// NewHTTPClient returns a new HTTP client configured for the given scrape configuration.
func NewHTTPClient(cfg *config.ScrapeConfig) (*http.Client, error) {
tlsOpts := httputil.TLSOptions{
InsecureSkipVerify: cfg.TLSConfig.InsecureSkipVerify,
CAFile: cfg.TLSConfig.CAFile,
}
if len(cfg.TLSConfig.CertFile) > 0 && len(cfg.TLSConfig.KeyFile) > 0 {
tlsOpts.CertFile = cfg.TLSConfig.CertFile
tlsOpts.KeyFile = cfg.TLSConfig.KeyFile
}
if len(cfg.TLSConfig.ServerName) > 0 {
tlsOpts.ServerName = cfg.TLSConfig.ServerName
}
tlsConfig, err := httputil.NewTLSConfig(tlsOpts)
if err != nil {
return nil, err
}
// The only timeout we care about is the configured scrape timeout.
// It is applied on request. So we leave out any timings here.
var rt http.RoundTripper = &http.Transport{
Proxy: http.ProxyURL(cfg.ProxyURL.URL),
DisableKeepAlives: true,
TLSClientConfig: tlsConfig,
}
// If a bearer token is provided, create a round tripper that will set the
// Authorization header correctly on each request.
bearerToken := cfg.BearerToken
if len(bearerToken) == 0 && len(cfg.BearerTokenFile) > 0 {
b, err := ioutil.ReadFile(cfg.BearerTokenFile)
if err != nil {
return nil, fmt.Errorf("unable to read bearer token file %s: %s", cfg.BearerTokenFile, err)
}
bearerToken = strings.TrimSpace(string(b))
}
if len(bearerToken) > 0 {
rt = httputil.NewBearerAuthRoundTripper(bearerToken, rt)
}
if cfg.BasicAuth != nil {
rt = httputil.NewBasicAuthRoundTripper(cfg.BasicAuth.Username, cfg.BasicAuth.Password, rt)
}
// Return a new client with the configured round tripper.
return httputil.NewClient(rt), nil
}
func newHTTPClient(cfg *config.ScrapeConfig) (*http.Client, error) {
rt := httputil.NewDeadlineRoundTripper(time.Duration(cfg.ScrapeTimeout), cfg.ProxyURL.URL)
tlsOpts := httputil.TLSOptions{
InsecureSkipVerify: cfg.TLSConfig.InsecureSkipVerify,
CAFile: cfg.TLSConfig.CAFile,
}
if len(cfg.TLSConfig.CertFile) > 0 && len(cfg.TLSConfig.KeyFile) > 0 {
tlsOpts.CertFile = cfg.TLSConfig.CertFile
tlsOpts.KeyFile = cfg.TLSConfig.KeyFile
}
tlsConfig, err := httputil.NewTLSConfig(tlsOpts)
if err != nil {
return nil, err
}
// Get a default roundtripper with the scrape timeout.
tr := rt.(*http.Transport)
// Set the TLS config from above
tr.TLSClientConfig = tlsConfig
rt = tr
// If a bearer token is provided, create a round tripper that will set the
// Authorization header correctly on each request.
bearerToken := cfg.BearerToken
if len(bearerToken) == 0 && len(cfg.BearerTokenFile) > 0 {
b, err := ioutil.ReadFile(cfg.BearerTokenFile)
if err != nil {
return nil, fmt.Errorf("unable to read bearer token file %s: %s", cfg.BearerTokenFile, err)
}
bearerToken = string(b)
}
if len(bearerToken) > 0 {
rt = httputil.NewBearerAuthRoundTripper(bearerToken, rt)
}
if cfg.BasicAuth != nil {
rt = httputil.NewBasicAuthRoundTripper(cfg.BasicAuth.Username, cfg.BasicAuth.Password, rt)
}
// Return a new client with the configured round tripper.
return httputil.NewClient(rt), nil
}