Document extractor service (#15665)

* Document extractor service

* Fixing vendor modules

* Addressing PR Review comments

* Some small simplifications

* Fixing a linter complain

* simplifying a bit the code using package variables

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

vendor/github.com/advancedlogic/GoOse/html.go

@@ -0,0 +1,47 @@
+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"
+}