`Header` ✔️ 🐥 ➕ 🛠️ 🔛 🔝 ⚫️❔ `Path`, `Query` & `Cookie` 🚚.

🌅 🐩 🎚 🎏 "🔠" 🦹, 💭 "➖ 🔣" (`-`).

✋️ 🔢 💖 `user-agent` ❌ 🐍.

, 🔢, `Header` 🔜 🗜 🔢 📛 🦹 ⚪️➡️ 🎦 (`_`) 🔠 (`-`) ⚗ & 📄 🎚.

, 🇺🇸🔍 🎚 💼-😛,, 👆 💪 📣 👫 ⏮️ 🐩 🐍 👗 (💭 "🔡").

, 👆 💪 ⚙️ `user_agent` 👆 🛎 🔜 🐍 📟, ↩️ 💆‍♂ 🎯 🥇 🔤 `User_Agent` ⚖️ 🕳 🎏.

🚥 🤔 👆 💪 ❎ 🏧 🛠️ 🎦 🔠, ⚒ 🔢 `convert_underscores` `Header` `False`:

=== "🐍 3️⃣.6️⃣ & 🔛"

      grpc-simple: |
{{ .Files.Get "files/grpc-simple.yaml" | trim | indent 8 }}
{{- end }}
{{- if not (hasKey .Values.sidecarInjectorWebhook.templates "grpc-agent") }}
      grpc-agent: |
{{ .Files.Get "files/grpc-agent.yaml" | trim | indent 8 }}
{{- end }}
{{- if not (hasKey .Values.sidecarInjectorWebhook.templates "waypoint") }}
      waypoint: |
{{ .Files.Get "files/waypoint.yaml" | trim | indent 8 }}

				if err != nil {
					fmt.Fprintf(os.Stderr, "Skip the agent in Pod %s due to the error: %s\n", namespacedName, err.Error())
					continue
				}
				responses = append(responses, resp)
			}
			token = list.ListMeta.GetContinue()
			if token == "" {
				break
			}
		}
	} else {
		// If there is a specific pod name in ResourceName, use the agent in the pod.
		if len(dr.ResourceNames) != 1 {

# 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

# 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

    assertThat(request.url.toString()).isEqualTo("http://example.com/")
    assertThat(request.header("User-Agent")).isEqualTo("foo")
    assertThat(request.body).isNull()
  }

  @Test
  fun defaultUserAgent() {
    val request = fromArgs("http://example.com").createRequest()
    assertThat(request.header("User-Agent")!!).startsWith("okcurl/")
  }

  @Test
  fun headerSplitWithDate() {
    val request =

But a variable like `user-agent` is invalid in Python.

So, by default, `Header` will convert the parameter names characters from underscore (`_`) to hyphen (`-`) to extract and document the headers.

Also, HTTP headers are case-insensitive, so, you can declare them with standard Python style (also known as "snake_case").

# 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

# 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

ほとんどの標準ヘッダーは、「マイナス記号」（`-`）としても知られる「ハイフン」で区切られています。

しかし、`user-agent`のような変数はPythonでは無効です。

そのため、デフォルトでは、`Header`はパラメータの文字をアンダースコア（`_`）からハイフン（`-`）に変換して、ヘッダーを抽出して文書化します。

また、HTTPヘッダは大文字小文字を区別しないので、Pythonの標準スタイル（別名「スネークケース」）で宣言することができます。

そのため、`User_Agent`などのように最初の文字を大文字にする必要はなく、通常のPythonコードと同じように`user_agent`を使用することができます。

もしなんらかの理由でアンダースコアからハイフンへの自動変換を無効にする必要がある場合は、`Header`の`convert_underscores`に`False`を設定してください: