【第一弹】用不完，根本用不完，部署cf worker无限免费绘画，可Api，支持多模型切换 - 常规话题 / 人工智能 - LINUX DO
支持/v1/chat/completions，/v1/models接口
前提得有一个cloudflare账号，申请账号token,这一步可以百度或者
复制以下代码，部署到cloudflare，记得把account_id，token改为你自己的
部署到CF的worker.js中
9月7日更新
1、更换新图床（需自行申请：https://sm.ms）有更好的图床可留言
2、增加提示词翻译、优化启用控制（—ntl关闭，—tl开启）
//本项目授权api_key，防止被恶意调用
const API_KEY = "sk-1234567890";
//https://sm.ms 图床key，可自行申请，为空则返回base64编码后的图片
const SMMS_API_KEY = '';
//cloudflare账号列表，每次请求都会随机从列表里取一个账号
const CF_ACCOUNT_LIST = [
{ account_id: "xxxx", token: "xxxx" }
];
//在你输入的prompt中添加 ---ntl可强制禁止提示词翻译、优化功能
//在你输入的prompt中添加 ---tl可强制开启提示词翻译、优化功能
//是否开启提示词翻译、优化功能
const CF_IS_TRANSLATE = true;
//示词翻译、优化模型
const CF_TRANSLATE_MODEL = "@cf/qwen/qwen1.5-14b-chat-awq";
//模型映射，设置客户端可用的模型。one-api，new-api在添加渠道时可使用“获取模型列表”功能，一键添加模型
const CUSTOMER_MODEL_MAP = {
"dreamshaper-8": "@cf/lykon/dreamshaper-8-lcm",
"stable-diffusion-xl-base-cf": "@cf/stabilityai/stable-diffusion-xl-base-1.0",
"stable-diffusion-xl-lightning-cf": "@cf/bytedance/stable-diffusion-xl-lightning"
};
async function handleRequest(request) {
try {
if (request.method === "OPTIONS") {
return new Response("", {
status: 204,
headers: {
'Access-Control-Allow-Origin': '*',
"Access-Control-Allow-Headers": '*'
}
});
}
const authHeader = request.headers.get("Authorization");
if (!authHeader || !authHeader.startsWith("Bearer ") || authHeader.split(" ")[1] !== API_KEY) {
return new Response("Unauthorized", { status: 401 });
}
if (request.url.endsWith("/v1/models")) {
const arrs = [];
Object.keys(CUSTOMER_MODEL_MAP).map(element => arrs.push({ id: element, object: "model" }))
const response = {
data: arrs,
success: true
};
return new Response(JSON.stringify(response), {
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Headers': '*'
}
});
}
if (request.method !== "POST") {
return new Response("Only POST requests are allowed", {
status: 405,
headers: {
'Access-Control-Allow-Origin': '*',
"Access-Control-Allow-Headers": '*'
}
});
}
if (!request.url.endsWith("/v1/chat/completions")) {
return new Response("Not Found", {
status: 404,
headers: {
'Access-Control-Allow-Origin': '*',
"Access-Control-Allow-Headers": '*'
}
});
}
const data = await request.json();
const messages = data.messages || [];
const model = CUSTOMER_MODEL_MAP[data.model] || CUSTOMER_MODEL_MAP["stable-diffusion-xl-lightning"];
const stream = data.stream || false;
const userMessage = messages.reverse().find((msg) => msg.role === "user")?.content;
if (!userMessage) {
return new Response(JSON.stringify({ error: "未找到用户消息" }), {
status: 400,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Headers': '*'
}
});
}
const is_translate = extractTranslate(userMessage);
const originalPrompt = cleanPromptString(userMessage);
const translatedPrompt = is_translate ? await getPrompt(originalPrompt) : originalPrompt;
const imageUrl = await generateImageByText(model, translatedPrompt);
if (stream) {
return handleStreamResponse(originalPrompt, translatedPrompt, "1024x1024", model, imageUrl);
} else {
return handleNonStreamResponse(originalPrompt, translatedPrompt, "1024x1024", model, imageUrl);
}
} catch (error) {
return new Response("Internal Server Error: " + error.message, {
status: 500,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Headers': '*'
}
});
}
}
async function getPrompt(prompt) {
const requestBodyJson = {
messages: [
{
role: "system",
content: `作为 Stable Diffusion Prompt 提示词专家，您将从关键词中创建提示，通常来自 Danbooru 等数据库。
提示通常描述图像，使用常见词汇，按重要性排列，并用逗号分隔。避免使用"-"或"."，但可以接受空格和自然语言。避免词汇重复。
为了强调关键词，请将其放在括号中以增加其权重。例如，"(flowers)"将'flowers'的权重增加1.1倍，而"(((flowers)))"将其增加1.331倍。使用"(flowers:1.5)"将'flowers'的权重增加1.5倍。只为重要的标签增加权重。
提示包括三个部分：**前缀**（质量标签+风格词+效果器）+ **主题**（图像的主要焦点）+ **场景**（背景、环境）。
* 前缀影响图像质量。像"masterpiece"、"best quality"、"4k"这样的标签可以提高图像的细节。像"illustration"、"lensflare"这样的风格词定义图像的风格。像"bestlighting"、"lensflare"、"depthoffield"这样的效果器会影响光照和深度。
* 主题是图像的主要焦点，如角色或场景。对主题进行详细描述可以确保图像丰富而详细。增加主题的权重以增强其清晰度。对于角色，描述面部、头发、身体、服装、姿势等特征。
* 场景描述环境。没有场景，图像的背景是平淡的，主题显得过大。某些主题本身包含场景（例如建筑物、风景）。像"花草草地"、"阳光"、"河流"这样的环境词可以丰富场景。你的任务是设计图像生成的提示。请按照以下步骤进行操作：
1. 我会发送给您一个图像场景。需要你生成详细的图像描述
2. 图像描述必须是英文，输出为Positive Prompt。
示例：
我发送：二战时期的护士。
您回复只回复：
A WWII-era nurse in a German uniform, holding a wine bottle and stethoscope, sitting at a table in white attire, with a table in the background, masterpiece, best quality, 4k, illustration style, best lighting, depth of field, detailed character, detailed environment.`
},
{
role: "user",
content: prompt
}
]
};
const response = await postRequest(CF_TRANSLATE_MODEL, requestBodyJson);
if (!response.ok) {
return prompt;
}
const jsonResponse = await response.json();
const res = jsonResponse.result.response;
return res;
}
async function generateImageByText(model, prompt) {
try {
const jsonBody = { prompt: prompt, num_steps: 20, guidance: 7.5, strength: 1, width: 1024, height: 1024 };
const response = await postRequest(model, jsonBody);
if (SMMS_API_KEY) {
const imageUrl = await uploadImage(response);
return imageUrl;
}
else {
const arrayBuffer = await response.arrayBuffer();
const base64Image = arrayBufferToBase64(arrayBuffer);
return `data:image/webp;base64,${base64Image}`;
}
}
catch (error) {
return "图像生成或转换失败，请检查！" + error.message;
}
}
function arrayBufferToBase64(buffer) {
let binary = '';
const bytes = new Uint8Array(buffer);
const len = bytes.byteLength;
for (let i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i]);
}
return btoa(binary);
}
async function uploadImage(response) {
const imageBlob = await response.blob();
const formData = new FormData();
formData.append("smfile", imageBlob, "image.jpg");
const uploadResponse = await fetch("https://sm.ms/api/v2/upload", {
method: 'POST',
headers: {
'Authorization': `${SMMS_API_KEY}`,
},
body: formData,
});
if (!uploadResponse.ok) {
throw new Error("Failed to upload image");
}
const uploadResult = await uploadResponse.json();
//const imageUrl = uploadResult[0].src;
const imageUrl = uploadResult.data.url;
return imageUrl;
}
function handleStreamResponse(originalPrompt, translatedPrompt, size, model, imageUrl) {
const uniqueId = `chatcmpl-${Date.now()}`;
const createdTimestamp = Math.floor(Date.now() / 1000);
const systemFingerprint = "fp_" + Math.random().toString(36).substr(2, 9);
const content = `🎨 原始提示词：${originalPrompt}\n` +
`🌐 翻译后的提示词：${translatedPrompt}\n` +
`📐 图像规格：${size}\n` +
`🌟 图像生成成功！\n` +
`以下是结果：\n\n` +
``;
const responsePayload = {
id: uniqueId,
object: "chat.completion.chunk",
created: createdTimestamp,
model: model,
system_fingerprint: systemFingerprint,
choices: [
{
index: 0,
delta: {
content: content,
},
finish_reason: "stop",
},
],
};
const dataString = JSON.stringify(responsePayload);
return new Response(`data: ${dataString}\n\n`, {
status: 200,
headers: {
"Content-Type": "text/event-stream",
'Access-Control-Allow-Origin': '*',
"Access-Control-Allow-Headers": '*',
},
});
}
function handleNonStreamResponse(originalPrompt, translatedPrompt, size, model, imageUrl) {
const uniqueId = `chatcmpl-${Date.now()}`;
const createdTimestamp = Math.floor(Date.now() / 1000);
const systemFingerprint = "fp_" + Math.random().toString(36).substr(2, 9);
const content = `🎨 原始提示词：${originalPrompt}\n` +
`🌐 翻译后的提示词：${translatedPrompt}\n` +
`📐 图像规格：${size}\n` +
`🌟 图像生成成功！\n` +
`以下是结果：\n\n` +
``;
const response = {
id: uniqueId,
object: "chat.completion",
created: createdTimestamp,
model: model,
system_fingerprint: systemFingerprint,
choices: [{
index: 0,
message: {
role: "assistant",
content: content
},
finish_reason: "stop"
}],
usage: {
prompt_tokens: translatedPrompt.length,
completion_tokens: content.length,
total_tokens: translatedPrompt.length + content.length
}
};
const dataString = JSON.stringify(response);
return new Response(dataString, {
status: 200,
headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Headers': '*'
}
});
}
async function postRequest(model, jsonBody) {
const cf_account = CF_ACCOUNT_LIST[Math.floor(Math.random() * CF_ACCOUNT_LIST.length)];
const apiUrl = `https://api.cloudflare.com/client/v4/accounts/${cf_account.account_id}/ai/run/${model}`;
const response = await fetch(apiUrl, {
method: 'POST',
headers: {
'Authorization': `Bearer ${cf_account.token}`,
'Content-Type': 'application/json'
},
body: JSON.stringify(jsonBody)
});
if (!response.ok) {
throw new Error('Unexpected response ' + response.status);
}
return response;
}
function extractTranslate(prompt) {
const match = prompt.match(/---n?tl/);
if (match && match[0]) {
if (match[0] == "---ntl") {
return false;
}
else if (match[0] == "---tl") {
return true;
}
}
return CF_IS_TRANSLATE;
}
function cleanPromptString(prompt) {
return prompt.replace(/---n?tl/, "").trim();
}
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request));
});
