Call the "match patterns" API?
The JavaScript JavaScript API maps patterns in different places. In a Chrome extension, is there a way to manually call any functions that Google uses to check if a URL is being saved with a given match pattern? I have a bunch of urls that I would like to test.
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No no. However, it is not that hard to replicate using regular expressions.
Here is the implementation. It checks for normal constraints on match patterns, but does not validate the host of the pattern / test url.
function patternToRegExp(pattern){
if(pattern == "<all_urls>") return /^(?:http|https|file|ftp):\/\/.*/;
var split = /^(\*|http|https|file|ftp):\/\/(.*)$/.exec(pattern);
if(!split) throw Error("Invalid schema in " + pattern);
var schema = split[1];
var fullpath = split[2];
var split = /^([^\/]*)\/(.*)$/.exec(fullpath);
if(!split) throw Error("No path specified in " + pattern);
var host = split[1];
var path = split[2];
// File
if(schema == "file" && host != "")
throw Error("Non-empty host for file schema in " + pattern);
if(schema != "file" && host == "")
throw Error("No host specified in " + pattern);
if(!(/^(\*|\*\.[^*]+|[^*]*)$/.exec(host)))
throw Error("Illegal wildcard in host in " + pattern);
var reString = "^";
reString += (schema == "*") ? "https*" : schema;
reString += ":\\/\\/";
// Not overly concerned with intricacies
// of domain name restrictions and IDN
// as we're not testing domain validity
reString += host.replace(/\*\.?/, "[^\\/]*");
reString += "(:\\d+)?";
reString += "\\/";
reString += path.replace("*", ".*");
reString += "$";
return RegExp(reString);
}
// Usage example
// Precompile the expression for performance reasons
var re = patternToRegExp("*://*.example.com/*.css");
// Test against it
re.test("http://example.com/"); // false
re.test("https://example.com/css/example.css"); // true
re.test("http://www.example.com/test.css"); // true
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