2022-01-07 15:23:04 +00:00
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use quick_xml::de::from_reader;
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use std::sync::Arc;
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use http::header::{
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ACCESS_CONTROL_ALLOW_HEADERS, ACCESS_CONTROL_ALLOW_METHODS, ACCESS_CONTROL_ALLOW_ORIGIN,
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ACCESS_CONTROL_EXPOSE_HEADERS, ACCESS_CONTROL_REQUEST_HEADERS, ACCESS_CONTROL_REQUEST_METHOD,
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};
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use hyper::{header::HeaderName, Body, Method, Request, Response, StatusCode};
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use serde::{Deserialize, Serialize};
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2022-05-24 10:16:39 +00:00
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use crate::s3::error::*;
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2022-05-10 11:16:57 +00:00
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use crate::s3::xml::{to_xml_with_header, xmlns_tag, IntValue, Value};
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2022-01-07 15:23:04 +00:00
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use crate::signature::verify_signed_content;
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use garage_model::bucket_table::{Bucket, CorsRule as GarageCorsRule};
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use garage_model::garage::Garage;
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use garage_util::data::*;
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2022-01-24 11:03:57 +00:00
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pub async fn handle_get_cors(bucket: &Bucket) -> Result<Response<Body>, Error> {
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2022-01-07 15:23:04 +00:00
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let param = bucket
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.params()
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.ok_or_internal_error("Bucket should not be deleted at this point")?;
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if let Some(cors) = param.cors_config.get() {
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let wc = CorsConfiguration {
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xmlns: (),
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cors_rules: cors
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.iter()
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.map(CorsRule::from_garage_cors_rule)
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.collect::<Vec<_>>(),
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};
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let xml = to_xml_with_header(&wc)?;
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Ok(Response::builder()
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.status(StatusCode::OK)
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.header(http::header::CONTENT_TYPE, "application/xml")
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.body(Body::from(xml))?)
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} else {
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Ok(Response::builder()
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.status(StatusCode::NO_CONTENT)
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.body(Body::empty())?)
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}
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}
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pub async fn handle_delete_cors(
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garage: Arc<Garage>,
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bucket_id: Uuid,
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) -> Result<Response<Body>, Error> {
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let mut bucket = garage
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2022-05-24 10:16:39 +00:00
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.bucket_helper()
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.get_existing_bucket(bucket_id)
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.await?;
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2022-01-07 15:23:04 +00:00
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2022-05-24 10:16:39 +00:00
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let param = bucket.params_mut().unwrap();
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2022-01-07 15:23:04 +00:00
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param.cors_config.update(None);
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garage.bucket_table.insert(&bucket).await?;
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Ok(Response::builder()
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.status(StatusCode::NO_CONTENT)
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.body(Body::empty())?)
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}
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pub async fn handle_put_cors(
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garage: Arc<Garage>,
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bucket_id: Uuid,
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req: Request<Body>,
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content_sha256: Option<Hash>,
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) -> Result<Response<Body>, Error> {
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let body = hyper::body::to_bytes(req.into_body()).await?;
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if let Some(content_sha256) = content_sha256 {
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verify_signed_content(content_sha256, &body[..])?;
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}
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let mut bucket = garage
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2022-05-24 10:16:39 +00:00
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.bucket_helper()
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.get_existing_bucket(bucket_id)
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.await?;
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2022-01-07 15:23:04 +00:00
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2022-05-24 10:16:39 +00:00
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let param = bucket.params_mut().unwrap();
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2022-01-07 15:23:04 +00:00
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let conf: CorsConfiguration = from_reader(&body as &[u8])?;
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conf.validate()?;
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param
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.cors_config
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.update(Some(conf.into_garage_cors_config()?));
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garage.bucket_table.insert(&bucket).await?;
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Ok(Response::builder()
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.status(StatusCode::OK)
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.body(Body::empty())?)
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}
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2022-03-01 10:15:16 +00:00
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pub async fn handle_options_s3api(
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2022-02-28 10:15:53 +00:00
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garage: Arc<Garage>,
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req: &Request<Body>,
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bucket_name: Option<String>,
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) -> Result<Response<Body>, Error> {
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2022-03-01 10:15:16 +00:00
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// FIXME: CORS rules of buckets with local aliases are
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// not taken into account.
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// If the bucket name is a global bucket name,
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// we try to apply the CORS rules of that bucket.
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// If a user has a local bucket name that has
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// the same name, its CORS rules won't be applied
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// and will be shadowed by the rules of the globally
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// existing bucket (but this is inevitable because
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// OPTIONS calls are not auhtenticated).
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if let Some(bn) = bucket_name {
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2022-02-28 10:15:53 +00:00
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let helper = garage.bucket_helper();
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2022-03-01 10:15:16 +00:00
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let bucket_id = helper.resolve_global_bucket_name(&bn).await?;
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if let Some(id) = bucket_id {
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2022-05-24 10:16:39 +00:00
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let bucket = garage.bucket_helper().get_existing_bucket(id).await?;
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2022-03-01 10:15:16 +00:00
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handle_options_for_bucket(req, &bucket)
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} else {
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// If there is a bucket name in the request, but that name
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// does not correspond to a global alias for a bucket,
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// then it's either a non-existing bucket or a local bucket.
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// We have no way of knowing, because the request is not
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// authenticated and thus we can't resolve local aliases.
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// We take the permissive approach of allowing everything,
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// because we don't want to prevent web apps that use
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// local bucket names from making API calls.
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Ok(Response::builder()
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.header(ACCESS_CONTROL_ALLOW_ORIGIN, "*")
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.header(ACCESS_CONTROL_ALLOW_METHODS, "*")
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.status(StatusCode::OK)
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.body(Body::empty())?)
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}
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2022-02-28 10:15:53 +00:00
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} else {
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2022-03-01 10:15:16 +00:00
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// If there is no bucket name in the request,
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// we are doing a ListBuckets call, which we want to allow
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// for all origins.
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Ok(Response::builder()
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2022-02-28 10:15:53 +00:00
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.header(ACCESS_CONTROL_ALLOW_ORIGIN, "*")
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.header(ACCESS_CONTROL_ALLOW_METHODS, "GET")
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.status(StatusCode::OK)
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2022-03-01 10:15:16 +00:00
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.body(Body::empty())?)
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}
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}
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2022-02-28 10:15:53 +00:00
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2022-03-01 10:15:16 +00:00
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pub fn handle_options_for_bucket(
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req: &Request<Body>,
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bucket: &Bucket,
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) -> Result<Response<Body>, Error> {
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2022-01-07 15:23:04 +00:00
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let origin = req
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.headers()
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.get("Origin")
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.ok_or_bad_request("Missing Origin header")?
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.to_str()?;
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let request_method = req
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.headers()
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.get(ACCESS_CONTROL_REQUEST_METHOD)
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.ok_or_bad_request("Missing Access-Control-Request-Method header")?
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.to_str()?;
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let request_headers = match req.headers().get(ACCESS_CONTROL_REQUEST_HEADERS) {
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Some(h) => h.to_str()?.split(',').map(|h| h.trim()).collect::<Vec<_>>(),
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None => vec![],
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};
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if let Some(cors_config) = bucket.params().unwrap().cors_config.get() {
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let matching_rule = cors_config
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.iter()
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.find(|rule| cors_rule_matches(rule, origin, request_method, request_headers.iter()));
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if let Some(rule) = matching_rule {
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let mut resp = Response::builder()
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.status(StatusCode::OK)
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.body(Body::empty())?;
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add_cors_headers(&mut resp, rule).ok_or_internal_error("Invalid CORS configuration")?;
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return Ok(resp);
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}
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}
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2022-05-24 10:16:39 +00:00
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Err(Error::forbidden("This CORS request is not allowed."))
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2022-01-07 15:23:04 +00:00
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}
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pub fn find_matching_cors_rule<'a>(
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bucket: &'a Bucket,
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req: &Request<Body>,
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) -> Result<Option<&'a GarageCorsRule>, Error> {
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if let Some(cors_config) = bucket.params().unwrap().cors_config.get() {
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if let Some(origin) = req.headers().get("Origin") {
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let origin = origin.to_str()?;
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let request_headers = match req.headers().get(ACCESS_CONTROL_REQUEST_HEADERS) {
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Some(h) => h.to_str()?.split(',').map(|h| h.trim()).collect::<Vec<_>>(),
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None => vec![],
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};
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return Ok(cors_config.iter().find(|rule| {
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2022-03-14 11:00:23 +00:00
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cors_rule_matches(rule, origin, req.method().as_ref(), request_headers.iter())
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2022-01-07 15:23:04 +00:00
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}));
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}
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}
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Ok(None)
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}
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fn cors_rule_matches<'a, HI, S>(
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rule: &GarageCorsRule,
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origin: &'a str,
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method: &'a str,
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mut request_headers: HI,
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) -> bool
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where
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HI: Iterator<Item = S>,
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S: AsRef<str>,
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{
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rule.allow_origins.iter().any(|x| x == "*" || x == origin)
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&& rule.allow_methods.iter().any(|x| x == "*" || x == method)
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&& request_headers.all(|h| {
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rule.allow_headers
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.iter()
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.any(|x| x == "*" || x == h.as_ref())
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})
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}
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pub fn add_cors_headers(
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resp: &mut Response<Body>,
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rule: &GarageCorsRule,
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) -> Result<(), http::header::InvalidHeaderValue> {
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let h = resp.headers_mut();
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h.insert(
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ACCESS_CONTROL_ALLOW_ORIGIN,
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rule.allow_origins.join(", ").parse()?,
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);
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h.insert(
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ACCESS_CONTROL_ALLOW_METHODS,
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rule.allow_methods.join(", ").parse()?,
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);
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h.insert(
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ACCESS_CONTROL_ALLOW_HEADERS,
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rule.allow_headers.join(", ").parse()?,
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);
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h.insert(
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ACCESS_CONTROL_EXPOSE_HEADERS,
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rule.expose_headers.join(", ").parse()?,
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);
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Ok(())
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}
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// ---- SERIALIZATION AND DESERIALIZATION TO/FROM S3 XML ----
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#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
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#[serde(rename = "CORSConfiguration")]
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pub struct CorsConfiguration {
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#[serde(serialize_with = "xmlns_tag", skip_deserializing)]
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pub xmlns: (),
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#[serde(rename = "CORSRule")]
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pub cors_rules: Vec<CorsRule>,
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}
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#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
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pub struct CorsRule {
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#[serde(rename = "ID")]
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pub id: Option<Value>,
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#[serde(rename = "MaxAgeSeconds")]
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pub max_age_seconds: Option<IntValue>,
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#[serde(rename = "AllowedOrigin")]
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pub allowed_origins: Vec<Value>,
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#[serde(rename = "AllowedMethod")]
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pub allowed_methods: Vec<Value>,
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#[serde(rename = "AllowedHeader", default)]
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pub allowed_headers: Vec<Value>,
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#[serde(rename = "ExposeHeader", default)]
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pub expose_headers: Vec<Value>,
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}
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#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
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pub struct AllowedMethod {
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#[serde(rename = "AllowedMethod")]
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pub allowed_method: Value,
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}
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#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
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pub struct AllowedHeader {
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#[serde(rename = "AllowedHeader")]
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pub allowed_header: Value,
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}
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#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
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pub struct ExposeHeader {
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#[serde(rename = "ExposeHeader")]
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pub expose_header: Value,
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}
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impl CorsConfiguration {
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pub fn validate(&self) -> Result<(), Error> {
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for r in self.cors_rules.iter() {
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r.validate()?;
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}
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Ok(())
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}
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pub fn into_garage_cors_config(self) -> Result<Vec<GarageCorsRule>, Error> {
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Ok(self
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.cors_rules
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.iter()
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.map(CorsRule::to_garage_cors_rule)
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.collect())
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}
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}
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impl CorsRule {
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pub fn validate(&self) -> Result<(), Error> {
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for method in self.allowed_methods.iter() {
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method
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.0
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.parse::<Method>()
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.ok_or_bad_request("Invalid CORSRule method")?;
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}
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for header in self
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.allowed_headers
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.iter()
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.chain(self.expose_headers.iter())
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{
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header
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.0
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.parse::<HeaderName>()
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.ok_or_bad_request("Invalid HTTP header name")?;
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}
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Ok(())
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}
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pub fn to_garage_cors_rule(&self) -> GarageCorsRule {
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let convert_vec =
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|vval: &[Value]| vval.iter().map(|x| x.0.to_owned()).collect::<Vec<String>>();
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GarageCorsRule {
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id: self.id.as_ref().map(|x| x.0.to_owned()),
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max_age_seconds: self.max_age_seconds.as_ref().map(|x| x.0 as u64),
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allow_origins: convert_vec(&self.allowed_origins),
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allow_methods: convert_vec(&self.allowed_methods),
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allow_headers: convert_vec(&self.allowed_headers),
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expose_headers: convert_vec(&self.expose_headers),
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}
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}
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pub fn from_garage_cors_rule(rule: &GarageCorsRule) -> Self {
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let convert_vec = |vval: &[String]| {
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vval.iter()
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.map(|x| Value(x.clone()))
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.collect::<Vec<Value>>()
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};
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Self {
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id: rule.id.as_ref().map(|x| Value(x.clone())),
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max_age_seconds: rule.max_age_seconds.map(|x| IntValue(x as i64)),
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allowed_origins: convert_vec(&rule.allow_origins),
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allowed_methods: convert_vec(&rule.allow_methods),
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allowed_headers: convert_vec(&rule.allow_headers),
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expose_headers: convert_vec(&rule.expose_headers),
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use quick_xml::de::from_str;
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#[test]
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fn test_deserialize() -> Result<(), Error> {
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let message = r#"<?xml version="1.0" encoding="UTF-8"?>
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<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
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<CORSRule>
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<AllowedOrigin>http://www.example.com</AllowedOrigin>
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<AllowedMethod>PUT</AllowedMethod>
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<AllowedMethod>POST</AllowedMethod>
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<AllowedMethod>DELETE</AllowedMethod>
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<AllowedHeader>*</AllowedHeader>
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</CORSRule>
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<CORSRule>
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<AllowedOrigin>*</AllowedOrigin>
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<AllowedMethod>GET</AllowedMethod>
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</CORSRule>
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<CORSRule>
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<ID>qsdfjklm</ID>
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<MaxAgeSeconds>12345</MaxAgeSeconds>
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<AllowedOrigin>https://perdu.com</AllowedOrigin>
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<AllowedMethod>GET</AllowedMethod>
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<AllowedMethod>DELETE</AllowedMethod>
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<AllowedHeader>*</AllowedHeader>
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|
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<ExposeHeader>*</ExposeHeader>
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</CORSRule>
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</CORSConfiguration>"#;
|
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|
|
let conf: CorsConfiguration = from_str(message).unwrap();
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|
|
|
let ref_value = CorsConfiguration {
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|
|
|
|
xmlns: (),
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|
|
|
|
cors_rules: vec![
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|
|
|
|
CorsRule {
|
|
|
|
|
id: None,
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|
|
|
max_age_seconds: None,
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|
|
|
|
allowed_origins: vec!["http://www.example.com".into()],
|
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|
|
|
allowed_methods: vec!["PUT".into(), "POST".into(), "DELETE".into()],
|
|
|
|
|
allowed_headers: vec!["*".into()],
|
|
|
|
|
expose_headers: vec![],
|
|
|
|
|
},
|
|
|
|
|
CorsRule {
|
|
|
|
|
id: None,
|
|
|
|
|
max_age_seconds: None,
|
|
|
|
|
allowed_origins: vec!["*".into()],
|
|
|
|
|
allowed_methods: vec!["GET".into()],
|
|
|
|
|
allowed_headers: vec![],
|
|
|
|
|
expose_headers: vec![],
|
|
|
|
|
},
|
|
|
|
|
CorsRule {
|
|
|
|
|
id: Some("qsdfjklm".into()),
|
|
|
|
|
max_age_seconds: Some(IntValue(12345)),
|
|
|
|
|
allowed_origins: vec!["https://perdu.com".into()],
|
|
|
|
|
allowed_methods: vec!["GET".into(), "DELETE".into()],
|
|
|
|
|
allowed_headers: vec!["*".into()],
|
|
|
|
|
expose_headers: vec!["*".into()],
|
|
|
|
|
},
|
|
|
|
|
],
|
|
|
|
|
};
|
|
|
|
|
assert_eq! {
|
|
|
|
|
ref_value,
|
|
|
|
|
conf
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
let message2 = to_xml_with_header(&ref_value)?;
|
|
|
|
|
|
|
|
|
|
let cleanup = |c: &str| c.replace(char::is_whitespace, "");
|
|
|
|
|
assert_eq!(cleanup(message), cleanup(&message2));
|
|
|
|
|
|
|
|
|
|
Ok(())
|
|
|
|
|
}
|
|
|
|
|
}
|
