Working on a Multipart File Upload form. Using Java with Servlet 3.0. It seems with multipart, the value of the submit button is not passed to the server?
e.g.
<form method="POST" enctype="multipart/form-data" action="/servlet">
<input type="hidden" name="mode" value="image">
<input type="hidden" name="id" value="123">
<input type="file" name="file" id="file">
<input type="submit" name="action" value="Upload">
<input type="submit" name="action" value="Delete">
</form>
In a regular post, you would just check the value of the "action" parameter. How do you access this in a multipart form? I tried examining the Parts in the request, and it's just not there.
e.g.
Collection<Part> parts = request.getParts();
System.out.println("parts: "+parts.size());
for(Part part : parts){
System.out.println(part.getName());
}
Outputs:
parts: 3
mode
id
file
As in...
String mode = request.getParameter("mode"); //reads "image"
String id = request.getParameter("id"); //read "123"
String action = request.getParameter("action"); //reads null
How do you solve this one?
Have a hidden field declared and set its value based on the Submit button clicked , before you submit , using Javascript
<input type="hidden" name="submitType" value="">
first import multipart jar file in your program then
try to use multipartrequest class for accessing multipart data from your form -
MultipartRequest mpr=new MultipartRequest(request,"C:");
String ad=mpr.getParameter("made"); // read "image"
String ad=mpr.getParameter("id"); // read "123"
String ad=mpr.getParameter("action"); // if u submit from from upload then it read "upload" or submit from delete then it read "delete" String .
Related
I have next form:
<form action="/upload" enctype="multipart/form-data" method="POST">
<input name="example" type="file">
<input type="submit" value="Upload">
</form>
On server side I see that file of size zero is uploaded:
-----------------------------23370864791729106148808009039
Content-Disposition: form-data; name="example"; filename=""
Content-Type: application/octet-stream
-----------------------------23370864791729106148808009039--
How can I check that nothing was selected by user for this file field?
Add required to your input field to make sure an element has been uploaded.
<form action="/upload" enctype="multipart/form-data" method="POST">
<input required name="example" type="file">
<input type="submit" value="Upload">
</form
You can also check via javascript if there is a content given if you don't want to use the required attribute:
function hasContent() {
let fileValue = document.getElementsByName('example')[0].value;
alert(fileValue !== '' ? "has content" : 'no content');
}
<form enctype="multipart/form-data"method="POST">
<input name="example"type="file">
<input type="button"value="Upload"onclick="hasContent();">
</form>
You can use this code into your php file after submit:
if($_FILES['example']['tmp_name'] != null){
//Actions you needed
}
If it returns true it means the file is selected.
I am building a webservice so people can search into the database. Lets say I have users and companies. Each user and company can be found thought their id. So if you search myurl/users/<id> you get information of that user, on the other hand if you search company/ you get information of that company.
For this I have created two simple input texts (one for users and another for companies) where people can type the <id>. My problem is that when I get the value from the input text I get this myrul/users?<id> and not myurl/users/id. I tried to hardcode the slash but then I get myrul/users/?<id>.
So my question is how can I get input text as a url and not as a variable.
I am using flask so my html has jinja2 code like this:
<!-- USER id -->
<form method='GET' action={{url_for('get_info_by_id', type_collection='user')}}>
<input type="text" name="my_id"/><input type="submit" value="Go">
</form>
<!-- COMPANY id-->
<form method='GET' action={{url_for('get_info_by_id', type_collection='company')}}>
<input type="text" name="my_id"/><input type="submit" value="Go">
</form>
In my python script (flask)
#app.route('myurl/<type_collection>/<my_id>')
get_info_by_id(type_collection,my_id):
# search into the database and return info about that id
As #dirn suggested in the commentary, I made it through JavaScript, here is the code if someone else is also interested:
HTML:
<!-- USER id -->
<form method='GET' class="search" id="user" action="">
<input type="text" name="my_id"/><input type="submit" value="Go">
</form>
<!-- COMPANY id-->
<form method='GET' class="search" id="company" action="">
<input type="text" name="my_id"/><input type="submit" value="Go">
</form>
JS:
$(".search").submit(function( event ){
event.preventDefault();
var my_id = $(this).find(":input").val();
url = 'myurl/'+ $(this).attr("id") + '/' + my_id;
window.location.href = url;
});
python (flask)
#app.route('myurl/<type_collection>/<my_id>')
get_info_by_id(type_collection,my_id):
# search into the database and return info about that id
Is there a reason you cannot use the variable, or are you just trying to get it into a URL so that you can do your search? I went out on a limb and assumed you just want the form and database search to work, so try the following out.
Adjust your route like so:
#app.route('myurl/<type_collection>/')
def findAllTheThings():
if not request.form['my_id']: # Just check if a specific entity is chosen
return render_template('YourTemplateHere') # If no entity, then render form
entity_id = request.form['my_id']
get_info_by_id(type_collection, entity_id):
# search into the database and return info about that id
Now adjust the template as follows:
<!-- USER id -->
<form method='GET' action={{url_for('findAllTheThings', type_collection='user')}}>
<input type="text" name="my_id"/><input type="submit" value="Go">
</form>
<!-- COMPANY id-->
<form method='GET' action={{url_for('findAllTheThings', type_collection='company')}}>
<input type="text" name="my_id"/><input type="submit" value="Go">
</form>
Now, if no entity has been selected you'll just render the form. You can throw in a flash to let them know they need to select a specific ID, or just let them figure it out. If an entity has been selected, you will call the fucntion correctly.
I am programming in Spring and using Thymeleaf as my view, and am trying to create a form where users can update their profile. I have a profile page which lists the user's information (first name, last name, address, etc), and there is a link which says "edit profile". When that link is clicked it takes them to a form where they can edit their profile. The form consists of text fields that they can input, just like your standard registration form.
Everything works fine, but my question is, when that link is clicked, how do I add the user's information to the input fields so that it is already present, and that they only modify what they want to change instead of having to re-enter all the fields.
This should behave just like a standard "edit profile" page.
Here is a segment of my edit_profile.html page:
First Name:
Here is the view controller method that returns edit_profile.html page:
#RequestMapping(value = "/edit", method = RequestMethod.GET)
public String getEditProfilePage(Model model) {
model.addAttribute("currentUser", currentUser);
System.out.println("current user firstname: " + currentUser.getFirstname());
model.addAttribute("user", new User());
return "edit_profile";
}
currentUser.getFirstname() prints out the expected value, but I'm getting blank input values in the form.
Thanks.
Solved the problem by removing th:field altogether and instead using th:value to store the default value, and html name and id for the model's field. So name and id is acting like th:field.
I'm slightly confused, you're adding currentUser and a new'd user object to the model map.
But, if currentUser is the target object, you'd just do:
<input type="text" name="firstname" value="James" th:value="${currentUser.firstname}" />
From the documentation:
http://www.thymeleaf.org/doc/tutorials/2.1/usingthymeleaf.html
I did not have a form with input elements but only a button that should call a specific Spring Controller method and submit an ID of an animal in a list (so I had a list of anmials already showing on my page). I struggled some time to figure out how to submit this id in the form. Here is my solution:
So I started having a form with just one input field (that I would change to a hidden field in the end). In this case of course the id would be empty after submitting the form.
<form action="#" th:action="#{/greeting}" th:object="${animal}" method="post">
<p>Id: <input type="text" th:field="*{id}" /></p>
<p><input type="submit" value="Submit" /> </p>
</form>
The following did not throw an error but neither did it submit the animalIAlreadyShownOnPage's ID.
<form action="#" th:action="#{/greeting}" th:object="${animal}" method="post">
<p>Id: <input type="text" th:value="${animalIAlreadyShownOnPage.id}" /></p>
<p><input type="submit" value="Submit" /> </p>
</form>
In another post user's recommended the "th:attr" attribute, but it didn't work either.
This finally worked - I simply added the name element ("id" is a String attribute in the Animal POJO).
<form action="#" th:action="#{/greeting}" th:object="${animal}" method="post">
<p>Id: <input type="text" th:value="${animalIAlreadyShownOnPage.id}" name="id" /></p>
<p><input type="submit" value="Submit" /> </p>
</form>
i am working on a search function, herefore i need the value of an input to generate the final url (which shows the results)
Let's say the user enters the content he is looking for here:
Name: <input type="text" id="myText">
now i need to generate a hyperlink from
http://constant/constant?query=NAME&someotherconstantthings
here, the NAME needs to be replaced from the content of the input
Try to use PHP, you could add a action to the Form Element to post the entered informations to the PHP file, then generate ur hyperlink.
<form action="phpfilename.php" method="post">
Name: <input type="text" id="myText" name="myText">
<input type="submit" value="Search">
</form>
<?php
$name = $_POST['myText'];
$hyperlink = 'http://constant/constant?query='.$name;
?>
You need something like this:
<form action="URL" method="get">
Enter your name here: <input type="text" name="query" value="">
<input type="submit" value="Search">
</form>
You need to replace the keyword URL with the path to the page which performs the search. You can remove the keyword URL if want to submit the form to the same page.
I am using an eCommerce engine script that uses a different search method.
Instead of a URL using GET like this:
http://search.com/searchc?q=the+query
It uses
http://search.com/searchc/the+query
How can I make a form to POST or GET to that, because this form makes the URL
http://search.com/searchc/?q=the+query
<form action="/searchc/" method="post">
<input type="text" id="q" name="q">
<input type="submit" value="go">
</form>
Also tried this (get or post do not work for both of these)
<form action="/searchc/" method="post">
<input type="text" id="" name="">
<input type="submit" value="go">
</form>
The reliable way has two components: Client-side JavaScript manipulation, which turns form submission to a request as needed, and (as backup for non-JS situations) a simple server-side redirect utility which receives a request from the form and redirects it as modified.
Something like this (for the GET case):
<form action="http://www.example.com/redirect"
onsubmit="location.href = document.getElementById('f1').value +
document.getElementById('q').value; return false">
<input type="text" id="q" name="f2">
<input type="submit" value="go">
<input type=hidden id=f1 name=f1 value="http://search.com/search/">
</form>
Here http://www.example.com/redirect is some server-side form handler that just reads the form fields and picks up fields named f1, f2,..., concatenates them into a single string, and redirects using it as a URL. As a CGI script, this would be
use CGI qw(:standard);
$dest = '';
$i = 1;
while(param('f'.$i)) {
$dest .= param('f'.$i++); }
print "Location: $dest\n\n";
<form action="/searchc/" method="post" onsubmit="this.action+=this.q.value;return true">
<input type="text" id="q">
<input type="submit" value="go">
</form>
spaces will be submited as %20
you can use
this.action+=this.q.value.split(' ').join('+')
to replace them
This is very strange url pattern, but anyway you could do something like:
$(function () {
$('form').submit(function () {
var url = '/searchc/' + encodeURIComponent($(this).find('[name=q]').val());
window.location = url;
return false;
});
});