Created
March 13, 2015 01:30
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A rudimentary URL parser in javascript.
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var route = function(format) { | |
var splitIntoParts = function(url) { | |
var urlString = url.match(/^[^\?]*/) || [""] | |
return urlString[0].split('/'); | |
}; | |
var formatParts = splitIntoParts(format); // Split the format into parts for easy reuse | |
var splitIntoQueryParams = function(url) { | |
var paramString = url.match(/\?.*$/) || [""]; | |
return paramString[0].split('&'); | |
}; | |
var populateRouteParams = function(instanceParts, params) { | |
for(var i = 0; i < formatParts.length; i++) { | |
if (formatParts[i].match(/^:/)) // populate params if the current route part is a variable | |
params[formatParts[i].replace(/^:/, '')] = instanceParts[i] | |
else if (formatParts[i] != instanceParts[i]) // otherwise check for equality | |
throw 'Route does not match format: ' + format; | |
} | |
}; | |
var populateQueryParams = function(queryParams, params) { | |
for(var i = 0; i < queryParams.length; i++) { | |
if (queryParams[i].length > 0) { | |
queryParam = queryParams[i].match(/([a-z]*)=([a-z]*)/i); // Split each param around the = sign | |
params[queryParam[1]] = queryParam[2]; // Set the 'key' value on params to the query param value. | |
} | |
} | |
}; | |
return function(instance) { | |
var params = {}; | |
try { | |
populateRouteParams(splitIntoParts(instance), params); | |
populateQueryParams(splitIntoQueryParams(instance), params); | |
} | |
catch(e) { // Log the error, then return an empty set of params | |
params = {}; | |
console.log(e); | |
} | |
return params; | |
}; | |
}; | |
var apiRoute = route('/api/:version/:collection/:id'); | |
var memberRoute = route('/groups/:groupId/users/:memberId/:action'); | |
console.log(apiRoute('/api/v2/geese/5')); | |
console.log(apiRoute('/api/v1/mallards/1?color=green&gender=male')); | |
console.log(apiRoute('/groups/5/users/10/subscribe')) | |
console.log(memberRoute('/groups/5/users/10/subscribe')); | |
console.log(memberRoute('/groups/6/users/4/ban?reason=profanity')); | |
console.log(memberRoute('/api/v1/users/10')); |
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Some output from running the above in a console: