🐞 fix(web-server): 修改proxy解决mid-web内存泄漏

web-server/app/middleware/egg-proxy.ts

@@ -0,0 +1,50 @@
+import c2k = require('koa-connect');
+import { createProxyMiddleware, Options as ContextOptions } from 'http-proxy-middleware';
+import * as micromatch from 'micromatch';
+import * as isGlob from 'is-glob';
+
+function match(context: string, path: string): boolean {
+  // single path
+  if (!isGlob(context)) {
+    return path.indexOf(context) === 0;
+  } else {
+    // single glob path
+    const matches = micromatch([path], context);
+    return matches?.length > 0;
+  }
+}
+
+export interface Options {
+  [contextName: string]: ContextOptions;
+}
+
+export default function (options: Options) {
+  return async (ctx, next) => {
+    for (const context of Object.keys(options)) {
+      if (match(context, ctx.path)) {
+        const contextOptions: ContextOptions = options[context];
+        const { onProxyReq } = contextOptions;
+        await c2k(
+          createProxyMiddleware(context, {
+            ...contextOptions,
+            onProxyReq(proxyReq, req, res) {
+              if (onProxyReq && typeof onProxyReq === 'function') {
+                onProxyReq(proxyReq, req, res);
+              }
+              // reset rawBody after bodyparser
+              const { rawBody, body: requestBody } = ctx.request;
+              if (requestBody && rawBody) {
+                proxyReq.setHeader('Content-Length', Buffer.byteLength(rawBody));
+                proxyReq.write(rawBody);
+                proxyReq.end();
+              }
+              return proxyReq;
+            },
+          }) as any
+        )(ctx, next);
+      }
+    }
+    await next();
+  };
+}
+