我正在嘗試將文件從 url 下載到本地文件。我想測試請求的 url 是否只是文件，如果它不是文件，它應該返回錯誤的請求任何幫助都將不勝感激package main import ( "fmt" "io" "net/http" "os" ) func main() { fileUrl := "http://example.com/file.txt" err := DownloadFile("./example.txt", fileUrl) if err != nil { panic(err) } fmt.Println("Downloaded: " + fileUrl) } // DownloadFile will download a url to a local file. func DownloadFile(filepath string, url string) error { // Get the data resp, err := http.Get(url) if err != nil { return err } defer resp.Body.Close() // Create the file out, err := os.Create(filepath) if err != nil { return err } defer out.Close() // Write the body to file _, err = io.Copy(out, resp.Body) return err }
1 回答
米脂
TA貢獻1836條經(jīng)驗 獲得超3個贊
以下是檢查 URL 是否可下載的方法。希望這可以幫助某人:)
package main
import (
"fmt"
"io"
"net/http"
"os"
)
func main() {
fileUrl := "http://example.com/file.txt"
err := DownloadFile("./example.txt", fileUrl)
if err != nil {
panic(err)
}
fmt.Println("Downloaded: " + fileUrl)
}
// DownloadFile will download a url to a local file.
func DownloadFile(filepath string, url string) error {
// Get the data
resp, err := http.Get(url)
contentType = resp.Header.Get("Content-Type")
if err != nil {
return err
}
defer resp.Body.Close()
if contentType == "application/octet-stream" {
// Create the file
out, err := os.Create(filepath)
if err != nil {
return err
}
defer out.Close()
// Write the body to file
_, err = io.Copy(out, resp.Body)
return err
} else {
fmt.Println("Requested URL is not downloadable")
return nil
}
}
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