java如何通过apachehttpclient上传文件？

Question

我想上传一个文件，如下所述：http://docs.octoprint.org/en/master/api/files.html#upload-file-or-create-folder

我使用ApacheHttpClient发送post连接，但每当我启动该方法时，都不会发生任何事情，应用程序会毫无错误地陷入困境，但就是什么也不做

其他POST和GET请求正在工作，我不需要API密钥，因为我关闭了身份验证

CloseableHttpClient posterClient = HttpClients.createDefault();
        HttpPost post = new HttpPost("http://localhost:5002/api/files/local");
        post.setHeader("Host", "http://localhost:5002");
        post.setHeader("Content-Type", "multipart/form-data; boundary=----WebKitFormBoundaryDeC2E3iWbTv1PwMC");

        post.setHeader("X-Api-Key", "");


        HttpEntity entity = MultipartEntityBuilder
                .create()

                .addBinaryBody("file", new File("/Users/florian/eclipse-workspace/docker-Client/src/main/java/test/dog3.gcode"), ContentType.create("multipart/form-data"), "dog.gcode")
                .addTextBody("select", "true")
                .addTextBody("print", "true")
                .build();


        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        entity.writeTo(bytes);
        String content = bytes.toString();
        StringEntity entity2 = new StringEntity(content, ContentType.APPLICATION_OCTET_STREAM);
        entity2.setContentEncoding("application/octet-stream");
        post.setEntity(entity2);
        CloseableHttpResponse answer = posterClient.execute(post);

如果我打印帖子，我将获得（删除gcode说明）：

RequestLine:POST http://localhost:5002/api/files/local HTTP/1.1
Header:boundary=----WebKitFormBoundaryDeC2E3iWbTv1PwMC;
Content:--JIDzHYxyG74480VXGugHYTI-7xe5OrZ8
Content-Disposition: form-data; name="file"; filename="dog.gcode"
Content-Type: multipart/form-data
Content-Transfer-Encoding: binary

M5
G90
G21
G1 F3000
G1  X18.0359 Y51.0881
M3 S90
G4 P0.3

--JIDzHYxyG74480VXGugHYTI-7xe5OrZ8
Content-Disposition: form-data; name="select"
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit

true
--JIDzHYxyG74480VXGugHYTI-7xe5OrZ8
Content-Disposition: form-data; name="print"
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit

true
--JIDzHYxyG74480VXGugHYTI-7xe5OrZ8--

所以。。。不完全是我想要的

Answer 1

好的，现在我的代码看起来是这样的，而且可以正常工作。要删除内容类型编码等不必要的行，必须将ode设置为“浏览器兼容”

CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpEntity entity = MultipartEntityBuilder.create().setMode(
HttpMultipartMode.BROWSER_COMPATIBLE).setBoundary("  WebKitFormBoundaryDeC2E3iWbTv1PwMC").setContentType(
ContentType.MULTIPART_FORM_DATA)
                .addBinaryBody("file",
                        new File("PATH"),
                        ContentType.APPLICATION_OCTET_STREAM, "filename.gcode")
                .addTextBody("select", "true", ContentType.MULTIPART_FORM_DATA).addTextBody("print", "true", ContentType.MULTIPART_FORM_DATA)
                .build();

        HttpPost httpPost = new HttpPost("http://localhost:5002/api/files/local");
        httpPost.addHeader("Host", "http://localhost:5002");
        httpPost.addHeader("X-Api-Key", "88CC15F3B5864CCAB19981A8B67A4071");
        httpPost.addHeader("Content-Type", "multipart/form-data; boundary=  WebKitFormBoundaryDeC2E3iWbTv1PwMC");
        httpPost.setEntity(entity);
        //betterPrint(httpPost);
        HttpResponse response = httpClient.execute(httpPost);

        HttpEntity result = response.getEntity();