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Wrap withinString in try/catch

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This commit is contained in:
Pavel Djundik 2017-10-05 23:44:20 +03:00
parent 0d6ff2535e
commit 9a8c1b2fd0
1 changed files with 33 additions and 29 deletions
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62
client/js/libs/handlebars/ircmessageparser/findLinks.js
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@ -22,41 +22,45 @@ function findLinks(text) {
// <a>-Tags.
// See https://medialize.github.io/URI.js/docs.html#static-withinString
// In our case, we store each URI encountered in a result array.
URI.withinString(text, function(url, start, end) {
let parsedScheme;
try {
URI.withinString(text, function(url, start, end) {
let parsedScheme;
try {
// Extract the scheme of the URL detected, if there is one
parsedScheme = URI(url).scheme().toLowerCase();
} catch (e) {
// URI may throw an exception for malformed urls,
// as to why withinString finds these in the first place is a mystery
return;
}
try {
// Extract the scheme of the URL detected, if there is one
parsedScheme = URI(url).scheme().toLowerCase();
} catch (e) {
// URI may throw an exception for malformed urls,
// as to why withinString finds these in the first place is a mystery
return;
}
// Check if the scheme of the detected URL matches a common one above.
// In a URL like `foo..http://example.com`, the scheme would be `foo..http`,
// so we need to clean up the end of the scheme and filter out the rest.
const matchedScheme = commonSchemes.find((scheme) => parsedScheme.endsWith(scheme));
// Check if the scheme of the detected URL matches a common one above.
// In a URL like `foo..http://example.com`, the scheme would be `foo..http`,
// so we need to clean up the end of the scheme and filter out the rest.
const matchedScheme = commonSchemes.find((scheme) => parsedScheme.endsWith(scheme));
// A known scheme was found, extract the unknown part from the URL
if (matchedScheme) {
const prefix = parsedScheme.length - matchedScheme.length;
start += prefix;
url = url.slice(prefix);
}
// A known scheme was found, extract the unknown part from the URL
if (matchedScheme) {
const prefix = parsedScheme.length - matchedScheme.length;
start += prefix;
url = url.slice(prefix);
}
// The URL matched but does not start with a scheme (`www.foo.com`), add it
if (!parsedScheme.length) {
url = "http://" + url;
}
// The URL matched but does not start with a scheme (`www.foo.com`), add it
if (!parsedScheme.length) {
url = "http://" + url;
}
result.push({
start: start,
end: end,
link: url
result.push({
start: start,
end: end,
link: url
});
});
});
} catch (e) {
// withinString is wrapped in a try/catch due to https://github.com/medialize/URI.js/issues/359
}
return result;
}