Spring 4 RestController JSON: characteristics are not acceptable as per "accept" request headers
I am using spring 4.1.1.RELEASE and have included: jackson-core-asl 1.9.13 and jackson-mapper-asl 1.9.13 in the pom to create a simple application with RestController.
Here is the repo: https://github.com/robikshrestha/samplespringrest.git
Here's a failed war: https://github.com/robikshrestha/samplespringrest/tree/master/failingWar
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany</groupId>
<artifactId>SampleContactApp</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>SampleContactApp</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>4.1.1.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>7.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Here is my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<servlet>
<servlet-name>sample</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>sample</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
and my sample-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.sample" />
<mvc:annotation-driven />
</beans>
The controller class is simple too. And the Sample class has public getters and setters.
@RestController
@RequestMapping("/")
public class SampleController {
@RequestMapping("/getSample")
public Sample getSample() {
Sample s = new Sample();
s.setId(1);
s.setName("abc");
return s;
}
}
When I send a request through the browser, I receive
The resource specified in this request is capable of generating responses with characteristics that are unacceptable for the "accept" headers request.
I tried to send request with other REST tools using header like
Accept: Applications / JSON
and even tried $ .getJSON (), $ .ajax () etc. but the same error still occurs. I've tried all the other related threads on StackOverflow but the problem still persists.
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The trick with this error is that it can be very unfortunate. In a situation similar to the OP, where you see an error caused by the browser GET request (s accept header */*
) and the correct configuration (in the case of OPs, the default minimal working configuration), the reason is most likely an exception while converting to view.
Here even if the request does not offer a view (Nor parameter, neither path nor header accept), but the answer complains about
the resource identified by this request is capable of generating responses with characteristics inappropriate according to the request "accept" headers
The reasons may be:
- Missing dependencies
- Bean return error (e.g. missing getters or the like).
from Spring Framework 4.1 , minimum Jackson version should be 2.1 (2.3 recommended) , replace your Jackson dependencies with this one
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.1.2</version>
</dependency>
One thing that prevents debugging in this case is that in tomcat 7.0.5x versions this dependency is available in libs, unlike the previous version. So your code works fine in this tomcat version just like
Spring MVC Version 3.x should still use
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
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