如何通过 apache-httpclient 上传文件？

Question

我想按此处所述上传文件：http://docs.octoprint.org/en/master/api/files.html#upload-file-or-create-folder

我使用 apache-httpclient 发送一个 post 连接，但是每当我启动该方法时，什么也没有发生，应用程序无错误地卡住了，但什么也没做。

其他 POST 和 GET 请求正在运行，我不需要 API-Key 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 POST，我会得到（已删除的 gcode 指令）：


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...不是我想要的...

Answer 1

好的，现在我的代码看起来像这样并且可以正常工作。要删除不必要的行，如 Content-Type-Encoding，您必须将 ode 设置为 "browser-compatible"

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();

如何通过 apache-httpclient 上传文件？

How to upload a file via apache-httpclient?

java

apache-httpclient-4.x

octoprint