I am new to golang then I learn and I love Go fiber. I learn from Go fiber and I see that net/http example is so cool. then I try to convert from Go net/http example to Go fiber.
The below is go net/http
package main
import (
"embed"
"io/fs"
"log"
"net/http"
"runtime/pprof"
)
//go:embed nextjs/dist
//go:embed nextjs/dist/_next
//go:embed nextjs/dist/_next/static/chunks/pages/*.js
//go:embed nextjs/dist/_next/static/*/*.js
var nextFS embed.FS
func main() {
// Root at the `dist` folder generated by the Next.js app.
distFS, err := fs.Sub(nextFS, "nextjs/dist")
if err != nil {
log.Fatal(err)
}
// The static Next.js app will be served under `/`.
http.Handle("/", http.FileServer(http.FS(distFS)))
// The API will be served under `/api`.
http.HandleFunc("/api", handleAPI)
// Start HTTP server at :8080.
log.Println("Starting HTTP server at http://localhost:8080 ...")
log.Fatal(http.ListenAndServe(":8080", nil))
}
func handleAPI(w http.ResponseWriter, _ *http.Request) {
// Gather memory allocations profile.
profile := pprof.Lookup("allocs")
// Write profile (human readable, via debug: 1) to HTTP response.
err := profile.WriteTo(w, 1)
if err != nil {
log.Printf("Error: Failed to write allocs profile: %v", err)
}
}
I change it to
package main
import (
"embed"
"log"
// "io/fs"
"runtime/pprof"
"github.com/gofiber/fiber/v2"
)
//go:embed nextjs/dist
//go:embed nextjs/dist/_next
//go:embed nextjs/dist/_next/static/chunks/pages/*.js
//go:embed nextjs/dist/_next/static/*/*.js
var nextFS embed.FS
func main() {
// Root at the `dist` folder generated by the Next.js app.
app := fiber.New()
// The static Next.js app will be served under `/`.
//http.Handle("/", http.FileServer(http.FS(distFS)))
app.Static("/","./nextjs/dist")
// The API will be served under `/api`.
app.Get("/api", func(c *fiber.Ctx) error {
profile := pprof.Lookup("allocs")
return c.Get(profile)
})
// Start HTTP server at :8080.
log.Println("Starting HTTP server at http://localhost:8080 ...")
log.Fatal(app.Listen(":8080"))
}
but I got error as follow:
# command-line-arguments
./main.go:29:17: cannot use profile (type *pprof.Profile) as type string in argument to c.Get
./main.go:29:17: cannot use c.Get(profile) (type string) as type error in return argument:
string does not implement error (missing Error method)
Please help to verify and how can I get the pprof.Lookup("allocs") successfully? Thanks in advance
CodePudding user response:
I think you can just replace this:
app.Get("/api", func(c *fiber.Ctx) error {
profile := pprof.Lookup("allocs")
return c.Get(profile)
})
With this:
app.Get("/api", func(c *fiber.Ctx) error {
profile := pprof.Lookup("allocs")
return profile.WriteTo(c, 1)
})
*fiber.Ctx
implements io.Writer
, so you should be able to use it like http.ResponseWriter
in this instance.