mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-29 15:22:07 +00:00
737 lines
22 KiB
Rust
737 lines
22 KiB
Rust
// Copyright (C) 2016-2018 Sebastian Dröge <sebastian@centricular.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use bytes::Bytes;
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use futures::future::Either;
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use futures::sync::oneshot;
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use futures::{Future, Stream};
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use hyperx::header::{
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AcceptRanges, ByteRangeSpec, ContentLength, ContentRange, ContentRangeSpec, Headers, Range,
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RangeUnit, UserAgent,
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};
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use reqwest::r#async::{Client, Decoder};
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use reqwest::StatusCode;
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use std::mem;
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use std::sync::Mutex;
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use std::time::Duration;
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use std::u64;
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use tokio::prelude::*;
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use tokio::runtime;
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use url::Url;
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use glib;
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use glib::subclass;
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use glib::subclass::prelude::*;
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use gst;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use gst_base;
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use gst_base::prelude::*;
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use gst_base::subclass::prelude::*;
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const DEFAULT_LOCATION: Option<Url> = None;
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const DEFAULT_USER_AGENT: &str = concat!(
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"GStreamer reqwesthttpsrc ",
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env!("CARGO_PKG_VERSION"),
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"-",
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env!("COMMIT_ID")
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);
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const DEFAULT_IS_LIVE: bool = false;
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const DEFAULT_TIMEOUT: u32 = 15;
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#[derive(Debug, Clone)]
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struct Settings {
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location: Option<Url>,
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user_agent: String,
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user_id: Option<String>,
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user_pw: Option<String>,
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timeout: u32,
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}
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impl Default for Settings {
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fn default() -> Self {
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Settings {
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location: DEFAULT_LOCATION,
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user_agent: DEFAULT_USER_AGENT.into(),
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user_id: None,
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user_pw: None,
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timeout: DEFAULT_TIMEOUT,
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}
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}
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}
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static PROPERTIES: [subclass::Property; 6] = [
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subclass::Property("location", |name| {
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glib::ParamSpec::string(
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name,
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"Location",
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"URL to read from",
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None,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("user-agent", |name| {
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glib::ParamSpec::string(
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name,
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"User-Agent",
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"Value of the User-Agent HTTP request header field",
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DEFAULT_USER_AGENT.into(),
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("is-live", |name| {
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glib::ParamSpec::boolean(
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name,
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"Is Live",
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"Act like a live source",
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DEFAULT_IS_LIVE,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("user-id", |name| {
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glib::ParamSpec::string(
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name,
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"User-id",
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"HTTP location URI user id for authentication",
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None,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("user-pw", |name| {
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glib::ParamSpec::string(
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name,
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"User-pw",
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"HTTP location URI user password for authentication",
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None,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("timeout", |name| {
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glib::ParamSpec::uint(
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name,
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"Timeout",
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"Value in seconds to timeout a blocking I/O (0 = No timeout).",
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0,
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3600,
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DEFAULT_TIMEOUT,
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glib::ParamFlags::READWRITE,
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)
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}),
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];
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#[derive(Debug)]
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enum State {
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Stopped,
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Started {
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uri: Url,
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body: Option<Decoder>,
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seekable: bool,
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position: u64,
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size: Option<u64>,
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start: u64,
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stop: Option<u64>,
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},
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}
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impl Default for State {
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fn default() -> Self {
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State::Stopped
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}
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}
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#[derive(Debug)]
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pub struct ReqwestHttpSrc {
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cat: gst::DebugCategory,
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client: Client,
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settings: Mutex<Settings>,
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state: Mutex<State>,
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runtime: runtime::Runtime,
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canceller: Mutex<Option<oneshot::Sender<Bytes>>>,
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}
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impl ReqwestHttpSrc {
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fn set_location(
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&self,
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_element: &gst_base::BaseSrc,
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uri: Option<&str>,
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) -> Result<(), glib::Error> {
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let state = self.state.lock().unwrap();
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if let State::Started { .. } = *state {
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return Err(glib::Error::new(
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gst::URIError::BadState,
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"Changing the `location` property on a started `reqwesthttpsrc` is not supported",
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));
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}
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let mut settings = self.settings.lock().unwrap();
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if uri.is_none() {
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settings.location = DEFAULT_LOCATION;
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return Ok(());
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}
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let uri = uri.unwrap();
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let uri = Url::parse(uri).map_err(|err| {
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glib::Error::new(
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gst::URIError::BadUri,
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format!("Failed to parse URI '{}': {:?}", uri, err,).as_str(),
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)
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})?;
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if uri.scheme() != "http" && uri.scheme() != "https" {
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return Err(glib::Error::new(
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gst::URIError::UnsupportedProtocol,
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format!("Unsupported URI scheme '{}'", uri.scheme(),).as_str(),
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));
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}
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settings.location = Some(uri);
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Ok(())
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}
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fn do_request(
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&self,
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src: &gst_base::BaseSrc,
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uri: Url,
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start: u64,
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stop: Option<u64>,
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) -> Result<State, gst::ErrorMessage> {
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let cat = self.cat;
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let req = self.client.get(uri.clone());
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let settings = self.settings.lock().unwrap().clone();
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let mut headers = Headers::new();
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match (start != 0, stop) {
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(false, None) => (),
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(true, None) => {
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headers.set(Range::Bytes(vec![ByteRangeSpec::AllFrom(start)]));
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}
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(_, Some(stop)) => {
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headers.set(Range::Bytes(vec![ByteRangeSpec::FromTo(start, stop - 1)]));
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}
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}
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headers.set(UserAgent::new(settings.user_agent.to_owned()));
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// Add all headers for the request here
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let req = req.headers(headers.into());
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let req = if let Some(user_id) = settings.user_id {
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// HTTP auth available
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req.basic_auth(user_id, settings.user_pw)
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} else {
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req
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};
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gst_debug!(cat, obj: src, "Doing new request {:?}", req);
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let src_clone = src.clone();
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let response_fut = req.send().and_then(move |res| {
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gst_debug!(cat, obj: &src_clone, "Response received: {:?}", res);
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Ok(res)
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});
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let uri_clone = uri.clone();
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let mut response = self
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.wait(response_fut.map_err(move |err| {
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gst_error_msg!(
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gst::ResourceError::Read,
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["Failed to fetch {}: {:?}", uri_clone, err]
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)
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}))
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.map_err(|err| {
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err.unwrap_or_else(|| {
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gst_error_msg!(gst::LibraryError::Failed, ["Interrupted during start"])
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})
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})?;
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if !response.status().is_success() {
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match response.status() {
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StatusCode::NOT_FOUND => {
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gst_error!(cat, obj: src, "Request status failed: {:?}", response);
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return Err(gst_error_msg!(
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gst::ResourceError::NotFound,
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["Request status failed for {}: {}", uri, response.status()]
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));
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}
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StatusCode::UNAUTHORIZED
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| StatusCode::PAYMENT_REQUIRED
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| StatusCode::FORBIDDEN
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| StatusCode::PROXY_AUTHENTICATION_REQUIRED => {
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gst_error!(cat, obj: src, "Request status failed: {:?}", response);
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return Err(gst_error_msg!(
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gst::ResourceError::NotAuthorized,
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["Request status failed for {}: {}", uri, response.status()]
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));
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}
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_ => {
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gst_error!(cat, obj: src, "Request status failed: {:?}", response);
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return Err(gst_error_msg!(
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gst::ResourceError::OpenRead,
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["Request status failed for {}: {}", uri, response.status()]
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));
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}
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}
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}
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let headers = Headers::from(response.headers());
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let size = headers.get().map(|&ContentLength(cl)| cl + start);
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let accept_byte_ranges = if let Some(&AcceptRanges(ref ranges)) = headers.get() {
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ranges.iter().any(|u| *u == RangeUnit::Bytes)
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} else {
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false
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};
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let seekable = size.is_some() && accept_byte_ranges;
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let position = if let Some(&ContentRange(ContentRangeSpec::Bytes {
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range: Some((range_start, _)),
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..
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})) = headers.get()
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{
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range_start
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} else {
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0
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};
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if position != start {
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return Err(gst_error_msg!(
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gst::ResourceError::Seek,
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["Failed to seek to {}: Got {}", start, position]
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));
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}
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gst_debug!(cat, obj: src, "Request successful: {:?}", response);
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let body = mem::replace(response.body_mut(), Decoder::empty());
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Ok(State::Started {
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uri,
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body: Some(body),
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seekable,
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position,
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size,
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start,
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stop,
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})
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}
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fn wait<F>(&self, future: F) -> Result<F::Item, Option<gst::ErrorMessage>>
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where
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F: Send + Future<Error = gst::ErrorMessage> + 'static,
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F::Item: Send,
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{
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let timeout = self.settings.lock().unwrap().timeout;
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let mut canceller = self.canceller.lock().unwrap();
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let (sender, receiver) = oneshot::channel::<Bytes>();
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canceller.replace(sender);
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// wrapping timeout around future
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let future_timeout = if timeout == 0 {
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Either::A(future)
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} else {
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Either::B(
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future
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.timeout(Duration::from_secs(timeout.into()))
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.map_err(|_err| gst_error_msg!(gst::ResourceError::Read, ["Request timeout"])),
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)
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};
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let unlock_error = gst_error_msg!(gst::ResourceError::Busy, ["unlock"]);
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let res = oneshot::spawn(future_timeout, &self.runtime.executor())
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.select(receiver.then(|_| Err(unlock_error.clone())))
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.wait()
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.map(|v| v.0)
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.map_err(|err| {
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if err.0 == unlock_error {
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None
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} else {
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Some(err.0)
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}
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});
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/* Clear out the canceller */
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*canceller = None;
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res
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}
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}
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impl ObjectImpl for ReqwestHttpSrc {
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glib_object_impl!();
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fn set_property(&self, obj: &glib::Object, id: usize, value: &glib::Value) {
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let prop = &PROPERTIES[id];
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match *prop {
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subclass::Property("location", ..) => {
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let element = obj.downcast_ref::<gst_base::BaseSrc>().unwrap();
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let location = value.get::<&str>().expect("type checked upstream");
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if let Err(err) = self.set_location(element, location) {
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gst_error!(
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self.cat,
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obj: element,
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"Failed to set property `location`: {:?}",
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err
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);
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}
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}
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subclass::Property("user-agent", ..) => {
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let mut settings = self.settings.lock().unwrap();
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let user_agent = value
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.get()
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.expect("type checked upstream")
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.unwrap_or_else(|| DEFAULT_USER_AGENT.into());
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settings.user_agent = user_agent;
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}
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subclass::Property("is-live", ..) => {
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let element = obj.downcast_ref::<gst_base::BaseSrc>().unwrap();
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let is_live = value.get_some().expect("type checked upstream");
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element.set_live(is_live);
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}
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subclass::Property("user-id", ..) => {
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let mut settings = self.settings.lock().unwrap();
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let user_id = value.get().expect("type checked upstream");
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settings.user_id = user_id;
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}
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subclass::Property("user-pw", ..) => {
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let mut settings = self.settings.lock().unwrap();
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let user_pw = value.get().expect("type checked upstream");
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settings.user_pw = user_pw;
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}
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subclass::Property("timeout", ..) => {
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let mut settings = self.settings.lock().unwrap();
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let timeout = value.get_some().expect("type checked upstream");
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settings.timeout = timeout;
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}
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_ => unimplemented!(),
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};
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}
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fn get_property(&self, obj: &glib::Object, id: usize) -> Result<glib::Value, ()> {
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let prop = &PROPERTIES[id];
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match *prop {
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subclass::Property("location", ..) => {
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let settings = self.settings.lock().unwrap();
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let location = settings.location.as_ref().map(Url::to_string);
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Ok(location.to_value())
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}
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subclass::Property("user-agent", ..) => {
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let settings = self.settings.lock().unwrap();
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Ok(settings.user_agent.to_value())
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}
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subclass::Property("is-live", ..) => {
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let element = obj.downcast_ref::<gst_base::BaseSrc>().unwrap();
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Ok(element.is_live().to_value())
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}
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subclass::Property("user-id", ..) => {
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let settings = self.settings.lock().unwrap();
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Ok(settings.user_id.to_value())
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}
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subclass::Property("user-pw", ..) => {
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let settings = self.settings.lock().unwrap();
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Ok(settings.user_pw.to_value())
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}
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subclass::Property("timeout", ..) => {
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let settings = self.settings.lock().unwrap();
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Ok(settings.timeout.to_value())
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}
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_ => unimplemented!(),
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}
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}
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fn constructed(&self, obj: &glib::Object) {
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self.parent_constructed(obj);
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let element = obj.downcast_ref::<gst_base::BaseSrc>().unwrap();
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element.set_automatic_eos(false);
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element.set_format(gst::Format::Bytes);
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}
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}
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impl ElementImpl for ReqwestHttpSrc {}
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impl BaseSrcImpl for ReqwestHttpSrc {
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fn is_seekable(&self, _src: &gst_base::BaseSrc) -> bool {
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match *self.state.lock().unwrap() {
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State::Started { seekable, .. } => seekable,
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_ => false,
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}
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}
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fn get_size(&self, _src: &gst_base::BaseSrc) -> Option<u64> {
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match *self.state.lock().unwrap() {
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State::Started { size, .. } => size,
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_ => None,
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}
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}
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fn start(&self, src: &gst_base::BaseSrc) -> Result<(), gst::ErrorMessage> {
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let mut state = self.state.lock().unwrap();
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*state = State::Stopped;
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let uri = self
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.settings
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.lock()
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.unwrap()
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.location
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.as_ref()
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.ok_or_else(|| {
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gst_error_msg!(gst::CoreError::StateChange, ["Can't start without an URI"])
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})
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.map(|uri| uri.clone())?;
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*state = self.do_request(src, uri, 0, None)?;
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Ok(())
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}
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fn stop(&self, _src: &gst_base::BaseSrc) -> Result<(), gst::ErrorMessage> {
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*self.state.lock().unwrap() = State::Stopped;
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Ok(())
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}
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fn do_seek(&self, src: &gst_base::BaseSrc, segment: &mut gst::Segment) -> bool {
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let segment = segment.downcast_mut::<gst::format::Bytes>().unwrap();
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let mut state = self.state.lock().unwrap();
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let (position, old_stop, uri) = match *state {
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State::Started {
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position,
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stop,
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ref uri,
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..
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} => (position, stop, uri.clone()),
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State::Stopped => {
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gst_element_error!(src, gst::LibraryError::Failed, ["Not started yet"]);
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return false;
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}
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};
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let start = segment.get_start().expect("No start position given");
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let stop = segment.get_stop();
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if position == start && old_stop == stop.0 {
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return true;
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}
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*state = State::Stopped;
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match self.do_request(src, uri, start, stop.0) {
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Ok(s) => {
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*state = s;
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true
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}
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Err(err) => {
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src.post_error_message(&err);
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false
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}
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}
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}
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|
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fn create(
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&self,
|
|
src: &gst_base::BaseSrc,
|
|
offset: u64,
|
|
_length: u32,
|
|
) -> Result<gst::Buffer, gst::FlowError> {
|
|
let cat = self.cat;
|
|
let mut state = self.state.lock().unwrap();
|
|
|
|
let (body, position) = match *state {
|
|
State::Started {
|
|
ref mut body,
|
|
ref mut position,
|
|
..
|
|
} => (body, position),
|
|
State::Stopped => {
|
|
gst_element_error!(src, gst::LibraryError::Failed, ["Not started yet"]);
|
|
|
|
return Err(gst::FlowError::Error);
|
|
}
|
|
};
|
|
|
|
if *position != offset {
|
|
gst_element_error!(
|
|
src,
|
|
gst::ResourceError::Seek,
|
|
["Got unexpected offset {}, expected {}", offset, position]
|
|
);
|
|
|
|
return Err(gst::FlowError::Error);
|
|
}
|
|
|
|
let current_body = match body.take() {
|
|
Some(body) => body,
|
|
None => {
|
|
gst_error!(self.cat, obj: src, "Don't have a response body");
|
|
gst_element_error!(
|
|
src,
|
|
gst::ResourceError::Read,
|
|
["Don't have a response body"]
|
|
);
|
|
|
|
return Err(gst::FlowError::Error);
|
|
}
|
|
};
|
|
|
|
drop(state);
|
|
let res = self.wait(current_body.into_future().map_err(|(err, _body)| {
|
|
gst_error_msg!(
|
|
gst::ResourceError::Read,
|
|
["Failed to read chunk: {:?}", err]
|
|
)
|
|
}));
|
|
|
|
let mut state = self.state.lock().unwrap();
|
|
let (body, position) = match *state {
|
|
State::Started {
|
|
ref mut body,
|
|
ref mut position,
|
|
..
|
|
} => (body, position),
|
|
State::Stopped => {
|
|
gst_element_error!(src, gst::LibraryError::Failed, ["Not started yet"]);
|
|
|
|
return Err(gst::FlowError::Error);
|
|
}
|
|
};
|
|
|
|
match res {
|
|
Ok((Some(chunk), current_body)) => {
|
|
/* do something with the chunk and store the body again in the state */
|
|
|
|
gst_debug!(cat, obj: src, "Data Received {:?}", chunk);
|
|
let size = chunk.len();
|
|
assert_ne!(chunk.len(), 0);
|
|
|
|
*position += size as u64;
|
|
|
|
let mut buffer = gst::Buffer::from_slice(chunk);
|
|
|
|
*body = Some(current_body);
|
|
|
|
{
|
|
let buffer = buffer.get_mut().unwrap();
|
|
buffer.set_offset(offset);
|
|
}
|
|
|
|
Ok(buffer)
|
|
}
|
|
Ok((None, current_body)) => {
|
|
/* No further data, end of stream */
|
|
gst_debug!(cat, obj: src, "End of stream");
|
|
*body = Some(current_body);
|
|
Err(gst::FlowError::Eos)
|
|
}
|
|
Err(err) => {
|
|
/* error */
|
|
|
|
gst_error!(self.cat, obj: src, "Failed to read: {:?}", err);
|
|
gst_element_error!(
|
|
src,
|
|
gst::ResourceError::Read,
|
|
["Failed to read at {}: {:?}", offset, err]
|
|
);
|
|
|
|
Err(gst::FlowError::Error)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl URIHandlerImpl for ReqwestHttpSrc {
|
|
fn get_uri(&self, _element: &gst::URIHandler) -> Option<String> {
|
|
let settings = self.settings.lock().unwrap();
|
|
|
|
settings.location.as_ref().map(Url::to_string)
|
|
}
|
|
|
|
fn set_uri(&self, element: &gst::URIHandler, uri: &str) -> Result<(), glib::Error> {
|
|
let element = element.dynamic_cast_ref::<gst_base::BaseSrc>().unwrap();
|
|
|
|
self.set_location(&element, Some(uri))
|
|
}
|
|
|
|
fn get_uri_type() -> gst::URIType {
|
|
gst::URIType::Src
|
|
}
|
|
|
|
fn get_protocols() -> Vec<String> {
|
|
vec!["http".to_string(), "https".to_string()]
|
|
}
|
|
}
|
|
|
|
impl ObjectSubclass for ReqwestHttpSrc {
|
|
const NAME: &'static str = "ReqwestHttpSrc";
|
|
type ParentType = gst_base::BaseSrc;
|
|
type Instance = gst::subclass::ElementInstanceStruct<Self>;
|
|
type Class = subclass::simple::ClassStruct<Self>;
|
|
|
|
glib_object_subclass!();
|
|
|
|
fn new() -> Self {
|
|
Self {
|
|
cat: gst::DebugCategory::new(
|
|
"reqwesthttpsrc",
|
|
gst::DebugColorFlags::empty(),
|
|
Some("Rust HTTP source"),
|
|
),
|
|
client: Client::new(),
|
|
settings: Mutex::new(Default::default()),
|
|
state: Mutex::new(Default::default()),
|
|
runtime: runtime::Builder::new()
|
|
.core_threads(1)
|
|
.name_prefix("gst-http-tokio")
|
|
.build()
|
|
.unwrap(),
|
|
canceller: Mutex::new(None),
|
|
}
|
|
}
|
|
|
|
fn type_init(type_: &mut subclass::InitializingType<Self>) {
|
|
type_.add_interface::<gst::URIHandler>();
|
|
}
|
|
|
|
fn class_init(klass: &mut subclass::simple::ClassStruct<Self>) {
|
|
klass.set_metadata(
|
|
"HTTP Source",
|
|
"Source/Network/HTTP",
|
|
"Read stream from an HTTP/HTTPS location",
|
|
"Sebastian Dröge <sebastian@centricular.com>",
|
|
);
|
|
|
|
let caps = gst::Caps::new_any();
|
|
let src_pad_template = gst::PadTemplate::new(
|
|
"src",
|
|
gst::PadDirection::Src,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
)
|
|
.unwrap();
|
|
klass.add_pad_template(src_pad_template);
|
|
|
|
klass.install_properties(&PROPERTIES);
|
|
}
|
|
}
|
|
|
|
pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
|
|
gst::Element::register(
|
|
Some(plugin),
|
|
"reqwesthttpsrc",
|
|
gst::Rank::Marginal,
|
|
ReqwestHttpSrc::get_type(),
|
|
)
|
|
}
|