nanoHTTPD 接收 okhttp 上传的文件

Explained before, the client use okhttp upload a file just like the follow code

 RequestBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
        //sourceFile is a File as you know 
                .addFormDataPart("image_file_1", "logo-square1.png", RequestBody.create(MediaType.parse("image/png"), sourceFile))
                .build();

        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();
        Response response = client.newCall(request).execute();

The following code is just what you want:

@Override
    public Response serve(IHTTPSession session) {

        Method method = session.getMethod();


        // ▼ 1、parse post body ▼
        Map<String, String> files = new HashMap<>();
        if (Method.POST.equals(method) || Method.PUT.equals(method)) {
            try {
                session.parseBody(files);
            } catch (IOException ioe) {
                return getResponse("Internal Error IO Exception: " + ioe.getMessage());
            } catch (ResponseException re) {
                return newFixedLengthResponse(re.getStatus(), MIME_PLAINTEXT, re.getMessage());
            }
        }
        //after the body parsed, by default nanoHTTPD will save the file to cache and put it into params( "image_file_1" as key and the value is "logo-square1.png");
        //files key is just like "image_file_1", and the value is nanoHTTPD's template file path in cache
        // ▲ 1、parse post body ▲


        // ▼ 2、copy file to target path xiaoyee ▼
        Map<String, String> params = session.getParms();
        for (Map.Entry<String, String> entry : params.entrySet()) {
            final String paramsKey = entry.getKey();
            if (paramsKey.contains("image_file_1")) {
                final String tmpFilePath = files.get(paramsKey);
                final String fileName = paramsKey;
                final File tmpFile = new File(tmpFilePath);
                final File targetFile = new File(mCurrentDir + fileName);
                LogUtil.log("copy file now, source file path: %s,target file path:%s", tmpFile.getAbsoluteFile(), targetFile.getAbsoluteFile());
                //a copy file methoed just what you like
                copyFile(tmpFile, targetFile);

                //maybe you should put the follow code out
                return getResponse("Success");
            }
        }
        // ▲ 2、copy file to target path xiaoyee ▲

        return getResponse("Error 404: File not found");
    }

本文为自己在博客的一个备份，我的原回答在：
https://stackoverflow.com/questions/28739744/nanohttpd-how-to-save-uploaded-file-to-sdcard-folder/43154040#43154040
author：xiaoyee