Javascript 处理https文件响应错误
如果服务器上不存在文件,或者无法与服务器连接以获取文件,我将如何处理这种情况 在下面的代码中,文件下载仍然发生,并且文件为空Javascript 处理https文件响应错误,javascript,node.js,http,stream,node-webkit,Javascript,Node.js,Http,Stream,Node Webkit,如果服务器上不存在文件,或者无法与服务器连接以获取文件,我将如何处理这种情况 在下面的代码中,文件下载仍然发生,并且文件为空 var https = require('https'); var fs = require('fs'); var exec = require('child_process').exec; var file = fs.createWriteStream('mediaserver_setup.exe'); var len = 0; var req = https.get(
var https = require('https');
var fs = require('fs');
var exec = require('child_process').exec;
var file = fs.createWriteStream('mediaserver_setup.exe');
var len = 0;
var req = https.get(url + 'appdata/update_setup.exe', function (res) {
if (res.statusCode === 404) {
alert('problem with request:');
}
res.on('data', function (chunk) {
file.write(chunk);
len += chunk.length;
var percent = (len / res.headers['content-length']) * 100;
progressLoading.val(percent);
});
res.on('end', function () {
setTimeout(function () {
file.close();
}, 500);
});
file.on('close', function () {
win.close();
exec('update_setup.exe');
});
});
req.on('error', function (err) {
alert('problem with request: ');
});
对请求使用
错误
事件,或检查响应的状态代码:
var https = require('https');
var req = https.get(options, function(res) {
// use res.statusCode
if (res.statusCode === 404) {
// example for checking 404 errors
}
});
req.on('error', function(err) {
// an error has occurred
});
在回调外部使用事件处理程序。