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<a href="../../index.html">all files</a> / <a href="index.html">modules/middleware/</a> catch.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* A middleware that "catches" non-Errors that are thrown from the downstream
* app and returns them instead. This can be useful for breaking out of a
* nested promise chain, for example.
*
* Example:
*
* mach.catch(function (conn) {
* throw 200;
* });
*/
const {is} = require("ramda");
function catchError(app) {
return function (conn) {
return conn.call(app).then(undefined, function (reason) {
if (is(Error, reason)) {
throw reason;
}
return reason;
});
};
}
module.exports = catchError;
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Code coverage
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