增强proxy: 对齐webpack devServer的proxy

[zuoxue0119]

#2868

增强proxy, 对齐 webpack devServer的proxy
支持proxy数组与 http-proxy-middleware中所有格式的context， 例如

proxy: [
      {
        context: '/ajax',
        target: 'https://localhost:3000',
      },
      {
        context: function (pathname, req) {
          const env = getPathnameEnv(pathname);
          return env === 'online';
        },
        target: 'https://localhost:8081',
        changeOrigin: true,
      },
]

[LukeTully]

Was about to make the exact same change. For further explanation, this uses http-proxy-middleware's matching method instead of the standard regex match because http-proxy-middleware accounts for slightly differing syntax when matching contexts. Wildcards such as /**/api.js don't currently work in vue-cli's abstraction of devServer's proxy because of this, and do work with this change applied. Glob syntax, according to #2947 was still not working, but that issue has been closed. @dousybox Could you speak to this at all?

[dousybox]

Was about to make the exact same change. For further explanation, this uses http-proxy-middleware's matching method instead of the standard regex match because http-proxy-middleware accounts for slightly differing syntax when matching contexts. Wildcards such as /**/api.js don't currently work in vue-cli's abstraction of devServer's proxy because of this, and do work with this change applied. Glob syntax, according to #2947 was still not working, but that issue has been closed. @dousybox Could you speak to this at all?

@LukeTully

I am very sorry, I only discovered that I was mentioned here.

I closed #2947 just because I was think I found the most most relative PR for my issue at that time.

But seems I was wrong, this PR is a little off track of the Commit Message Convention.

So I tried to deepin with this problem and I find #2320.

When I debugged the srouce code of http-proxy-middleware and vue-cli, I came to a conclusion here: #2320 (comment).

But I still have no idea why vue-cli need to forced handle the context match, so I still waitting for someone to resolve this issue.

[kayoch1n]

2022年了，这个特性还有可能加入么？