[confighttp] add confighttp.NewDefaultServerConfig() (open-telemetry#…

…10275)

#### Description
add a new default method to instantiate the HTTP server config.

<!-- Issue number if applicable -->
#### Link to tracking issue
open-telemetry#9655

.chloggen/newdefaultserverconfig.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: confighttp
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add `confighttp.NewDefaultServerConfig()` to instantiate the default HTTP server configuration
+
+# One or more tracking issues or pull requests related to the change
+issues: [9655]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]

config/confighttp/confighttp.go

@@ -306,6 +306,51 @@ type ServerConfig struct {
 
 	// CompressionAlgorithms configures the list of compression algorithms the server can accept. Default: ["", "gzip", "zstd", "zlib", "snappy", "deflate"]
 	CompressionAlgorithms []string `mapstructure:"compression_algorithms"`
+
+	// ReadTimeout is the maximum duration for reading the entire
+	// request, including the body. A zero or negative value means
+	// there will be no timeout.
+	//
+	// Because ReadTimeout does not let Handlers make per-request
+	// decisions on each request body's acceptable deadline or
+	// upload rate, most users will prefer to use
+	// ReadHeaderTimeout. It is valid to use them both.
+	ReadTimeout time.Duration `mapstructure:"read_timeout"`
+
+	// ReadHeaderTimeout is the amount of time allowed to read
+	// request headers. The connection's read deadline is reset
+	// after reading the headers and the Handler can decide what
+	// is considered too slow for the body. If ReadHeaderTimeout
+	// is zero, the value of ReadTimeout is used. If both are
+	// zero, there is no timeout.
+	ReadHeaderTimeout time.Duration `mapstructure:"read_header_timeout"`
+
+	// WriteTimeout is the maximum duration before timing out
+	// writes of the response. It is reset whenever a new
+	// request's header is read. Like ReadTimeout, it does not
+	// let Handlers make decisions on a per-request basis.
+	// A zero or negative value means there will be no timeout.
+	WriteTimeout time.Duration `mapstructure:"write_timeout"`
+
+	// IdleTimeout is the maximum amount of time to wait for the
+	// next request when keep-alives are enabled. If IdleTimeout
+	// is zero, the value of ReadTimeout is used. If both are
+	// zero, there is no timeout.
+	IdleTimeout time.Duration `mapstructure:"idle_timeout"`
+}
+
+// NewDefaultServerConfig returns ServerConfig type object with default values.
+// We encourage to use this function to create an object of ServerConfig.
+func NewDefaultServerConfig() ServerConfig {
+	tlsDefaultServerConfig := configtls.NewDefaultServerConfig()
+	return ServerConfig{
+		ResponseHeaders:   map[string]configopaque.String{},
+		TLSSetting:        &tlsDefaultServerConfig,
+		CORS:              &CORSConfig{},
+		WriteTimeout:      30 * time.Second,
+		ReadHeaderTimeout: 1 * time.Minute,
+		IdleTimeout:       1 * time.Minute,
+	}
 }
 
 type AuthConfig struct {
@@ -437,9 +482,15 @@ func (hss *ServerConfig) ToServer(_ context.Context, host component.Host, settin
 		includeMetadata: hss.IncludeMetadata,
 	}
 
-	return &http.Server{
+	server := &http.Server{
 		Handler: handler,
-	}, nil
+	}
+	server.ReadTimeout = hss.ReadTimeout
+	server.ReadHeaderTimeout = hss.ReadHeaderTimeout
+	server.WriteTimeout = hss.WriteTimeout
+	server.IdleTimeout = hss.IdleTimeout
+
+	return server, nil
 }
 
 func responseHeadersHandler(handler http.Handler, headers map[string]configopaque.String) http.Handler {

config/confighttp/confighttp_test.go

@@ -1009,9 +1009,9 @@ func verifyHeadersResp(t *testing.T, url string, expected map[string]configopaqu
 }
 
 func ExampleServerConfig() {
-	settings := ServerConfig{
-		Endpoint: "localhost:443",
-	}
+	settings := NewDefaultServerConfig()
+	settings.Endpoint = "localhost:443"
+
 	s, err := settings.ToServer(
 		context.Background(),
 		componenttest.NewNopHost(),
@@ -1283,9 +1283,8 @@ func TestServerWithErrorHandler(t *testing.T) {
 
 func TestServerWithDecoder(t *testing.T) {
 	// prepare
-	hss := ServerConfig{
-		Endpoint: "localhost:0",
-	}
+	hss := NewDefaultServerConfig()
+	hss.Endpoint = "localhost:0"
 	decoder := func(body io.ReadCloser) (io.ReadCloser, error) {
 		return body, nil
 	}
@@ -1552,3 +1551,14 @@ func BenchmarkHttpRequest(b *testing.B) {
 		})
 	}
 }
+
+func TestDefaultHTTPServerSettings(t *testing.T) {
+	httpServerSettings := NewDefaultServerConfig()
+	assert.NotNil(t, httpServerSettings.ResponseHeaders)
+	assert.NotNil(t, httpServerSettings.CORS)
+	assert.NotNil(t, httpServerSettings.TLSSetting)
+	assert.Equal(t, 1*time.Minute, httpServerSettings.IdleTimeout)
+	assert.Equal(t, 30*time.Second, httpServerSettings.WriteTimeout)
+	assert.Equal(t, time.Duration(0), httpServerSettings.ReadTimeout)
+	assert.Equal(t, 1*time.Minute, httpServerSettings.ReadHeaderTimeout)
+}

receiver/otlpreceiver/factory_test.go

@@ -58,10 +58,10 @@ func TestCreateTracesReceiver(t *testing.T) {
 			Transport: confignet.TransportTypeTCP,
 		},
 	}
+	defaultServerConfig := confighttp.NewDefaultServerConfig()
+	defaultServerConfig.Endpoint = testutil.GetAvailableLocalAddress(t)
 	defaultHTTPSettings := &HTTPConfig{
-		ServerConfig: &confighttp.ServerConfig{
-			Endpoint: testutil.GetAvailableLocalAddress(t),
-		},
+		ServerConfig:   &defaultServerConfig,
 		TracesURLPath:  defaultTracesURLPath,
 		MetricsURLPath: defaultMetricsURLPath,
 		LogsURLPath:    defaultLogsURLPath,
@@ -152,10 +152,10 @@ func TestCreateMetricReceiver(t *testing.T) {
 			Transport: confignet.TransportTypeTCP,
 		},
 	}
+	defaultServerConfig := confighttp.NewDefaultServerConfig()
+	defaultServerConfig.Endpoint = testutil.GetAvailableLocalAddress(t)
 	defaultHTTPSettings := &HTTPConfig{
-		ServerConfig: &confighttp.ServerConfig{
-			Endpoint: testutil.GetAvailableLocalAddress(t),
-		},
+		ServerConfig:   &defaultServerConfig,
 		TracesURLPath:  defaultTracesURLPath,
 		MetricsURLPath: defaultMetricsURLPath,
 		LogsURLPath:    defaultLogsURLPath,
@@ -246,10 +246,10 @@ func TestCreateLogReceiver(t *testing.T) {
 			Transport: confignet.TransportTypeTCP,
 		},
 	}
+	defaultServerConfig := confighttp.NewDefaultServerConfig()
+	defaultServerConfig.Endpoint = testutil.GetAvailableLocalAddress(t)
 	defaultHTTPSettings := &HTTPConfig{
-		ServerConfig: &confighttp.ServerConfig{
-			Endpoint: testutil.GetAvailableLocalAddress(t),
-		},
+		ServerConfig:   &defaultServerConfig,
 		TracesURLPath:  defaultTracesURLPath,
 		MetricsURLPath: defaultMetricsURLPath,
 		LogsURLPath:    defaultLogsURLPath,