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http-proxy-rules
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http-proxy-rules
is an add-on module to the node-http-proxy library. It lets you define a set of rules to translate matching routes to target routes that the reverse proxy service will talk to on the client's behalf.
npm install http-proxy-rules --save
var http = require('http'),
httpProxy = require('http-proxy'),
HttpProxyRules = require('http-proxy-rules');
// Set up proxy rules instance
var proxyRules = new HttpProxyRules({
rules: {
'.*/test': 'http://localhost:8080/cool', // Rule (1)
'.*/test2/': 'http://localhost:8080/cool2/', // Rule (2)
'/posts/([0-9]+)/comments/([0-9]+)': 'http://localhost:8080/p/$1/c/$2', // Rule (3)
'/author/([0-9]+)/posts/([0-9]+)/': 'http://localhost:8080/a/$1/p/$2/' // Rule (4)
},
default: 'http://localhost:8080' // default target
});
// Create reverse proxy instance
var proxy = httpProxy.createProxy();
// Create http server that leverages reverse proxy instance
// and proxy rules to proxy requests to different targets
http.createServer(function(req, res) {
// a match method is exposed on the proxy rules instance
// to test a request to see if it matches against one of the specified rules
var target = proxyRules.match(req);
if (target) {
return proxy.web(req, res, {
target: target
});
}
res.writeHead(500, { 'Content-Type': 'text/plain' });
res.end('The request url and path did not match any of the listed rules!');
}).listen(6010, cb);
Given the object we used to initialize the HttpProxyRules
instance above, here are some examples of how sample url paths would be translated.
You can initialize a new http-proxy-rules
instance with the following options:
{
rules: {}, // See notes below
default: '' // (optional) if no rules matched, translate url path to specified default
}
The rules object contains a set of key-value pairs mapping a regex-supported url path to a target route. The module only tries to match the visited url path, and not the entire url, with a specified rule. The target route must include the protocol (e.g., http) and the FQDN. You can use capturing groups when constructing a rule key (e.g. '/posts/(\d+)/
). In this case, $1
in the target path will be replaced with the value from the first capturing group, $2
with the second one, and so on. See the tests for examples of how incoming route url paths may be translated with the use of this module.
(?:\\W|$)
is appended to the end of the regex-supported url path, so that if there is a key like .*/test
in the rules, the module matches paths /test
, /test/
, /test?
but not /testing
.FAQs
A proxy rules add-on to the node-http-proxy module.
The npm package http-proxy-rules receives a total of 10,239 weekly downloads. As such, http-proxy-rules popularity was classified as popular.
We found that http-proxy-rules demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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