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package goose
import (
resty "github.com/go-resty/resty/v2"
"github.com/pkg/errors"
)
type HtmlRequester interface {
fetchHTML(string) (string, error)
}
// Crawler can fetch the target HTML page
type htmlrequester struct {
config Configuration
}
// NewCrawler returns a crawler object initialised with the URL and the [optional] raw HTML body
func NewHtmlRequester(config Configuration) HtmlRequester {
return htmlrequester{
config: config,
}
}
func (hr htmlrequester) fetchHTML(url string) (string, error) {
client := resty.New()
client.SetTimeout(hr.config.timeout)
resp, err := client.R().
SetHeader("Content-Type", "text/html").
SetHeader("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30").
Get(url)
if err != nil {
return "", errors.Wrap(err, "could not perform request on "+url)
}
if resp.IsError() {
return "", &badRequest{Message: "could not perform request with " + url + " status code " + string(resp.StatusCode())}
}
return resp.String(), nil
}
type badRequest struct {
Message string `json:"message,omitempty"`
}
func (BadRequest *badRequest) Error() string {
return "Required request fields are not filled"
}
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