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cii_http_client.go
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cii_http_client.go
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// Copyright 2021 OpenSSF Scorecard Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package clients
import (
"context"
"errors"
"fmt"
"io"
"math"
"net/http"
"time"
)
var errTooManyRequests = errors.New("failed after exponential backoff")
// httpClientCIIBestPractices implements the CIIBestPracticesClient interface.
// A HTTP client with exponential backoff is used to communicate with the CII Best Practices servers.
type httpClientCIIBestPractices struct{}
type expBackoffTransport struct {
numRetries uint8
}
func (transport *expBackoffTransport) RoundTrip(req *http.Request) (*http.Response, error) {
for i := 0; i < int(transport.numRetries); i++ {
resp, err := http.DefaultClient.Do(req)
if err != nil || resp.StatusCode != http.StatusTooManyRequests {
//nolint:wrapcheck
return resp, err
}
time.Sleep(time.Duration(math.Pow(2, float64(i))) * time.Second)
}
return nil, errTooManyRequests
}
// GetBadgeLevel implements CIIBestPracticesClient.GetBadgeLevel.
func (client *httpClientCIIBestPractices) GetBadgeLevel(ctx context.Context, uri string) (BadgeLevel, error) {
repoURI := fmt.Sprintf("https://%s", uri)
url := fmt.Sprintf("https://www.bestpractices.dev/projects.json?url=%s", repoURI)
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
return Unknown, fmt.Errorf("error during http.NewRequestWithContext: %w", err)
}
httpClient := http.Client{
Transport: &expBackoffTransport{
numRetries: 3,
},
}
resp, err := httpClient.Do(req)
if err != nil {
return Unknown, fmt.Errorf("error during http.Do: %w", err)
}
defer resp.Body.Close()
jsonData, err := io.ReadAll(resp.Body)
if err != nil {
return Unknown, fmt.Errorf("error during io.ReadAll: %w", err)
}
parsedResponse, err := ParseBadgeResponseFromJSON(jsonData)
if err != nil {
return Unknown, fmt.Errorf("error during json parsing: %w", err)
}
if len(parsedResponse) < 1 {
return NotFound, nil
}
return parsedResponse[0].getBadgeLevel()
}