Develop Reference

Postman: Get data from JSON file in Pre-request Script

I am trying to find a way to use data from my .json file in the pre-request script in Postman.
As you can see in the code below I am using a loop for my request.
In my pre-request script i would like to use "id_group":"14803,14805" from my file Data.json instead of id_group = ["14803","14805"];.
Thanks
URL:
.../group/{{id_of_group}}/members
Body:
{
"id_user": {{id_user}}
}
Pre-request script:
var id_group = pm.environment.get("id_group");
if (!id_group) {
id_group = ["14803","14805"];
}
var currentIdGroup = id_group.shift();
pm.environment.set("id_of_group", currentIdGroup);
pm.environment.set("id_group", id_group);
Tests:
var id_group = pm.environment.get("id_group");
console.log(id_group);
if (id_group && id_group.length > 0) {
postman.setNextRequest('Add user to groups');
} else {
postman.setNextRequest();
}
Data.json file:
[{
"id_user":47091,
"id_group":"14803,14805"
}]

You are creating an Array-Object. But the pm.environment.set() stores only strings.
You must convert them into strings with JSON.stringify().
Instead of pm.environment.set("id_of_group", currentIdGroup); i would suggest
pm.environment.set("id_of_group", JSON.stringify(currentIdGroup));
And backwards the same. If you are loading from the env vars, you have to parse your stringified objects:
JSON.parse(pm.environment.get("id_group"));

I have just found an answer.
In the pre-request script I use the variable id_group, this variable is used to get the id's which are going to be used in the loop.
I found pm.iterationData.get();, it will take the data from the JSON file. Instead of id_group = ["14803","14805"]; I use pm.iterationData("id_group").
My pre request script look like this now:
var id_group = pm.environment.get("id_group");
if (!id_group) {
id_group = pm.iterationData.get("id_group");
}
var currentIdGroup = id_group.shift();
pm.environment.set("id_of_group", currentIdGroup);
pm.environment.set("id_group", id_group);
And I cheat a little, my JSON look like this now:
[{
"id_user":47091,
"id_group":["14803","14805"]
}]

Javascript parse json from URL

Trying to parse a json response from URL in javascript.
Here is what the response looks like
{"data":[{"version":"7.4.0","startDate":"2016-12- 12","totalSessions":"6208723","totalCrashes":"2944","crashRate":"0.047"},{"version":"7.4.0","startDate":"2016-12-11","totalSessions":"4979676","totalCrashes":"2378","crashRate":"0.048"},{"version":"7.4.0","startDate":"2016-12-10","totalSessions":"534913","totalCrashes":"208","crashRate":"0.039"},{"version":"7.4.0","startDate":"2016-12-09","totalSessions":"309564","totalCrashes":"147","crashRate":"0.047"},{"version":"7.4.0","startDate":"2016-12-08","totalSessions":"255597","totalCrashes":"162","crashRate":"0.063"},{"version":"7.4.0","startDate":"2016-12-07","totalSessions":"21379","totalCrashes":"12","crashRate":"0.056"}]}
I can dump the json output using
var crash = $.post('http://localhost/crash_stats.php', function(data2) {
$('#show-list').html(data2); //shows json
});
Then I tried to parse it using
document.getElementById("placeholder").innerHTML=data2.data[0].version
also tried
obj = JSON.parse(crash);
console.log(obj.data2[0].version);
But no luck.

You should tell jQuery that the AJAX function returns JSON, then it will parse it automatically for you.
var crash = $.post('http://localhost/crash_stats.php', function(data2) {
$("#placeholder").text(data2.data[0].version);
}, 'json');
Or you can call JSON.parse() yourself.
var crash = $.post('http://localhost/crash_stats.php', function(data2) {
var data = JSON.parse(data2);
$("#placeholder").text(data.data[0].version);
});

How to dump json data into json file using Javascript?

I have unformatted data in my data.json file. I have formatted it using javascript. Now I have to dump formatted data into newData.json file. But I am not able to find correct code. Please suggest how can I dump json data into newData.json file.
$.getJSON( "movie.json", function( data ) {
var result = {
Win: {},
Nominated: {}
};
data.forEach( obj => {
var stats = result[obj.WinType][obj.Nominee] = result[obj.WinType][obj.Nominee] || {
count: 0,
rating: 0,
0: 0,
name: obj.Nominee
};
stats.rating += obj.RATING;
stats.count++;
stats[0] += obj.WinProbability * 100;
});
Object.keys(result).forEach( grp =>
result[grp] = Object.keys(result[grp]).map( name => {
var stats = result[grp][name];
stats[0] /= 100;
stats[1] = Math.round(stats.rating * 100 / stats.count) / 100;
delete stats.count;
delete stats.rating;
return stats;
})
);
console.log(result);
});

Lets say you have your new data into the results variable.
You could write the results to a new file and download the same. But you can't write the data to a file on your server. If you need to write data to server then you will have to create an api which gets the data on the server and then it writes the same into a new file which will then be available for you to access from browser just like the file 'movie.json'
Approach 1:
var result = {'your new data'}
var url = 'data:text/json;charset=utf8,' + encodeURIComponent(result);
window.open(url, '_blank');
This will allow you to download the file with the new data.
Approach 2:
You have an API written on server that expects JSON data which will write to a file in the public directory so its available on client.
$.ajax({
type: "POST",
url: '/api/new_data',
data: result,
success: function(){console.log('success')}
});
This is an example of how it can be done. You will have to write your own api to accept the POST request and write to a file.
Hope it helps.

Can I pull JSON from api url and use as json2html input?

I have working on a webpage that displays json data in a html hierarchical structure, using the jQuery plugin json2html.
Currently the json data is entered into a text area and a button is pressed to run the conversion. This is the current function that gets the json from the text area and starts the conversion.
$('#btnVisualize').click(function() {
//Get the value from the input field
var json_string = $('#inputJSON').val();
try
{
//json
//var json = JSON.parse(json_string);
eval("var json=" + json_string);
visualize(json);
}
catch (e)
{
alert("Sorry error in json string, please correct and try again: " + e.message);
}
});
The api that the data is comming from needs a lot of authentication, so I have a seperate javascript file that generates the authenticaton and creates the full url to load the api.
function generateUrl(itemkey) {
var orig = "http://explorerapi.barratthomes.co.uk/v2.0/development/getbyitemkey?ItemKey="+itemkey+"&";
Auth.Auth = createAuth();
var var_pairs = [
{name: "Auth.Utc", val: encodeURI(Auth.Auth.Utc)},
{name: "Auth.RequestId", val: Auth.Auth.RequestId},
{name: "Auth.DeviceId", val: Auth.Auth.DeviceId},
{name: "Auth.Hash", val: Auth.Auth.Hash}];
for(var i=0; i<var_pairs.length; i++) {
orig += (i==0?"":"&")+var_pairs[i].name+"="+var_pairs[i].val;
}
var var_names = ["BrandCode", "ApplicationId", "ApplicationVersion", "LanguageCode", "IsPublished", "MarketingSuiteDevelopmentId", "UserLocation", "Os", "ScreenResolution", "Hierarchical"];
for(var j=0; j<var_names.length; j++) {
orig += "&"+var_names[j]+"="+Auth[var_names[j]];
}
return orig;
}
This is the function that generates the url.
I need to take the url from that function and connect to the api and pass the data directly to the json2html function, so I no longer have to paste the json data into the text area.
I have been looking at $.getJson and $.parseJSON but having no luck, I'm not sure where to go next?

Try this Jsonp to do the fetching the data from the url
function insertIntoTextArea(content) {
document.getElementById('output').innerHTML = content;
}
// create script element
var script = document.createElement('script');
// assing src with callback name
script.src = 'your proper url?callback=insertIntoTextArea';
// insert script to document and load content
document.body.appendChild(script);

You should be able to use $.getJSON like this
$.ajax({
dataType: "json",
url: url,
data: data,
success: success
});
And then just pass the data object to json2html. However, check with the API that you're connecting to http://explorerapi.barratthomes.co.uk/v2.0/development/getbyitemkey as they might require JSONP (which pretty much just performs a callback function to get around CORS).
See http://api.jquery.com/jquery.getjson/
If the URL includes the string "callback=?" (or similar, as defined by the >server-side API), the request is treated as JSONP instead. See the discussion >of the jsonp data type in $.ajax() for more details.

Javascript loading CSV file into an array

I am developing a web page in Wordpress. The webpage needs to have a combobox with all counties. I have a dataset in csv format which has some 10k rows for all these counties.
When the user selects a county in the dropdown, I want only the selected county data displayed in the web page. This is my requirement.
In wordpress, my web page I am adding the js file using
<script type="text/javascript" src="http://xxx/wp content/uploads/2014/05/countyList1.js"></script>
and the code for webpage dropdown is
<select name="county" id="county" onload="setCounties();" onchange="getSelectedCountyData();"></select>
In countyList1.js file I have the setCounties() and getSelectedCountyData() functions.
So far I can see the dropdown with counties list. I don't know how to read the CSV file and apply the selected county filter to this list.
I tried the FileReader object and I can load the CSV contents on the web page but I don't want the user to select the CSV. I have the dataset already.
I am trying to use this jquery.csv-0.71 library from this SO post How to read data From *.CSV file using javascript? but I need help.
Here's the code which gets called when a county is selected
function getSelectedCountyData() {
cntrySel = document.getElementById('county');
//selCty = countyList[cntrySel.value];
handleFiles();
}
function handleFiles() {
$(document).ready(function () {
$.ajax({
type: "GET",
url: "D:\Docs\Desktop\csvfile.csv",
dataType: "csv",
success: function (data) { processData(data); }
});
});
}
function processData(allText) {
var allTextLines = allText.split(/\r\n|\n/);
var headers = allTextLines[0].split(',');
var lines = [];
for (var i = 1; i < allTextLines.length; i++) {
var data = allTextLines[i].split(',');
if (data.length == headers.length) {
var tarr = [];
for (var j = 0; j < headers.length; j++) {
tarr.push(headers[j] + ":" + data[j]);
}
lines.push(tarr);
}
}
console.log(lines);
drawOutput(lines);
}
function drawOutput(lines) {
//Clear previous data
document.getElementById("output").innerHTML = "";
var table = document.createElement("table");
for (var i = 0; i < lines.length; i++) {
var row = table.insertRow(-1);
for (var j = 0; j < lines[i].length; j++) {
var firstNameCell = row.insertCell(-1);
firstNameCell.appendChild(document.createTextNode(lines[i][j]));
}
}
document.getElementById("output").appendChild(table);
}

I highly recommend looking into this plugin:
http://github.com/evanplaice/jquery-csv/
I used this for a project handling large CSV files and it handles parsing a CSV into an array quite well. You can use this to call a local file that you specify in your code, also, so you are not dependent on a file upload.
Once you include the plugin above, you can essentially parse the CSV using the following:
$.ajax({
url: "pathto/filename.csv",
async: false,
success: function (csvd) {
data = $.csv.toArrays(csvd);
},
dataType: "text",
complete: function () {
// call a function on complete
}
});
Everything will then live in the array data for you to manipulate as you need. I can provide further examples for handling the array data if you need.
There are a lot of great examples available on the plugin page to do a variety of things, too.

You can't use AJAX to fetch files from the user machine. This is absolutely the wrong way to go about it.
Use the FileReader API:
<input type="file" id="file input">
js:
console.log(document.getElementById("file input").files); // list of File objects
var file = document.getElementById("file input").files[0];
var reader = new FileReader();
content = reader.readAsText(file);
console.log(content);
Then parse content as CSV. Keep in mind that your parser currently does not deal with escaped values in CSV like: value1,value2,"value 3","value ""4"""

If your not overly worried about the size of the file then it may be easier for you to store the data as a JS object in another file and import it in your . Either synchronously or asynchronously using the syntax <script src="countries.js" async></script>. Saves on you needing to import the file and parse it.
However, i can see why you wouldnt want to rewrite 10000 entries so here's a basic object orientated csv parser i wrote.
function requestCSV(f,c){return new CSVAJAX(f,c);};
function CSVAJAX(filepath,callback)
{
this.request = new XMLHttpRequest();
this.request.timeout = 10000;
this.request.open("GET", filepath, true);
this.request.parent = this;
this.callback = callback;
this.request.onload = function()
{
var d = this.response.split('\n'); /*1st separator*/
var i = d.length;
while(i--)
{
if(d[i] !== "")
d[i] = d[i].split(','); /*2nd separator*/
else
d.splice(i,1);
}
this.parent.response = d;
if(typeof this.parent.callback !== "undefined")
this.parent.callback(d);
};
this.request.send();
};
Which can be used like this;
var foo = requestCSV("csvfile.csv",drawlines(lines));
The first parameter is the file, relative to the position of your html file in this case.
The second parameter is an optional callback function the runs when the file has been completely loaded.
If your file has non-separating commmas then it wont get on with this, as it just creates 2d arrays by chopping at returns and commas. You might want to look into regexp if you need that functionality.
//THIS works
"1234","ABCD" \n
"!#£$" \n
//Gives you
[
[
1234,
'ABCD'
],
[
'!#£$'
]
]
//This DOESN'T!
"12,34","AB,CD" \n
"!#,£$" \n
//Gives you
[
[
'"12',
'34"',
'"AB',
'CD'
]
[
'"!#',
'£$'
]
]
If your not used to the OO methods; they create a new object (like a number, string, array) with their own local functions and variables via a 'constructor' function. Very handy in certain situations. This function could be used to load 10 different files with different callbacks all at the same time(depending on your level of csv love! )

This is what I used to use a csv file into an array. Couldn't get the above answers to work, but this worked for me.
$(document).ready(function() {
"use strict";
$.ajax({
type: "GET",
url: "../files/icd10List.csv",
dataType: "text",
success: function(data) {processData(data);}
});
});
function processData(icd10Codes) {
"use strict";
var input = $.csv.toArrays(icd10Codes);
$("#test").append(input);
}
Used the jQuery-CSV Plug-in linked above.

The original code works fine for reading and separating the csv file data but you need to change the data type from csv to text.