As I'm progressing through my Android learning in some spare time, I've encountered a strange behaviour of HttpPost request.
What I'm trying to achieve:
Make a simple POST request from Android application to Apache web-server running on my development PC and display the POSTed data from PHP script to which the form is sent.
My Android app's Java code resides inside an Activity as an AsyncTask as following:
private class DoSampleHttpPostRequest extends AsyncTask<Void, Void, CharSequence> {
#Override
protected CharSequence doInBackground(Void... params) {
BufferedReader in = null;
String baseUrl = "http://10.0.2.2:8080/android";
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost(baseUrl);
List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("login", "someuser"));
postParameters.add(new BasicNameValuePair("data", "somedata"));
UrlEncodedFormEntity form = new UrlEncodedFormEntity(postParameters);
request.setEntity(form);
Log.v("log", "making POST request to: " + baseUrl);
HttpResponse response = httpClient.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
return sb.toString();
} catch (Exception e) {
return "Exception happened: " + e.getMessage();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
#Override
protected void onPostExecute(CharSequence result) {
// this refers to a TextView defined as a private field in the parent Activity
textView.setText(result);
}
}
My PHP code is the following:
<?php
echo "Hello<br />";
var_dump($_SERVER);
if ($_SERVER["REQUEST_METHOD"] == "POST") {
echo "Page was posted:<br />";
foreach($_POST as $key=>$var) {
echo "[$key] => $var<br />";
}
}
?>
And finally the problem:
As you can see, the $_SERVER contents is dumped, and in the output $_SERVER["REQUEST_METHOD"] has value GET despite the fact that I was actually making a POST request. Even if I try to dump the contents of $_POST, it's empty.
What am I doing wrong? Thanks in advance.
You might need to specify a trailing slash at the end of the URL.
Often Apache redirects requests that don't end in trailing slashes so that they do contain a trailing slash. That redirect is a GET redirect (without some tweaking), so all POST data is lost.
Related
Please I have gone through all the question from stackoverflow, but those are not applicable to my problem.
Please have look in image request working fine from POSTMAN.
But When I tried from android code it is not working.
My Sample Android code is here.
#Override
protected String doInBackground(Void... params) {
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
// Will contain the raw JSON response as a string.
String forecastJsonStr = null;
try {
URL url = new URL("sample url");
String postData = "key1=valu1&key2=valu2";
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(55000 /* milliseconds */);
conn.setConnectTimeout(55000 /* milliseconds */);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(os));
writer.write(postData);
writer.flush();
writer.close();
os.close();
int responseCode=conn.getResponseCode();
if (responseCode == HttpsURLConnection.HTTP_OK) {
BufferedReader in=new BufferedReader(
new InputStreamReader(
conn.getInputStream()));
StringBuffer sb = new StringBuffer("");
String line="";
while((line = in.readLine()) != null) {
Log.e("response ",line);
sb.append(line);
break;
}
in.close();
return sb.toString();
}
else {
return new String("false : "+responseCode);
}
} catch (Exception e) {
Log.e("PlaceholderFragment", "Error ", e);
// If the code didn't successfully get the weather data, there's no point in attemping
// to parse it.
return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
}
}
}
}
Above java code return 405 error code. I also tried from OkHttp also.
Please help.
Putting a '/' at the end of URL causes the redirect to happen because your server likes urls that end in '/'. POST is fully supported by the URL your server redirects you to, but the client is executing a GET request when it behaves according to your setRedirecting() call (cURL does the same exact thing with the -L switch) The fix is to either put a '/' at the end of URL, or to grab the Location header from the response yourself and then initiate another POST request manually.
This can be observed in wireshark. You can test the theory by trying to perform a GET request with your browser to the URL with a slash appended to it. That will cause the browser to get a 405. Here's the fixed code for Android, this code uses the simple fix of appending a '/' to the URL (not production ready):
Read more from here.
Do let me know if this helps :)
Additionally, try using this piece of code:
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("https://your URL");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("stringdata", "Hi"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
Your API call is reciveving data in GET parameter. So data should send along with url as given below
String postData = Uri.encode("key1=valu1&key2=valu2");
URL url = new URL("sample url"+"?+postData);
I just had a similar problem with the HttpClient in Java. The solution was to specify the HTTP version explicitly:
HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_1_1)
.build();
Now my requests returns the same result as through Postman.
i have written an android app which post data to my database. The app should access an webservice which post the data to the database. the webservice works fine. ive testet it with my browser, he is already on the server. now i want my app to execute the webservice. but that doesnt work. My debugger doesnt work too so im not able to debug. here is my code to for accessing the webservice. any ideas??
public class PostBlog extends AsyncTask<String, Void, String> {
String BlogURL;
public PostBlog(String insertBlogURL) {
BlogURL = insertBlogURL;
}
#Override
protected String doInBackground(String... params) {
postBlogData(BlogURL);
return null;
}
public void postBlogData(String url) {
String result = "";
//the year data to send
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("year", "1980"));
//http post
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.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();
result = sb.toString();
} catch (Exception e) {
//(TextView)rootView.findViewById(R.id.question)
Log.e("log_tag", "Error converting result " + e.toString());
}
}
}
The Class is called from my main Activity by
new PostBlog(insertBlogURL).execute("");
Is there another easier way to execute my ".jsp?asdd=sdsd" file on the server?
Thanks for your ideas.
Instead of doing :
new PostBlog(insertBlogURL).execute("");
Change your constructor and retrieve the url from the doInBackground method, by doing params[0]
Then initiate the download like this
PostBlog blogPoster = new PostBlog();
try {
blogPoster.execute(insertBlogURL);
} catch (InterruptedException e) {} catch (ExecutionException e) {}
I should say this is a modified snippet of code from my own project, so it might not work exactly the way you expect.
This is for an Android application ,where my mobile developer is trying to post json data to my PHP page .
Below is the function that is being used :
public static String postData(String url, String postData) {
// Create a new HttpClient and Post Header
InputStream is = null;
StringBuilder sb = null;
String result = "";
// StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
// StrictMode.setThreadPolicy(policy);
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
try {
httppost.setEntity(new StringEntity(postData));
httppost.setHeader("Accept", "application/json");
httppost.setHeader("Content-type", "application/json");
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection" + e.toString());
//throw new CustomException("Could not establish network connection");
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "utf-8"), 8);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = "0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result = sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
//throw new CustomException("Error parsing the response");
}
return result;
}
Where url is the link to my php webpage . On my php page , i am just trying to print out the posted data by doing :
print_r($_POST);
But it shows an empty array . I even tried using the REST addon for firefox and doing the same but it simply shows a blank array .
Would be great if someone could point out if i am missing anything .
Thanks.
you need to get the json content like below :
if(isset($_POST))
{
$json = file_get_contents('php://input');
$jsonObj = json_decode($json);
echo $jsonObj;
}
This question already has answers here:
How can I fix 'android.os.NetworkOnMainThreadException'?
(66 answers)
Closed 9 years ago.
This is the code I have so far.
public void postData(String toPost) {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.mywebsite.com/dev/reverser.php");
//This is the data to send
String MyName = toPost; //any data to send
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("action", MyName));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String response = httpclient.execute(httppost, responseHandler);
//This is the response from a php application
String reverseString = response;
Toast.makeText(this, "response" + reverseString, Toast.LENGTH_LONG).show();
} catch (ClientProtocolException e) {
Toast.makeText(this, "CPE response " + e.toString(), Toast.LENGTH_LONG).show();
// TODO Auto-generated catch block
} catch (IOException e) {
Toast.makeText(this, "IOE response " + e.toString(), Toast.LENGTH_LONG).show();
// TODO Auto-generated catch block
}
}//end postData()
Can somebody please tell me what is wrong in the following code! I have established that there is a problem in the try catch block only and not anywhere else in the activity. I just do not know what it is or how to correct it.
My PHP code is quite simple. It is something like this -
//code to reverse the string
$reversed = strrev($_POST["action"]);
echo $reversed;
In a comment above you indicated that you are getting a android.os.NetworkOnMainThreadException.
In the most recent versions of Android you are not allowed to do networking on the main thread as it makes the UI unresponsive. Move your code to a different thread using AsyncTask (see the Android developer guide for details) or some other mechanism.
Adding as a seperate answer as the poster requests to do so .
Assumption :
a ) There is a text box that accepts the URL to load
b ) A button which when clicked performs the networking operation on the URL fetched f
Implement a button click listener that calls the following function :
private void URL()
{
String url = txtURL.getText().toString();
new URLTask().execute(new String[] { url });
}
private class URLTask extends AsyncTask<String, Void, String>
{
protected String doInBackground(String... urls)
{
BufferedReader br = null;
String url = urls[0];
StringBuffer sb = new StringBuffer("");
try
{
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost();
request.setURI(new URI(url));
List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("param1", "value of param1"));
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
request.setEntity(formEntity);
HttpResponse response = client.execute(request);
String line;
br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
while ((line = br.readLine()) != null)
{
sb.append(line + "\n");
}
br.close();
}
catch(Exception e)
{
Toast.makeText(HttpPostActivity.this, "Exception: " + e.toString(), Toast.LENGTH_LONG).show();
}
finally
{
if (br != null)
{
try
{
br.close();
}
catch(IOException ioe)
{
ioe.printStackTrace();
}
}
}
return(sb.toString());
}
protected void onPostExecute(String result)
{
txtContent.setText(result);
}
You need to implement onPostExecute as well . There are other APIS .
Android Async Task Documentation
Try printing out the exception .
Use this code to print out your response . Check the status of the response
HttpResponse response = client.execute(request);
String line;
br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
while ((line = br.readLine()) != null)
{
sb.append(line + "\n");
}
br.close();
}
catch(Exception e)
{
Toast.makeText(HttpPostActivity.this, "Exception: " + e.toString(), Toast.LENGTH_LONG).show();
}
Tell us the exception . It would be easy to pinpoint your problems then .
EDIT : ANSWER :
You are trying to perform a networking operation on the MAIN thread . This is an illegal thing to do . Create a AsyncTask i.e create a seperate thread to do your networking operations .
Android Details of the exception
Stackoverflow question
I want to post String data over HttpClient in android
but i'm tired after receive response status code 503 - service unavailable and
return response as Html code for our url.
I write in the following Code in JAVA Application and i return the data but when I write the same code in Android Application i receive an exception file I/O not found, I'm Puzzled for this case:
public void goButton(View v)
{
try{
URL url = new URL("https://xxxxxxxxx");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
Test ts= new ApiRequest("null","getUserbyID",new String[] { "66868706" });
String payLoad = ts.toString(); //toSting is override method that create //JSON Object
System.out.println("--->>> " + payLoad);
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
System.out.println("=================>>> "+ payLoad);
wr.write(payLoad);
wr.flush();
BufferedReader rd = new BufferedReader(new nputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
System.out.println("-->> " + line);
response += line;
}
wr.close();
rd.close();
System.out.println("=================>>> "+ response);
} catch (Exception e) {
e.printStackTrace();
System.out.println("=================>>> " + e.toString());
throw new RuntimeException(e);
}
I try to put this code in AsynTask, Thread but i receive the same response status code.
I write in the following Android code as an example data
public void goButton(View v)
{
try{
new Thread(new Runnable() {
public void run() {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(),
10000); // Timeout Limit
HttpResponse response;
String url = "https://xxxxxxxxxxxxx";
JSONObject json = new JSONObject();
try {
HttpPost post = new HttpPost(url);
post.setHeader("Content-type", "application/json");
json.put("service","null");
json.put("method", getUserByID.toString());
json.put("parameters", "1111");
System.out.println(">>>>>>>>>>>" + json.toString());
StringEntity se = new StringEntity(json.toString());
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,
"application/json"));
post.setEntity(se);
String response = client.execute(post);
if (response != null) {
String temp = EntityUtils.toString(response.getEntity());
System.out.println(">>>>>>>>>>>" + temp);
}
} catch (Exception e) {
e.printStackTrace();
System.out.println(">>>>>>>>>>>" + e.getMessage());
}
}
}).start();
}
Please Help me to find solution for this problem :(
Thank you in advance
Here is an code snippet , hoping it will help you.
1)An function which carries the http get service
private String SendDataFromAndroidDevice() {
String result = "";
try {
HttpClient httpclient = new DefaultHttpClient();
HttpGet getMethod = new HttpGet("your url + data appended");
BufferedReader in = null;
BasicHttpResponse httpResponse = (BasicHttpResponse) httpclient
.execute(getMethod);
in = new BufferedReader(new InputStreamReader(httpResponse
.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
while ((line = in.readLine()) != null) {
sb.append(line);
}
in.close();
result = sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
2) An Class which extends AsyncTask
private class HTTPdemo extends
AsyncTask<String, Void, String> {
#Override
protected void onPreExecute() {}
#Override
protected String doInBackground(String... params) {
String result = SendDataFromAndroidDevice();
return result;
}
#Override
protected void onProgressUpdate(Void... values) {}
#Override
protected void onPostExecute(String result) {
if (result != null && !result.equals("")) {
try {
JSONObject resObject = new JSONObject(result);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
3) Inside your onCreate method
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView("your layout");
if ("check here where network/internet is avaliable") {
new HTTPdemo().execute("");
}
}
This code snippet ,
Android device will send the data via URL towards Server
now server needs to fetch that data from the URL
Hey Mohammed Saleem
The code snippet provided by me works in the following way,
1)Android device send the URL+data to server
2)Server [say ASP.NET platform used] receive the data and gives an acknowledgement
Now the Code which should be written at client side (Android) is provided to you, the later part of receiving that data at server is
Server needs to receive the data
An webservice should be used to do that
Implement an webservice at server side
The webservice will be invoked whenever android will push the URL+data
Once you have the data ,manipulated it as you want