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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| import { CONFIG } from './config' | ||
| import { errorToString, genFail, genSuccess, sleep } from '../../utils' | ||
| import * as kv from './kv' | ||
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| import type openai from 'openai' | ||
| import type { Logger } from '../../utils' | ||
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| const MODULE = 'src/controller/openai/azureOpenAiClient.ts' | ||
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| export const finishReasonMap: { [key: string]: string } = { | ||
| length: '长度限制', | ||
| content_filter: '内容过滤', | ||
| } | ||
|
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| export const defaultCompletionConfig: Omit<openai.CreateCompletionRequest, 'model'> = { | ||
| max_tokens: CONFIG.MAX_CHAT_TOKEN_NUM, | ||
| } | ||
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| export const defaultChatCompletionConfig: Omit<openai.CreateChatCompletionRequest, 'messages' | 'model'> = { | ||
| max_tokens: CONFIG.MAX_CHAT_TOKEN_NUM, | ||
| ...CONFIG.OPEN_AI_API_CHAT_EXTRA_PARAMS, | ||
| } | ||
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| export class AzureOpenAiClient { | ||
| readonly basePath: string | ||
| readonly resourceName: string | ||
| readonly deployName: string | ||
| readonly apiKey: string | ||
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| constructor(readonly key: string, readonly logger: Logger) { | ||
| const [resourceName, deployName, apiKey] = key.split(':') | ||
| this.resourceName = resourceName | ||
| this.deployName = deployName | ||
| this.apiKey = apiKey | ||
| this.basePath = CONFIG.AZURE_API_PREFIX.replace('RESOURCENAME', resourceName) | ||
| } | ||
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| async base<T = any>(params: { | ||
| basePath?: string | ||
| extraPath?: string | ||
| init?: RequestInit<RequestInitCfProperties> & { timeout?: number } | ||
| }) { | ||
| const { extraPath = '', init = {} } = params | ||
|
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| if (CONFIG.OPEN_AI_API_KEY_OCCUPYING_DURATION > 0) { | ||
| await this.waitToHoldApiKey(this.apiKey) | ||
| } | ||
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| const controller = new AbortController() | ||
| const timer = setTimeout(() => controller.abort(), init.timeout || CONFIG.OPEN_AI_API_TIMEOUT_MS) | ||
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| const start = Date.now() | ||
| try { | ||
| const resp = await fetch(`${this.basePath}${extraPath}`, { | ||
| headers: { | ||
| 'Content-Type': 'application/json', | ||
| 'api-key': this.apiKey, | ||
| }, | ||
| ...init, | ||
| signal: controller.signal, | ||
| }) | ||
|
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| const json = await resp.json<Record<string, any>>() | ||
| this.logger.debug(`${MODULE} AzureOpenAI 回复 ${Date.now() - start} ${JSON.stringify(json)}`) | ||
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| if ('error' in json && json.error) { | ||
| this.logger.error(`${MODULE} AzureOpenAI 错误 ${JSON.stringify(json.error)}`) | ||
| return genFail(`AzureOpenAI 错误\n> ${(json.error as Error).message}`) | ||
| } | ||
|
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| return genSuccess(json as T) | ||
| } catch (e) { | ||
| const err = e as Error | ||
| this.logger.error(`${MODULE} 请求 AzureOpenAI 异常 ${Date.now() - start} ${errorToString(err)}`) | ||
| return genFail(`请求 AzureOpenAI 异常\n> ${err.name === 'AbortError' ? '请求超时' : err.message}`) | ||
| } finally { | ||
| clearTimeout(timer) | ||
| } | ||
| } | ||
|
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| async listModels() { | ||
| const res = await this.base<openai.ListEnginesResponse>({ | ||
| extraPath: `/models?api-version=${CONFIG.AZURE_LIST_MODEL_API_VERSION}`, | ||
| init: { | ||
| method: 'GET', | ||
| timeout: 3000, | ||
| }, | ||
| }) | ||
| if (!res.success) return res | ||
|
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| const { data } = res.data | ||
| return genSuccess(data) | ||
| } | ||
|
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| async createCompletion(prompt: openai.CreateCompletionRequestPrompt, config = defaultCompletionConfig) { | ||
| const res = await this.base<openai.CreateCompletionResponse>({ | ||
| extraPath: `/deployments/${this.deployName}/completions?api-version=${CONFIG.AZURE_CHAT_API_VERSION}`, | ||
| init: { | ||
| method: 'POST', | ||
| body: JSON.stringify({ | ||
| prompt, | ||
| ...config, | ||
| }), | ||
| }, | ||
| }) | ||
| if (!res.success) return res | ||
|
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| const { id, usage, choices } = res.data | ||
| const first = choices[0] | ||
| if (first && first.text) { | ||
| return genSuccess({ | ||
| id, | ||
| usage, | ||
| msg: first.text, | ||
| finishReason: first.finish_reason ?? 'unknown', | ||
| finishReasonZh: finishReasonMap[first.finish_reason as string] ?? '未知', | ||
| }) | ||
| } | ||
|
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| return genFail(`AzureOpenAI 返回异常\n> 数据为空`) | ||
| } | ||
|
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| async createChatCompletion(messages: openai.ChatCompletionRequestMessage[], config = defaultChatCompletionConfig) { | ||
| const res = await this.base<openai.CreateChatCompletionResponse>({ | ||
| extraPath: `/deployments/${this.deployName}/chat/completions?api-version=${CONFIG.AZURE_CHAT_API_VERSION}`, | ||
| init: { | ||
| method: 'POST', | ||
| body: JSON.stringify({ | ||
| messages, | ||
| ...config, | ||
| }), | ||
| }, | ||
| }) | ||
| if (!res.success) return res | ||
|
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| const { id, usage, choices } = res.data | ||
| const first = choices[0] | ||
| if (first && first.message) { | ||
| return genSuccess({ | ||
| id, | ||
| usage: usage as openai.CreateCompletionResponseUsage, | ||
| msg: first.message, | ||
| finishReason: first.finish_reason || 'unknown', | ||
| finishReasonZh: finishReasonMap[first.finish_reason as string] ?? '未知', | ||
| }) | ||
| } | ||
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| return genFail(`AzureOpenAI 返回异常\n> 数据为空`) | ||
| } | ||
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| /** | ||
| * 用 kv 实现限流只能说勉强能用 | ||
| * TODO @see https://github.com/ilyydy/cf-openai/issues/14 | ||
| */ | ||
| async waitToHoldApiKey(apiKey: string) { | ||
| const waitDurationRes = await kv.getApiKeyWaitDuration(apiKey) | ||
| if (!waitDurationRes.success) { | ||
| this.logger.error(`${MODULE} 获取 apiKey '${apiKey}' 的过期时间失败`) | ||
| return '服务异常' | ||
| } | ||
|
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| const waitDuration = waitDurationRes.data | ||
| this.logger.debug(`${MODULE} apiKey '${apiKey}' waitDuration ${waitDuration}ms`) | ||
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| await kv.setApiKeyOccupied(apiKey, CONFIG.OPEN_AI_API_KEY_OCCUPYING_DURATION * 1000 + waitDuration + 1000) | ||
| if (waitDuration > 0) { | ||
| await sleep(waitDuration) | ||
| } | ||
| } | ||
| } |
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