serverhttp2session.origin(...origins)

• origins <string> | <URL> | <Object> 一个或多个 URL 字符串作为单独的参数传入。

向连接的客户端提交 ORIGIN 帧（由 RFC 8336 定义），以通告服务器能够为其提供权威响应的源集。

const http2 = require('http2');
const options = getSecureOptionsSomehow();
const server = http2.createSecureServer(options);
server.on('stream', (stream) => {
  stream.respond();
  stream.end('ok');
});
server.on('session', (session) => {
  session.origin('https://example.com', 'https://example.org');
});

当字符串作为 origin 传入时，则它会被解析为 URL 并导出来源。 例如，HTTP URL 'https://example.org/foo/bar' 的来源是 ASCII 字符串 'https://example.org'。 如果给定的字符串无法解析为 URL，或者无法导出有效的来源，则会抛出错误。

URL 对象，或任何具有 origin 属性的对象，都可以作为 origin 传入，在这种情况下，将使用 origin 属性的值。 origin 属性的值必须是正确序列化的 ASCII 源。

或者，在使用 http2.createSecureServer() 方法创建新的 HTTP/2 服务器时可以使用 origins 选项：

const http2 = require('http2');
const options = getSecureOptionsSomehow();
options.origins = ['https://example.com', 'https://example.org'];
const server = http2.createSecureServer(options);
server.on('stream', (stream) => {
  stream.respond();
  stream.end('ok');
});

• origins <string> | <URL> | <Object> One or more URL Strings passed as separate arguments.

Submits an ORIGIN frame (as defined by RFC 8336) to the connected client to advertise the set of origins for which the server is capable of providing authoritative responses.

const http2 = require('http2');
const options = getSecureOptionsSomehow();
const server = http2.createSecureServer(options);
server.on('stream', (stream) => {
  stream.respond();
  stream.end('ok');
});
server.on('session', (session) => {
  session.origin('https://example.com', 'https://example.org');
});

When a string is passed as an origin, it will be parsed as a URL and the origin will be derived. For instance, the origin for the HTTP URL 'https://example.org/foo/bar' is the ASCII string 'https://example.org'. An error will be thrown if either the given string cannot be parsed as a URL or if a valid origin cannot be derived.

A URL object, or any object with an origin property, may be passed as an origin, in which case the value of the origin property will be used. The value of the origin property must be a properly serialized ASCII origin.

Alternatively, the origins option may be used when creating a new HTTP/2 server using the http2.createSecureServer() method:

const http2 = require('http2');
const options = getSecureOptionsSomehow();
options.origins = ['https://example.com', 'https://example.org'];
const server = http2.createSecureServer(options);
server.on('stream', (stream) => {
  stream.respond();
  stream.end('ok');
});