I followed this guide to create my own REST API. I am trying to consume my API that I built from the guide but I ran into some trouble when it came to using any request that wasn't a GET request. When I tried doing a delete request. (http://localhost:8080/api/v1/employees/3)
I would get a 405 error and I'm not sure why (I do not have any password protection in my local host). I want to understand how I can create requests other than GET. I tried using query parameters for my POST request, but it was unsuccessful.
I looked at all the other StackOverFlow Similar Questions and I couldn't find anything.
EDIT1: I am using a simple Java Application to do this.
This was the code I used in order to do my GET requests
String urlString = "http://localhost:8080/api/v1/employees";
try {
String result = "";
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
BufferedReader rd = new BufferedReader (new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
result += line;
}
rd.close();
System.out.println(result);
}
Try to replace this URLConnection conn = url.openConnection();
to this:
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
you can use org.springframework.web.client.RestTemplate (rest-template) to consume rest api.
for delete, you can do something like
private void deleteEmployee() {
Map < String, String > params = new HashMap < String, String > ();
params.put("id", "1");
RestTemplate restTemplate = new RestTemplate();
restTemplate.delete(DELETE_EMPLOYEE_ENDPOINT_URL, params);
}
please check https://www.javaguides.net/2019/06/spring-resttemplate-get-post-put-and-delete-example.html and https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/client/RestTemplate.html and https://www.baeldung.com/rest-template
hope these provide enough info
Related
I am trying to build a Java code to create users in AAD using MSAL and MS Graph API. Below is the code that I am using to create the user. I am able to retrieve the token successfully, however getting exception while trying to POST the request. What am I doing wrong?
public static void main(String[] args) throws Exception {
Map<String,Object> params = new LinkedHashMap<>();
params.put("givenName", "Test");
params.put("displayName", "ABC");
params.put("accountEnabled", true);
params.put("mailNickname","abc");
params.put("userPrincipalName","jcooper#demo.onmicrosoft.com");
StringBuilder postData = new StringBuilder();
for (Map.Entry<String,Object> param : params.entrySet()) {
if (postData.length() != 0) postData.append('&');
postData.append(URLEncoder.encode(param.getKey(), "UTF-8"));
postData.append('=');
postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8"));
}
byte[] postDataBytes = postData.toString().getBytes("UTF-8");
int length =postDataBytes.length;
URL url = new URL("https://graph.microsoft.com/v1.0/users");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type","application/json");
conn.setRequestProperty("Authorization", "Bearer "+accessToken);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setInstanceFollowRedirects(false);
conn.setRequestProperty("Content-Length",Integer.toString(length));
conn.connect();
conn.getInputStream();
try (var wr = new DataOutputStream(conn.getOutputStream())) {
wr.write(postDataBytes);
}
StringBuilder content;
System.out.println(postDataBytes+" "+postData);
try (var br = new BufferedReader(
new InputStreamReader(conn.getInputStream()))) {
String line;
content = new StringBuilder();
while ((line = br.readLine()) != null) {
content.append(line);
content.append(System.lineSeparator());
}
}
System.out.println(content.toString());
}
Exception : Exception in thread "main" java.io.IOException: Server returned HTTP response code: 411 for URL: https://graph.microsoft.com/v1.0/users
According to some test, I met the same issue with yours. It seems the code is correct but do not know why it still show 411 error. It may be caused by the graph api can just accept json request body but you convert the request body to application/x-www-form-urlencoded in your first part of code(I'm not sure because I test the code with json request body but still show 411).
Since you mentioned use MSAL to get access token, you can also continue to use MSAL to create the user. Please refer to this example:
GraphServiceClient graphClient = GraphServiceClient.builder().authenticationProvider( authProvider ).buildClient();
User user = new User();
user.accountEnabled = true;
user.displayName = "Adele Vance";
user.mailNickname = "AdeleV";
user.userPrincipalName = "AdeleV#contoso.onmicrosoft.com";
PasswordProfile passwordProfile = new PasswordProfile();
passwordProfile.forceChangePasswordNextSignIn = true;
passwordProfile.password = "xWwvJ]6NMw+bWH-d";
user.passwordProfile = passwordProfile;
graphClient.users()
.buildRequest()
.post(user);
For accessing Microsoft Graph from a desktop app, I'd use the InteractiveBrowserCredentialBuilder() with the TokenCredentialAuthProvider that comes with GraphSDK to get the Graph token. Check out the great sample code here. All you'd need to do to customize this is to change the last line and set the scopes differently based on what Graph API you need to call. There's a link on the bottom of that page that'll teach you to register your app properly.
The simplest way in a web app is to use Azure AD Spring Boot Starter to get an access token for a logged-in user, and use GraphSDK to call Graph in a Spring 5 web app. See this sample that demonstrates this along with full instructions (Relevant Graph code is is in SampleController.java and Utilities.java)
Im implementing a SOAP web service and it is working with a cURL call. I implemented following this tutorial. The service is working with the following command:
curl --header "content-type: text/xml" -d #request.xml http://localhost:8080/ws
But of course this action has to be free from command prompt and be able to be called whenever necessary, so I want to relate this service to an action when a method is called for example.
So far I found from internet
String url = "http://localhost:8080/ws";
URL obj = new URL(url);
HttpURLConnection conn = (HttpURLConnection) obj.openConnection();
conn.setRequestProperty("Content-Type", "text/xml");
conn.setDoOutput(true);
conn.setRequestMethod("POST");
I assume it should be a POST method but how do I add the "request.xml" and "--header"? What command will finalize the cURL call? Or am I doing this totally wrong and the long way, is there an easier way?
PS: I already have a web service running and Im using Eclipse Oxygen.
Add below lines to your code at the end, it will do the JOB.
OutputStream wr = new DataOutputStream(conn.getOutputStream());
BufferedReader br = new BufferedReader(new FileReader(new File("request.xml")));
//reading file and writing to URL
System.out.println("Request:-");
String st;
while ((st = br.readLine()) != null) {
System.out.print(st);
wr.write(st.getBytes());
}
//Flush&close the writing to URL.
wr.flush();
wr.close();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String output;
StringBuffer response = new StringBuffer();
while ((output = in.readLine()) != null) {
response.append(output);
}
in.close();
// printing result from response
System.out.println("Response:-" + response.toString());
While HttpURLConnection can be used for this purpose, SOAPConnection was designed for situations where there is not a WSDL.
The code below is much simpler:
SOAPConnection conn = SOAPConnectionFactory.newInstance().createConnection();
SOAPMessage msg =
MessageFactory.newInstance()
.createMessage(null, Files.newInputStream(Paths.get("request.xml")));
SOAPMessage resp = conn.call(msg, "http://localhost:8080/ws");
resp.writeTo(System.out);
i am currently trying to use REST api provided by Paypal to create my own service using servlet. I manage to transfer the cURL code into HttpsURLConnection using java.
Here is my code:
JSONObject returnJson = new JSONObject();
PrintWriter out = response.getWriter();
JSONParser jparser = new JSONParser();
try{
String inputStr = request.getParameter("input");
System.out.println(inputStr);
JSONObject inputJson = (JSONObject) jparser.parse(inputStr);
String accessToken = (String) inputJson.get("access_token");
String invoiceId = (String) inputJson.get("invoiceId");
String url = "https://api.sandbox.paypal.com/v1/invoicing/invoices/"+invoiceId;
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
//add reuqest header
con.setRequestMethod("PUT");
con.setRequestProperty("Accept-Language", "text/html; charset=UTF-8");
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("Authorization", "Bearer "+accessToken);
//Tentatively, the input is hard coded, after integration, the input comes from http request.
//However, only merchant email in mandatory for invoice creation in sand box so far
//For details of invoice attributes please refer to this link--> https://developer.paypal.com/docs/api/#update-an-invoice
String urlJsonString = "{\"id\":\""+invoiceId+"\",\"status\":\"DRAFT\",\"merchant_info\":{\"email\":\"rui.song.2013-facilitator#sis.smu.edu.sg\",\"first_name\":\"Dennis\",\"last_name\":\"Doctor\",\"business_name\":\"MedicalProfessionals,LLC\",\"phone\":{\"country_code\":\"US\",\"national_number\":\"5032141716\"},\"address\":{\"line1\":\"1234MainSt.\",\"city\":\"Portland\",\"state\":\"LALA\",\"postal_code\":\"97217\",\"country_code\":\"US\"}},\"billing_info\":[{\"email\":\"sally-patient#example.com\"}],\"shipping_info\":{\"first_name\":\"Sally\",\"last_name\":\"Patient\",\"business_name\":\"Notapplicable\",\"address\":{\"line1\":\"1234BroadSt.\",\"city\":\"Portland\",\"state\":\"LALA\",\"postal_code\":\"97216\",\"country_code\":\"US\"}},\"items\":[{\"name\":\"Sutures\",\"quantity\":100,\"unit_price\":{\"currency\":\"USD\",\"value\":\"250\"}}],\"invoice_date\":\"2014-01-07PST\",\"payment_term\":{\"term_type\":\"NO_DUE_DATE\"},\"tax_calculated_after_discount\":false,\"tax_inclusive\":false,\"note\":\"MedicalInvoice16Jul,2013PST\",\"total_amount\":{\"currency\":\"USD\",\"value\":\"250\"}}";
System.out.println(urlJsonString);
con.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
wr.write(urlJsonString);
wr.close();
int responseCode = con.getResponseCode();
System.out.println("Response Code : " + responseCode);
out.print(responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer res= new StringBuffer();
while ((inputLine = in.readLine()) != null) {
res.append(inputLine);
}
in.close();
returnJson = (JSONObject) jparser.parse(res.toString());
System.out.println(returnJson);
}catch(Exception e){
e.printStackTrace();
returnJson.put("message", e);
}
out.print(returnJson);
I am testing the service on localhost, and i will manually pass in TWO parameters: "access_token" and "invoiceId" like this:
http://localhost:8080/Authentication/PaypalUpdateInvoiceServlet?input={"access_token":"A015Rv3XNo4fmFh4JC2sJiGjl1oEQ5w-B9azU.H6nlzMm1s","invoiceId":"INV2-9TRP-2S2R-OPBD-XK9T"}
These two pieces of info are obtained by me using the similar code i mentioned above.
I only modified codes in the entier HttpsURLConnection part to correspond with the cURL request and response sample provided in Paypal site. Link -->(https://developer.paypal.com/docs/api/#update-an-invoice)
Thus far, i successfully implement Create, Retrieve for invoice. I use the same way to make the servlet call with the specific parameters required and are able to get the expected response show on Paypal site.
BUT Now i am stuck with update invoice. When i make the servlet call.
i will receive:
500{"message":java.io.IOException: Server returned HTTP response code: 500 for URL: https://api.sandbox.paypal.com/v1/invoicing/invoices/IINV2-9TRP-2S2R-OPBD-XK9T}
Can anyone help me explain why i get this error and how shall i fix this?
I want to do an online xml request in java but the server responds with 401 error that means that there is an authentication that is need to access the server. I have the certfile.cer that i can use to do the authentication but i dont know how to load it in java.How can I achieve this in java? Here is part of my code.
StringBuilder answer = new StringBuilder();
URL url = new URL("www.myurl.com");
URLConnection conn = url.openConnection();
OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
writer.write(xml);
writer.flush();
String line;
while ((line = reader.readLine()) != null)
{
answer.append(line);
}
I'm sending data to an API from Java using POST.
What I'm trying to do is send a particular variable to the API in the POST request, and then use the value of it. But currently the value is empty. The API is definitely being called.
My Java looks like this:
String line;
StringBuffer jsonString = new StringBuffer();
try {
URL url = new URL("https://www.x.com/api.php");
String payload = "{\"variable1\":\"value1\",\"variable2\":\"value2\"}";
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Accept", "application/json");
connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
writer.write(payload);
writer.close();
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = br.readLine()) != null) {
jsonString.append(line);
}
br.close();
connection.disconnect();
}
This is based on: How to send Request payload to REST API in java?
Currently the value isn't being read correctly. Am I sending it correctly in Java? Do I have to do something to decode it?
The $_POST variable is not set for all HTTP POST requests, but only for specific types, e.g application/x-www-form-urlencoded.
Since you are posting a request containing JSON entity (application/json), you need to access it as follows.
$json = file_get_contents('php://input');
$entity= json_decode($json, TRUE);
You can try to use the following code instead of your String variable payload:
List<NameValuePair> payload = new ArrayList<NameValuePair>();
payload.add(new BasicNameValuePair("variable1", "value1");
That worked for me