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https://github.com/curlconverter/curlconverter

Transpile curl commands into Python, JavaScript and 27 other languages
https://github.com/curlconverter/curlconverter

curl tree-sitter

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Transpile curl commands into Python, JavaScript and 27 other languages

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README 

        
# [curlconverter](https://curlconverter.com)



Transpile [`curl`](https://en.wikipedia.org/wiki/CURL) commands into C, C#, ColdFusion, Clojure, Dart, Elixir, Go, HTTPie, Java, JavaScript, Julia, Kotlin, Lua, MATLAB, Objective-C, OCaml, Perl, PHP, PowerShell, Python, R, Ruby, Rust, Swift, Wget, Ansible, HAR, HTTP or JSON.



Try it on [curlconverter.com](https://curlconverter.com) or as a drop-in `curl` replacement:



```shell

$ curlconverter --data "hello=world" example.com

import requests



data = {

    'hello': 'world',

}



response = requests.post('http://example.com', data=data)

```



Features:



- Implements a lot of curl's argument parsing logic

  - Knows about all 255 curl arguments but most are ignored

  - Supports shortening `-O -v -X POST` to `-OvXPOST`

  - `--data @filename` generates code that reads that file and `@-` reads stdin

- Understands Bash syntax

  - [ANSI-C quoted](https://www.gnu.org/software/bash/manual/bash.html#ANSI_002dC-Quoting) strings

  - stdin redirects and [heredocs](https://www.gnu.org/software/bash/manual/bash.html#Here-Documents)

  - Generated code reads environment variables and runs subcommands

  - Ignores comments

  - Reports syntax errors

- Converts JSON data to native objects

- Warns about issues with the conversion



Limitations:



- Only HTTP is supported

- Code generators for other languages are less thorough than the Python generator

- curl doesn't follow redirects or decompress gzip-compressed responses by default, but the generated code will do whatever the default is for that runtime, to keep it shorter. For example Python's Requests library [follows redirects by default](https://requests.readthedocs.io/en/latest/user/quickstart/#redirection-and-history), so unless you explicitly set the redirect policy with `-L`/`--location`/`--no-location`, the generated code will not handle redirects the same way as the curl command

- Shell variables can arbitrarily change how the command would be parsed at runtime. The command `curl $VAR` can do anything, depending on what's in `$VAR`. curlconverter assumes that environment variables don't contain characters that would affect parsing

- Only simple subcommands such as `curl $(echo example.com)` work, more complicated subcommands (such as nested commands or subcommands that redirect the output) won't generate valid code

- The Bash parser doesn't support all Bash syntax

- and much more



## Install



Install the command line tool with



```sh

npm install --global curlconverter

```



Install the JavaScript library for use in your own projects with



```sh

npm install curlconverter

```



curlconverter requires Node 12+.



## Usage



### Usage from the command line



`curlconverter` acts as a drop-in replacement for curl. Take any curl command, change "`curl`" to "`curlconverter`" and it will print code instead of making the request



```shell

$ curlconverter example.com

import requests



response = requests.get('http://example.com')

```



To read the curl command from stdin, pass `-`



```shell

$ echo 'curl example.com' | curlconverter -

import requests



response = requests.get('http://example.com')

```



Choose the output language by passing `--language `. The options are



- `ansible`

- `c`

- `cfml`

- `clojure`

- `csharp`

- `dart`

- `elixir`

- `go`

- `har`

- `http`

- `httpie`

- `java`, `java-httpurlconnection`, `java-jsoup`, `java-okhttp`

- `javascript`, `javascript-jquery`, `javascript-xhr`

- `json`

- `julia`

- `kotlin`

- `lua`

- `matlab`

- `node`, `node-http`, `node-axios`, `node-got`, `node-ky`, `node-request`, `node-superagent`

- `objc`

- `ocaml`

- `perl`

- `php`, `php-guzzle`, `php-requests`

- `powershell`, `powershell-webrequest`

- `python` (the default), `python-http`

- `r`, `r-httr2`

- `ruby`

- `rust`

- `swift`

- `wget`



`--verbose` enables printing of conversion warnings and error tracebacks.



### Usage as a library



The JavaScript API is a bunch of functions that can take either a string of Bash code or an array of already-parsed arguments (like [`process.argv`](https://nodejs.org/docs/latest/api/process.html#processargv)) and return a string with the resulting program:



```js

import * as curlconverter from 'curlconverter';



curlconverter.toPython('curl example.com');

curlconverter.toPython(['curl', 'example.com']);

// "import requests\n\nresponse = requests.get('http://example.com')\n"

```



**Note**: add `"type": "module",` to your package.json for the `import` statement above to work. curlconverter must be imported as an ES module with `import` this way and not with `require()` because it uses [top-level `await`](https://v8.dev/features/top-level-await).



There's a corresponding set of functions that also return an array of warnings if there are any issues with the conversion:



```js

curlconverter.toPythonWarn('curl ftp://example.com');

curlconverter.toPythonWarn(['curl', 'ftp://example.com']);

// [

//   "import requests\n\nresponse = requests.get('ftp://example.com')\n",

//   [ [ 'bad-scheme', 'Protocol "ftp" not supported' ] ]

// ]

```



If you want to host curlconverter yourself and use it in the browser, it needs two [WASM](https://developer.mozilla.org/en-US/docs/WebAssembly) files to work, `tree-sitter.wasm` and `tree-sitter-bash.wasm`, which it will request from the root directory of your web server. If you are hosting a static website and using Webpack, you need to copy these files from the node_modules/ directory to your server's root directory in order to serve them. You can look at the [webpack.config.js](https://github.com/curlconverter/curlconverter.github.io/blob/2e1722891be22b1bb5c47976fb7873f6eb86b94d/webpack.config.js#L130-L131) for [curlconverter.com](https://curlconverter.com/) to see how this is done. You will also need to set `{module: {experiments: {topLevelAwait: true}}}` in your webpack.config.js.



### Usage in VS Code



There's a VS Code extension that adds a "Paste cURL as \" option to the right-click menu: [https://marketplace.visualstudio.com/items?itemName=curlconverter.curlconverter](https://marketplace.visualstudio.com/items?itemName=curlconverter.curlconverter). It doesn't support the same languages, curl arguments or Bash syntax as the current version because it has to [use an old version of curlconverter](https://github.com/curlconverter/curlconverter-vscode/issues/1).



## Contributing



See [CONTRIBUTING.md](./CONTRIBUTING.md)



## License



MIT © [Nick Carneiro](http://trillworks.com)