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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use super::dispatch_json::{Deserialize, JsonOp, Value};
use super::io::{StreamResource, StreamResourceHolder};
use crate::http_util::{create_http_client, HttpBody};
use crate::op_error::OpError;
use crate::state::State;
use deno_core::CoreIsolate;
use deno_core::CoreIsolateState;
use deno_core::ZeroCopyBuf;
use futures::future::FutureExt;
use http::header::HeaderName;
use http::header::HeaderValue;
use http::Method;
use reqwest::Client;
use std::convert::From;
use std::path::PathBuf;
use std::rc::Rc;
pub fn init(i: &mut CoreIsolate, s: &Rc<State>) {
i.register_op("op_fetch", s.stateful_json_op2(op_fetch));
i.register_op(
"op_create_http_client",
s.stateful_json_op2(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>,
}
pub fn op_fetch(
isolate_state: &mut CoreIsolateState,
state: &Rc<State>,
args: Value,
data: &mut [ZeroCopyBuf],
) -> Result<JsonOp, OpError> {
let args: FetchArgs = serde_json::from_value(args)?;
let url = args.url;
let resource_table_ = isolate_state.resource_table.borrow();
let mut client_ref_mut;
let client = if let Some(rid) = args.client_rid {
let r = resource_table_
.get::<HttpClientResource>(rid)
.ok_or_else(OpError::bad_resource_id)?;
&r.client
} else {
client_ref_mut = state.http_client.borrow_mut();
&mut *client_ref_mut
};
let method = match args.method {
Some(method_str) => Method::from_bytes(method_str.as_bytes())
.map_err(|e| OpError::other(e.to_string()))?,
None => Method::GET,
};
let url_ = url::Url::parse(&url).map_err(OpError::from)?;
// Check scheme before asking for net permission
let scheme = url_.scheme();
if scheme != "http" && scheme != "https" {
return Err(OpError::type_error(format!(
"scheme '{}' not supported",
scheme
)));
}
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 resource_table = isolate_state.resource_table.clone();
let future = async move {
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 body = HttpBody::from(res);
let mut resource_table = resource_table.borrow_mut();
let rid = resource_table.add(
"httpBody",
Box::new(StreamResourceHolder::new(StreamResource::HttpBody(
Box::new(body),
))),
);
let json_res = json!({
"bodyRid": rid,
"status": status.as_u16(),
"statusText": status.canonical_reason().unwrap_or(""),
"headers": res_headers
});
Ok(json_res)
};
Ok(JsonOp::Async(future.boxed_local()))
}
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(
isolate_state: &mut CoreIsolateState,
state: &Rc<State>,
args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<JsonOp, OpError> {
let args: CreateHttpClientOptions = serde_json::from_value(args)?;
let mut resource_table = isolate_state.resource_table.borrow_mut();
if let Some(ca_file) = args.ca_file.clone() {
state.check_read(&PathBuf::from(ca_file))?;
}
let client = create_http_client(args.ca_file.as_deref()).unwrap();
let rid =
resource_table.add("httpClient", Box::new(HttpClientResource::new(client)));
Ok(JsonOp::Sync(json!(rid)))
}
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