Question

最后，经过数周的自学后，我设法让PhantomJS（在NodeJS中运行）处理一个文件，其中包含属性，输出为PNG或PDF，这非常有效。

但是，过去几天我一直被困住，并希望有人能指点我。

当PhantomJS创建PDF并且我的子进程已完成时，如何显示一个对话框，询问用户是否要下载该文件？

我使用了以下代码：

childProcess.execFile(binPath, childArgs, 
function(err, stdout, stderr) {
     console.log('Child Processing complete!');
          download('myservername','test.png',function(){
               console.log('done')
          });
     }
);

使用＆＃34;下载＆＃34;功能如下：

var download = function(uri, filename, callback){
request.head(uri, function(err, res, body){
console.log('content-type:', res.headers['content-type']);
console.log('content-length:', res.headers['content-length']);
var r = request(uri).pipe(fs.createWriteStream(filename));
r.on('close', callback);
});
};

但我似乎无法在屏幕上看到提示我下载＆＃34; test.png＆＃34;

我有什么明显的遗失吗？

*编辑*

此处的实际代码：

这是调用的页面：

var util = require("util"),
path = require('path'),
fs = require('fs'),
request = require('request'),

url = require('url'),
http = require('http');


var phantomjs = require('phantomjs'),
path = require('path'),
childProcess = require('child_process');
childProcess2 = require('child_process');


var express = require('express');
var app = express();


var download = function(uri, filename, callback){
request.head(uri, function(err, res, body){
console.log('content-type:', res.headers['content-type']);
console.log('content-length:', res.headers['content-length']);
var r = request(uri).pipe(fs.createWriteStream(filename));
r.on('close', callback);
});
};

var binPath = phantomjs.path;

http.createServer(function(request,response){

console.log("Webpage was called");

var childArgs = [path.join(__dirname, 'tst2.js'),''];
childProcess.execFile(binPath, childArgs, 
function(err, stdout, stderr) {
console.log('Child Processing complete!');


download('[here is the url of my server with filename.png','test2.png',function(){
               console.log('done')
          });

 });
 response.writeHeader(200, {"Content-Type": "text/plain"});
 response.write("Processing Server");
 response.end();
 }).listen(8080);

和phantomJS页面在这里：

"use strict";
var page = require('webpage').create();
page.viewportSize = { width: 1663, height : 768};



page.paperSize = {
width: '11in',
height: '8.5in'
}

page.orientation='landscape'

page.onResourceRequested = function(requestData, request) {
console.log('::loading', requestData['url']); 
};

page.onLoadFinished = function() {
console.log('::rendering');
page.render('test.png');
phantom.exit();
};

var content='';
content += '<html><head>'
content +='</head><body>';
content+='<div class="col-md-12 col-lg-12 results">'

content+='<div class="col-md-8 detailsPanel">'
content+='</div>'

content +='</body></html>';
page.content=content;

就像我说的，它们都工作得很好，我调用的网页在端口8080上运行，我可以看到console.logs出现在Windows Server的命令框中，PNG文件完美呈现，但之后它只是挂在那里我没有下载提示。

打开＆＃34;下载＆＃34;在PhantomJS中处理PNG或PDF文件后提示

0 个答案: