爬蟲自動轉碼，擷取城市列表：城市名稱+URL

//下載外掛程式工具
go get -v github.com/gpmgo/gopm

//自動匯入包外掛程式
gopm get -g -v golang.org/x/tools/cmd/goimports

//轉碼外掛程式
gopm get -g -v golang.org/x/text

//自動檢測網頁編碼
gopm get -g -v golang.org/x/net/html

package mainimport (    "net/http"    "io/ioutil"    "fmt"    "golang.org/x/text/transform"    "io"    "golang.org/x/text/encoding"    "golang.org/x/net/html/charset"    "bufio"    "regexp")func main() {    resp, err := http.Get("http://www.zhenai.com/zhenghun")    if err != nil {        panic(err)    }    defer resp.Body.Close()    if resp.StatusCode != http.StatusOK {        fmt.Println("Error:status code", resp.StatusCode)        return    }    e := determinEncoding(resp.Body)    utf8Reader := transform.NewReader(resp.Body, e.NewDecoder())    all, err := ioutil.ReadAll(utf8Reader)    if err != nil {        panic(err)    }    printCityList(all)}func printCityList(contents []byte) {    re := regexp.MustCompile(`<a href="(http://www.zhenai.com/zhenghun/[0-0a-z]+)"[^>]*>([^<]+)</a>`)    matches := re.FindAllSubmatch(contents, -1)    for _, m := range matches {        fmt.Printf("City: %s, URL: %s\n", m[2], m[1])    }    fmt.Printf("Matches found:%d\n", len(matches))}func determinEncoding(r io.Reader) encoding.Encoding {    bytes, err := bufio.NewReader(r).Peek(1024)    if err != nil {        panic(err)    }    e, _, _ := charset.DetermineEncoding(bytes, "")    return e}