67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
package application
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import (
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"context"
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"errors"
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"io/ioutil"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"time"
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)
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type Query struct {
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Width int
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Height int
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URL *url.URL
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}
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func buildQuery(u *url.URL) (q Query, err error) {
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t := strings.Split(u.Path, "/")
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if len(t) < 5 {
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return Query{}, errors.New("need more params")
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}
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q.Width, err = strconv.Atoi(t[2])
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if err != nil {
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return Query{}, errors.New("width must be an integer")
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}
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q.Height, err = strconv.Atoi(t[3])
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if err != nil {
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return Query{}, errors.New("height must be an integer")
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}
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tn := "http://" + strings.Join(t[4:], "/")
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q.URL, err = q.URL.Parse(tn)
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if err != nil {
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return Query{}, errors.New("not valid url")
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}
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return q, nil
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}
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func (q Query) id() string {
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return strconv.Itoa(q.Width) + "/" + strconv.Itoa(q.Height) + "/" + q.URL.Path
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}
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func (q Query) fromOrigin(timeout time.Duration) ([]byte, *http.Response, error) {
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client := &http.Client{}
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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req, err := http.NewRequestWithContext(ctx, "GET", "http://"+q.URL.Host+"/"+q.URL.Path, nil)
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if err != nil {
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return nil, nil, err
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}
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req.Close = true
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res, err := client.Do(req)
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if err != nil {
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return nil, nil, err
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}
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body, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return nil, nil, err
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}
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if err = res.Body.Close(); err != nil {
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return nil, nil, err
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}
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return body, res, nil
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}
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