Crate cgi

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

Installation & Usage

Cargo.toml:

[dependencies]
cgi = "0.3"

Use the cgi_main! macro, with a function that takes a cgi::Request and returns a cgi::Response.

extern crate cgi;
 
cgi::cgi_main! { |request: cgi::Request| -> cgi::Response {
     cgi::text_response(200, "Hello World")
} }

If your function returns a Result, you can use cgi_try_main!:

extern crate cgi;
 
cgi::cgi_try_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 Request<u8>, 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:

extern crate cgi;
 
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;

Macros

cgi_main	Create a main function for a CGI script
cgi_try_main	Create a CGI main function based on a function which returns a Result<cgi::Response, _>

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 Definitions

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