如何使用restTemplate获取真正的http代码和响应正文？

Question

我有以下代码：

LinkedMultiValueMap<String, Object> map = new LinkedMultiValueMap<>();

        FileSystemResource fileSystemResource = new FileSystemResource(fileNameWithPath);
 map.add("file", fileSystemResource);
        map.add("type", fileType);
        map.add("org_id", systemSettingsService.getSystemSettings().getOrganizationId());
        map.add("stone_id", stoneId);

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.MULTIPART_FORM_DATA);
        HttpEntity<LinkedMultiValueMap<String, Object>> requestEntity = new HttpEntity<>(map, headers);

restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class)

如果我提供所有正确的参数 - enpoint返回200 http stsatus代码，如预期的Postman应用程序。

但如果我提供了错误的网址 - 我看到异常：

 org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://external_server/api/v1/push_file1": Broken pipe (Write failed); nested exception is java.net.SocketException: Broken pipe (Write failed)
 at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:666)
 at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
 at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:531)
 at com.pack.GenericDataServiceImpl.pushAttachment(GenericDataServiceImpl.java:311)
 at com.pack.FailedAttachmentPushReSender.retryFailedPushes(FailedAttachmentPushReSender.java:24)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
 at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
 at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
 at java.util.concurrent.Executors$RunnableAdapter.call$$$capture(Executors.java:511)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java)
 at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
 at java.util.concurrent.FutureTask.run(FutureTask.java)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 at java.lang.Thread.run(Thread.java:748) Caused by: java.net.SocketException: Broken pipe (Write failed)
 at java.net.SocketOutputStream.socketWrite0(Native Method)
 at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111)
 at java.net.SocketOutputStream.write(SocketOutputStream.java:155)
 at sun.security.ssl.OutputRecord.writeBuffer(OutputRecord.java:431)
 at sun.security.ssl.OutputRecord.write(OutputRecord.java:417)
 at sun.security.ssl.SSLSocketImpl.writeRecordInternal(SSLSocketImpl.java:886)
 at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:857)
 at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:123)
 at org.apache.http.impl.io.SessionOutputBufferImpl.streamWrite(SessionOutputBufferImpl.java:124)
 at org.apache.http.impl.io.SessionOutputBufferImpl.write(SessionOutputBufferImpl.java:160)
 at org.apache.http.impl.io.ContentLengthOutputStream.write(ContentLengthOutputStream.java:113)
 at org.apache.http.entity.ByteArrayEntity.writeTo(ByteArrayEntity.java:114)
 at org.apache.http.impl.DefaultBHttpClientConnection.sendRequestEntity(DefaultBHttpClientConnection.java:156)
 at org.apache.http.impl.conn.CPoolProxy.sendRequestEntity(CPoolProxy.java:160)
 at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:238)
 at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:123)
 at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272)
 at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
 at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
 at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
 at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
 at org.springframework.http.client.HttpComponentsClientHttpRequest.executeInternal(HttpComponentsClientHttpRequest.java:89)
 at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
 at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
 at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:652) ... 20 more 

但是当我以相同的方式修改postman中的url时 - 我看到404错误：

我希望像邮递员一样得到回复，像邮递员一样回应。

如果我提供File而不是FileSystemResource我会得到正确的HttpStatusException ，我可以在其中提取我想要的数据：

catch (HttpStatusCodeException e) {          
            String response = e.getResponseBodyAsString();
            logger.error("Error during attachment push for file: {}, responseText: {}", fileNameWithPath, response, e);
}

如何编写将提取response和httpStatusCode通用代码？

PS1。

RestTemplate初始化：

CloseableHttpClient httpClient
                = HttpClients.custom()
                .setSSLHostnameVerifier(new NoopHostnameVerifier())
                .build();
        HttpComponentsClientHttpRequestFactory requestFactory
                = new HttpComponentsClientHttpRequestFactory();
        requestFactory.setHttpClient(httpClient);
        restTemplate = new RestTemplate(requestFactory);

PS2

我已经读过RestTemplate ClientHttpResponse.getBody（）抛出I / O错误，但看起来已经使用了建议的工厂

PS3

我试过这个：

CloseableHttpClient client = HttpClients.createDefault();
            HttpPost httpPost = new HttpPost(buildAttachmentPushUrl());

            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            builder.addBinaryBody("file", fileSystemResource.getFile(), ContentType.APPLICATION_OCTET_STREAM, fileSystemResource.getFilename());
            builder.addTextBody("type", fileType);
            builder.addTextBody("org_id", systemSettingsService.getSystemSettings().getOrganizationId());
            builder.addTextBody("stone_id", stoneId);

            HttpEntity multipart = builder.build();

            httpPost.setEntity(multipart);

            CloseableHttpResponse response = client.execute(httpPost);
            logger.info("response code {}", response.getStatusLine().getStatusCode());

            client.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

但结果相同 - socket write error

Answer 1

如何使用restTemplate获取真正的http代码和响应正文？

简短的回答是你不能，因为没有一个。

org.springframework.web.client.ResourceAccessException：对“ https://external_server.ventures/api/v1/push_file1 ”的POST请求的I / O错误：软件导致连接中止：套接字写入错误; 嵌套异常是java.net.SocketException：软件导致连接中止：套接字写入错误

阅读异常消息。 原因（您已省略堆栈跟踪）是一个带有底层socket write error的java.net.SocketException 。

您从未收到过回复，因为您可能从未完成过发送请求。 由于某些原因，请参阅链接的问题。

---

RestClientResponseException是你想要捕获的。 它涵盖了与您可能收到的响应相关的所有错误，并提供对状态，标题和正文的访问权限。 你抛出的是ResourceAccessException ，它涵盖了可能发生的所有I / O错误，并且没有任何响应。

Answer 2

我通常使用这种模式，可能适合你

try{
    ResponseEntity<String> responseEntity = restTemplate.exchange(url, httpMethod, httpEntity, String.class);
    HttpStatus.Series responseSeries = responseEntity.getStatusCode().series();
    if(!HttpStatus.Series.SERVER_ERROR.equals(responseSeries)){
        return responseEntity;
    }
}
catch(HttpClientErrorException e){
    //handle exception here
    //Response received from server: {} ", e.getResponseBodyAsString());
}
catch (RestClientException e) {
    //handle exception here
}
catch (Exception e) {
    //handle exception here
}