phantomjs javascript逐行读取本地文件 [英] phantomjs javascript read a local file line by line

问题描述

我从来没有使用过javascript来逐行读取文件，而phantomjs对我来说是一个全新的游戏。我知道幻像中有一个read（）函数，但我不完全确定在将数据存储到变量后如何操作数据。我的伪代码类似于：

I've never used javascript to read a file line by line, and phantomjs is a whole new ballgame for me. i know that there is a read() function in phantom, but I'm not entirely sure how to manipulate the data after storing it to a variable. My pseudocode is something like:

filedata = read('test.txt');
newdata = split(filedata, "\n");
foreach(newdata as nd) {

  //do stuff here with the line

}

如果有人可以帮我解决真正的代码语法问题，我对phantomjs是否会接受典型的javascript或者什么感到困惑。

If anyone could please help me with real code syntax, I'm a bit confused as to whether or not phantomjs will accept typical javascript or what.

推荐答案

我不是JavaScript或PhantomJS专家，但以下代码适用于我：

I'm not JavaScript or PhantomJS expert but the following code works for me:

/*jslint indent: 4*/
/*globals document, phantom*/
'use strict';

var fs = require('fs'),
    system = require('system');

if (system.args.length < 2) {
    console.log("Usage: readFile.js FILE");
    phantom.exit(1);
}

var content = '',
    f = null,
    lines = null,
    eol = system.os.name == 'windows' ? "\r\n" : "\n";

try {
    f = fs.open(system.args[1], "r");
    content = f.read();
} catch (e) {
    console.log(e);
}

if (f) {
    f.close();
}

if (content) {
    lines = content.split(eol);
    for (var i = 0, len = lines.length; i < len; i++) {
        console.log(lines[i]);
    }
}

phantom.exit();

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