Таким образом вы можете использовать `user_agent`, как обычно, в коде Python, вместо того, чтобы вводить заглавные буквы как `User_Agent` или что-то подобное.

Если по какой-либо причине вам необходимо отключить автоматическое преобразование подчеркиваний в дефисы, установите для параметра `convert_underscores` в `Header` значение `False`:

=== "Python 3.10+"

          <offlineLinks>
            <!-- We need local copies of some of these for 2 reasons: a User-Agent problem (https://stackoverflow.com/a/47891403/28465) and an SSL problem (https://issues.apache.org/jira/browse/MJAVADOC-507). If we choose to work around the User-Agent problem, we can go back to <links>, sidestepping the SSL problem. -->

        final SetOnce<Map<String, Object>> initParamMapSet = new SetOnce<>();
        WebConfig webConfig = new WebConfig();
        webConfig.setUserAgent(Constants.CRAWLING_USER_AGENT_PREFIX + "1.0" + Constants.CRAWLING_USER_AGENT_SUFFIX);
        CrawlerClientFactory crawlerClientFactory = webConfig.initializeClientFactory(() -> new CrawlerClientFactory() {
            public void setInitParameterMap(final Map<String, Object> params) {

			expected:   []string{},
			unexpected: secretDiffColumns,
		},
		{
			name:   "test tabular output with a single secret diff",
			format: TABULAR,
			diffs: []SecretItemDiff{
				{
					Agent: "alligator",
					Proxy: "proxy",
					SecretItem: SecretItem{
						Name:        "fields",
						Data:        "certdata",
						Source:      "should",
						Destination: "destination",

digraph { envoy -> sds [dir=both, label="SDS"] envoy -> xdsproxy [dir=both, label="ADS"] sds -> ca [label="CSR"] xdsproxy -> discovery [dir=both,label="ADS"] envoy [shape=hexagon, color=purple] subgraph cluster_istioagent { label = "Istio Agent" color="orange" sds xdsproxy } subgraph cluster_istiod { label = "Istiod" color="lightblue" ca discovery } }...

# This is intended to explore new features coming to Istio.
# Stability, security, and performance are not guaranteed - use at your own risk.
meshConfig:
  defaultConfig:
    proxyMetadata:
      # Enable Istio agent to handle DNS requests for known hosts
      # Unknown hosts will automatically be resolved using upstream dns servers in resolv.conf

	// MinioReleaseURL - release URL.
	MinioReleaseURL = MinioReleaseBaseURL + minioOSARCH + SlashSeparator

	// MinioStoreName - MinIO store name.
	MinioStoreName = "MinIO"

	// MinioUAName - MinIO user agent name.
	MinioUAName = "MinIO"

	// MinioBannerName - MinIO banner name for startup message.
	MinioBannerName = "MinIO Object Storage Server"

	// MinioLicense - MinIO server license.

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild

import com.gradle.develocity.agent.gradle.scan.BuildScanConfiguration
import org.gradle.api.Project
import org.gradle.api.Task
import org.gradle.api.provider.Provider
import org.gradle.build.event.BuildEventsListenerRegistry

digraph { grpc -> ca [label="Send CSR gRPC Request"] subgraph cluster_istioagent { label = "Istio Agent" color="orange" sds SecretManager -> caClient [label="Sign CSR"] caClient -> grpc grpc -> TokenProvider [dir=none,label="Fetch JWT",color=purple] grpc -> cfiles [dir=none,label="Fetch Cert",color=purple] sds -> SecretManager [label="Generate certificate"] SecretManager -> cfiles [label="Write certs to file"] cfiles [label="Certificate Files"] grpc [shape=diamond] } subgraph cluster_istiod {...

## 自动转换

`Header` 比 `Path`、`Query` 和 `Cookie` 提供了更多功能。

大部分标准请求头用**连字符**分隔，即**减号**（`-`）。

但是 `user-agent` 这样的变量在 Python 中是无效的。

因此，默认情况下，`Header` 把参数名中的字符由下划线（`_`）改为连字符（`-`）来提取并存档请求头 。

同时，HTTP 的请求头不区分大小写，可以使用 Python 标准样式（即 **snake_case**）进行声明。

因此，可以像在 Python 代码中一样使用 `user_agent` ，无需把首字母大写为 `User_Agent` 等形式。

如需禁用下划线自动转换为连字符，可以把 `Header` 的 `convert_underscores` 参数设置为 `False`：

=== "Python 3.10+"