spring cloud gateway讀取請求參數(shù)
1. 我的版本：
- spring-cloud：Hoxton.RELEASE
- spring-boot：2.2.2.RELEASE
- spring-cloud-starter-gateway
2. 請求日志
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import lombok.extern.slf4j.Slf4j;import org.springframework.cloud.gateway.filter.GatewayFilterChain;import org.springframework.cloud.gateway.filter.GlobalFilter;import org.springframework.core.io.buffer.DataBuffer;import org.springframework.core.io.buffer.DataBufferUtils;import org.springframework.http.HttpMethod;import org.springframework.http.server.reactive.ServerHttpRequest;import org.springframework.http.server.reactive.ServerHttpRequestDecorator;import org.springframework.stereotype.Component;import org.springframework.web.server.ServerWebExchange;import reactor.core.publisher.Flux;import reactor.core.publisher.Mono; import java.nio.charset.StandardCharsets;import java.util.Map;import java.util.stream.Collectors; /** * @author MinWeikai * @date 2019-12-20 18:09:39 */@Slf4j@Componentpublic class LoggerFilter implements GlobalFilter { @Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { ServerHttpRequest request = exchange.getRequest(); String method = request.getMethodValue(); if (HttpMethod.POST.matches(method)) { return DataBufferUtils.join(exchange.getRequest().getBody()) .flatMap(dataBuffer -> { byte[] bytes = new byte[dataBuffer.readableByteCount()]; dataBuffer.read(bytes); String bodyString = new String(bytes, StandardCharsets.UTF_8); logtrace(exchange, bodyString); exchange.getAttributes().put("POST_BODY", bodyString); DataBufferUtils.release(dataBuffer); Flux<DataBuffer> cachedFlux = Flux.defer(() -> { DataBuffer buffer = exchange.getResponse().bufferFactory() .wrap(bytes); return Mono.just(buffer); }); ServerHttpRequest mutatedRequest = new ServerHttpRequestDecorator( exchange.getRequest()) { @Override public Flux<DataBuffer> getBody() { return cachedFlux; } }; return chain.filter(exchange.mutate().request(mutatedRequest) .build()); }); } else if (HttpMethod.GET.matches(method)) { Map m = request.getQueryParams(); logtrace(exchange, m.toString()); } return chain.filter(exchange); } /** * 日志信息 * * @param exchange * @param param 請求參數(shù) */ private void logtrace(ServerWebExchange exchange, String param) { ServerHttpRequest serverHttpRequest = exchange.getRequest(); String path = serverHttpRequest.getURI().getPath(); String method = serverHttpRequest.getMethodValue(); String headers = serverHttpRequest.getHeaders().entrySet() .stream() .map(entry -> " " + entry.getKey() + ": [" + String.join(";", entry.getValue()) + "]") .collect(Collectors.joining("\n")); log.info("\n" + "---------------- ---------------- ---------------->>\n" + "HttpMethod : {}\n" + "Uri : {}\n" + "Param : {}\n" + "Headers : \n" + "{}\n" + "\"<<---------------- ---------------- ----------------" , method, path, param, headers); } } |
3. 測試輸出，我這邊測試沒有問題，日志正常輸出
gateway網(wǎng)關(guān)轉(zhuǎn)發(fā)請求添加參數(shù)
在繼承AbstractGatewayFilterFactory的過濾器中
GET請求添加參數(shù)
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// 參考api文檔中GatewapFilter中“添加請求參數(shù)攔截器”：AddRequestParameterGatewayFilterFactory.java //記錄日志 //logger.info("全局參數(shù)處理: {} url：{} 參數(shù)：{}",method.toString(),serverHttpRequest.getURI().getRawPath(),newRequestQueryParams.toString()); // 獲取原參數(shù) URI uri = serverHttpRequest.getURI(); StringBuilder query = new StringBuilder(); String originalQuery = uri.getRawQuery(); if (org.springframework.util.StringUtils.hasText(originalQuery)) { query.append(originalQuery); if (originalQuery.charAt(originalQuery.length() - 1) != '&') { query.append('&'); } } // 添加查詢參數(shù) query.append(ServiceConstants.COMMON_PARAMETER_ENTERPRISEID+"="+authenticationVO.getEnterpriseId() +"&"+ServiceConstants.COMMON_PARAMETER_USERID+"="+authenticationVO.getUserId()); // 替換查詢參數(shù) URI newUri = UriComponentsBuilder.fromUri(uri) .replaceQuery(query.toString()) .build(true) .toUri(); ServerHttpRequest request = exchange.getRequest().mutate().uri(newUri).build(); return chain.filter(exchange.mutate().request(request).build()); |
POST請求添加參數(shù)
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//從請求里獲取Post請求體 String bodyStr = resolveBodyFromRequest(serverHttpRequest); String userId = "123";// 這種處理方式，必須保證post請求時，原始post表單必須有數(shù)據(jù)過來，不然會報錯 if (StringUtils.isEmpty(bodyStr)) { logger.error("請求異常：{} POST請求必須傳遞參數(shù)", serverHttpRequest.getURI().getRawPath()); ServerHttpResponse response = exchange.getResponse(); response.setStatusCode(HttpStatus.BAD_REQUEST); return response.setComplete(); } //application/x-www-form-urlencoded和application/json才添加參數(shù) //其他上傳文件之類的，不做參數(shù)處理，因為文件流添加參數(shù)，文件原格式就會出問題了 /* if (MediaType.APPLICATION_FORM_URLENCODED_VALUE.equalsIgnoreCase(contentType)) { // 普通鍵值對，增加參數(shù) bodyStr = String.format(bodyStr+"&%s=%s&%s=%s",ServiceConstants.COMMON_PARAMETER_ENTERPRISEID,authenticationVO.getEnterpriseId() ,ServiceConstants.COMMON_PARAMETER_USERID,authenticationVO.getUserId()); }*/ // 新增body參數(shù) if (MediaType.APPLICATION_JSON_VALUE.equalsIgnoreCase(contentType)) { JSONObject jsonObject = new JSONObject(bodyStr); jsonObject.put("userId", userId); bodyStr = jsonObject.toString(); } //記錄日志 logger.info("全局參數(shù)處理: {} url：{} 參數(shù)：{}", method.toString(), serverHttpRequest.getURI().getRawPath(), bodyStr); //下面的將請求體再次封裝寫回到request里，傳到下一級，否則，由于請求體已被消費，后續(xù)的服務(wù)將取不到值 URI uri = serverHttpRequest.getURI(); URI newUri = UriComponentsBuilder.fromUri(uri).build(true).toUri(); ServerHttpRequest request = exchange.getRequest().mutate().uri(newUri).build(); DataBuffer bodyDataBuffer = stringBuffer(bodyStr); Flux<DataBuffer> bodyFlux = Flux.just(bodyDataBuffer); // 定義新的消息頭 HttpHeaders headers = new HttpHeaders(); headers.putAll(exchange.getRequest().getHeaders()); // 添加消息頭// headers.set(ServiceConstants.SHIRO_SESSION_PRINCIPALS,GsonUtils.toJson(authenticationVO)); // 由于修改了傳遞參數(shù)，需要重新設(shè)置CONTENT_LENGTH，長度是字節(jié)長度，不是字符串長度 int length = bodyStr.getBytes().length; headers.remove(HttpHeaders.CONTENT_LENGTH); headers.setContentLength(length); // 設(shè)置CONTENT_TYPE if (StringUtils.isEmpty(contentType)) { headers.set(HttpHeaders.CONTENT_TYPE, contentType); } // 由于post的body只能訂閱一次，由于上面代碼中已經(jīng)訂閱過一次body。所以要再次封裝請求到request才行，不然會報錯請求已經(jīng)訂閱過 request = new ServerHttpRequestDecorator(request) { @Override public HttpHeaders getHeaders() { long contentLength = headers.getContentLength(); HttpHeaders httpHeaders = new HttpHeaders(); httpHeaders.putAll(super.getHeaders()); if (contentLength > 0) { httpHeaders.setContentLength(contentLength); } else { // TODO: this causes a 'HTTP/1.1 411 Length Required' on httpbin.org httpHeaders.set(HttpHeaders.TRANSFER_ENCODING, "chunked"); } return httpHeaders; } @Override public Flux<DataBuffer> getBody() { return bodyFlux; } }; //封裝request，傳給下一級 request.mutate().header(HttpHeaders.CONTENT_LENGTH, Integer.toString(bodyStr.length())); return chain.filter(exchange.mutate().request(request).build()); /** * 從Flux<DataBuffer>中獲取字符串的方法 * @return 請求體 */ private String resolveBodyFromRequest(ServerHttpRequest serverHttpRequest) { //獲取請求體 Flux<DataBuffer> body = serverHttpRequest.getBody(); AtomicReference<String> bodyRef = new AtomicReference<>(); body.subscribe(buffer -> { CharBuffer charBuffer = StandardCharsets.UTF_8.decode(buffer.asByteBuffer()); DataBufferUtils.release(buffer); bodyRef.set(charBuffer.toString()); }); //獲取request body return bodyRef.get(); } |
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/*** 字符串轉(zhuǎn)DataBuffer* @param value* @return*/private DataBuffer stringBuffer(String value) {byte[] bytes = value.getBytes(StandardCharsets.UTF_8);NettyDataBufferFactory nettyDataBufferFactory = new NettyDataBufferFactory(ByteBufAllocator.DEFAULT);DataBuffer buffer = nettyDataBufferFactory.allocateBuffer(bytes.length);buffer.write(bytes);return buffer;} |
以上為個人經(jīng)驗，希望能給大家一個參考，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://blog.csdn.net/weixin_41187876/article/details/103637035
