Add blob loader

components/net/blob_loader.rs

@@ -0,0 +1,87 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use filemanager_thread::BlobURLStore;
+use hyper::header::{DispositionType, ContentDisposition, DispositionParam};
+use hyper::header::{Headers, ContentType, ContentLength, Charset};
+use hyper::http::RawStatus;
+use mime::{Mime, Attr};
+use mime_classifier::MIMEClassifier;
+use net_traits::ProgressMsg::Done;
+use net_traits::blob_url_store::{parse_blob_url, BlobURLStoreEntry, BlobURLStoreError};
+use net_traits::response::HttpsState;
+use net_traits::{LoadConsumer, LoadData, Metadata, NetworkError};
+use resource_thread::{send_error, start_sending_sniffed_opt};
+use std::str;
+use std::sync::{Arc, RwLock};
+
+
+// TODO: Check on GET
+// https://w3c.github.io/FileAPI/#requestResponseModel
+
+pub fn load(load_data: LoadData, consumer: LoadConsumer,
+            blob_url_store: Arc<RwLock<BlobURLStore>>,
+            classifier: Arc<MIMEClassifier>) { // XXX: Move it into net process later
+
+    match parse_blob_url(&load_data.url) {
+        None => {
+            let format_err = NetworkError::Internal(format!("Invalid blob URL format {:?}", load_data.url));
+            send_error(load_data.url.clone(), format_err, consumer);
+        }
+        Some((uuid, _fragment)) => {
+            match blob_url_store.read().unwrap().request(uuid, &load_data.url.origin()) {
+                Ok(entry) => load_blob(&load_data, consumer, classifier, entry),
+                Err(e) => {
+                    let err = match e {
+                        BlobURLStoreError::InvalidKey =>
+                            format!("Invalid blob URL key {:?}", uuid.simple().to_string()),
+                        BlobURLStoreError::InvalidOrigin =>
+                            format!("Invalid blob URL origin {:?}", load_data.url.origin()),
+                    };
+                    send_error(load_data.url.clone(), NetworkError::Internal(err), consumer);
+                }
+            }
+        }
+    }
+}
+
+fn load_blob(load_data: &LoadData,
+             start_chan: LoadConsumer,
+             classifier: Arc<MIMEClassifier>,
+             entry: &BlobURLStoreEntry) {
+    let content_type: Mime = entry.type_string.parse().unwrap_or(mime!(Text / Plain));
+    let charset = content_type.get_param(Attr::Charset);
+
+    let mut headers = Headers::new();
+
+    if let Some(ref name) = entry.filename {
+        let charset = charset.and_then(|c| c.as_str().parse().ok());
+        headers.set(ContentDisposition {
+            disposition: DispositionType::Inline,
+            parameters: vec![
+                DispositionParam::Filename(charset.unwrap_or(Charset::Us_Ascii),
+                                           None, name.as_bytes().to_vec())
+            ]
+        });
+    }
+
+    headers.set(ContentType(content_type.clone()));
+    headers.set(ContentLength(entry.size));
+
+    let metadata = Metadata {
+        final_url: load_data.url.clone(),
+        content_type: Some(ContentType(content_type.clone())),
+        charset: charset.map(|c| c.as_str().to_string()),
+        headers: Some(headers),
+        // https://w3c.github.io/FileAPI/#TwoHundredOK
+        status: Some(RawStatus(200, "OK".into())),
+        https_state: HttpsState::None,
+    };
+
+    if let Ok(chan) =
+        start_sending_sniffed_opt(start_chan, metadata, classifier,
+                                  &entry.bytes, load_data.context.clone()) {
+        let _ = chan.send(Done(Ok(())));
+    }
+}