I have some Android applications that have not been touched in years. All of the sudden today they all stopped working. They all read data from a txt file that sits on an https:// site.
If I change the https:// call to http:// everything works fine again. I need the https:// for security. Can anyone tell me what happened?
Keep in mind that this application is a few years old. Did something change in an online library or something to break the https:// calls?
Here is the code. params[0] hold the website address. I have verified the address is correct. Just changing it to http:// fixes everything. II also know it is not the ssl certificate since I have verified it is all working.
It fails on the httpClient.execute command:
protected List<String> doInBackground(String... params) {
HttpClient httpClient = new DefaultHttpClient();
HttpGet httppost = new HttpGet(params[0]);
HttpResponse response;
List<String> data = new ArrayList<String>();
try {
response = httpClient.execute(httppost);
HttpEntity ht = response.getEntity();
BufferedHttpEntity buf = new BufferedHttpEntity(ht);
InputStream is = buf.getContent();
BufferedReader r = new BufferedReader(new InputStreamReader(is));
String line;
while ((line = r.readLine()) != null) {
data.add(line);
}
return data;
}
catch (ClientProtocolException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return null;
}
I don't have any logcat or console output that specifies what the error actually is. I could not find anything.
Thanks for any help.
Related
Previously,I used HttpClient for a http post request and it was working fine, until I believe the server team made some changes. Then I kept getting
javax.net.ssl.SSLPeerUnverifiedException: No peer certificate Exception.
Then, after alot of scratching my head, I tried HttpUrlConnection and it works fine, but still I can't figure out why I got that exception while using HttpClient.
Before code was :
public String postDataAndGetStringResponse( List<NameValuePair> nameValuePairs ) {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost( link );
try {
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = client.execute(post);
InputStream is = response.getEntity().getContent();
String result = "";
if (is != null) {
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
String l = "";
while ((l = reader.readLine()) != null) {
result += l;
}
reader.close();
}
is.close();
return result;
} catch (Exception e) {
Logger.printStackTrace(e);
return ServerUnrechable;
}
}
I did check the server using https://www.sslshopper.com and everything is ticked, it would be very helpful if anybody could tell me the cause to this issue.
One of the most likely causes is that the server you're trying to use now relies on Server Name Indication.
SNI support was added a to HttpsURLConnection in Android, but not to the Apache HTTP Client bundled (now deprecated/removed). See this related question for details.
Some quick background. We have multiple devices running a scanner app which checks against a database to see whether an id has been scanned in or not. I can scan in with Device A as many times as I like without issue. I then pick up Device B and scan in, also as many or few times as I like. If I pick Device A back up and scan, the HttpClient will hang for approximately 60 seconds refusing to send any further requests. The code below has commented the point of failure.
// Asynchronous get request
private class aGETRequest extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... urls) {
String response = "";
for (String url : urls) {
DefaultHttpClient client = new DefaultHttpClient();
client.setKeepAliveStrategy(null);
HttpGet httpGet = new HttpGet(url);
try {
HttpResponse httpResponse = client.execute(httpGet); //Hangs Here
HttpEntity httpEntity = httpResponse.getEntity();
InputStreamReader isr = new InputStreamReader(httpEntity.getContent());
BufferedReader buffer = new BufferedReader(isr);
String s = "";
while ((s = buffer.readLine()) != null) {
response += s;
}
httpEntity.consumeContent();
isr.close();
} catch (Exception e) {
e.printStackTrace();
}
httpGet.abort();
client.getConnectionManager().shutdown();
}
return response;
}
#Override
protected void onPostExecute(String result) {
results(result);
}
}
The client hangs and even snooping traffic shows no requests sent at all from Device A after the failure. You ready for the best part? If the devices are going through a Proxy server, it works. W.T.F?
Android is java 6 compat . right.
BufferedReader on java 7 makes me nervous and the while read loop appears to be whats hanging.....
I would try a different different read loop class thats solid on java 6 or i would find someone else's pattern for httpclient that's solid.
My wild guess is that your code is never getting out of the following...
while ((s = buffer.readLine()) != null)
Maybe the server is returing chunked encoding or something like that with a diff protocol ( pattern of length=0 followed by \r\n or something.
I'm coding a login system which will keep the user permanently logged on (until username or password is incorrect) but I'm having an issue with cookie storage. What I want to do is have the cookies store in local storage (probably shared preference). Though I have no idea where to start. This is my main HTTP Post function.
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
try {
// Add your data
httppost.setHeader("X-Requested-With", "XMLHttpRequest");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
StringBuffer sb = new StringBuffer();
BufferedReader rd = new BufferedReader(new InputStreamReader(entity.getContent()));
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
return sb.toString();
} catch (Exception e) {
//TODO: WIP
e.printStackTrace();
}
I want to set the cookies first (of course if there are any) then I would like to resave them after the httppost has executed. Where can I go about doing this?
Edit there is about 4 cookies that are saved.
This should help you get started:
http://docs.oracle.com/javase/tutorial/networking/cookies/definition.html
Check out this post as well:
https://stackoverflow.com/a/3587332/2495131
I wish to settle my long term problem by this question and hope you guys would help, but firstly; I have been having issues to connect to a HTTPS self-signed certificate server for almost 3 weeks. Despite the multiple solutions here, I cannot seem to resolve my problem. Probably I did not know how to use it properly or did not have some files or imported the correct libraries.
I came across some websites that requires me to download a certificate from the https site that I am trying to connect into, and when I did that. I have to do the some steps before I can use the certificate or keystore that I created. I got this solution from this website:
Android: Trusting SSL certificates
// Instantiate the custom HttpClient
DefaultHttpClient client = new MyHttpClient(getApplicationContext());
HttpGet get = new HttpGet("https://www.mydomain.ch/rest/contacts/23");
// Execute the GET call and obtain the response
HttpResponse getResponse = client.execute(get);
HttpEntity responseEntity = getResponse.getEntity();
I have a problem, after the last line, as stated above. What do I do with the responseEntity? How do I use it if I wish to display the https website on a WebView? Some help and explanation would be nice :)
If you want the content from the HttpEntity the correct way does not include calling HttpEntity#getContent() to retrieve a stream and doing tons of pointless stuff already available in the Android SDK.
Try this instead.
// Execute the GET call and obtain the response
HttpResponse getResponse = client.execute(get);
HttpEntity responseEntity = getResponse.getEntity();
// Retrieve a String from the response entity
String content = EntityUtils.toString(responseEntity);
// Now content will contain whatever the server responded with and you
// can pass it to your WebView using #loadDataWithBaseURL
Consider using WebView#loadDataWithBaseURL when displaying content - it behaves a lot nicer.
You need to call responseEntity.getContent() to get response in InputStream against your requested URL. Use that stream in your way to present data as you want. For example, if the expected data is String, so you may simply convert this stream into string with the following method:
/**
* Converts InputStream to String and closes the stream afterwards
* #param is Stream which needs to be converted to string
* #return String value out form stream or NULL if stream is null or invalid.
* Finally the stream is closed too.
*/
public static String streamToString(InputStream is) {
try {
StringBuilder sb = new StringBuilder();
BufferedReader tmp = new BufferedReader(new InputStreamReader(is),65728);
String line = null;
while ((line = tmp.readLine()) != null) {
sb.append(line);
}
//close stream
is.close();
return sb.toString();
}
catch (IOException e) { e.printStackTrace(); }
catch (Exception e) { e.printStackTrace(); }
return null;
}
InputStream is = responseEntity.getContent();
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line="0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
String result=sb.toString();
is.close();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
you will have all the content in the String "result"
I'm a novice with Java and Android, but not to programming and HTTP. This HTTP GET method, mostly copied from other examples using the Apache HTTP classes, only retrieves the first few K of a large webpage. I checked that the webpage does not have lines longer than 8192 bytes (is that possible?), but out of webpages around 40K I get back maybe 6K, maybe 20K. The number of bytes read does not seem to have a simple realtionship with the total webpage size, or the webpage modulus 8192, or with the webpage content.
Any ideas folks?
Thanks!
public static String myHttpGet(String url) throws Exception {
BufferedReader in = null;
try {
HttpClient client = getHttpClient();
HttpGet request = new HttpGet();
request.setURI(new URI(url));
HttpResponse response = client.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sbuffer = new StringBuffer("");
String line = "";
while ((line = in.readLine()) != null) {
sbuffer.append(line + "\n");
}
in.close();
String result = sbuffer.toString();
return result;
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
No need to write you own HttpEntity-to-String code, try EntityUtils instead:
// this uses the charset the server encoded the entity in
String result = EntityUtils.toString(entity);
It looks as if the problem is with pages from a certain website starting Goo... I'm not having this problem with large pages from other sites. So the code is probably OK.