Wps开放平台v5升级v7上传实体文件踩坑（Java使用restTemplate）

背景：最近接到一个老项目需求，之前开发的WPS开放平台文件（商密集成）预览功能因为升级需要重新对接api，新的上传文件接口踩坑特意记录一下。

这里出问题的是第二步，请求文件上传信息

踩坑代码调用后403 postman粘贴请求头和地址发起模拟调用成功

java 复制代码

private String upload(StoreRequest storeRequest, File file) throws IOException, URISyntaxException {
        URI url = new URIBuilder(storeRequest.getUrl()).build();
        HttpHeaders headers = new HttpHeaders();
        List<Header> storeRequestHeaders = storeRequest.getHeaders();
        storeRequestHeaders.forEach(header -> headers.add(header.getName(), header.getValue()));
        byte[] fileBytes = Files.readAllBytes(file.toPath());
        HttpEntity<byte[]> requestEntity = new HttpEntity<>(fileBytes, headers);
        return restTemplate.postForObject(url,requestEntity, String.class).getBody();
    }

修改后：

java 复制代码

private String upload(StoreRequest storeRequest, File file) throws IOException,  NoSuchAlgorithmException, KeyStoreException, KeyManagementException {
        // 1. 读取文件为字节数组
        byte[] fileBytes = Files.readAllBytes(file.toPath());

        // 2. 创建信任所有证书的 HttpClient
        SSLContext sslContext = new SSLContextBuilder()
                .loadTrustMaterial(null, (chain, authType) -> true)
                .build();

        try (CloseableHttpClient httpClient = HttpClients.custom()
                .setSSLContext(sslContext)
                .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
                .build()) {

            // 3. 创建 POST 请求
            HttpPost httpPost = new HttpPost(storeRequest.getUrl());

            // 4. 设置 Headers（保持原始 Content-Type）
            List<Header> storeRequestHeaders = storeRequest.getHeaders();
            storeRequestHeaders.forEach(header ->
                    httpPost.addHeader(header.getName(), header.getValue())
            );

            // 5. 设置请求体（二进制数据）
            ByteArrayEntity requestEntity = new ByteArrayEntity(fileBytes);
            httpPost.setEntity(requestEntity);

            // 6. 执行请求并获取响应
            HttpResponse response = httpClient.execute(httpPost);
            org.apache.http.Header[] headers = response.getHeaders("X-Wps3-Info-Token");

            // 7. 返回响应头中的 Token
            return headers[0].getValue();
        }
    }

问题原因

使用RestTemplate会自动根据上传二进制文件自动响应Content-Type为application/octet-stream

后与wps开发确认，此处的确是传空字符串。