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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use crate::http_util::create_http_client;
use deno_core::error::bad_resource_id;
use deno_core::error::type_error;
use deno_core::error::AnyError;
use deno_core::url;
use deno_core::BufVec;
use deno_core::OpState;
use deno_core::ZeroCopyBuf;
use http::header::HeaderName;
use http::header::HeaderValue;
use http::Method;
use reqwest::Client;
use reqwest::Response;
use serde::Deserialize;
use serde_json::Value;
use std::cell::RefCell;
use std::convert::From;
use std::path::PathBuf;
use std::rc::Rc;
pub fn init(rt: &mut deno_core::JsRuntime) {
super::reg_json_async(rt, "op_fetch", op_fetch);
super::reg_json_async(rt, "op_fetch_read", op_fetch_read);
super::reg_json_sync(rt, "op_create_http_client", op_create_http_client);
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
struct FetchArgs {
method: Option<String>,
url: String,
headers: Vec<(String, String)>,
client_rid: Option<u32>,
}
async fn op_fetch(
state: Rc<RefCell<OpState>>,
args: Value,
data: BufVec,
) -> Result<Value, AnyError> {
let args: FetchArgs = serde_json::from_value(args)?;
let url = args.url;
let client = if let Some(rid) = args.client_rid {
let state = state.borrow();
let r = state
.resource_table
.get::<HttpClientResource>(rid)
.ok_or_else(bad_resource_id)?;
r.client.clone()
} else {
let state_ = state.borrow();
let client = state_.borrow::<reqwest::Client>();
client.clone()
};
let method = match args.method {
Some(method_str) => Method::from_bytes(method_str.as_bytes())?,
None => Method::GET,
};
let url_ = url::Url::parse(&url)?;
// Check scheme before asking for net permission
let scheme = url_.scheme();
if scheme != "http" && scheme != "https" {
return Err(type_error(format!("scheme '{}' not supported", scheme)));
}
super::cli_state2(&state).check_net_url(&url_)?;
let mut request = client.request(method, url_);
match data.len() {
0 => {}
1 => request = request.body(Vec::from(&*data[0])),
_ => panic!("Invalid number of arguments"),
}
for (key, value) in args.headers {
let name = HeaderName::from_bytes(key.as_bytes()).unwrap();
let v = HeaderValue::from_str(&value).unwrap();
request = request.header(name, v);
}
debug!("Before fetch {}", url);
let res = request.send().await?;
debug!("Fetch response {}", url);
let status = res.status();
let mut res_headers = Vec::new();
for (key, val) in res.headers().iter() {
res_headers.push((key.to_string(), val.to_str().unwrap().to_owned()));
}
let rid = state
.borrow_mut()
.resource_table
.add("httpBody", Box::new(res));
Ok(json!({
"bodyRid": rid,
"status": status.as_u16(),
"statusText": status.canonical_reason().unwrap_or(""),
"headers": res_headers
}))
}
async fn op_fetch_read(
state: Rc<RefCell<OpState>>,
args: Value,
_data: BufVec,
) -> Result<Value, AnyError> {
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
struct Args {
rid: u32,
}
let args: Args = serde_json::from_value(args)?;
let rid = args.rid;
use futures::future::poll_fn;
use futures::ready;
use futures::FutureExt;
let f = poll_fn(move |cx| {
let mut state = state.borrow_mut();
let response = state
.resource_table
.get_mut::<Response>(rid as u32)
.ok_or_else(bad_resource_id)?;
let mut chunk_fut = response.chunk().boxed_local();
let r = ready!(chunk_fut.poll_unpin(cx))?;
if let Some(chunk) = r {
Ok(json!({ "chunk": &*chunk })).into()
} else {
Ok(json!({ "chunk": null })).into()
}
});
f.await
/*
// I'm programming this as I want it to be programmed, even though it might be
// incorrect, normally we would use poll_fn here. We need to make this await pattern work.
let chunk = response.chunk().await?;
if let Some(chunk) = chunk {
// TODO(ry) This is terribly inefficient. Make this zero-copy.
Ok(json!({ "chunk": &*chunk }))
} else {
Ok(json!({ "chunk": null }))
}
*/
}
struct HttpClientResource {
client: Client,
}
impl HttpClientResource {
fn new(client: Client) -> Self {
Self { client }
}
}
#[derive(Deserialize, Default, Debug)]
#[serde(rename_all = "camelCase")]
#[serde(default)]
struct CreateHttpClientOptions {
ca_file: Option<String>,
}
fn op_create_http_client(
state: &mut OpState,
args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
let args: CreateHttpClientOptions = serde_json::from_value(args)?;
if let Some(ca_file) = args.ca_file.clone() {
super::cli_state(state).check_read(&PathBuf::from(ca_file))?;
}
let client = create_http_client(args.ca_file.as_deref()).unwrap();
let rid = state
.resource_table
.add("httpClient", Box::new(HttpClientResource::new(client)));
Ok(json!(rid))
}
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