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package data
import (
"context"
"fmt"
"io"
"mime"
"net/http"
"net/url"
"time"
)
func buildURL(base *url.URL, args ...string) (*url.URL, error) {
if len(args) == 0 {
return base, nil
}
p, err := url.Parse(args[0])
if err != nil {
return nil, fmt.Errorf("bad sub-path %s: %w", args[0], err)
}
return base.ResolveReference(p), nil
}
func readHTTP(ctx context.Context, source *Source, args ...string) ([]byte, error) {
if source.hc == nil {
source.hc = &http.Client{Timeout: time.Second * 5}
}
u, err := buildURL(source.URL, args...)
if err != nil {
return nil, err
}
req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
if err != nil {
return nil, err
}
req.Header = source.Header
res, err := source.hc.Do(req)
if err != nil {
return nil, err
}
body, err := io.ReadAll(res.Body)
if err != nil {
return nil, err
}
err = res.Body.Close()
if err != nil {
return nil, err
}
if res.StatusCode != 200 {
err := fmt.Errorf("unexpected HTTP status %d on GET from %s: %s", res.StatusCode, source.URL, string(body))
return nil, err
}
ctypeHdr := res.Header.Get("Content-Type")
if ctypeHdr != "" {
mediatype, _, e := mime.ParseMediaType(ctypeHdr)
if e != nil {
return nil, e
}
source.mediaType = mediatype
}
return body, nil
}
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