Koa2 Request Middle

When request data from remote url, what will you do? Emeded an request module and do it yourself. Fortunately this middle do it for you.

How to use

Easy to use.

npm install koa-request-middle --save

var koa = require("koa");
var RequestMiddle = require("koa-requet-middle");

var app = new koa();
app.use(new RequestMiddle({
	filter: function(proxy, ctx){
		
		return true;
	},
	onBefore: function(proxy, ctx){
		// before fetch from url.
	},
	onAfter: function(proxy, ctx){
		// after fetch from url.
	}
}));
app.listen(8001);

Options

proxy object, a proxy instance all through the middle ware procude, it cantains request information, such as :

{
	protocol: "", // the request protocol
	host: "", // the request host,
	port: 80, // the request port,
	path: "", // the request path,
	query: "", // the request query,
	type: "", // the response body type
	charset: "", // the response body charset.
}

You can use it in the filter/onBefore/onAfter function, and you can change the value to fix your solution.

As you can see, the proxy object don't have the request body. Because i think it is not safe to read body content and in most case, there is not need to read it.

protocol
The protocol to use, default is null, you can change it as you wish. When null, use ctx.protocol.

host
The fetch host, comes from parameter proxy-host or ctx.hostname.

port
The fetch port, comes from parameter proxy-port or ctx.port.

path The fetch path, comes from parameter proxy-path or ctx.path.

query The query object of fetch object, comes from parameter proxy-path and ctx.query with an merge operation.

var options = {
	proxyID: "", // proxy id. default "koa2-request-middle"
	filter: "null | string | function", // the url that matched.
	onBefore: "AsyncFunction|Function",  // do some thing before the fetch.
	onAfter: "AsyncFunction|Function", // do some thing after the fetch.
	useAgent: "String", // user agent.
	cache: "true | false", // whether to use the cache of client.
	ext: "string | Array<String> ", // the type of response body to call the onAfter function. default value is ["txt", "html", "xml", "js", "json"]
}

LICENSE

MIT