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HTML form upload file from url image using JavaScript

Some background information:
Users are able to input some book information and upload book cover image file through HTML form. Before they input information manually, they could use Google Book API to find some information, and by just click a button, some fields will be automatically filled using the information from Google Book API. For book cover image, Google API returns the image url, so I am trying find a way to transfer this url to a file object. Therefore, when users click the button to fill form using information from Google API, the image will be automatically uploaded there from image url.
I have an image url such as: http://books.google.com/books/content?id=L2byvgEACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api
And I created an HTML form that allows users to upload their images.
<div class="form-group">
<label for="book cover">Book Cover</label>
<input type="file" class="form-control" name="book cover" accept="image/*" required>
</div>
Now I want to use JavaScript to transfer the image url to a file object and then prefill this file input for some users.
How can I achieve this using JavaScript? Thanks!

For your case, I think you must save the link to input hidden and submit to server side to get that image.
If you want to show the preview for user, just create a <img src=" http://books.google.com/books/content?id=L2byvgEACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api" /> on your form.
Put hidden input to keep the link from user:
<input type="hidden" name="image-url" value="http://books.google.com/books/content?id=L2byvgEACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api">
<img src="http://books.google.com/books/content?id=L2byvgEACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api"/>
And then, you have to take action download this image on your server side.

Please use below code to make it working :
Function
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(e) {
$('#blah').attr('src', e.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
$("#imgInp").change(function() {
readURL(this);
});
HTML Form view
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form runat="server">
<input type='file' id="imgInp" />
<img id="blah" src="#" alt="your image" />
</form>

How to display preview of files after choose file?

I have upload documents button, from where I can upload images, docs, pdf files and excels. I want to display preview of these selected files.
I am able to display preview of images and PDF files, but not getting how to display preview if file is doc or excel file.
Here is my generic code for displaying preview of a file.
HTML Code is:
<input type="file" name="medical_doc" multiple="multiple" onchange="PreviewDocument('wildlife');" id="preview_animal_doc_wildlife">
JS Code is:
function PreviewDocument(type) {
var outerDiv = document.createElement("DIV");
outerDiv.setAttribute("class", 'col-md-2 document-col');
outerDiv.setAttribute("id", 'append_animal_doc_preview_div');
var outerImage = document.createElement("EMBED");
outerImage.setAttribute("class", 'img-doc');
outerImage.setAttribute("src", e.target.result);
outerDiv.appendChild(outerImage);
}
This code works fine if chosen file is PDF and/or Image, but not working for doc or excel files. Any idea of how to display preview of doc and excel files?

function ReadURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(e) {
$('#imgFile').attr('src', e.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
$(document).ready(function(){
$("#imgInp").change(function() {
ReadURL(this);
});});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="form1" runat="server">
<input type='file' id="imgInp" />
<img id="imgFile" src="#" alt="your image" />
</form>
you are not able to show excel and doc file because browser is not supporting that file preview for that purpose you need extra third party control to render that file in to your browser. without data it is not possible.

If your file was excel you can read it as JSON as here
then choose apart from JSON and show it in table
and if it was doc when you read it with FIleReader() which is builtin javascript
as readAsDataURL the e.target.result will be a string so choose like the first 5 lines and show it in a div.

Submitting Video files in Angular js

I need help in submitting a video file using AngularJS (in an Ionic App) to a PHP server. The code works for images but not videos. A quick hint, I think the name of the file is been sent to the server but when I tried getting the size it shows 0, which means the actual file wasn't sent.
Index.php
<div class="list">
<label>Video clip (for peculiar cases)</label>
<label class="item item-input item-stacked-label">
<input type="file" ng-model="image34" name="image34" id="image34" placeholder="" onchange="angular.element(this).scope().uploadedFile34(this)" valid-file >
</label>
on select the uploadedFile34 function is triggered. see the code below
$scope.uploadedFile34=function(element)
{
$scope.currentFile34= element.files[0];
var reader = new FileReader();
reader.onload = function(event){
$scope.image_source = event.target.result
$scope.$apply(function($scope){
$scope.files34 = element.files;
});
}
reader.readAsDataURL(element.files[0]);
on submitting the form I get the file this way
$scope.image34=$scope.files34[0];
formData.append("image34", $scope.image34);
Using form data which works perfectly for images but not for videos. Please I really need help on this, all efforts to get this done has not helped. Still getting my head round angularjs.

How to show the image uploaded using HTML file control on a new page after form submission in PHP?

I've a form which contains following file upload control and image control:
<form action="rebate_preview.php" role="form" method="post" enctype="multipart/form-data">
<input type="hidden" name="hidden_path" id="hidden_path" value="">
<input type="file" name="rebate_image" id="rebate_image">
<img id="rebate_old_image" src="#" alt="your image" width="80" height="80"/>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
Here I'm enabling the user to see the preview of the image he selected for upload without actually uploading the image to server using following jQuery code :
$(document).ready(function() {
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#rebate_old_image').attr('src', e.target.result);
$('#hidden_path').val(e.target.result)
}
reader.readAsDataURL(input.files[0]);
}
}
$("#rebate_image").change(function(){
readURL(this);
});
});
Now the problems I'm facing is I'm not able to show the same image preview on the next page i.e. on a file "rebate_preview.php" after form submission using image control. The next issue I'm facing is how should I store the values from array $_FILES on the page rebate_preview.php?
Remember still the image uploaded by user is not yet uploaded to the server.
The page rebate_preview.php is just a preview page with some other fields to preview the details.
How should I show this image on the page rebate_preview.php using image control and how should I store the $_FILES array data?

I had this problem a short while back when I was building an application, the best thing to create an OBJECT URL from the selected image when you select the file, you can then set your img src to that OBJECT URL data, which will render it to the page, for example lets say you have a file input with the id image_file. you could do this:
// Preview the image on the page
$('#image_file').change(function(e) {
var selected_file = $('#image_file').get(0).files[0];
selected_file = window.URL.createObjectURL(selected_file);
$('#preview_image').attr('src' , selected_file);
});
The source is now the BLOB representation of the image, you can then submit your form to upload the image or select another image to update the preview, hope this helps :)

Simple Solution?
in PHP script just do:
print "<img src='".$_POST['hidden_path']."'>";

Upload file not working in Chrome extension option page

I am developing a chrome extension with an option page. On that page I put an upload image option but can't get the file to load in javascript. I have tried many solutions (1st solution, 2nd solution ...) but none worked. The strange thing is, that even an "onclick" attribute in the html code doesn't call the corresponding function. Here is an example of the code:
HTML example:
<input type="file" name="uploadImage" id="uploadImage" />
<button type="submit" id="imageUpload-btn" onclick="myFunction();">Upload</button>
javascript example:
jQuery("#imageUpload-btn").click(function(){
var image = new Image();
image.src = jQuery("#uploadImage").val();
alert(image.src);
image.onload = function(){
alert("on load");
}
image.onerror = function(){
alert("error");
}
});
I get the path of the file in the first alert, but then always the error alert. The function "myFunction()" is not called, but if I open the file directly in a browser the "onclick" trigger works and "myFunction()" is called.
What am I doing wrong or what am I missing?

<form name="Upload" action="#" enctype="multipart/form-data" method="post">
<p>Filename: <INPUT type="file" name="submitfile" id = "submitfile" />
<INPUT type="button" value="Send" onClick="checkSize();" />
</form>
here you are using enctype="multipart/form-data" in this type we dont have opertunity to use
im.src = document.getElementById('submitfile').value;
you need to go for apache.commons.fileupload ServletFileUpload.isMultipartContent(request); which is totally java related.