1 files changed, 75 insertions, 0 deletions
diff --git a/components/shared/net/blob_url_store.rs b/components/shared/net/blob_url_store.rs
new file mode 100644
index 00000000000..ab853b702c9
--- /dev/null
+++ b/components/shared/net/blob_url_store.rs
@@ -0,0 +1,75 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+use std::str::FromStr;
+
+use serde::{Deserialize, Serialize};
+use servo_url::ServoUrl;
+use url::Url;
+use uuid::Uuid;
+
+use crate::filemanager_thread::FileOrigin;
+
+/// Errors returned to Blob URL Store request
+#[derive(Clone, Debug, Deserialize, PartialEq, Serialize)]
+pub enum BlobURLStoreError {
+    /// Invalid File UUID
+    InvalidFileID,
+    /// Invalid URL origin
+    InvalidOrigin,
+    /// Invalid entry content
+    InvalidEntry,
+    /// Invalid range
+    InvalidRange,
+    /// External error, from like file system, I/O etc.
+    External(String),
+}
+
+/// Standalone blob buffer object
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct BlobBuf {
+    pub filename: Option<String>,
+    /// MIME type string
+    pub type_string: String,
+    /// Size of content in bytes
+    pub size: u64,
+    /// Content of blob
+    pub bytes: Vec<u8>,
+}
+
+/// Parse URL as Blob URL scheme's definition
+///
+/// <https://w3c.github.io/FileAPI/#DefinitionOfScheme>
+pub fn parse_blob_url(url: &ServoUrl) -> Result<(Uuid, FileOrigin), ()> {
+    let url_inner = Url::parse(url.path()).map_err(|_| ())?;
+    let segs = url_inner
+        .path_segments()
+        .map(|c| c.collect::<Vec<_>>())
+        .ok_or(())?;
+
+    if url.query().is_some() || segs.len() > 1 {
+        return Err(());
+    }
+
+    let id = {
+        let id = segs.first().ok_or(())?;
+        Uuid::from_str(id).map_err(|_| ())?
+    };
+    Ok((id, get_blob_origin(&ServoUrl::from_url(url_inner))))
+}
+
+/// Given an URL, returning the Origin that a Blob created under this
+/// URL should have.
+///
+/// HACK(izgzhen): Not well-specified on spec, and it is a bit a hack
+/// both due to ambiguity of spec and that we have to serialization the
+/// Origin here.
+pub fn get_blob_origin(url: &ServoUrl) -> FileOrigin {
+    if url.scheme() == "file" {
+        // NOTE: by default this is "null" (Opaque), which is not ideal
+        "file://".to_string()
+    } else {
+        url.origin().ascii_serialization()
+    }
+}