Go 光纖 - 我嘗試從 Go 網絡/http 轉換為 Go 光纖，如何轉換它？

Question

我是 golang 的新手，然后我學習了，我喜歡 Go 光纖。 我從 Go 光纖中學習，我看到 net/http 示例非常酷。 然后我嘗試從 Go net/http 示例轉換為 Go 光纖。

下面是 go 網/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)
    }
}

我把它改成

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"))
}

但我得到如下錯誤：

# 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)

請幫助驗證，我怎樣才能成功獲得 pprof.Lookup("allocs") ？ 提前致謝

Answer 1

我認為你可以替換這個：

  app.Get("/api", func(c *fiber.Ctx) error {
    profile := pprof.Lookup("allocs")
    return c.Get(profile)
  })

有了這個：

  app.Get("/api", func(c *fiber.Ctx) error {
    profile := pprof.Lookup("allocs")
    return profile.WriteTo(c, 1)
  })

*fiber.Ctx實現io.Writer ，所以在這個例子中你應該可以像http.ResponseWriter一樣使用它。