Apache HttpClient 进行 Post 请求 异常问题（ Java 对接 walmart mp）

[RedBeanIce]

（由于请求 walmart 有账号密码，属于公司保密信息，所以无法提供实际代码）

问题：请求异常只体现在日志中，如下面的第三行日志就是日志，有体现 carrier 字段是错误的。
如果在 response 里面获取，只能获取到 bad request ，没有具体的某个字段的错误。

请问，我如何获取到日志里面的报错，然后在自己写的代码里面获取到这个报错，自己打印出来。

1 ，
```
请求框架是，Apache HttpClient

org.apache.httpcomponents
4.5.6
HttpClient
```

```
17:33:50.629 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "Connection: close[\r][\n]"
17:33:50.629 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "[\r][\n]"
17:33:50.629 [main] DEBUG org.apache.http.wire - http-outgoing-0 << "{"errors":{"error":[{"code":"INVALID_REQUEST_CONTENT.GMP_ORDER_API","field":"carrier","description":"Unsupported carrier 'Fedex' was specified in line number 1. Only pre-defined names are allowed for 'carrier.' For a list of acceptable carriers, see https://developer.walmart.com/api/us/mp/orders#operation/shippingUpdates . If you select 'otherCarrier' you must also provide the tracking URL.","info":"Request content is invalid.","severity":"ERROR","category":"DATA","errorIdentifiers":{"entry":[]}}]}}"
17:33:50.629 [main] DEBUG org.apache.http.headers - http-outgoing-0 << HTTP/1.1 400 Bad Request
17:33:50.629 [main] DEBUG org.apache.http.headers - http-outgoing-0 << Accept-Ranges: bytes

```

2 ，如果换成 resttemplate ，那么直接连日志也没有了。。response 和上述一样
我将日志等级修改 debug ，也是没有日志，只有 response 。


问题：如开头

[lsk569937453]

http 状态码 400 很明显了，你的请求入参不对。

[RedBeanIce]

@lsk569937453

请再看一下我的问题。我们问题不是 400 。

而是具体的详细的报错，仅仅体现在日志中，无法让 ta 体现在返参中。

[hmmm000]

resttemplate 可以通过 catch HttpStatusCodeException ，用 getResponseBodyAsString 方法获取非 200 返回的响应体。httpclient 不清楚。

[xiaokongwu]

“如果在 response 里面获取，只能获取到 bad request ，没有具体的某个字段的错误。”

贴一下获取代码吧

[RedBeanIce]

@hmmm000

```
请求方式

HttpEntity<String> request = new HttpEntity<>(parse.toJSONString(), headersV2);
String personResultAsJsonStr = null;
try {
personResultAsJsonStr = restTemplate.postForObject(url, request, String.class);
} catch (RestClientException e) {
e.printStackTrace();
}
System.out.println(personResultAsJsonStr);

```

```
打印

19:05:22.927 [main] DEBUG org.springframework.web.client.RestTemplate - Created POST request for "https://marketplace.walmartapis.com/v3/orders/108829823812146/shipping"
19:05:22.928 [main] DEBUG org.springframework.web.client.RestTemplate - Setting request Accept header to [text/plain, application/json, application/cbor, application/*+json, */*]
19:05:22.929 [main] DEBUG org.springframework.web.client.RestTemplate - Writing [{"orderShipment":{"orderLines":{"orderLine":[{"lineNumber":"1","orderLineStatuses":{"orderLineStatus":[{"status":"Shipped","statusQuantity":{"amount":"1","unitOfMeasurement":"EACH"},"trackingInfo":{"carrierName":{"carrier":"Fedex"},"methodCode":"Standard","shipDateTime":1698132951000,"trackingNumber":"785444130107"}}]},"sellerOrderId":"FO231024144001001"}]}}}] using [org.springframework.http.converter.StringHttpMessageConverter@7a362b6b]
19:05:23.423 [main] DEBUG org.springframework.web.client.RestTemplate - POST request for "https://marketplace.walmartapis.com/v3/orders/108829823812146/shipping" resulted in 400 (Bad Request); invoking error handler
null
org.springframework.web.client.HttpClientErrorException: 400 Bad Request
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:118)
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:103)
at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:730)

```

但是我想要的是，，

"{"errors":{"error":[{"code":"INVALID_REQUEST_CONTENT.GMP_ORDER_API","field":"carrier","description":"Unsupported carrier 'Fedex' was specified in line number 1. Only pre-defined names are allowed for 'carrier.' For a list of acceptable carriers, see https://developer.walmart.com/api/us/mp/orders#operation/shippingUpdates . If you select 'otherCarrier' you must also provide the tracking URL.","info":"Request content is invalid.","severity":"ERROR","category":"DATA","errorIdentifiers":{"entry":[]}}]}}

它提示我，，，carrier 字段有问题。。（相关描述，请看开头）

[RedBeanIce]

@xiaokongwu

apache http ，，，伪代码
```
// 执行请求
CloseableHttpResponse response = httpClient.execute(post, new BasicHttpContext());
// 返回的状态 200 404 等等
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode != 200) {
logger.info("request url failed, http code={}, url={}", response.getStatusLine().getStatusCode(), url);
return null;
}
```
如果像是上述代码获取，，则只能获取到 bad request


报错都在日志打印里面，org.apache.http.wire ，carrier 字段有问题

[hmmm000]

@RedBeanIce
String personResultAsJsonStr = null;
try {
personResultAsJsonStr = restTemplate.postForObject(url, request, String.class);
} 
catch (HttpStatusCodeException e) {
//你要的响应体
System.out.println(e.getResponseBodyAsString());
}

[ZZ74]

OP 写代码时首先要明白自己要什么。
你现在要的是那段报错 json OK
那么 httpclient 你请求时就要返回一个 response ，然后判断 http code ，400 就取 response 的内容，那就是你要的东西。至于是哪个 api 可以自行查找

resttemplate 没用过 楼上的应该就行。

[0xsui]

最简单方法就是用 postman ，在浏览器里调试获取到登录的连接和所有请求参数，复制粘贴到 postman ，发起请求调试没问题了，直接在 postman 里面生成 java 代码，复制代码到开发工具，运行就行了，这些网络请求代码完全不用自己写。

[RedBeanIce]

@RedBeanIce

apache http ，，，伪代码
```
// 执行请求
CloseableHttpResponse response = httpClient.execute(post, new BasicHttpContext());
// 返回的状态 200 404 等等
int statusCode = response.getStatusLine().getStatusCode();
int statusCode = response.getStatusLine().getStatusCode();
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
result = IOUtils.toString(instream, StandardCharsets.UTF_8);
}
if (statusCode != CONNCET_SUCCESS) {
logger.info("request url failed, http code={}, url={}, result={}", response.getStatusLine().getStatusCode(), url, result);
return null;
}
if (statusCode != 200) {
logger.info("request url failed, http code={}, url={}", response.getStatusLine().getStatusCode(), url);
return null;
}



```

[RedBeanIce]

@RedBeanIce

apache http ，，，伪代码
```
// 执行请求
CloseableHttpResponse response = httpClient.execute(post, new BasicHttpContext());
// 返回的状态 200 404 等等
int statusCode = response.getStatusLine().getStatusCode();

HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
result = IOUtils.toString(instream, StandardCharsets.UTF_8);
}
if (statusCode != 200) {
logger.info("request url failed, http code={}, url={}, result={}", response.getStatusLine().getStatusCode(), url, result);
return null;
}


result 里面就是，成功信息，或者是异常信息

```

[xiaokongwu]

OP 的意思应该是，status 400 时，`result = IOUtils.toString(instream, StandardCharsets.UTF_8);`获取不到内容

[RedBeanIce]

@xiaokongwu

hhhh ，是我让你产生误解了。很抱歉。

最开始的时候，result 的处理在下面，，现在挪到上面去就好了，

[xiaokongwu]

@RedBeanIce 嗯，那就是 stream 读取的事，可能之前的代码在前面有 read 操作，导致 IOUtils 读不到