I want create API by xtextservlet:
URI: /xtext-service/parser
Input in body of request: "Hello Xtext!"
API response: Abstract Syntax Tree
I use Ecslipse DSL Tool then overwrite to MyDslServlet.xtend file:
#WebServlet(name = 'XtextServices', urlPatterns = '/xtext-service/*')
class MyDslServlet extends XtextServlet {
DisposableRegistry disposableRegistry
Pattern _pattern2 = Pattern.compile("/parser")
#Inject
private ParseHelper<Model> parseHelper
.....
override doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
val url = req.getRequestURL().toString()
val _matcher = _pattern2.matcher(url)
if (_matcher.find()) {
resp.setContentType("text/x-json")
val myDslParser = new MyDslParser()
val iParseResult = myDslParser.doParse(text)
val gson = new Gson()
gson.toJson(iParseResult.toString(), resp.writer)
} else {
val service = getService(req)
if (!service.hasConflict && (service.hasSideEffects || service.hasTextInput)) {
// Send error 405 (method not allowed)
super.doGet(req, resp)
} else {
doService(service, resp)
}
}
}
}
But, always error:
[qtp1650967483-11] WARN org.eclipse.jetty.servlet.ServletHandler - /xtext-service/parser
java.lang.NullPointerException
at org.eclipse.xtext.parser.antlr.AbstractAntlrParser.parse(AbstractAntlrParser.java:84)
at org.eclipse.xtext.parser.antlr.AbstractAntlrParser.doParse(AbstractAntlrParser.java:62)
at org.eclipse.xtext.parser.antlr.AbstractAntlrParser.doParse(AbstractAntlrParser.java:70)
at org.xtext.example.mydsl.web.MyDslServlet.doGet(MyDslServlet.java:72)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at
Related
I have the following POST servlet that adds new node under certain resource with parameters(name and last nam) from the request:
#Component(
service = Servlet.class,
property = {
"sling.servlet.paths=/bin/createuser",
"sling.servlet.methods=" + HttpConstants.METHOD_POST
})
public class CreateNodeServlet extends SlingAllMethodsServlet {
/**
* Logger
*/
private static final Logger log = LoggerFactory.getLogger(CreateNodeServlet.class);
#Override
protected void doPost(final SlingHttpServletRequest req, final SlingHttpServletResponse resp) throws IOException {
log.info("Inside CreateNodeServlet");
ResourceResolver resourceResolver = req.getResourceResolver();
final Resource resource = resourceResolver.getResource("/content/test/us/en");
String name = req.getParameter("name");
String lastname = req.getParameter("lastname");
log.info("name :{}",name);
log.info("lastname :{}",lastname);
Node node = resource.adaptTo(Node.class);
try {
log.info("Node {}", node.getName() );
Node newNode = node.addNode(name+lastname, "nt:unstructured");
newNode.setProperty("name", name);
newNode.setProperty("lastname", lastname);
resourceResolver.commit();
} catch (RepositoryException e) {
e.printStackTrace();
} catch (PersistenceException e) {
e.printStackTrace();
}
resp.setStatus(200);
resp.getWriter().write("Simple Post Test");
}
}
I tried creating unit test for this I got this so far:
#ExtendWith(AemContextExtension.class)
class CreateNodeServletTest {
private final AemContext context = new AemContext();
private CreateNodeServlet createNodeServlet = new CreateNodeServlet();
#Test
void doPost() throws IOException, JSONException {
context.currentPage(context.pageManager().getPage("/bin/createuser"));
context.currentResource(context.resourceResolver().getResource("/bin/createuser"));
context.requestPathInfo().setResourcePath("/bin/createuser");
MockSlingHttpServletRequest request = context.request();
MockSlingHttpServletResponse response = context.response();
createNodeServlet.doPost(request, response);
JSONArray output = new JSONArray(context.response().getOutputAsString());
assertEquals("Simple Post Test", output);
}
}
however this is not working I am getting null pointer on this line
Node node = resource.adaptTo(Node.class);
can some one help what I am missing and some tips will be of great help as I am new to AEM, and there is not much resources about unit testing sling servlets ?
I think you need to register JCR_MOCK as resource resolver type
new AemContext(ResourceResolverType.JCR_MOCK);
So I'm tying to develop a very simple TeamCity Plugin. The Plugin is just suppose to take user input and display it. My code seems to work on my local Tomcat server but when i try to integrate it into TeamCity via the Basecontroller class from jetbrains there seems to be no output. This is my code
public class AppServer extends BaseController{
private PluginDescriptor myDescriptor;
public AppServer (WebControllerManager manager, PluginDescriptor descriptor) {
manager.registerController("/demoPlugin.html",this);
myDescriptor=descriptor;
}
public void doGet(HttpServletRequest request, HttpServletResponse responseone)throws IOException, ServletException {
try {
responseone.setContentType("text/html; charset=UTF-8");
PrintWriter out = responseone.getWriter();
try {
out.println("<!DOCTYPE html>");
out.println("<html><head>");
out.println("<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>");
out.println("<title>Echo Servlet</title></head>");
out.println("<body><h2>You have enter</h2>");
String requirement = request.getParameter("requirement");
if (requirement == null || (requirement = htmlFilter(requirement.trim())).length() == 0) {
out.println("<p>Agent Requirement: Not specified</p>");
}
else {
out.println("<p>Agent Requirement: " + requirement + "</p>");
}
out.println("<a href='form_input.html'>BACK</a>");
out.println("</body></html>");
}
finally{
out.close();
}
}
finally{
return;
}
}
public void doPost(HttpServletRequest request, HttpServletResponse responseone)
throws IOException, ServletException {
doGet(request, responseone);
}
private static String htmlFilter(String message) {
if (message == null) return null;
int len = message.length();
StringBuffer result = new StringBuffer(len + 20);
char aChar;
for (int i = 0; i < len; ++i) {
aChar = message.charAt(i);
switch (aChar) {
case '<': result.append("<"); break;
case '>': result.append(">"); break;
case '&': result.append("&"); break;
case '"': result.append("""); break;
default: result.append(aChar);
}
}
return (result.toString());
}
protected ModelAndView doHandle(HttpServletRequest httpServletRequest,
HttpServletResponse httpServletResponse) throws Exception {
return new ModelAndView(myDescriptor.getPluginResourcesPath("Hello.jsp"));
}
}
I honestly don't know what I'm doing and I cannot seem to find any good tutorials regarding Basecontroller class from jetbrains. Please help.
I want to read a list of url to the same site which support http 1.1 keep-live.
I try to use netty to do this and it works.
but when i get the response,i can not identify it is for which url.
how can i get the request url from method messageReceived below:
public static void main(String[] args) throws InterruptedException, URISyntaxException {
String host = "localhost";
int port = 8080;
String[] paths = new String[]{"1.html", "2.html", "3.html"};
EventLoopGroup group = new NioEventLoopGroup();
Bootstrap b = new Bootstrap();
b.group(group)
.channel(NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>() {
#Override
protected void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline p = ch.pipeline();
p.addLast(new HttpClientCodec());
p.addLast(new HttpContentDecompressor());
p.addLast(new SimpleChannelInboundHandler<HttpObject>() {
#Override
protected void messageReceived(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
if (msg instanceof HttpContent) {
HttpContent content = (HttpContent) msg;
System.out.println("response from url ?:" + content.content().toString());
}
}
});
}
});
Channel ch = b.connect(host, port).sync().channel();
for (String path : paths) {
HttpRequest request = new DefaultFullHttpRequest(
HttpVersion.HTTP_1_1, HttpMethod.GET, path);
request.headers().set(HttpHeaderNames.HOST, host);
request.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE);
request.headers().set(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP);
ch.writeAndFlush(request);
}
Try this:
p.addLast(new SimpleChannelInboundHandler<Object>() {
#Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
if (msg instanceof HttpRequest) {
System.out.println("I'm HttpRequest");
FullHttpRequest req = (FullHttpRequest) msg;
if (HttpHeaders.is100ContinueExpected(req)) {
ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE));
}
System.out.println("response from url ?:" + req.getUri());
ByteBuf content = req.content();
}
}
});
Don't know what version of netty are you using. If 5.0+, rename channelRead to messageReceived.
I have a spring-boot app acting as a image server. I POST an image to be persisted to mongodb. I then retrieve it, resize and return it.
Here is the project configuration:
#Configuration
public class AllResources extends WebMvcConfigurerAdapter {
#Override
public void configurePathMatch(PathMatchConfigurer matcher) {
matcher.setUseRegisteredSuffixPatternMatch(true);
}
}
And here is the endpoint:
#RequestMapping(value = "images/{filename}", method = RequestMethod.GET)
#ResponseBody
public ResponseEntity<BufferedImage> getSizedImage(#PathVariable String filename, #RequestParam int width, #RequestParam int height) throws Exception {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.IMAGE_PNG);
GridFSDBFile savedFile = mongoFileService.getStore( filename );
if ( savedFile != null ) {
try {
BufferedImage image = ImageIO.read( savedFile.getInputStream() );
image = resize( image, Method.SPEED, width, height, Scalr.OP_ANTIALIAS );
LOGGER.info("Returning Filename " + savedFile.getFilename() + " sized to " + width + " X " + height);
return new ResponseEntity<BufferedImage>(image, headers, HttpStatus.OK);
} catch ( Exception ex ) {
ex.printStackTrace();
LOGGER.error( "Error sizing file " + filename + ": " + ex.getMessage() );
return new ResponseEntity<BufferedImage>(null, headers, HttpStatus.INTERNAL_SERVER_ERROR);
}
} else {
LOGGER.error( "Could not find requested file " + filename );
return new ResponseEntity<BufferedImage>(null, headers, HttpStatus.NOT_FOUND);
}
}
The image is retrieved and resized (I can actually preview when debugging in IntelliJ). But when it is returned, I get the following error:
Controller [org.springframework.boot.autoconfigure.web.BasicErrorController]
Method [public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)]
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:195)
And I see this in the logs:
Method [error] returned [<406 Not Acceptable,{timestamp=Sat Aug 22 11:05:59 MDT 2015, status=406, error=Not Acceptable, exception=org.springframework.web.HttpMediaTypeNotAcceptableException, message=Could not find acceptable representation, path=/images/1440263145562_profile_04132015.PNG},{}>]
2015-08-22 11:05:59.711 DEBUG 2478 --- [0.1-3000-exec-3] o.s.w.s.m.m.a.HttpEntityMethodProcessor : Written [{timestamp=Sat Aug 22 11:05:59 MDT 2015, status=406, error=Not Acceptable, exception=org.springframework.web.HttpMediaTypeNotAcceptableException, message=Could not find acceptable representation, path=/images/1440263145562_profile_04132015.PNG}] as "application/json;charset=UTF-8" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#5bf1ba3a]
2015-08-22 11:05:59.711 DEBUG 2478 --- [0.1-3000-exec-3] o.s.web.servlet.DispatcherServlet : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
I have tried with & without the #ResponseBody and it doesn't appear to make a difference either. I have the produces and content type set correctly (I think).
I added these converters (although I thought SpringBoot provided these), but to no avail:
#Configuration
public class AllResources extends WebMvcConfigurerAdapter {
#Override
public void configurePathMatch(PathMatchConfigurer matcher) {
matcher.setUseRegisteredSuffixPatternMatch(true);
}
#Bean
public ByteArrayHttpMessageConverter byteArrayHttpMessageConverter(){
ByteArrayHttpMessageConverter bam = new ByteArrayHttpMessageConverter();
List<org.springframework.http.MediaType> mediaTypes = new LinkedList<MediaType>();
mediaTypes.add(org.springframework.http.MediaType.APPLICATION_JSON);
mediaTypes.add(org.springframework.http.MediaType.IMAGE_JPEG);
mediaTypes.add(org.springframework.http.MediaType.IMAGE_PNG);
mediaTypes.add(org.springframework.http.MediaType.IMAGE_GIF);
mediaTypes.add(org.springframework.http.MediaType.TEXT_PLAIN);
bam.setSupportedMediaTypes(mediaTypes);
return bam;
}
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
MappingJackson2HttpMessageConverter mapper = new MappingJackson2HttpMessageConverter();
converters.add(mapper);
converters.add(byteArrayHttpMessageConverter());
super.configureMessageConverters(converters);
}
}
I hope someone can see what is causing this issue.
Try this piece of code
#RequestMapping("/sparklr/photos/{id}")
public ResponseEntity<BufferedImage> photo(#PathVariable String id) throws Exception {
InputStream photo = sparklrService.loadSparklrPhoto(id);
if (photo == null) {
throw new UnavailableException("The requested photo does not exist");
}
BufferedImage body;
MediaType contentType = MediaType.IMAGE_JPEG;
Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByMIMEType(contentType.toString());
if (imageReaders.hasNext()) {
ImageReader imageReader = imageReaders.next();
ImageReadParam irp = imageReader.getDefaultReadParam();
imageReader.setInput(new MemoryCacheImageInputStream(photo), true);
body = imageReader.read(0, irp);
} else {
throw new HttpMessageNotReadableException("Could not find javax.imageio.ImageReader for Content-Type ["
+ contentType + "]");
}
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.IMAGE_JPEG);
return new ResponseEntity<BufferedImage>(body, headers, HttpStatus.OK);
}
EDIT:
We have to configure MessageConverter
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(new BufferedImageHttpMessageConverter());
}
Here I have Content Negotiator like this
#Bean
public ContentNegotiatingViewResolver contentViewResolver() throws Exception {
ContentNegotiatingViewResolver contentViewResolver = new ContentNegotiatingViewResolver();
ContentNegotiationManagerFactoryBean contentNegotiationManager = new ContentNegotiationManagerFactoryBean();
contentNegotiationManager.addMediaType("json", MediaType.APPLICATION_JSON);
contentViewResolver.setContentNegotiationManager(contentNegotiationManager.getObject());
contentViewResolver.setDefaultViews(Arrays.<View> asList(new MappingJackson2JsonView()));
return contentViewResolver;
}
I think the message inside your logs can clear your doubts. Have a close look at your logs and comment me again
I think the problem is that none of the registered message converters knows how to write a BufferedImage to the response in the format dictated by the accept header. Try registering your own message converter that knows how to write out a BufferedImage in the requested format.
I'm trying to send data from a midlet to a servlet and recieve back a response from the servlet but I don't get any value in response. I've tried to print it on command window and it seems to be null yet I expect only two values "ok" or "error". Please help me check the code and let me know what I should do to get the response right on the midlet. My code is below:
import javax.microedition.midlet.*;//midlet class package import
import javax.microedition.lcdui.*;//package for ui and commands
import javax.microedition.io.*;//
import java.io.*;
/**
* #author k'owino
*/
//Defining the midlet class
public class MvsMidlet extends MIDlet implements CommandListener {
private boolean midletPaused = false;//variable for paused state of midlet
//defining variables
private Display display;// Reference to Display object
private Form welForm;
private Form vCode;//vote code
private StringItem welStr;
private TextField phoneField;
private StringItem phoneError;
private Command quitCmd;
private Command contCmd;
//constructor of the midlet
public MvsMidlet() {
display = Display.getDisplay(this);//creating the display object
welForm = new Form("THE MVS");//instantiating welForm object
welStr = new StringItem("", "Welcome to the MVS, Busitema's mobile voter."
+ "Please enter the your phone number below");//instantiating welStr string item
phoneError = new StringItem("", "");//intantiating phone error string item
phoneField = new TextField("Phone number e.g 0789834141", "", 10, 3);//phone number field object
quitCmd = new Command("Quit", Command.EXIT, 0);//creating quit command object
contCmd = new Command("Continue", Command.OK, 0);//creating continue command object
welForm.append(welStr);//adding welcome string item to form
welForm.append(phoneField);//adding phone field to form
welForm.append(phoneError);//adding phone error string item to form
welForm.addCommand(contCmd);//adding continue command
welForm.addCommand(quitCmd);//adding quit command
welForm.setCommandListener(this);
display.setCurrent(welForm);
}
//start application method definition
public void startApp() {
}
//pause application method definition
public void pauseApp() {
}
//destroy application method definition
public void destroyApp(boolean unconditional) {
}
//Command action method definition
public void commandAction(Command c, Displayable d) {
if (d == welForm) {
if (c == quitCmd) {
exitMidlet();//call to exit midlet
} else {//if the command is contCmd
//place a waiting activity indicator
System.out.println("ken de man");
Thread t = new Thread() {
public void run() {
try {
//method to connect to server
sendPhone();
} catch (Exception e) {
}//end of catch
}//end of ru()
};//end of thread
t.start();//starting the thread
}//end of else
}//end of first if
}//end of command action
//defining method to exit midlet
public void exitMidlet() {
display.setCurrent(null);
destroyApp(true);
notifyDestroyed();
}//end of exitMidlet()
//defining sendPhone method
public void sendPhone() throws IOException {
System.out.println("ken de man");//check
HttpConnection http = null;//HttpConnection variable
OutputStream oStrm = null;//OutputStream variable
InputStream iStrm = null;//InputStream variable
String url = "http://localhost:8084/MvsWeb/CheckPhone";//server url
try {
http = (HttpConnection) Connector.open(url);//opening connection
System.out.println("connection made");//checking code
oStrm = http.openOutputStream();//opening output stream
http.setRequestMethod(HttpConnection.POST);//setting request type
http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//setting content type
byte data[] = ("phone=" + phoneField.getString()).getBytes();
oStrm.write(data);
iStrm = http.openInputStream();//openning input stream
if (http.getResponseCode() == HttpConnection.HTTP_OK) {
int length = (int) http.getLength();
String str;
if (length != -1) {
byte servletData[] = new byte[length];
iStrm.read(servletData);
str = new String(servletData);
} else // Length not available...
{
ByteArrayOutputStream bStrm = new ByteArrayOutputStream();
int ch;
while ((ch = iStrm.read()) != -1) {
bStrm.write(ch);
}
str = new String(bStrm.toByteArray());
bStrm.close();
}
System.out.println("de man");
System.out.println(str);
if (str.equals("ok")) {
//change to vcode form
} else {
//add error message to phone_error stingItem
}
}
} catch (Exception e) {
}
}
}//end of class definition
//servlet
import java.io.*;//package for io classes
import javax.servlet.ServletException;//package for servlet exception classes
import javax.servlet.http.*;
import java.sql.*;//package for sql classes
/**
*
* #author k'owino
*/
public class CheckPhone extends HttpServlet {
#Override
protected void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
}
#Override
protected void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
//declaring variables
PrintWriter pw;//PrintWriter object
String pnum;//phone parameter sent from client
Connection con = null;//connection variable
String dbDriver = "com.jdbc.mysql.Driver";//the database driver
String dbUrl = "jdbc:mysql://localhost/mvs_db";//the database url
String dbUser = "root";//database user
String dbPwd = "";//database password
PreparedStatement pstmt = null;//Prepared statement variable
String query = "select * from student where stud_phone = ?;";
ResultSet rs = null;//resultset variable
String dbPhone=null;//phone from database
//getting the "phone" parameter sent from client
pnum = req.getParameter("phone");//getting the "phone" parameter sent from client
System.out.println(pnum);
//setting the content type of the response
res.setContentType("text/html");
//creating a PrintWriter object
pw = res.getWriter();
pw.println("ken");
try{//trying to load the database driver and establish a connection to the database
Class.forName(dbDriver).newInstance();//loading the database driver
con = DriverManager.getConnection(dbUrl,dbUser,dbPwd);//establishing a connection to the database
System.out.println("connection established");
}
catch(Exception e){
}
//trying to query the database
try{
pstmt = con.prepareStatement(query);//preparing a statement
pstmt.setString(1, pnum);//setting the input parameter
rs = pstmt.executeQuery();//executing the query assigning to the resultset object
//extracring data from the resultset
while(rs.next()){
dbPhone = rs.getString("stud_phone");//getting the phone number from database
}//end of while
if(pnum.equals(dbPhone)){
pw.print("ok");
pw.close();
}
else{
pw.print("error");
pw.close();
}
}
catch(Exception e){
}
}
#Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}