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use reqwest;
use serde::de::DeserializeOwned;
use serde_json;
use std::collections::HashMap;
use std::io::Read;
use std::iter::FromIterator;
use std::path::Path;
use std::thread::sleep;
use std::time::Duration;
use url::Url;
use errors::*;
use multipart_form_data;
use resource::{self, Id, Resource, Source, source};
lazy_static! {
static ref BIGML_URL: Url = Url::parse("https://bigml.io/")
.expect("Cannot parse BigML URL in source code");
}
pub struct Client {
username: String,
api_key: String,
}
impl Client {
pub fn new<S1, S2>(username: S1, api_key: S2) -> Result<Client>
where S1: Into<String>, S2: Into<String>
{
Ok(Client {
username: username.into(),
api_key: api_key.into(),
})
}
fn auth(&self) -> String {
format!("username={};api_key={}", self.username, self.api_key)
}
fn url(&self, path: &str) -> Url {
let mut url: Url = BIGML_URL.clone();
url.set_path(path);
url.set_query(Some(&self.auth()));
url
}
pub fn create<Args>(&self, args: &Args) -> Result<Args::Resource>
where Args: resource::Args
{
let url = self.url(Args::Resource::create_path());
debug!("POST {} {:#?}", Args::Resource::create_path(), &serde_json::to_string(args));
let mkerr = || ErrorKind::CouldNotAccessUrl(url.clone());
let client = reqwest::Client::new()
.chain_err(&mkerr)?;
let res = client.post(url.clone())
.chain_err(&mkerr)?
.json(args)
.chain_err(&mkerr)?
.send()
.chain_err(&mkerr)?;
self.handle_response(res).chain_err(&mkerr)
}
pub fn create_and_wait<Args>(&self, args: &Args) -> Result<Args::Resource>
where Args: resource::Args
{
self.wait(self.create(args)?.id())
}
pub fn create_source_from_path<P>(&self, path: P) -> Result<Source>
where P: AsRef<Path>
{
let path = path.as_ref();
let body = multipart_form_data::Body::new("file", path)
.chain_err(|| ErrorKind::CouldNotReadFile(path.to_owned()))?;
let url = self.url("/source");
let mkerr = || ErrorKind::CouldNotAccessUrl(url.clone());
let client = reqwest::Client::new()
.chain_err(&mkerr)?;
let res = client.post(url.clone())
.chain_err(&mkerr)?
.header(reqwest::header::ContentType(body.mime_type()))
.body(body)
.send()
.chain_err(&mkerr)?;
self.handle_response(res).chain_err(&mkerr)
}
pub fn create_source_from_path_and_wait<P>(&self, path: P) -> Result<Source>
where P: AsRef<Path>
{
let source = self.create_source_from_path(path)?;
self.wait(source.id())
}
#[doc(hidden)]
pub fn update_source_fields(&self, source: &Source) -> Result<Source> {
if let Some(ref fields) = source.fields {
#[derive(Debug, Serialize)]
struct FieldDiff {
optype: source::Optype,
}
#[derive(Debug, Serialize)]
struct SourceUpdate {
fields: HashMap<String, FieldDiff>,
}
let body = SourceUpdate {
fields: HashMap::from_iter(fields.iter().map(|(id, field)| {
(id.clone(), FieldDiff { optype: field.optype })
}))
};
let url = self.url(source.id().as_str());
let mkerr = || ErrorKind::CouldNotAccessUrl(url.clone());
debug!("PUT {}: {:?}", &url, &body);
let client = reqwest::Client::new()
.chain_err(&mkerr)?;
let res = client.request(reqwest::Method::Put, url.clone())
.chain_err(&mkerr)?
.json(&body)
.chain_err(&mkerr)?
.send()
.chain_err(&mkerr)?;
self.handle_response(res).chain_err(&mkerr)
} else {
Err(format!("No fields to update in {}", source.id()).into())
}
}
pub fn fetch<R: Resource>(&self, resource: &Id<R>) -> Result<R> {
let url = self.url(resource.as_str());
let mkerr = || ErrorKind::CouldNotAccessUrl(url.clone());
let client = reqwest::Client::new()
.chain_err(&mkerr)?;
let res = client.get(url.clone())
.chain_err(&mkerr)?
.send()
.chain_err(&mkerr)?;
self.handle_response(res).chain_err(&mkerr)
}
pub fn wait<R: Resource>(&self, resource: &Id<R>) -> Result<R> {
loop {
let res = self.fetch(resource)?;
if res.status().code().is_ready() {
return Ok(res);
} else if res.status().code().is_err() {
let err: Error = res.status().message().into();
let url = self.url(resource.as_str());
return Err(err)
.chain_err(|| ErrorKind::CouldNotAccessUrl(url.clone()));
}
sleep(Duration::from_secs(10));
}
}
pub fn download<R: Resource>(&self, resource: &Id<R>)
-> Result<reqwest::Response> {
let url = self.url(&format!("{}/download", &resource));
let mkerr = || ErrorKind::CouldNotAccessUrl(url.clone());
let client = reqwest::Client::new()
.chain_err(&mkerr)?;
let res = client.get(url.clone())
.chain_err(&mkerr)?
.send()
.chain_err(&mkerr)?;
if res.status().is_success() {
debug!("Downloading {}", &resource);
Ok(res)
} else {
self.response_to_err(res).chain_err(&mkerr)
}
}
pub fn delete<R: Resource>(&self, resource: &Id<R>) -> Result<()> {
let url = self.url(resource.as_str());
let mkerr = || ErrorKind::CouldNotAccessUrl(url.clone());
let client = reqwest::Client::new()
.chain_err(&mkerr)?;
let res = client.request(reqwest::Method::Delete, url.clone())
.chain_err(&mkerr)?
.send()
.chain_err(&mkerr)?;
if res.status().is_success() {
debug!("Deleted {}", &resource);
Ok(())
} else {
self.response_to_err(res).chain_err(&mkerr)
}
}
fn handle_response<T>(&self, mut res: reqwest::Response) -> Result<T>
where T: DeserializeOwned
{
if res.status().is_success() {
let mut body = String::new();
res.read_to_string(&mut body)?;
debug!("Success body: {}", &body);
let properties = serde_json::from_str(&body)?;
Ok(properties)
} else {
self.response_to_err(res)
}
}
fn response_to_err<T>(&self, mut res: reqwest::Response) -> Result<T> {
let mut body = String::new();
res.read_to_string(&mut body)?;
debug!("Error body: {}", &body);
Err(ErrorKind::UnexpectedHttpStatus(res.status().to_owned(), body).into())
}
}