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rust.request.rs Maven / Gradle / Ivy
use std::collections::HashMap;
use std::pin::Pin;
use futures;
use futures::Future;
use futures::future::*;
use hyper;
use hyper::header::{AUTHORIZATION, CONTENT_LENGTH, CONTENT_TYPE, HeaderValue, USER_AGENT};
use serde;
use serde_json;
use super::{configuration, Error};
pub(crate) struct ApiKey {
pub in_header: bool,
pub in_query: bool,
pub param_name: String,
}
impl ApiKey {
fn key(&self, prefix: &Option, key: &str) -> String {
match prefix {
None => key.to_owned(),
Some(ref prefix) => format!("{} {}", prefix, key),
}
}
}
#[allow(dead_code)]
pub(crate) enum Auth {
None,
ApiKey(ApiKey),
Basic,
Oauth,
}
/// If the authorization type is unspecified then it will be automatically detected based
/// on the configuration. This functionality is useful when the OpenAPI definition does not
/// include an authorization scheme.
pub(crate) struct Request {
auth: Option,
method: hyper::Method,
path: String,
query_params: HashMap,
no_return_type: bool,
path_params: HashMap,
form_params: HashMap,
header_params: HashMap,
// TODO: multiple body params are possible technically, but not supported here.
serialized_body: Option,
}
#[allow(dead_code)]
impl Request {
pub fn new(method: hyper::Method, path: String) -> Self {
Request {
auth: None,
method,
path,
query_params: HashMap::new(),
path_params: HashMap::new(),
form_params: HashMap::new(),
header_params: HashMap::new(),
serialized_body: None,
no_return_type: false,
}
}
pub fn with_body_param(mut self, param: T) -> Self {
self.serialized_body = Some(serde_json::to_string(¶m).unwrap());
self
}
pub fn with_header_param(mut self, basename: String, param: String) -> Self {
self.header_params.insert(basename, param);
self
}
#[allow(unused)]
pub fn with_query_param(mut self, basename: String, param: String) -> Self {
self.query_params.insert(basename, param);
self
}
#[allow(unused)]
pub fn with_path_param(mut self, basename: String, param: String) -> Self {
self.path_params.insert(basename, param);
self
}
#[allow(unused)]
pub fn with_form_param(mut self, basename: String, param: String) -> Self {
self.form_params.insert(basename, param);
self
}
pub fn returns_nothing(mut self) -> Self {
self.no_return_type = true;
self
}
pub fn with_auth(mut self, auth: Auth) -> Self {
self.auth = Some(auth);
self
}
pub fn execute<'a, C, U>(
self,
conf: &configuration::Configuration,
) -> Pin> + 'a>>
where
C: hyper::client::connect::Connect + Clone + std::marker::Send + Sync,
U: Sized + std::marker::Send + 'a,
for<'de> U: serde::Deserialize<'de>,
{
let mut query_string = ::url::form_urlencoded::Serializer::new("".to_owned());
let mut path = self.path;
for (k, v) in self.path_params {
// replace {id} with the value of the id path param
path = path.replace(&format!("{{{}}}", k), &v);
}
for (key, val) in self.query_params {
query_string.append_pair(&key, &val);
}
let mut uri_str = format!("{}{}", conf.base_path, path);
let query_string_str = query_string.finish();
if !query_string_str.is_empty() {
uri_str += "?";
uri_str += &query_string_str;
}
let uri: hyper::Uri = match uri_str.parse() {
Err(e) => return Box::pin(futures::future::err(Error::UriError(e))),
Ok(u) => u,
};
let mut req_builder = hyper::Request::builder()
.uri(uri)
.method(self.method);
// Detect the authorization type if it hasn't been set.
let auth = self.auth.unwrap_or_else(||
if conf.api_key.is_some() {
panic!("Cannot automatically set the API key from the configuration, it must be specified in the OpenAPI definition")
} else if conf.oauth_access_token.is_some() {
Auth::Oauth
} else if conf.basic_auth.is_some() {
Auth::Basic
} else {
Auth::None
}
);
match auth {
Auth::ApiKey(apikey) => {
if let Some(ref key) = conf.api_key {
let val = apikey.key(&key.prefix, &key.key);
if apikey.in_query {
query_string.append_pair(&apikey.param_name, &val);
}
if apikey.in_header {
req_builder = req_builder.header(&apikey.param_name, val);
}
}
}
Auth::Basic => {
if let Some(ref auth_conf) = conf.basic_auth {
let mut text = auth_conf.0.clone();
text.push(':');
if let Some(ref pass) = auth_conf.1 {
text.push_str(&pass[..]);
}
let encoded = base64::encode(&text);
req_builder = req_builder.header(AUTHORIZATION, encoded);
}
}
Auth::Oauth => {
if let Some(ref token) = conf.oauth_access_token {
let text = "Bearer ".to_owned() + token;
req_builder = req_builder.header(AUTHORIZATION, text);
}
}
Auth::None => {}
}
if let Some(ref user_agent) = conf.user_agent {
req_builder = req_builder.header(USER_AGENT, match HeaderValue::from_str(user_agent) {
Ok(header_value) => header_value,
Err(e) => return Box::pin(futures::future::err(super::Error::Header(e)))
});
}
for (k, v) in self.header_params {
req_builder = req_builder.header(&k, v);
}
let req_headers = req_builder.headers_mut().unwrap();
let request_result = if self.form_params.len() > 0 {
req_headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/x-www-form-urlencoded"));
let mut enc = ::url::form_urlencoded::Serializer::new("".to_owned());
for (k, v) in self.form_params {
enc.append_pair(&k, &v);
}
req_builder.body(hyper::Body::from(enc.finish()))
} else if let Some(body) = self.serialized_body {
req_headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
req_headers.insert(CONTENT_LENGTH, body.len().into());
req_builder.body(hyper::Body::from(body))
} else {
req_builder.body(hyper::Body::default())
};
let request = match request_result {
Ok(request) => request,
Err(e) => return Box::pin(futures::future::err(Error::from(e)))
};
let no_return_type = self.no_return_type;
Box::pin(conf.client
.request(request)
.map_err(|e| Error::from(e))
.and_then(move |response| {
let status = response.status();
if !status.is_success() {
futures::future::err::(Error::from((status, response.into_body()))).boxed()
} else if no_return_type {
// This is a hack; if there's no_ret_type, U is (), but serde_json gives an
// error when deserializing "" into (), so deserialize 'null' into it
// instead.
// An alternate option would be to require U: Default, and then return
// U::default() here instead since () implements that, but then we'd
// need to impl default for all models.
futures::future::ok::(serde_json::from_str("null").expect("serde null value")).boxed()
} else {
hyper::body::to_bytes(response.into_body())
.map(|bytes| serde_json::from_slice(&bytes.unwrap()))
.map_err(|e| Error::from(e)).boxed()
}
}))
}
}
