mirror of
https://github.com/denoland/deno.git
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100 lines
2.7 KiB
Rust
100 lines
2.7 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use super::dispatch_json::{Deserialize, JsonOp, Value};
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use super::io::{StreamResource, StreamResourceHolder};
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use crate::http_util::{create_http_client, HttpBody};
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use crate::op_error::OpError;
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use crate::state::State;
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use deno_core::CoreIsolate;
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use deno_core::ZeroCopyBuf;
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use futures::future::FutureExt;
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use http::header::HeaderName;
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use http::header::HeaderValue;
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use http::Method;
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use std::convert::From;
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pub fn init(i: &mut CoreIsolate, s: &State) {
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i.register_op("op_fetch", s.stateful_json_op2(op_fetch));
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}
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#[derive(Deserialize)]
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struct FetchArgs {
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method: Option<String>,
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url: String,
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headers: Vec<(String, String)>,
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}
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pub fn op_fetch(
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isolate: &mut CoreIsolate,
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state: &State,
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args: Value,
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data: Option<ZeroCopyBuf>,
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) -> Result<JsonOp, OpError> {
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let args: FetchArgs = serde_json::from_value(args)?;
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let url = args.url;
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let client =
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create_http_client(state.borrow().global_state.flags.ca_file.clone())?;
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let method = match args.method {
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Some(method_str) => Method::from_bytes(method_str.as_bytes())
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.map_err(|e| OpError::other(e.to_string()))?,
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None => Method::GET,
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};
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let url_ = url::Url::parse(&url).map_err(OpError::from)?;
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// Check scheme before asking for net permission
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let scheme = url_.scheme();
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if scheme != "http" && scheme != "https" {
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return Err(OpError::type_error(format!(
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"scheme '{}' not supported",
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scheme
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)));
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}
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state.check_net_url(&url_)?;
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let mut request = client.request(method, url_);
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if let Some(buf) = data {
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request = request.body(Vec::from(&*buf));
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}
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for (key, value) in args.headers {
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let name = HeaderName::from_bytes(key.as_bytes()).unwrap();
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let v = HeaderValue::from_str(&value).unwrap();
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request = request.header(name, v);
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}
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debug!("Before fetch {}", url);
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let resource_table = isolate.resource_table.clone();
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let future = async move {
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let res = request.send().await?;
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debug!("Fetch response {}", url);
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let status = res.status();
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let mut res_headers = Vec::new();
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for (key, val) in res.headers().iter() {
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res_headers.push((key.to_string(), val.to_str().unwrap().to_owned()));
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}
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let body = HttpBody::from(res);
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let mut resource_table = resource_table.borrow_mut();
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let rid = resource_table.add(
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"httpBody",
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Box::new(StreamResourceHolder::new(StreamResource::HttpBody(
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Box::new(body),
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))),
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);
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let json_res = json!({
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"bodyRid": rid,
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"status": status.as_u16(),
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"statusText": status.canonical_reason().unwrap_or(""),
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"headers": res_headers
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});
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Ok(json_res)
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};
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Ok(JsonOp::Async(future.boxed_local()))
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}
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