I'm trying to convert this Python code using the Python Requests HTTP library into Java code (for Android).
import requests
payload = {"attr[val1]":123,
"attr[val2]":456,
"time":0,
"name":"Foo","surname":"Bar"}
r = requests.post("http://jakiro.herokuapp.com/api", data=payload)
r.status_code
r.text
This is what I've done so far:
protected void sendJson() {
Thread t = new Thread() {
public void run() {
Looper.prepare(); //For Preparing Message Pool for the child Thread
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); //Timeout Limit
HttpResponse response;
JSONObject json = new JSONObject();
try {
Log.v("SOMETHING_NAME3", "Creating POST");
HttpPost post = new HttpPost("http://jakiro.herokuapp.com/api");
json.put(MessageAttribute.SURNAME, "Bar");
json.put(MessageAttribute.VAL1, 123);
json.put(MessageAttribute.VAL2, 456);
json.put(MessageAttribute.name, "Foo");
json.put(MessageAttribute.TIME, 0);
StringEntity se = new StringEntity( json.toString() );
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
post.setEntity(se);
response = client.execute(post);
/*Checking response */
if(response!=null){
InputStream in = response.getEntity().getContent(); //Get the data in the entity
String foo = convertStreamToString(in);
Log.v("SOMETHING_NAME2", foo); // Gives me "Bad request"
}
} catch(Exception e) {
e.printStackTrace();
Log.v("SOMETHING_NAME", "Cannot Establish Connection");
}
Looper.loop(); //Loop in the message queue
}
};
t.start();
}
I've checked the response with response.getStatusLine().getStatusCode() and I get back a 400 from the server. The Python code works fine, but in Java on an Android device it doesn't. I can't see to figure out why though.
#Blender's link was the correct solution at the link: How to use parameters with HttpPost
The correct way to url-encode was to create BasicNameValuePairs and encode that as such:
postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("param1", "param1_value"));
postParameters.add(new BasicNameValuePair("param2", "param2_value"));
httppost.setEntity(new UrlEncodedFormEntity(postParameters));
Related
I have used php for server side and my client(A java program) sends a post request with json data as parameter. I am able to receive the data but the jsonData is no decoding. I am sending a valid JSON.
Below is my Client program.
public class ExampleHttpPost
{
public static void main(String args[]) throws ClientProtocolException, IOException
{
HttpPost httppost = new HttpPost("http://localhost/hello.php");
List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
try {
parameters.add(new BasicNameValuePair("data", (new JSONObject("{\"imei\":\"imei1\"}")).toString()));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
httppost.setEntity(new UrlEncodedFormEntity(parameters));
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(httppost);
HttpEntity resEntity = httpResponse.getEntity();
// Get the HTTP Status Code
int statusCode = httpResponse.getStatusLine().getStatusCode();
// Get the contents of the response
InputStream input = resEntity.getContent();
String responseBody = IOUtils.toString(input);
input.close();
// Print the response code and message body
System.out.println("HTTP Status Code: "+statusCode);
System.out.println(responseBody);
}
}
And my hello.php
<?php
$data = $_POST['data'];
var_dump($data);
$obj = json_decode($data);
if($obj==NULL){
echo "Decoding error";
}
echo $obj['imei'];
?>
Output :
HTTP Status Code: 200
string(20) "{\"imei\":\"imei1\"}"
Decoding error
It seems like your Java Application is adding slashes to the string or as suggested in the comments the PHP app is probably adding slashes to the quotes to avoid SQL injection
Try if you can get it to work by adding
$data = stripslashes($data);
Above the json_decode part
how to start thread? or when call the sendJson() function so that thread will get started automatically?
One more thing, I would like to start a thread and execute the sendJson() every 5 minutes in background.
public void sendJson(final JSONObject json) {
Thread t = new Thread() {
public void run() {
Log.d(null,"Sync Thread Start");
Looper.prepare(); //For Preparing Message Pool for the child Thread
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); //Timeout Limit
HttpResponse response;
try {
HttpPost httpPost = new HttpPost(global.Server + "/BusTicket/sync/sync.php");
// Prepare JSON to send by setting the entity
httpPost.setEntity(new StringEntity(json.toString(), "UTF-8"));
// Set up the header types needed to properly transfer JSON
httpPost.setHeader("Content-Type", "application/json");
httpPost.setHeader("Accept-Encoding", "application/json");
httpPost.setHeader("Accept-Language", "en-US");
response = client.execute(httpPost);
StatusLine statusLine = response.getStatusLine();
String responseString = null;
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
Log.d(null,"responseString = "+ responseString );
}
/*Checking response */
if(response!=null){
InputStream in = response.getEntity().getContent(); //Get the data in the entity
Log.d(null,"Sync Reponse= "+ convertStreamToString(in));
Log.d(null,"Sync Reponse= "+ in.toString() );
}
} catch(Exception e) {
e.printStackTrace();
}
Looper.loop(); //Loop in the message queue
}
};
}
This is just the declaration, to start it, use:
t.start();
More info here. To know how to run your Thread periodically, see this.
I've tried several things but my android app is not sending post parameters. I run the app on a virtual device. This is the code:
#Override
public void run() {
try{
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(page);
HttpParams httpParams = client.getParams();
httpParams.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 20000);
post.setHeader("Content-type", "application/json");
post.setHeader("Accept", "application/json");
JSONObject obj = new JSONObject();
obj.put("username", "abcd");
obj.put("password", "1234");
post.setEntity(new StringEntity(obj.toString(), "UTF-8"));
HttpResponse response = client.execute(post);
InputStreamReader isr = new InputStreamReader(response.getEntity().getContent());
BufferedReader reader = new BufferedReader(isr);
String line = "";
while((line = reader.readLine()) != null){
System.out.println(line);
}
}catch(Exception e){
e.printStackTrace();
}
}
It should send a post request to a PHP page. This page displays the output of the POST array:
<?php
print_r($_POST);
?>
When I run the app, it displays an empty array.
thats because you're sending JSON
standard php $_POST is build from key-value pairs
so you should post key1=value1&key2=value2
or you should read from
$HTTP_RAW_POST_DATA
or
<?php $postdata = file_get_contents("php://input"); ?>
and use
json_decode( $postdata );
PHP will not automatically decode json for you
you can also use another approach and POST your json like data=YourJsonCode
and then decode it using json_decode( $_POST['data'] );
Try sending url encoded name/value pairs. You can also use EntityUtils to convert the response to a String for you.
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(page);
HttpParams httpParams = client.getParams();
httpParams.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 20000);
post.setHeader("Content-Type","application/x-www-form-urlencoded");
List<NameValuePair> formParams = new ArrayList<NameValuePair>();
formParams.add(new BasicNameValuePair("username", "abcd"));
formParams.add(new BasicNameValuePair("password", "1234"));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams,HTTP.UTF_8);
post.setEntity(entity);
HttpResponse httpResponse = client.execute(post);
System.out.println(EntityUtils.toString(httpResponse.getEntity()));
Problem solved. There was a htaccess file that redirected all non www pages.
For example if we need to send content which is in this format , how do we do it
{"name1":[{"name11":"value11"},{"name11":"value12"},{"name11":"value13"}],"name2":value2}
I know how to set the basic kind
{"name1":"value1","name2":value2}
NameValuePair[] nameValuePairs = new NameValuePair[2];
nameValuePairs[0]= new BasicNameValuePair("name1", "value1");
nameValuePairs[1] = new BasicNameValuePair("name2", value2);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
How can we achieve nesting
Please see this question as it has a couple of answers that should help you. Here is a brief snippet from the answers code:
HttpPost request = new HttpPost(serverUrl);
request.setEntity(new ByteArrayEntity(
postMessage.toString().getBytes("UTF8")));
HttpResponse response = client.execute(request);
The other answer says you can do something like this:
protected void sendJson(final String email, final String pwd) {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); //Timeout Limit
HttpResponse response;
JSONObject json = new JSONObject();
try{
HttpPost post = new HttpPost(URL);
json.put("email", email);
json.put("password", pwd);
StringEntity se = new StringEntity( "JSON: " + json.toString());
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
post.setEntity(se);
response = client.execute(post);
/*Checking response */
if(response!=null){
InputStream in = response.getEntity().getContent(); //Get the data in the entity
}
catch(Exception e){
e.printStackTrace();
createDialog("Error", "Cannot Estabilish Connection");
}
}
I was using Android API, to send some data using http POST method:
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://myapp.com/");
try {
List parameters = prepareHttpParameters();
HttpEntity entity = new UrlEncodedFormEntity(parameters);
httppost.setEntity(entity);
ResponseHandler responseHandler = new BasicResponseHandler();
response = httpclient.execute(httppost, responseHandler);
Toast.makeText(this, response, Toast.LENGTH_LONG).show();
} catch (IOException e) {
// TODO: manage ClientProtocolException and IOException
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
and my parameters are prepared here:
List parameters = new ArrayList(2);
parameters.add(new BasicNameValuePair("usr", "foo" ));
parameters.add(new BasicNameValuePair("pwd", "bar" ));
return parameters;
But it seems to be wrong because I do not get any expected response.
I have tested the same request with same parameters using Curl and I get expected response.
Am I wrong with my code?
Thank you very much
I'd consider the UrlEncodedFormEntity constructor that takes an encoding as the second parameter. Otherwise, off the cuff, this looks OK. You might check on your server logs what you are receiving for these requests. You might also make sure your emulator has Internet connectivity (i.e., has two bars of signal strength), if you are using the emulator.
Here is the relevant portion of a sample app that uses HTTP POST (and a custom header) to update a user's status on identi.ca:
private String getCredentials() {
String u=user.getText().toString();
String p=password.getText().toString();
return(Base64.encodeBytes((u+":"+p).getBytes()));
}
private void updateStatus() {
try {
String s=status.getText().toString();
HttpPost post=new HttpPost("https://identi.ca/api/statuses/update.json");
post.addHeader("Authorization",
"Basic "+getCredentials());
List<NameValuePair> form=new ArrayList<NameValuePair>();
form.add(new BasicNameValuePair("status", s));
post.setEntity(new UrlEncodedFormEntity(form, HTTP.UTF_8));
ResponseHandler<String> responseHandler=new BasicResponseHandler();
String responseBody=client.execute(post, responseHandler);
JSONObject response=new JSONObject(responseBody);
}
catch (Throwable t) {
Log.e("Patchy", "Exception in updateStatus()", t);
goBlooey(t);
}
}