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koa-image-placeholder

v0.0.7

Published

简单的koa模块, 生成占位图.

Downloads

15

Readme

koa-image-placeholder

一个简单的koa中间件, 用于生成占位图.

安装

npm install koa-image-placeholder --save

参数说明

  • rectColor: 图片背景色(默认: #EEEEEE)
  • fontSize: 字体大小(默认: 12)
  • fontColor: 字体颜色(默认: #AAAAAA)
  • io: 是否只展示占位图, 不展示任何其他的信息(默认: n)

URL配置

注册一个路由来响应中间件的占位图返回值(参照下方的示例代码).

urlquery接收四个参数

  • size(必须): 图片尺寸, 格式widthxheight(100x100).
  • text(可选): 图片上展示的文字
  • bg(可选): 图片背景色, aabbcc格式, 不带#
  • fc(可选): 图片上展示的文字颜色, aabbcc格式, 不带#
  • io(可选): image only, 若设置为y, 则文字以及尺寸信息将不再展示, fc设置也将无效, 只展示一个纯色的占位图(默认不包含该参数)

例: /placeholder?size=200x200&text=妈个蛋&bg=000&fc=FFF

示例代码

"use strict";

const url = require('url');
const koa = require('koa');
const router = require('koa-router');
const imagePlaceholder = require('../index');
const app = koa();

app.use(router(app));

app.get('/placeholder', imagePlaceholder({
    rectColor: '#333',
    fontSize: '10',
    fontColor: '#FFF'
}));

app.get('/home', function *() {
    this.body = '<h1>Home</h1><img src="/placeholder?size=300x300&text=妈个蛋&bg=000&fc=FFF" />'
});

app.listen(8080);

DEBUG

DEBUG=koa-image-placeholder