I'm working on an embedded device (ESP32) serving static pages from the internal flash (SPIFFS). I'm looking for a simple way to populate the form values with the actual values since with this approach they are loaded with the default values.
I have a working XMLHttpRequest communication channel. For example I'm able to POST the form values retrieving them with:
document.getElementById("form-controls").onsubmit = function (event) {
event.preventDefault();
fetch("/controls", {
method: 'post',
body: new FormData(document.getElementById("form-controls"))
}).then(function(response) {
});
}
I wondering if there's the opposite function. Using a GET method on the same url I would answer from my MCU with the actual values to be written in the form fields.
I'm able to do this manually using JSON and updating each input tag via javascript.
My question is if there is an equivalent of FormData that given an input data can fill automatically the related form fields.
Related
I have made a custom Wordpress post type recepies and I'm trying to use them in a separate JS file but can't find an easy way to access them? (I'm also using JQuery if that makes it easier?)
You can access the data of your custom post types in a javascript file using Rest API and jQuery.
For example, you want to display the ID of your recipe in a div with the class of "the_id" and the title of the recipe in a div with the class of "the_title". Moreover I'm assuming your post type has the name of "recipes" and we just want to get one recipe.
$(document).ready(function() {
$.ajax({
url: "http://yoururl.com/wp-json/wp/v2/recipes?per_page=1"
}).then(function(data) {
$('.the_id').append(data[0].id);
$('.the_title').append(data[0].title.rendered);
});
});
You can reduce the number of posts you are getting with the "per_page" parameter.
In data you can now access everything the Rest API gives you, in the example the ID (via data.id) and the title (via data.title.rendered).
This might interest you: https://developer.wordpress.org/rest-api/reference/
Here the fields you can access by default: https://developer.wordpress.org/rest-api/reference/posts/
I have a form on form-window, and inside form window I have a form with many fields and one upload button. When try to submit form using Ajax.request I have got textfield value but can not get file data. Except filename.
var fd = Ext.getCmp('users-form').form;
var fileInput = document.getElementById('company_logo');
console.log(fd.getEl().dom.files);
params = {
name : fd.findField('name').getValue(),
login : fd.findField('login').getValue(),
email : fd.findField('email').getValue(),
password : fd.findField('password').getValue(),
password_repeat : fd.findField('password_repeat').getValue(),
id : fd.findField('id').getValue()
company_logo : fd.findField('logo').getValue()
}
console.log(params);
Ext.Ajax.request({
url: Scada.reqUrl('users', 'save'),
method: 'post',
params: {
data: Ext.encode(params)
},
success: function() {
console.log('in success');
},
failure: function() {
console.log('in failure');
}
});
Here logo is input type file. I want to send logo data with ajax request. Please help me to figure out the problem. Thanks
Not sure why you started a new question instead of editing Encode form data while fileupload true in Extjs Form Submit as this seems to be the same problem.
Assuming logo is your file upload field you are trying to get the file data using getValue does not actually return the file content (if you use modern there is a getFiles method which returns the selected file objects).
General problems with your approach:
As I stated in my original answer it is not a good idea to send files in a standard ajax request. In your case those problems are:
If you expect getValue to return file contents, you are potentially encoding binary data into a JSON string. This will maybe work but create a large overhead and as the only available JSON datatype that could handle this content is string your parser would have to guess that property company_logo contains binary data and needs to be somehow converted into some sort of file reference.
You are sending files without metadata, so when just adding the raw content into your JSON string you would not be able to detect the expected file type without testing the file in multiple ways
As far as I know you would not be able to access the file content in classic toolkit at all
Submitting the data as a form: In your original question you explained that you submit the form instead of doing Ajax requests which is generally the preferred way.
When you submit a form that contains a file upload field the form will automatically be submitted as multipart/form-data the raw files are added to the request body with it's original content while preserving metadata collected by the browser.
If you look at https://docs.sencha.com/extjs/7.0.0/modern/Ext.Ajax.html#method-request you would have to set isUpload to true and use the form proeprty instead of params, passing a reference to the parent form.
There are lots of inputs in a single page... These inputs are need to be posted to server to generate custom documents. In other words, every each element will be used on serverside.
Traditionally
Every input can have a name. So, at server-side php can get all these inputs by
$_POST[nameOfInput]
Or
Every input tag can be listened by jquery and on change, values can be saved to an array and post to server by ajax later ... so php can get these values as in javascript ... by
$.ajax({
url: baseUrl+"chat.php",
data: a,
type: 'post',
success: function(data) {
alert(data);
}
})
But in this project i got little bit confused about these method because;
On this page, number of the inputs and number of input types are dynamic. While user fills the input. According to values typed by user,simultaneously, new input elements are generated. So i am able to post these values to server but i dont have any idea about how to use these in a php page.
I'm trying to create a note taking web app that will simply store notes client side using HTML5 local storage. I think JSON is the way to do it but unsure how to go about it.
I have a simple form set up with a Title and textarea. Is there a way I can submit the form and store the details entered with several "notes" then list them back?
I'm new to Javascript and JSON so any help would be appreciated.
there are many ways to use json.
1> u can create a funciton on HTML page and call ajax & post data.
here you have to use $("#txtboxid").val(). get value and post it.
2> use knock out js to bind two way.and call ajax.
here is simple code to call web app. using ajax call.
var params = { "clientID": $("#txtboxid") };
$.ajax({
type: "POST",
url: "http:localhost/Services/LogisticsAppSuite.svc/Json/GetAllLevelSubClients",
contentType: 'application/json',
data: JSON.stringify(params),
dataType: 'json',
async: false,
cache: false,
success: function (response) {
},
error: function (ErrorResponse) {
}
I have written a lib that works just like entity framework. I WILL put it here later, you can follow me there or contact me to get the source code now. Then you can write js code like:
var DemoDbContext = function(){ // define your db
nova.data.DbContext.call(this);
this.notes=new nova.data.Repository(...); // define your table
}
//todo: make DemoDbContext implement nova.data.DbContext
var Notes = function(){
this.id=0; this.name="";
}
//todo: make Note implement nova.data.Entity
How to query data?
var notes = new DemoDbContext().notes.toArray(function(data){});
How to add a note to db?
var db = new DemoDbContext();
db.notes.add(new Note(...));
db.saveChanges(callback);
Depending on the complexity of the information you want to store you may not need JSON.
You can use the setItem() method of localStorage in HTML5 to save a key/value pair on the client-side. You can only store string values with this method but if your notes don't have too complicated a structure, this would probably be the easiest way. Assuming this was some HTML you were using:
<input type="text" id="title"></input>
<textarea id="notes"></textarea>
You could use this simple Javascript code to store the information:
// on trigger (e.g. clicking a save button, or pressing a key)
localStorage.setItem('title', document.getElementById('title').value);
localStorage.setItem('textarea', document.getElementById('notes').value);
You would use localStorage.getItem() to retrieve the values.
Here is a simple JSFiddle I created to show you how the methods work (though not using the exact same code as above; this one relies on a keyup event).
The only reason you might want to use JSON, that I can see, is if you needed a structure with depth to your notes. For example you might want to attach notes with information like the date they were written and put them in a structure like this:
{
'title': {
'text':
'date':
}
'notes': {
'text':
'date':
}
}
That would be JSON. But bear in mind that the localStorage.setItem() method only accepts string values, you would need to turn the object into a string to do that and then convert it back when retrieving it with localStorage.getItem(). The methods JSON.stringify will do the object-to-string transformation and JSON.parse will do the reverse. But as I say this conversion means extra code and is only really worth it if your notes need to be that complicated.
I want to encrypt some data in a form using jQuery before it's sent to the server, it can be a MD5 hash. It is a small project, so I don't really need to use SSL.
I have the following JavaScript code where I use $.md5 in the password confirmation info:
$(document).ready(function() {
var dataToSend = {};
dataToSend['action'] = 'signup';
dataToSend['name'] = name.val();
dataToSend['email'] = email.val();
dataToSend['confsenha'] = $.md5(pass2.val());
var options = {
target: '#error',
url: 'insert.php',
beforeSubmit: validate,
data: dataToSend,
success: function(resposta) {
$('#message').html(resposta);
}
};
$('#customForm').ajaxForm(options);
});
The problem is that the data is being duplicated. I tought that overwriting the data being sent by using the var dataToSend would make ajaxForm send only data in that map. But besides sending data from dataToSend, it also sends data from the form, so what I wanted to encrypt using MD5 appears both encrypted and clean. This is an example of what goes in the request:
usuario=user&email=user%40email.com&senha=12345&confsenha=12345&send=&action=signup&name=user&email=user%40email.com&confsenha=d41d8cd98f00b204e9800998ecf8427e
I know I have to define the a function beforeSerialize, but I don't know how to manipulate form data. Can anyone tell me how to do that?
As per the documentation on the plugin site:
data
An object containing extra data that should be submitted
along with the form.
The word along is the crux.
So when you pass data as a part of the options object that data is serialized and is sent along with any data/input elements values that are part of a form.
A better approach would be to hash the password value and assign it to the same field or another hidden field in the beforeSubmit handler(in your case the validate function) and remove the dataToSend object totally.
Something like:
Without any hidden element:
function validate(){
//Other Code
pass2.val($.md5(pass2.val()));
}
With a hidden element in the form:
function validate(){
//Other Code
$("#hdnPass").val($.md5(pass2.val()));
pass2.val("");
}