Question

以下是从Facebook Docs到将文件上传到服务器以发送给指定用户的卷曲：

curl  \
  -F recipient='{"id":"USER_ID"}' \
  -F message='{"attachment":{"type":"file", "payload":{}}}' \
  -F filedata=@/tmp/receipt.pdf \
  "https://graph.facebook.com/v2.6/me/messages?access_token=PAGE_ACCESS_TOKEN"


curl  \
  -F 'recipient={"id":"USER_ID"}' \
  -F 'message={"attachment":{"type":"audio", "payload":{}}}' \
  -F 'filedata=@/tmp/clip.mp3;type=audio/mp3' \
  "https://graph.facebook.com/v2.6/me/messages?access_token=PAGE_ACCESS_TOKEN"

我可以通过Curl做到这一点，但我想用Java和Spring-Boot做到这一点。怎么去呢？

我要发送的文件位于我的src-main-resource-docs文件夹中。

修改1 我想知道这个filedata = @ / tmp / clip.mp3; type = audio / MP3 这应该只是我的资源文件的链接吗？

或者我是否必须将其更改为MultipartFile才能发送？

编辑2 目前这就是我在做的事情：

  CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost uploadFile = new HttpPost("https://graph.facebook.com/v2.6/me/messages?access_token=PAGE_ACCESS_TOKEN");
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.addTextBody("recipient", "{"id":"USER_ID"}", ContentType.APPLICATION_JSON);


        File f = new File("./src/main/resources/docs/test.pdf");
        builder.addBinaryBody(
            "file",
            new FileInputStream(f),
            ContentType.APPLICATION_OCTET_STREAM,
            f.getName()
        );

        HttpEntity multipart = builder.build();
        uploadFile.setEntity(multipart);
        CloseableHttpResponse response = httpClient.execute(uploadFile);
        HttpEntity responseEntity = response.getEntity();

这适用于pdfs

但是在audio / mp3中有一个type = audio / mp3。我把它放在哪里？

Answer 1

最后能够通过发送Api参考将文档/媒体上传到Facebook，这就是我所做的：

我使用 OkHttp3 库来构建请求，

/*
        *For Pdf ->MediaType.parse("file/pdf")
        *For Video-> MediaType.parse("video/mp4")
        *For Image-> MediaType.parse("image/png")
        */
        final MediaType MEDIA_TYPE_PNG=MediaType.parse("audio/mp3");
        final OkHttpClient client =new OkHttpClient();


        RequestBody requestBody = new MultipartBody.Builder()
          .setType(MultipartBody.FORM)
          .addFormDataPart("filedata", "file_name.extension", RequestBody.create(MEDIA_TYPE_PNG, new File("path_of_file")))
          .addFormDataPart("recipient","{\"id\":\"USER_ID\"}")
          .addFormDataPart("message", "{\"attachment\":{\"type\":\"TYPE_OF_FILE\", \"payload\":{}}}")//as in Facebook Docs
          .build();

      Request request = new Request.Builder()
          .url("https://graph.facebook.com/v2.6/me/messages?access_token=ACCESS_TOKEN")
          .post(requestBody)
          .build();


      Response response = client.newCall(request).execute();

      System.out.println(response.body().string());

需要为 IOException

添加异常处理

Answer 2

查看restFb库。有了它，你将能够做到：

String fileName = YOUR_FILE_NAME;
byte[] fileBytes = multipartFile.getBytes(); // could be from MultipartFile, for exaple file upload from browser
String fileType = "text/csv";

BinaryAttachment binaryAttachment = BinaryAttachment.with("file", fileName, fileBytes, fileType);
// FacebookClient from the library, look in the library docs how to use it; 
// also there are several overloaded publish methods you can use
facebookClient.publish(endpoint, String.class, binaryAttachment);

通过发送Api参考上传/发送文件到Facebook

2 个答案: