/
main.go
194 lines (160 loc) · 4.51 KB
/
main.go
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package main
import (
"bufio"
"encoding/json"
"github.com/gin-gonic/contrib/static"
"github.com/gin-gonic/gin"
"io/ioutil"
"math/rand"
"os"
"strconv"
"text/template"
"time"
)
// Set numWords constant
const numWords int = 5000
func check(e error) {
if e != nil {
panic(e)
}
}
func randChoice(arr [numWords]string) string {
idx := rand.Intn(len(arr))
return arr[idx]
}
func extendJSON(target map[string]interface{}, extension map[string]interface{}) map[string]interface{} {
var resultSlice map[string]interface{} = make(map[string]interface{}, len(target)+len(extension))
for k, v := range target {
resultSlice[k] = v
}
for k, v := range extension {
resultSlice[k] = v
}
return resultSlice
}
func main() {
// Seed random number generator
rand.Seed(time.Now().UnixNano())
// Create gin router
r := gin.Default()
// Setup router
r.Use(static.Serve("/", static.LocalFile("public", false)))
// Read data files
var e error
var data []byte
var delimiters, prefixes, suffixes map[string]interface{}
data, e = ioutil.ReadFile("public/data/delimiters.json")
check(e)
e = json.Unmarshal(data, &delimiters)
check(e)
data, e = ioutil.ReadFile("public/data/prefixes.json")
check(e)
e = json.Unmarshal(data, &prefixes)
check(e)
prefixes = extendJSON(prefixes, delimiters)
data, e = ioutil.ReadFile("public/data/suffixes.json")
check(e)
e = json.Unmarshal(data, &suffixes)
suffixes = extendJSON(suffixes, delimiters)
// Create word array
var words [numWords]string
// Read from 5000-common-words.txt
f, err := os.Open("5000-common-words.txt")
check(err)
scanner := bufio.NewScanner(f)
scanner.Split(bufio.ScanLines)
// Fetch words
for i := 0; i < numWords; i++ {
scanner.Scan()
words[i] = scanner.Text()
}
/* Begin routes */
// Index
r.GET("/", func(c *gin.Context) {
tmpl, err := template.ParseFiles("templates/layouts/index.html", "templates/partials/head.html",
"templates/partials/index.html", "templates/partials/footer.html", "templates/partials/adsense.html")
if err != nil {
c.String(500, "Internal Server Error: Error parsing templates")
return
}
contextObj := gin.H{"title": "EZ Password Generator"}
err = tmpl.Execute(c.Writer, contextObj)
if err != nil {
c.String(500, "Internal Server Error: Error executing compiled template")
return
}
})
// Random words
r.GET("/randwords", func(c *gin.Context) {
num, err := strconv.Atoi(c.DefaultQuery("num", "4"))
if err != nil {
c.String(400, "Bad Request: Num paramenter was not an integer.")
return
}
if num <= 0 {
c.String(400, "Bad Request: Num parameter must be positive.")
return
}
// Dynamic array allocation
var myWords []string
myWords = make([]string, num)
for i, _ := range myWords {
myWords[i] = randChoice(words)
}
c.JSON(200, gin.H{"words": myWords})
})
r.GET("/delimiters", func(c *gin.Context) {
c.JSON(200, gin.H(delimiters))
})
r.GET("/prefixes", func(c *gin.Context) {
c.JSON(200, gin.H(prefixes))
})
r.GET("/suffixes", func(c *gin.Context) {
c.JSON(200, gin.H(suffixes))
})
r.GET("/characters", func(c *gin.Context) {
c.JSON(200, gin.H{
"delimiters": delimiters,
"prefixes": prefixes,
"suffixes": suffixes,
})
})
r.GET("/about", func(c *gin.Context) {
tmpl, err := template.ParseFiles("templates/layouts/index.html", "templates/partials/head.html",
"templates/partials/about.html", "templates/partials/footer.html", "templates/partials/adsense.html")
if err != nil {
c.String(500, "Internal Server Error: Error parsing templates")
return
}
contextObj := gin.H{"title": "EZ Password Generator"}
err = tmpl.Execute(c.Writer, contextObj)
if err != nil {
c.String(500, "Internal Server Error: Error executing compiled template")
return
}
})
r.GET("/terms", func(c *gin.Context) {
tmpl, err := template.ParseFiles("templates/layouts/index.html", "templates/partials/head.html",
"templates/partials/terms.html", "templates/partials/footer.html", "templates/partials/adsense.html")
if err != nil {
c.String(500, "Internal Server Error: Error parsing templates")
return
}
contextObj := gin.H{"title": "EZ Password Generator"}
err = tmpl.Execute(c.Writer, contextObj)
if err != nil {
c.String(500, "Internal Server Error: Error executing compiled template")
return
}
})
r.GET("/github", func(c *gin.Context) {
c.Redirect(301, "https://github.com/andrewyang96/GoPasswordGenerator")
})
/* End routes */
// Run server
port := os.Getenv("PORT")
if port == "" {
port = "8000"
}
r.Run(":" + port)
}