Reputation: 255

angularjs + spring mvc + json post request

I've been doing some research on the web regarding my problem, and I feel that my code reflects what's written in most of the examples - and yet, it still doesn't work. Thus my question.

Long story short, I want to send POST request to add new item to some "backend". For REST API I use Spring MVC, for sending the request I use $http from AngularJS

That's how I invoke the POST request

    $scope.testAddItem = function(){
    $http({
        'url' : 'addNewItem',
        'method' : 'POST',
        'headers': {'Content-Type' : 'application/json'},
        'data' : $scope.newItem
    }).success(function(data){
        $scope.marketForm.texts.push({'text' : data.text});
    })
}

Which maps to the proper URL. Problem is that I get the following response

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
<title>Error 400 BAD_REQUEST</title>
</head>
<body><h2>HTTP ERROR 400</h2>
<p>Problem accessing /poll/addNewItem/. Reason:
<pre>    BAD_REQUEST</pre></p><hr /><i><small>Powered by Jetty://</small></i><br/>

I get this error either when I click the button on the website, and when I'm testing it via some REST Client.

Dependencies I've included in my pom.xml

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.2.3</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.2.3</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.2.3</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.13</version>
    </dependency>

One note - sending other request via GET works.

My Controller class

@Controller
@RequestMapping(value = "/")
public class PollController {

@RequestMapping(method = RequestMethod.GET)
public String mainPage(){
    return "poll";
}

@RequestMapping(value = "/getNewElement")
public @ResponseBody
List<PollItem> getNewElement(){

    List<PollItem> listOfItems = new ArrayList<PollItem>(2);

    listOfItems.add(new PollItem("test 1"));
    listOfItems.add(new PollItem("test 2"));

    return listOfItems;
}

@RequestMapping(value = "/addNewItem", method = RequestMethod.POST, consumes =    MediaType.APPLICATION_JSON_VALUE)
public @ResponseBody PollItem addNewElement(@RequestBody PollItem pollItem){
    pollItem.setId(2); // I know it makes no logical sense, but it's just for testing.
    return pollItem;
}

}

Any clues ?

EDIT

After adding debug mode it seems that it's some JSON parsing problem

Method [public com.poll.model.PollItem com.poll.controller.PollController.addNewElement(com.poll.model.PollItem)]

    org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unexpected character ('a' (code 97)): expected a valid value (number, String, arr
    ay, object, 'true', 'false' or 'null')
    at [Source: HttpInputOverHTTP@5ce15706; line: 1, column: 2]; nested exception is org.codehaus.jackson.JsonParseException: Unexpected character ('a' (code 97)): expected
    a valid value (number, String, array, object, 'true', 'false' or 'null')
    at [Source: HttpInputOverHTTP@5ce15706; line: 1, column: 2]
    at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:187)
    at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.read(MappingJacksonHttpMessageConverter.java:179)
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodAr
    gumentResolver.java:138)
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:183)

    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:98)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:738)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:551)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:568)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1111)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:478)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1045)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:199)
    at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:462)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:279)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:232)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:534)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:607)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:536)
    at java.lang.Thread.run(Thread.java:724)
    Caused by: org.codehaus.jackson.JsonParseException: Unexpected character ('a' (code 97)): expected a valid value (number, String, array, object, 'true', 'false' or 'null'
    )
    at [Source: HttpInputOverHTTP@5ce15706; line: 1, column: 2]
    at org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1433)
    at org.codehaus.jackson.impl.JsonParserMinimalBase._reportError(JsonParserMinimalBase.java:521)
    at org.codehaus.jackson.impl.JsonParserMinimalBase._reportUnexpectedChar(JsonParserMinimalBase.java:442)
    at org.codehaus.jackson.impl.Utf8StreamParser._handleUnexpectedValue(Utf8StreamParser.java:2090)
    at org.codehaus.jackson.impl.Utf8StreamParser._nextTokenNotInObject(Utf8StreamParser.java:606)
    at org.codehaus.jackson.impl.Utf8StreamParser.nextToken(Utf8StreamParser.java:492)
    at org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2770)
    at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2718)
    at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1923)
    at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:184)
    ... 38 more

EDIT2

It seems that it works, problem is that it supports only " (double quotes) where I want to use single-quotes. Is there any reason why I should double quotes always when doing JSON?

And what I should do change default behaviour of JSON mapper?

Upvotes: 6

Answers (3)

John Doe

Reputation: 31

That's true if your JSON is not mapped correctly with server side object then it will throw exception. I found very nice simple example here working exactly what you are looking for:

AngularJS Post Spring MVC JSON Example

AngularJS Form Post Spring MVC JSON

Upvotes: 3

amerykanin

Reputation: 255

Ok, to answer the question - issue was that I used badly formatted JSON. I should be using double-quotes instead of single quotes (which is basically follwoing JSON standard. I'm new to this and I was a little bit confused, because a lot of websites uses single quotes for their examples - like for instance google charts ).

{"id":10,"text":"smth smth"}

is good

{'id':10,'text':'smth smth'}

is bad:)

Upvotes: 3

Sharif Ahmed

Reputation: 26

You may be missing the default constructor in your PollItem domain.

public class PollItem {
     public PollItem () {
     }
     //your rest of the codes
}

Add this and your code will work just fine.

You already have a constructor defined in PollItem, which is making it the default constructor. Therfore adding the dummy constructor will solve your problem

Upvotes: 0

angularjs + spring mvc + json post request

Answers (3)

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