记feign调用第三方接口时header是multipart/form-data

分手后的思念是犯贱 2024-02-18 10:06 12阅读 0赞

## 1.请求第三方接口，用feign请求 ##

请求第三方接口，用feign请求，header不通，feign的写法不同

调用时报错Could not write request: no suitable HttpMessageConverter found for request type \[com.ccreate.cnpc.mall.dto.zm.ZMPageQueryDTO\] and content type \[multipart/form-data;charset=UTF-8\]

### 1. 对方接口是multipart/form-data接收格式 ###

package com.mall.controller.feign;
    
    import com.mall.controller.feign.fallback.ZMGoodFeignFallback;
    import com.mall.dto.zm.ZMPageQueryDTO;
    import com.mall.dto.zm.ZMSpuInfoDTO;
    import com.ccreate.common.response.R;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.http.MediaType;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestBody;
    
    /**
     * 商品
     */
    @FeignClient(url = "${zm.host}", name = "cnpc-ZMGood", fallbackFactory = ZMGoodFeignFallback.class)
    public interface ZMGoodFeign {
    
        /**
         * 商品列表查询
         *
         */
        @PostMapping(value = "/api/agent/goodsList", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
        R<ZMSpuInfoDTO> getSpuList(@RequestBody ZMPageQueryDTO page);
    
    }

对方返回的格式

{
        code:200,
        message:"ok",
        data:{
            list:[
                {
                    id:"10001661",
                    name:"migo保温壶家用保温水壶大容量热水瓶304不锈钢热水壶保温瓶暖",
                    sellingPoint:"304不锈钢 坚韧把手 24小时长效保温",
                    skuType:"2",
                    brandId:"100094",
                    brandName:"miGo",
                    categoryId:"100278",
                    categoryIds:"100235,100273,100278",
                    coverImage:"http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717090891958.jpg",
                    marketPrice:"189.00",
                    photos:[
                        "http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717090891958.jpg",
                        "http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717091363771.jpg",
                    ],
                    detailImages:[
                        "http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717110984525.jpg",
                        "http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717111337957.jpg",
                    ],
                    detailContent:"",
                    deliverTime:"TIME24",
                    servicePromise:[
                        "FREE_DELIVERY",
                        "PROMISE10"
                    ],
                    afterSaleRule:"",
                    auditStatus : "1",
                    agentRejectReason : "",
                    skuList:[
                        {
                            "skuId":"80005071",
                            "code":"S20003VH.02",
                            "marketPrice":"199.00",
                            "agentPrice":"200.00"
                            "weight":"0.90",
                            "specList":[
                                {
                                    "name":"容量",
                                    "value":"2L",
                                    "image":"http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717160413832.jpg"
                                },
                                {
                                    "name":"颜色",
                                    "value":"馥芮白",
                                    "image":""
                                }
                            ],
                        },
                        {
                            "skuId":"80005072",
                            "code":"S20003VH.01",
                            "marketPrice":"199.00",
                            "agentPrice":"200.00"
                            "weight":"0.90",
                            "specList":[
                                {
                                    "name":"容量",
                                    "value":"2L",
                                    "image":"http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717161011241.jpg"
                                },
                                {
                                    "name":"颜色",
                                    "value":"新草绿",
                                    "image":""
                                }
                            ],
                        },
                        {
                            "skuId":"80005073",
                            "code":"S1506VH.02",
                            "marketPrice":"189.00",
                            "weight":"0.80",
                            "agentPrice":"200.00"
                            "specList":[
                                {
                                    "name":"容量",
                                    "value":"1.5L",
                                    "image":"http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717162165903.jpg"
                                },
                                {
                                    "name":"颜色",
                                    "value":"馥芮白",
                                    "image":""
                                }
                            ],
                        },
                        {
                            "skuId":"80005074",
                            "code":"S1506VH.01",
    
                            "weight":"0.80",
                            "marketPrice":"189.00",
                            "agentPrice":"200.00"
                            "specList":[
                                {
                                    "name":"容量",
                                    "value":"1.5L",
                                    "image":"http://zmzx-b2b.oss-cn-hangzhou.aliyuncs.com/goods/2020052717162532347.jpg"
                                },
                                {
                                    "name":"颜色",
                                    "value":"新草绿",
                                    "image":""
                                }
                            ],
                        }
                    ],
                    status:"1",
                    agentStatus:"1",
                    agentRejectReason:""
                },
            ],
            "total":1
        }
    }

我们接收R对象

public class R<T> implements Serializable {
        private static final int SUCCESS = 200;
        private static final String SUCCESS_MESSAGE = "success";
        private static final long serialVersionUID = 1L;
        private int code = 200;
        private String message = "success";
        private T data;
    }

### 2. 对方接收格式是x-www-form-urlencoded ###

我们对应的feign请求是

package com.mall.controller.feign;
    
    import com.mall.controller.feign.fallback.ThirdPriceFeignFallback;
    import com.mall.dto.GoodSkuThirdPriceAddDTO;
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.util.MultiValueMap;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestBody;
    
    /**
     * 三方商品价格
     */
    @FeignClient(url = "${li.host}", name = "cnpc-price", fallbackFactory = ThirdPriceFeignFallback.class)
    public interface ThirdPriceFeign {
    
    //    @PostMapping(value = "/price", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
        @PostMapping(value = "/price",headers = {"content-type=application/x-www-form-urlencoded"})
        GoodSkuThirdPriceAddDTO getThirdPrice(@RequestBody MultiValueMap<String, Object> request);
    
    }

这里参数必须是MultiValueMap，否则转换参数的时候就会报错

### 3. 断点调试 ###

所有的参数封装都会走到org.springframework.cloud.openfeign.support.SpringEncoder\#encode这个方法

![14c6040b58904e15835c5fb170db9dbb.png][]

如上图所示，最终会由

public class AllEncompassingFormHttpMessageConverter extends FormHttpMessageConverter 这个类解析参数

![f5effc8ca4c749aaa87ae81d36a6580e.png][]

最终组装好header和body参数，再去请求

4. 以后还有请求对方接口header带token或其他header信息的，再总结。

[14c6040b58904e15835c5fb170db9dbb.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/18/ef147bbd41344ee8b65dafec9ee898a6.png
[f5effc8ca4c749aaa87ae81d36a6580e.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/18/fe11fe3e020f486b9bd7b040e88822da.png