blackbird-server
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HTTP for JavaScript
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<title>Code coverage report for blackbird/modules/middleware/proxy.js</title>
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<h1>
<a href="../../../index.html">all files</a> / <a href="index.html">blackbird/modules/middleware/</a> proxy.js
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<span class="strong">82.61% </span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/* */
const Location = require("../Location");
const createProxy = require("../utils/createProxy");
const isRegExp = require("../utils/isRegExp");
const {is} = require("ramda");
function returnTrue() {
return true;
}
/**
* A middleware that forwards requests that pass the given test function
* to the given target. If the target is not an app, it should be a string
* or options hash that is used to create a proxy.
*
* Example:
*
* let mach = require('mach');
* let app = mach.stack();
*
* // Forward all requests to example.com.
* app.use(mach.proxy, 'http://www.example.com');
*
* // Forward all requests that match "/images/*.jpg" to S3.
* app.use(mach.proxy, 'http://s3.amazon.com/my-bucket', /\/images/*.jpg/);
*
* mach.serve(app);
*/
function proxy(app, target, test) {
test = test || returnTrue;
if (isRegExp(test)) {
const pattern = test;
test = function (conn) {
return pattern.test(conn.href);
};
} else <span class="missing-if-branch" title="if path not taken" >I</span>if (!is(Function, test)) {
<span class="cstat-no" title="statement not covered" > throw new Error("mach.proxy needs a test function");</span>
}
let targetApp;
<span class="missing-if-branch" title="else path not taken" >E</span>if (is(Function, target)) {
targetApp = target;
} else <span class="cstat-no" title="statement not covered" >if (is(String, target) || is(Location, target)) {</span>
<span class="cstat-no" title="statement not covered" > targetApp = createProxy(target);</span>
} else {
<span class="cstat-no" title="statement not covered" > throw new Error("mach.proxy needs a target app");</span>
}
return function (conn) {
return conn.run(test(conn) ? targetApp : app);
};
}
module.exports = proxy;
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