63 lines
2.5 KiB
JavaScript
63 lines
2.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.createOllamaChatStream = exports.createOllamaGenerateStream = void 0;
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const stream_1 = require("@langchain/core/utils/stream");
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async function* createOllamaStream(url, params, options) {
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let formattedUrl = url;
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if (formattedUrl.startsWith("http://localhost:")) {
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// Node 18 has issues with resolving "localhost"
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// See https://github.com/node-fetch/node-fetch/issues/1624
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formattedUrl = formattedUrl.replace("http://localhost:", "http://127.0.0.1:");
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}
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const response = await fetch(formattedUrl, {
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method: "POST",
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body: JSON.stringify(params),
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headers: {
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"Content-Type": "application/json",
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...options.headers,
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},
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signal: options.signal,
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});
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if (!response.ok) {
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let error;
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const responseText = await response.text();
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try {
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const json = JSON.parse(responseText);
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error = new Error(`Ollama call failed with status code ${response.status}: ${json.error}`);
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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}
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catch (e) {
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error = new Error(`Ollama call failed with status code ${response.status}: ${responseText}`);
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}
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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error.response = response;
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throw error;
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}
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if (!response.body) {
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throw new Error("Could not begin Ollama stream. Please check the given URL and try again.");
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}
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const stream = stream_1.IterableReadableStream.fromReadableStream(response.body);
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const decoder = new TextDecoder();
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let extra = "";
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for await (const chunk of stream) {
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const decoded = extra + decoder.decode(chunk);
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const lines = decoded.split("\n");
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extra = lines.pop() || "";
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for (const line of lines) {
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try {
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yield JSON.parse(line);
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}
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catch (e) {
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console.warn(`Received a non-JSON parseable chunk: ${line}`);
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}
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}
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}
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}
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async function* createOllamaGenerateStream(baseUrl, params, options) {
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yield* createOllamaStream(`${baseUrl}/api/generate`, params, options);
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}
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exports.createOllamaGenerateStream = createOllamaGenerateStream;
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async function* createOllamaChatStream(baseUrl, params, options) {
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yield* createOllamaStream(`${baseUrl}/api/chat`, params, options);
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}
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exports.createOllamaChatStream = createOllamaChatStream;
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