I have this URL, http://www.google.com/ig/calculator?hl=en&q=1USD%3D%3FINR
which returns the current USD->INR conversion rate as text.
the text displayed on the screen is the only text in the HTML source of the page.
I was struggling to get that HTML source as many things I tried returned Exceptions.
for e.g.:
public static String getHtml(String url)
throws ClientProtocolException, IOException
{
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpGet httpGet = new HttpGet(url);
HttpResponse response = httpClient.execute(httpGet, localContext);
String result = "";
BufferedReader reader = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
result = reader.readLine();
return result;
}
returned an exception when called from
try {
String test = getHtml("google.com/ig/calculator?hl=en&q=1USD%3D%3FINR");
Log.d("ASDADS", test);
} catch (Exception e) {
Log.d("ASDASD", "FAILED");
}
Also, I have added the INTERNET permission in Manifest, and my network is also working without fault.
Make your URL something like,
"http://www.google.com/ig/calculator?hl=en&q=1USD%3D%3FINR"
Also the result from it is in JSON not in HTML.. So parse the result like JSON..
Related
I am trying to get a list of user subreddits via the reddit api. Currently I am able to do a post for login which returns a cookie and modhash. Those are the parameters I'm passing to my method below. However each time I call the function I get an empty response:
"{}"
How can I pass a cookie and modhash via HTTPGET to get a valid response?
public void getUserSubreddits(String[] loginInfo){
HttpClient client = new DefaultHttpClient();
URL url = null;
try {
url = new URL("http://www.reddit.com/subreddits/mine/.json?limit=100");
HttpGet httpGet = new HttpGet(String.valueOf(url));
client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, System.getProperty("http.agent"));
httpGet.addHeader("cookie", loginInfo[1]);
httpGet.addHeader("modhash", loginInfo[0]);
HttpResponse response = client.execute(httpGet);
HttpEntity ht = response.getEntity();
BufferedHttpEntity buf = new BufferedHttpEntity(ht);
InputStream is = buf.getContent();
BufferedReader r = new BufferedReader(new InputStreamReader(is));
StringBuilder total = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
total.append(line);
}
Log.d(TAG,total.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
It was a simple mistake. To anyone in the future trying this I solved the problem by using Chrome to inspect the headers of an active session on http://www.reddit.com/subreddits/mine/.json?limit=100 url and found that the cookie header started with:
reddit_session
So I removed the modhash changed the my header parameter to read:
httpGet.addHeader("cookie", "reddit_session="+loginInfo[1]+";");
With this I got a valid response.
I am working on an app that allows the user upload an image by using HttpPost method. I use MultipartEntity and therefore I added the libraries apache-mime4j-0.6.1.jar, httpclient-4.3.1.jar, httpcore-4.3.1.jar and httpmime-4.2.1.jar into my app. My upload code is like below:
public String uploadFile() throws Exception
{
String result = "";
try
{
HttpResponse response = null;
HttpClient httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost(_url);
request.setHeader("Accept", "application/json");
File file=new File(filePath);
String fileName=file.getName();
MultipartEntity imageEntity=new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE,null,Charset.forName("UTF-8"));
imageEntity.addPart("imageName", new StringBody(fileName));
imageEntity.addPart("image", new FileBody(file, "application/octet-stream"));
request.setEntity(imageEntity);
response = httpClient.execute(request);
InputStream dataStream = response.getEntity().getContent();
BufferedReader dataReader = new BufferedReader(new InputStreamReader(dataStream));
String line = "";
while ((line = dataReader.readLine()) != null)
result+=line;
}
catch (Exception e)
{
}
return result;
}
I get response from my server but in my web service code Request.Files has no file. If I change the line:
MultipartEntity imageEntity=new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE,null,Charset.forName("UTF-8"));
to
MultipartEntity imageEntity=new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
app is in process for a long time (about 3-4 minutes) and throws error. This is caused if I add an image. If I send only StringBody without FileBody, I get response from server and Request.Files in my webservice code return file count correctly. How can I fix this problem and upload image correctly? Any suggestion?
I just started the topic to get data from a JSON OpenData and visualize via my phone.
I followed this tutorial and it has worked all :)
https://www.learn2crack.com/2013/10/android-asynctask-json-parsing-example.html
The url whew i get the datas is :
http:// + api.learn2crack.com/android/json/ (sorry for that, I don't have a good reputation :) )
Then I wanted to try a Opendata me and my android application stops, the url is:
http://ckan.opendata.nets.upf.edu/storage/f/2013-11-30T16%3A49%3A59.118Z/london.json
You can see it's the same and I only change the name of URL in the code.
You know if the problem is because of the OpenData? and I need some permission? Because when I execute the second part my app stopped
Here, this will work. I am using Strict Policy but normally you should use Async. Please google this as to why we should use Async instead of Strict Policy. This is irrelevant here
When i am using HttpPost to get your json from url, i am getting these errors :-
405 Method Not Allowed
The method POST is not allowed for this resource.
You cannot POST a file
so i am using HttpGet :-
String url = "http://ckan.opendata.nets.upf.edu/storage/f/2013-11-30T16:49:59.118Z/london.json";
try{
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
//HttpPost httpPost = new HttpPost(url);
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
JSONObject jObj = new JSONObject(sb.toString());
JSONArray json2 = json.getJSONArray("user");
for (int i = 0; i < json2.length(); i++) {
JSONObject c = json2.getJSONObject(i);
}
}
catch (Exception e) {
e.printStackTrace();
}
My requirement is i want to save some data in database by using web-services. it's working fine up to without spaces between the words.
my problem starts from here if entered text (getting text from EditText) having spaces i am getting this error.
Illegal character in path at index 103:
these are the strings from edittext : news as, news db.
this is the code
try {
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost postRequest = new HttpPost("mwweb" +channel_token+"/" +data_src_id+
"/"+ title+"/"+details);
HttpResponse response = httpClient.execute(postRequest, localContext);
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
String sResponse = reader.readLine();
System.out.println(" response" +sResponse);
} catch (Exception e) {
Log.e(e.getClass().getName(), e.getMessage());
}
EDIT: i got half of the solution from Android, weakwire suggetions , if i use this replaceAll(" ", "%20") working if text have only spaces. if i use encoding working if text have special charecters, did't get for spaces . i want the solution for both(means text having spaces and special charecters).
Url is not encoded. Also URLEncoder.encode will not help you unless you apply it to each argument seperatly. You can try this
String url="myurl" +channel_token+"/" data_src_id+"/"+ title+"/"+details);
url=url.replace(" ","%20");
HttpPost postRequest = new HttpPost(url);
or
channel_token=URLEncoder.encode(channel_token, "UTF-8");
data_src_id=URLEncoder.encode(data_src_id, "UTF-8");
... etc for all the arguments
I Use BufferedInputStream For HTTP POST/GET
But I Get Some Error the Below
java.io.FileNotFoundException: http://XX.XX.XX.XX/WebWS/data.aspx
Transport endpoint is not connected
Why Get This Error. My Code is Below
URL url = new URL(glob.postUrl);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
try {
httpConn.setDoInput(true);
httpConn.setDoOutput(true);
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
httpConn.setRequestProperty("Content-Language", "TR");
httpConn.setConnectTimeout(12000);
Iterator<String> reqProps = hMap.keySet().iterator();
while (reqProps.hasNext()) {
String key = reqProps.next();
String value = hMap.get(key);
httpConn.addRequestProperty(key, value);
}
InputStream in = new BufferedInputStream(httpConn.getInputStream());
StringBuilder builder = new StringBuilder();
String line;
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(in, "UTF-8"));
while ((line = reader.readLine()) != null) {
builder.append(line);
}
} finally {
in.close();
}
httpConn.disconnect();
Thanks.
Is there any reason you're not using HttpClient?
You can replace your code with something like:
HttpContext httpContext = new BasicHttpContext();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
HttpResponse response = httpClient.execute(httpGet, httpContext);
int statusCode = response.getStatusLine().getStatusCode();
HttpEntity entity = response.getEntity();
String page = EntityUtils.toString(entity);
You can setup the HttpClient with ClientConnectionManager and HttpParams for security and various http parameters for the client at initialisation (plenty of examples around if you search on class names).
HttpURLConnectionImpl.getInputStream() is known to throw a FileNotFoundException if the HTTP response status code is 400 or higher, i.e. for any error condition on the server side. You should check what the status code really is in order to obtain suitable debug information.
However, I second Mark Fisher's suggestion about using HttpClient, which AFAIK is the preferred way of working with HTTP on Android.