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How can i create user in salesforce through REST api? Give me some examples

Am trying to create user into my salesforce account through REST api using java.But its returning 400 status code.Can you please guide me?
Here is the code am trying:
public static void createUsers() {
System.out.println("\n_______________ USER INSERT _______________");
String uri = baseUri + "/sobjects/User/";
System.out.println(uri);
try {
//create the JSON object containing the new lead details.
JSONObject lead = new JSONObject();
lead.put("FirstName", "Jake");
lead.put("LastName", "sully");
lead.put("Alias", "Jake");
lead.put("Email", "Jake#gmail.com");
lead.put("Username", "Jake#gmail.com");
lead.put("Name", "jake");
lead.put("UserRoleId","00E28000000oD8EEAU");
lead.put("Id", "10028000000GLSIAA4");
lead.put("EmailEncodingKey", "ISO-8859-1");
lead.put("TimeZoneSidKey", "Asia/Kolkata");
lead.put("LocaleSidKey", "en_US");
lead.put("ProfileId", "00e280000027hnGAAQ");
lead.put("LanguageLocaleKey", "en_US");
//Construct the objects needed for the request
HttpClient httpClient = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(uri);
httpPost.addHeader(oauthHeader);
httpPost.addHeader(prettyPrintHeader);
// The message we are going to post
StringEntity body = new StringEntity(lead.toString(1));
body.setContentType("application/json");
httpPost.setEntity(body);
//Make the request
HttpResponse response = httpClient.execute(httpPost);
//Process the results
System.out.println(response.toString());
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 201) {
String response_string = EntityUtils.toString(response.getEntity());
JSONObject json = new JSONObject(response_string);
// Store the retrieved lead id to use when we update the lead.
leadId = json.getString("id");
} else {
System.out.println("Insertion unsuccessful. Status code returned is " + statusCode);
}
} catch (JSONException e) {
System.out.println("Issue creating JSON or processing results");
e.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (NullPointerException npe) {
npe.printStackTrace();
}
}

How can I view the full URL after using MultipartEntityBuilder?

I am fairly confident this code works (I used it in another part of my project for a different API) as far as posting but I do not think the URL is being formatted correctly. I want to know if there is anyway to view the full URL after building all of the entities so I can see if the final URL is formatted correctly. Code:
My URL = http://pillbox.nlm.nih.gov/PHP/pillboxAPIService.php
Method = POST
API key = not going to post (works though)
drugName = just a string that has the name of a drug
I have logs in the code to try and view the url but they aren't returning anything close and the debugger isn't either.
I am trying to build the URL to look like this:
http://pillbox.nlm.nih.gov/PHP/pillboxAPIService.php?key=My_API_KEY&ingredient=diovan
public String makeServiceCallPillBox(String url, int method,
String api, String drugName)
{
String resultEnitity = null;
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse httpResponse = null;
HttpEntity entityResult = null;
// Checking http request method type
if (method == POST)
{
HttpPost httpPost = new HttpPost(url);
// Butild the parameters
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
builder.addTextBody("key", api);
builder.addTextBody("ingredient", drugName);;
final HttpEntity entity = builder.build();
httpPost.setEntity(entity);
Log.d("url", httpPost.toString());
httpResponse = httpClient.execute(httpPost);
Log.d("post", builder.toString());
Log.d("post2", entity.toString());
entityResult = httpResponse.getEntity();
resultEnitity = EntityUtils.toString(entityResult);
Log.d("result", resultEnitity);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return resultEnitity;
}
Any help is appreciated.

Android application database connectivity with web app using Jsp

I am developing a web app in JSP. For same project I'm developing an Android app. The web app uses Apache Tomcat and MySQL. Now I want to log in from the Android application by retrieving data from MySQL database. But how?
I did find many tutorials but all are using PHP scripts. I'm using Eclipse for both apps.

For android Try this.
private static HttpClient getHttpClient() {
if (mHttpClient == null) {
mHttpClient = new DefaultHttpClient();
final HttpParams params = mHttpClient.getParams();
HttpConnectionParams.setConnectionTimeout(params, HTTP_TIMEOUT);
HttpConnectionParams.setSoTimeout(params, HTTP_TIMEOUT);
ConnManagerParams.setTimeout(params, HTTP_TIMEOUT);
}
return mHttpClient;
}
And then
public static String sendFirst(String requestString) throws Exception {
BufferedReader in = null;
try {
HttpClient client = getHttpClient();
HttpPost request = new HttpPost(universal_URL_MENU+"?request_menu="+start_menu);
HttpResponse response = client.execute(request);
System.out.println("response in class"+response);
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();
result = sb.toString();
// }
}catch(Exception e){
e.printStackTrace();
System.out.println("catch");
}
finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
Where
public static String universal_URL_MENU = "http://192.***.1.#:9999/my_Project/ReqFromTabFor.do";
Now for Jsp or Servlet
try{
PrintWriter out=res.getWriter();
String subcategory=req.getParameter("request_menu");
System.out.println("Receive : "+subcategory);
JSONObject jobj=UserDelegate.reqFromTabForMenuBySCatg(subcategory);
}
if(jobj!=null){
out.println(jobj);
}else{
out.print("Sorry Not Available");
}
}catch(Exception e){ e.printStackTrace(); }

What happens between the client (your Android app) and the server is loosely coupled, meaning that they are not related whatsoever except for the protocol with which they communicate, which for a web service is HTTP.
Usually a client (either an app or a web browser) makes an HTTP request sending parameters (e.g. login, password) with POST or GET methods. The server takes these parameters and processes them according to its needs.
This may sound obvious, but you say that all the tutorials are using php script, so you seem confused: your problem on Android? or is your problem in the server?
The code you need in your Android app is EXACTLY THE SAME regardless of the server technology (asp, cgi, jsp, php...) and database (MySql, Oracle...), because the HTTP protocol is standard.
Here is an example I copied from here to make a simple HTTP request with two POST parameters.
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("stringdata", "AndDev is Cool!"));
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
}
}

Android, uploading a photo to host on imgur programatically

I have tried different methods to upload and retrieve a link via imgur but none have been successfull despite looking at the imgur api.
http://api.imgur.com/examples#uploading_java
But the following methods partly works..
im trying to retrieve,
errors: if any errors occured.
link to image: the link to the image hosted
delete link: the link to delete the image hosted
But i only end up with the "delete link", as the others are blank,
check it out:
public void post(String path) {
List<NameValuePair> postContent = new ArrayList<NameValuePair>(2);
postContent.add(new BasicNameValuePair("key", DEV_KEY));
postContent.add(new BasicNameValuePair("image", path));
String url = "http://api.imgur.com/2/upload";
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(url);
try {
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
for(int index=0; index < postContent.size(); index++) {
if(postContent.get(index).getName().equalsIgnoreCase("image")) {
// If the key equals to "image", we use FileBody to transfer the data
entity.addPart(postContent.get(index).getName(), new FileBody(new File (postContent.get(index).getValue())));
} else {
// Normal string data
entity.addPart(postContent.get(index).getName(), new StringBody(postContent.get(index).getValue()));
}
}
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost, localContext);
mImgurResponse = parseResponse (response);
Iterator it = mImgurResponse.entrySet().iterator();
while(it.hasNext()){
HashMap.Entry pairs = (HashMap.Entry)it.next();
Log.i("INFO",pairs.getKey().toString());
if(pairs.getValue()!=null){
reviewEdit.setText(pairs.getValue().toString());
Log.i("INFO",pairs.getValue().toString());
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private Map<String,String> parseResponse(HttpResponse response) {
String xmlResponse = null;
try {
xmlResponse = EntityUtils.toString(response.getEntity());
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (xmlResponse == null) return null;
HashMap<String, String> ret = new HashMap<String, String>();
ret.put("error", getXMLElementValue(xmlResponse, "error_msg"));
ret.put("delete", getXMLElementValue(xmlResponse, "delete_page"));
ret.put("original", getXMLElementValue(xmlResponse, "original_image"));
return ret;
}
private String getXMLElementValue(String xml, String elementName) {
if (xml.indexOf(elementName) >= 0)
return xml.substring(xml.indexOf(elementName) + elementName.length() + 1,
xml.lastIndexOf(elementName) - 2);
else
return null;
}
All i get back in the end is a hashmap mImageResponse with only the delete link...
any ideas on what im doing wrong?

The fix to this was merely to change the URL to: imgur.com/api/upload.xml

HttpPost works in Java project, but not on Android

I've written some code for my Android device to login to a web site over HTTPS and parse some data out of the resulting pages. An HttpGet happens first to get some info needed for login, then an HttpPost to do the actual login process.
The code below works great in a Java project within Eclipse which has the following JAR files on the build path: httpcore-4.1-beta2.jar, httpclient-4.1-alpha2.jar, httpmime-4.1-alpha2.jar, and commons-logging-1.1.1.jar.
public static MyBean gatherData(String username, String password) {
MyBean myBean = new MyBean();
try {
HttpResponse response = doHttpGet(URL_PAGE_LOGIN, null, null);
System.out.println("Got login page");
String content = EntityUtils.toString(response.getEntity());
String token = ContentParser.getToken(content);
String cookie = getCookie(response);
System.out.println("Performing login");
System.out.println("token = "+token +" || cookie = "+cookie);
response = doLoginPost(username,password,cookie, token);
int respCode = response.getStatusLine().getStatusCode();
if (respCode != 302) {
System.out.println("ERROR: not a 302 redirect!: code is \""+ respCode+"\"");
if (respCode == 200) {
System.out.println(getHeaders(response));
System.out.println(EntityUtils.toString(response.getEntity()).substring(0, 500));
}
} else {
System.out.println("Logged in OK, loading account home");
// redirect handler and rest of parse removed
}
}catch (Exception e) {
System.out.println("ERROR in gatherdata: "+e.toString());
e.printStackTrace();
}
return myBean;
}
private static HttpResponse doHttpGet(String url, String cookie, String referrer) {
try {
HttpClient client = new DefaultHttpClient();
client.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
client.getParams().setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, "UTF-8");
HttpGet httpGet = new HttpGet(url);
httpGet.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
httpGet.setHeader(HEADER_USER_AGENT,HEADER_USER_AGENT_VALUE);
if (referrer != null && !referrer.equals("")) httpGet.setHeader(HEADER_REFERER,referrer);
if (cookie != null && !cookie.equals("")) httpGet.setHeader(HEADER_COOKIE,cookie);
return client.execute(httpGet);
} catch (Exception e) {
e.printStackTrace();
throw new ConnectException("Failed to read content from response");
}
}
private static HttpResponse doLoginPost(String username, String password, String cookie, String token) throws ClientProtocolException, IOException {
try {
HttpClient client = new DefaultHttpClient();
client.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
client.getParams().setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, "UTF-8");
HttpPost post = new HttpPost(URL_LOGIN_SUBMIT);
post.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
post.setHeader(HEADER_USER_AGENT,HEADER_USER_AGENT_VALUE);
post.setHeader(HEADER_REFERER, URL_PAGE_LOGIN);
post.setHeader(HEADER_COOKIE, cookie);
post.setHeader("Content-Type","application/x-www-form-urlencoded");
List<NameValuePair> formParams = new ArrayList<NameValuePair>();
formParams.add(new BasicNameValuePair("org.apache.struts.taglib.html.TOKEN", token));
formParams.add(new BasicNameValuePair("showLogin", "true"));
formParams.add(new BasicNameValuePair("upgrade", ""));
formParams.add(new BasicNameValuePair("username", username));
formParams.add(new BasicNameValuePair("password", password));
formParams.add(new BasicNameValuePair("submit", "Secure+Log+in"));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams,HTTP.UTF_8);
post.setEntity(entity);
return client.execute(post);
} catch (Exception e) {
e.printStackTrace();
throw new ConnectException("ERROR in doLoginPost(): "+e.getMessage());
}
}
The server (which is not under my control) returns a 302 redirect when the login was successful, and 200 if it fails and re-loads the login page. When run with the above JAR files I get the 302 redirect, however if I run the exact same code from an Android project with the 1.6 Android JAR file on the build path I get the 200 response from the server. I get the same 200 response when running the code on my 2.2 device.
My android application has internet permissions, and the HttpGet works fine. I'm assuming that the problem lies in the fact that HttpPost (or some other class) is different in some significant way between the Android JAR version and the newer Apache versions.
I've tried adding the Apache libraries to the build path of the Android project, but due to the duplicate classes I get messages like: INFO/dalvikvm(390): DexOpt: not resolving ambiguous class 'Lorg/apache/http/impl/client/DefaultHttpClient;' in the log. I've also tried using a MultipartEntity instead of the UrlEncodedFormEntity but I get the same 200 result.
So, I have a few questions:
Can I force the code running under Android to use the newer Apache libraries in preference to the Android versions?
If not, does anyone have any ideas how can I alter my code so that it works with the Android JAR file?
Are there any other, totally different approaches to doing an HttpPost in Android?
Any other ideas?
I've read a lot of posts and code, but I'm not getting anywhere.

I have now given up on getting the HttpClient route to give the expected response from the server when run on Android. Instead I rewrote the doPost method above to use an HttpsURLConnection instead. Here's the new (working) version in the hope that it's useful to someone.
private static LoginBean altPost(String username, String password, String cookie, String token){
LoginBean loginBean = new LoginBean();
HttpsURLConnection urlc = null;
OutputStreamWriter out = null;
DataOutputStream dataout = null;
BufferedReader in = null;
try {
URL url = new URL(URL_LOGIN_SUBMIT);
urlc = (HttpsURLConnection) url.openConnection();
urlc.setRequestMethod("POST");
urlc.setDoOutput(true);
urlc.setDoInput(true);
urlc.setUseCaches(false);
urlc.setAllowUserInteraction(false);
urlc.setRequestProperty(HEADER_USER_AGENT, HEADER_USER_AGENT_VALUE_FF);
urlc.setRequestProperty("Cookie", cookie);
urlc.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
String output = "org.apache.struts.taglib.html.TOKEN="+ URLEncoder.encode(token, HTTP.UTF_8)
+"&showLogin=true&upgrade=&username="+ URLEncoder.encode(username, HTTP.UTF_8)
+"&password="+ URLEncoder.encode(password, HTTP.UTF_8)+"&submit="
+URLEncoder.encode("Secure+Log+in", HTTP.UTF_8);
dataout = new DataOutputStream(urlc.getOutputStream());
// perform POST operation
dataout.writeBytes(output);
// get response info
loginBean.setResponseCode(urlc.getResponseCode());
// get required headers
String headerName = null;
StringBuffer newCookie = new StringBuffer(100);
String redirectLocation = "";
for (int i=1; (headerName = urlc.getHeaderField(i)) != null;i++) {
if (headerName.indexOf(COOKIE_VALUE_SESSION) > -1) {
if (newCookie.length() > 0) {newCookie.append("; ");}
newCookie.append(headerName);
}
if (headerName.indexOf(COOKIE_VALUE_AUTH) > -1) {
if (newCookie.length() > 0) {newCookie.append("; ");}
newCookie.append(headerName);
}
if (headerName.indexOf("https://") > -1) {
redirectLocation = headerName;
}
}
loginBean.setCookie(newCookie.toString());
loginBean.setRedirectUrl(redirectLocation);
in = new BufferedReader(new InputStreamReader(urlc.getInputStream()),8096);
String response;
// write html to System.out for debug
while ((response = in.readLine()) != null) {
System.out.println(response);
}
in.close();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return loginBean;
}
I still have no idea why the HttpClient way didn't work properly.

To avoid the collisions, use this JAR file for httpclient:
httplib
And this post would also be very useful:
An answer to Stack Overflow question Apache HTTP client or URLConnection

Is it possible that this website does user-agent detection and actually returns different results because it's Android? Given that 200 implies success, why must it give a 302 instead of a 200? Have you printed out the result that you get when it returns a 200, and does it give any additional information?

Check the RedirectHandler, override the default one and do some logging in it, I had problems with that when going to Android...