As of Feb 11th 2020, request is fully deprecated. No new changes are expected to land. In fact, none have landed for some time. This package is also deprecated because it depends on request.
Fyi, here is the reasoning of request's deprecation and a list of alternative libraries.
The simplified HTTP request client 'request' with Promise support. Powered by Bluebird.
Request and Bluebird are pretty awesome, but I found myself using the same design pattern. Request-Promise adds a Bluebird-powered .then(...) method to Request call objects. By default, http response codes other than 2xx will cause the promise to be rejected. This can be overwritten by setting options.simple = false.
Also check out the new libraries that are very similar to request-promise v4:
request-promise-nativev1 – Does not depend on Bluebird and uses native ES6 promises instead.request-promise-anyv1 – Allows you to register any Promise library supported byany-promise.
requestbecame a peer dependency. Thus make sure thatrequestis installed into your project as a direct dependency. (npm install --save request)- Continuation Local Storage is no longer supported. However, you can get back the support by using
request-promise-any. - When you migrated your
transformfunction to v3 and had to addif (!(/^2/.test('' + response.statusCode))) { return resolveWithFullResponse ? response : body; }you may now set the optiontransform2xxOnly = trueinstead.
-
The handling of the
transformfunction got overhauled. This has two effects:StatusCodeError.responseis the transformed instead of the original response now. This error is thrown for non-2xx responses whenoptions.simpleistrue(default). Please update yourtransformfunctions to also cover the transformation of non-2xx responses. To get the old behavior you may addif (!(/^2/.test('' + response.statusCode))) { return resolveWithFullResponse ? response : body; }to the first line of yourtransformfunctions that are used for requests withoptions.simple === true. However, you may prefer updating yourtransformfunctions to being able to transform 2xx as well as non-2xx responses because this decouples their implementation from the use of thesimpleoption when doing requests.- If a transform operation throws an error, the request will be rejected with a
TransformError. Itscauseattribute contains the error thrown by the transform operation. Previously, the request was rejected directly with the error thrown by the transform operation. Wrapping it into aTransformErrormakes the error handling easier.
-
Bluebird got updated from v2 to v3. This won't make a difference for most use cases. However, if you use advanced Promise chains starting with the Promise returned by Request-Promise, please check Bluebird's new features and changes.
This module is installed via npm:
npm install --save request
npm install --save request-promise
request is defined as a peer-dependency and thus has to be installed separately.
var rp = require('request-promise');Since request-promise wraps around request everything that works with request also works with request-promise. Also check out the request docs for more examples.
rp('http://www.google.com')
.then(function (htmlString) {
// Process html...
})
.catch(function (err) {
// Crawling failed...
});var cheerio = require('cheerio'); // Basically jQuery for node.js
var options = {
uri: 'http://www.google.com',
transform: function (body) {
return cheerio.load(body);
}
};
rp(options)
.then(function ($) {
// Process html like you would with jQuery...
})
.catch(function (err) {
// Crawling failed or Cheerio choked...
});var options = {
uri: 'https://api.github.com/user/repos',
qs: {
access_token: 'xxxxx xxxxx' // -> uri + '?access_token=xxxxx%20xxxxx'
},
headers: {
'User-Agent': 'Request-Promise'
},
json: true // Automatically parses the JSON string in the response
};
rp(options)
.then(function (repos) {
console.log('User has %d repos', repos.length);
})
.catch(function (err) {
// API call failed...
});Set option.body to your data and json: true to encode the body as JSON. See below for HTML forms.
var options = {
method: 'POST',
uri: 'http://api.posttestserver.com/post',
body: {
some: 'payload'
},
json: true // Automatically stringifies the body to JSON
};
rp(options)
.then(function (parsedBody) {
// POST succeeded...
})
.catch(function (err) {
// POST failed...
});Pass your data to options.form to encode the body the same way as HTML forms do:
var options = {
method: 'POST',
uri: 'http://posttestserver.com/post.php',
form: {
// Like <input type="text" name="name">
name: 'Josh'
},
headers: {
/* 'content-type': 'application/x-www-form-urlencoded' */ // Is set automatically
}
};
rp(options)
.then(function (body) {
// POST succeeded...
})
.catch(function (err) {
// POST failed...
});If you want to include a file upload then use options.formData:
var options = {
method: 'POST',
uri: 'http://posttestserver.com/post.php',
formData: {
// Like <input type="text" name="name">
name: 'Jenn',
// Like <input type="file" name="file">
file: {
value: fs.createReadStream('test/test.jpg'),
options: {
filename: 'test.jpg',
contentType: 'image/jpg'
}
}
},
headers: {
/* 'content-type': 'multipart/form-data' */ // Is set automatically
}
};
rp(options)
.then(function (body) {
// POST succeeded...
})
.catch(function (err) {
// POST failed...
});var tough = require('tough-cookie');
// Easy creation of the cookie - see tough-cookie docs for details
let cookie = new tough.Cookie({
key: "some_key",
value: "some_value",
domain: 'api.mydomain.com',
httpOnly: true,
maxAge: 31536000
});
// Put cookie in an jar which can be used across multiple requests
var cookiejar = rp.jar();
cookiejar.setCookie(cookie, 'https://api.mydomain.com');
// ...all requests to https://api.mydomain.com will include the cookie
var options = {
uri: 'https://api.mydomain.com/...',
jar: cookiejar // Tells rp to include cookies in jar that match uri
};
rp(options)
.then(function (body) {
// Request succeeded...
})
.catch(function (err) {
// Request failed...
});var options = {
method: 'DELETE',
uri: 'http://my-server/path/to/resource/1234',
resolveWithFullResponse: true // <--- <--- <--- <---
};
rp(options)
.then(function (response) {
console.log("DELETE succeeded with status %d", response.statusCode);
})
.catch(function (err) {
// Delete failed...
});var options = {
uri: 'http://www.google.com/this-page-does-not-exist.html',
simple: false // <--- <--- <--- <---
};
rp(options)
.then(function (body) {
// Request succeeded but might as well be a 404
// Usually combined with resolveWithFullResponse = true to check response.statusCode
})
.catch(function (err) {
// Request failed due to technical reasons...
});For more options checkout the Request docs.
Consider Request-Promise being:
- A Request object
- With an identical API:
require('request-promise') == require('request')so to say - However, STREAMING THE RESPONSE (e.g.
.pipe(...)) is DISCOURAGED because Request-Promise would grow the memory footprint for large requests unnecessarily high. Use the original Request library for that. You can use both libraries in the same project.
- With an identical API:
- Plus some methods on a request call object:
rp(...).then(...)or e.g.rp.post(...).then(...)which turnrp(...)andrp.post(...)into promisesrp(...).catch(...)or e.g.rp.del(...).catch(...)which is the same method as provided by Bluebird promises- Errors that the
requestlibrary would pass to the callback are wrapped byrequest-promiseand then passed to the catch handler. See code example below.
- Errors that the
rp(...).finally(...)or e.g.rp.put(...).finally(...)which is the same method as provided by Bluebird promisesrp(...).cancel()or e.g.rp.get(...).cancel()which cancels the requestrp(...).promise()or e.g.rp.head(...).promise()which returns the underlying promise so you can access the full Bluebird API
- Plus some additional options:
simple = truewhich is a boolean to set whether status codes other than 2xx should also reject the promiseresolveWithFullResponse = falsewhich is a boolean to set whether the promise should be resolved with the full response or just the response bodytransformwhich takes a function to transform the response into a custom value with which the promise is resolvedtransform2xxOnly = falsewhich is a boolean to set whether the transform function is applied to all responses or only to those with a 2xx status code
The objects returned by request calls like rp(...) or e.g. rp.post(...) are regular Promises/A+ compliant promises and can be assimilated by any compatible promise library.
The methods .then(...), .catch(...), and .finally(...) - which you can call on the request call objects - return a full-fledged Bluebird promise. That means you have the full Bluebird API available for further chaining. E.g.: rp(...).then(...).spread(...) If, however, you need a method other than .then(...), .catch(...), or .finally(...) to be FIRST in the chain, use .promise(): rp(...).promise().bind(...).then(...)
// As a Request user you would write:
var request = require('request');
request('http://google.com', function (err, response, body) {
if (err) {
handleError({ error: err, response: response, ... });
} else if (!(/^2/.test('' + response.statusCode))) { // Status Codes other than 2xx
handleError({ error: body, response: response, ... });
} else {
process(body);
}
});
// As a Request-Promise user you can now write the equivalent code:
var rp = require('request-promise');
rp('http://google.com')
.then(process, handleError);// The same is available for all http method shortcuts:
request.post('http://example.com/api', function (err, response, body) { ... });
rp.post('http://example.com/api').then(...);rp('http://google.com')
.catch(handleError);
// ... is syntactical sugar for:
rp('http://google.com')
.then(null, handleError);
// However, this:
rp('http://google.com')
.then(process)
.catch(handleError);
// ... is safer than:
rp('http://google.com')
.then(process, handleError);For more info on .then(process).catch(handleError) versus .then(process, handleError), see Bluebird docs on promise anti-patterns.
rp('http://google.com')
.finally(function () {
// This is called after the request finishes either successful or not successful.
});This method cancels the request using Bluebird's cancellation feature.
When .cancel() is called:
- the promise will neither be resolved nor rejected and
- the request is aborted.
In order to not pollute the Request call objects with the methods of the underlying Bluebird promise, only .then(...), .catch(...), and .finally(...) were exposed to cover most use cases. The effect is that any methods of a Bluebird promise other than .then(...), .catch(...), or .finally(...) cannot be used as the FIRST method in the promise chain:
// This works:
rp('http://google.com').then(function () { ... });
rp('http://google.com').catch(function () { ... });
// This works as well since additional methods are only used AFTER the FIRST call in the chain:
rp('http://google.com').then(function () { ... }).spread(function () { ... });
rp('http://google.com').catch(function () { ... }).error(function () { ... });
// Using additional methods as the FIRST call in the chain does not work:
// rp('http://google.com').bind(this).then(function () { ... });
// Use .promise() in these cases:
rp('http://google.com').promise().bind(this).then(function () { ... });// Per default the body is passed to the fulfillment handler:
rp('http://google.com')
.then(function (body) {
// Process the html of the Google web page...
});
// The resolveWithFullResponse options allows to pass the full response:
rp({ uri: 'http://google.com', resolveWithFullResponse: true })
.then(function (response) {
// Access response.statusCode, response.body etc.
});// The rejection handler is called with a reason object...
rp('http://google.com')
.catch(function (reason) {
// Handle failed request...
});
// ... and would be equivalent to this Request-only implementation:
var options = { uri: 'http://google.com' };
request(options, function (err, response, body) {
var reason;
if (err) {
reason = {
cause: err,
error: err,
options: options,
response: response
};
} else if (!(/^2/.test('' + response.statusCode))) { // Status Codes other than 2xx
reason = {
statusCode: response.statusCode,
error: body,
options: options,
response: response
};
}
if (reason) {
// Handle failed request...
}
});
// If you pass the simple option as false...
rp({ uri: 'http://google.com', simple: false })
.catch(function (reason) {
// Handle failed request...
});
// ... the equivalent Request-only code would be:
request(options, function (err, response, body) {
if (err) {
var reason = {
cause: err,
error: err,
options: options,
response: response
};
// Handle failed request...
}
});
// E.g. a 404 would now fulfill the promise.
// Combine it with resolveWithFullResponse = true to check the status code in the fulfillment handler.With version 0.4 the reason objects became Error objects with identical properties to ensure backwards compatibility. These new Error types allow targeted catch blocks:
var errors = require('request-promise/errors');
rp('http://google.com')
.catch(errors.StatusCodeError, function (reason) {
// The server responded with a status codes other than 2xx.
// Check reason.statusCode
})
.catch(errors.RequestError, function (reason) {
// The request failed due to technical reasons.
// reason.cause is the Error object Request would pass into a callback.
});You can pass a function to options.transform to generate a custom fulfillment value when the promise gets resolved.
// Just for fun you could reverse the response body:
var options = {
uri: 'http://google.com',
transform: function (body, response, resolveWithFullResponse) {
return body.split('').reverse().join('');
}
};
rp(options)
.then(function (reversedBody) {
// ;D
});
// However, you could also do something useful:
var $ = require('cheerio'); // Basically jQuery for node.js
function autoParse(body, response, resolveWithFullResponse) {
// FIXME: The content type string could contain additional values like the charset.
// Consider using the `content-type` library for a robust comparison.
if (response.headers['content-type'] === 'application/json') {
return JSON.parse(body);
} else if (response.headers['content-type'] === 'text/html') {
return $.load(body);
} else {
return body;
}
}
options.transform = autoParse;
rp(options)
.then(function (autoParsedBody) {
// :)
});
// You can go one step further and set the transform as the default:
var rpap = rp.defaults({ transform: autoParse });
rpap('http://google.com')
.then(function (autoParsedBody) {
// :)
});
rpap('http://echojs.com')
.then(function (autoParsedBody) {
// =)
});The third resolveWithFullResponse parameter of the transform function is equivalent to the option passed with the request. This allows to distinguish whether just the transformed body or the whole response shall be returned by the transform function:
function reverseBody(body, response, resolveWithFullResponse) {
response.body = response.body.split('').reverse().join('');
return resolveWithFullResponse ? response : response.body;
}As of Request-Promise v3 the transform function is ALWAYS executed for non-2xx responses. When options.simple is set to true (default) then non-2xx responses are rejected with a StatusCodeError. In this case the error contains the transformed response:
var options = {
uri: 'http://the-server.com/will-return/404',
simple: true,
transform: function (body, response, resolveWithFullResponse) { /* ... */ }
};
rp(options)
.catch(errors.StatusCodeError, function (reason) {
// reason.response is the transformed response
});You may set options.transform2xxOnly = true to only execute the transform function for responses with a 2xx status code. For other status codes – independent of any other settings, e.g. options.simple – the transform function is not executed.
If the transform operation fails (throws an error) the request will be rejected with a TransformError:
var errors = require('request-promise/errors');
var options = {
uri: 'http://google.com',
transform: function (body, response, resolveWithFullResponse) {
throw new Error('Transform failed!');
}
};
rp(options)
.catch(errors.TransformError, function (reason) {
console.log(reason.cause.message); // => Transform failed!
// reason.response is the original response for which the transform operation failed
});Continuation Local Storage is no longer supported. However, you can get back the support by using request-promise-any.
The ways to debug the operation of Request-Promise are the same as described for Request. These are:
- Launch the node process like
NODE_DEBUG=request node script.js(lib,request,otherlibworks too). - Set
require('request-promise').debug = trueat any time (this does the same thing as #1). - Use the request-debug module to view request and response headers and bodies. Instrument Request-Promise with
require('request-debug')(rp);.
Usually you want to mock the whole request function which is returned by require('request-promise'). This is not possible by using a mocking library like sinon.js alone. What you need is a library that ties into the module loader and makes sure that your mock is returned whenever the tested code is calling require('request-promise'). Mockery is one of such libraries.
@florianschmidt1994 kindly shared his solution:
before(function (done) {
var filename = "fileForResponse";
mockery.enable({
warnOnReplace: false,
warnOnUnregistered: false,
useCleanCache: true
});
mockery.registerMock('request-promise', function () {
var response = fs.readFileSync(__dirname + '/data/' + filename, 'utf8');
return Bluebird.resolve(response.trim());
});
done();
});
after(function (done) {
mockery.disable();
mockery.deregisterAll();
done();
});
describe('custom test case', function () {
// Test some function/module/... which uses request-promise
// and it will always receive the predefined "fileForResponse" as data, e.g.:
var rp = require('request-promise');
rp(...).then(function(data) {
// ➞ data is what is in fileForResponse
});
});Based on that you may now build a more sophisticated mock. Sinon.js may be of help as well.
To set up your development environment:
- clone the repo to your desktop,
- in the shell
cdto the main folder, - hit
npm install, - hit
npm install gulp -gif you haven't installed gulp globally yet, and - run
gulp dev. (Or runnode ./node_modules/.bin/gulp devif you don't want to install gulp globally.)
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.
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.
- v4.2.6 (2020-07-21)
- Security fix: bumped
request-promise-corewhich bumpslodashto^4.17.19following this advisory.
- Security fix: bumped
- v4.2.5 (2019-11-03)
- Security fix: bumped
request-promise-corewhich bumpslodashto^4.17.15. See vulnerabilty reports. (Thanks to @rishabh-chowdhary for reporting this in pull request #326.)
- Security fix: bumped
- v4.2.4 (2019-02-14)
- Corrected mistakenly set
tough-cookieversion, now^2.3.3(Thanks to @evocateur for pointing this out.) - If you installed
[email protected]please make sure after the upgrade thatrequestandrequest-promiseuse the same physical copy oftough-cookie.
- Corrected mistakenly set
- v4.2.3 (2019-02-14)
- Using stricter
tough-cookie@~2.3.3to avoid installingtough-cookie@3which introduces breaking changes (Thanks to @aomdoa for pull request #299) - Security fix: bumped
lodashto^4.17.11, see vulnerabilty reports
- Using stricter
- v4.2.2 (2017-09-22)
- Upgraded
tough-cookieto a version without regex DoS vulnerability (Thanks to @rouanw for pull request #226)
- Upgraded
- v4.2.1 (2017-05-07)
- Fix that allows to use
tough-cookiefor cookie creation (Thanks to @ScottyMJacobson for reporting issue #183) - Added cookie handling example to the cheat sheet (Thanks to @chovy and @ProfessorTom for asking for it)
- Fix that allows to use
- v4.2.0 (2017-03-16)
- Updated
bluebirdto v3.5 (Thanks to @acinader for pull request #181)
- Updated
- v4.1.1 (2016-08-08)
- v4.1.0 (2016-07-30)
- Added cancellation support (Thanks to @not-an-aardvark for pull request #123)
- v4.0.2 (2016-07-18)
- Fix for using with module bundlers like Webpack and Browserify
- v4.0.1 (2016-07-17)
- Fixed
@request/promise-coreversion for safer versioning
- Fixed
- v4.0.0 (2016-07-15)
- Breaking Change:
requestis declared as a peer dependency which has to be installed separately by the user now - Breaking Change: Dropped support for Continuation Local Storage since
request-promise-anycan be used for that now - Introduced the
transform2xxOnlyoption to ease the breaking change regarding the newtransformhandling in v3.0.0 (Thanks to @stevage for pointing out the effect of the breaking change in issue #131) - Resolved issues #65 and #71 by publishing nearly identical libraries to support other Promise implementations:
request-promise-nativeandrequest-promise-any(Thanks to @benjamingr, @eilgin, @gillesdemey, @hildjj, @iggycoloma, @jonathanong, @knpwrs, @MarkHerhold, @massimocode, @mikeal, @niftylettuce, @raitucarp, @sherdeadlock, @tonylukasavage, and @vgoloviznin for the valuable discussions!) - Relicensed this library with the ISC license
- Breaking Change:
- v3.0.0 (2016-04-16)
- Breaking Change: Overhauled the handling of the
transformfunction (Thanks to @Limess for explaining the need in issue #86) - Breaking Change: Updated
bluebirdto v3 (Thanks to @BrandonSmith for pull request #103) - Improved
StatusCodeError.message - Updated
lodashto v4.6 - Improved README in regard to
.catch(...)best practice (Thanks to @RebootJeff for pull request #98)
- Breaking Change: Overhauled the handling of the
- v2.0.1 (2016-02-17)
- Updated
lodashto v4 (Thanks to @ratson for pull request #94)
- Updated
- v2.0.0 (2016-01-12)
- Breaking Change: Removed explicit
cls-bluebirddependency which has to be installed by the user now (Thanks to @hildjj for his pull request #75) npm shrinkwrapnow works fornpm@3users who don't usecontinuation-local-storage(Thanks to @toboid and @rstacruz for reporting the issue in issue #70 and issue #82)
- Breaking Change: Removed explicit
- v1.0.2 (2015-10-22)
- Removed
continuation-local-storagefrom peer dependencies as it was unnecessary (Thanks to @mrhyde for working on a better solution discussed in issue #70)
- Removed
- v1.0.1 (2015-10-14)
- Fixed a npm warning by marking
continuation-local-storageas a peer dependency
- Fixed a npm warning by marking
- v1.0.0 (2015-10-11)
- Breaking Change: Some errors that were previously thrown synchronously - e.g. for wrong input parameters - are now passed to the rejected promise instead (Thanks to @josnidhin for suggesting that in issue #43)
- Breaking Change: Request-Promise does not load its own Bluebird prototype anymore. If you use Bluebird in your project and altered the prototype then Request-Promise may use your altered Bluebird prototype internally.
- For HEAD requests the headers instead of an empty body is returned (unless
resolveWithFullResponse = trueis used) (Thanks to @zcei for proposing the change in issue #58) - Extended
transformfunction by a thirdresolveWithFullResponseparameter - Added experimental support for continuation local storage (Thanks to @silverbp preparing this in issue #64)
- Added node.js 4 to the Travis CI build
- Updated the README (Thanks to many people for their feedback in issues #55 and #59)
- v0.4.3 (2015-07-27)
- Reduced overhead by just requiring used lodash functions instead of the whole lodash library (Thanks to @luanmuniz for pull request #54)
- Updated dependencies
- v0.4.2 (2015-04-12)
- Updated dependencies
- v0.4.1 (2015-03-20)
- Improved Error types to work in browsers without v8 engine (Thanks to @nodiis for pull request #40)
- v0.4.0 (2015-02-08)
- Introduced Error types used for the reject reasons (See last part this section) (Thanks to @jakecraige for starting the discussion in issue #38)
- Minor Breaking Change: The reject reason objects became actual Error objects. However,
typeof reason === 'object'still holds true and the error objects have the same properties as the previous reason objects. If the reject handler only accesses the properties on the reason object - which is usually the case - no migration is required. - Added io.js and node.js 0.12 to the Travis CI build
- v0.3.3 (2015-01-19)
- Fixed handling possibly unhandled rejections to work with the latest version of Bluebird (Thanks to @slang800 for reporting this in issue #36)
- v0.3.2 (2014-11-17)
- Exposed
.finally(...)to allow using it as the first method in the promise chain (Thanks to @hjpbarcelos for his pull request #28)
- Exposed
- v0.3.1 (2014-11-11)
- Added the
.promise()method for advanced Bluebird API usage (Thanks to @devo-tox for his feedback in issue #27)
- Added the
- v0.3.0 (2014-11-10)
- Carefully rewritten from scratch to make Request-Promise a drop-in replacement for Request
In case you never heard about the ISC license it is functionally equivalent to the MIT license.
See the LICENSE file for details.
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