update examples

examples/ipfs-node/effector/src/main.rs

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+mod path;
+
+use crate::path::to_full_path;
+
+use fluence::fce;
+use fluence::WasmLogger;
+
+const RESULT_FILE_PATH: &str = "/tmp/ipfs_rpc_file";
+const IPFS_ADDR_ENV_NAME: &str = "IPFS_ADDR";
+const TIMEOUT_ENV_NAME: &str = "timeout";
+
+pub fn main() {
+    WasmLogger::init_with_level(log::Level::Info).unwrap();
+}
+
+/// Put file from specified path to IPFS and return its hash.
+#[fce]
+pub fn put(file_path: String) -> String {
+    log::info!("put called with file path {}", file_path);
+
+    let file_path = to_full_path(file_path);
+
+    let timeout = std::env::var(TIMEOUT_ENV_NAME).unwrap_or_else(|_| "1s".to_string());
+    let cmd = format!("add --timeout {} -Q {}", timeout, file_path);
+
+    ipfs(cmd)
+}
+
+/// Get file by provided hash from IPFS, saves it to a temporary file and returns a path to it.
+#[fce]
+pub fn get(hash: String) -> String {
+    log::info!("get called with hash {}", hash);
+
+    let result_file_path = to_full_path(RESULT_FILE_PATH);
+
+    let timeout = std::env::var(TIMEOUT_ENV_NAME).unwrap_or_else(|_| "1s".to_string());
+    let cmd = format!(
+        "get --timeout {} -o {}  {}",
+        timeout, result_file_path, hash
+    );
+
+    ipfs(cmd);
+
+    RESULT_FILE_PATH.to_string()
+}
+
+#[fce]
+pub fn get_address() -> String {
+    match std::env::var(IPFS_ADDR_ENV_NAME) {
+        Ok(addr) => addr,
+        Err(e) => format!(
+            "getting {} env variable failed with error {:?}",
+            IPFS_ADDR_ENV_NAME, e
+        ),
+    }
+}
+
+#[fce]
+#[link(wasm_import_module = "host")]
+extern "C" {
+    /// Execute provided cmd as a parameters of ipfs cli, return result.
+    pub fn ipfs(cmd: String) -> String;
+}