i am sending following text in body parameter
[{"full_image":"alskdfhlkjasvbuialsdvlasljkvbaslvjhbalfdghbakjldfgjlajkshfiuqr","type":"jpg"},{"full_image": "alskdfhlkjasvbuialsdvlasljkvbaslvjhbalfdghbakjldfgjlajkshfiuqr","type":"jpg"}]
and then parsing it JSON.pasrebut i am unable get get lenght and loop the json. following is the code.
var images = req.body.images;
JSON.parse(images, function(key,value){
var counter = key.length;
var seaWeedPicture = {};
var base64FullImage = value;
seaweedfs.write(new Buffer(base64FullImage, 'base64')).then(function (pic) {
var seaWeedPicture = {
picture: config.seaWeedURL + '/' + pic.fid
};
}).catch(function(err){
console.log(err);
res.format({
json: function () {
res.send({
status: 200,
data: []
});
}
});
});
the generated error is [TypeError: must start with number, buffer, array or string]
You can get length by Object constructor
var length=Object.keys(images).length;
//Do your loop with `length`
console.log(Object.keys(images).length);//2
var record = [{"full_image":"alskdfhlkjasvbuialsdvlasljkvbaslvjhbalfdghbakjldfgjlajkshfiuqr","type":"jpg"},{"full_image": "alskdfhlkjasvbuialsdvlasljkvbaslvjhbalfdghbakjldfgjlajkshfiuqr","type":"jpg"}]
console.log(record.length);
for(var i=0;i<record.length;i++){console.log(record[i]['full_image']);}
Do like this:
Related
I am using script.google.com to create a custom connector that can read CSV data from drive.google.com and send the data to Googles data studio.
When running the connector and inserting a simple table inside the data studio, I receive a simple that the request could not be processed because of an server error. The error id is changing every time I "re-publish" the script.
This is
function getData(request) {
var dataSchema = [];
request.fields.forEach(function(field) {
for (var i = 0; i < csvDataSchema.length; i++) {
if (csvDataSchema[i].name === field.name) {
dataSchema.push(csvDataSchema[i]);
break;
}
}
});
csvFile = UrlFetchApp.fetch("https://drive.google.com/uc?export=download&id=" + request.configParams.documentId);
var csvData = Utilities.parseCsv(csvFile);
var data = [];
csvData.forEach(function(row) {
data.push({
values: row
});
});
console.log( {
schema: dataSchema,
rows: data
} );
return {
schema: dataSchema,
rows: data
};
};
This is the csvDataSchema:
var csvDataSchema = [
{
name: 'date',
label: 'Date',
dataType: 'STRING',
semantics: {
conceptType: 'DIMENSION'
}
},
{
name: 'nanoseconds',
label: 'nanoseconds',
dataType: 'NUMBER',
semantics: {
"isReaggregatable": true,
conceptType: 'METRIC'
}
},{
name: 'size',
label: 'Size of Testfile in MByte',
dataType: 'STRING',
semantics: {
"isReaggregatable": false,
conceptType: 'DIMENSION'
}
}
];
And this is the result of the getData function, stringified:
{"schema":[{"name":"date","label":"Date","dataType":"STRING","semantics":{"conceptType":"DIMENSION"}},{"name":"size","label":"Size of Testfile in MByte","dataType":"STRING","semantics":{"isReaggregatable":false,"conceptType":"DIMENSION"}}],"rows":[{"values":["2017-05-23",123,"1"]},{"values":["2017-05-23",123,"1"]}]}
It perfectly fits to the reference. I am providing more information, but following the tutorial it should work, anyways.
Those are the fields provided in request:
And this is what getDate returns:
So, what I am wondering first is: Why is there a random error id? And what could be wrong with my script?
You should only return fields/columns included in request. Currently, data contains all fields that are in csvFile. Depending on your chart element in your dashboard, request will most likely contain only a subset of your full schema. See example implementation at the Data Studio Open Source repo.
If this does not solve the problem, you should setup error handing and check if the error is occurring at any specific line.
#Minhaz Kazi gave the missing hint:
As I did not "dynamically" filled the response object in getData, I always returned all three columns.
With my code above the only thing I had to do is adding the third column as a dimension or a metric.
So I changed my code to dynamically return the columns so it will fit to the response. For this I had to implement an function that will transform the CSV-data into an object.
This is the getData() function now:
function getData(request) {
var url = "https://drive.google.com/uc?export=download&id="
+ request.configParams.documentId;
var csvFile = UrlFetchApp.fetch(url);
var csvData = Utilities.parseCsv(csvFile);
var sourceData = csvToObject(csvData);
var data = [];
sourceData.forEach(function(row) {
var values = [];
dataSchema.forEach(function(field) {
switch(field.name) {
case 'date':
values.push(row.date);
break;
case 'nanoseconds':
values.push(row.nanoseconds);
break;
case 'size':
values.push(row.size);
break;
default:
values.push('');
}
});
data.push({
values: values
});
});
return {
schema: dataSchema,
rows: data
};
};}
And this is the function to convert the CSV data to an object:
function csvToObject(array) {
var headers = array[0];
var jsonData = [];
for ( var i = 1, length = array.length; i < length; i++ )
{
var row = array[i];
var data = {};
for ( var x = 0; x < row.length; x++ )
{
data[headers[x]] = row[x];
}
jsonData.push(data);
}
return jsonData;
}
(it's based on a so-solution from here, I modified it to fit my source CSV data)
I have this JSON.stringify(array) result: ["id:1x,price:150","id:2x,price:200"] and I have to convert it in a json format similar to this (it would be sent to php):
[{
"id":"1x",
"price":150
},
{
"id":"2x",
"price":200
}]
Please help.
You can convert the structure of your data before using JSON.stringify, for example you can convert the data to a list of objects like so:
var strItems = ["id:1x,price:150", "id:2x,price:200"];
var objItems = [];
for (var i = 0; i < strItems.length; i++) {
var pairs = strItems[i].split(",");
objItems.push({
id: pairs[0].split(':')[1],
price: parseInt(pairs[1].split(':')[1])
});
}
Before calling JSON.stringify to get the result you're after:
var json = JSON.stringify(objItems);
console.log(json);
JSON.stringify(array) only does on layer, but you can change the stringify function to work for multiple layers with this function written by JVE999 on this post:
(function(){
// Convert array to object
var convArrToObj = function(array){
var thisEleObj = new Object();
if(typeof array == "object"){
for(var i in array){
var thisEle = convArrToObj(array[i]);
thisEleObj[i] = thisEle;
}
}else {
thisEleObj = array;
}
return thisEleObj;
};
var oldJSONStringify = JSON.stringify;
JSON.stringify = function(input){
if(oldJSONStringify(input) == '[]')
return oldJSONStringify(convArrToObj(input));
else
return oldJSONStringify(input);
};
})();
Once you have declared this, then you can call JSON.stringify(array)
I created a test server that sends chunks of stringified JSON. When I connect to the server it sends invalid JSON and for the life of me I can't figure out why. The output adds an extra double quotation mark.
Server code:
const net = require('net'),
server = net.createServer(function(connection) {
console.log('subscriber connected.');
// send first chunk immediately
connection.write('{"type":"changed","file":"targ"');
let timer = setTimeout(function() {
connection.write('et.txt","timestamp":1358175758495}' + '\n');
connection.end();
}, 1000);
connection.on('end', function() {
clearTimeout(timer);
console.log('subscriber disconnected');
});
});
server.listen(5432, function() {
console.log('test server listening for subs...')
});
ldj.js
'use strict';
const
events = require('events'),
util = require('util'),
// client constructor
LDJClient = function(stream) {
events.EventEmitter.call(this);
let self = this;
let buffer = '';
stream.on('data', function(data) {
buffer += data;
console.log(buffer)
let boundary = buffer.indexOf('\n');
while(boundary !== -1) {
let input = buffer.substr(0, boundary);
buffer = buffer.substr(boundary + 1);
//self.emit('message', JSON.parse(input));
boundary = buffer.indexOf('\n');
}
});
};
util.inherits(LDJClient, events.EventEmitter);
// expose module methods
exports.LDJClient = LDJClient;
exports.connect = function(stream) {
return new LDJClient(stream);
};
Output:
{"type":"changed","file":"targ"
{"type":"changed","file":"targ"et.txt","timestamp":1358175758495}
That extra " should not be in "target.txt" value. Any ideas?
TIA
rathern than splitting string manualy try to get whole string and split it to chunks and then send it:
var data = '{"type":"changed","file":"target.txt","timestamp":1358175758495}';
var chunks = data.match(/.{1,10}/g); // 10 symbol chunks
for(var i = 0; i < chunks.length; i++) {
var chunk = chunks[i];
setTimeout(function() {
if(connection) {
connection.write(chunk+'\n');
if(i + 1 == chunks.length) {
connection.end();
}
}
}, i*1000);
}
connection.on('end', function() {
console.log('subscriber disconnected');
});
I want to slice a JSON array, but get the following error:
Object # has no method 'slice'
The following is my code:
$scope.getPagedDataAsync = function (pageSize, page, searchText) {
setTimeout(function () {
var data;
programService.query({
id: $routeParams.id
}, function (result) {
data = {
'program': result
};
data = JSON.stringify(data);
data = JSON.parse(data);
$scope.setPagingData(data,page,pageSize);
});
}, 100);
};
$scope.setPagingData = function(data, page, pageSize){
var pagedData = data.slice(0, 3);
$scope.myData = pagedData;
$scope.totalServerItems = data.length;
if (!$scope.$$phase) {
$scope.$apply();
}
};
JSON data:
{programId:1,
programName:project1,
programContent:content1,
programStartDate:2012-01-01,
templateId: '1'}
I want to slice the array as follows: programId, 1, programName, project1, ...
I am so confused , please help.
Try
var data = {
programId:1,
programName:'project1',
programContent:'content1',
programStartDate:'2012-01-01',
templateId: '1'
}
var array = [];
for(var key in data){
if(!data.hasOwnProperty(key)){
continue;
}
array.push(key, data[key])
}
console.log(array, array.slice(0, 4))
I have two textbox(goalText and goalText1) and a button(goalreach) in my html.
My aim : When I enter numeric value in 1 textbox(goalText), it should be converted to json and be stored. So even after 5 days when I run the application, it should be stored. Now when I enter the numeric value, in other textbox(goalText1) and it matches, I am simply displaying the message match. This is the demo, I am trying so that I can know that value can be stored in json and can be retrieved when necessary. I have written the code as follow:
$("#goalreach").click(function () {
var contact = new Object();
contact.goalDist = "$("#goalText.value ").val()";
var jsonText = JSON.stringify(contact);
if (jsonText == ($("#goalText1.value").val())) {
document.getElementById('divid').innerHTML = 'Match';
}
});
I know, I have made many simple mistakes of brackets and " too, but I am a newbie, If you can help me out.
First, you have to compare either 2 objects or 2 strings, and in goalDist, you should store the value (BTW, you get the jQuery object with $("#goalText") and the value with somejQueryObject.val() moreover this is generally equivalent to document.getElementById("goalText").value)...
This can be done like this :
$("#goalreach").click(function () {
// Create an object with the single property "goalDist"
var contact = { goalDist : $("#goalText").val() };
// Makes it be a string (it will in this simple example : `"{"goalDist":<the value of goalTest>}"`
var jsonText = JSON.stringify(contact);
// Creates a string from an equivalent object bound on the second field
var jsonText2 = JSON.stringify({ goalDist : $("#goalText2").val() });
// Compares the 2 strings
if (jsonText === jsonText2) {
document.getElementById('divid').innerHTML = 'Match';
}
});
TRY THIS
$("#goalreach").click(function () {
var contact = new Object();
var goalDist = '$("#goalText.value").val()';
var jsonText = JSON.stringify(contact.goalDist);
if(jsonText==($("#goalText1.value").val()))
{
document.getElementById('divid').innerHTML = 'Match';
}
});
Try the following code:
$("#goalreach").click(function () {
var contact = new Object();
contact.goalDist = $("#goalText").val();
var jsonText = JSON.stringify(contact);
if (jsonText == ($("#goalText1").val())) {
document.getElementById('divid').innerHTML = 'Match';
}
});
OR
$("#goalreach").click(function () {
var goalText = $("#goalText").val();
var goalText1 = $("#goalText1").val();
if (goalText == goalText1) {
document.getElementById('divid').innerHTML = 'Match';
}
});