400错误的请求无效的动词SharePoint休息Api Java版本

Question

我正在尝试向SharePoint REST接口发布请求。我正在尝试更新列值。当我使用Fiddler（Response：204）时，我能够成功完成此操作。当我使用Apache HttpClient发送时，我收到400个错误请求 - 无效的动词。请注意，当我尝试使用Fiddler作为此程序的代理（本地主机，端口8888）时，请求成功完成。但是，当我再次删除代理并尝试它是不成功的。我的Java代码有问题吗？

这是通过HTTP发送JSON字符串的方式吗？

private static final String API_ENDPOINT = "/_api/web"; 
    private static final String CONTEXT_INFO_ENDPOINT = "/_api/contextinfo"; 
    private static final String APPLICATION_JSON = "application/json;odata=verbose"; 
    private static final String IF_MATCH = "If-Match"; 
    private static final String X_HTTP_Method = "X-HTTP-Method"; 
    private static final String MERGE = "MERGE"; 
    private static final String X_RequestDigest = "X-RequestDigest"; 
    private static final String METADATA = "__metadata"; 

    public static boolean setFieldValue(CloseableHttpClient httpClient, String siteURL, String serverRelativeURL, String fieldName, String fieldValue, String fieldType) { 

    CloseableHttpResponse response = null; 

    try { 
     URI siteURI = new URI(siteURL); 
     URI postURI = new URIBuilder(siteURI) 
       .setPath(siteURI.getPath() + API_ENDPOINT + "/GetFileByServerRelativeUrl('" + serverRelativeURL + "')/ListItemAllFields") 
       .build(); 
     HttpPost postRequest = new HttpPost(postURI); 

     postRequest.addHeader(HttpHeaders.ACCEPT, APPLICATION_JSON); 
     postRequest.addHeader(HttpHeaders.CONTENT_TYPE, APPLICATION_JSON); 
     postRequest.addHeader(HttpHeaders.HOST, siteURI.getHost()); 
     postRequest.addHeader(IF_MATCH, "*"); 
     postRequest.addHeader(X_HTTP_Method, MERGE); 

     String formDigestValue = getFormDigestValue(httpClient, siteURI); 
     if (StringUtils.isBlank(formDigestValue)) { 
      logger.error("FORM DIGEST VALUE IS = " + formDigestValue); 
      return false; 
     } 
     postRequest.addHeader(X_RequestDigest, formDigestValue); 

     JSONObject type = new JSONObject(); 
     type.put("type", fieldType); 

     JSONObject jsonBody = new JSONObject(); 
     jsonBody.put(METADATA , type); 
     jsonBody.put(fieldName, fieldValue); 


     logger.debug("setFieldValue(): " + jsonBody.toString()); 
     postRequest.setEntity(new StringEntity(jsonBody.toString())); 
     //String jsonString = "{'__metadata':{'type':'SP.Data.NextlabsDLItem'},'TextHeader':'Java1'}"; 
     //JSONObject jsonObject = new JSONObject(jsonString); 
     //logger.debug(jsonObject); 
     //postRequest.setEntity(new ByteArrayEntity(jsonBody.toString().getBytes(), ContentType.APPLICATION_JSON)); 
     logger.debug("setFieldValue(): " + postRequest.getRequestLine()); 

     response = httpClient.execute(postRequest); 

     logger.debug("setFieldValue(): " + response.getStatusLine()); 

     int status = response.getStatusLine().getStatusCode(); 

     HttpEntity entity = response.getEntity(); 
     BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent())); 
     int cp; 
     StringBuilder sb = new StringBuilder(); 
     while ((cp = bufferedReader.read()) != -1) { 
      sb.append((char) cp); 
     } 
     logger.debug("String Response......." + sb); 
     bufferedReader.close(); 
     if (status >= 200 && status < 300) { 
      return true; 
     } else { 
      logger.error("setFieldValue(): " + response.getStatusLine().toString().toUpperCase()); 
     } 

    } catch (URISyntaxException | IOException e) { 
     logger.error("setFieldValue(): " + e.getMessage(), e); 
    } finally { 
     try { 
      if (response != null) { 
       response.close(); 
      } 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 
    return false; 

} 

Answer 1

对不起张贴我自己的答案，但最终发现了问题。

在Apache HTTPClient中启用了错误ExpectContinuedFlag。

我在HTTP初始化中更改了以下内容，现在它可以工作！

RequestConfig requestConfig = RequestConfig.custom() 
      .setExpectContinueEnabled(***false***) 
      .setTargetPreferredAuthSchemes(Arrays.asList(AuthSchemes.NTLM, AuthSchemes.DIGEST)) 
      .setProxyPreferredAuthSchemes(Collections.singletonList(AuthSchemes.BASIC)) 
      .build(); 

    return HttpClients.custom() 
      .setConnectionManager(connManager) 
      .setDefaultCredentialsProvider(creds) 
      .setDefaultRequestConfig(requestConfig) 
      .build();