Crate cgi

Easily create CGI (RFC 3875) programmes in Rust based on hyper’s http types.

Installation & Usage

Cargo.toml:

[dependencies]
cgi2 = "0.7"

Use the [cgi::main] macro on your main function, taking in a Request and returning a Response.

#[cgi::main]
fn main(request: cgi::Request) -> cgi::Response {
     cgi::text_response(200, "Hello World")
}

This also works if you return a Result If your function returns a Result the error is printed to stderr and an HTTP 500 error is returned.

#[cgi::main]
fn main(request: cgi::Request) -> Result<cgi::Response, String> {
    let greeting = std::fs::read_to_string("greeting.txt").map_err(|_| "Couldn't open file")?;

    Ok(cgi::text_response(200, greeting))
}

It will parse & extract the CGI environmental variables and the HTTP request body to create an Request, call your function to create a response, and convert your Response into the correct format and print to stdout. If this programme is not called as CGI (e.g. missing required environmental variables), it will panic.

It is also possible to call the cgi::handle function directly inside your main function:

fn main() {
    cgi::handle(|request: cgi::Request| -> cgi::Response {
        cgi::empty_response(404)
    });
}

Several shortcut functions are provided (such as html_response/binary_response).

Re-exports

• pub extern crate http;

Functions

• binary_response
  Sends blob with that status code, and optional content type, None for no Content-Type header to be set.
• empty_response
  A HTTP Reponse with no body and that HTTP status code, e.g. return cgi::empty_response(404); to return a HTTP 404 Not Found.
• err_to_500
• handle
  Call a function as a CGI programme.
• html_response
  Converts text to bytes (UTF8) and sends that as the body with that status_code and HTML Content-Type header (text/html)
• string_response
  Convert to a string and return that with the status code
• text_response
  Serves this content as text/plain text response, with that status code

Type Aliases

• Request
  A Vec<u8> Request from http
• Response
  A Vec<u8> Response from http

Attribute Macros

• main
  Enables a CGI main function.