post方式发送接收文件

//文件post发送

var express = require('express');
var router = express.Router();
var request = require("request");
var fs = require("fs");

fs.readFile("public/img/test.jpg", function (err, data) {
     if (err) {
         res.send({"errMsg":"'图片上传失败'"});
         return;
     }
     var base64str = new Buffer(data).toString('base64'); //图片转字节
     var mkJSON = {
         path: "public/upload",
         img: base64str,
         encoding: 'utf8'
     };
     request({
         url: "127.0.0.1:3000/img",
         method: "post",
         form: {
             mark: "IMG",
             content: JSON.stringify(mkJSON)
         }
     }, function (error, response, body) {
         if (!error && body != undefined && response.statusCode == 200 && body.indexOf("失败") < 0) {
             //fs.unlink(localPath);
                 res.send({
                     success: true
                 });
           } else {
                 console.log("err:" + body);
                     res.send({"errMsg": "图片post失败", success: false});
            }
       });
});

//post的文件进行接收
router.post("/img", function (req, res) {
    var content = req.param('content');
    if (null != content) {
        var temp = JSON.parse(content);
        var mkJSON = temp[0];
        var filePath = mkJSON.path.replace(/B//, '');
        filePath = filePath.substr(0, filePath.lastIndexOf("/"));if (!err) { //目录创建成功
            fs.writeFileSync(mkJSON.path.replace(/B//, ''), new Buffer(mkJSON.img.replace(/ /g, '+'), 'base64'));
            //res.json({"newImgPath": constClass.ip + "/image/" + mkJSON.path.replace(/B//, '')});
            res.send('图片接收成功！');
        } else { //目录创建失败
            res.send('图片接收失败');
        }
    } else {
        res.send('图片接收失败');
    }
});

 thinkjs版：

async uploadAction() {
        let imgData = this.post("image");
        let base64Data = imgData.replace(/^data:image/w+;base64,/, "");
        let dataBuffer = new Buffer(base64Data, 'base64');
        let imgpath = imgutil.getImageUrl("jpg");
        let base64str = new Buffer(dataBuffer).toString('base64'); //图片转字节
        console.log(imgpath);
        let mkJSON = {
            path: imgpath,
            img: base64str,
            encoding: 'utf8'
        };
        let req = think.promisify(request.post);
        let reqObj = {
            url: think.config("makesite"),
            method: "post",
            form: {
                mark: "IMG",
                content: JSON.stringify(mkJSON)
            }
        };
        let rs = await req(reqObj);
        if(rs != undefined && rs.statusCode == 200 && rs.body.indexOf("失败") < 0){
            return this.success(think.config("imgsite")+imgpath);
        }else{
            return this.fail(1,"图片上传出错");
        }
    }