HTTP

源代码: lib/http.js

此模块包含客户端和服务器，可以通过 require('node:http')（CommonJS）或 import * as http from 'node:http'（ES 模块）导入。

¥This module, containing both a client and server, can be imported via require('node:http') (CommonJS) or import * as http from 'node:http' (ES module).

Node.js 中的 HTTP 接口旨在支持该协议的许多传统上难以使用的功能。特别是大的，可能是块编码的消息。接口从不缓冲整个请求或响应，因此用户能够流式传输数据。

¥The HTTP interfaces in Node.js are designed to support many features of the protocol which have been traditionally difficult to use. In particular, large, possibly chunk-encoded, messages. The interface is careful to never buffer entire requests or responses, so the user is able to stream data.

HTTP 消息头由类似如下的对象表示：

¥HTTP message headers are represented by an object like this:

{ "content-length": "123",
  "content-type": "text/plain",
  "connection": "keep-alive",
  "host": "example.com",
  "accept": "*/*" } 拷贝

键是小写的。值不会被修改。

¥Keys are lowercased. Values are not modified.

为了支持所有可能的 HTTP 应用，Node.js HTTP API 是非常低层的。它只进行流处理和消息解析。它将消息解析为标头和正文，但不解析实际的标头或正文。

¥In order to support the full spectrum of possible HTTP applications, the Node.js HTTP API is very low-level. It deals with stream handling and message parsing only. It parses a message into headers and body but it does not parse the actual headers or the body.

有关如何处理重复标头的详细信息，请参阅 message.headers。

¥See message.headers for details on how duplicate headers are handled.

接收到的原始标头保留在 rawHeaders 属性中，其是 [key, value, key2, value2, ...] 数组。例如，上面的消息头对象有类似如下的 rawHeaders 列表：

¥The raw headers as they were received are retained in the rawHeaders property, which is an array of [key, value, key2, value2, ...]. For example, the previous message header object might have a rawHeaders list like the following:

[ 'ConTent-Length', '123456',
  'content-LENGTH', '123',
  'content-type', 'text/plain',
  'CONNECTION', 'keep-alive',
  'Host', 'example.com',
  'accepT', '*/*' ] 拷贝