Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/common/http/config.go

@@ -0,0 +1,78 @@
+package httpconfig
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/benbjohnson/clock"
+	"github.com/peterbourgon/unixtransport"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/config"
+	"github.com/influxdata/telegraf/plugins/common/cookie"
+	"github.com/influxdata/telegraf/plugins/common/oauth"
+	"github.com/influxdata/telegraf/plugins/common/proxy"
+	"github.com/influxdata/telegraf/plugins/common/tls"
+)
+
+// Common HTTP client struct.
+type HTTPClientConfig struct {
+	Timeout               config.Duration `toml:"timeout"`
+	IdleConnTimeout       config.Duration `toml:"idle_conn_timeout"`
+	MaxIdleConns          int             `toml:"max_idle_conn"`
+	MaxIdleConnsPerHost   int             `toml:"max_idle_conn_per_host"`
+	ResponseHeaderTimeout config.Duration `toml:"response_timeout"`
+
+	proxy.HTTPProxy
+	tls.ClientConfig
+	oauth.OAuth2Config
+	cookie.CookieAuthConfig
+}
+
+func (h *HTTPClientConfig) CreateClient(ctx context.Context, log telegraf.Logger) (*http.Client, error) {
+	tlsCfg, err := h.ClientConfig.TLSConfig()
+	if err != nil {
+		return nil, fmt.Errorf("failed to set TLS config: %w", err)
+	}
+
+	prox, err := h.HTTPProxy.Proxy()
+	if err != nil {
+		return nil, fmt.Errorf("failed to set proxy: %w", err)
+	}
+
+	transport := &http.Transport{
+		TLSClientConfig:       tlsCfg,
+		Proxy:                 prox,
+		IdleConnTimeout:       time.Duration(h.IdleConnTimeout),
+		MaxIdleConns:          h.MaxIdleConns,
+		MaxIdleConnsPerHost:   h.MaxIdleConnsPerHost,
+		ResponseHeaderTimeout: time.Duration(h.ResponseHeaderTimeout),
+	}
+
+	// Register "http+unix" and "https+unix" protocol handler.
+	unixtransport.Register(transport)
+
+	client := &http.Client{
+		Transport: transport,
+	}
+
+	// While CreateOauth2Client returns a http.Client keeping the Transport configuration,
+	// it does not keep other http.Client parameters (e.g. Timeout).
+	client = h.OAuth2Config.CreateOauth2Client(ctx, client)
+
+	if h.CookieAuthConfig.URL != "" {
+		if err := h.CookieAuthConfig.Start(client, log, clock.New()); err != nil {
+			return nil, err
+		}
+	}
+
+	timeout := h.Timeout
+	if timeout == 0 {
+		timeout = config.Duration(time.Second * 5)
+	}
+	client.Timeout = time.Duration(timeout)
+
+	return client, nil
+}