JSON 的 Http 415 Unsupported Media type 错误

Question

I am calling a REST service with a JSON request and it responds with a HTTP 415 "Unsupported Media Type" error.

The request content type is set to ("Content-Type", "application/json; charset=utf8") .

It works fine if I don't include a JSON object in the request. I am using the google-gson-2.2.4 library for JSON.

I tried using a couple of different libraries but it made no difference.

Can anybody please help me to resolve this?

Here is my code:

public static void main(String[] args) throws Exception
{

    JsonObject requestJson = new JsonObject();
    String url = "xxx";

    //method call for generating json

    requestJson = generateJSON();
    URL myurl = new URL(url);
    HttpURLConnection con = (HttpURLConnection)myurl.openConnection();
    con.setDoOutput(true);
    con.setDoInput(true);

    con.setRequestProperty("Content-Type", "application/json; charset=utf8");
    con.setRequestProperty("Accept", "application/json");
    con.setRequestProperty("Method", "POST");
    OutputStream os = con.getOutputStream();
    os.write(requestJson.toString().getBytes("UTF-8"));
    os.close();


    StringBuilder sb = new StringBuilder();  
    int HttpResult =con.getResponseCode();
    if(HttpResult ==HttpURLConnection.HTTP_OK){
    BufferedReader br = new BufferedReader(new   InputStreamReader(con.getInputStream(),"utf-8"));  

        String line = null;
        while ((line = br.readLine()) != null) {  
        sb.append(line + "\n");  
        }
         br.close(); 
         System.out.println(""+sb.toString());  

    }else{
        System.out.println(con.getResponseCode());
        System.out.println(con.getResponseMessage());  
    }  

}
public static JsonObject generateJSON () throws MalformedURLException

{
   String s = "http://www.example.com";
        s.replaceAll("/", "\\/");
    JsonObject reqparam=new JsonObject();
    reqparam.addProperty("type", "arl");
    reqparam.addProperty("action", "remove");
    reqparam.addProperty("domain", "staging");
    reqparam.addProperty("objects", s);
    return reqparam;

}
}

The value of requestJson.toString() is :

{"type":"arl","action":"remove","domain":"staging","objects":"http://www.example.com"}

Answer 1

不确定原因，但从con.setRequestProperty("Content-Type", "application/json; charset=utf8")删除行charset=utf8解决了该问题。

Answer 2

添加Content-Type : application/json和Accept : application/json

Answer 3

如果您正在制作 jquery ajax 请求，请不要忘记添加

contentType:'application/json'

Answer 4

This is because charset=utf8 should be without a space after application/json . That will work fine. Use it like application/json;charset=utf-8

Answer 5

If you are using AJAX jQuery Request this is a must to apply. If not it will throw you 415 Error.

dataType: "json",
contentType:'application/json'

Answer 6

If you get this in React RSAA middleware or similar, Add the headers:

  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify(model),

Answer 7

HttpVerb 需要将其标头作为键值对字典

headers = {'Content-Type': 'application/json', 'charset': 'utf-8'}

Answer 8

Add the HTTP header manager and add in it your API's header names and values. eg Content-type, Accept, etc. That will resolve your issue.

Answer 9

Some times Charset Metada breaks the json while sending in the request. Better, not use charset=utf8 in the request type.

Answer 10

I fixed this by updating the Request class that my Controller receives.

I removed the following class level annotation from my Request class on my server side. After that my client didn't get 415 error.

import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement

Answer 11

The 415 (Unsupported Media Type) status code indicates that the origin server is refusing to service the request because the payload is in a format not supported by this method on the target resource. The format problem might be due to the request's indicated Content-Type or Content-Encoding, or as a result of inspecting the data directly. DOC

Answer 12

I was sending "delete" rest request and it failed with 415. I saw what content-type my server uses to hit the api. In my case, It was "application/json" instead of "application/json; charset=utf8".

So ask from your api developer And in the meantime try sending request with content-type= "application/json" only.

Answer 13

I had the same issue. My problem was complicated object for serialization. One attribute of my object was Map<Object1, List<Object2>> . I changed this attribute like List<Object3> where Object3 contains Object1 and Object2 and everything works fine.

Answer 14

我知道这对于帮助 OP 解决他的问题为时已晚，但对于我们所有刚刚遇到此问题的人来说，我已经通过删除带有我的类的参数的构造函数来解决这个问题，该参数用于保存 json 数据。

Answer 15

Add MappingJackson2HttpMessageConverter manually in configuration solved the problem for me :

@EnableWebMvc
@Configuration
@ComponentScan
public class RestConfiguration extends WebMvcConfigurerAdapter {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> messageConverters) {
        messageConverters.add(new MappingJackson2HttpMessageConverter());
        super.configureMessageConverters(messageConverters);
    }
}

Answer 16

The reason can be not adding "annotation-driven" in your dispatcher servlet xml file. and also it may be due to not adding as application/json in the headers

Answer 17

I have also faced this issue when working REST service with a JSON request and it responds with a HTTP 415 "Unsupported Media Type" error. These lines of codes will help you to resolve the issue.

headers: { "Content-Type": "application/json", "accept": " / " },

After that, you should write code to encode the JSON body. For an example,

body: jsonEncode({"username": username, "password": password})

Answer 18

Incase if you are giving a post request through Postman then make sure you have choosed these 2 options

1. JSON should be choosed

2. Content-Type - application/json