| 1 | import { |
| 2 | CanActivate, |
| 3 | ExecutionContext, |
| 4 | Inject, |
| 5 | Injectable, |
| 6 | Logger, |
| 7 | UnauthorizedException, |
| 8 | } from '@nestjs/common' |
| 9 | import { Reflector } from '@nestjs/core' |
| 10 | import { JwtService } from '@nestjs/jwt' |
| 11 | import { AITOEARN_AUTH_OPTIONS, AitoearnAuthOptions, TokenPayload } from './aitoearn-auth.config' |
| 12 | import { API_KEY_HEADER_KEY, IS_INTERNAL_KEY, IS_PUBLIC_KEY } from './aitoearn-auth.constants' |
| 13 | |
| 14 | @Injectable() |
| 15 | export class AitoearnAuthGuard implements CanActivate { |
| 16 | private readonly logger = new Logger(AitoearnAuthGuard.name) |
| 17 | private readonly reflector = new Reflector() |
| 18 | constructor( |
| 19 | private readonly jwtService: JwtService, |
| 20 | @Inject(AITOEARN_AUTH_OPTIONS) |
| 21 | private readonly options: AitoearnAuthOptions, |
| 22 | ) {} |
| 23 | |
| 24 | async canActivate(context: ExecutionContext): Promise<boolean> { |
| 25 | const isPublic = this.reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [ |
| 26 | context.getHandler(), |
| 27 | context.getClass(), |
| 28 | ]) |
| 29 | const isInternal = this.reflector.getAllAndOverride<boolean>(IS_INTERNAL_KEY, [ |
| 30 | context.getHandler(), |
| 31 | context.getClass(), |
| 32 | ]) |
| 33 | |
| 34 | const request = context.switchToHttp().getRequest() |
| 35 | |
| 36 | if (isInternal) { |
| 37 | const token = this.extractTokenFromHeader(request) |
| 38 | if (token === this.options.internalToken) { |
| 39 | return true |
| 40 | } |
| 41 | throw new UnauthorizedException() |
| 42 | } |
| 43 | |
| 44 | // 1. API Key 认证（x-api-key，既有行为，对所有路由生效） |
| 45 | const apiKey = request.headers['x-api-key'] as string | undefined |
| 46 | if (apiKey) { |
| 47 | await this.resolveApiKey(request, apiKey) |
| 48 | return true |
| 49 | } |
| 50 | |
| 51 | // 2. 额外声明的 header（@ApiKeyHeader）按 API Key 解析 |
| 52 | const apiKeyHeader = this.reflector.getAllAndOverride<string>(API_KEY_HEADER_KEY, [ |
| 53 | context.getHandler(), |
| 54 | context.getClass(), |
| 55 | ]) |
| 56 | if (apiKeyHeader) { |
| 57 | // Authorization 特殊处理：优先按 JWT 校验，失败再兜底按 API Key 解析 |
| 58 | if (apiKeyHeader.toLowerCase() === 'authorization') { |
| 59 | const token = this.extractTokenFromHeader(request) |
| 60 | if (token && token !== this.options.internalToken) { |
| 61 | if (await this.tryJwt(request, token)) { |
| 62 | return true |
| 63 | } |
| 64 | await this.resolveApiKey(request, token) |
| 65 | return true |
| 66 | } |
| 67 | } |
| 68 | else { |
| 69 | const headerValue = request.headers[apiKeyHeader.toLowerCase()] as string | undefined |
| 70 | if (headerValue) { |
| 71 | await this.resolveApiKey(request, headerValue) |
| 72 | return true |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | // 3. Bearer Token 认证（默认 JWT 路径） |
| 78 | const token = this.extractTokenFromHeader(request) |
| 79 | if (!token) { |
| 80 | if (isPublic) { |
| 81 | return true |
| 82 | } |
| 83 | throw new UnauthorizedException() |
| 84 | } |
| 85 | |
| 86 | if (token === this.options.internalToken) { |
| 87 | return true |
| 88 | } |
| 89 | |
| 90 | if (await this.tryJwt(request, token)) { |
| 91 | return true |
| 92 | } |
| 93 | |
| 94 | if (isPublic) { |
| 95 | return true |
| 96 | } |
| 97 | throw new UnauthorizedException() |
| 98 | } |
| 99 | |
| 100 | private async resolveApiKey(request: any, apiKey: string): Promise<void> { |
| 101 | if (!this.options.getTokenInfoByApiKey) { |
| 102 | throw new UnauthorizedException() |
| 103 | } |
| 104 | request['user'] = await this.options.getTokenInfoByApiKey(apiKey) |
| 105 | } |
| 106 | |
| 107 | private async tryJwt(request: any, token: string): Promise<boolean> { |
| 108 | try { |
| 109 | const payload = await this.jwtService.verifyAsync<TokenPayload>(token, { |
| 110 | secret: this.options.secret, |
| 111 | }) |
| 112 | request['user'] = await this.options.getTokenInfo(payload) |
| 113 | return true |
| 114 | } |
| 115 | catch (error) { |
| 116 | this.logger.debug({ |
| 117 | message: 'token验证失败', |
| 118 | error, |
| 119 | }) |
| 120 | return false |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | private extractTokenFromHeader(request: any): string | undefined { |
| 125 | const [type, token] = request.headers.authorization?.split(' ') ?? [] |
| 126 | return type === 'Bearer' ? token : undefined |
| 127 | } |
| 128 | } |
| 129 |