使用phantom库将网页链接内容转PNG 、 JPEG 、 G

生成pdf文件存储

page.render() 能够把当前页面渲染成图片并输出到指定文件中。输出的文件格式由传入的文件扩展名决定，目前支持 PNG 、 JPEG 、 GIF 、 PDF 。

InternetHospitalRealModel.getPagePdf = async function(id, gsdm, cb){
    const phantom = require('phantom');
    const fs = require('fs');
    const path = require('path');
    let instance = await phantom.create();
    let page = await instance.createPage();
    let url = ''
    if(gsdm == 'SJMY' || gsdm == 'YKYD') {
       url =  `http://10.1.6.73/zhyw/tjbg/tjbgmx2.aspx?bh=${id}&gdm=${gsdm}&temp=${Math.random()}`
    }
    let status  = await page.open(url);
    if(status == 'success') {
        await page.property('viewportSize', {width: 1000, height: 600});
        let data = await page.render('a.pdf');
        await instance.exit();
    }else{
        cb(null)
    }
    await page.close();
}

生成图片base64

InternetHospitalRealModel.getPagePdf = async function(id, gsdm, cb){
    const phantom = require('phantom');
    const fs = require('fs');
    const path = require('path');
    let instance = await phantom.create();
    let page = await instance.createPage();
    let url = ''
    if(gsdm == 'SJMY' || gsdm == 'YKYD') {
       url =  `http://10.1.6.73/zhyw/tjbg/tjbgmx2.aspx?bh=${id}&gdm=${gsdm}&temp=${Math.random()}`
    }
    let status  = await page.open(url);
    if(status == 'success') {
        await page.property('viewportSize', {width: 1000, height: 600});
        let data = await page.renderBase64();
        data = 'data:image/png;base64,'+ data;
        cb(data);
    }else{
        cb(null);
    }
    await instance.exit();
    
}

学习参考文档：
https://segmentfault.com/q/1010000008331900
http://amirraminfar.com/phantomjs-node/#/install?id=node-v5x
https://www.npmjs.com/package/phantom
https://www.jianshu.com/p/15cba843bb55
https://javascript.ruanyifeng.com/tool/phantomjs.html#toc13