forked from iotaledger/goshimmer
/
routes.go
191 lines (161 loc) · 4.66 KB
/
routes.go
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package dagsvisualizer
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"github.com/cockroachdb/errors"
"github.com/labstack/echo"
"github.com/markbates/pkger"
)
// ErrInvalidParameter defines the invalid parameter error.
var ErrInvalidParameter = errors.New("invalid parameter")
// ErrInternalError defines the internal error.
var ErrInternalError = errors.New("internal error")
// ErrNotFound defines the not found error.
var ErrNotFound = errors.New("not found")
// ErrForbidden defines the forbidden error.
var ErrForbidden = errors.New("forbidden")
const (
app = "/plugins/dagsvisualizer/frontend/build"
staticJS = "/plugins/dagsvisualizer/frontend/build/static/js"
staticCSS = "/plugins/dagsvisualizer/frontend/build/static/css"
staticMedia = "/plugins/dagsvisualizer/frontend/build/static/media"
)
func indexRoute(e echo.Context) error {
if Parameters.Dev {
req, err := http.NewRequestWithContext(e.Request().Context(), "GET", "http://"+Parameters.DevBindAddress, nil)
if err != nil {
return err
}
res, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
defer res.Body.Close()
devIndexHTML, err := io.ReadAll(res.Body)
if err != nil {
return err
}
return e.HTMLBlob(http.StatusOK, devIndexHTML)
}
index, err := pkger.Open(app + "/index.html")
if err != nil {
return err
}
defer index.Close()
indexHTML, err := io.ReadAll(index)
if err != nil {
return err
}
return e.HTMLBlob(http.StatusOK, indexHTML)
}
func setupRoutes(e *echo.Echo) {
if err := prepareSources(e); err != nil {
return
}
e.GET("/ws", websocketRoute)
e.GET("/", indexRoute)
// used to route into the dashboard index
e.GET("*", indexRoute)
apiRoutes := e.Group("/api")
setupDagsVisualizerRoutes(apiRoutes)
e.HTTPErrorHandler = func(err error, c echo.Context) {
log.Warnf("Request failed: %s", err)
var statusCode int
var block string
switch errors.Unwrap(err) {
case echo.ErrNotFound:
if e := c.Redirect(http.StatusSeeOther, "/"); e != nil {
log.Warn("failed to redirect request")
}
return
case echo.ErrUnauthorized:
statusCode = http.StatusUnauthorized
block = "unauthorized"
case ErrForbidden:
statusCode = http.StatusForbidden
block = "access forbidden"
case ErrInternalError:
statusCode = http.StatusInternalServerError
block = "internal server error"
case ErrNotFound:
statusCode = http.StatusNotFound
block = "not found"
case ErrInvalidParameter:
statusCode = http.StatusBadRequest
block = "bad request"
default:
statusCode = http.StatusInternalServerError
block = "internal server error"
}
block = fmt.Sprintf("%s, error: %+v", block, err)
if err := c.String(statusCode, block); err != nil {
log.Warn("failed to send error response")
}
}
}
func prepareSources(e *echo.Echo) error {
if Parameters.Dev {
e.GET("/static/*", func(e echo.Context) error {
res, err := http.Get("http://" + Parameters.DevBindAddress + e.Request().URL.Path)
if err != nil {
return err
}
defer res.Body.Close()
devIndexHTML, err := ioutil.ReadAll(res.Body)
if err != nil {
return err
}
return e.HTMLBlob(http.StatusOK, devIndexHTML)
})
} else {
// load assets from pkger: either from within the binary or actual disk
err := pkger.Walk(app, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
e.GET("/app/"+info.Name(), echo.WrapHandler(http.StripPrefix("/app", http.FileServer(pkger.Dir(app)))))
return nil
})
if err != nil {
log.Warnf("Failed to load files in pkger: %s", err)
return err
}
err = pkger.Walk(staticJS, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
e.GET("/static/js/"+info.Name(), echo.WrapHandler(http.StripPrefix("/static/js/", http.FileServer(pkger.Dir(staticJS)))))
return nil
})
if err != nil {
log.Warnf("Failed to load js files in pkger: %s", err)
return err
}
err = pkger.Walk(staticCSS, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
e.GET("/static/css/"+info.Name(), echo.WrapHandler(http.StripPrefix("/static/css/", http.FileServer(pkger.Dir(staticCSS)))))
return nil
})
if err != nil {
log.Warnf("Failed to load css files in pkger: %s", err)
return err
}
err = pkger.Walk(staticMedia, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
e.GET("/static/media/"+info.Name(), echo.WrapHandler(http.StripPrefix("/static/media/", http.FileServer(pkger.Dir(staticMedia)))))
return nil
})
if err != nil {
log.Warnf("Failed to load media files in pkger: %s", err)
return err
}
}
return nil
}