calebmer / body-parser

JSON body parsing for iron

body-parser

Body parsing plugins for the Iron web framework.

Example

extern crate iron;
extern crate bodyparser;
extern crate persistent;

use persistent::Read;
use iron::status;
use iron::prelude::*;

// Automatically deriving from `Deserialize` requires serde_macros or serde_codegen + syntex.
// See https://github.com/serde-rs/serde for details.
#[derive(Debug, Clone, Deserialize)]
struct MyStructure {
    a: String,
    b: Option<String>,
}

fn log_body(req: &mut Request) -> IronResult<Response> {
    let body = req.get::<bodyparser::Raw>();
    match body {
        Ok(Some(body)) => println!("Read body:\n{}", body),
        Ok(None) => println!("No body"),
        Err(err) => println!("Error: {:?}", err)
    }

    let json_body = req.get::<bodyparser::Json>();
    match json_body {
        Ok(Some(json_body)) => println!("Parsed body:\n{:?}", json_body),
        Ok(None) => println!("No body"),
        Err(err) => println!("Error: {:?}", err)
    }

    let struct_body = req.get::<bodyparser::Struct<MyStructure>>();
    match struct_body {
        Ok(Some(struct_body)) => println!("Parsed body:\n{:?}", struct_body),
        Ok(None) => println!("No body"),
        Err(err) => println!("Error: {:?}", err)
    }

    Ok(Response::with(status::Ok))
}

const MAX_BODY_LENGTH: usize = 1024 * 1024 * 10;

// While the example is running, try the following curl commands and see how they are
// logged by the Rust server process:
//
// `curl -i "localhost:3000/" -H "application/json" -d '{"name":"jason","age":"2"}'`
// `curl -i "localhost:3000/" -H "application/json" -d '{"a":"jason","b":"2"}'`
// `curl -i "localhost:3000/" -H "application/json" -d '{"a":"jason"}'`
fn main() {
    let mut chain = Chain::new(log_body);
    chain.link_before(Read::<bodyparser::MaxBodyLength>::one(MAX_BODY_LENGTH));
    Iron::new(chain).http("localhost:3000").unwrap();
}

Overview

body-parser is a part of Iron's core bundle. It contains:

• Raw - performs body parsing to string with limiting.
• Json - parses body into Json.
• Struct - parses body into a struct using Serde.

Installation

If you're using a Cargo.toml to manage dependencies, just add body-parser to the toml:

[dependencies.bodyparser]

git = "https://github.com/iron/body-parser.git"

Otherwise, cargo build, and the rlib will be in your target directory.

Documentation

Along with the online documentation, you can build a local copy with make doc.

Examples

Get Help

One of us (@reem, @zzmp, @theptrk, @mcreinhard) is usually on #iron on the mozilla irc. Come say hi and ask any questions you might have. We are also usually on #rust and #rust-webdev.