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小程序使用formdata格式传参_微信小程序formdata传参

作者：笔触狂放9 | 2024-05-18 04:34:47

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微信小程序formdata传参

在开发过程中后端要求使用formdata格式传参，试了下发现小程序不能new formData，上网查了查，微信开放社区找到了解决方法，原文之路：使用wx.request发送multipart/form-data请求的方法 | 微信开放社区

下面是我自己的备份，方便我寻找：

  1.  wx.request({
  2.             url: 'https://api.zbgedu.com/api/edu/zbids/student/studentAddToActivity',
  3.             method: 'POST',
  4.             header: {
  5.                 'content-type': 'multipart/form-data; boundary=XXX'
  6.             },
  7.             data: '\r\n--XXX' +
  8.                 '\r\nContent-Disposition: form-data; name="studentId"' +
  9.                 '\r\n' +
  10.                 '\r\n' + params.studentId +
  11.                 '\r\n--XXX' +
  12.                 '\r\nContent-Disposition: form-data; name="activityId"' +
  13.                 '\r\n' +
  14.                 '\r\n' + params.activityId +
  15.                 '\r\n--XXX--',
  16.             success: function (res) {
  17.                 console.log(res, '参加活动接口')
  18.             }
  19.         })

一、场景

        1.业务需求：微信小程序开发需要选择本地照片file连同一些表单数据，通过接口发送给服务器

        2.问题：

            因涉及到域名安全问题以及并不是单独上传图片，不能使用 wx.uploadFile 。
            微信本身没有FormData对象，无法使用 new FormData
            后端接口需要接收一个file, 所以只能想办法，通过wx.request 发送 multipart/form-data 请求

二、解决办法（使用方法）

        1、手动写一个formdata文件，然后引入。

原作者参考微信社区、大神的github，整理出来的formdata.js的用法（就佩服善于整理的人，我有时候都看不懂大神写的什么，谈何整理！！）

  1. request 请求：
  2. 需要文件的 tmp 地址： 大概这样 http://tmp/LGTNvurqcxlNd567041eac6dbc6f255c1a53109b65bf.jpg
  3. formdata.js 文件
  4. mimeMap 文件

 这是原作者的用法

  1. import FormData from './FormData/index.js'
  2.  
  3. // 上传图片
  4. export function uploadFile(newUrl){ // newUrl是本地文件的 tmp 地址 
  5.   let formData = new FormData();
  6.  
  7.   // 用法
  8.   // formData.append("name", "value");      // value 表单值
  9.   // formData.appendFile("file", filepath); // filepath 文件路径
  10.   formData.appendFile("multipartFile", newUrl);
  11.  
  12.   // formData.getData() => { 
  13.   //   buffer:<ArrayBuffer>[], // buffer	表单数据的ArrayBuffer对象 
  14.   //   contentType: string,    // http请求Content-Type头部内容
  15.   // } 
  16.   const data = formData.getData();
  17.  
  18.   return new Promise((resolve,reject)=>{
  19.     wx.request({
  20.       url:"https://xxxxx.xxxxxx.xxxxx/api/img/upload",
  21.       method: 'POST',
  22.       header: {
  23.         'content-type': data.contentType
  24.       },
  25.       data: data.buffer,
  26.       success(res) {
  27.       	if(res.success) console.log("上传成功")
  28.       }
  29.     });
  30.   })
  31. }

因为我的需求是上传多张图片，所以会多一步

  1. import FormData from './FormData/index.js'
  2.  
  3. // 上传图片
  4. export function uploadFile(){ // newUrl是本地文件的 tmp 地址 
  5.   let formdata = new FormData();
  6.   let data={}  //data是要传给服务器的json对象，替换成自己的就行
  7.   for (let i in data) { //这里需要遍历对象，让每一个参数变成formdata格式
  8.     if(i=='files'){ //files是我自定义的要上传的图片数组字段名
  9.        data.files.forEach(filepath=>{ //这里需要每一张遍历一下，就是普通的字符串数组
  10.          formdata.appendFile("files", filepath, "");
  11.        })
  12.     }else{ //这里是其他参数，正常拼接就行
  13.        formdata.append(i,data[i]);
  14.     }
  15.   }
  16.   let newdata = formdata.getData(); //下面的操作都差不多了,注意如果是跟我一样的多文件请求记得把作者下面的拼接注掉
  17.  
  18.   // 用法
  19.   // formData.append("name", "value");      // value 表单值
  20.   // formData.appendFile("file", filepath); // filepath 文件路径
  21.   // formData.appendFile("multipartFile", newUrl); 
  22.  
  23.   // formData.getData() => { 
  24.   //   buffer:<ArrayBuffer>[], // buffer	表单数据的ArrayBuffer对象 
  25.   //   contentType: string,    // http请求Content-Type头部内容
  26.   // } 
  27.   // const data = formData.getData();
  28.  
  29.   return new Promise((resolve,reject)=>{
  30.     wx.request({
  31.       url:"https://xxxxx.xxxxxx.xxxxx/api/img/upload",
  32.       method: 'POST',
  33.       header: {
  34.         'content-type': newdata.contentType
  35.       },
  36.       data: newdata.buffer,
  37.       success(res) {
  38.         //没什么意外的话，应该会请求成功。。看起来简单吧(*^▽^*)
  39.       	if(res.success) console.log("上传成功")
  40.       }
  41.     });
  42.   })
  43. }

千万记得在要用到的js文件中引用，我将formdata.js放在了跟目录下的自己创建的utils文件夹

  1.     wx.request({
  2.       url: URL.signIn,
  3.       method: 'POST',
  4.       header: {
  5.         'content-type': data.contentType,
  6.         'token': wx.getStorageSync("mldz_token")
  7.       },
  8.       data: data.buffer,
  9.       success(res) {
  10.         console.log(res)
  11.       	if(res.success){
  12.           console.log("上传成功")
  13.         } 
  14.       }
  15.     });

三、核心代码（你只需要复制粘贴就可以。。ps：我没动，也没敢动）

  1. formdata.js
  1. import mimeMap from './mimeMap'
  2.  
  3. function FormData(){
  4.   let fileManager = wx.getFileSystemManager();
  5.   let data = {};
  6.   let files = [];
  7.  
  8.   this.append = (name, value)=>{
  9.     data[name] = value;
  10.     return true;
  11.   }
  12.  
  13.   this.appendFile = (name, path)=>{
  14.     let buffer = fileManager.readFileSync(path);
  15.     if(Object.prototype.toString.call(buffer).indexOf("ArrayBuffer") < 0){
  16.       return false;
  17.     }
  18.     files.push({
  19.       name: name,
  20.       buffer: buffer,
  21.       fileName: getFileNameFromPath(path)
  22.     });
  23.     return true;
  24.   }
  25.  
  26.   this.getData = ()=>convert(data, files)
  27. }
  28.  
  29. function getFileNameFromPath(path){
  30.   let idx=path.lastIndexOf("/");
  31.   return path.substr(idx+1);
  32. }
  33.  
  34. function convert(data, files){
  35.   let boundaryKey = 'wxmpFormBoundary' + randString(); // 数据分割符，一般是随机的字符串
  36.   let boundary = '--' + boundaryKey;
  37.   let endBoundary = boundary + '--';
  38.  
  39.   let postArray = [];
  40.   //拼接参数
  41.   if(data && Object.prototype.toString.call(data) == "[object Object]"){
  42.     for(let key in data){
  43.       postArray = postArray.concat(formDataArray(boundary, key, data[key]));
  44.     }
  45.   }
  46.   //拼接文件
  47.   if(files && Object.prototype.toString.call(files) == "[object Array]"){
  48.     for(let i in files){
  49.       let file = files[i];
  50.       postArray = postArray.concat(formDataArray(boundary, file.name, file.buffer, file.fileName));
  51.     }
  52.   }
  53.   //结尾
  54.   let endBoundaryArray = [];
  55.   for (var i = 0; i < endBoundary.length; i++) { // 最后取出结束boundary的charCode
  56.     endBoundaryArray.push(...endBoundary.utf8CodeAt(i));
  57.   }
  58.   postArray = postArray.concat(endBoundaryArray);
  59.   return {
  60.     contentType: 'multipart/form-data; boundary=' + boundaryKey,
  61.     buffer: new Uint8Array(postArray).buffer
  62.   }
  63. }
  64.  
  65. function randString() {
  66.   let res = "";
  67.   for (let i = 0; i < 17; i++) {
  68.     let n = parseInt(Math.random() * 62);
  69.     if (n <= 9) {
  70.       res += n;
  71.     }
  72.     else if (n <= 35) {
  73.       res += String.fromCharCode(n + 55);
  74.     }
  75.     else {
  76.       res += String.fromCharCode(n + 61);
  77.     }
  78.   }
  79.   return res;
  80. }
  81.  
  82. function formDataArray(boundary, name, value, fileName){
  83.   let dataString = '';
  84.   let isFile = !!fileName;
  85.  
  86.   dataString += boundary + '\r\n';
  87.   dataString += 'Content-Disposition: form-data; name="' + name + '"';
  88.   if (isFile){
  89.     dataString += '; filename="' + fileName + '"' + '\r\n';
  90.     dataString += 'Content-Type: ' + getFileMime(fileName) + '\r\n\r\n';
  91.   }
  92.   else{
  93.     dataString += '\r\n\r\n';
  94.     dataString += value;
  95.   }
  96.  
  97.   var dataArray = [];
  98.   for (var i = 0; i < dataString.length; i++) { // 取出文本的charCode（10进制）
  99.     dataArray.push(...dataString.utf8CodeAt(i));
  100.   }
  101.  
  102.   if (isFile) {
  103.     let fileArray = new Uint8Array(value);
  104.     dataArray = dataArray.concat(Array.prototype.slice.call(fileArray));
  105.   }
  106.   dataArray.push(..."\r".utf8CodeAt());
  107.   dataArray.push(..."\n".utf8CodeAt());
  108.  
  109.   return dataArray;
  110. }
  111.  
  112. function getFileMime(fileName){
  113.   let idx = fileName.lastIndexOf(".");
  114.   let mime = mimeMap[fileName.substr(idx)];
  115.   return mime?mime:"application/octet-stream"
  116. }
  117.  
  118. String.prototype.utf8CodeAt = function(i) {
  119.   var str = this;
  120.   var out = [], p = 0;
  121.   var c = str.charCodeAt(i);
  122.   if (c < 128) {
  123.     out[p++] = c;
  124.   } else if (c < 2048) {
  125.     out[p++] = (c >> 6) | 192;
  126.     out[p++] = (c & 63) | 128;
  127.   } else if (
  128.       ((c & 0xFC00) == 0xD800) && (i + 1) < str.length &&
  129.       ((str.charCodeAt(i + 1) & 0xFC00) == 0xDC00)) {
  130.     // Surrogate Pair
  131.     c = 0x10000 + ((c & 0x03FF) << 10) + (str.charCodeAt(++i) & 0x03FF);
  132.     out[p++] = (c >> 18) | 240;
  133.     out[p++] = ((c >> 12) & 63) | 128;
  134.     out[p++] = ((c >> 6) & 63) | 128;
  135.     out[p++] = (c & 63) | 128;
  136.   } else {
  137.     out[p++] = (c >> 12) | 224;
  138.     out[p++] = ((c >> 6) & 63) | 128;
  139.     out[p++] = (c & 63) | 128;
  140.   }
  141.   return out;
  142. };
  143.  
  144.  
  145. export default FormData;

2.mimeMap.js

  1. const mimeMap = {
  2.   "0.001": "application/x-001",
  3.   "0.323": "text/h323",
  4.   "0.907": "drawing/907",
  5.   ".acp": "audio/x-mei-aac",
  6.   ".aif": "audio/aiff",
  7.   ".aiff": "audio/aiff",
  8.   ".asa": "text/asa",
  9.   ".asp": "text/asp",
  10.   ".au": "audio/basic",
  11.   ".awf": "application/vnd.adobe.workflow",
  12.   ".bmp": "application/x-bmp",
  13.   ".c4t": "application/x-c4t",
  14.   ".cal": "application/x-cals",
  15.   ".cdf": "application/x-netcdf",
  16.   ".cel": "application/x-cel",
  17.   ".cg4": "application/x-g4",
  18.   ".cit": "application/x-cit",
  19.   ".cml": "text/xml",
  20.   ".cmx": "application/x-cmx",
  21.   ".crl": "application/pkix-crl",
  22.   ".csi": "application/x-csi",
  23.   ".cut": "application/x-cut",
  24.   ".dbm": "application/x-dbm",
  25.   ".dcd": "text/xml",
  26.   ".der": "application/x-x509-ca-cert",
  27.   ".dib": "application/x-dib",
  28.   ".doc": "application/msword",
  29.   ".drw": "application/x-drw",
  30.   ".dwf": "Model/vnd.dwf",
  31.   ".dwg": "application/x-dwg",
  32.   ".dxf": "application/x-dxf",
  33.   ".emf": "application/x-emf",
  34.   ".ent": "text/xml",
  35.   ".eps": "application/x-ps",
  36.   ".etd": "application/x-ebx",
  37.   ".fax": "image/fax",
  38.   ".fif": "application/fractals",
  39.   ".frm": "application/x-frm",
  40.   ".gbr": "application/x-gbr",
  41.   ".gif": "image/gif",
  42.   ".gp4": "application/x-gp4",
  43.   ".hmr": "application/x-hmr",
  44.   ".hpl": "application/x-hpl",
  45.   ".hrf": "application/x-hrf",
  46.   ".htc": "text/x-component",
  47.   ".html": "text/html",
  48.   ".htx": "text/html",
  49.   ".ico": "image/x-icon",
  50.   ".iff": "application/x-iff",
  51.   ".igs": "application/x-igs",
  52.   ".img": "application/x-img",
  53.   ".isp": "application/x-internet-signup",
  54.   ".java": "java/*",
  55.   ".jpe": "image/jpeg",
  56.   ".jpeg": "image/jpeg",
  57.   ".jpg": "application/x-jpg",
  58.   ".jsp": "text/html",
  59.   ".lar": "application/x-laplayer-reg",
  60.   ".lavs": "audio/x-liquid-secure",
  61.   ".lmsff": "audio/x-la-lms",
  62.   ".ltr": "application/x-ltr",
  63.   ".m2v": "video/x-mpeg",
  64.   ".m4e": "video/mpeg4",
  65.   ".man": "application/x-troff-man",
  66.   ".mdb": "application/msaccess",
  67.   ".mfp": "application/x-shockwave-flash",
  68.   ".mhtml": "message/rfc822",
  69.   ".mid": "audio/mid",
  70.   ".mil": "application/x-mil",
  71.   ".mnd": "audio/x-musicnet-download",
  72.   ".mocha": "application/x-javascript",
  73.   ".mp1": "audio/mp1",
  74.   ".mp2v": "video/mpeg",
  75.   ".mp4": "video/mpeg4",
  76.   ".mpd": "application/vnd.ms-project",
  77.   ".mpeg": "video/mpg",
  78.   ".mpga": "audio/rn-mpeg",
  79.   ".mps": "video/x-mpeg",
  80.   ".mpv": "video/mpg",
  81.   ".mpw": "application/vnd.ms-project",
  82.   ".mtx": "text/xml",
  83.   ".net": "image/pnetvue",
  84.   ".nws": "message/rfc822",
  85.   ".out": "application/x-out",
  86.   ".p12": "application/x-pkcs12",
  87.   ".p7c": "application/pkcs7-mime",
  88.   ".p7r": "application/x-pkcs7-certreqresp",
  89.   ".pc5": "application/x-pc5",
  90.   ".pcl": "application/x-pcl",
  91.   ".pdf": "application/pdf",
  92.   ".pdx": "application/vnd.adobe.pdx",
  93.   ".pgl": "application/x-pgl",
  94.   ".pko": "application/vnd.ms-pki.pko",
  95.   ".plg": "text/html",
  96.   ".plt": "application/x-plt",
  97.   ".png": "application/x-png",
  98.   ".ppa": "application/vnd.ms-powerpoint",
  99.   ".pps": "application/vnd.ms-powerpoint",
  100.   ".ppt": "application/x-ppt",
  101.   ".prf": "application/pics-rules",
  102.   ".prt": "application/x-prt",
  103.   ".ps": "application/postscript",
  104.   ".pwz": "application/vnd.ms-powerpoint",
  105.   ".ra": "audio/vnd.rn-realaudio",
  106.   ".ras": "application/x-ras",
  107.   ".rdf": "text/xml",
  108.   ".red": "application/x-red",
  109.   ".rjs": "application/vnd.rn-realsystem-rjs",
  110.   ".rlc": "application/x-rlc",
  111.   ".rm": "application/vnd.rn-realmedia",
  112.   ".rmi": "audio/mid",
  113.   ".rmm": "audio/x-pn-realaudio",
  114.   ".rms": "application/vnd.rn-realmedia-secure",
  115.   ".rmx": "application/vnd.rn-realsystem-rmx",
  116.   ".rp": "image/vnd.rn-realpix",
  117.   ".rsml": "application/vnd.rn-rsml",
  118.   ".rtf": "application/msword",
  119.   ".rv": "video/vnd.rn-realvideo",
  120.   ".sat": "application/x-sat",
  121.   ".sdw": "application/x-sdw",
  122.   ".slb": "application/x-slb",
  123.   ".slk": "drawing/x-slk",
  124.   ".smil": "application/smil",
  125.   ".snd": "audio/basic",
  126.   ".sor": "text/plain",
  127.   ".spl": "application/futuresplash",
  128.   ".ssm": "application/streamingmedia",
  129.   ".stl": "application/vnd.ms-pki.stl",
  130.   ".sty": "application/x-sty",
  131.   ".swf": "application/x-shockwave-flash",
  132.   ".tg4": "application/x-tg4",
  133.   ".tif": "image/tiff",
  134.   ".tiff": "image/tiff",
  135.   ".top": "drawing/x-top",
  136.   ".tsd": "text/xml",
  137.   ".uin": "application/x-icq",
  138.   ".vcf": "text/x-vcard",
  139.   ".vdx": "application/vnd.visio",
  140.   ".vpg": "application/x-vpeg005",
  141.   ".vsd": "application/x-vsd",
  142.   ".vst": "application/vnd.visio",
  143.   ".vsw": "application/vnd.visio",
  144.   ".vtx": "application/vnd.visio",
  145.   ".wav": "audio/wav",
  146.   ".wb1": "application/x-wb1",
  147.   ".wb3": "application/x-wb3",
  148.   ".wiz": "application/msword",
  149.   ".wk4": "application/x-wk4",
  150.   ".wks": "application/x-wks",
  151.   ".wma": "audio/x-ms-wma",
  152.   ".wmf": "application/x-wmf",
  153.   ".wmv": "video/x-ms-wmv",
  154.   ".wmz": "application/x-ms-wmz",
  155.   ".wpd": "application/x-wpd",
  156.   ".wpl": "application/vnd.ms-wpl",
  157.   ".wr1": "application/x-wr1",
  158.   ".wrk": "application/x-wrk",
  159.   ".ws2": "application/x-ws",
  160.   ".wsdl": "text/xml",
  161.   ".xdp": "application/vnd.adobe.xdp",
  162.   ".xfd": "application/vnd.adobe.xfd",
  163.   ".xhtml": "text/html",
  164.   ".xls": "application/x-xls",
  165.   ".xml": "text/xml",
  166.   ".xq": "text/xml",
  167.   ".xquery": "text/xml",
  168.   ".xsl": "text/xml",
  169.   ".xwd": "application/x-xwd",
  170.   ".sis": "application/vnd.symbian.install",
  171.   ".x_t": "application/x-x_t",
  172.   ".apk": "application/vnd.android.package-archive",
  173.   "0.301": "application/x-301",
  174.   "0.906": "application/x-906",
  175.   ".a11": "application/x-a11",
  176.   ".ai": "application/postscript",
  177.   ".aifc": "audio/aiff",
  178.   ".anv": "application/x-anv",
  179.   ".asf": "video/x-ms-asf",
  180.   ".asx": "video/x-ms-asf",
  181.   ".avi": "video/avi",
  182.   ".biz": "text/xml",
  183.   ".bot": "application/x-bot",
  184.   ".c90": "application/x-c90",
  185.   ".cat": "application/vnd.ms-pki.seccat",
  186.   ".cdr": "application/x-cdr",
  187.   ".cer": "application/x-x509-ca-cert",
  188.   ".cgm": "application/x-cgm",
  189.   ".class": "java/*",
  190.   ".cmp": "application/x-cmp",
  191.   ".cot": "application/x-cot",
  192.   ".crt": "application/x-x509-ca-cert",
  193.   ".css": "text/css",
  194.   ".dbf": "application/x-dbf",
  195.   ".dbx": "application/x-dbx",
  196.   ".dcx": "application/x-dcx",
  197.   ".dgn": "application/x-dgn",
  198.   ".dll": "application/x-msdownload",
  199.   ".dot": "application/msword",
  200.   ".dtd": "text/xml",
  201.   ".dwf": "application/x-dwf",
  202.   ".dxb": "application/x-dxb",
  203.   ".edn": "application/vnd.adobe.edn",
  204.   ".eml": "message/rfc822",
  205.   ".epi": "application/x-epi",
  206.   ".eps": "application/postscript",
  207.   ".exe": "application/x-msdownload",
  208.   ".fdf": "application/vnd.fdf",
  209.   ".fo": "text/xml",
  210.   ".g4": "application/x-g4",
  211.   ".tif": "image/tiff",
  212.   ".gl2": "application/x-gl2",
  213.   ".hgl": "application/x-hgl",
  214.   ".hpg": "application/x-hpgl",
  215.   ".hqx": "application/mac-binhex40",
  216.   ".hta": "application/hta",
  217.   ".htm": "text/html",
  218.   ".htt": "text/webviewhtml",
  219.   ".icb": "application/x-icb",
  220.   ".ico": "application/x-ico",
  221.   ".ig4": "application/x-g4",
  222.   ".iii": "application/x-iphone",
  223.   ".ins": "application/x-internet-signup",
  224.   ".IVF": "video/x-ivf",
  225.   ".jfif": "image/jpeg",
  226.   ".jpe": "application/x-jpe",
  227.   ".jpg": "image/jpeg",
  228.   ".js": "application/x-javascript",
  229.   ".la1": "audio/x-liquid-file",
  230.   ".latex": "application/x-latex",
  231.   ".lbm": "application/x-lbm",
  232.   ".ls": "application/x-javascript",
  233.   ".m1v": "video/x-mpeg",
  234.   ".m3u": "audio/mpegurl",
  235.   ".mac": "application/x-mac",
  236.   ".math": "text/xml",
  237.   ".mdb": "application/x-mdb",
  238.   ".mht": "message/rfc822",
  239.   ".mi": "application/x-mi",
  240.   ".midi": "audio/mid",
  241.   ".mml": "text/xml",
  242.   ".mns": "audio/x-musicnet-stream",
  243.   ".movie": "video/x-sgi-movie",
  244.   ".mp2": "audio/mp2",
  245.   ".mp3": "audio/mp3",
  246.   ".mpa": "video/x-mpg",
  247.   ".mpe": "video/x-mpeg",
  248.   ".mpg": "video/mpg",
  249.   ".mpp": "application/vnd.ms-project",
  250.   ".mpt": "application/vnd.ms-project",
  251.   ".mpv2": "video/mpeg",
  252.   ".mpx": "application/vnd.ms-project",
  253.   ".mxp": "application/x-mmxp",
  254.   ".nrf": "application/x-nrf",
  255.   ".odc": "text/x-ms-odc",
  256.   ".p10": "application/pkcs10",
  257.   ".p7b": "application/x-pkcs7-certificates",
  258.   ".p7m": "application/pkcs7-mime",
  259.   ".p7s": "application/pkcs7-signature",
  260.   ".pci": "application/x-pci",
  261.   ".pcx": "application/x-pcx",
  262.   ".pdf": "application/pdf",
  263.   ".pfx": "application/x-pkcs12",
  264.   ".pic": "application/x-pic",
  265.   ".pl": "application/x-perl",
  266.   ".pls": "audio/scpls",
  267.   ".png": "image/png",
  268.   ".pot": "application/vnd.ms-powerpoint",
  269.   ".ppm": "application/x-ppm",
  270.   ".ppt": "application/vnd.ms-powerpoint",
  271.   ".pr": "application/x-pr",
  272.   ".prn": "application/x-prn",
  273.   ".ps": "application/x-ps",
  274.   ".ptn": "application/x-ptn",
  275.   ".r3t": "text/vnd.rn-realtext3d",
  276.   ".ram": "audio/x-pn-realaudio",
  277.   ".rat": "application/rat-file",
  278.   ".rec": "application/vnd.rn-recording",
  279.   ".rgb": "application/x-rgb",
  280.   ".rjt": "application/vnd.rn-realsystem-rjt",
  281.   ".rle": "application/x-rle",
  282.   ".rmf": "application/vnd.adobe.rmf",
  283.   ".rmj": "application/vnd.rn-realsystem-rmj",
  284.   ".rmp": "application/vnd.rn-rn_music_package",
  285.   ".rmvb": "application/vnd.rn-realmedia-vbr",
  286.   ".rnx": "application/vnd.rn-realplayer",
  287.   ".rpm": "audio/x-pn-realaudio-plugin",
  288.   ".rt": "text/vnd.rn-realtext",
  289.   ".rtf": "application/x-rtf",
  290.   ".sam": "application/x-sam",
  291.   ".sdp": "application/sdp",
  292.   ".sit": "application/x-stuffit",
  293.   ".sld": "application/x-sld",
  294.   ".smi": "application/smil",
  295.   ".smk": "application/x-smk",
  296.   ".sol": "text/plain",
  297.   ".spc": "application/x-pkcs7-certificates",
  298.   ".spp": "text/xml",
  299.   ".sst": "application/vnd.ms-pki.certstore",
  300.   ".stm": "text/html",
  301.   ".svg": "text/xml",
  302.   ".tdf": "application/x-tdf",
  303.   ".tga": "application/x-tga",
  304.   ".tif": "application/x-tif",
  305.   ".tld": "text/xml",
  306.   ".torrent": "application/x-bittorrent",
  307.   ".txt": "text/plain",
  308.   ".uls": "text/iuls",
  309.   ".vda": "application/x-vda",
  310.   ".vml": "text/xml",
  311.   ".vsd": "application/vnd.visio",
  312.   ".vss": "application/vnd.visio",
  313.   ".vst": "application/x-vst",
  314.   ".vsx": "application/vnd.visio",
  315.   ".vxml": "text/xml",
  316.   ".wax": "audio/x-ms-wax",
  317.   ".wb2": "application/x-wb2",
  318.   ".wbmp": "image/vnd.wap.wbmp",
  319.   ".wk3": "application/x-wk3",
  320.   ".wkq": "application/x-wkq",
  321.   ".wm": "video/x-ms-wm",
  322.   ".wmd": "application/x-ms-wmd",
  323.   ".wml": "text/vnd.wap.wml",
  324.   ".wmx": "video/x-ms-wmx",
  325.   ".wp6": "application/x-wp6",
  326.   ".wpg": "application/x-wpg",
  327.   ".wq1": "application/x-wq1",
  328.   ".wri": "application/x-wri",
  329.   ".ws": "application/x-ws",
  330.   ".wsc": "text/scriptlet",
  331.   ".wvx": "video/x-ms-wvx",
  332.   ".xdr": "text/xml",
  333.   ".xfdf": "application/vnd.adobe.xfdf",
  334.   ".xls": "application/vnd.ms-excel",
  335.   ".xlw": "application/x-xlw",
  336.   ".xpl": "audio/scpls",
  337.   ".xql": "text/xml",
  338.   ".xsd": "text/xml",
  339.   ".xslt": "text/xml",
  340.   ".x_b": "application/x-x_b",
  341.   ".sisx": "application/vnd.symbian.install",
  342.   ".ipa": "application/vnd.iphone",
  343.   ".xap": "application/x-silverlight-app",
  344.   ".zip": "application/x-zip-compressed",
  345. }
  346. export default mimeMap;

注意：因源码无法直接在项目中使用，本文代码在源码的基础上完善了一些改动的基础上完善了一些改动（不出意外的话应该是可以直接使用的，如果不行的话在一起探讨咯）。
如果本文代码无法满足您的需求，还请移步去看一下源码 github https://github.com/zlyboy/wx-formdata

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