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| package main
import ( "bytes" "fmt" "io" "io/ioutil" "net/http" "os" "regexp" "strings"
"github.com/tidwall/gjson"
"bufio" "strconv" "time" )
var quit = make(chan int)
func main() {
url := urlExists()
dirName := strconv.FormatInt(time.Now().Unix(), 10) imgDir := "./" + dirName + "/"
_, errs := pathExists(imgDir) if errs != nil { fmt.Printf("创建文件失败") return }
getImgURL(url, imgDir) }
func getImgURL(url, imgDir string) { reqest, err := http.NewRequest("GET", url, nil)
reqest.Header.Add("Content-Type", "application/json; charset=utf-8") reqest.Header.Add("Host", "www.zhihu.com") reqest.Header.Add("Referer", "www.zhihu.com") reqest.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36")
if err != nil { panic(err) }
client := &http.Client{}
response, err := client.Do(reqest)
if err != nil { fmt.Println("图片地址不正确,请重试") return }
defer response.Body.Close()
if response.StatusCode == 200 { body, _ := ioutil.ReadAll(response.Body) bodystr := string(body)
next := gjson.Get(bodystr, "paging.next")
fmt.Println(next.String() + "------------------------------------------------------")
for i := 0; i < 5; i++ { value := gjson.Get(bodystr, "data."+strconv.Itoa(i)+".content")
if len(value.String()) > 0 { var re = regexp.MustCompile(`(?m)<noscript><img src="(.\S*)"`)
for _, match := range re.FindAllStringSubmatch(value.String(), -1) { go downloadImg(match[1], imgDir) <-quit }
} else { fmt.Println("抓取结束") return } }
if len(next.String()) > 0 { getImgURL(next.String(), imgDir) } else { fmt.Println("抓取结束,已到最后一页") return }
} else { fmt.Println("获取数据错误,请重试") return } }
func downloadImg(url, imgDir string) (n int64, err error) { path := strings.Split(url, "/") var name string if len(path) > 1 { name = path[len(path)-1] }
fmt.Println(name) out, err := os.Create(imgDir + name) defer out.Close() resp, err := http.Get(url)
if err != nil { fmt.Println("图片下载失败") quit <- 0 return }
quit <- 0
defer resp.Body.Close() pix, err := ioutil.ReadAll(resp.Body) n, err = io.Copy(out, bytes.NewReader(pix))
return }
func pathExists(path string) (bool, error) { _, err := os.Stat(path) if err != nil { err := os.Mkdir(path, os.ModePerm)
if err != nil { return false, nil } }
return true, nil }
func urlExists() string { urls := bufio.NewReader(os.Stdin) fmt.Print("输入Url:") url, _, _ := urls.ReadLine() urlStr := string(url[:])
if len(url) == 0 { urlStr = urlExists() }
return urlStr
}
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