
|
||||
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
|
||||
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
|
||||
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
|
||||
github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
|
||||
github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
|
||||
github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
|
||||
github.com/gorilla/schema v1.2.0/go.mod h1:kgLaKoK1FELgZqMAVxx/5cbj0kT+57qxUrAlIO2eleU=
|
||||
github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
|
||||
github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
|
||||
github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslCrtky5vbi9dd7HrQPQIx6wqiw=
|
||||
github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI=
|
||||
github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
|
||||
github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
|
||||
github.com/klauspost/compress v1.15.8 h1:JahtItbkWjf2jzm/T+qgMxkP9EMHsqEUA6vCMGmXvhA=
|
||||
github.com/klauspost/compress v1.15.8/go.mod h1:PhcZ0MbTNciWF3rruxRgKxI5NkcHHrHUDtV4Yw2GlzU=
|
||||
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
|
||||
github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
|
||||
github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
|
||||
github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
|
||||
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
|
||||
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
|
||||
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
|
||||
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
|
||||
github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
|
||||
github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
|
||||
github.com/mattn/go-isatty v0.0.16 h1:bq3VjFmv/sOjHtdEhmkEV4x1AJtvUvOJ2PFAZ5+peKQ=
|
||||
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
|
||||
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
|
||||
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
|
||||
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
|
||||
github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
|
||||
github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
|
||||
github.com/nbio/st v0.0.0-20140626010706-e9e8d9816f32/go.mod h1:9wM+0iRr9ahx58uYLpLIr5fm8diHn0JbqRycJi6w0Ms=
|
||||
github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
|
||||
github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
|
||||
github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
|
||||
github.com/pelletier/go-toml/v2 v2.0.6 h1:nrzqCb7j9cDFj2coyLNLaZuJTLjWjlaz6nvTvIwycIU=
|
||||
github.com/pelletier/go-toml/v2 v2.0.6/go.mod h1:eumQOmlWiOPt5WriQQqoM5y18pDHwha2N+QD+EUNTek=
|
||||
github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
|
||||
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
|
||||
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
|
||||
github.com/retailcrm/mg-transport-api-client-go v1.2.4 h1:onDJI/StNyZjW1rsRBsMrKumKU4HXhF7lJMsG1t8QZw=
|
||||
github.com/retailcrm/mg-transport-api-client-go v1.2.4/go.mod h1:gDe/tj7t3Hr/uwIFSBVgGAmP85PoLajVl1A+skBo1Ro=
|
||||
github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
|
||||
github.com/rogpeppe/go-internal v1.8.0 h1:FCbCCtXNOY3UtUuHUYaghJg4y7Fd14rXifAYUAtL9R8=
|
||||
github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE=
|
||||
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
|
||||
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
|
||||
github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
|
||||
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
|
||||
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
|
||||
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
|
||||
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
|
||||
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
|
||||
github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
|
||||
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
|
||||
github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
|
||||
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
|
||||
github.com/ugorji/go v1.2.7/go.mod h1:nF9osbDWLy6bDVv/Rtoh6QgnvNDpmCalQV5urGCCS6M=
|
||||
github.com/ugorji/go/codec v1.2.7 h1:YPXUKf7fYbp/y8xloBqZOw2qaVggbfwMlI8WM3wZUJ0=
|
||||
github.com/ugorji/go/codec v1.2.7/go.mod h1:WGN1fab3R1fzQlVQTkfxVtIBhWDRqOviHU95kRgeqEY=
|
||||
github.com/vmihailenco/msgpack/v5 v5.3.5 h1:5gO0H1iULLWGhs2H5tbAHIZTV8/cYafcFOr9znI5mJU=
|
||||
github.com/vmihailenco/msgpack/v5 v5.3.5/go.mod h1:7xyJ9e+0+9SaZT0Wt1RGleJXzli6Q/V5KbhBonMG9jc=
|
||||
github.com/vmihailenco/tagparser/v2 v2.0.0 h1:y09buUbR+b5aycVFQs/g70pqKVZNBmxwAhO7/IwNM9g=
|
||||
github.com/vmihailenco/tagparser/v2 v2.0.0/go.mod h1:Wri+At7QHww0WTrCBeu4J6bNtoV6mEfg5OIWRZA9qds=
|
||||
go.uber.org/atomic v1.10.0 h1:9qC72Qh0+3MqyJbAn8YU5xVq1frD8bn3JtD2oXtafVQ=
|
||||
go.uber.org/atomic v1.10.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
|
||||
golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
|
||||
golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d h1:sK3txAijHtOK88l68nt020reeT1ZdKLIYetKl95FzVY=
|
||||
golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
|
||||
golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
|
||||
golang.org/x/net v0.4.0 h1:Q5QPcMlvfxFTAPV0+07Xz/MpK9NTXu2VDUuy0FeMfaU=
|
||||
golang.org/x/net v0.4.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
|
||||
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
|
||||
golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
|
||||
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
|
||||
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
|
||||
golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
|
||||
golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
|
||||
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
|
||||
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
|
||||
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
|
||||
google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
|
||||
google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
|
||||
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
|
||||
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
|
||||
gopkg.in/h2non/gock.v1 v1.1.2 h1:jBbHXgGBK/AoPVfJh5x4r/WxIrElvbLel8TCZkkZJoY=
|
||||
gopkg.in/h2non/gock.v1 v1.1.2/go.mod h1:n7UGz/ckNChHiK05rDoiC4MYSunEC/lyaUm2WWaDva0=
|
||||
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
|
||||
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
|
||||
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
|
||||
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
|
||||
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
|
||||
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||
116
handler/app.go
Normal file
116
handler/app.go
Normal file
|
|
@ -0,0 +1,116 @@
|
|||
package handler
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net/http"
|
||||
"os"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/gin-gonic/gin"
|
||||
)
|
||||
|
||||
var (
|
||||
vkToken = os.Getenv("VK_TOKEN")
|
||||
bodyTemplate = `{"group_id":183208397,"type":"message_new","event_id":"7dff3c1982dfbd9e6011948ab9b5da352d903c94","v":"5.131","object":{"message":{"date":%d,"from_id":%d,"id":%d,"out":0,"attachments":[],"conversation_message_id":%d,"fwd_messages":[],"important":false,"is_hidden":false,"peer_id":199640727,"random_id":0,"text":"Test message #%d"},"client_info":{"button_actions":["text","vkpay","open_app","location","open_link","callback","intent_subscribe","intent_unsubscribe"],"keyboard":true,"inline_keyboard":true,"carousel":true,"lang_id":0}}}`
|
||||
)
|
||||
|
||||
func init() {
|
||||
|
||||
}
|
||||
|
||||
func FloodHandler(c *gin.Context) {
|
||||
countStr := c.Query("count")
|
||||
if countStr == "" {
|
||||
c.String(http.StatusBadRequest, "Please specify the amount of requests in count query parameter")
|
||||
return
|
||||
}
|
||||
|
||||
count, err := strconv.Atoi(countStr)
|
||||
if err != nil || count <= 0 {
|
||||
c.String(http.StatusBadRequest, "Invalid count parameter value")
|
||||
return
|
||||
}
|
||||
|
||||
var sb strings.Builder
|
||||
sb.Grow(100 * count)
|
||||
for i := 0; i < count; i++ {
|
||||
now, st, err := performRequest()
|
||||
if err != nil {
|
||||
sb.WriteString(fmt.Sprintf("%d: cannot perform request: %s\n", now, err))
|
||||
continue
|
||||
}
|
||||
sb.WriteString(fmt.Sprintf("%d: received a response with code: %d\n", now, st))
|
||||
}
|
||||
|
||||
c.String(http.StatusOK, sb.String())
|
||||
}
|
||||
|
||||
func ConcurrentFloodHandler(c *gin.Context) {
|
||||
workersStr := c.Query("workers")
|
||||
if workersStr == "" {
|
||||
c.String(http.StatusBadRequest, "Please specify the amount of workers in workers query parameter")
|
||||
return
|
||||
}
|
||||
workers, err := strconv.Atoi(workersStr)
|
||||
if err != nil || workers <= 0 {
|
||||
c.String(http.StatusBadRequest, "Invalid workers parameter value")
|
||||
return
|
||||
}
|
||||
countStr := c.Query("count")
|
||||
if countStr == "" {
|
||||
c.String(http.StatusBadRequest, "Please specify the amount of requests per worker in the count query parameter")
|
||||
return
|
||||
}
|
||||
count, err := strconv.Atoi(countStr)
|
||||
if err != nil || workers <= 0 {
|
||||
c.String(http.StatusBadRequest, "Invalid count parameter value")
|
||||
return
|
||||
}
|
||||
|
||||
var (
|
||||
wg sync.WaitGroup
|
||||
sb strings.Builder
|
||||
sbLock sync.Mutex
|
||||
)
|
||||
sb.Grow(100 * count * workers)
|
||||
wg.Add(workers)
|
||||
for i := 0; i < workers; i++ {
|
||||
go func() {
|
||||
var workerSb strings.Builder
|
||||
workerSb.Grow(100 * count)
|
||||
for l := 0; l < count; l++ {
|
||||
now, st, err := performRequest()
|
||||
if err != nil {
|
||||
workerSb.WriteString(fmt.Sprintf("%d: cannot perform request: %s\n", now, err))
|
||||
continue
|
||||
}
|
||||
workerSb.WriteString(fmt.Sprintf("%d: received a response with code: %d\n", now, st))
|
||||
}
|
||||
defer sbLock.Unlock()
|
||||
sbLock.Lock()
|
||||
sb.WriteString(workerSb.String())
|
||||
wg.Done()
|
||||
}()
|
||||
}
|
||||
wg.Wait()
|
||||
c.String(http.StatusOK, sb.String())
|
||||
}
|
||||
|
||||
func performRequest() (int64, int, error) {
|
||||
now := time.Now().UnixNano()
|
||||
req, err := http.NewRequest(http.MethodPost, fmt.Sprintf("http://127.0.0.1:8000/vk/%s", vkToken), strings.NewReader(fmt.Sprintf(bodyTemplate, now, now, now, now, now)))
|
||||
if err != nil {
|
||||
return now, 0, err
|
||||
}
|
||||
|
||||
resp, err := http.DefaultClient.Do(req)
|
||||
if err != nil {
|
||||
return now, 0, err
|
||||
}
|
||||
|
||||
resp.Body.Close()
|
||||
return now, resp.StatusCode, nil
|
||||
}
|
||||
34
handler/mg.go
Normal file
34
handler/mg.go
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
package handler
|
||||
|
||||
import (
|
||||
"log"
|
||||
"net/http"
|
||||
"strings"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/gin-gonic/gin"
|
||||
v1 "github.com/retailcrm/mg-transport-api-client-go/v1"
|
||||
"vk-webhook-flooder-mock/dto"
|
||||
)
|
||||
|
||||
var totalUserless uint32 = 0
|
||||
|
||||
func NewMessageHandler(c *gin.Context) {
|
||||
var snd v1.SendData
|
||||
if err := c.ShouldBindJSON(&snd); err != nil {
|
||||
c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"errors": []string{err.Error()}})
|
||||
return
|
||||
}
|
||||
|
||||
if strings.HasPrefix(snd.Customer.Firstname, "User #") {
|
||||
total := atomic.AddUint32(&totalUserless, 1)
|
||||
log.Printf("MG NewMessageHandler: [%d] Beware! Message external_id=%s has placeholder user.",
|
||||
total, snd.Message.ExternalID)
|
||||
}
|
||||
|
||||
c.JSON(http.StatusOK, dto.MessagesResponse{
|
||||
MessageID: int(time.Now().UnixNano()),
|
||||
Time: time.Now(),
|
||||
})
|
||||
}
|
||||
51
handler/vk.go
Normal file
51
handler/vk.go
Normal file
|
|
@ -0,0 +1,51 @@
|
|||
package handler
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"log"
|
||||
"math/rand"
|
||||
"net/http"
|
||||
"strconv"
|
||||
"time"
|
||||
|
||||
"github.com/SevereCloud/vksdk/v2/api"
|
||||
"github.com/SevereCloud/vksdk/v2/object"
|
||||
"github.com/gin-gonic/gin"
|
||||
"vk-webhook-flooder-mock/dto"
|
||||
)
|
||||
|
||||
var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
|
||||
|
||||
func UsersGetHandler(c *gin.Context) {
|
||||
// Simulate real network latency + VK API latency.
|
||||
time.Sleep(time.Millisecond * time.Duration(rnd.Intn(150)+200))
|
||||
|
||||
var req dto.UsersGetRequest
|
||||
if err := c.ShouldBind(&req); err != nil {
|
||||
log.Printf("invalid users.get request: %s", err)
|
||||
c.String(http.StatusBadRequest, "Invalid request data")
|
||||
return
|
||||
}
|
||||
|
||||
val := api.UsersGetResponse{}
|
||||
for _, id := range req.UserIDs {
|
||||
uID, _ := strconv.Atoi(id)
|
||||
val = append(val, object.UsersUser{
|
||||
ID: uID,
|
||||
FirstName: "Mocked",
|
||||
LastName: fmt.Sprintf("Profile #%s", id),
|
||||
})
|
||||
}
|
||||
|
||||
data, err := json.Marshal(val)
|
||||
if err != nil {
|
||||
c.Error(err)
|
||||
return
|
||||
}
|
||||
|
||||
var res api.Response
|
||||
res.Response = data
|
||||
|
||||
c.JSON(http.StatusOK, res)
|
||||
}
|
||||
36
main.go
Normal file
36
main.go
Normal file
|
|
@ -0,0 +1,36 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"time"
|
||||
|
||||
"github.com/gin-gonic/gin"
|
||||
"vk-webhook-flooder-mock/handler"
|
||||
)
|
||||
|
||||
func main() {
|
||||
if len(os.Args) > 1 && os.Args[1] == "teststore" {
|
||||
f := newFetcher("token")
|
||||
go func() {
|
||||
for i := 0; i < 1000; i++ {
|
||||
f.Enqueue(int64(i))
|
||||
time.Sleep(time.Millisecond)
|
||||
}
|
||||
}()
|
||||
fmt.Printf("starting")
|
||||
for {
|
||||
fmt.Printf("\033[2K\roffload: %d, output: %d, result: %d", f.offload.Len(), len(f.output), f.result.Len())
|
||||
time.Sleep(time.Millisecond)
|
||||
}
|
||||
}
|
||||
|
||||
gin.SetMode(gin.ReleaseMode)
|
||||
g := gin.New()
|
||||
g.Use(gin.Recovery())
|
||||
g.GET("/flood", handler.FloodHandler)
|
||||
g.GET("/concurrentflood", handler.ConcurrentFloodHandler)
|
||||
g.POST("/method/users.get", vkRateLimit(), handler.UsersGetHandler)
|
||||
g.POST("/api/transport/v1/messages", mgRateLimit(), handler.NewMessageHandler)
|
||||
g.Run(":8090")
|
||||
}
|
||||
47
middleware.go
Normal file
47
middleware.go
Normal file
|
|
@ -0,0 +1,47 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
"net/http"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
ratelimit "github.com/JGLTechnologies/gin-rate-limit"
|
||||
"github.com/gin-gonic/gin"
|
||||
)
|
||||
|
||||
func mgRateLimit() gin.HandlerFunc {
|
||||
var totalLimited uint32
|
||||
store := ratelimit.InMemoryStore(&ratelimit.InMemoryOptions{
|
||||
Rate: time.Second,
|
||||
Limit: 50, // TODO: This must be changed to the 1000rps.
|
||||
})
|
||||
return ratelimit.RateLimiter(store, &ratelimit.Options{
|
||||
ErrorHandler: func(c *gin.Context, info ratelimit.Info) {
|
||||
cur := atomic.AddUint32(&totalLimited, 1)
|
||||
log.Printf("%s: [%d] rate limited > %t, will reset at %s\n", c.ClientIP(), cur, info.RateLimited, info.ResetTime)
|
||||
c.AbortWithStatus(http.StatusTooManyRequests)
|
||||
},
|
||||
KeyFunc: keyFunc,
|
||||
})
|
||||
}
|
||||
|
||||
func vkRateLimit() gin.HandlerFunc {
|
||||
var totalLimited uint32
|
||||
store := ratelimit.InMemoryStore(&ratelimit.InMemoryOptions{
|
||||
Rate: time.Second,
|
||||
Limit: 20,
|
||||
})
|
||||
return ratelimit.RateLimiter(store, &ratelimit.Options{
|
||||
ErrorHandler: func(c *gin.Context, info ratelimit.Info) {
|
||||
cur := atomic.AddUint32(&totalLimited, 1)
|
||||
log.Printf("%s: [%d] VK request rate limited > %t, will reset at %s\n", c.ClientIP(), cur, info.RateLimited, info.ResetTime)
|
||||
c.AbortWithStatus(http.StatusTooManyRequests)
|
||||
},
|
||||
KeyFunc: keyFunc,
|
||||
})
|
||||
}
|
||||
|
||||
func keyFunc(c *gin.Context) string {
|
||||
return c.ClientIP()
|
||||
}
|
||||
177
teststore.go
Normal file
177
teststore.go
Normal file
|
|
@ -0,0 +1,177 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"math/rand"
|
||||
"runtime"
|
||||
"strconv"
|
||||
"time"
|
||||
|
||||
"github.com/SevereCloud/vksdk/v2/object"
|
||||
"github.com/allegro/bigcache/v3"
|
||||
"go.uber.org/atomic"
|
||||
)
|
||||
|
||||
type UsersUser struct {
|
||||
ID int64
|
||||
}
|
||||
|
||||
var UserUpdateInterval = 24
|
||||
|
||||
const (
|
||||
maxUsersPerChannel = 50
|
||||
fetcherInterval = time.Millisecond
|
||||
fetcherBatchingInterval = time.Millisecond * 20
|
||||
)
|
||||
|
||||
type Fetcher interface {
|
||||
Enqueue(userID int64)
|
||||
WaitFor(userID int64, sleepBetweenAttempts time.Duration, attemptsCount int) UsersUser
|
||||
}
|
||||
|
||||
type fetcher struct {
|
||||
rnd *rand.Rand
|
||||
input chan int64
|
||||
offload *bigcache.BigCache
|
||||
output chan []int64
|
||||
result *bigcache.BigCache
|
||||
stop atomic.Bool
|
||||
token string
|
||||
}
|
||||
|
||||
func newFetcher(token string) *fetcher {
|
||||
input, _ := bigcache.New(context.Background(), bigcache.DefaultConfig(time.Minute*10))
|
||||
output, _ := bigcache.New(context.Background(), bigcache.DefaultConfig(time.Minute))
|
||||
uf := &fetcher{
|
||||
rnd: rand.New(rand.NewSource(time.Now().UnixNano())),
|
||||
input: make(chan int64, maxUsersPerChannel),
|
||||
output: make(chan []int64),
|
||||
offload: input,
|
||||
result: output,
|
||||
token: token,
|
||||
}
|
||||
runtime.SetFinalizer(uf, usersFetcherDestructor)
|
||||
go uf.consumeOffload()
|
||||
go uf.assembleBatches()
|
||||
go uf.doWork()
|
||||
return uf
|
||||
}
|
||||
|
||||
func usersFetcherDestructor(uf *fetcher) {
|
||||
uf.stop.Store(true)
|
||||
}
|
||||
|
||||
func (u *fetcher) Enqueue(userID int64) {
|
||||
if u.stop.Load() {
|
||||
return
|
||||
}
|
||||
if userID == 0 {
|
||||
return
|
||||
}
|
||||
if len(u.input) < 50 {
|
||||
u.input <- userID
|
||||
return
|
||||
}
|
||||
_ = u.offload.Set(strconv.FormatInt(userID, 10), []byte{})
|
||||
}
|
||||
|
||||
func (u *fetcher) WaitFor(userID int64, sleepBetweenAttempts time.Duration, attemptsCount int) object.UsersUser {
|
||||
attempt := 0
|
||||
uid := strconv.FormatInt(userID, 10)
|
||||
retryFetching:
|
||||
val, err := u.result.Get(uid)
|
||||
if err != nil {
|
||||
if errors.Is(err, bigcache.ErrEntryNotFound) {
|
||||
if attempt == attemptsCount {
|
||||
return object.UsersUser{}
|
||||
}
|
||||
time.Sleep(sleepBetweenAttempts)
|
||||
attempt++
|
||||
goto retryFetching
|
||||
}
|
||||
return object.UsersUser{}
|
||||
}
|
||||
|
||||
var user object.UsersUser
|
||||
if err := json.Unmarshal(val, &user); err != nil {
|
||||
return object.UsersUser{}
|
||||
}
|
||||
return user
|
||||
}
|
||||
|
||||
func (u *fetcher) consumeOffload() {
|
||||
for {
|
||||
if u.stop.Load() {
|
||||
break
|
||||
}
|
||||
it := u.offload.Iterator()
|
||||
for it.SetNext() {
|
||||
entry, err := it.Value()
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
uid, _ := strconv.ParseInt(entry.Key(), 10, 64)
|
||||
if uid == 0 {
|
||||
u.offload.Delete(entry.Key())
|
||||
continue
|
||||
}
|
||||
u.input <- uid
|
||||
u.offload.Delete(entry.Key())
|
||||
time.Sleep(fetcherInterval)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (u *fetcher) assembleBatches() {
|
||||
cnt := 0
|
||||
items := make([]int64, 50)
|
||||
for {
|
||||
if u.stop.Load() {
|
||||
break
|
||||
}
|
||||
|
||||
select {
|
||||
case item := <-u.input:
|
||||
items[cnt] = item
|
||||
cnt++
|
||||
if cnt == 50 {
|
||||
cnt = 0
|
||||
u.output <- items
|
||||
items = make([]int64, 50)
|
||||
continue
|
||||
}
|
||||
case <-time.After(fetcherBatchingInterval):
|
||||
if len(items) > 0 && items[0] != 0 {
|
||||
cnt = 0
|
||||
u.output <- items
|
||||
items = make([]int64, 50)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (u *fetcher) doWork() {
|
||||
defer func() {
|
||||
if r := recover(); r != nil {
|
||||
time.Sleep(fetcherInterval)
|
||||
go u.doWork()
|
||||
}
|
||||
}()
|
||||
|
||||
for batch := range u.output {
|
||||
time.Sleep(time.Millisecond * time.Duration(u.rnd.Intn(150)+200))
|
||||
|
||||
for _, user := range batch {
|
||||
data, err := json.Marshal(UsersUser{ID: user})
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
_ = u.result.Set(strconv.FormatInt(user, 10), data)
|
||||
}
|
||||
}
|
||||
|
||||
close(u.output)
|
||||
close(u.input)
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue