├── .gitattributes ├── .gitignore ├── LICENSE ├── ShortLink App Plan.pdf ├── architecture.md ├── favicon.ico ├── go.mod ├── go.sum ├── handler └── handler.go ├── helper ├── constant.go └── functions.go ├── main.go ├── readme.md └── rest.http /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /vendor 2 | /db/badger 3 | /db/pogreb -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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Useful to run on region based deployment 21 | 22 | - Each machine has ID hard coded in the constant variable or we can also get one from 'os.Getenv("MachineID")' 23 | - Runing multiple instance of server with different Machine ID 24 | - Each Instance has their own DB file with unique identifier for "unique id" with value of "Machine ID" 25 | - When "Analytics" fetch, check uniqueID - Machine ID value and then communicating with the "Fetched" machine server. -------------------------------------------------------------------------------- /favicon.ico: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/go-awesome/shortlink/9dd9c43e4fce7f861fcb2d972f482e83b7a7a068/favicon.ico -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/go-awesome/shortlink 2 | 3 | go 1.14 4 | 5 | require ( 6 | github.com/akrylysov/pogreb v0.10.1 7 | github.com/dgraph-io/badger/v3 v3.2011.1 8 | github.com/gofiber/fiber/v2 v2.52.5 9 | github.com/rs/xid v1.3.0 10 | github.com/speps/go-hashids/v2 v2.0.1 11 | ) 12 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 2 | github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 3 | github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM= 4 | github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo= 5 | github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE= 6 | github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= 7 | github.com/akrylysov/pogreb v0.10.1 h1:FqlR8VR7uCbJdfUob916tPM+idpKgeESDXOA1K0DK4w= 8 | 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golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= 157 | golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= 158 | golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 159 | golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 160 | golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 161 | golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 162 | golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 163 | golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 164 | golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 165 | golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 166 | golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 167 | golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 168 | golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 169 | golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 170 | golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 171 | golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 172 | golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 173 | golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 174 | golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 175 | golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= 176 | golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc= 177 | golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= 178 | golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= 179 | golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8= 180 | golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA= 181 | golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k= 182 | golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo= 183 | golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U= 184 | golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= 185 | golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= 186 | golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ= 187 | golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8= 188 | golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8= 189 | golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8= 190 | golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE= 191 | golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= 192 | golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= 193 | golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY= 194 | golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= 195 | golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= 196 | golang.org/x/tools v0.0.0-20191127201027-ecd32218bd7f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= 197 | golang.org/x/tools v0.0.0-20201105001634-bc3cf281b174/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= 198 | golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc= 199 | golang.org/x/tools v0.4.0/go.mod h1:UE5sM2OK9E/d67R0ANs2xJizIymRP5gJU295PvKXxjQ= 200 | golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU= 201 | golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 202 | golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 203 | golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= 204 | google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= 205 | google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= 206 | google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= 207 | google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= 208 | google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= 209 | google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= 210 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 211 | gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= 212 | gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 213 | gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 214 | gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= 215 | gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 216 | honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 217 | rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= 218 | -------------------------------------------------------------------------------- /handler/handler.go: -------------------------------------------------------------------------------- 1 | package handler 2 | 3 | import ( 4 | "encoding/json" 5 | "strconv" 6 | "strings" 7 | "time" 8 | 9 | "github.com/go-awesome/shortlink/helper" 10 | 11 | "github.com/akrylysov/pogreb" 12 | "github.com/dgraph-io/badger/v3" 13 | "github.com/gofiber/fiber/v2" 14 | "github.com/rs/xid" 15 | ) 16 | 17 | func IndexHandler(c *fiber.Ctx) error { 18 | return c.JSON(fiber.Map{"node": helper.NodeID, "message": "Short URL Service Provider"}) 19 | } 20 | 21 | func CreateHandler(n int, bdb *badger.DB, db *pogreb.DB) fiber.Handler { 22 | return func(c *fiber.Ctx) error { 23 | post := new(helper.CreateURL) 24 | if err := c.BodyParser(&post); err != nil { 25 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.CO101)}) 26 | } 27 | // should do better URL validation here 28 | if !helper.ValidateURL(post.URL) { 29 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": "Invalid URL | Minimum URL Length should be 5"}) 30 | } 31 | // Get the API Token from Authorization Bearer Header 32 | token := helper.ParseToken(c.Get("Authorization")) 33 | 34 | // Basic Checking without Real time API Token checking 35 | if len(token) != helper.APITokenLength { 36 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(helper.ID103, helper.ID103)}) 37 | } 38 | msgTime := time.Now().Format("2006-01-02-15:04:05") 39 | // Create MD5 Hash of URL 40 | md5URL := helper.CreateMD5Hash(post.URL) 41 | // Check if user already has the URL 42 | val, err := helper.FindBDB([]byte(token+"-"+md5URL), bdb) 43 | if err == nil { 44 | return c.JSON(fiber.Map{"error": "false", "message": val}) 45 | } 46 | // Checking increment of N variable for new ShortID Token 47 | if n == 1 { 48 | num, err := helper.FindBDB([]byte("lastID"), bdb) 49 | if err != nil && err.Error() == "Key not found" { 50 | // do nothing as it is first entry 51 | } else if err != nil && err.Error() != "Key not found" { 52 | return c.Status(400).JSON(fiber.Map{"error": "true", "Message": helper.ErrorPrint(err.Error(), helper.ID101)}) 53 | } else { 54 | byteToInt, err := strconv.Atoi(num) 55 | if err != nil { 56 | return c.Status(400).JSON(fiber.Map{"error": "true", "Message": helper.ErrorPrint(err.Error(), helper.ID102)}) 57 | } 58 | if byteToInt > 1 { 59 | n = byteToInt + 1 60 | } 61 | } 62 | } 63 | 64 | // Generate Short Token ID for given index n 65 | shortID, err := helper.GenerateToken(token, n) 66 | if err != nil { 67 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 68 | } 69 | 70 | // json for storage 71 | jstore, err := json.Marshal(fiber.Map{"createdAt": msgTime, "shortURL": helper.Domain + shortID, "longURL": post.URL}) 72 | if err != nil { 73 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 74 | } 75 | /** 76 | * Now Create 2 KEY "API+md of URL" and "shortID" 77 | * One key will be used to populate list of all URL done by API Holder 78 | * Second key will be for redirect 79 | */ 80 | // Stored in Pogreb Database 81 | err = helper.PutDB([]byte(shortID), []byte(post.URL), nil, db) 82 | if err != nil { 83 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 84 | } 85 | 86 | // Stored in Badger Database 87 | err = helper.PutBDB([]byte(token+"-"+md5URL), jstore, nil, bdb) 88 | if err != nil { 89 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 90 | } 91 | // Increment the last ID and update the database 92 | err = helper.PutBDB([]byte("lastID"), []byte(strconv.Itoa(n)), []byte(token+"-"+md5URL), bdb) 93 | if err != nil { 94 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 95 | } 96 | n++ 97 | return c.JSON(fiber.Map{"error": "false", "message": string(jstore)}) 98 | } 99 | } 100 | 101 | func FetchAllHandler(bdb *badger.DB, db *pogreb.DB) fiber.Handler { 102 | return func(c *fiber.Ctx) error { 103 | token := helper.ParseToken(c.Get("Authorization")) 104 | // Basic Checking without Real time API Token checking 105 | if len(token) != helper.APITokenLength { 106 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ID103}) 107 | } 108 | skey := make([]string, 0) 109 | bdb.View(func(txn *badger.Txn) error { 110 | it := txn.NewIterator(badger.DefaultIteratorOptions) 111 | defer it.Close() 112 | prefix := []byte(token + "-") 113 | for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() { 114 | item := it.Item() 115 | // k := item.Key() 116 | err := item.Value(func(v []byte) error { 117 | skey = append(skey, string(v)) 118 | return nil 119 | }) 120 | if err != nil { 121 | return err 122 | } 123 | } 124 | return nil 125 | }) 126 | jstore, _ := json.Marshal(skey) 127 | return c.JSON(fiber.Map{"error": "false", "message": string(jstore)}) 128 | } 129 | } 130 | 131 | func UpdateHandler(bdb *badger.DB, db *pogreb.DB) fiber.Handler { 132 | return func(c *fiber.Ctx) error { 133 | post := new(helper.UpdateURL) 134 | if err := c.BodyParser(&post); err != nil { 135 | return c.Status(400).Send([]byte(err.Error())) 136 | } 137 | if !helper.ValidateURL(post.NURL) { 138 | return c.JSON(fiber.Map{"error": "true", "message": "Invalid New URL"}) 139 | } 140 | // Get the API Token from Authorization Bearer Header 141 | token := helper.ParseToken(c.Get("Authorization")) 142 | 143 | // Basic Checking without Real time API Token checking 144 | if len(token) != helper.APITokenLength { 145 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(helper.ID103, helper.ID103)}) 146 | } 147 | md5URL := helper.CreateMD5Hash(post.OURL) 148 | // Check if user already has the URL 149 | oldVal, err := helper.FindBDB([]byte(token+"-"+md5URL), bdb) 150 | if err != nil { 151 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID108)}) 152 | } 153 | 154 | val, err := helper.FindDB([]byte(post.ShortID), db) 155 | if err != nil { 156 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID105)}) 157 | } 158 | if val != post.OURL { 159 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(helper.ID103, helper.ID108)}) 160 | } 161 | 162 | Newmd5URL := helper.CreateMD5Hash(post.NURL) 163 | // Check if user already has the URL 164 | _, err = helper.FindBDB([]byte(token+"-"+Newmd5URL), bdb) 165 | if err == nil { 166 | return c.JSON(fiber.Map{"error": "true", "message": helper.ID109}) 167 | } 168 | // Update OLD Database 169 | err = helper.PutBDB([]byte(token+"-"+Newmd5URL), []byte(oldVal), []byte(token+"-"+md5URL), bdb) 170 | if err != nil { 171 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 172 | } 173 | // Update New Redirect 174 | err = helper.PutDB([]byte(post.ShortID), []byte(post.NURL), nil, db) 175 | if err != nil { 176 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID104)}) 177 | } 178 | 179 | return c.JSON(fiber.Map{"error": "false", "message": "Successfully Updated"}) 180 | } 181 | } 182 | 183 | func FetchSingleHandler(bdb *badger.DB, db *pogreb.DB) fiber.Handler { 184 | return func(c *fiber.Ctx) error { 185 | code := c.Params("code") 186 | code = strings.Replace(code, "%7C", "|", -1) 187 | if len(code) > helper.ShortIDToken { 188 | token := helper.ParseToken(c.Get("Authorization")) 189 | // Basic Checking without Real time API Token checking 190 | if len(token) != helper.APITokenLength { 191 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ID103}) 192 | } 193 | val, err := helper.FindDB([]byte(code), db) 194 | if err != nil { 195 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID105)}) 196 | } 197 | traffic := make(map[string]int) 198 | table := make(map[string]string) 199 | bdb.View(func(txn *badger.Txn) error { 200 | opts := badger.DefaultIteratorOptions 201 | opts.PrefetchValues = false 202 | it := txn.NewIterator(opts) 203 | defer it.Close() 204 | prefix := []byte(code + "-") 205 | for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() { 206 | item := it.Item() 207 | k := item.Key() 208 | split := strings.Split(string(k), "-|-") 209 | if len(split) == 3 { 210 | if _, present := traffic["total"]; !present { 211 | traffic["total"] = 1 212 | } else { 213 | traffic["total"] += 1 214 | } 215 | timer := strings.Split(split[2], "-") 216 | if _, present := table[split[1]]; !present { 217 | table[split[1]] = "done" 218 | traffic["unique"] += 1 219 | if _, present := traffic["unique-"+timer[0]+"-"+timer[1]+"-"+timer[2]]; !present { 220 | traffic["unique-"+timer[0]+"-"+timer[1]+"-"+timer[2]] = 1 221 | } else { 222 | traffic["unique-"+timer[0]+"-"+timer[1]+"-"+timer[2]] += 1 223 | } 224 | } 225 | if _, present := traffic[timer[0]+"-"+timer[1]+"-"+timer[2]]; !present { 226 | traffic[timer[0]+"-"+timer[1]+"-"+timer[2]] = 1 227 | } else { 228 | traffic[timer[0]+"-"+timer[1]+"-"+timer[2]] += 1 229 | } 230 | } 231 | } 232 | return nil 233 | }) 234 | return c.JSON(fiber.Map{"error": "false", "message": traffic, "longurl": val}) 235 | } 236 | return c.JSON(fiber.Map{"error": "true", "message": "Invalid Short Code Length"}) 237 | } 238 | } 239 | 240 | func DeleteHandler(bdb *badger.DB, db *pogreb.DB) fiber.Handler { 241 | return func(c *fiber.Ctx) error { 242 | post := new(helper.DeleteURL) 243 | if err := c.BodyParser(&post); err != nil { 244 | return c.Status(400).Send([]byte(err.Error())) 245 | } 246 | if !helper.ValidateURL(post.URL) { 247 | return c.JSON(fiber.Map{"error": "true", "message": "Invalid URL"}) 248 | } 249 | // Get the API Token from Authorization Bearer Header 250 | token := helper.ParseToken(c.Get("Authorization")) 251 | 252 | // Basic Checking without Real time API Token checking 253 | if len(token) != helper.APITokenLength { 254 | return c.Status(400).JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(helper.ID103, helper.ID103)}) 255 | } 256 | md5URL := helper.CreateMD5Hash(post.URL) 257 | // Check if user already has the URL 258 | _, err := helper.FindBDB([]byte(token+"-"+md5URL), bdb) 259 | if err != nil { 260 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID107)}) 261 | } 262 | // check the shortID, avoid delete wrong link. 263 | if len(post.ShortID) > helper.ShortIDToken { 264 | code := strings.Replace(post.ShortID, "%7C", "|", -1) 265 | val, err := helper.FindDB([]byte(code), db) 266 | if err != nil { 267 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID107)}) 268 | } 269 | if val != post.URL { 270 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(helper.ID107, helper.ID107)}) 271 | } 272 | } 273 | // delete short URL 274 | err = db.Delete([]byte(post.ShortID)) 275 | if err != nil { 276 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID107)}) 277 | } 278 | // delete "token-md5url" + "analytics" data 279 | err = bdb.Update(func(txn *badger.Txn) error { 280 | err = txn.Delete([]byte(token + "-" + md5URL)) 281 | it := txn.NewIterator(badger.DefaultIteratorOptions) 282 | defer it.Close() 283 | prefix := []byte(post.ShortID + "-") 284 | for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() { 285 | item := it.Item() 286 | k := item.Key() 287 | txn.Delete(k) 288 | } 289 | return err 290 | }) 291 | if err != nil { 292 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID107)}) 293 | } 294 | return c.JSON(fiber.Map{"error": "false", "message": "Successfully deleted"}) 295 | } 296 | } 297 | 298 | func RedirectToMeWebsite(db *pogreb.DB, bdb *badger.DB) fiber.Handler { 299 | return func(c *fiber.Ctx) error { 300 | msgTime := time.Now().Format("2006-01-02-15:04:05") 301 | code := c.Params("code") 302 | if len(code) > helper.ShortIDToken { 303 | code = strings.Replace(code, "%7C", "|", -1) 304 | val, err := helper.FindDB([]byte(code), db) 305 | if err != nil { 306 | return c.JSON(fiber.Map{"error": "true", "message": helper.ErrorPrint(err.Error(), helper.ID105)}) 307 | } 308 | if !helper.ValidateURL(val) { 309 | return c.JSON(fiber.Map{"error": "true", "message": helper.ID106}) 310 | } 311 | // Do Cookie Way + IP Way 312 | getCookie := c.Cookies(helper.CookieName, "no") 313 | if len(getCookie) > 2 { 314 | checkIfExist := helper.CheckBDB([]byte(code+"-|-"+getCookie+"-|-"), bdb) 315 | if !checkIfExist { 316 | guid := xid.New() 317 | getCookie = guid.String() 318 | c.Cookie(&fiber.Cookie{ 319 | Name: helper.CookieName, 320 | Value: getCookie, 321 | Expires: time.Now().Add(365 * 24 * time.Hour), 322 | HTTPOnly: true, 323 | SameSite: "strict", 324 | }) 325 | } 326 | go helper.PutBDB([]byte(code+"-|-"+getCookie+"-|-"+msgTime), nil, nil, bdb) 327 | } else { 328 | guid := xid.New() 329 | cookieToken := guid.String() 330 | c.Cookie(&fiber.Cookie{ 331 | Name: helper.CookieName, 332 | Value: cookieToken, 333 | Expires: time.Now().Add(365 * 24 * time.Hour), 334 | HTTPOnly: true, 335 | SameSite: "strict", 336 | }) 337 | // when we will be spliting the string with "|", we will have node,code,ip,date 338 | go helper.PutBDB([]byte(code+"-|-"+cookieToken+"-|-"+msgTime), nil, nil, bdb) 339 | } 340 | return c.Redirect(val) 341 | } 342 | return c.JSON(fiber.Map{"error": "true", "message": helper.ID106}) 343 | } 344 | } 345 | -------------------------------------------------------------------------------- /helper/constant.go: -------------------------------------------------------------------------------- 1 | package helper 2 | 3 | const ( 4 | Production = 2 // Please set to 1 if in production. 5 | Domain = "https://lin.ks/" 6 | CookieName = "lin.ks" 7 | NodeID = "N1|" // Increase per node by value as "N2|", "N3|"... for multiple node 8 | DBFolder = "/home/ubuntu/go/src/shortlink/db" // Without trailing slash at the end. 9 | AddFromToken = 3 // firt N character to get from token and use it in ShortID 10 | ShortIDToken = 7 // Further added from 1st N char of AddFromToken+NodeID: total=12 11 | APITokenLength = 32 12 | BypassLockGuard = false // set to true if DB is read from multiple instance. 13 | DB101 = "Failed to Load Read-Heavy database, Please try again!" 14 | DB102 = "Failed to Load Write-Heavy database, Please try again!" 15 | CO101 = "Error CO101: Something went wrong! Please try again!" 16 | ID101 = "Error ID101: Can not create" 17 | ID102 = "Error ID102: Can not create due to Numbher issue" 18 | ID103 = "Error ID103: Authorization Token Missing" 19 | ID104 = "Error ID104: Failed to generate Short ID, Please try again!" 20 | ID105 = "Error ID105: Can't fetch Short URL" 21 | ID106 = "Error ID106: Invalid Short URL" 22 | ID107 = "Error ID107: Failed to Delete, Please try again" 23 | ID108 = "Error ID108: Invalid Old Long URL" 24 | ID109 = "Error ID109: Provided Long URL already exists in your Account" 25 | ) 26 | -------------------------------------------------------------------------------- /helper/functions.go: -------------------------------------------------------------------------------- 1 | package helper 2 | 3 | import ( 4 | "crypto/md5" 5 | "encoding/hex" 6 | vurl "net/url" 7 | "strings" 8 | 9 | "github.com/akrylysov/pogreb" 10 | "github.com/dgraph-io/badger/v3" 11 | "github.com/speps/go-hashids/v2" 12 | ) 13 | 14 | // CreateURL 15 | type CreateURL struct { 16 | URL string `json:"url"` 17 | } 18 | 19 | // DeleteURL - Delete 20 | type DeleteURL struct { 21 | URL string `json:"long"` 22 | ShortID string `json:"short"` 23 | } 24 | 25 | // UpdateURL - Delete 26 | type UpdateURL struct { 27 | OURL string `json:"old"` 28 | NURL string `json:"new"` 29 | ShortID string `json:"short"` 30 | } 31 | 32 | // Ips 33 | func IPs(ips []string) string { 34 | return strings.Join(ips, "-") 35 | } 36 | 37 | // validateURL is basic and not 100% correct validate URL, but this can be starting place... 38 | func ValidateURL(url string) bool { 39 | if len(url) < 5 { 40 | return false 41 | } 42 | if _, err := vurl.ParseRequestURI(url); err != nil { 43 | return false 44 | } 45 | return true 46 | } 47 | 48 | // createMD5Hash md5 hash the URL 49 | func CreateMD5Hash(text string) string { 50 | hash := md5.Sum([]byte(text)) 51 | return hex.EncodeToString(hash[:]) 52 | } 53 | 54 | // generateToken generates uniqiue Token 55 | func GenerateToken(salt string, num int) (string, error) { 56 | hd := hashids.NewData() 57 | hd.Salt = salt 58 | hd.Alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" 59 | hd.MinLength = ShortIDToken 60 | h, err := hashids.NewWithData(hd) 61 | if err != nil { 62 | return "", err 63 | } 64 | e, err := h.Encode([]int{num}) 65 | if err != nil { 66 | return "", err 67 | } 68 | shortID := NodeID + string(salt[0:AddFromToken]) + e 69 | return shortID, nil 70 | } 71 | 72 | // errorPrint based on development or production server 73 | func ErrorPrint(devError string, prodError string) string { 74 | if Production == 1 { 75 | return prodError 76 | } 77 | return devError 78 | } 79 | 80 | // findDB is to get the key & value from badger database 81 | func FindDB(key []byte, db *pogreb.DB) (string, error) { 82 | // get the value from pogreb database 83 | val, err := db.Get(key) 84 | if err != nil { 85 | return "", err 86 | } 87 | return string(val), nil 88 | } 89 | 90 | // putDB is to store key & value in badger database 91 | func PutDB(key []byte, value []byte, ifDelete []byte, db *pogreb.DB) error { 92 | // save the value to pogreb database 93 | err := db.Put(key, value) 94 | if err != nil { 95 | if ifDelete != nil { 96 | // delete It if there is an error in saving record 97 | db.Delete(ifDelete) 98 | } 99 | return err 100 | } 101 | return nil 102 | } 103 | 104 | // findBDB is to get the key & value from badger database 105 | func FindBDB(key []byte, bdb *badger.DB) (string, error) { 106 | var valCopy []byte 107 | err := bdb.View(func(txn *badger.Txn) error { 108 | item, err := txn.Get(key) 109 | if err != nil { 110 | return err 111 | } else { 112 | valCopy, err = item.ValueCopy(nil) 113 | if err != nil { 114 | return err 115 | } 116 | } 117 | return nil 118 | }) 119 | if err != nil { 120 | return "", err 121 | } 122 | return string(valCopy), nil 123 | } 124 | 125 | // CheckBDB is to get the key & value from badger database 126 | func CheckBDB(key []byte, bdb *badger.DB) bool { 127 | skey := make([]string, 0) 128 | err := bdb.View(func(txn *badger.Txn) error { 129 | opts := badger.DefaultIteratorOptions 130 | opts.PrefetchValues = false 131 | it := txn.NewIterator(opts) 132 | defer it.Close() 133 | prefix := key 134 | for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() { 135 | item := it.Item() 136 | k := item.Key() 137 | skey = append(skey, string(k)) 138 | if len(skey) >= 1 { 139 | break 140 | } 141 | } 142 | return nil 143 | }) 144 | if err != nil { 145 | return false 146 | } 147 | if len(skey) >= 1 { 148 | return true 149 | } else { 150 | return false 151 | } 152 | } 153 | 154 | // putBDB is to store key & value in badger database 155 | func PutBDB(key []byte, value []byte, ifDelete []byte, bdb *badger.DB) error { 156 | err := bdb.Update(func(txn *badger.Txn) error { 157 | err := txn.Set(key, value) 158 | if err != nil { 159 | if ifDelete != nil { 160 | txn.Delete(ifDelete) 161 | } 162 | } 163 | return err 164 | }) 165 | if err != nil { 166 | return err 167 | } 168 | return nil 169 | } 170 | 171 | // parseToken - Parse Token from Authorization Header and get the Token 172 | func ParseToken(authToken string) string { 173 | if authToken == "" { 174 | return "" 175 | } 176 | bearer := strings.Split(authToken, "Bearer ") 177 | if len(bearer) != 2 { 178 | return "" 179 | } 180 | token := strings.TrimSpace(bearer[1]) 181 | if len(token) < 1 { 182 | return "" 183 | } 184 | return token 185 | } 186 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "log" 5 | "os" 6 | "os/signal" 7 | "runtime" 8 | "time" 9 | 10 | "github.com/go-awesome/shortlink/handler" 11 | "github.com/go-awesome/shortlink/helper" 12 | 13 | "github.com/akrylysov/pogreb" 14 | badger "github.com/dgraph-io/badger/v3" 15 | "github.com/gofiber/fiber/v2" 16 | "github.com/gofiber/fiber/v2/middleware/favicon" 17 | "github.com/gofiber/fiber/v2/middleware/recover" 18 | ) 19 | 20 | func main() { 21 | runtime.GOMAXPROCS(runtime.NumCPU()) 22 | 23 | db, err := pogreb.Open(helper.DBFolder+"/pogreb/url.db", nil) 24 | if err != nil { 25 | log.Fatal(helper.ErrorPrint(err.Error(), helper.DB101)) 26 | return 27 | } 28 | defer db.Close() 29 | opts := badger.DefaultOptions(helper.DBFolder + "/badger") 30 | opts.NumVersionsToKeep = 1 31 | opts.ReadOnly = false 32 | 33 | if helper.BypassLockGuard { 34 | // When uisng centralized DB server, it will be read from many and write to 1 node. 35 | opts.BypassLockGuard = true 36 | } 37 | 38 | // Open badger Database 39 | bdb, err := badger.Open(opts) 40 | if err != nil { 41 | log.Fatal(helper.ErrorPrint(err.Error(), helper.DB102)) 42 | } 43 | defer bdb.Close() 44 | 45 | var n int = 1 46 | 47 | // Start the Gofiber APP 48 | app := fiber.New(fiber.Config{ 49 | ReadTimeout: 10 * time.Minute, 50 | WriteTimeout: 5 * time.Minute, 51 | Prefork: false, 52 | CaseSensitive: false, 53 | StrictRouting: true, 54 | DisableStartupMessage: true, 55 | ErrorHandler: func(c *fiber.Ctx, err error) error { 56 | code := fiber.StatusInternalServerError 57 | if e, ok := err.(*fiber.Error); ok { 58 | code = e.Code 59 | } 60 | return c.Status(code).JSON(fiber.Map{"error": "true", "Message": helper.ErrorPrint(err.Error(), helper.CO101)}) 61 | }, 62 | }) 63 | app.Use(recover.New(), favicon.New(favicon.Config{ 64 | File: "./favicon.ico", 65 | })) 66 | 67 | // Close the server and database on interruptor 68 | go func() { 69 | interruptor := make(chan os.Signal, 1) 70 | signal.Notify(interruptor, os.Interrupt) 71 | for range interruptor { 72 | app.Shutdown() 73 | db.Close() 74 | bdb.Close() 75 | os.Exit(1) 76 | } 77 | }() 78 | 79 | /** 80 | * fetch a short ID and redirect 81 | * @param `shortURL` from URL 82 | * @action also store analytics of the URL 83 | * @return redirect 84 | **/ 85 | 86 | api := app.Group("/api") 87 | 88 | // IndexHandler 89 | api.Get("/", handler.IndexHandler) 90 | 91 | /** 92 | * Store a new Long URL in storage. 93 | * @param `url` from JSON 94 | * @action generate unique short ID, increment n, store short id. 95 | * @return json response with error and successful message 96 | **/ 97 | 98 | api.Post("/create", handler.CreateHandler(n, bdb, db)) 99 | 100 | /** 101 | * Update a Long URL in storage. 102 | * @param `url` from JSON & Authorization token from Header 103 | * @action update database for long URL 104 | * @return json response with error and successful message 105 | */ 106 | 107 | api.Post("/update", handler.UpdateHandler(bdb, db)) 108 | 109 | /** 110 | * Fetch a list of Long URL in storage for the API Holder. 111 | * @param `Authorization Token` from Header 112 | * @action fetch entry list from database 113 | * @return json response with error and successful message with list 114 | */ 115 | 116 | api.Get("/fetch", handler.FetchAllHandler(bdb, db)) 117 | 118 | /** 119 | * Fetch detail analytics in storage by the API holder 120 | * @param `ShortID` from URL 121 | * @action fetch all entry from database 122 | * @return json response with error and successful message 123 | **/ 124 | 125 | api.Get("/fetch/:code", handler.FetchSingleHandler(bdb, db)) 126 | 127 | /** 128 | * Delete a Long URL in storage by the API holder 129 | * @param `helper.DeleteURL struct` from JSON 130 | * @action delete entry from database 131 | * @return json response with error and successful message 132 | **/ 133 | api.Post("/delete", handler.DeleteHandler(bdb, db)) 134 | 135 | app.Get("/:code", handler.RedirectToMeWebsite(db, bdb)) 136 | 137 | // run the server... 138 | app.Listen(":8080") 139 | } 140 | -------------------------------------------------------------------------------- /readme.md: -------------------------------------------------------------------------------- 1 | ## About The Project 2 | 3 |

4 | 5 | Shortlink App in Golang 6 | 7 | * Multiple Node based Architecture to create and scale at ease 8 | * Highly performant key-value storage system 9 | * Centralized Storage option when multiple node created - requires tweaking. 10 | * **API auth system not built**. Left for using it for your own use case like `JWT` or `paseto`. Self Implement. 11 | 12 | Please see the `architecture` file in the repository on option you can use the app. For some minor tweaking may be required. 13 | 14 | ### Built With 15 | 16 | List of Library and Framework used in building the app: 17 | 18 | * [Gofiber](https://gofiber.io) 19 | * [BadgerDB](https://github.com/dgraph-io/badger) 20 | * [PogrebDB](https://github.com/akrylysov/pogreb) 21 | * [hashid](https://github.com/go-awesome/shortlink/blob/main/helper/functions.go#L11) 22 | * [xid](https://github.com/go-awesome/shortlink/blob/main/handler/handler.go#L13) 23 | 24 | 25 | 26 | ## Getting Started 27 | 28 | Just download and run `go run main.go` and you are ready to go. 29 | To deploy to server, prefer [DigitalOcean](https://m.do.co/c/5b28c38da55b) 30 | 31 | ### Steps 32 | 33 | Common Steps to Launch: 34 | 35 | ```sh 36 | go mod tidy 37 | go mod vendor 38 | go run main.go OR go build -ldflags "-s -w" main.go && ./main 39 | ``` 40 | 41 | ### Must Changeable Variables in `constant.go`: 42 | 43 | ``` 44 | Production = 2 // Please set to 1 if in production. 45 | Domain = "https://lin.ks/" 46 | CookieName = "lin.ks" 47 | NodeID = "N1|" // Increase per node by value as "N2|", "N3|"... for multiple node 48 | DBFolder = "/home/ubuntu/go/src/shortlink/db/" 49 | AddFromToken = 3 // firt N character to get from token and use it in ShortID 50 | ShortIDToken = 7 // Further added from 1st N char of AddFromToken+NodeID: total=12 51 | APITokenLength = 32 52 | ``` 53 | 54 |
55 | Click here to see Rest API Example: 56 | 57 | 1. Short URL redirector: `/:short_code_here` 58 | 2. API Routes: 59 | > - /api/create [Post] 60 | >> Takes `{"url": "https://github.com"}` with `Authorization: Bearer {token}` from Header 61 | > - /api/update [Post] 62 | >> Takes `{"old": "https://github.com", "new": "https://bitbucket.com", "short": "shortcode"}` with `Authorization: Bearer {token}` from Header 63 | > - /api/delete [Post] 64 | >> Takes `{ "long": "https://bitbucket.com", "short": "shortcode"}` with `Authorization: Bearer {token}` from Header 65 | > - /api/fetch [GET] 66 | >> Takes `Authorization: Bearer {token}` from Header 67 | > - /api/fetch/:short_code_here [GET] 68 | >> {short_code_here} in the URL and Takes `Authorization: Bearer {token}` from Header 69 | 70 | **Note:** Remember to implement `Auth` system of your own and Replace `APITokenLength` check with your own function. 71 |
72 | 73 | Please see the [`rest.http`](https://github.com/go-awesome/shortlink/blob/main/rest.http) file to understand the request type in live details. 74 | 75 | ### Feature request? 76 | 77 | Share your feature request via `issue` tracker. 78 | 79 | ### Feel like helping out: 80 | 81 | - Via Code Contribution (if any / new feature) 82 | - BTC: `1Hp24RtL3o86boapSAD3DtyqF5jdq1rfpM` 83 | - Star the repository and watch out for new updates and features. 84 | 85 | ### Do not Forget [ Shortlink App Plan ] 86 | 87 | - Checkout the [Shortlink App plan PDF file](https://github.com/go-awesome/shortlink/blob/main/ShortLink%20App%20Plan.pdf) for more understanding about the Repo: 88 | 89 | ### Following Use cases: 90 | 91 | - Self-Hosted URL tracking. 92 | - Your URL tracking insights is in-house and not hosted or shared with third party. 93 | 94 | 95 | ## License 96 | 97 | Distributed under the Apache License 2.0. See `LICENSE` for more information. -------------------------------------------------------------------------------- /rest.http: -------------------------------------------------------------------------------- 1 | ### Index page 2 | 3 | GET http://127.0.0.1:8080 HTTP/1.1 4 | 5 | ### Create Short URL request 6 | 7 | POST http://127.0.0.1:8080/api/create HTTP/1.1 8 | content-type: application/json 9 | Authorization: Bearer 12345678123456781234567812345678 10 | 11 | { 12 | "url": "https://example.com" 13 | } 14 | 15 | ### Update Short URL request 16 | 17 | POST http://127.0.0.1:8080/api/update HTTP/1.1 18 | content-type: application/json 19 | Authorization: Bearer 12345678123456781234567812345678 20 | 21 | { 22 | "old": "https://example.com", 23 | "new": "https://google.com", 24 | "short": "N1|123ME1oJPK" 25 | } 26 | 27 | ### Fetch all Short URL request 28 | 29 | GET http://127.0.0.1:8080/api/fetch HTTP/1.1 30 | content-type: application/json 31 | Authorization: Bearer 12345678123456781234567812345678 32 | 33 | ### Fetch specific short URL traffic details 34 | 35 | GET http://127.0.0.1:8080/api/fetch/N1|123ME1oJPK HTTP/1.1 36 | content-type: application/json 37 | Authorization: Bearer 12345678123456781234567812345678 38 | 39 | ### Delete the Short URL 40 | 41 | POST http://127.0.0.1:8080/api/delete HTTP/1.1 42 | content-type: application/json 43 | Authorization: Bearer 12345678123456781234567812345678 44 | 45 | { 46 | "long": "https://google.com", 47 | "short": "N1|123ME1oJPK" 48 | } 49 | 50 | ### Redirector page 51 | 52 | GET http://127.0.0.1:8080/N1|123ME1oJPK HTTP/1.1 --------------------------------------------------------------------------------