/
client.go
84 lines (69 loc) · 1.73 KB
/
client.go
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package utils
import (
"bytes"
"compress/gzip"
"context"
"fmt"
"io"
"net/http"
"github.com/DataDog/nikos/rpm/dnfv2/types"
)
type FetchedData struct {
data []byte
gzipped bool
}
func (d *FetchedData) Reader() (io.ReadCloser, error) {
r := bytes.NewReader(d.data)
if d.gzipped {
return gzip.NewReader(r)
}
return io.NopCloser(r), nil
}
func (d *FetchedData) Data() ([]byte, error) {
reader, err := d.Reader()
if err != nil {
return nil, err
}
defer reader.Close()
return io.ReadAll(reader)
}
type HttpClient struct {
inner *http.Client
}
func NewHttpClientFromInner(inner *http.Client) *HttpClient {
return &HttpClient{inner: inner}
}
func (hc *HttpClient) GetWithChecksum(ctx context.Context, url string, checksum *types.Checksum) (FetchedData, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
return FetchedData{}, err
}
resp, err := hc.inner.Do(req)
if err != nil {
return FetchedData{}, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return FetchedData{}, fmt.Errorf("bad status for `%s`: %s", url, resp.Status)
}
gzipped := UrlHasSuffix(url, ".gz") || resp.Header.Get("Content-Encoding") == "gzip"
readContent, err := io.ReadAll(resp.Body)
if err != nil {
return FetchedData{}, err
}
content := FetchedData{data: readContent, gzipped: gzipped}
if checksum != nil {
contentReader, err := content.Reader()
if err != nil {
return FetchedData{}, err
}
defer contentReader.Close()
if err := verifyChecksum(contentReader, checksum); err != nil {
return FetchedData{}, err
}
}
return content, nil
}
func (hc *HttpClient) Get(ctx context.Context, url string) (FetchedData, error) {
return hc.GetWithChecksum(ctx, url, nil)
}