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https://github.com/denoland/deno.git
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4e1abb4f3a
To better reflect changes in error types in JS from #3662 this PR changes default error type used in ops from "ErrBox" to "OpError". "OpError" is a type that can be sent over to JSON; it has all information needed to construct error in JavaScript. That made "GetErrorKind" trait useless and so it was removed altogether. To provide compatibility with previous use of "ErrBox" an implementation of "From<ErrBox> for OpError" was added, however, it is an escape hatch and ops implementors should strive to use "OpError" directly.
98 lines
2.6 KiB
Rust
98 lines
2.6 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;
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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::ops::json_op;
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use crate::state::State;
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use deno_core::*;
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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;
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use std::convert::From;
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pub fn init(i: &mut Isolate, s: &State) {
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i.register_op("fetch", s.core_op(json_op(s.stateful_op(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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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 state_ = state.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 state = state_.borrow_mut();
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let rid = state.resource_table.add(
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"httpBody",
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Box::new(StreamResource::HttpBody(Box::new(body))),
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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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