{"id":6280,"date":"2025-06-02T13:58:31","date_gmt":"2025-06-04T06:39:30","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=6280"},"modified":"2025-06-04T13:58:31","modified_gmt":"2025-06-04T06:39:30","slug":"%e4%ba%86%e8%a7%a3node-js%e4%b8%ad%e4%bd%bf%e7%94%a8multer%e9%80%b2%e8%a1%8c%e6%96%87%e4%bb%b6%e4%b8%8a%e5%82%b3%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/node-js\/%e4%ba%86%e8%a7%a3node-js%e4%b8%ad%e4%bd%bf%e7%94%a8multer%e9%80%b2%e8%a1%8c%e6%96%87%e4%bb%b6%e4%b8%8a%e5%82%b3%e7%9a%84%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u4f7f\u7528 Multer \u5728 Node.js \u4e2d\u9032\u884c\u9ad8\u6548\u6587\u4ef6\u4e0a\u50b3\uff1a\u5b8c\u6574\u6559\u5b78\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

\u5982\u4f55\u5728 Node.js \u4e2d\u4f7f\u7528 Multer \u9032\u884c\u9ad8\u6548\u6587\u4ef6\u4e0a\u50b3\uff1f<\/h1>\n

Node.js \u662f\u4e00\u500b\u5ee3\u53d7\u6b61\u8fce\u7684 JavaScript \u74b0\u5883\uff0c\u7528\u65bc\u958b\u767c\u5404\u985e\u61c9\u7528\u7a0b\u5f0f\uff0c\u5305\u62ec\u6587\u4ef6\u4e0a\u50b3\u61c9\u7528\u7a0b\u5f0f\u3002Multer \u662f\u4e00\u500b\u5f37\u5927\u7684 Node.js \u4e2d\u9593\u4ef6\uff0c\u5c08\u9580\u7528\u65bc\u8655\u7406\u6587\u4ef6\u4e0a\u50b3\u3002\u672c\u6587\u5c07\u70ba\u60a8\u63d0\u4f9b 2025 \u6700\u65b0\u7684\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u5be6\u73fe\u6587\u4ef6\u4e0a\u50b3\u529f\u80fd\u3002<\/p>\n

\u5b89\u88dd Multer<\/h2>\n

\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5b89\u88dd Multer\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u9032\u884c\u5b89\u88dd\uff1a<\/p>\n

“`bash
\nnpm install multer
\n“`<\/p>\n

\u9019\u689d\u547d\u4ee4\u5c07\u6703\u5728\u60a8\u7684 Node.js \u5c08\u6848\u4e2d\u5b89\u88dd Multer \u4e2d\u9593\u4ef6\uff0c\u8b93\u60a8\u80fd\u5920\u65b9\u4fbf\u5730\u8655\u7406\u6587\u4ef6\u4e0a\u50b3\u3002<\/p>\n

\u5efa\u7acb\u6587\u4ef6\u4e0a\u50b3\u8def\u7531<\/h2>\n

\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u5efa\u7acb\u4e00\u500b\u6587\u4ef6\u4e0a\u50b3\u8def\u7531\uff0c\u4ee5\u4fbf\u63a5\u6536\u6587\u4ef6\u4e0a\u50b3\u8acb\u6c42\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Express \u6846\u67b6\u5efa\u7acb\u8def\u7531\u7684\u7bc4\u4f8b\uff1a<\/p>\n

“`javascript
\nconst express = require(‘express’);
\nconst router = express.Router();<\/p>\n

router.post(‘\/upload’, (req, res) => {
\n \/\/ \u8655\u7406\u6587\u4ef6\u4e0a\u50b3
\n res.send(‘\u6587\u4ef6\u4e0a\u50b3\u6210\u529f’);
\n});<\/p>\n

module.exports = router;
\n“`<\/p>\n

\u5728\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5efa\u7acb\u4e86\u4e00\u500b POST \u8def\u7531 `\/upload`\uff0c\u7528\u65bc\u63a5\u6536\u6587\u4ef6\u4e0a\u50b3\u8acb\u6c42\u3002<\/p>\n

\u4f7f\u7528 Multer \u8655\u7406\u6587\u4ef6\u4e0a\u50b3<\/h2>\n

\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 Multer \u4f86\u8655\u7406\u6587\u4ef6\u4e0a\u50b3\u8acb\u6c42\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u9032\u884c\u7684\u7bc4\u4f8b\uff1a<\/p>\n

“`javascript
\nconst multer = require(‘multer’);<\/p>\n

\/\/ \u8a2d\u5b9a\u6587\u4ef6\u4e0a\u50b3\u7684\u5132\u5b58\u4f4d\u7f6e
\nconst storage = multer.diskStorage({
\n destination: function (req, file, cb) {
\n cb(null, ‘uploads\/’);
\n },
\n filename: function (req, file, cb) {
\n cb(null, Date.now() + ‘-‘ + file.originalname); \/\/ \u4f7f\u7528\u6642\u9593\u6233\u4f5c\u70ba\u6587\u4ef6\u540d\u7a31
\n }
\n});<\/p>\n

const upload = multer({ storage: storage });<\/p>\n

router.post(‘\/upload’, upload.single(‘file’), (req, res) => {
\n \/\/ \u7372\u53d6\u4e0a\u50b3\u6587\u4ef6\u7684\u8a73\u7d30\u4fe1\u606f
\n const file = req.file;
\n if (!file) {
\n return res.status(400).send(‘\u6c92\u6709\u4e0a\u50b3\u7684\u6587\u4ef6’);
\n }
\n console.log(file);
\n res.send(‘\u6587\u4ef6\u4e0a\u50b3\u6210\u529f\uff0c\u6587\u4ef6\u540d\u7a31\uff1a’ + file.filename);
\n});
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 `multer.diskStorage` \u8a2d\u5b9a\u4e86\u6587\u4ef6\u7684\u5132\u5b58\u4f4d\u7f6e\u548c\u6587\u4ef6\u540d\u7a31\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6587\u4ef6\u540d\u7a31\u91cd\u8907\uff0c\u4e26\u5c07\u6587\u4ef6\u5b58\u5132\u5230\u6307\u5b9a\u7684\u8def\u5f91\u3002<\/p>\n

\u7372\u53d6\u4e0a\u50b3\u6587\u4ef6\u7684\u8a73\u7d30\u4fe1\u606f<\/h2>\n

\u7576\u6587\u4ef6\u4e0a\u50b3\u6210\u529f\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 `req.file` \u4f86\u7372\u53d6\u4e0a\u50b3\u6587\u4ef6\u7684\u8a73\u7d30\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u7372\u53d6\u9019\u4e9b\u4fe1\u606f\u7684\u7bc4\u4f8b\uff1a<\/p>\n

“`javascript
\nrouter.post(‘\/upload’, upload.single(‘file’), (req, res) => {
\n const file = req.file;
\n if (!file) {
\n return res.status(400).send(‘\u6c92\u6709\u4e0a\u50b3\u7684\u6587\u4ef6’);
\n }
\n console.log(file);
\n res.send(‘\u6587\u4ef6\u4e0a\u50b3\u6210\u529f\uff0c\u6587\u4ef6\u540d\u7a31\uff1a’ + file.filename);
\n});
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u6aa2\u67e5\u4e86\u662f\u5426\u6709\u6587\u4ef6\u4e0a\u50b3\uff0c\u5982\u679c\u6c92\u6709\uff0c\u5247\u8fd4\u56de\u932f\u8aa4\u4fe1\u606f\u3002<\/p>\n

\u932f\u8aa4\u8655\u7406<\/h2>\n

\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u60a8\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u4f8b\u5982\u6587\u4ef6\u683c\u5f0f\u4e0d\u6b63\u78ba\u6216\u6587\u4ef6\u5927\u5c0f\u8d85\u904e\u9650\u5236\u3002\u60a8\u53ef\u4ee5\u5728 Multer \u914d\u7f6e\u4e2d\u589e\u52a0\u6aa2\u67e5\u689d\u4ef6\uff0c\u6bd4\u5982\uff1a<\/p>\n

“`javascript
\nconst upload = multer({
\n storage: storage,
\n limits: { fileSize: 1 * 1024 * 1024 }, \/\/ \u9650\u5236\u6587\u4ef6\u5927\u5c0f\u70ba 1MB
\n fileFilter: (req, file, cb) => {
\n const filetypes = \/jpeg|jpg|png|gif\/; \/\/ \u9650\u5236\u6587\u4ef6\u683c\u5f0f
\n const mimetype = filetypes.test(file.mimetype);
\n if (mimetype) {
\n return cb(null, true);
\n }
\n cb(new Error(‘\u53ea\u652f\u6301\u5716\u7247\u683c\u5f0f!’));
\n }
\n});
\n“`<\/p>\n

\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u904e\u6ffe\u6389\u4e0d\u7b26\u5408\u689d\u4ef6\u7684\u6587\u4ef6\uff0c\u63d0\u5347\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528<\/h2>\n

\u9664\u4e86\u57fa\u672c\u7684\u6587\u4ef6\u4e0a\u50b3\u5916\uff0c\u60a8\u9084\u53ef\u4ee5\u8003\u616e\u5c07\u4e0a\u50b3\u7684\u6587\u4ef6\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u6216\u662f\u9032\u884c\u9032\u4e00\u6b65\u7684\u8655\u7406\uff0c\u4f8b\u5982\u58d3\u7e2e\u3001\u8f49\u78bc\u7b49\u3002\u9019\u4e9b\u529f\u80fd\u53ef\u4ee5\u63d0\u9ad8\u60a8\u7684\u61c9\u7528\u6548\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 Multer \u9032\u884c\u6587\u4ef6\u4e0a\u50b3\uff0c\u5f9e\u5b89\u88dd\u3001\u8def\u7531\u8a2d\u7f6e\u5230\u8655\u7406\u6587\u4ef6\u4e0a\u50b3\u8acb\u6c42\u3002\u6211\u5011\u9084\u6db5\u84cb\u4e86\u932f\u8aa4\u8655\u7406\u548c\u5ef6\u4f38\u61c9\u7528\u7684\u90e8\u5206\u3002Multer \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684 Node.js \u4e2d\u9593\u4ef6\uff0c\u8b93\u60a8\u80fd\u5920\u8f15\u9b06\u8655\u7406\u6587\u4ef6\u4e0a\u50b3\u8acb\u6c42\u3002\u5982\u679c\u60a8\u6b63\u5728\u958b\u767c\u6587\u4ef6\u4e0a\u50b3\u61c9\u7528\u7a0b\u5f0f\uff0cMulter \u503c\u5f97\u60a8\u8003\u616e\u3002<\/p>\n

\u5982\u679c\u60a8\u60f3\u6df1\u5165\u4e86\u89e3\u66f4\u591a Node.js \u7684\u61c9\u7528\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u8acb\u53c3\u8003\u6211\u5011\u7684 [Node.js \u6559\u5b78\u6587](https:\/\/vocus.cc)\uff01<\/p>\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

**Q1: Multer \u652f\u6301\u54ea\u4e9b\u6587\u4ef6\u683c\u5f0f\u7684\u4e0a\u50b3\uff1f**
\nA1: Multer \u652f\u6301\u591a\u7a2e\u6587\u4ef6\u683c\u5f0f\u7684\u4e0a\u50b3\uff0c\u60a8\u53ef\u4ee5\u901a\u904e\u8a2d\u5b9a `fileFilter` \u4f86\u9650\u5236\u5141\u8a31\u7684\u6587\u4ef6\u683c\u5f0f\u3002<\/p>\n

**Q2: \u5982\u4f55\u8655\u7406\u6587\u4ef6\u4e0a\u50b3\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\uff1f**
\nA2: \u60a8\u53ef\u4ee5\u5728 Multer \u7684\u914d\u7f6e\u4e2d\u4f7f\u7528 `limits` \u548c `fileFilter` \u4f86\u8655\u7406\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u4f8b\u5982\u6587\u4ef6\u5927\u5c0f\u9650\u5236\u548c\u6587\u4ef6\u683c\u5f0f\u4e0d\u6b63\u78ba\u3002<\/p>\n

**Q3: \u5982\u4f55\u7372\u53d6\u4e0a\u50b3\u6587\u4ef6\u7684\u8a73\u7d30\u4fe1\u606f\uff1f**
\nA3: \u7576\u4e0a\u50b3\u6210\u529f\u5f8c\uff0c\u53ef\u4ee5\u900f\u904e `req.file` \u7372\u53d6\u4e0a\u50b3\u6587\u4ef6\u7684\u8a73\u7d30\u4fe1\u606f\uff0c\u5305\u62ec\u6587\u4ef6\u540d\u3001\u5927\u5c0f\u548c MIME \u985e\u578b\u7b49\u3002<\/p>\n

—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6458\u8981:\u5728Node.js\u4e2d\uff0cMulter\u662f\u4e00\u500b\u7528\u65bc\u8655\u7406multipart\/form-data\u7684\u4e2d\u9593\u4ef6\uff0c\u53ef\u4ee5\u7528\u65bc\u6587\u4ef6\u4e0a\u50b3\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728Node.js\u4e2d\u4f7f\u7528Multer\u9032\u884c\u6587\u4ef6\u4e0a\u50b3\uff0c\u4ee5\u53ca\u5982\u4f55\u8655\u7406\u4e0a\u50b3\u7684\u6587\u4ef6\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[193,192],"tags":[191,190],"class_list":["post-6280","post","type-post","status-publish","format-standard","hentry","category-node","category-node-js","tag-node","tag-node-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1Di","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6280","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=6280"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6280\/revisions"}],"predecessor-version":[{"id":6281,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6280\/revisions\/6281"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=6280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=6280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=6280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}