Reading Chinese file encoding issues, sending emails and scheduled task examples in Nodejs_node.js

It took me a lot of time to read Chinese files with nodejs. There were various solutions on the Internet, but none of them worked for me. Fortunately, it was solved.

The following three knowledge points are extracted from the project. If you want to run the script separately, you need to use global mode to install the module, such as installing the Chinese conversion module (you will also need to do this for other things in the future):

Copy code The code is as follows:

npm install -g iconv-lite

npm install -g nodemailer

npm install -g node-schedule

1. Nodejs reading Chinese file encoding problem

Prepare a text file (of course it can also be a csv file, etc.) test.txt and text.csv, and the nodejs file test.js is as follows:

Copy code The code is as follows:

var iconv = require('iconv-lite');
var fs = require('fs');

var fileStr = fs.readFileSync('D:\test.csv', {encoding:'binary'});
var buf = new Buffer(fileStr, 'binary');
var str = iconv.decode(buf, 'GBK');

console.log(str);

If you read the file directly, it will be garbled. If you don’t believe it, you can try it. It is necessary to read uniformly using binary encoding first, and then use GBK to decode. The running results are as follows:

See more: iconv-lite

2. Send email with nodejs

Don’t say anything, just write the code directly, it’s simple and easy to understand:

Copy code The code is as follows:

var nodemailer = require('nodemailer');

//Configure email
var transporter = nodemailer.createTransport('SMTP',{
Service: '163qiye',
auth: {
         user: 'zhoujie0111@126.com',
Pass: '123456',
}
});

//Send email
var sendmail = function(html){
var option = {
                                                                                                                                                                                      From:"zhoujie0111@126.com",
                 to:"zhoujie0111@126.com,zhoujie0111@126.com",
              cc:'zhoujie0111@126.com'
}
​ option.subject = 'The five-year plan I made 5 years ago'
​ option.html= html;
Transporter.sendMail(option, function(error, response){
          if(error){
console.log("fail: " error);
         }else{
console.log("success: " response.message);
}
});
}

//Call to send email
sendmail("Email content:
My goal for 2015 is to accomplish the goals of 2014 which I should have done in 2013 because I made a promise in 2012 & planned in 2011!");

See more: nodemailer

3. nodejs scheduled tasks

There are many ways to use this. If you are familiar with Linux crontab syntax, this will be even simpler. This example of my Zou is very harmonious, haha:

Copy code The code is as follows:

var schedule = require('node-schedule');

/*Method 1:
Specify a certain time to execute the task
*/
var schedule = require('node-schedule');
var date = new Date(2014, 12, 31, 16, 1, 0);

var j = schedule.scheduleJob(date, function(){
console.log('2015 will soon come.');
});

/*Method 2:
How many minutes of each hour to execute
*/
var rule = new schedule.RecurrenceRule();
rule.minute = 1;
var j = schedule.scheduleJob(rule, function(){
console.log('I'm very happy now!');
});

/*Method 3:
Similar to crontab
*/
var j = schedule.scheduleJob('1 * * * *', function(){
console.log('It's time to afternoon tea!');
});

The running result is more harmonious, haha:

Don’t wonder why the first scheduled task is not executed, because this is Greenwich Mean Time, it needs to wait 8 hours before executing. Haha~~

See more: node-schedule

After listening to sad music for a day, the more I listen to it, the happier I become. Haha