Curl with Arguments for Url
Project description
AWS Cloudwatch Insights
- Free software: Apache Software License 2.0
Though OpenAPI documented services offer a nice UI to test the endpoints, I couldn't find a good command line tool for
this. Here I created something that works nicely with zsh completions. If you have the OpenAPI spec available, you
put it in your ~/.carl/open_api
. Then parameters can be passed as +{param-name}
, with tab-completions, and then
these are passed to curl
.
There is no way that this covers all the cases for the OpenAPI spec, but it hopefully covers the vast majority people of cases people actually encounter.
Installation
# globally
% pipx install 'curl_arguments_url'
# or in a particular virtual env
% pip install 'curl_arguments_url'
# to get the completions to work, add the following to your .zshrc
eval "$(carl utils zsh-print-script)"
# And copy the OpenAPI spec into ~/.carl/open_api to get the completions and curl-building working
% cp open_api-spec.yml ~/.carl/open_api
# if parsing of the open_api files is too slow for you, you can try installing the ryaml (Rust Yaml) extension. I
# didn't include this by default because I'm afraid it might not install correctly on certain systems, but it's much
# faster
% pipx install 'curl_arguments_url[ryaml]'
Examples
These examples use tests/resources/open_api/openapi-demo.yml
- Basic GET
% carl http://demo.io/v0/entities/\{path-item\} GET +path-item ID +query-item query-this --no-run --print-cmd
curl -X GET 'http://demo.io/v0/entities/ID?query-item=query-this'
- More complicated POST command
% carl http://demo.io/v0/entities/\{path-item\} POST \
+path-item ID +field-one value +field-two an array of values \
+field-three '{"complex":["sub","value"]}' \
+field-header 'Header Param Value' \
--no-run --print-cmd \
-- --silent # you can get other arguments passed to curl at the end, like this
# the output wouldn't be this nicely formatted, but so you can see what curl command would be run
curl -X POST http://demo.io/v0/entities/ID \
-H 'field-header: Header Param Value' -H 'Content-Type: application/json' \
--data-binary \
'{"field-one": "value", "field-two": ["an", "array", "of", "values"], "field-three": {"complex": ["sub", "value"]}}' \
--silent
- Values are cached for completion by param name.
- These cached values can be managed with the
carl utils cached-values
utility:
% carl utils cached-values --help
usage: carl utils cached-values [-h] {params,ls,rm,add} ...
positional arguments:
{params,ls,rm,add}
params List all the param names that have values cached
ls List all the values cached for a particular param
rm Remove a value for an param from the cache for completions
add Add one or more values for a param to the cache
options:
-h, --help show this help message and exit
- Help is generated from the OpenAPI spec for your reference
% carl --help
usage: carl [-h] {utils,http://demo.io/v0/entities/{path-item},http://demo.io/v0/restricted,http://demo.io/v0/other,http://demo.io/v0/endpoints} ...
A Utility to cleanly take command-line arguments, for an endpoint you have the
OpenAPI specification for, and convert them into an appropriate curl command.
Spec files should be in /root/.carl/open_api directory or directory defined by
env variables (See below)
positional arguments:
{utils,http://demo.io/v0/entities/{path-item},http://demo.io/v0/restricted,http://demo.io/v0/other,http://demo.io/v0/endpoints}
utils Utilities
http://demo.io/v0/entities/{path-item}
Demo Entity Endpoint
http://demo.io/v0/restricted
A Restricted Endpoint
http://demo.io/v0/other
Another Endpoint
http://demo.io/v0/endpoints
Yet Another Endpoint
options:
-h, --help show this help message and exit
Environment Variables:
CARL_DIR: Directory which contains files for carl. Default: ~/.carl
CARL_OPEN_API_DIR: Directory containing the OpenApi specifications and
Yaml files. Default: $CARL_DIR/open_api
CARL_CACHE_DIR: Directory containing the cache. Default $CARL_DIR/cache
For a specific endpoint:
% carl http://demo.io/v0/entities/\{path-item\} POST --help
usage: carl http://demo.io/v0/entities/{path-item} POST [-h] [-p] [-n] [-R] [-b BODY_JSON] [+field-header FIELD_HEADER] [+field-one FIELD_ONE]
[+field-two FIELD_TWO [FIELD_TWO ...]] [+field-three FIELD_THREE] +path-item PATH_ITEM
[passed_to_curl ...]
Demo Post Command
positional arguments:
passed_to_curl Extra argument passed to curl, often after "--"
options:
-h, --help show this help message and exit
-p, --print-cmd Print the resulting curl command to standard out
-n, --no-run Don't run the curl command. Useful with -p
-R, --no-requires Don't check to see if required parameter values are missing or if values are one of the enumerated values
-b BODY_JSON, --body-json BODY_JSON, --body BODY_JSON
Base json object to send in the body. Required body params are still required unless -R option passed. Useful for dealing with incomplete specs.
+field-header FIELD_HEADER
Header Param
+field-one FIELD_ONE Demo Body String Field
+field-two FIELD_TWO [FIELD_TWO ...]
Demo Body Array Field
+field-three FIELD_THREE
Demo Body Complex Field
+path-item PATH_ITEM
- Generic Optional Args:
-p, --print-cmd Print the resulting curl command to standard out
-n, --no-run Don't run the curl command. Useful with -p
-R, --no-requires Don't check to see if required parameter values are missing or if values are one of the enumerated values
-b BODY_JSON, --body-json BODY_JSON, --body BODY_JSON
Base json object to send in the body. Required body params are still required unless -R option passed. Useful for dealing with incomplete specs.
- Relevant Environment Variables
CARL_DIR: Directory which contains files for carl. Default: ~/.carl
CARL_OPEN_API_DIR: Directory containing the OpenApi specifications and
Yaml files. Default: $CARL_DIR/open_api
CARL_CACHE_DIR: Directory containing the cache. Default $CARL_DIR/cache
Hints for finding OpenAPI specs
The spec you're interested in might be on https://app.swaggerhub.com/. Also, sometimes the doc/sandbox page, for an api, which gives you a gui for interacting with the api, loads the swagger spec in the background. You can see this if you open the developer tools in Chrome under Network
Development
Requires make:
# setting up dev environment
$ make develop
# run tests
$ make test
# ... or
$ pytest
# run tests for all environments
$ make test-all
No CI/CD or coverage yet
To Do/Future Features
- A
--query
option for adding query parameters directly - Some sort of hook infrastructure, so you could do things like have custom-completions for certain parameters or automatically add a particular env variable as an auth header
- Support file uploading and downloading
- Utilize the authorization part of the OpenAPI spec
- Better support for nested json objects in the body, so that
+param.sub-param value
would set{"param"{"sub-param":"value"}}
- Maybe support older versions of Swagger/OpenApi
- Speaking of which, in the code I sometimes use the term "swagger" and sometimes "open_api". I should make this consistent.
- Support bash and fish. With how I implemented this, I thought it would be easy to implement bash. But the way bash
parses and escapes arguments passed to the completion function made it surprisingly challenging. The
bash-completion
branch has my so-far attempts to deal with these issues. It might be close to done, or there might be a slew of other issues I haven't realized yet.
Credits
This package was created with cookiecutter and the audreyr/cookiecutter-pypackage
project template.
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