| 1 | import type { AssetsConfig } from '@yikart/assets' |
| 2 | import { basename } from 'node:path' |
| 3 | import { Inject, Injectable, Logger, Optional } from '@nestjs/common' |
| 4 | import { ASSETS_CONFIG } from '@yikart/assets' |
| 5 | import { AssetType } from '@yikart/mongodb' |
| 6 | import axios, { AxiosInstance } from 'axios' |
| 7 | import { RelayConfig } from '../libs/relay/relay.config' |
| 8 | |
| 9 | interface UploadSignResult { |
| 10 | id: string |
| 11 | url: string |
| 12 | uploadUrl: string |
| 13 | } |
| 14 | |
| 15 | interface RelayCommonResponse<T> { |
| 16 | code?: number |
| 17 | message?: string |
| 18 | data: T |
| 19 | } |
| 20 | |
| 21 | @Injectable() |
| 22 | export class RelayMediaResolverService { |
| 23 | private readonly logger = new Logger(RelayMediaResolverService.name) |
| 24 | private readonly httpClient: AxiosInstance | undefined |
| 25 | private readonly localUrlPrefixes: string[] |
| 26 | |
| 27 | constructor( |
| 28 | @Optional() private readonly config?: RelayConfig, |
| 29 | @Optional() @Inject(ASSETS_CONFIG) private readonly assetsConfig?: AssetsConfig, |
| 30 | ) { |
| 31 | this.localUrlPrefixes = [] |
| 32 | if (assetsConfig?.endpoint) { |
| 33 | this.localUrlPrefixes.push(assetsConfig.endpoint.replace(/\/+$/, '')) |
| 34 | } |
| 35 | if (assetsConfig?.cdnEndpoint) { |
| 36 | this.localUrlPrefixes.push(assetsConfig.cdnEndpoint.replace(/\/+$/, '')) |
| 37 | } |
| 38 | |
| 39 | if (!config) { |
| 40 | return |
| 41 | } |
| 42 | |
| 43 | this.httpClient = axios.create({ |
| 44 | baseURL: config.url, |
| 45 | timeout: config.timeout, |
| 46 | headers: { |
| 47 | 'x-api-key': config.apiKey, |
| 48 | }, |
| 49 | }) |
| 50 | } |
| 51 | |
| 52 | async resolveText(text: string): Promise<string> { |
| 53 | if (!this.httpClient || !text || this.localUrlPrefixes.length === 0) { |
| 54 | return text |
| 55 | } |
| 56 | |
| 57 | const localUrls = this.extractLocalUrls(text) |
| 58 | if (localUrls.length === 0) { |
| 59 | return text |
| 60 | } |
| 61 | |
| 62 | const uploadedByDownloadUrl = new Map<string, string>() |
| 63 | let resolved = text |
| 64 | for (const localUrl of localUrls) { |
| 65 | const downloadUrl = this.toDownloadUrl(localUrl) |
| 66 | if (!uploadedByDownloadUrl.has(downloadUrl)) { |
| 67 | uploadedByDownloadUrl.set(downloadUrl, await this.uploadFileFromLocalUrl(downloadUrl)) |
| 68 | } |
| 69 | const uploadedUrl = uploadedByDownloadUrl.get(downloadUrl) |
| 70 | if (uploadedUrl) { |
| 71 | resolved = resolved.split(localUrl).join(uploadedUrl) |
| 72 | } |
| 73 | } |
| 74 | return resolved |
| 75 | } |
| 76 | |
| 77 | async resolveJson<T>(value: T): Promise<T> { |
| 78 | if (!this.httpClient || value == null) { |
| 79 | return value |
| 80 | } |
| 81 | |
| 82 | if (typeof value === 'string') { |
| 83 | return await this.resolveText(value) as T |
| 84 | } |
| 85 | |
| 86 | const serialized = JSON.stringify(value) |
| 87 | if (!serialized) { |
| 88 | return value |
| 89 | } |
| 90 | |
| 91 | const resolved = await this.resolveText(serialized) |
| 92 | return resolved === serialized |
| 93 | ? value |
| 94 | : JSON.parse(resolved) as T |
| 95 | } |
| 96 | |
| 97 | private extractLocalUrls(text: string): string[] { |
| 98 | if (this.localUrlPrefixes.length === 0) { |
| 99 | return [] |
| 100 | } |
| 101 | |
| 102 | const urlPattern = new RegExp( |
| 103 | `(${this.localUrlPrefixes.map(prefix => this.escapeRegExp(prefix)).join('|')})/[^"\\s]+`, |
| 104 | 'g', |
| 105 | ) |
| 106 | return [...new Set(text.match(urlPattern) || [])] |
| 107 | } |
| 108 | |
| 109 | private toDownloadUrl(localUrl: string): string { |
| 110 | const cdnPrefix = this.assetsConfig?.cdnEndpoint?.replace(/\/+$/, '') |
| 111 | const endpointPrefix = this.assetsConfig?.endpoint?.replace(/\/+$/, '') |
| 112 | if (cdnPrefix && endpointPrefix && localUrl.startsWith(cdnPrefix)) { |
| 113 | const bucket = this.assetsConfig && 'bucketName' in this.assetsConfig |
| 114 | ? String(this.assetsConfig.bucketName || '') |
| 115 | : '' |
| 116 | const internalBase = `${endpointPrefix}${bucket ? `/${bucket}` : ''}` |
| 117 | return localUrl.replace(cdnPrefix, internalBase) |
| 118 | } |
| 119 | return localUrl |
| 120 | } |
| 121 | |
| 122 | private async post<T>(url: string, data: unknown): Promise<T> { |
| 123 | const response = await this.httpClient!.post<RelayCommonResponse<T> | T>(url, data) |
| 124 | const body = response.data |
| 125 | |
| 126 | if (this.isCommonResponse(body)) { |
| 127 | if (body.code != null && body.code !== 0) { |
| 128 | throw new Error(`Relay API error [${body.code}]: ${body.message}`) |
| 129 | } |
| 130 | return body.data |
| 131 | } |
| 132 | |
| 133 | return body |
| 134 | } |
| 135 | |
| 136 | private isCommonResponse<T>(body: RelayCommonResponse<T> | T): body is RelayCommonResponse<T> { |
| 137 | return typeof body === 'object' && body !== null && 'data' in body |
| 138 | } |
| 139 | |
| 140 | private async uploadFileFromLocalUrl(localUrl: string): Promise<string> { |
| 141 | const filename = basename(new URL(localUrl).pathname) |
| 142 | |
| 143 | const fileResponse = await axios.get(localUrl, { responseType: 'arraybuffer' }) |
| 144 | const contentType = fileResponse.headers['content-type'] || 'application/octet-stream' |
| 145 | const size = (fileResponse.data as ArrayBuffer).byteLength |
| 146 | |
| 147 | const signResult = await this.post<UploadSignResult>('/api/assets/uploadSign', { |
| 148 | filename, |
| 149 | type: AssetType.Temp, |
| 150 | size, |
| 151 | }) |
| 152 | |
| 153 | if (!signResult.uploadUrl) { |
| 154 | throw new Error(`Relay uploadSign returned no uploadUrl: ${JSON.stringify(signResult)}`) |
| 155 | } |
| 156 | |
| 157 | await axios.put(signResult.uploadUrl, fileResponse.data, { |
| 158 | headers: { 'Content-Type': contentType }, |
| 159 | timeout: this.config?.timeout, |
| 160 | }) |
| 161 | |
| 162 | await this.post(`/api/assets/${signResult.id}/confirm`, {}) |
| 163 | this.logger.debug({ localUrl, relayUrl: signResult.url }, 'Uploaded local media to relay') |
| 164 | return signResult.url |
| 165 | } |
| 166 | |
| 167 | private escapeRegExp(value: string): string { |
| 168 | return value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') |
| 169 | } |
| 170 | } |
| 171 |