I am beginner in Java and Android Studio. I have written a code by Android Studio and Wamp as server and Genymotion as simulator. all codes work fine and I can interact with mysql by use of my .php files
Then I decide to transfer codes to real server.
but I get this error:
java.io.FileNotFoundException: http://burj.1shahrvand.com/Burj/BikerLogin.php
The File is available check it here but I get Exception that file not found
The code is like this:
String uri = rp.getUri();
if(rp.getMethod().equals("GET")){
uri += "?" + rp.getEncodedParams();
}
HttpURLConnection connection;
try {
URL url = new URL(uri);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod(rp.getMethod());
if (rp.getMethod().equals("POST")){
connection.setDoOutput(true);
connection.setDoInput(true);
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write(rp.getEncodedParams());
writer.flush();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null) {
sb.append(line);
}
return sb.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
Log.i("HESAM Original", e.getMessage());
e.printStackTrace();
}
return null;
I appreciate your Help!
You will get a FileNotFoundException if you call getInputStream after the server has responded withe a 404 or 410 status code.
If you want to avoid the exception, check that the response status code is a 2xx code. If it isn't then use getErrorStream instead of getInputStream.
In my case, There is an option in my Cpanel. It is MOD Security, Just turn it off, after 15 minutes my app worked properly.
Simply you need to add the port name(:8080) with the localhost ip address in URL String, like i did:
String login_url = "http://192.168.0.136:8080/login.php";
Related
I'm trying to use the open data sets that data.LACity.org publishes using Socrata software.
They have a Java API for it, but first I tried to just build and send a URL, as
a variant on the 'Sunshine' app several people have learned from on Udacity.
Now I'm actually building a URL, and then sending it out, but then I get a FileNotFoundException, as follows:
java.io.FileNotFoundException: http://data.lacity.org/resource/yv23-pmwf.json?$select=zip_code, issue_date, address_start, address_end, street_name, street_suffix, work_description, valuation&$where=issue_date >= '2015-02-27T00:00:00' AND zip_code = 90291
Here's the pisser: That whole URL is, as a final attempt, hardwired as a complete string, not built from pieces. The URL works if I plug it into Chrome, but not from my app.
But from my app, the old URL string that the Sunshine sample app builds, plugged in from logcat from a Sunshine run, to replace the URL on the lacity URL, well, that call works, and returns the JSON data.
So I'm doing something wrong when I call the LACity URL for Socrata data from my Android app. I've tried this both as https and http, and both failed. But the same code works when I call the weathermap data from the sample app.
Here are the two URLs:
http://api.openweathermap.org/data/2.5/forecast/daily?q=94043&mode=json&units=metric&cnt=7 <<< this works, both in Chrome and from Android
https://data.lacity.org/resource/yv23-pmwf.json?$select=zip_code, issue_date, address_start, address_end, street_name, street_suffix, work_description, valuation&$where=issue_date >= '2015-02-27T00:00:00' AND zip_code = 90291
This works in Chrome but not from Android.
Any suggestions would be appreciated. I'm going to try again to make heads or tails of the Socrata Soda2 Java API (and why, in this case, it might be necessary.)
Thanks
-k-
The immediate code fragment (pardon my newness to Android/Java):
final String PERMIT_BASE_URL = "one of the url strings above";
Uri builtUri = Uri.parse(PERMIT_BASE_URL).buildUpon()
.build();
URL url = new URL(builtUri.toString());
Log.v(LOG_TAG, "Build URL: " + url.toString());
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
//simplify debugging
buffer.append(line + "\n");
}
if (buffer.length() == 0) {
return null;
}
permitJsonStr = buffer.toString();
Log.v(LOG_TAG, "Permit JSON string: " + permitJsonStr);
} catch (IOException e) {
Log.e(LOG_TAG, "Error on Xoom", e);
// Nothing to parse.
return null;
} finally{
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e(LOG_TAG, "Error closing stream on Xoom", e);
}
}
Figured this out from the way this page highlighted the URLs in my question.
Spaces.
The call out of Android seems to cough because of the spaces in the URL string.
I closed them all up, but then the 'AND' caused issues.
Replaced it with &, now it works, hardwired.
I'll work on constructing it from input parameters, as intended, but I think this is OK.
As Emily Litella would say...
In my Wikipedia reader app for Android, I'm downloading an article's html by using HttpURLConnection, some users report that they are unable to see articles, instead they see some css, so it seems like their carrier is somehow preprocessing the html before it's downloaded, while other wikipedia readers seem to work fine.
Example url: http://en.m.wikipedia.org/wiki/Black_Moon_(album)
My method:
public static String downloadString(String url) throws Exception
{
StringBuilder downloadedHtml = new StringBuilder();
HttpURLConnection urlConnection = null;
String line = null;
BufferedReader rd = null;
try
{
URL targetUrl = new URL(url);
urlConnection = (HttpURLConnection) targetUrl.openConnection();
if (url.toLowerCase().contains("/special"))
urlConnection.setInstanceFollowRedirects(true);
else
urlConnection.setInstanceFollowRedirects(false);
//read the result from the server
rd = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
while ((line = rd.readLine()) != null)
downloadedHtml.append(line + '\n');
}
catch (Exception e)
{
AppLog.e("An exception occurred while downloading data.\r\n: " + e);
e.printStackTrace();
}
finally
{
if (urlConnection != null)
{
AppLog.i("Disconnecting the http connection");
urlConnection.disconnect();
}
if (rd != null)
rd.close();
}
return downloadedHtml.toString();
}
I'm unable to reproduce this problem, but there must be a way to get around that? I even disabled redirects by setting setInstanceFollowRedirects to 'false' but it didn't help.
Am I missing something?
Example of what the users are reporting:
http://pastebin.com/1E3Hn2yX
carrier is somehow preprocessing the html before it's downloaded
a way to get around that?
Use HTTPS to prevent carriers from rewriting pages. (no citation)
Am I missing something?
not that I can see
I am trying to post XML data to a server which processes this XML and gives a response back, some times the XML data can be very large and the server takes a while to process it, in those cases i fail to get any response back instead i receive a IOException with the message "Unexpected end of file from server". I am positive the XML being sent to the server is not full of errors, is there anything i can do on my end to make sure this doesn't happen or is this a server side issue? Below is code fragment of the method i call to post the data.
Thanks.
String encodedData="some XML"
String urlString="example.com"
try {
URL url = new URL(urlString);
HttpURLConnection urlConnection;
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", contentType);
urlConnection.setRequestProperty("Content-Length", encodedData.length()+"");
OutputStream os = urlConnection.getOutputStream();
os.write(encodedData.getBytes());
BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));
StringBuffer sb = new StringBuffer();
String inputLine;
while ((inputLine = in.readLine()) != null) {
sb.append(inputLine);
}
in.close();
} catch (MalformedURLException e) {
logger.debug("MalformedURLException " + e.getMessage());
logger.debug((new StringBuilder()).append("urlString=").append(urlString).toString());
throw (e);
} catch (IOException e) {
logger.debug("IOException " + e.getMessage());
logger.debug((new StringBuilder()).append("urlString=").append(urlString).toString());
throw (e);
}
return sb.toString();
Not much could be done from the client side, it's just a server side issue in which the server takes very long to process the data which results in the servers connection to timeout before it could send a response.
I've been trying to query NCBI blast website using Android and BioJava. I'm using Eclipse with the Android emulator. When I run the code as an Android app I get the following errors:
W/System.err(533): java.io.IOException: An error occured submiting sequence to BLAST server. Cause: content-length promised 2000 bytes, but received 214
When I take the very same code and run it as a regular Java app it works perfectly. Any ideas on what it might be?
It also occured to me while I was trying to make a POST request in Android . If you set Content-Length in headers and the actual content has a different length, it will throw an IOException in Android (in plain JDK it worked, although it is wrong)
You can reproduce the Exception using the following code:
try {
URL oracle = new URL("http://oasth.gr/tools/lineTimes.php");
HttpURLConnection yc = (HttpURLConnection) oracle.openConnection();
yc.setRequestProperty("User-Agent",
"Mozilla/5.0 (X11; Linux i686; rv:2.0b12) Gecko/20110222 Firefox/4.0b12");
yc.setRequestProperty("Referer",
"http://oasth.gr/tools/lineTimes.php");
yc.setRequestProperty("Accept-Language",
"el-gr,el;q=0.8,en-us;q=0.5,en;q=0.3");
yc.setRequestProperty("Accept-Charset",
"ISO-8859-7,utf-8;q=0.7,*;q=0.7");
// content length should be 29 !!
yc.setRequestProperty("Content-Length", "1000");
// content length is 29 !
String parames = "bline=63&goes=a&lineStops=886";
yc.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(yc.getOutputStream());
wr.write(parames);
wr.flush();
Log.d(TAG, "" + yc.getResponseCode());
BufferedReader in = new BufferedReader(new InputStreamReader(
yc.getInputStream()));
String inputLine;
StringBuilder sbu = new StringBuilder();
while ((inputLine = in.readLine()) != null)
sbu.append(inputLine);
wr.close();
in.close();
} catch (IOException e) {
e.printStackTrace();
Log.e("getLinesArrival Exception", e.getMessage());
}
so if you remove line
yc.setRequestProperty("Content-Length", "1000");
it will work!
I'm having problem with sending XML-data using HTTP POST to an API.
If I send well formatted XML, I get an error message:
Server Exception: Cannot access a closed Stream
If the XML isn't well formatted, I get HTTP 500. And if I just send an empty string instead of a string with XML, I get back an error message: EMPTY REQUEST.
I don't have many ideas about what the error could be, but the connection works because the error message is returned in XML format. I'm just sending the XML data as a string. Is it possible that I am required to send an EOF or something in the end? And how do I do that in my Java code? Any other ideas about what the problem can be?
The API is made in .NET
Here is the Java code I'm using to POST the XML data:
Authenticator.setDefault(new MyAuthenticator());
String xmlRequestStatus =
"<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?><test><data>32</data></test>";
System.out.println(xmlRequestStatus);
String contentType = "text/xml";
String charset = "ISO-8859-1";
String request = null;
URL url = null;
HttpURLConnection connection = null;
OutputStream output = null;
InputStream response = null;
try {
url = new URL("http://127.0.0.1/test");
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
connection = (HttpURLConnection)url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Accept-Charset", charset);
connection.setRequestProperty("Content-Type", contentType);
output = connection.getOutputStream();
output.write(request.getBytes("ISO-8859-1"));
if(output != null) try { output.close(); } catch (IOException e) {}
response = connection.getInputStream();
....
It looks fine and should work fine. The connection.setRequestMethod("POST"); is however entirely superfluous when you already did connection.setDoOutput(true);.
Since this error is coming straight from the .NET webservice hosted at localhost, are you sure that it is written without bugs? I don't do .NET, but Google learns me that it's related to MemoryStream. I'd concentrate on the .NET code and retest/debug it. Maybe those related SO questions may help.
You need to specify method POST by doing something like this,
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Length", "" + length);
Otherwise, it's treated as a GET and some server doesn't expect body with GET so the stream is closed.
Maybe close the OutputStream later in the control flow. So instead of this:
output.write(request.getBytes("ISO-8859-1"));
if(output != null) try { output.close(); } catch (IOException e) {}
response = connection.getInputStream();
Try this (and maybe add the flush)?
output.write(request.getBytes("ISO-8859-1"));
output.flush();
response = connection.getInputStream();
if(output != null) try { output.close(); } catch (IOException e) {}
Shouldn't it be <32 instead of <32?
It looks like request is initialized to null, but afterwards not set. Should it not be
output.write(xmlRequestStatus.getBytes("ISO-8859-1"));