i seem to have reached a impass with my code, im trying to make a java server that maintains my website. My problem is getting data from my java to my website.
this is my ajax im suing to to send stuff to my java, i sends, but i dont know how to send data to my success
function doAjax()
{
// var valstring = JSON.stringify(values);
// var user = {json:valstring};
var data=$("#with").val()+":"+$("#date").val()+":"+$("#where").val();
$.ajax({
type: "GET",
data: data,
url: "http://localhost:55556",
cache: false,
success: function(result)
{
alert("sent");
alert(result.toString());
},
failure: function()
{
alert('An Error has occured, please try again.');
}
});
}
});
my java server on the other hand looks like so
while(//connection)
{
clientSocket = AcceptConnection();
inp = new BufferedReader(new InputStreamReader (clientSocket.getInputStream()));
//using inp to get data
//other tedious code
}
but now if i use .getOutputStream() it doesn't do anything, any of u guys have a solution?
I would honestly appreciate suggestions or any knowledge on how to get that success *function* to work or even an alternative. just keep in mind that this website is already built, not outputted via socket
A simple socket server doesn't understand the HTTP protocol. Shouldn't this be obvious? Either install a Java webserver, like Tomcat, or find a HTTP Server library to use to build your own. My suggestion would be to install Tomcat (or another servlet container), and learn how to use JSP and Servlets. Writing your own webserver will be a total waste of time unless you are doing it to put on an embedded device, which I doubt you are. And even then, it would make more sense to find a solution that already exists. Building a webserver is very involved, and you will unquestionably introduce bugs into it.
Related
I am working on an app that will help me log in the website and view data that I need. While I have no trouble with making sure that I parse that data and work with it properly, I did face an issue with logging into the website. I tried sending POST request, yet that didn't really work for some reason so I started looking more closely into how POST request to that website is sent in the browser and here is what I got:
Picture
I also asked a guy who developed that website and he said that I should use two cookies with "ulogin" and "upassword" for my log in. I tried using JSOUP as shown right here: https://jsoup.org/cookbook/input/load-document-from-url
I used .cookies("upassword", "10101010"), yet it didn't work so it makes me think that there is a bit more to it than just writing a simple line a post request.
Please, can someone explain to me how do I use cookies to log into website or at least point me in the direction where I can learn that, because I am so close to making that app happen and I will be able to proceed further with it's development, but it's just this one step that I am really being stuck with.
Here is an additional picture with Response and Request Headers from the Firefox. Picture
I managed to get it working a long time, yet didn't post an answer. So, here we go.
Cookies are just simple Headers, therefore you should treat them as such. In my case, with the use of HttpURLConnection, here is a piece of working code:
Note: My original request is for Java, however, I have since moved to Kotlin, so this solution uses Kotlin and this function is a "suspend" function which means that it is designed to be used with Kotlin Couroutines.
suspend fun httpRequest(): String {
val conn: HttpURLConnection = url_profile.openConnection() as HttpURLConnection
conn.requestMethod = "POST"
conn.doOutput = true
conn.doInput = true
conn.setRequestProperty(
"Cookie",
"YOUR COOKIE DATA"
)
val input: BufferedReader = BufferedReader(InputStreamReader(conn.inputStream))
return input.readText()
}
I am not sure if this question gonna be considered as duplicated or not, but I wasn't able to find my answer even by googling or through out the QA suggested topics on the SOF. So here I go asking my question:
I have developed a website with Javascript, PHP , AJAX that's using JSON to talk to eachother. And now the client is asking me to change all PHP backend to Spring Boot. That means I gonna talk to the HTML and Javascript and MySql using Java EE Spring Boot and I am not sure how I gonna do it. My main problems are:
1- Is it possible to parse data from Java to the jQuery using JSON ? I mean I retrive data from the MySql and then send it back to the .php file.
The PHP example would be:
$myJSON = json_encode($myObj);
echo $myJSON;
2- Is it possible to get the parsed the respons from the JAVA through the jQuery :
jQuery.ajax({
type:"post",
dataType:"json",
url: myAjax.ajaxurl,
data: {action: 'submit_data', info: info},
success: function(getParsedVAL) {
// the variable getParsedVAL is comming from the JAVA file
successmessage = 'Data was succesfully captured';
$("label#successmessage").text(successmessage);
},
error: function(getParsedVAL) {
// the variable getParsedVAL is comming from the JAVA file
successmessage = 'Error';
$("label#successmessage").text(successmessage);
},
});
success: function(getParsedVAL) {
// the variable getParsedVAL is comming from the JAVA file
successmessage = 'Data was succesfully captured';
}
I’m actually transitioning to spring boot from php. Spring boot actually encodes the java object to json automatically. If you developed the back end with some lightweight framework with routing and model controller structure you can easily convert it to spring boost
I am building a cordova application using the cordova-plugin-passbook plugin, which can be seen here: https://github.com/passslot/cordova-plugin-passbook.
I am trying to consume a pkpass from our java server that is returning the file as expected if we directly hit our service from a browser, but the problem is that we need to use an auth token and go through our oAuth server first. So I must request the pass via ajax in my front end using Angular.
The data I get back is an octet-stream and somehow I need to parse it and get it to work with the plugin above. The plugin is configured to look for a url ending in ".pkpass", I am wondering if it can be configured to look for the parsed data instead of a url.
Can anyone see in the src of the plugin if there is a possible way to do that? I am not very familiar with objective c, but just trying to think of options.
Thanks
Using cordova fileTransfer plugin, I got this working:
fileTransfer.download(
uri,
fileURL,
function(entry) {
Passbook.downloadPass(fileURL);
},
function(error) {
alert('Error retrieving pass, please try again in a little while.');
},
true,
{
headers: {
"Authorization": "Bearer " + LS.get( 'user_token' )
}
}
);
I'm building a Django App with allauth.
I have a page, with authentication required, where I put a Java applet. This applet do GET requests to other pages (of the same django project) which return Json objects.
The applet gets the CSRF token from the parent web page, using JSObject.
The problem is that I want to set ALL the pages with authentication control, but I cannot get the sessionid cookie from the parent web page of the applet, so it cannot do GET (and neither POST) to obtain (or save) data.
Maybe it is a simple way to obtain this, but I'm a newby, and I haven't found anything.
Ask freely if you need something.
Thank you.
EDIT:
Has I wrote downstairs, I found out that the sessionid cookie is marked as HTTPOnly, so the problem now is which is the most safe way to allow the applet to do POST and GET request.
For example it is possible to create a JS method in the page, which GET the data and pass it down to the applet?
Maybe in the same way I can do the POST?
EDIT:
I successfully get the data, using a jquery call from the page. The problem now is that the code throws an InvocationTargetException. I found out the position of the problem, but I don't know how to solve it.
Here is the Jquery code:
function getFloor() {
$.get(
"{% url ... %}",
function(data) {
var output = JSON.stringify(data);
document.mapGenerator.setFloor(output)
}
);}
And here there are the two functions of the applet.
The ** part is the origin of the problem.
public void setFloor(String input) {
Floor[] f = Floor.parse(input);
}
public static Floor[] parse(String input) {
**Gson gson = new Gson();**
Floor[] floors = gson.fromJson(input, Floor[].class);
return floors;
}
And HERE is the log that come out on my server, where you can see that the applet try to load the Gson's library from the server (instead from the applet)
"GET /buildings/generate/com/google/gson/Gson.class HTTP/1.1" 404 4126
Somebady can help me?
You can do something like this in your applet:
String cookies = JSObject.getWindow(this).eval("document.cookie").toString();
This will give you all the cookies for that page delimited by semicolons.
I have a process that I need to follow, I hope this makes sense.
I have a JSP that builds up json data, and sends to a URL. This URL exists, and therefore will be successful.
However, a java based server socket class is listening on a port, and actually picks up the data being sent and processes it. It needs to generate a response for me to receive (ie success or failure codes of what it is going), that I am looking to pick up in the sucess function - but this java socket listener code does not intend on writing this to a JSP or something similar.
Any ideas how the java listener and my success function can meet so I can get the this response.
In my test, I was making the listener code place the response on a JSP and I pick that but, I want a way to not have to place onto a JSP. Is it a case the response (which will be a JSON data) HAS TO actually be served/held within a JSP/PHP/JSON file?
This is my send code below:
$.ajax({
type: "POST",
url: suppliedURL,
data: "jsonData=" + jsonString, // I have already done a json stringify on this.
success: function(data, textStatus, jqXHR) {
var jsonJqXHR = JSON.stringify(jqXHR);
alert('jsonJqXHR : ' + jsonJqXHR);
},
error:function (xhr, ajaxOptions, thrownError){
alert('Error xhr : ' + xhr.status);
alert('Error thrown error: ' + thrownError);
},
dataType: "json"
});
Javascript running in a browser page has limited communication and interconnection capabilities. One of the things a javascript program running in virtually any browser can do is send out an HTTP request. So the obvious way to get data into a javascript program is via XMLHttpRequest, via the pattern some people call AJAX. This pattern is implemented in the jQuery ajax function.
The Javascript program needs to connect to an HTTP server - that is where the JSP comes in. It is a Java program that can respond to HTTP GET/POST etc. JSP or a similar HTTP-connected programming environment on the server, is necessary to serve data to the javascript program.
The only challenge therefore is moving the data from the Java socket program running on the server to the JSP also running on the server. One simple way to handle it is via a shared database or filesystem.