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<a href="../../index.html">all files</a> / <a href="index.html">modules/middleware/</a> methodOverride.js
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<span class="strong">95.45% </span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">const normalizeHeaderName = require("../utils/normalizeHeaderName");
const {is} = require("ramda");
/**
* A middleware that overrides the method of the request to a value that was
* given either in a request parameter or a request header. Can be useful when
* you need to use HTTP methods other than GET and POST with clients that don't
* support them, like web browsers.
*
* For example, you could use the following HTML form:
*
* <form method="POST" action="/">
* <input type="hidden" name="_method" value="PUT">
* </form>
*
* with an app that uses methodOverride:
*
* let app = mach.stack();
* app.use(mach.params);
* app.use(mach.methodOverride);
* app.run(function (request) {
* return request.method; // PUT
* });
*
* Note: When using mach.methodOverride with POST parameters you need to put
* mach.params in front of it so that the request parameters will be available.
*
* Options may be any of the following:
*
* - paramName The name of the request param that contains the
* request method. Defaults to "_method"
* - headerName The name of the HTTP header that will contain the
* request method. This allows you to put the request
* method in an HTTP header instead of a request param.
* Defaults to "X-Http-Method-Override"
*/
function methodOverride(app, options) {
options = options || {};
<span class="missing-if-branch" title="if path not taken" >I</span>if (is(String, options)) {
<span class="cstat-no" title="statement not covered" > options = {paramName: options};</span>
}
const paramName = options.paramName || "_method";
const headerName = normalizeHeaderName(options.headerName || "X-Http-Method-Override");
return function (conn) {
let method;
if (conn.request.headers[headerName]) {
method = conn.request.headers[headerName];
} else if (!conn.params) {
conn.onError(new Error("No params! Use mach.params in front of mach.methodOverride"));
} else <span class="missing-if-branch" title="else path not taken" >E</span>if (conn.params[paramName]) {
method = conn.params[paramName];
// If multiple _method parameters were used, use the last one.
if (Array.isArray(method)) {
method = method[method.length - 1];
}
}
if (method) {
conn.method = method.toUpperCase();
}
return conn.call(app);
};
}
module.exports = methodOverride;
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