package main
import (
"bytes"
"io"
"io/ioutil"
"log"
"mime"
"net/http"
"net/url"
"path"
"strings"
"github.com/gin-gonic/gin"
)
var (
BaseURL = "/"
DevProxy string
indexTmpl []byte
)
func getIndexHtml(w io.Writer, file io.Reader) []byte {
if indexTmpl, err := ioutil.ReadAll(file); err != nil {
log.Println("Cannot read whole index.html: ", err)
return nil
} else {
good_base := []byte(path.Clean(path.Join(BaseURL+"/", "nuke"))[:len(path.Clean(path.Join(BaseURL+"/", "nuke")))-4])
indexTmpl = bytes.Replace(
bytes.Replace(
bytes.Replace(
indexTmpl,
[]byte(``),
[]byte(``),
-1,
),
[]byte("\"/_app/"),
append([]byte("\""), append(good_base, '_', 'a', 'p', 'p', '/')...),
-1,
),
[]byte("base: \""),
append([]byte("base: \""), good_base[:len(good_base)-1]...),
-1,
)
w.Write(indexTmpl)
return indexTmpl
}
}
func serveOrReverse(forced_url string, baseURL string) func(c *gin.Context) {
return func(c *gin.Context) {
if DevProxy != "" {
if u, err := url.Parse(DevProxy); err != nil {
http.Error(c.Writer, err.Error(), http.StatusInternalServerError)
} else {
if forced_url != "" {
u.Path = path.Join(u.Path, forced_url)
} else {
u.Path = path.Join(u.Path, strings.TrimPrefix(c.Request.URL.Path, baseURL))
}
if r, err := http.NewRequest(c.Request.Method, u.String(), c.Request.Body); err != nil {
http.Error(c.Writer, err.Error(), http.StatusInternalServerError)
} else if resp, err := http.DefaultClient.Do(r); err != nil {
http.Error(c.Writer, err.Error(), http.StatusBadGateway)
} else {
defer resp.Body.Close()
for key := range resp.Header {
c.Writer.Header().Add(key, resp.Header.Get(key))
}
c.Writer.WriteHeader(resp.StatusCode)
if r.URL.Path == path.Join(u.Path, "/") {
getIndexHtml(c.Writer, resp.Body)
} else {
io.Copy(c.Writer, resp.Body)
}
}
}
} else {
if forced_url != "" {
c.Request.URL.Path = forced_url
} else {
c.Request.URL.Path = strings.TrimPrefix(c.Request.URL.Path, baseURL)
}
if c.Request.URL.Path == "/" {
if len(indexTmpl) == 0 {
if file, err := Assets.Open("index.html"); err != nil {
log.Println("Unable to open index.html: ", err)
} else {
defer file.Close()
indexTmpl = getIndexHtml(c.Writer, file)
}
} else {
c.Writer.Write(indexTmpl)
}
} else if baseURL != "/" {
if file, err := Assets.Open(c.Request.URL.Path); err != nil {
http.FileServer(Assets).ServeHTTP(c.Writer, c.Request)
} else {
defer file.Close()
c.Writer.Header().Add("Content-Type", mime.TypeByExtension(path.Ext(c.Request.URL.Path)))
getIndexHtml(c.Writer, file)
}
} else {
http.FileServer(Assets).ServeHTTP(c.Writer, c.Request)
}
}
}
}
func declareStaticRoutes(router *gin.RouterGroup, baseURL string) {
router.GET("/", serveOrReverse("", baseURL))
router.GET("/exercices", serveOrReverse("/", baseURL))
router.GET("/exercices/*_", serveOrReverse("/", baseURL))
router.GET("/export", serveOrReverse("/", baseURL))
router.GET("/teams", serveOrReverse("/", baseURL))
router.GET("/teams/*_", serveOrReverse("/", baseURL))
router.GET("/themes", serveOrReverse("/", baseURL))
router.GET("/themes/*_", serveOrReverse("/", baseURL))
router.GET("/_app/*_", serveOrReverse("", baseURL))
router.GET("/.svelte-kit/*_", serveOrReverse("", baseURL))
router.GET("/node_modules/*_", serveOrReverse("", baseURL))
router.GET("/@vite/*_", serveOrReverse("", baseURL))
router.GET("/@fs/*_", serveOrReverse("", baseURL))
router.GET("/@id/*_", serveOrReverse("", baseURL))
router.GET("/src/*_", serveOrReverse("", baseURL))
}