Use @mswjs/interceptors for mocking #2517
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| Original file line number | Diff line number | Diff line change |
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@@ -10,6 +10,9 @@ | |
| const http = require('http') | ||
| const debug = require('debug')('nock.intercept') | ||
| const globalEmitter = require('./global_emitter') | ||
| const { BatchInterceptor } = require('@mswjs/interceptors') | ||
| const { FetchInterceptor } = require('@mswjs/interceptors/fetch') | ||
| const { default: nodeInterceptors } = require('@mswjs/interceptors/presets/node') | ||
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| /** | ||
| * @name NetConnectNotAllowedError | ||
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@@ -365,75 +368,105 @@ | |
| return [].concat(...interceptorScopes().map(scope => scope.activeMocks())) | ||
| } | ||
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| function getRequestOptionsFromFetchRequest(fetchRequest) { | ||
| const requestOptions = { | ||
| method: fetchRequest.method, | ||
| headers: {}, | ||
| }; | ||
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| fetchRequest.headers.forEach((value, key) => { | ||
| requestOptions.headers[key] = value; | ||
| }); | ||
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| const url = new URL(fetchRequest.url); | ||
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| const options = { | ||
| ...requestOptions, | ||
| hostname: url.hostname, | ||
| port: url.port, | ||
| path: url.pathname + url.search, | ||
| proto: url.protocol === 'https:' ? 'https' : 'http', | ||
| }; | ||
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| return options; | ||
| } | ||
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| function convertFetchRequestToClientRequest(fetchRequest) { | ||
| const url = new URL(fetchRequest.url); | ||
| const options = { | ||
| method: fetchRequest.method, | ||
| host: url.hostname, | ||
| port: url.port || (url.protocol === 'https:' ? 443 : 80), | ||
| path: url.pathname + url.search, | ||
| headers: fetchRequest.headers, | ||
| proto: url.protocol.slice(0, -1), | ||
| headers: Object.fromEntries(fetchRequest.headers.entries()) | ||
| }; | ||
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| const clientRequest = new http.ClientRequest(options); | ||
| // Note: You won't have access to the request body data from the Fetch Request | ||
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| return clientRequest; | ||
| } | ||
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| function activate() { | ||
| if (originalClientRequest) { | ||
| throw new Error('Nock already active') | ||
| } | ||
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| overrideClientRequest() | ||
| const interceptor = new BatchInterceptor({ | ||
| name: 'my-interceptor', | ||
|
There was a problem hiding this comment. Giving this a meaningful name may improve the logging output, afaik. Maybe |
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| interceptors: [...nodeInterceptors, new FetchInterceptor()], | ||
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| }) | ||
| interceptor.apply(); | ||
| interceptor.on('request', function ({ request, requestId }) { | ||
| return new Promise((resolve) => { | ||
| const { options, callback } = common.normalizeClientRequestArgs(request.url) | ||
| options.proto = options.protocol.slice(0, -1) | ||
| const interceptors = interceptorsFor(options) | ||
| if (isOn() && interceptors) { | ||
| const matches = interceptors.some(interceptor => | ||
| interceptor.matchOrigin(options) | ||
| ) | ||
| const allowUnmocked = interceptors.some( | ||
| interceptor => interceptor.options.allowUnmocked | ||
| ) | ||
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| if (!matches && allowUnmocked) { | ||
| // TODO: implement unmocked | ||
| // let req | ||
| // if (proto === 'https') { | ||
| // const { ClientRequest } = http | ||
| // http.ClientRequest = originalClientRequest | ||
| // req = overriddenRequest(options, callback) | ||
| // http.ClientRequest = ClientRequest | ||
| // } else { | ||
| // req = overriddenRequest(options, callback) | ||
| // } | ||
| // globalEmitter.emit('no match', req) | ||
| // return req | ||
| throw new Error('TODO') | ||
| } | ||
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| const req = convertFetchRequestToClientRequest(request); | ||
| req.on('response', response => { | ||
| request.respondWith(new Response('test', { status: 200 })) | ||
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There was a problem hiding this comment. Nitpick: we'd want to read the response stream to the As I mentioned in the issue, let me know if exporting this existing utility from Interceptors would help here. I think it would. There was a problem hiding this comment. Do you have an idea how we can wait for the nockResponse
Thanks!! For now, I copied the file. We can update this later. There was a problem hiding this comment. In this case, we can rely on the internal const stream = new Readable()
const fetchResponse = new Response(stream, {
status: response.statusCode,
statusText: response.statusMessage,
headers: response.headers // pseudo-code
})
response.on('data', (chunk) => stream.write(chunk))
response.on('end', () => {
stream.finish()
request.respndWith(fetchResponse)
})This is a gist. If you want the actual implementation example, take a look at this function. |
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| resolve() | ||
| }) | ||
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| req.end() | ||
| } else { | ||
| globalEmitter.emit('no match', options) | ||
| if (isOff() || isEnabledForNetConnect(options)) { | ||
| // TODO: implement unmocked | ||
| return overriddenRequest(options, callback) | ||
| } else { | ||
| const error = new NetConnectNotAllowedError(options.host, options.path) | ||
| return new ErroringClientRequest(error) | ||
| } | ||
| } | ||
| }) | ||
| }) | ||
| } | ||
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I think Node expects
OutgoingHeadershere, which is not compatible with theHeadersinstance. You should be fine doing this:There was a problem hiding this comment.
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great catch! 🙏
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Just be cautious about the compilation target here. I'm not sure what's the support range is for Nock, but
.fromEntries()and.entries()methods may not exist on super old versions of ECMAScript and Node.