Javascript Variable assignment from remote text file

Question

I am having an html file with javascript code. I am having a variable like

 var testData={
        max: 27,
        data: [ {lat: 20.7300, lng: 81.2000, count: 5},     
                {lat: 21.6700, lng: 82.1700, count: 7},     
                {lat: 23.7579 , lng:83.6866, count: 2},     
                {lat: 19.0667, lng: 82.0331, count: 10},    
                {lat: 21.7197 , lng:81.5375, count: 6},     
                {lat: 18.8000 , lng:80.8166, count: 5},     
                {lat: 22.0900 , lng:82.1500, count: 60},    
                {lat: 18.9000 , lng:81.3500, count: 4},     
                {lat: 20.7072 , lng:81.5497, count: 9},     
                {lat: 21.1833 , lng:81.2833, count: 7},     
                {lat: 20.6330 , lng:82.0623, count: 3},     
                {lat: 22.9000 , lng:84.1500, count: 3},     
                {lat: 22.0170 , lng:82.5670, count: 80},    
                {lat: 19.6000 , lng:81.6700, count: 7},     
                {lat: 22.3500 , lng:82.6800, count: 8},     
                {lat: 23.2500 , lng:82.5500, count: 8},     
                {lat: 20.2719 , lng:81.4931, count: 10},    
                {lat: 22.0200 , lng:81.2500, count: 3},     
                {lat: 21.1000 , lng:82.1000, count: 0},     
                {lat: 22.0700 , lng:81.6800, count: 9},     
                {lat: 19.7149 , lng:81.2455, count: 2},     
                {lat: 21.9000 , lng:83.4000, count: 3},     
                {lat: 21.1000 , lng:81.0300, count: 5},     
                {lat: 21.2447 , lng:81.6352, count: 100},   
                {lat: 23.2200 , lng:82.8500, count: 1},     
                {lat: 18.4000 , lng:81.6667, count: 8},     
                {lat: 23.1167 , lng:83.2000, count: 0 }]    
    };

I want to get the value of this variable from a remote text file like data.txt and use it. Please guide me how to achieve this.

After your responses I tried this

var testData
$.ajax({
 dataType: "json",
 url: 'data.txt',
 success: function(json_data)
   {
      testData = JSON.parse(json_data);
   }});

I have stored my data in the same directory. I am not getting the desired result please help.

comment out the line that starts with "testData..." and add this: console.log(json_data) then look at the console and see what it says. — Brian McGinity
– Brian McGinity, Commented Mar 12, 2014 at 9:34

aadel · Accepted Answer · 2014-03-12 06:50:19Z

1

You need these steps:

Save the data to a text file (without variable name), i.e. the text file would contain:

    {
        max: 27,
        data: [ {lat: 20.7300, lng: 81.2000, count: 5},     
            {lat: 21.6700, lng: 82.1700, count: 7},
    ....
    }

Copy the text file to the remote server.
From JavaScript, make an AJAX call with $.get() function to get the contents of the file and parse it with JSON.parse() function.

edited Mar 12, 2014 at 6:50

answered Mar 12, 2014 at 6:41

aadel

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2 Comments

Avinash Sahu Over a year ago

Hi Ahmed I have edited the question, How I am doing it. Its now working.

aadel Over a year ago

As you are using dataType: "json", you don't need JSON.parse(). json_data is the object you need to access directly.

Shijin TR · Accepted Answer · 2014-03-12 06:31:39Z

0

Use jQuery Ajax method,If your file contain value in Json format

   $.ajax({
     dataType: "json",
     url: 'path_to/data.txt',
     success: function(json_data)
       {
          //json_data contain text file content
       }
   });

answered Mar 12, 2014 at 6:31

Shijin TR

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4 Comments

Brian McGinity Over a year ago

It's not valid json, so what now? eval?

Shijin TR Over a year ago

@BrianMcGinity,What type content?

Brian McGinity Over a year ago

@shijn huh? I am just saying his file is not valid json. So once it was brought into the success function, what would you do? It looks like the only thing you could do with the data at that point to make it a js variable is to eval() it, which is just a bad idea all around. So unless he could change his .txt file, there are not very good options.

Avinash Sahu Over a year ago

@BrianMcGinity I tried eval also. its not working. I used data type as text.

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