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/*
* This file is part of Go Responsiveness.
*
* Go Responsiveness is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software Foundation,
* either version 2 of the License, or (at your option) any later version.
* Go Responsiveness is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with Go Responsiveness. If not, see <https://www.gnu.org/licenses/>.
*/
package config
import (
"crypto/tls"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"github.com/network-quality/goresponsiveness/utilities"
)
type ConfigUrls struct {
SmallUrl string `json:"small_https_download_url"`
LargeUrl string `json:"large_https_download_url"`
UploadUrl string `json:"https_upload_url"`
}
type Config struct {
Version int
Urls ConfigUrls `json:"urls"`
Source string
ConnectToAddr string `json:"test_endpoint"`
}
func (c *Config) Get(configHost string, configPath string, insecureSkipVerify bool, keyLogger io.Writer) error {
configTransport := &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: insecureSkipVerify,
},
Proxy: http.ProxyFromEnvironment,
}
if !utilities.IsInterfaceNil(keyLogger) {
configTransport.TLSClientConfig.KeyLogWriter = keyLogger
}
utilities.OverrideHostTransport(configTransport, c.ConnectToAddr)
configClient := &http.Client{Transport: configTransport}
// Extraneous /s in URLs is normally okay, but the Apple CDN does not
// like them. Make sure that we put exactly one (1) / between the host
// and the path.
if !strings.HasPrefix(configPath, "/") {
configPath = "/" + configPath
}
c.Source = fmt.Sprintf("https://%s%s", configHost, configPath)
req, err := http.NewRequest("GET", c.Source, nil)
if err != nil {
return fmt.Errorf(
"Error: Could not create request for configuration host %s: %v",
configHost,
err,
)
}
req.Header.Set("User-Agent", utilities.UserAgent())
resp, err := configClient.Do(req)
if err != nil {
return fmt.Errorf(
"Error: could not connect to configuration host %s: %v",
configHost,
err,
)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return fmt.Errorf(
"Error: Configuration host %s returned %d for config request",
configHost,
resp.StatusCode,
)
}
jsonConfig, err := io.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf(
"Error: Could not read configuration content downloaded from %s: %v",
c.Source,
err,
)
}
err = json.Unmarshal(jsonConfig, c)
if err != nil {
return fmt.Errorf(
"could not parse configuration returned from %s: %v",
c.Source,
err,
)
}
return nil
}
func (c *Config) String() string {
return fmt.Sprintf(
"Version: %d\nSmall URL: %s\nLarge URL: %s\nUpload URL: %s\nEndpoint: %s\n",
c.Version,
c.Urls.SmallUrl,
c.Urls.LargeUrl,
c.Urls.UploadUrl,
c.ConnectToAddr,
)
}
func (c *Config) IsValid() error {
if parsedUrl, err := url.ParseRequestURI(c.Urls.LargeUrl); err != nil ||
parsedUrl.Scheme != "https" {
return fmt.Errorf(
"configuration url large_https_download_url is invalid: %s",
utilities.Conditional(
len(c.Urls.LargeUrl) != 0,
c.Urls.LargeUrl,
"Missing",
),
)
}
if parsedUrl, err := url.ParseRequestURI(c.Urls.SmallUrl); err != nil ||
parsedUrl.Scheme != "https" {
return fmt.Errorf(
"configuration url small_https_download_url is invalid: %s",
utilities.Conditional(
len(c.Urls.SmallUrl) != 0,
c.Urls.SmallUrl,
"Missing",
),
)
}
if parsedUrl, err := url.ParseRequestURI(c.Urls.UploadUrl); err != nil ||
parsedUrl.Scheme != "https" {
return fmt.Errorf(
"configuration url https_upload_url is invalid: %s",
utilities.Conditional(
len(c.Urls.UploadUrl) != 0,
c.Urls.UploadUrl,
"Missing",
),
)
}
return nil
}
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