Spring boot & Jquery 415（不支持的媒体类型）

Question

我尝试在安全上下文中对 Spring Rest Web 服务 API 进行 ajax 跨域发布调用。 从 Jquery 我无法设置 contentType 属性 cos 然后我遇到了安全上下文的问题。 但是如果没有 spring 的 contentType，我会收到以下响应：415 (Unsupported Media Type)

弹簧控制器：

@RequestMapping(value = "/all", method = RequestMethod.POST)
    @PreAuthorize("hasAnyAuthority('PROF1','SUDO')")

jquery：

function getAllUsers(){
    var obj = {"limit":10,"page":0};
     $.ajax({
         url:"https://webServerSite/myService/api/v1/user/all",
         dataType: 'json',
         xhrFields: {
             withCredentials: true
          },
         crossDomain: true,
         data:obj,
         type: "post",
         success:function(json){
             var str = JSON.stringify(json);
             console.log(str);
         },
         error:function(xhr, status, error) {
              alert(xhr.responseText);
            }    
    });
}

有办法在 Spring 上禁用 contentType 检查吗？ 我所有的数据都是 json，我希望将其设置为默认值，以避免内容类型标头检查。 我尝试定义一个自定义消息转换器并使用以下代码不起作用：

@Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {

        //set path extension to true
        configurer.favorPathExtension(true).
        //set favor parameter to false
        favorParameter(false).
        //ignore the accept headers
        ignoreAcceptHeader(true).
        //dont use Java Activation Framework since we are manually specifying the mediatypes required below
        useJaf(false).
        defaultContentType(MediaType.APPLICATION_JSON).
        mediaType("xml", MediaType.APPLICATION_XML).
        mediaType("json", MediaType.APPLICATION_JSON);
      }

谢谢

Answer 1

您可以使用带有consumes 字段的@RequestMapping 注释来指定您的控制器方法接受的内容类型。对于您的用例，您可以考虑接受以下所有内容类型：

import org.springframework.http.MediaType;

@RequestMapping(value = "/all", method = RequestMethod.POST, consumes = {MediaType.ALL_VALUE})

更新：

您不应该禁用标头检查，否则服务器不知道传入的内容类型以及如何正确解析它。

鉴于您的堆栈跟踪，我认为错误来自不同的来源。您尝试将传入的 application/x-www-form-urlencoded; charset=UTF-8 解析为 @RequestBody，这在 Spring 中是不可能的。

此问题已在其他地方得到解答：Http Post request with content type application/x-www-form-urlencoded not working in Spring

Answer 2

我解决了在我的 Spring Boot 应用程序中添加以下转换器的问题：

import java.io.IOException;
import java.io.PushbackInputStream;
import java.lang.reflect.Type;

import org.springframework.http.HttpInputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConversionException;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.http.converter.json.MappingJacksonInputMessage;
import org.springframework.lang.Nullable;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.exc.InvalidDefinitionException;

public class CustomMappingJackson2HttpMessageConverter  extends AbstractJackson2HttpMessageConverter {

    @Nullable
    private String jsonPrefix;


    public CustomMappingJackson2HttpMessageConverter() {
        this(Jackson2ObjectMapperBuilder.json().build());
    }


    public CustomMappingJackson2HttpMessageConverter(ObjectMapper objectMapper) {
        super(objectMapper, MediaType.APPLICATION_FORM_URLENCODED,MediaType.TEXT_PLAIN,MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
    }


    public void setJsonPrefix(String jsonPrefix) {
        this.jsonPrefix = jsonPrefix;
    }

    public void setPrefixJson(boolean prefixJson) {
        this.jsonPrefix = (prefixJson ? ")]}', " : null);
    }


    @Override
    protected void writePrefix(JsonGenerator generator, Object object) throws IOException {
        if (this.jsonPrefix != null) {
            generator.writeRaw(this.jsonPrefix);
        }
    }
    
    @Override
    protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage)
            throws IOException, HttpMessageNotReadableException {

        JavaType javaType = getJavaType(clazz, null);
        return readJavaType(javaType, inputMessage);
    }

    @Override
    public Object read(Type type, @Nullable Class<?> contextClass, HttpInputMessage inputMessage)
            throws IOException, HttpMessageNotReadableException {

        JavaType javaType = getJavaType(type, contextClass);
        return readJavaType(javaType, inputMessage);
    }

    private Object readJavaType(JavaType javaType, HttpInputMessage inputMessage) throws IOException {
        try {
            if (inputMessage instanceof MappingJacksonInputMessage) {
                Class<?> deserializationView = ((MappingJacksonInputMessage) inputMessage).getDeserializationView();
                if (deserializationView != null) {
                    return this.objectMapper.readerWithView(deserializationView).forType(javaType).
                            readValue(inputMessage.getBody());
                }
            }
            PushbackInputStream pIs = new PushbackInputStream (inputMessage.getBody());
            return this.objectMapper.readValue(pIs, javaType);
        }
        catch (InvalidDefinitionException ex) {
            throw new HttpMessageConversionException("Type definition error: " + ex.getType(), ex);
        }
        catch (JsonProcessingException ex) {
            throw new HttpMessageNotReadableException("JSON parse error: " + ex.getOriginalMessage(), ex, inputMessage);
        }
    }
}

在我的应用程序中：

@Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(customConverters());
    }

    public HttpMessageConverter customConverters() {
        HttpMessageConverter<Object> converter = new CustomMappingJackson2HttpMessageConverter(new ObjectMapper());
        return converter;
    }

通过站点管理器进行跨域请求是必需的