Question

伙计们我想使用android上的node.js＆socket.io作为二进制流将图像发送到服务器，任何人都可以帮忙吗？

Answer 1

Android中有几个库可以上传大文件，例如图像和视频。除非您将其作为学习经验来使用，否则几乎可以肯定使用其中一种会更容易。最近的一些内容包括：

一个较旧的库是apache MultiPartMine库-在此处查看示例，以获取视频而非图像，但适用相同的原理：

//Create a new Multipart HTTP request to upload the video
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(serverURL);

        //Create a Multipart entity and add the parts to it
        try {
            Log.d("VideoUploadTask doInBackground","Building the request for file: " + videoPath);
            FileBody filebodyVideo = new FileBody(new File(videoPath));
            StringBody title = new StringBody("Filename:" + videoPath);
            StringBody description = new StringBody("Test Video");
            MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
            reqEntity.addPart("videoFile", filebodyVideo);
            reqEntity.addPart("title", title);
            reqEntity.addPart("description", description);
            httppost.setEntity(reqEntity);
        } catch (UnsupportedEncodingException e1) {
            //Log the error
            Log.d("VideoUploadTask doInBackground","UnsupportedEncodingException error when setting StringBody for title or description");
            e1.printStackTrace();
            return -1;
        }

        //Send the request to the server
        HttpResponse serverResponse = null;
        try {
            Log.d("VideoUploadTask doInBackground","Sending the Request");
            serverResponse = httpclient.execute( httppost );
        } catch (ClientProtocolException e) {
            //Log the error
            Log.d("VideoUploadTask doInBackground","ClientProtocolException");
            e.printStackTrace();
        } catch (IOException e) {
            //Log the error
            Log.d("VideoUploadTask doInBackground","IOException");
            e.printStackTrace();
        }

        //Check the response code
        Log.d("VideoUploadTask doInBackground","Checking the response code");
        if (serverResponse != null) {
            Log.d("VideoUploadTask doInBackground","ServerRespone" + serverResponse.getStatusLine());
            HttpEntity responseEntity = serverResponse.getEntity( );
            if (responseEntity != null) {
                //log the response code and consume the content
                Log.d("VideoUploadTask doInBackground","responseEntity is not null");
                try {
                    responseEntity.consumeContent( );
                } catch (IOException e) {
                    //Log the (further...) error...
                    Log.d("VideoUploadTask doInBackground","IOexception consuming content");
                    e.printStackTrace();
                }
            } 
        } else {
            //Log that response code was null
            Log.d("VideoUploadTask doInBackground","serverResponse = null");
            return -1;
        }

此处的完整示例：https://stackoverflow.com/a/32887541/334402

类似地，在节点侧，您可以利用标准库来上传文件。一个例子就是聚会：

Multer是用于处理multipart / form-data的node.js中间件，主要用于上传文件。它是在busboy之上编写的，以实现最大效率。

这里有一个经过测试（尽管几年前..）的示例：https://stackoverflow.com/a/41567587/334402

如果您确实想编写自己的服务器端解析器，则此答案中包含一些最新信息：https://stackoverflow.com/a/23718166/334402

Android使用socket.io

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