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126 lines
5.9 KiB
Markdown
126 lines
5.9 KiB
Markdown
<a href="http://promisesaplus.com/">
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<img src="https://promises-aplus.github.io/promises-spec/assets/logo-small.png" align="right" alt="Promises/A+ logo" />
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</a>
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# request-promise-core
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[](https://gitter.im/request/request-promise?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[](https://travis-ci.org/request/promise-core)
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[](https://coveralls.io/r/request/promise-core)
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[](https://david-dm.org/request/promise-core)
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[](https://snyk.io/test/npm/promise-core)
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This package is the core for the following packages:
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- [`request-promise`](https://github.com/request/request-promise)
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- [`request-promise-any`](https://github.com/request/request-promise-any)
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- [`request-promise-bluebird`](https://github.com/request/request-promise-bluebird)
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- [`request-promise-native`](https://github.com/request/request-promise-native)
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`request-promise-core` contains the core logic to add Promise support to [`request`](https://github.com/request/request).
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Please use one of the libraries above. It is only recommended to use this library directly, if you have very specific requirements.
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## Installation for `request@^2.34`
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This module is installed via npm:
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```
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npm install --save request
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npm install --save request-promise-core
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```
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`request` is defined as a peer-dependency and thus has to be installed separately.
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## Usage for `request@^2.34`
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``` js
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// 1. Load the request library
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// Only use a direct require if you are 100% sure that:
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// - Your project does not use request directly. That is without the Promise capabilities by calling require('request').
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// - Any of the installed libraries use request.
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// ...because Request's prototype will be patched in step 2.
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/* var request = require('request'); */
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// Instead use:
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var stealthyRequire = require('stealthy-require');
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var request = stealthyRequire(require.cache, function () {
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return require('request');
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});
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// 2. Add Promise support to request
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var configure = require('request-promise-core/configure/request2');
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configure({
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request: request,
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// Pass your favorite ES6-compatible promise implementation
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PromiseImpl: Promise,
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// Expose all methods of the promise instance you want to call on the request(...) call
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expose: [
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'then', // Allows to use request(...).then(...)
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'catch', // Allows to use request(...).catch(...)
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'promise' // Allows to use request(...).promise() which returns the promise instance
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],
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// Optional: Pass a callback that is called within the Promise constructor
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constructorMixin: function (resolve, reject) {
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// `this` is the request object
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// Additional arguments may be passed depending on the PromiseImpl used
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}
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});
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// 3. Use request with its promise capabilities
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// E.g. crawl a web page:
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request('http://www.google.com')
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.then(function (htmlString) {
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// Process html...
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})
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.catch(function (err) {
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// Crawling failed...
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});
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```
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## Installation and Usage for `request@next`
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[Request Next](https://github.com/request/request/issues/1982) is still in alpha. However, `request-promise-core` is already designed to be compatible and ships with a configuration helper – `require('request-promise-core/configure/request-next')` – that is [used by `request-promise`](https://github.com/request/request-promise/blob/next/lib/rp.js) in its "next" branch.
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## Contributing
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To set up your development environment:
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1. clone the repo to your desktop,
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2. in the shell `cd` to the main folder,
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3. hit `npm install`,
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4. hit `npm install gulp -g` if you haven't installed gulp globally yet, and
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5. run `gulp dev`. (Or run `node ./node_modules/.bin/gulp dev` if you don't want to install gulp globally.)
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`gulp dev` watches all source files and if you save some changes it will lint the code and execute all tests. The test coverage report can be viewed from `./coverage/lcov-report/index.html`.
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If you want to debug a test you should use `gulp test-without-coverage` to run all tests without obscuring the code by the test coverage instrumentation.
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## Change History
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- 1.1.2 (2019-02-14)
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- Security fix: bumped `lodash` to `^4.17.11`. See [vulnerabilty reports](https://snyk.io/vuln/search?q=lodash&type=npm).
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*(Thanks to @lucaswillering and @sam-warren-finnair for reporting this in issues [#12](https://github.com/request/promise-core/issues/12) and [#13](https://github.com/request/promise-core/issues/13) and thanks to @Alec321 for pull request [#14](https://github.com/request/promise-core/pull/14).)*
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- 1.1.1 (2016-08-08)
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- Renamed package to `request-promise-core` because there were [too](https://github.com/request/request-promise/issues/137) [many](https://github.com/request/request-promise/issues/141) issues with the scoped package name `@request/promise-core`
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- 1.1.0 (2016-07-30)
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- Added `constructorMixin` option to enable [request/request-promise#123](https://github.com/request/request-promise/pull/123)
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- 1.0.0 (2016-07-15)
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- All tests green, ready for prime time
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- 1.0.0-rc.1 (2016-07-10)
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- Reimplementation of core logic based on `request-promise@3.0.0`
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- Plus `transform2xxOnly` option (fixes [request/request-promise#131](https://github.com/request/request-promise/issues/131))
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## License (ISC)
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In case you never heard about the [ISC license](http://en.wikipedia.org/wiki/ISC_license) it is functionally equivalent to the MIT license.
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See the [LICENSE file](LICENSE) for details.
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