commit c6cdb67ec2a80f0a21b707ea3abd2e319a8fa324
Author: vms <michail.vms@gmail.com>
Date:   Fri Feb 4 23:21:25 2022 +0300

    add greeting and url-downloader services

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..565208c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+target/
+**/*.rs.bk
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+
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diff --git a/hello_world/Cargo.lock b/hello_world/Cargo.lock
new file mode 100644
index 0000000..b1aca41
--- /dev/null
+++ b/hello_world/Cargo.lock
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+ "once_cell",
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+ "syn",
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+ "id-arena",
+ "leb128",
+ "log",
+ "walrus-macro",
+ "wasmparser 0.59.0",
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+ "proc-macro2",
+ "quote",
+ "syn",
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+
+[[package]]
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+version = "0.1.0"
+dependencies = [
+ "marine-rs-sdk",
+ "marine-rs-sdk-test",
+]
+
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+ "cranelift-codegen",
+ "cranelift-entity",
+ "cranelift-native",
+ "libc",
+ "nix",
+ "rayon",
+ "serde",
+ "serde-bench",
+ "serde_bytes",
+ "serde_derive",
+ "target-lexicon",
+ "wasmer-clif-fork-frontend",
+ "wasmer-clif-fork-wasm",
+ "wasmer-runtime-core-fl",
+ "wasmer-win-exception-handler",
+ "wasmparser 0.51.4",
+ "winapi",
+]
+
+[[package]]
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+version = "0.59.0"
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+ "cranelift-codegen",
+ "log",
+ "smallvec",
+ "target-lexicon",
+]
+
+[[package]]
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+version = "0.59.0"
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+ "cranelift-codegen",
+ "cranelift-entity",
+ "log",
+ "thiserror",
+ "wasmer-clif-fork-frontend",
+ "wasmparser 0.51.4",
+]
+
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+ "it-lilo",
+ "it-to-bytes",
+ "itertools 0.10.3",
+ "log",
+ "nom",
+ "safe-transmute",
+ "semver 0.11.0",
+ "serde",
+ "serde_json",
+ "thiserror",
+ "wast",
+]
+
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+ "blake3",
+ "cc",
+ "digest 0.8.1",
+ "errno",
+ "hex",
+ "indexmap",
+ "lazy_static",
+ "libc",
+ "nix",
+ "page_size",
+ "parking_lot",
+ "rustc_version",
+ "serde",
+ "serde-bench",
+ "serde_bytes",
+ "serde_derive",
+ "smallvec",
+ "target-lexicon",
+ "wasmparser 0.51.4",
+ "winapi",
+]
+
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+ "lazy_static",
+ "libc",
+ "nix",
+ "page_size",
+ "parking_lot",
+ "rustc_version",
+ "serde",
+ "serde-bench",
+ "serde_bytes",
+ "serde_derive",
+ "smallvec",
+ "target-lexicon",
+ "wasmparser 0.51.4",
+ "winapi",
+]
+
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+ "lazy_static",
+ "memmap",
+ "serde",
+ "serde_derive",
+ "wasmer-clif-backend-fl",
+ "wasmer-runtime-core-fl",
+]
+
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+version = "0.17.1"
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+checksum = "3e0f331ec6fb16590946f61b2418cd5295c4f3aa772c77eb054bea250a8fdb71"
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+ "bincode",
+ "byteorder",
+ "generational-arena",
+ "getrandom 0.1.16",
+ "libc",
+ "log",
+ "serde",
+ "thiserror",
+ "time",
+ "typetag",
+ "wasmer-runtime-core-fl",
+ "winapi",
+]
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+ "libc",
+ "wasmer-runtime-core",
+ "winapi",
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+dependencies = [
+ "leb128",
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+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/hello_world/Cargo.toml b/hello_world/Cargo.toml
new file mode 100644
index 0000000..2a47fee
--- /dev/null
+++ b/hello_world/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "wasm-greeting"
+version = "0.1.0"
+authors = ["Fluence Labs"]
+description = "The greeting module for the Fluence network"
+repository = "https://github.com/fluencelabs/marine/tree/master/examples/greeting"
+edition = "2018"
+publish = false
+
+[[bin]]
+name = "greeting"
+path = "src/main.rs"
+
+[dependencies]
+marine-rs-sdk = "0.6.13"
+
+[dev-dependencies]
+marine-rs-sdk-test = "0.4.1"
diff --git a/hello_world/Config.toml b/hello_world/Config.toml
new file mode 100644
index 0000000..5a5ad06
--- /dev/null
+++ b/hello_world/Config.toml
@@ -0,0 +1,6 @@
+modules_dir = "artifacts/"
+
+[[module]]
+    name = "greeting"
+    max_heap_size = "10 KiB"
+    logger_enabled = false
diff --git a/hello_world/artifacts/greeting.wasm b/hello_world/artifacts/greeting.wasm
new file mode 100755
index 0000000..e5703c5
Binary files /dev/null and b/hello_world/artifacts/greeting.wasm differ
diff --git a/hello_world/build.sh b/hello_world/build.sh
new file mode 100755
index 0000000..81b8c0e
--- /dev/null
+++ b/hello_world/build.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+cargo update --aggressive
+marine build --release
+
+rm artifacts/* || true
+mkdir -p artifacts
+
+cp ./target/wasm32-wasi/release/greeting.wasm artifacts/
diff --git a/hello_world/src/main.rs b/hello_world/src/main.rs
new file mode 100644
index 0000000..3c541d4
--- /dev/null
+++ b/hello_world/src/main.rs
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+
+use marine_rs_sdk::marine;
+use marine_rs_sdk::module_manifest;
+
+module_manifest!();
+
+pub fn main() {}
+
+#[marine]
+pub fn greeting(name: String) -> String {
+    format!("Hi, {}", name)
+}
+
+#[cfg(test)]
+mod tests {
+    use marine_rs_sdk_test::marine_test;
+
+    #[marine_test(config_path = "../Config.toml", modules_dir = "../artifacts")]
+    fn empty_string(greeting: marine_test_env::greeting::ModuleInterface) {
+        let actual = greeting.greeting(String::new());
+        assert_eq!(actual, "Hi, ");
+    }
+
+    #[marine_test(config_path = "../Config.toml", modules_dir = "../artifacts")]
+    fn non_empty_string(greeting: marine_test_env::greeting::ModuleInterface) {
+        let actual = greeting.greeting("name".to_string());
+        assert_eq!(actual, "Hi, name");
+    }
+}
diff --git a/url-downloader/Config.toml b/url-downloader/Config.toml
new file mode 100644
index 0000000..d22508b
--- /dev/null
+++ b/url-downloader/Config.toml
@@ -0,0 +1,21 @@
+modules_dir = "artifacts/"
+
+[[module]]
+    name = "local_storage"
+    logger_enabled = true
+
+    [module.wasi]
+    preopened_files = ["./sites"]
+    # this is where files will be stored
+    mapped_dirs = { "sites" = "./sites" }
+
+[[module]]
+    name = "curl_adapter"
+    logger_enabled = true
+
+    [module.mounted_binaries]
+    curl = "/usr/bin/curl"
+
+[[module]]
+    name = "facade"
+    logger_enabled = true
diff --git a/url-downloader/artifacts/curl_adapter.wasm b/url-downloader/artifacts/curl_adapter.wasm
new file mode 100755
index 0000000..eecdd4d
Binary files /dev/null and b/url-downloader/artifacts/curl_adapter.wasm differ
diff --git a/url-downloader/artifacts/facade.wasm b/url-downloader/artifacts/facade.wasm
new file mode 100755
index 0000000..f687711
Binary files /dev/null and b/url-downloader/artifacts/facade.wasm differ
diff --git a/url-downloader/artifacts/local_storage.wasm b/url-downloader/artifacts/local_storage.wasm
new file mode 100755
index 0000000..62ea677
Binary files /dev/null and b/url-downloader/artifacts/local_storage.wasm differ
diff --git a/url-downloader/build.sh b/url-downloader/build.sh
new file mode 100755
index 0000000..a81a671
--- /dev/null
+++ b/url-downloader/build.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+(
+  cd local_storage || exit;
+  cargo update --aggressive;
+  marine build --release;
+)
+
+(
+  cd curl_adapter || exit;
+  cargo update --aggressive;
+  marine build --release;
+)
+
+(
+  cd facade || exit;
+  cargo update --aggressive;
+  marine build --release;
+)
+
+rm -f artifacts/* || true
+mkdir -p artifacts
+
+cp ./local_storage/target/wasm32-wasi/release/local_storage.wasm artifacts/
+cp ./curl_adapter/target/wasm32-wasi/release/curl_adapter.wasm artifacts/
+cp ./facade/target/wasm32-wasi/release/facade.wasm artifacts/
diff --git a/url-downloader/curl_adapter/Cargo.lock b/url-downloader/curl_adapter/Cargo.lock
new file mode 100644
index 0000000..8d21de8
--- /dev/null
+++ b/url-downloader/curl_adapter/Cargo.lock
@@ -0,0 +1,275 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
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new file mode 100644
index 0000000..88a30e3
--- /dev/null
+++ b/url-downloader/curl_adapter/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "curl_adapter"
+version = "0.1.0"
+authors = ["Fluence Labs"]
+edition = "2018"
+publish = false
+
+[[bin]]
+path = "src/main.rs"
+name = "curl_adapter"
+
+[dependencies]
+marine-rs-sdk ={ version = "0.6.13", features = ["logger"] }
+log = "0.4.8"
diff --git a/url-downloader/curl_adapter/src/main.rs b/url-downloader/curl_adapter/src/main.rs
new file mode 100644
index 0000000..8326690
--- /dev/null
+++ b/url-downloader/curl_adapter/src/main.rs
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ */
+
+#![allow(improper_ctypes)]
+
+use marine_rs_sdk::marine;
+use marine_rs_sdk::module_manifest;
+
+use marine_rs_sdk::WasmLoggerBuilder;
+use marine_rs_sdk::MountedBinaryResult;
+
+module_manifest!();
+
+/// Log level can be changed by `RUST_LOG` env as well.
+pub fn main() {
+    WasmLoggerBuilder::new().build().unwrap();
+}
+
+#[marine]
+pub fn download(url: String) -> String {
+    log::info!("download called with url {}\n", url);
+
+    let result = curl(vec![url]);
+
+    String::from_utf8(result.stdout).unwrap()
+}
+
+/// Permissions in `Config.toml` should exist to use host functions.
+#[marine]
+#[link(wasm_import_module = "host")]
+extern "C" {
+    fn curl(cmd: Vec<String>) -> MountedBinaryResult;
+}
diff --git a/url-downloader/facade/Cargo.lock b/url-downloader/facade/Cargo.lock
new file mode 100644
index 0000000..0b9cafd
--- /dev/null
+++ b/url-downloader/facade/Cargo.lock
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/url-downloader/facade/Cargo.toml b/url-downloader/facade/Cargo.toml
new file mode 100644
index 0000000..62e3a4e
--- /dev/null
+++ b/url-downloader/facade/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "facade"
+version = "0.1.0"
+authors = ["Fluence Labs"]
+edition = "2018"
+publish = false
+
+[[bin]]
+name = "facade"
+path = "src/main.rs"
+
+[dependencies]
+marine-rs-sdk ={ version = "0.6.13", features = ["logger"] }
+anyhow = "1.0.31"
+log = "0.4.8"
diff --git a/url-downloader/facade/src/main.rs b/url-downloader/facade/src/main.rs
new file mode 100644
index 0000000..848b3ec
--- /dev/null
+++ b/url-downloader/facade/src/main.rs
@@ -0,0 +1,56 @@
+/*
+ * 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.
+ */
+#![allow(improper_ctypes)]
+
+use marine_rs_sdk::marine;
+use marine_rs_sdk::module_manifest;
+use marine_rs_sdk::WasmLoggerBuilder;
+
+module_manifest!();
+
+pub fn main() {
+    WasmLoggerBuilder::new().build().unwrap();
+}
+
+/// Combining of modules: `curl` and `local_storage`.
+/// Calls `curl` and stores returned result into a file.
+#[marine]
+pub fn get_n_save(url: String, file_name: String) -> String {
+    log::info!("get_n_save called with {} {}\n", url, file_name);
+
+    let result = download(url);
+    file_put(file_name, result.into_bytes());
+
+    String::from("Ok")
+}
+
+/// Importing `curl` module
+#[marine]
+#[link(wasm_import_module = "curl_adapter")]
+extern "C" {
+    pub fn download(url: String) -> String;
+}
+
+/// Importing `local_storage` module
+#[marine]
+#[link(wasm_import_module = "local_storage")]
+extern "C" {
+    #[link_name = "get"]
+    pub fn file_get(file_name: String) -> Vec<u8>;
+
+    #[link_name = "put"]
+    pub fn file_put(name: String, file_content: Vec<u8>) -> String;
+}
diff --git a/url-downloader/local_storage/Cargo.lock b/url-downloader/local_storage/Cargo.lock
new file mode 100644
index 0000000..f60dce6
--- /dev/null
+++ b/url-downloader/local_storage/Cargo.lock
@@ -0,0 +1,351 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "bumpalo"
+version = "3.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4a45a46ab1f2412e53d3a0ade76ffad2025804294569aae387231a0cd6e0899"
+
+[[package]]
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+
+[[package]]
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+checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
+dependencies = [
+ "libc",
+ "num-integer",
+ "num-traits",
+ "time",
+ "winapi",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "418d37c8b1d42553c93648be529cb70f920d3baf8ef469b74b9638df426e0b4c"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
+
+[[package]]
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+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
+version = "0.2.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e74d72e0f9b65b5b4ca49a346af3976df0f9c61d550727f349ecd559f251a26c"
+
+[[package]]
+name = "local_storage"
+version = "0.1.0"
+dependencies = [
+ "log",
+ "marine-rs-sdk",
+ "wasm-tracing-allocator",
+]
+
+[[package]]
+name = "log"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "marine-macro"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfc907943772cf966ebe2a2d462d09bc79e898ef102ed065ba3d3abcc93fbb71"
+dependencies = [
+ "marine-macro-impl",
+ "marine-rs-sdk-main",
+]
+
+[[package]]
+name = "marine-macro-impl"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfdbed3a10ae9b22df06bee8cd0023255358935aae8e8daf9d1a006cfaeeb11e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "serde",
+ "serde_json",
+ "syn",
+ "uuid",
+]
+
+[[package]]
+name = "marine-rs-sdk"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d17d44016675abdf18caf3ac1bdd4437cc17ec0db019da141bb06a9ea991726"
+dependencies = [
+ "marine-macro",
+ "marine-rs-sdk-main",
+ "marine-timestamp-macro",
+ "polyplets",
+ "serde",
+]
+
+[[package]]
+name = "marine-rs-sdk-main"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ff262801664ce22f9d274504d6e8088c217034aba0ca431eca8d0258f3699c6"
+dependencies = [
+ "log",
+ "serde",
+]
+
+[[package]]
+name = "marine-timestamp-macro"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85a9f5b1adeff98ac5a14cfc5fa814185a807ba4a0d3849c9f9e9fd868b27d1f"
+dependencies = [
+ "chrono",
+ "quote",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "polyplets"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cc56e7803860fa903c27675a17215e1cfb39fb26e111c0b93f6c049f9cf8d8e"
+dependencies = [
+ "marine-macro",
+ "marine-rs-sdk-main",
+ "serde",
+]
+
+[[package]]
+name = "proc-macro2"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
+
+[[package]]
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+checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d23c1ba4cf0efd44be32017709280b32d1cea5c3f1275c3b6d9e8bc54f758085"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
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+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
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+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
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+checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
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+ "libc",
+ "wasi",
+ "winapi",
+]
+
+[[package]]
+name = "unicode-xid"
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+[[package]]
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+checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
+
+[[package]]
+name = "wasm-bindgen"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25f1af7423d8588a3d840681122e72e6a24ddbcb3f0ec385cac0d12d24256c06"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b21c0df030f5a177f3cba22e9bc4322695ec43e7257d865302900290bcdedca"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f4203d69e40a52ee523b2529a773d5ffc1dc0071801c87b3d270b471b80ed01"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d958d035c4438e28c70e4321a2911302f10135ce78a9c7834c0cab4123d06a2"
+
+[[package]]
+name = "wasm-tracing-allocator"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00638b0f463575ce0ad7fe03809c9b86b2a3abbb6c1f2e4d5569572b74ca65ae"
+dependencies = [
+ "wasm-bindgen",
+]
+
+[[package]]
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+version = "0.3.9"
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+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/url-downloader/local_storage/Cargo.toml b/url-downloader/local_storage/Cargo.toml
new file mode 100644
index 0000000..a4f6293
--- /dev/null
+++ b/url-downloader/local_storage/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "local_storage"
+version = "0.1.0"
+authors = ["Fluence Labs"]
+edition = "2018"
+publish = false
+
+[[bin]]
+name = "local_storage"
+path = "src/main.rs"
+
+[dependencies]
+marine-rs-sdk ={ version = "0.6.13", features = ["logger"] }
+wasm-tracing-allocator = "0.1.0"
+
+log = "0.4.8"
diff --git a/url-downloader/local_storage/src/main.rs b/url-downloader/local_storage/src/main.rs
new file mode 100644
index 0000000..34fba98
--- /dev/null
+++ b/url-downloader/local_storage/src/main.rs
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+use marine_rs_sdk::marine;
+use marine_rs_sdk::module_manifest;
+use marine_rs_sdk::WasmLoggerBuilder;
+
+use std::fs;
+use std::path::PathBuf;
+
+module_manifest!();
+
+const SITES_DIR: &str = "/sites/";
+
+/// Log level can be changed by `RUST_LOG` env as well.
+pub fn main() {
+    WasmLoggerBuilder::new().build().unwrap();
+}
+
+/// You can read or write files from the file system if there is permission to use directories described in `Config.toml`.
+#[marine]
+pub fn put(name: String, file_content: Vec<u8>) -> String {
+    log::info!("put called with file name {}\n", name);
+    let rpc_tmp_filepath = format!("{}{}", SITES_DIR, name);
+
+    let result = fs::write(PathBuf::from(rpc_tmp_filepath), file_content);
+    if let Err(e) = result {
+        return format!("file can't be written: {}", e);
+    }
+
+    String::from("Ok")
+}
+
+#[marine]
+pub fn get(file_name: String) -> Vec<u8> {
+    log::info!("get called with file name: {}\n", file_name);
+
+    let tmp_filepath = format!("{}{}", SITES_DIR, file_name);
+
+    fs::read(tmp_filepath).unwrap_or_else(|_| b"error while reading file".to_vec())
+}
diff --git a/url-downloader/sites/asd b/url-downloader/sites/asd
new file mode 100644
index 0000000..6c68f27
--- /dev/null
+++ b/url-downloader/sites/asd
@@ -0,0 +1,6 @@
+<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
+<TITLE>301 Moved</TITLE></HEAD><BODY>
+<H1>301 Moved</H1>
+The document has moved
+<A HREF="http://www.google.com/">here</A>.
+</BODY></HTML>