URLConnection is a class that enables Java code to access data available from various urls.
Questions tagged [urlconnection]
674 questions
5
votes
3 answers
Read from a BufferedReader more than once in Java
I have the following piece of code in Java:
HttpURLConnection con = (HttpURLConnection)new URL(url).openConnection();
con.connect();
InputStream stream = con.getInputStream();
BufferedReader file = new BufferedReader(new…
barak manos
- 29,648
- 10
- 62
- 114
5
votes
1 answer
why does the call to java.net.URLConnection.getHeaderField(0) result in a StackOverflowError?
For some reason, when the code makes a request using an HTTP proxy, the call to "getHeaderField(0)", which I understand is supposed to return a String that represents the server's response code, results in a StackOverflowError.
There are no…
J Smith
- 2,375
- 3
- 18
- 36
5
votes
1 answer
Android: URLConnection.getContentLength() giving incorrect value
I'm trying to get the size of the contents of a URL using:
URLConnection conn = null;
URL url = null;
url = new URL("https://dl.dropboxusercontent.com/u/90210205/Default.html");
conn = url.openConnection();
conn.connect();
InputStream in = new…
Eduardo
- 6,900
- 17
- 77
- 121
5
votes
3 answers
Custom JavaFX WebView Protocol Handler
I am trying to write my own protocol handler for a JavaFX application that uses webview to access a single website. What I have done so far
My custom URLStreamHandlerFactory
public class MyURLStreamHandlerFactory implements URLStreamHandlerFactory…
bluchip.gr
- 349
- 1
- 6
- 16
5
votes
4 answers
Creating an object of abstract class URLConnection or HttpURLConnection in Java
I saw the following code in a tutorial:
URLConnection connection = new URL("http://example.com").openConnection();
How is that possible? The API says that URLConnection (and also the Subclass HttpURLConnection) is an abstract class. But abstract…
Michael Langhammer
- 710
- 8
- 18
5
votes
1 answer
Why does HttpURLConnection.getResponseCode() throws IOException?
I can see that getResponseCode() method is just a getter Method that returns the statusCode already set by the a connect action that happened before.
So in this context why does it throw an IOException?
Am i missing something?
vivek_jonam
- 3,237
- 8
- 32
- 44
4
votes
1 answer
dfference between using URLCOnnection Object and Httppost in android client
I am using URLConnection Object to send data from my android client to server.
URL url = new URL("http://10.0.2.2:8080/hello");
URLConnection connection = url.openConnection();
connection.setDoOutput(true);
ObjectOutputStream out=new…
Ashwin
- 12,691
- 31
- 118
- 190
4
votes
1 answer
How to parse an application/json object into a String
I am programmatically navigating to a site that returns application/json format. I can't seem to read the json returned in the HttpURLConnection. I am using Jackson to demarshall the JSON into the java object. The code is:
InputStreamReader isr =…
jabawaba
- 279
- 1
- 6
- 16
4
votes
1 answer
java.security.AccessControlException: Access denied ("java.net.URLPermission" "https://example.com" "*:*")
I'm trying to use Java to talk to the ibm connections API through urlConnection with the following code
String url = "https://example.com";
URL myUrl = new URL(url);
URLConnection urlCon = myUrl.openConnection();
urlCon.setRequestProperty("Method",…
baier-uniko
- 41
- 3
4
votes
1 answer
ClassCastException to disconnect HttpURLConnection casted from URLConnection with PowerMockito
My connection works fine with:
URLConnectionFactory hadoopConnectionFactory = URLConnectionFactory.newDefaultURLConnectionFactory(cfg);
String url = "...";
URLConnection urc = hadoopConnectionFactory.openConnection(new URL(url));
urc.connect();
//…
Corporativo
- 185
- 1
- 2
- 11
4
votes
2 answers
Download image from link with query parameter in JAVA
I am downloading image from link with the help of this code in java
public static BufferedImage ImageDownloader(String urlString){
BufferedImage image = null;
try {
URL url = new URL(urlString.replace(" ","%20"));
…
yousuf iqbal
- 408
- 2
- 7
- 16
4
votes
1 answer
Proper use of URLConnection and try-with-resources in Java 8
I am not 100% if this code is 100% save against memory leaks or leaving sockets open:
public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
URLConnection connection = new URL(url).openConnection();
…
M. H.
- 171
- 1
- 14
4
votes
0 answers
Android: Download file from password protected website
I need to download some pdf files from a site where users have to login before they can download any files.
If a user is not logged into the site, links to pdf files will redirect to the login page.
I managed to post user credentials to the login…
Vahid
- 1,829
- 1
- 20
- 35
4
votes
1 answer
EXC_BAD_ACCESS upon block execution
I have a class with a single method, that uses a URLConnection to send a serialized NSDictionary to a script at a certain URL, and then calls a completion block. Here is the code for that method:
- (void)sendDictionary:(NSDictionary *)dictionary…
Hersh Bhargava
- 615
- 4
- 19
4
votes
2 answers
java.lang.IllegalArgumentException: TLSv1.2 on JRE 1.5
I am trying to consume TLSv1.2 enabled protocol web services on JRE 1.5 and facing below issue. Looks like TLSv1.2 does not supported by JRE1.5 but at the same time we cannot upgrade our target environment to a latest version of JRE. IS there any…
Jai Kishore
- 77
- 1
- 2
- 7