corsyusha
v1.2.0
Published
Simple and fast (built on top of fastify) proxy to bypass CORS issues during prototyping against existing APIs without having to worry about CORS
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Corsyusha — Local CORS Proxy
Description
Simple and fast (built on top of fastify proxy to bypass CORS issues during prototyping against existing APIs without having to worry about CORS
This module was built to solve the issue of getting errors like this:
... has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
Installation
npm install -g corsyusha
# or
yarn global add corsyusha
Testing
yarn test:jest # Runs Jest with coverage collection
yarn test:coverage # Sends coverage to .coveralls.io
yarn test # yarn test:jest && yarn test:coverage
Usage
Let's imagine API endpoint that we want to request that has CORS issues:
https://licenseapi.herokuapp.com/licenses/mit
Start Proxy:
corsyusha --url https://licenseapi.herokuapp.com
Or:
CORSYUSHA_URL=https://licenseapi.herokuapp.com corsyusha
Or you may pull Docker image and run a container:
docker pull lordotu/corsyusha
docker run -dti \
-e CORSYUSHA_URL=https://licenseapi.herokuapp.com \
-e CORSYUSHA_HOST=0.0.0.0 \
-p 8118:8118 \
--name corsyusha \
lordotu/corsyusha
Then in your client code, new API endpoint:
http://localhost:8118/proxy/licenses/mit
End result will be a request to https://licenseapi.herokuapp.com/licenses/mit
without the CORS issues!
Alternatively you can install the package locally:
npm install corsyusha
# or
yarn add corsyusha
And add a script to your project:
"scripts": {
"proxy": "corsyusha --url https://licenseapi.herokuapp.com"
}
Or:
"scripts": {
"proxy": "CORSYUSHA_URL=https://licenseapi.herokuapp.com corsyusha"
}
Configuring
You may set params via command line args or via env variables. All defaults are stored in .env
file in the root directory.
Only one argument is required: --url
(or CORSYUSHA_URL
if you prefer env variables).
Options
| Option | Shorthand | Example | Default | |-----------------|-----------|-----------------------------------|----------:| | --url | -u | https://licenseapi.herokuapp.com | | | --port | -p | 8119 | 8118 | | --host | -h | 0.0.0.0 | localhost | | --urlSection | -s | trhough | proxy | | --serverLogging | -l | true | false | | --headers | | {"X-Requested-With": "Corsyusha"} | {} | | --headers | | {"X-Requested-With": "Corsyusha"} | {} | | --origin | -o | http://127.0.0.1 | * | | --reflectOrigin | -r | true | false |
Environment variables
| Option | Example | Default | |--------------------------|-----------------------------------|----------:| | CORSYUSHA_URL | https://licenseapi.herokuapp.com | | | CORSYUSHA_PORT | 8119 | 8118 | | CORSYUSHA_HOST | 0.0.0.0 | localhost | | CORSYUSHA_URL_SECTION | trhough | proxy | | CORSYUSHA_SERVER_LOGGING | true | false | | CORSYUSHA_HEADERS | {"X-Requested-With": "Corsyusha"} | {} | | CORSYUSHA_ORIGIN | http://127.0.0.1 | * | | CORSYUSHA_REFLECT_ORIGIN | true | false |