Java：MultiDataSource 解决 CVAuto 下载 Excel 报告时调用 Nodejs 接口来生成渲染图时接收不到完整 request body

Author: TommyLemon

APIJSON-Java-Server/APIJSONBoot-MultiDataSource/pom.xml

@@ -318,11 +318,11 @@
 
 
  <!-- DemoController /delegate 代理转发请求 HTTP PATCH 方法需要，使用 PATCH 可以取消注释 -->
- <!-- <dependency>-->
- <!-- <groupId>org.apache.httpcomponents.client5</groupId>-->
- <!-- <artifactId>httpclient5</artifactId>-->
- <!-- <version>5.3</version>-->
- <!-- </dependency>-->
+ <dependency>
+ <groupId>org.apache.httpcomponents.client5</groupId>
+ <artifactId>httpclient5</artifactId>
+ <version>5.3</version>
+ </dependency>
 
 <!-- &lt;!&ndash; 需要用的 HikariCP 数据库连接池库，3.1.0 以上 &ndash;&gt;-->
 <!-- <dependency>-->

APIJSON-Java-Server/APIJSONBoot-MultiDataSource/src/main/java/apijson/boot/DemoController.java

@@ -24,6 +24,7 @@
 
 import jakarta.servlet.AsyncContext;
 import jakarta.servlet.ServletResponse;
+import org.jetbrains.annotations.NotNull;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.*;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
@@ -37,6 +38,7 @@
 import java.lang.reflect.Method;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.rmi.ServerException;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
@@ -1875,6 +1877,18 @@ else if (recordType > 0) {
  CLIENT.getMessageConverters().forEach(converter -> {
  if (converter instanceof StringHttpMessageConverter) {
  ((StringHttpMessageConverter) converter).setWriteAcceptCharset(false);
+ // 设置更大的缓冲区来处理大文本
+ ((StringHttpMessageConverter) converter).setDefaultCharset(StandardCharsets.UTF_8);
+ }
+ });
+
+ // 添加自定义的消息转换器来处理大文本
+ CLIENT.getMessageConverters().add(0, new StringHttpMessageConverter(StandardCharsets.UTF_8) {
+ @NotNull
+ @Override
+ protected Long getContentLength(String s, MediaType contentType) {
+ // 对于大文本，返回 null 让HTTP客户端自动处理分块传输
+ return s.length() > 1024 * 1024 ? -1L : super.getContentLength(s, contentType);
  }
  });
  }
@@ -1886,6 +1900,32 @@ else if (recordType > 0) {
  protected String sendRequest(HttpSession session, HttpMethod method, String url, String body, HttpHeaders headers) {
  String rspBody = null;
  try {
+ // 为JSON请求设置默认的Content-Type
+ if (body != null && method != HttpMethod.GET && !headers.containsKey(HttpHeaders.CONTENT_TYPE)) {
+ // 尝试解析JSON来判断内容类型
+ try {
+ JSON.parse(body);
+ headers.setContentType(MediaType.APPLICATION_JSON);
+ } catch (Exception e) {
+ // 如果不是JSON，设置为普通文本
+ headers.setContentType(MediaType.TEXT_PLAIN);
+ }
+ }
+ 
+ // 设置默认的Accept header
+ if (!headers.containsKey(HttpHeaders.ACCEPT)) {
+ headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN));
+ }
+ 
+ // 为大文本body，设置适当的Content-Type和分块传输
+ if (body != null && body.length() > 1024 * 1024) { // 超过1MB
+ if (!headers.containsKey(HttpHeaders.CONTENT_TYPE)) {
+ headers.setContentType(MediaType.TEXT_PLAIN);
+ }
+ // 设置分块传输
+ headers.set(HttpHeaders.TRANSFER_ENCODING, "chunked");
+ }
+ 
  HttpEntity<String> requestEntity = new HttpEntity<>(method == HttpMethod.GET ? null : body, headers);
  ResponseEntity<String> entity = CLIENT.exchange(url, method, requestEntity, String.class);
 

APIJSON-Java-Server/APIJSONBoot-MultiDataSource/src/main/java/apijson/boot/FileController.java

@@ -360,9 +360,23 @@ public ResponseEntity<Object> downloadCVReport(@PathVariable(name = "id") String
 JSONObject renderReq = new JSONObject();
 renderReq.put("img", img);
 renderReq.put("data", resObj);
-renderReq.put("wrongs", testRecord.getJSONArray("wrongs"));
+renderReq.put("wrongs", testRecord.get("wrongs"));
 String body = renderReq.toJSONString();
+
+// 设置完整的HTTP headers
 HttpHeaders headers = new HttpHeaders();
+headers.setContentType(MediaType.APPLICATION_JSON);
+headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
+headers.set("User-Agent", "APIJSON-Server/1.0");
+headers.set("X-Requested-With", "XMLHttpRequest");
+
+// 如果body很大，设置适当的headers来支持大文件传输
+if (body.length() > 1024 * 1024) { // 超过1MB
+headers.set("Transfer-Encoding", "chunked");
+} else {
+headers.setContentLength(body.length());
+}
+
 String renderStr = demoController.sendRequest(session, HttpMethod.POST, "http://localhost:3003/cv/render", body, headers);
 renderStr = StringUtil.trim(renderStr);
 if (renderStr.length() > 100) {

APIJSON-Java-Server/APIJSONBoot-MultiDataSource/src/main/resources/application.yml

@@ -1,8 +1,8 @@
 spring:
  servlet:
  multipart:
- max-file-size: 10MB
- max-request-size: 10MB
+ max-file-size: 50MB
+ max-request-size: 50MB
  enabled: true
  file-size-threshold: 2KB
 # If using flyway-core dependency, either comment this out or use @FlywayDatasource in DemoDataSourceConfig

APIJSON-Java-Server/APIJSONBoot-MultiDataSource/src/main/resources/static/cv/js/server.js

@@ -199,15 +199,15 @@ app.use(async ctx => {
 // while (! done[0]) {
 // }
  }
-  else if (ctx.path == '/cv/render') {
+ else if (ctx.path == '/cv/render') {
 // done = [false];
 // var json = '';
 // ctx.req.addListener('data', (data) => {
 //	json += data;
 //	})
 //	ctx.req.addListener('end', function() {
 //	console.log(json);
- var body = ctx.body || ctx.req.body || ctx.request.body|| {}; // || JSON.parse(json) || {};
+ var body = ctx.body || ctx.req.body || ctx.request.body || {}; // || JSON.parse(json) || {};
  if (DEBUG) {
  console.log('\n\n <<<<<<< body = ' + body);
  console.log('\n\n <<<<<<< body = ' + JSON.stringify(body));