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Throw HttpClientError instead of Error #32
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Tests failing because of postmanlabs/httpbin#617 |
JojOatXGME
reviewed
Aug 18, 2020
| super(message) | ||
| this.name = 'HttpClientError' | ||
| this.statusCode = statusCode | ||
| Object.setPrototypeOf(this, HttpClientError.prototype) |
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I took a short look into the pull request and was wondering what this line is about. Isn't it redundant? I thought the prototype of this (in a constructor) is <class>.prototype by default.
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Apparently it's to fix a TypeScript issue - https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#extending-built-ins-like-error-array-and-map-may-no-longer-work
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Interesting. Didn't know about this issue. Thanks for your reply.
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The
<verb>Jsonhelper methods throw an Error when the server responds with a non-zero status code. They also attach the status code and result as properties.This, however, is not compatible with TypeScript strict type checking. As a result, code depending on
http-clientthat use strict type checking (such asactions/toolkit) can't read the status code and result properties without resorting to TypeScript hacks, such as casting the error object toanyand ignoring the resulting lint warnings.This PR adds a new error subclass,
HttpClientError, which properties to store the status code and result. Throwing a different error type also lets callers distinguish between errors related to the API call from other generic errors, such as socket errors.