├── .gitignore ├── LICENSE ├── README.md ├── build-1.sh ├── build-2.sh ├── client └── main.go ├── common └── common.go ├── config.yml ├── go.mod ├── go.sum ├── server └── main.go └── static ├── css ├── bootstrap.css.map └── bootstrap.min.css ├── img └── img.gif ├── index.html └── js ├── bootstrap.min.js ├── index.js └── jquery.min.js /.gitignore: -------------------------------------------------------------------------------- 1 | .idea/ -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2020 atulkgupta9 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Requirements 2 | 1. File should be uploaded in chunks. Chunks can be uploaded in any order. File can be of any type. 3 | 2. Chunk size should be configurable. 4 | 3. There are multiple server instances running on different addresses. Each server knows about every other server. Chunk received on one server should be replicated to other servers so that each server can have the chunk. 5 | 4. Chunks received on servers should be stitched in correct order to maintain the integrity of the file. 6 | 7 | # Design Approach 8 | 1. Chunk size and a list of servers can be saved in some config file and this file will be read on application startup. 9 | 10 | 2. An http endpoint will be there to accept a chunk with additional information like offset, agent, total no of chunks that needs to be received, identifier corresponding to this particular file upload. 11 | 12 | 3. Once a server instance receives a chunk, it will distribute this chunk to other servers only if the agent is client. 13 | On receiving this chunk, server will 14 | 1. Write this chunk to the file with that identifier at the required offset. 15 | 2. Evaluate if all the chunks have been received. If yes it will return an appropriateg response. 16 | 17 | 18 | # To Run 19 | ## Run two build files in two terminals as follows: 20 | 1. ./build-1.sh 21 | 2. ./build-2.sh 22 | 23 | ## To Run from client specify the file to be uploaded in config.yml 24 | 1. cd client 25 | 2. go run main.go 26 | 27 | ## Curl to upload file 28 | curl --location --request POST '127.0.0.1:3001/file' \ 29 | --form 'file=@/home/use/filename' 30 | 31 | ## Dummy-UI 32 | a dummy ui to upload file can be accessed at : http://127.0.0.1:3001/index 33 | 34 | ### Sample upload using React 35 |  36 | -------------------------------------------------------------------------------- /build-1.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | cd server 4 | go build -o ../bigf 5 | cd .. && ./bigf 3001 -------------------------------------------------------------------------------- /build-2.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | cd server 4 | go build -o ../bigf 5 | cd .. && ./bigf 3002 -------------------------------------------------------------------------------- /client/main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "big-file-upload/common" 5 | "github.com/chilts/sid" 6 | "github.com/sirupsen/logrus" 7 | "os" 8 | ) 9 | 10 | func main() { 11 | appconfig := common.GetAppConfig() 12 | err := chunkWholeFile(appconfig) 13 | if err != nil { 14 | logrus.Error("Could not chunk file : ", appconfig.Chunk.Filename, err) 15 | panic(err) 16 | } 17 | } 18 | 19 | func chunkWholeFile(appconfig *common.AppConfig) error { 20 | file, err := os.Open(appconfig.Chunk.Filename) 21 | if err != nil { 22 | return err 23 | } 24 | defer file.Close() 25 | fileinfo, err := file.Stat() 26 | if err != nil { 27 | return err 28 | } 29 | iterations := fileinfo.Size() / appconfig.Chunk.Size 30 | fx := fileinfo.Name() + sid.Id() 31 | remainder := fileinfo.Size() % appconfig.Chunk.Size 32 | total := iterations 33 | if remainder != 0 { 34 | total = total + 1 35 | } 36 | for i := int64(0); i < iterations; i++ { 37 | buffer := make([]byte, appconfig.Chunk.Size) 38 | _, err = file.ReadAt(buffer, i*appconfig.Chunk.Size) 39 | if err != nil { 40 | return err 41 | } 42 | err = common.SendRequest(buffer, i*appconfig.Chunk.Size, i+1, fx, total) 43 | if err != nil { 44 | return err 45 | } 46 | } 47 | if remainder != 0 { 48 | buffer := make([]byte, remainder) 49 | _, err = file.ReadAt(buffer, iterations*appconfig.Chunk.Size) 50 | if err != nil { 51 | return err 52 | } 53 | err = common.SendRequest(buffer, iterations*appconfig.Chunk.Size, total, fx, total) 54 | if err != nil { 55 | return err 56 | } 57 | } 58 | return nil 59 | } 60 | -------------------------------------------------------------------------------- /common/common.go: -------------------------------------------------------------------------------- 1 | package common 2 | 3 | import ( 4 | "bytes" 5 | "github.com/sirupsen/logrus" 6 | "github.com/spf13/viper" 7 | "math/rand" 8 | "net/http" 9 | "strconv" 10 | "time" 11 | ) 12 | 13 | const GET_METHOD = "GET" 14 | 15 | const CHUNK_UPLOAD_ENDPOINT = "/upload/:id" 16 | const FILE_UPLOAD_ENDPOINT = "/file" 17 | 18 | const AGENT_CLIENT = "client" 19 | const AGENT_SERVER = "server" 20 | 21 | var appconfig = GetAppConfig() 22 | 23 | type AppConfig struct { 24 | Chunk Chunk 25 | Server Server 26 | } 27 | type Chunk struct { 28 | Size int64 29 | Filename string 30 | } 31 | type Server struct { 32 | Addr []string 33 | } 34 | 35 | func GetAppConfig() *AppConfig { 36 | var appConfig AppConfig 37 | viper.SetConfigName("config") 38 | viper.SetConfigType("yml") 39 | viper.AddConfigPath("..") 40 | if err := viper.ReadInConfig(); err != nil { 41 | logrus.Info("Error reading config file ", err) 42 | } 43 | err := viper.Unmarshal(&appConfig) 44 | if err != nil { 45 | logrus.Info("Unable to decode into struct ", err) 46 | } 47 | return &appConfig 48 | } 49 | 50 | func DoRequest(method, url, agent string, offset int64, body []byte) error { 51 | client := &http.Client{} 52 | req, err := http.NewRequest(method, url, bytes.NewReader(body)) 53 | if err != nil { 54 | return err 55 | } 56 | req.Header.Set("User-Agent", agent) 57 | req.Header.Set("offset", strconv.FormatInt(offset, 10)) 58 | res, err := client.Do(req) 59 | if err != nil { 60 | return err 61 | } 62 | defer res.Body.Close() 63 | return nil 64 | } 65 | 66 | func GetMeServerAdd() string { 67 | rand.Seed(time.Now().UnixNano()) 68 | return appconfig.Server.Addr[rand.Intn(len(appconfig.Server.Addr))] 69 | } 70 | 71 | func SendRequest(buffer []byte, offset int64, sequence int64, fx string, total int64) error { 72 | url := GetMeServerAdd() + CHUNK_UPLOAD_ENDPOINT + strconv.FormatInt(sequence, 10) + "?&filename=" + fx + "&total=" + strconv.FormatInt(total, 10) 73 | return DoRequest(GET_METHOD, url, AGENT_CLIENT, offset, buffer) 74 | } 75 | -------------------------------------------------------------------------------- /config.yml: -------------------------------------------------------------------------------- 1 | Chunk: 2 | Size: 1000000 3 | Filename: "/home/use/schoolcsv.csv" 4 | 5 | 6 | Server: 7 | Addr: 8 | - "http://127.0.0.1:3001" 9 | - "http://127.0.0.1:3002" 10 | 11 | 12 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/atulkgupta9/big-file-uploader 2 | 3 | go 1.13 4 | 5 | require ( 6 | github.com/chilts/sid v0.0.0-20190607042430-660e94789ec9 7 | github.com/julienschmidt/httprouter v1.3.0 8 | github.com/rs/cors v1.7.0 9 | github.com/sirupsen/logrus v1.4.2 10 | github.com/spf13/viper v1.7.0 11 | 12 | ) 13 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 2 | cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 3 | cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= 4 | cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= 5 | cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= 6 | cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= 7 | cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= 8 | cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= 9 | cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= 10 | 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h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU= 174 | go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU= 175 | go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8= 176 | go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE= 177 | go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0= 178 | go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q= 179 | golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4= 180 | golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4= 181 | golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= 182 | golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 183 | golang.org/x/crypto 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192 | golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU= 193 | golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= 194 | golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 195 | golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 196 | golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 197 | golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 198 | golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE= 199 | golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o= 200 | golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod 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golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 228 | golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 229 | golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 230 | golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 231 | golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 232 | golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 233 | golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 234 | golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 235 | golang.org/x/sys v0.0.0-20190422165155-953cdadca894 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google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= 273 | google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= 274 | google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0= 275 | google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= 276 | google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= 277 | google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= 278 | google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= 279 | google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= 280 | google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= 281 | google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= 282 | google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= 283 | google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= 284 | google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= 285 | google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= 286 | google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= 287 | gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw= 288 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 289 | gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 290 | gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= 291 | gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno= 292 | gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= 293 | gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo= 294 | gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74= 295 | gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 296 | gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I= 297 | gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 298 | honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 299 | honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 300 | honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 301 | honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= 302 | rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= 303 | -------------------------------------------------------------------------------- /server/main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "encoding/json" 5 | "github.com/atulkgupta9/big-file-uploader/common" 6 | "github.com/chilts/sid" 7 | "github.com/julienschmidt/httprouter" 8 | "github.com/rs/cors" 9 | "github.com/sirupsen/logrus" 10 | "html/template" 11 | "io/ioutil" 12 | "mime/multipart" 13 | "net/http" 14 | "os" 15 | "strconv" 16 | "sync" 17 | "time" 18 | ) 19 | 20 | type ResponseData struct { 21 | Message string `json:"res"` 22 | Filename string `json:"filename"` 23 | TimeTaken float64 `json:"time_taken"` 24 | FileSize int64 `json:"file_size"` 25 | } 26 | 27 | var config = common.GetAppConfig() 28 | 29 | func startServer(port string) { 30 | router := httprouter.New() 31 | router.GET(common.CHUNK_UPLOAD_ENDPOINT, handleChunkUpload) 32 | router.POST(common.FILE_UPLOAD_ENDPOINT, handleFileUpload) 33 | router.GET("/index", handleIndex) 34 | router.ServeFiles("/ui/*filepath", http.Dir("/home/use/GolandProjects/big-file-upload/static")) 35 | logrus.Info("Listening on port ", port) 36 | handler := cors.Default().Handler(router) 37 | logrus.Fatalln(http.ListenAndServe(":"+port, handler)) 38 | 39 | } 40 | 41 | func handleIndex(writer http.ResponseWriter, request *http.Request, params httprouter.Params) { 42 | t, err := template.ParseFiles("/home/use//GolandProjects/big-file-upload/static/index.html") 43 | if err != nil { 44 | logrus.Error("error serving file", err.Error()) 45 | panic(err) 46 | } 47 | t.Execute(writer, nil) 48 | } 49 | func handleFileUpload(rw http.ResponseWriter, req *http.Request, params httprouter.Params) { 50 | t1 := time.Now() 51 | file, header, err := req.FormFile("file") 52 | if err != nil { 53 | logrus.Error("could not read multipart file ", err) 54 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: "", Message: "could not upload file"}) 55 | return 56 | } 57 | defer file.Close() 58 | err = chunkAndSend(config, &file, header) 59 | if err != nil { 60 | logrus.Error("Could not chunk the file ", err) 61 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: "", Message: "could not upload file"}) 62 | return 63 | } 64 | filesize := header.Size / (1024 * 1024) 65 | timeTaken := time.Now().Sub(t1) 66 | logrus.Info("total time taken in serving request file size ", filesize, timeTaken) 67 | respondJson(rw, http.StatusOK, &ResponseData{Filename: header.Filename, Message: "successfully uploaded", TimeTaken: timeTaken.Seconds(), FileSize: filesize}) 68 | 69 | } 70 | 71 | /* 72 | sending all chunks concurrently using a buffered channel to limit maximum no of FileDescriptors, 73 | not using buffered channel and spawning thousands of goroutines caused "tcp too many open connections" 74 | 75 | */ 76 | func chunkAndSend(appconfig *common.AppConfig, file *multipart.File, header *multipart.FileHeader) error { 77 | filesize := header.Size 78 | iterations := filesize / appconfig.Chunk.Size 79 | fx := sid.IdBase64() + header.Filename 80 | remainder := filesize % appconfig.Chunk.Size 81 | total := iterations 82 | if remainder != 0 { 83 | total = total + 1 84 | } 85 | wg := sync.WaitGroup{} 86 | wg.Add(int(total)) 87 | //maximum we want to process 100 goroutines at once to hit server to upload chunk 88 | maxChan := make(chan bool, 100) 89 | for i := int64(0); i < iterations; i++ { 90 | //will be able to send only if there are less then equal to 100 entries in buffered channel 91 | //will be blocking if already 100 are there in channel waiting to process 92 | maxChan <- true 93 | go readAndSend(&wg, maxChan, appconfig.Chunk.Size, appconfig.Chunk.Size*i, i, total, file, fx) 94 | } 95 | if remainder != 0 { 96 | maxChan <- true 97 | go readAndSend(&wg, maxChan, remainder, appconfig.Chunk.Size*iterations, total, total, file, fx) 98 | } 99 | wg.Wait() 100 | return nil 101 | } 102 | 103 | func readAndSend(wg *sync.WaitGroup, maxChan chan bool, toReadBytes, offset, i, total int64, file *multipart.File, fx string) error { 104 | //freeing up buffer as execution of this method completes 105 | defer wg.Done() 106 | defer func(maxChan chan bool) { <-maxChan }(maxChan) 107 | toRead := make([]byte, toReadBytes) 108 | _, err := (*file).ReadAt(toRead, offset) 109 | if err != nil { 110 | return err 111 | } 112 | return common.SendRequest(toRead, offset, i+1, fx, total) 113 | } 114 | 115 | //this function is called by all the chunks which hit the endpoint handleChunkUpload 116 | func handleChunkUpload(rw http.ResponseWriter, req *http.Request, p httprouter.Params) { 117 | query := req.URL.Query() 118 | total, filename := query.Get("total"), query.Get("filename") 119 | agent := req.Header.Get("User-Agent") 120 | offset := req.Header.Get("offset") 121 | var file *os.File 122 | file, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, 0644) 123 | if err != nil { 124 | logrus.Error("Could not open a file", err) 125 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: filename, Message: "could not upload file"}) 126 | } 127 | defer file.Close() 128 | chunk, err := ioutil.ReadAll(req.Body) 129 | if err != nil { 130 | logrus.Error("Could not read request body") 131 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: filename, Message: "could not upload file"}) 132 | } 133 | defer req.Body.Close() 134 | off, err := strconv.ParseInt(offset, 10, 64) 135 | if err != nil { 136 | logrus.Error("Could not parse offset as integer in header") 137 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: filename, Message: "could not upload file"}) 138 | } 139 | _, err = file.WriteAt(chunk, off) 140 | if err != nil { 141 | logrus.Error("Could not write chunk at file") 142 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: filename, Message: "could not upload file"}) 143 | } 144 | if agent == common.AGENT_CLIENT { 145 | err := sendToAllOtherServers(config, req.RequestURI, off, chunk) 146 | if err != nil { 147 | logrus.Error("Could not send chunk to all servers") 148 | respondJson(rw, http.StatusInternalServerError, &ResponseData{Filename: "", Message: "could not upload file"}) 149 | } 150 | } 151 | if x := checkIfAllChunksReceived(total, p.ByName("id")); x { 152 | logrus.Info("All chunks received, fileId : ", filename) 153 | respondJson(rw, http.StatusOK, &ResponseData{Filename: filename, Message: "successfully uploaded"}) 154 | } 155 | } 156 | 157 | func sendToAllOtherServers(config *common.AppConfig, url string, offset int64, body []byte) error { 158 | wg := sync.WaitGroup{} 159 | wg.Add(len(config.Server.Addr)) 160 | defer wg.Wait() 161 | for i := 0; i < len(config.Server.Addr); i++ { 162 | url := config.Server.Addr[i] + url 163 | //sending across each server asynchronously 164 | go wrapDoRequest(&wg, url, offset, body) 165 | } 166 | return nil 167 | } 168 | 169 | func wrapDoRequest(wg *sync.WaitGroup, url string, offset int64, body []byte) error { 170 | defer wg.Done() 171 | return common.DoRequest(common.GET_METHOD, url, common.AGENT_SERVER, offset, body) 172 | } 173 | 174 | func checkIfAllChunksReceived(total string, id string) bool { 175 | return id == total 176 | } 177 | 178 | func respondJson(w http.ResponseWriter, status int, payload interface{}) { 179 | response, err := json.Marshal(payload) 180 | if err != nil { 181 | w.WriteHeader(http.StatusInternalServerError) 182 | w.Write([]byte(err.Error())) 183 | return 184 | } 185 | w.Header().Set("Content-Type", "application/json") 186 | w.WriteHeader(status) 187 | w.Write(response) 188 | } 189 | 190 | func main() { 191 | initializeLogger() 192 | startServerAny() 193 | } 194 | 195 | func startServerAny() { 196 | if len(os.Args) < 2 { 197 | startServer("3001") 198 | return 199 | } 200 | startServer(os.Args[1]) 201 | } 202 | 203 | func initializeLogger() { 204 | customFormatter := new(logrus.TextFormatter) 205 | customFormatter.TimestampFormat = "2020-06-04 15:04:05" 206 | logrus.SetFormatter(customFormatter) 207 | logrus.SetReportCaller(true) 208 | customFormatter.FullTimestamp = true 209 | } 210 | -------------------------------------------------------------------------------- /static/img/img.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/atulkgupta9/big-file-uploader/ba3c01561dfad49c97e75ad46a1f6679c5f1a517/static/img/img.gif -------------------------------------------------------------------------------- /static/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 |
5 | 6 | 7 | 8 | 9 |t |