Apollo-server-env是Apollo server的一个NPM工具包,可以用于处理获取请求头、响应头、URL相关信息等操作。本教程将详细介绍如何使用该工具包,并提供示例代码,带您快速掌握。
安装
使用npm安装:
npm install apollo-server-env
使用
引入apollo-server-env工具包:
const { createFetch } = require('apollo-server-env');
创建fetch对象:
const myFetch = createFetch({ url: 'https://example.com/graphql', fetch, headers: { //设置请求头,若不需要则省略 authorization: 'Bearer my-auth-token', }, });
API
createFetch(options: object): FetchFunction
options (object)
: 选项对象url (string)
: graphql服务地址fetch (function)
: 需要使用的fetch包headers (object)
: 请求头信息
- 返回值:创建好的FetchFunction
const myFetch = createFetch({ url: 'https://example.com/graphql', fetch, headers: { authorization: 'Bearer my-auth-token', }, });
fetch(input?: Request | string, init?: RequestInit): Promise<Response>
input (Request | string)
: 请求信息init (RequestInit)
: 请求配置- 返回值:请求结果
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Headers
封装了请求头信息(Header)的类,可以处理和操作请求头相关的属性,例如:迭代器、赋值、序列化和判断是否存在等。
append(name: string, value: string): void
追加指定请求头
const headers = new Headers(); headers.append('Authorization', 'Bearer my-auth-token');
delete(name: string): void
移除指定请求头
const headers = new Headers({ Authorization: 'Bearer my-auth-token', }); headers.delete('Authorization');
entries(): IterableIterator<Array<string>>
返回所有请求头的entries
const headers = new Headers({ Authorization: 'Bearer my-auth-token', }); console.log([...headers.entries()]);
get(name: string): string | null
获取指定请求头
const headers = new Headers({ Authorization: 'Bearer my-auth-token', }); console.log(headers.get('Authorization'));
has(name: string): boolean
判断是否包含指定请求头
const headers = new Headers({ Authorization: 'Bearer my-auth-token', }); console.log(headers.has('Authorization'));
keys(): IterableIterator<string>
获取所有请求头的keys
const headers = new Headers({ Authorization: 'Bearer my-auth-token', }); console.log([...headers.keys()]);
set(name: string, value: string): void
设置指定请求头的值
const headers = new Headers(); headers.set('Authorization', 'Bearer my-auth-token'); headers.set('Authorization', 'Bearer new-auth-token'); console.log(headers.get('Authorization'));
values(): IterableIterator<string>
获取所有请求头的values
const headers = new Headers({ Authorization: 'Bearer my-auth-token', }); console.log([...headers.values()]);
示例代码
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指导意义
通过学习使用Apollo-server-env工具包,可以更方便地处理请求头相关的信息,使得我们可以更轻松地进行请求头的操作,提升代码的可读性和可维护性。此外,本教程还提供了许多API的示例代码,可以帮助读者更深入地理解和掌握这些函数。
来源:JavaScript中文网 ,转载请注明来源 https://www.javascriptcn.com/post/72737