docs(lib): Update docstrings for rustdoc output
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1 changed files with 63 additions and 19 deletions
82
src/lib.rs
82
src/lib.rs
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@ -2,14 +2,41 @@
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//!
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//! This library provides a simplified API over the [cURL Rust
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//! bindings][] that resemble that of higher-level libraries such as
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//! [reqwest][].
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//! [reqwest][]. All calls are synchronous.
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//!
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//! `crimp` is intended to be used in situations where HTTP client
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//! functionality is desired without adding a significant number of
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//! dependencies or sacrificing too much usability.
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//!
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//! Using `crimp` to make HTTP requests is done using a simple
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//! builder-pattern style API:
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//!
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//! ```rust
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//! use crimp::{Method, Request};
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//!
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//! let response = Request::new(Method::Get, "http://httpbin.org/get").unwrap()
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//! .user_agent("crimp test suite").unwrap()
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//! .send().unwrap();
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//!
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//! assert_eq!(response.status, 200);
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//! ```
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//!
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//! The `json` feature (enabled by default) adds support for
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//! automatically serialising and deserialising request/response
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//! bodies using `serde_json`.
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//!
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//! If a feature from the underlying cURL library is missing, the
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//! `Request::raw` method can be used as an escape hatch to deal with
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//! the handle directly. Should you find yourself doing this, please
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//! [file an issue][].
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//!
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//! `crimp` does not currently expose functionality for re-using a
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//! cURL Easy handle, meaning that keep-alive of HTTP connections and
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//! the like is not supported.
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//!
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//! [cURL Rust bindings]: https://docs.rs/curl
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//! [reqwest]: https://docs.rs/reqwest
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//! [file an issue]: https://github.com/tazjin/crimp/issues
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extern crate curl;
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@ -17,22 +44,26 @@ extern crate curl;
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#[cfg(feature = "json")] extern crate serde_json;
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use curl::easy::{Easy, List, ReadError};
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#[cfg(feature = "json")] use serde::Serialize;
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#[cfg(feature = "json")] use serde::de::DeserializeOwned;
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use std::collections::HashMap;
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use std::io::Write;
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use std::string::{FromUtf8Error, ToString};
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#[cfg(feature = "json")] use serde::Serialize;
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#[cfg(feature = "json")] use serde::de::DeserializeOwned;
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#[cfg(test)]
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mod tests;
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type CurlResult<T> = Result<T, curl::Error>;
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/// HTTP method to use for the request.
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pub enum Method {
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Get, Post, Put, Patch, Delete
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}
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/// Builder structure for an HTTP request.
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///
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/// This is the primary API-type in `crimp`. After creating a new
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/// request its parameters are modified using the various builder
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/// methods until it is consumed by `send()`.
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pub struct Request<'a> {
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handle: Easy,
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headers: List,
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@ -49,16 +80,28 @@ enum Body<'a> {
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}
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}
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/// HTTP responses structure containing response data and headers.
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///
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/// By default the `send()` function of the `Request` structure will
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/// return a `Response<Vec<u8>>`. Convenience helpers exist for
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/// decoding a string via `Response::as_string` or to a
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/// `serde`-compatible type with `Response::as_json` (if the
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/// `json`-feature is enabled).
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#[derive(Debug)]
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pub struct CurlResponse<T> {
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pub struct Response<T> {
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/// HTTP status code of the response.
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pub status: u32,
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/// HTTP headers returned from the remote.
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pub headers: HashMap<String, String>,
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/// Body data from the HTTP response.
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pub body: T,
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}
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impl <'a> Request<'a> {
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/// Initiate an HTTP request with the given method and URL.
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pub fn new(method: Method, url: &str) -> CurlResult<Self> {
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pub fn new(method: Method, url: &str) -> Result<Self, curl::Error> {
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let mut handle = Easy::new();
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handle.url(url)?;
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@ -77,20 +120,21 @@ impl <'a> Request<'a> {
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})
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}
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/// Add a header to a request.
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pub fn header(mut self, k: &str, v: &str) -> CurlResult<Self> {
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/// Add an HTTP header to a request.
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pub fn header(mut self, k: &str, v: &str) -> Result<Self, curl::Error> {
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self.headers.append(&format!("{}: {}", k, v))?;
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Ok(self)
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}
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/// Set the User-Agent for this request.
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pub fn user_agent<'b: 'a>(mut self, agent: &str) -> CurlResult<Self> {
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/// Set the `User-Agent` for this request. By default this will be
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/// set to cURL's standard user agent.
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pub fn user_agent<'b: 'a>(mut self, agent: &str) -> Result<Self, curl::Error> {
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self.handle.useragent(agent)?;
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Ok(self)
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}
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/// Add a byte-array body to a request using the specified
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/// Content-Type.
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/// `Content-Type`.
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pub fn body(mut self, content_type: &'a str, data: &'a [u8]) -> Self {
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self.body = Body::Bytes { data, content_type };
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self
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@ -106,7 +150,7 @@ impl <'a> Request<'a> {
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/// Send the HTTP request and return a response structure
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/// containing the raw body.
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pub fn send(mut self) -> CurlResult<CurlResponse<Vec<u8>>> {
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pub fn send(mut self) -> Result<Response<Vec<u8>>, curl::Error> {
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// Create structures in which to store the response data:
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let mut headers = HashMap::new();
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let mut body = vec![];
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@ -191,7 +235,7 @@ impl <'a> Request<'a> {
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transfer.perform()?;
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}
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Ok(CurlResponse {
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Ok(Response {
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status: self.handle.response_code()?,
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headers,
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body
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@ -199,13 +243,13 @@ impl <'a> Request<'a> {
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}
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}
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impl CurlResponse<Vec<u8>> {
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impl Response<Vec<u8>> {
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/// Attempt to parse the HTTP response body as a UTF-8 encoded
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/// string.
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pub fn as_string(self) -> Result<CurlResponse<String>, FromUtf8Error> {
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pub fn as_string(self) -> Result<Response<String>, FromUtf8Error> {
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let body = String::from_utf8(self.body)?;
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Ok(CurlResponse {
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Ok(Response {
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body,
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status: self.status,
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headers: self.headers,
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@ -214,10 +258,10 @@ impl CurlResponse<Vec<u8>> {
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/// Attempt to deserialize the HTTP response body from JSON.
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#[cfg(feature = "json")]
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pub fn as_json<T: DeserializeOwned>(self) -> Result<CurlResponse<T>, serde_json::Error> {
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pub fn as_json<T: DeserializeOwned>(self) -> Result<Response<T>, serde_json::Error> {
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let deserialized = serde_json::from_slice(&self.body)?;
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Ok(CurlResponse {
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Ok(Response {
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body: deserialized,
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status: self.status,
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headers: self.headers,
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