80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
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package utils
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import (
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"errors"
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"fmt"
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"io"
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"net/url"
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"regexp"
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"strings"
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http "github.com/bogdanfinn/fhttp"
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tlsclient "github.com/bogdanfinn/tls-client"
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)
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func ReCaptcha(anchorUrl string) (string, error) {
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urlBase := "https://www.google.com/recaptcha/api2/"
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matches := regexp.MustCompile(`/anchor\?(.*)`).FindStringSubmatch(anchorUrl)
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if len(matches) < 2 {
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return "", fmt.Errorf("no matches found in ANCHOR_URL")
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}
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params := matches[1]
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client, err := tlsclient.NewHttpClient(tlsclient.NewNoopLogger())
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if err != nil {
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return "", err
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}
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req, err := http.NewRequest(http.MethodGet, anchorUrl, nil)
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if err != nil {
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return "", err
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}
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resp, err := client.Do(req)
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if err != nil {
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return "", err
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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return "", errors.New("recaptcha status code is not 200")
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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tokenMatches := regexp.MustCompile(`"recaptcha-token" value="(.*?)"`).FindStringSubmatch(string(body))
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if len(tokenMatches) < 2 {
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return "", errors.New("no token found in response")
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}
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token := tokenMatches[1]
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paramsMap, err := url.ParseQuery(params)
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if err != nil {
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return "", err
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}
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paramsMap.Set("c", token)
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paramsMap.Set("reason", "q")
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reloadUrl := urlBase + "reload?k=" + paramsMap.Get("k")
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postReq, err := http.NewRequest(http.MethodPost, reloadUrl, strings.NewReader(paramsMap.Encode()))
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if err != nil {
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return "", err
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}
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postReq.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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resp, err = client.Do(postReq)
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if err != nil {
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return "", err
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}
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defer resp.Body.Close()
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body, err = io.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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answerMatches := regexp.MustCompile(`"rresp","(.*?)"`).FindStringSubmatch(string(body))
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if len(answerMatches) < 2 {
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return "", fmt.Errorf("no answer found in reCaptcha response: %s", string(body))
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}
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return answerMatches[1], nil
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}
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//https://www.google.com/recaptcha/api2/anchor?ar=1&k=6Lf-ZrEUAAAAAEtmR70o2Rb9JM2QUBCH4j7EzIWX&co=aHR0cHM6Ly93d3cua2VlcGxpbmtzLm9yZzo0NDM.&hl=zh-CN&v=-80zvSY9h4i8O-ocN2P5qTJk&size=normal&cb=xm7hg2ftd5e2
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