有一个Nodejs脚本可以逐个读取一组文件。并且对于每个文件,逐行阅读文档,读完一行后,它会使http post需要将该行发送到远程服务器。然后阅读下一行。问题是脚本会错过一些行。nodejs读取文件并发出http请求
谢谢。
看来lr.pause();
只是隐藏line
事件,而不是暂停读取文件的过程。
var fs = require('fs');
var http = require('http');
var JSON = require('JSON');
var S = require('string');
var uuid = require('node-uuid');
var readline = require('readline');
var httpsync = require('httpsync');
var LineByLineReader = require('line-by-line');
var sleep = require('sleep');
function postES(_path,data,id,lr){
var post_data = JSON.stringify(data);
var post_options = {
host: _host,
port: _port,
path: _path,
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': post_data.length
}
};
var post_req = http.request(post_options, function(res) {
res.setEncoding('utf8');
res.on('data', function(data) {
console.log(data);
});
res.on('end', function() {
console.log("end");
// resume read line
lr.resume();
});
});
post_req.on('error', function(data) {
console.log("error,post."+data+post_data);
// resume read line
lr.resume();
});
post_req.write(post_data);
post_req.end();
}
function readlineFunSession(line,id,lr) {
var _data={};
// compose _data object
postES('/cs/session/'+_data["sessionid"],_data,id,lr);
}
function readfileFun(files,start,end,id,readlineFun) {
if(start<end && start<files.length){
var lr = new LineByLineReader(files[start],{encoding:'utf8',skipEmptyLines:true});
lr.on('error', function (e) {
console.log('error,LineByLineReader.'+e.toString());
});
lr.on('line', function (line) {
// pause read line
lr.pause();
try{
readlineFun(line,id,lr);
}catch(e){
console.log('error,line.'+e.toString());
}
});
lr.on('end', function() {
readfileFun(files,++start,end,id,readlineFun);
});
}
}
// var files is an arry of files
// this function try to go throgh file[0],file[1],file[2],......,file[10],
readfileFun(files,0,10,"ID-1",readlineFunSession);