(opendal-reqsign) 01/01: feat(context-file-read-tokio): Allow file read token been built on wasm

[xu...@apache.org]

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xuanwo pushed a commit to branch file-tokio-support-wasm
in repository https://gitbox.apache.org/repos/asf/opendal-reqsign.git

commit 2bdbbfc4cdc0c43831b7b2ba0db59a69f5a62635
Author: Xuanwo <gi...@xuanwo.io>
AuthorDate: Mon Oct 13 14:43:33 2025 +0800

    feat(context-file-read-tokio): Allow file read token been built on wasm
    
    Signed-off-by: Xuanwo <gi...@xuanwo.io>
---
 context/file-read-tokio/Cargo.toml |  2 ++
 context/file-read-tokio/src/lib.rs | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/context/file-read-tokio/Cargo.toml b/context/file-read-tokio/Cargo.toml
index b8599c4..8248096 100644
--- a/context/file-read-tokio/Cargo.toml
+++ b/context/file-read-tokio/Cargo.toml
@@ -32,6 +32,8 @@ rust-version.workspace = true
 anyhow = { workspace = true }
 async-trait = { workspace = true }
 reqsign-core = { workspace = true }
+
+[target.'cfg(not(target_family = "wasm"))'.dependencies]
 tokio = { version = "1", features = ["fs"] }
 
 [dev-dependencies]
diff --git a/context/file-read-tokio/src/lib.rs b/context/file-read-tokio/src/lib.rs
index 05a155d..565c1c1 100644
--- a/context/file-read-tokio/src/lib.rs
+++ b/context/file-read-tokio/src/lib.rs
@@ -74,6 +74,7 @@ use reqsign_core::{Error, FileRead, Result};
 #[derive(Debug, Clone, Copy, Default)]
 pub struct TokioFileRead;
 
+#[cfg(not(target_family = "wasm"))]
 #[async_trait]
 impl FileRead for TokioFileRead {
     async fn file_read(&self, path: &str) -> Result<Vec<u8>> {
@@ -82,3 +83,13 @@ impl FileRead for TokioFileRead {
             .map_err(|e| Error::unexpected("failed to read file").with_source(e))
     }
 }
+
+#[cfg(target_family = "wasm")]
+#[async_trait]
+impl FileRead for TokioFileRead {
+    async fn file_read(&self, _path: &str) -> Result<Vec<u8>> {
+        Err(Error::unexpected(
+            "TokioFileRead is unsupported on wasm targets",
+        ))
+    }
+}