add an "append_path" function to url #934
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this function is an alternative to `Url::join` which addresses issues discussed in servo#333, mainly that `Url::join` is sensitive to trailing slashes is in the `Url`, and if the trailing slash is missing, may remove segments from the base url and replace them with segments from the joined `Url`. There are good reasons for `Url::join` to behave that way, because that is was is specified in the `Url` standard. However it's still inconvenient because it often leads to situations where, a service takes some base-url for some API as a config parameter, uses `Url::join` to append various routes to it and make requests, and if a trailing `/` is omitted in a config file, you don't figure it out until deploying and looking at logs and seeing nonsense requests failing. In many situations in web development these trailing `/` are not significant so this is easy to forget and can become just an annoying papercut. One suggestion in servo#333 was to add an alternative utility function that isn't sensitive to the trailing `/`'s in this way. This commit adds such a utility function with tests.
cbeck88
commented
Jun 3, 2024
| // Remove any leading `/` from the path we are appending, this makes our code tolerate leading `/`'s | ||
| let path = path.as_ref(); | ||
| let path = path.strip_prefix('/').unwrap_or(path); | ||
| for segment in path.split('/') { |
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this splitting is based on similar code elsewhere in the library: https://docs.rs/url/2.5.0/src/url/lib.rs.html#1351
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This
append_pathfunction is an alternative toUrl::joinwhich addresses issues discussed in #333, mainly thatUrl::joinis sensitive to trailing slashes is in theUrl, and if the trailing slash is missing, may remove segments from the base url and replace them with segments from the joinedUrl.There are good reasons for
Url::jointo behave that way, because that is was is specified in theUrlstandard. (mentioned here: #333 (comment))However it's still inconvenient because it often leads to situations where, a service takes some base-url for some API as a config parameter, uses
Url::jointo append various routes to it and make requests, and if a trailing/is omitted in the config, you don't figure it out until deploying and looking at logs and seeing nonsense requests failing. In many situations in web development these trailing/are not significant so this is easy to forget and can become just an annoying papercut.One suggestion in #333 was to add an alternative utility function that isn't sensitive to the trailing
/'s in this way. This commit adds such a utility function with tests.I've been copy-pasting this around in several projects, I figured I would PR it back and see if there was any interest since it was discussed in the github issue.