node.js - nodejs大批量下载图片自动中断的问题如何解决
图片列表大概有1万个图片地址，
使用nodejs下载的时候，莫名其妙就会出现错误。
基本代码如下：
var downloadImage2 = function (src) {
var iArr = src.split("/");
var imageName = iArr[iArr.length - 1];
//console.log("Download begin: " + imageSrc);
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']);
if (uri) {request(uri).pipe(fs.createWriteStream(filename)).on('close', callback);}
});
};
download(src, "./images/" + imageName, function() {
console.log('done: ' + index++);
});
}出现的错误也有点莫名其妙，有时候是：
events.js:160
throw er; // Unhandled 'error' event
^
Error: Invalid URI "undefined"
at Request.init (/Users//dirread/node_modules/request/request.js:275:31)
at new Request (/Users/dirread/node_modules/request/request.js:129:8)
at request (/Users/dirread/node_modules/request/index.js:55:10)
at Request._callback (/Users//down.js:21:11)
at self.callback (/Users//dirread/node_modules/request/request.js:187:22)
at emitOne (events.js:96:13)
at Request.emit (events.js:188:7)
