I am trying to insert data to a mysql table using the below methods but am not able to do so. Any idea on where I may be going wrong?
Method 1: Using HTTPClient to directly access the URL. Below is the code:
DefaultHttpClient client = new DefaultHttpClient();
HttpGet httpPost = new HttpGet("http://<lclhst>/GnPServlet/GetNpostServlet/? account=1&password=123");
HttpResponse execute = client.execute(httpPost);
Method 2: Using URL connection to directly access the URL. Below is the code:
URL url = new URL("http://<lclhst>/GnPServlet/GetNpostServlet/? account=1&password=123");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Accept", "application/octet-stream");
conn.connect();
Method 3: Using Arraylist to pass values.
When i run the URL from the browser i get the success message "Inserted" and the data is inserted into the DB. But the same when tried through the app does not insert data. Below is the servlet code:
private String accountLookup(String acct, String pwd)
{
Connection con = null;
Statement st = null;
StringBuffer msgb = new StringBuffer("");
try
{
// These will vary depending on your server/database
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/dbone?user=root&password=root");
Statement stmt = con.createStatement();
stmt.executeUpdate("insert into accttbl(address, description, time) values ('test 07-jul',ok,12:12)");
return "Inserted";
}
catch (Exception e)
{
return e.toString();
}
}
The below code inserts data but it opens the browser which I dont want. Also the data insertion is not always successful.
String url = "http://10.0.2.2:8080/GnPServlet/GetNpostServlet";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
conn.setRequestMethod("POST");
Looks like you're sending a POST when the servlet expects a GET (which is what the browser would send if you just paste the URL into the URL bar)
conn.setRequestMethod("GET");
...is most likely what you want since your parameters are encoded in the URL.
Also, are you sure that the spaces in your URL before account should be there?
Related
I have prepared one API, and I want to send one specific data with json posting.
My code works fine during working with Fiddler or site side.
But the problem is why some character didn't send, when we use Android version as a client device.
For example:
string a="mn✈" // correct on any device (android,site,Fiddler,...)
string b="mn✉" //correct on any device except(android) //getting 500 reponse
String requestURL = Utils.SERVER_URL + "PostJsonFeatures";
HttpURLConnection conn = (HttpURLConnection) new URL(requestURL).openConnection();
conn.setReadTimeout(15000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type", "application/json");
JSONObject postDataParams = new JSONObject();
postDataParams.put("Features", getAttributes());
postDataParams.put("productId", productId);
postDataParams.put("groupId", catId);
postDataParams.put("brandId", PrefManager.getInstance(context).getCompanyId());
postDataParams.put("languageId", PrefManager.getInstance(context).getLanguageApi());
DataOutputStream printout = new DataOutputStream(conn.getOutputStream ());
printout.write(postDataParams.toString().getBytes());
printout.flush ();
printout.close ();
You can decode to string and pass in url.
String parseString = URLDecoder.decode(URLEncoder.encode(myString, "UTF-8"), "ISO-8859-1");
I'm trying to parse the json data from an url, when i try to create connection , it throws the exception as
java.net.ProtocolException: cannot write request body after response has been read
I got the response message as Not found.
and i checked the url in web browser it shows the Json data when i login wuth my credentials.
so, i found that i need to add the cookie to my connection, but i don't know how to do this.
public void parseData(String cookie){
HttpUrlConnection connection;
try{
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestProperty("Cookie", cookie);
Log.e(TAG, "cookie " + cookie);
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("GET");
connection.connect();
Log.e(TAG,connection.getResponseMessage());
/**
here i'm trying to parse the data
using BufferedReader calss
**/
}
catch(IOException e){}
}
i need to add the cookie in connection.
Please help me on this.
According to this link
you can do this:
Values must be set prior to calling the connect method:
URL myUrl = new URL("http://www.hccp.org/cookieTest.jsp");
URLConnection urlConn = myUrl.openConnection();
Create a cookie string:
String myCookie = "userId=igbrown";
Add the cookie to a request: Using the
setRequestProperty(String name, String value); method, we will add a
property named "Cookie", passing the cookie string created in the
previous step as the property value.
urlConn.setRequestProperty("Cookie", myCookie);
Send the cookie to the server: To send the cookie, simply call connect() on the URLConnection
for which we have added the cookie property:
urlConn.connect()
Context: In Android, when I use Java's HttpURLConnection object as shown below, I see the POST body correctly on the server side. However, when I use what I believe is the equivalent HttpClient code, the POST body is empty.
Question:
What am I missing?
Server-side is a Django-python server. I have set up a debug point at the entry point of this endpoint but the post body is already empty. How can I debug through it to find out why the body is null?
Note: I already looked at this , but the solution does not work for me.
Code: using HttpURLConnection - this works:
try {
URL url = new URL("http://10.0.2.2:8000/accounts/signup/");
String charset = "UTF-8";
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty ("Authorization", "Basic base64encodedstring==");
connection.setRequestProperty("Accept-Charset", charset);
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded; charset=" + charset);
connection.setDoInput(true);
StringBuilder sb = new StringBuilder();
sb.append("appver=6&user=value1pw=&hash=h1");
OutputStreamWriter outputWriter = new
OutputStreamWriter(connection.getOutputStream());
outputWriter.write(sb.toString());
outputWriter.flush();
outputWriter.close();
// handle response
} catch () {
// handle this
}
============================================================
Code: using Apache httpclient - does NOT work - server gets empty POST body:
HttpPost mHttpPost = new HttpPost(""http://10.0.2.2:8000/accounts/signup/"");
mHttpPost.addHeader("Authorization", "Basic base64encodedstring==");
mHttpPost.addHeader("Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8");
mHttpPost.addHeader("Accept-Charset", "UTF-8");
String str = "appver=6&user=value1pw=&hash=h1"; // same as the above
StringEntity strEntity = new StringEntity(str);
mHttpPost.setEntity(strEntity);
HttpUriRequest pHttpUriRequest = mHttpPost;
DefaultHttpClient client = new DefaultHttpClient();
httpResponse = client.execute(pHttpUriRequest);
// more code
I figured the reason why this was happening:
The authorization header in the POST request had an extra new line character "\n" - this was causing the request to go through to the server side handler, but with the body getting cut off. I have never noticed this behavior before.
I want to send my id & password to server and get the response from server. Here is my code. It is not working for the first time. But iam getting the response from server if i execute my application on second time. It is throwing "Post method failed: -1 null" on first time. Where iam wrong?? Why if() block is executing on first time?? could you please tell me.
HttpsURLConnection con = null;
String httpsURL = "https://www.abc.com/login";
String query = "id=xyz&password=pqr";
URL url = new URL(httpsURL);
con = (HttpsURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-length", String.valueOf(query.length()));
con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
con.setRequestProperty("User-Agent","Mozilla/4.0(compatible; MSIE 5.0; Windows 98; DigExt)");
con.setDoInput(true);
con.setDoOutput(true);
DataOutputStream output = new DataOutputStream(con.getOutputStream());
output.writeBytes(query);
output.close();
int respCode = con.getResponseCode();
if (respCode != HttpsURLConnection.HTTP_OK)
{
throw new Exception("POST method failed: " + con.getResponseCode()+ "\t" + con.getResponseMessage()); }
else {
//read the content from server
}
1/ It is recommanded to use apache HttpClient rather than URLConnection (see http://developer.android.com/reference/org/apache/http/impl/client/DefaultHttpClient.html)
2/ for login and password, why not use Http Authentication ? both basic and digest are supported by android.
3/ as for you problem, you don't close the underlying outputStream.
you should do:
OutputStream os = con.getOutputStream();
DataOutputStream output = new DataOutputStream(os);
output.writeBytes(query);
output.close();
os.close();
Check Server service validity with other technology and/or classic java. You didn say in your question if you succeed to discriminate the server from the issue.
from java doc ...getResponseCode returns -1 if no code can be discerned from the response (i.e., the response is not valid HTTP).
Java https post request example : http://www.java-samples.com/java/POST-toHTTPS-url-free-java-sample-program.htm
try to close your outputstream after querying the status and not before...that may help
Here is how you should send POST requests in Android
HttpPost httpGet = new HttpPost(server + "/login?email="+username+"&password="+password);
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute(httpGet);
You can read response using:
response.getEntity().getContent()
I have to connect to a webserver from android and I have to access a webservice and a webpage from the webserver. Can anybody help me? Please give step by step process with some code snippets because I am new to android and I don't know anything in connecting to a webserver.
You can use an HttpClient:
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(uri);
HttpResponse httpResponse = httpClient.execute(httpGet);
BufferedReader reader = new BufferedReader(
new InputStreamReader(httpResponse.getEntity().getContent()));
// user reader to read & parse response
reader.close();
Parsing the response obviously depends on the format (e.g. SOAP, JSON, etc.)
You haven't given very much info (what kind of web page, XML/JSON/HTML/etc. ?). But the basic principles of regular Java apply. Using URL and InputStream:
URL url = new URL(...);
InputStream is = url.openStream();
And from there it depends what kind of data you're dealing with.
If you don't want to use an additional library, here is a means for sending an "id" and "name" to a server:
URL url = null;
try {
String registrationUrl = String.format("http://myserver/register?id=%s&name=%s", myId, URLEncoder.encode(myName,"UTF-8"));
url = new URL(registrationUrl);
URLConnection connection = url.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection) connection;
int responseCode = httpConnection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
Log.d("MyApp", "Registration success");
} else {
Log.w("MyApp", "Registration failed for: " + registrationUrl);
}
} catch (Exception ex) {
ex.printStackTrace();
}
You could just as easily send other data via this URI "GET" style, but if you need to send something more detailed a POST will be required.
Note: Originally posted to answer a similar question here: How to connect android to server