implemented onConfig to by pass the request if certain conditions are matched

[cyfung1031]

close #118

Remarks

Since most requests are async, it might not be suitable to do the bypassing in onRequest.
onConfig is synchronously triggered in xhr.open, so it can completely bypass the entire open+setRequestHeader(POST request)+send.

Usage

const { unProxy, originXhr } = proxy({
    onConfig: (config, xhrProxy) => {
        console.log(`url: ${config.url}`)
        if (config.url.indexOf('google.com') >= 0) return false;
    },
    onRequest: (config, handler) => {
        handler.next(config);
    },
    onError: (err, handler) => {
        handler.next(err)
    },
    onResponse: (response, handler) => {
        handler.next(response)
    }
})

[cyfung1031]

Combined Distribution Script ajaxhook.js for Testing (PR 119, 120, 121, 122)
https://cdn.jsdelivr.net/gh/cyfung1031/ajax-hook@1ebe48e08108449669290a226e52fc6fbf7ec9ef/dist/ajaxhook.js

[DAHUIAAAAA]

上面这段代码直接改成这样就可以了:

if (onFilter && onFilter(config)) {
    return;
}

if (onRequest) return true;

可以看到 hookFunction 里面，当函数没有 ret 的时候，就会直接走原生方法：

[DAHUIAAAAA]

改成 onFilter 吧，语义化更好，第二个参数没什么太大用处，可以不传，因为过滤 url 后就可以直接走原生方法了，不用手动调用，切莫过度设计

[cyfung1031]

改了

[DAHUIAAAAA]

新增 api 需要完善一下 markdown 文档

[cyfung1031]

新增 api 需要完善一下 markdown 文档

新增了