1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
const express = require('express');
const cors = require('cors');
const axios = require('axios');
require('dotenv').config();
const app = express();
app.use(cors());
app.use(express.json());
const API_ENDPOINTS = {
chatgpt: 'https://api.openai.com/v1/chat/completions',
claude: 'https://api.anthropic.com/v1/messages',
gemini: 'https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent',
qianwen: 'https://dashscope.aliyuncs.com/api/v1/services/aigc/text-generation/generation'
};
const tokenManager = new TokenManager();
app.post('/api/:model/chat', async (req, res) => {
try {
const { model } = req.params;
const { message } = req.body;
if (!message) {
return res.status(400).json({ error: '消息内容不能为空' });
}
const apiKey = tokenManager.getAvailableAccount(model);
if (!apiKey) {
return res.status(503).json({ error: '当前模型暂时不可用' });
}
let response;
switch (model) {
case 'chatgpt':
response = await callChatGPT(apiKey, message);
break;
case 'claude':
response = await callClaude(apiKey, message);
break;
case 'gemini':
response = await callGemini(apiKey, message);
break;
case 'qianwen':
response = await callQianwen(apiKey, message);
break;
default:
return res.status(400).json({ error: '不支持的模型' });
}
tokenManager.updateUsage(apiKey, response.usage?.total_tokens || 100);
res.json({
response: response.content,
usage: response.usage,
model: model
});
} catch (error) {
console.error('聊天接口错误:', error);
res.status(500).json({
error: '请求失败',
details: error.message
});
}
});
async function callChatGPT(apiKey, message) {
const response = await axios.post(
API_ENDPOINTS.chatgpt,
{
model: 'gpt-3.5-turbo',
messages: [{ role: 'user', content: message }],
max_tokens: 1000,
temperature: 0.7
},
{
headers: {
'Authorization': `Bearer ${apiKey}`,
'Content-Type': 'application/json'
}
}
);
return {
content: response.data.choices[0].message.content,
usage: response.data.usage
};
}
async function callClaude(apiKey, message) {
const response = await axios.post(
API_ENDPOINTS.claude,
{
model: 'claude-3-haiku-20240307',
max_tokens: 1000,
messages: [{ role: 'user', content: message }]
},
{
headers: {
'x-api-key': apiKey,
'anthropic-version': '2023-06-01',
'content-type': 'application/json'
}
}
);
return {
content: response.data.content[0].text,
usage: { total_tokens: response.data.usage.input_tokens + response.data.usage.output_tokens }
};
}
async function callGemini(apiKey, message) {
const response = await axios.post(
`${API_ENDPOINTS.gemini}?key=${apiKey}`,
{
contents: [{
parts: [{ text: message }]
}]
}
);
return {
content: response.data.candidates[0].content.parts[0].text,
usage: { total_tokens: 100 }
};
}
async function callQianwen(apiKey, message) {
const response = await axios.post(
API_ENDPOINTS.qianwen,
{
model: 'qwen-max',
input: {
messages: [{ role: 'user', content: message }]
},
parameters: {
max_tokens: 1000,
temperature: 0.7
}
},
{
headers: {
'Authorization': `Bearer ${apiKey}`,
'Content-Type': 'application/json'
}
}
);
return {
content: response.data.output.text,
usage: response.data.usage
};
}
app.get('/health', (req, res) => {
res.json({
status: 'healthy',
timestamp: new Date().toISOString(),
models: Object.keys(API_ENDPOINTS)
});
});
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
console.log(`AI代理服务器运行在 http://localhost:${PORT}`);
console.log('可用模型:', Object.keys(API_ENDPOINTS).join(', '));
});
|
