FormData上傳文件同時(shí)附帶其他參數(shù),后臺(tái)node接收

wean 發(fā)布于2019-08-22 11:11 / 706人閱讀

摘要：部分，選擇文件為例中上傳文件部分，主要用到的是和告訴不要處理發(fā)送的數(shù)據(jù)告訴不要設(shè)置請(qǐng)求頭失敗后臺(tái)接收部分解析用的是上傳的相關(guān)參數(shù)接收文件觸發(fā)判斷文件類型是否是遍歷上傳文件解析成功解析數(shù)據(jù)文件格式不正確系統(tǒng)錯(cuò)誤上傳出錯(cuò)放棄上傳參考鏈接

1.html部分，選擇文件(excel為例)

2.js中上傳文件部分，主要用到的是jequery和FormData

var formData = new FormData($("#uploadForm")[0]);
formData.append("mapType", "baidu");

$.ajax({
    url: "/upload/order",
    type: "POST",
    data: formData,
    processData: false, //  告訴jquery不要處理發(fā)送的數(shù)據(jù)
    contentType: false // 告訴jquery不要設(shè)置content-Type請(qǐng)求頭
}).done(function (res) {

}).fail(function (res) {
    console.log("失敗");
});

3.后臺(tái)node接收部分,解析excel用的是"node-xlsx"

const express = require("express");
const fs = require("fs");
const formidable = require("formidable");
const xlsx = require("node-xlsx");

const router = express.Router();

router.post("/order", (req, res) => {
    console.log(" ########## POST /upload ####### ");

    let fileTypeError = false;
    const targetPath = `${__dirname}/upload`;
    const form = new formidable.IncomingForm();
    form.encoding = "utf-8";
    form.keepExtensions = true;
    form.maxFieldsSize = 10 * 1024 * 1024;
    form.uploadDir = targetPath;

    const files = [];
    const fields = [];

    let mapType = "gaode";

    form.on("field", (field, value) => { // 上傳的相關(guān)參數(shù)("mapType", "baidu")
        if (field === "mapType")mapType = value;
        fields.push([field, value]);
    });

    form.on("file", (field, file) => { // 接收文件觸發(fā)
        console.log(`upload file: ${file.name}`);
        // 判斷文件類型是否是xlsx
        if (file.type !== "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet") {
            fileTypeError = true;
        }
        files.push([field, file]);
    });
    form.on("end", () => {
        // 遍歷上傳文件
        let fileName = "";
        let obj = "";
        const folderExists = fs.existsSync(targetPath);
        if (folderExists) {
            const dirList = fs.readdirSync(targetPath);
            dirList.forEach(async (item) => {
                if (!fs.statSync(`${targetPath}/${item}`).isDirectory()) {
                    console.log(`parse item:${targetPath}/${item}`);
                    fileName = `${targetPath}/${item}`;
                    if (!fileTypeError) {
                        // 解析excel
                        obj = xlsx.parse(fileName, {
                            cellDates: true
                        });

                        console.log(JSON.stringify(obj));
                        res.send({
                            code: 10000,
                            msg: "成功解析數(shù)據(jù)",
                            resOrders: resOrderObjs
                        });
                    } else {
                        res.send({
                            code: 20003,
                            msg: "文件格式不正確"
                        });
                    }
                    fs.unlinkSync(fileName); // delete file
                }
            });
        } else {
            res.send({
                rtnCode: "1",
                rtnInfo: "系統(tǒng)錯(cuò)誤"
            });
        }
    });
    form.on("error", (err) => {
        res.send({
            rtnCode: "1",
            rtnInfo: "上傳出錯(cuò)"
        });
    });
    form.on("aborted", () => {
        res.send({
            rtnCode: "1",
            rtnInfo: "放棄上傳"
        });
    });
    form.parse(req);
});

參考鏈接：
http://www.cnblogs.com/lyr121...
https://lipeishang.github.io/...