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import { type ActionFunctionArgs } from '@remix-run/cloudflare';
import { streamText } from '~/lib/.server/llm/stream-text';
import type { IProviderSetting, ProviderInfo } from '~/types/model';
import { generateText } from 'ai';
import { PROVIDER_LIST } from '~/utils/constants';
import { MAX_TOKENS } from '~/lib/.server/llm/constants';
import { LLMManager } from '~/lib/modules/llm/manager';
import type { ModelInfo } from '~/lib/modules/llm/types';
import { getApiKeysFromCookie, getProviderSettingsFromCookie } from '~/lib/api/cookies';
export async function action(args: ActionFunctionArgs) {
return llmCallAction(args);
}
async function getModelList(options: {
apiKeys?: Record<string, string>;
providerSettings?: Record<string, IProviderSetting>;
serverEnv?: Record<string, string>;
}) {
const llmManager = LLMManager.getInstance(import.meta.env);
return llmManager.updateModelList(options);
}
async function llmCallAction({ context, request }: ActionFunctionArgs) {
const { system, message, model, provider, streamOutput } = await request.json<{
system: string;
message: string;
model: string;
provider: ProviderInfo;
streamOutput?: boolean;
}>();
const { name: providerName } = provider;
// validate 'model' and 'provider' fields
if (!model || typeof model !== 'string') {
throw new Response('Invalid or missing model', {
status: 400,
statusText: 'Bad Request',
});
}
if (!providerName || typeof providerName !== 'string') {
throw new Response('Invalid or missing provider', {
status: 400,
statusText: 'Bad Request',
});
}
const cookieHeader = request.headers.get('Cookie');
const apiKeys = getApiKeysFromCookie(cookieHeader);
const providerSettings = getProviderSettingsFromCookie(cookieHeader);
if (streamOutput) {
try {
const result = await streamText({
options: {
system,
},
messages: [
{
role: 'user',
content: `${message}`,
},
],
env: context.cloudflare.env,
apiKeys,
providerSettings,
});
return new Response(result.textStream, {
status: 200,
headers: {
'Content-Type': 'text/plain; charset=utf-8',
},
});
} catch (error: unknown) {
console.log(error);
if (error instanceof Error && error.message?.includes('API key')) {
throw new Response('Invalid or missing API key', {
status: 401,
statusText: 'Unauthorized',
});
}
throw new Response(null, {
status: 500,
statusText: 'Internal Server Error',
});
}
} else {
try {
const models = await getModelList({ apiKeys, providerSettings, serverEnv: context.cloudflare.env as any });
const modelDetails = models.find((m: ModelInfo) => m.name === model);
if (!modelDetails) {
throw new Error('Model not found');
}
const dynamicMaxTokens = modelDetails && modelDetails.maxTokenAllowed ? modelDetails.maxTokenAllowed : MAX_TOKENS;
const providerInfo = PROVIDER_LIST.find((p) => p.name === provider.name);
if (!providerInfo) {
throw new Error('Provider not found');
}
const result = await generateText({
system,
messages: [
{
role: 'user',
content: `${message}`,
},
],
model: providerInfo.getModelInstance({
model: modelDetails.name,
serverEnv: context.cloudflare.env as any,
apiKeys,
providerSettings,
}),
maxTokens: dynamicMaxTokens,
toolChoice: 'none',
});
return new Response(JSON.stringify(result), {
status: 200,
headers: {
'Content-Type': 'application/json',
},
});
} catch (error: unknown) {
console.log(error);
if (error instanceof Error && error.message?.includes('API key')) {
throw new Response('Invalid or missing API key', {
status: 401,
statusText: 'Unauthorized',
});
}
throw new Response(null, {
status: 500,
statusText: 'Internal Server Error',
});
}
}
}
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