misc improvements (#24)

- improve error handling in host functions
- refactor examples
- fix IT generation

.gitignore

@@ -12,10 +12,7 @@ target/
 # REPL history files
 *.repl_history
 
-# Temporary file of ipfs node example
-/examples/ipfs_node/wasm/artifacts/ipfs_rpc_file
-
 # Allowed Wasm files for examples
 !/examples/greeting/artifacts/*.wasm
-!/examples/ipfs_node/artifacts/wasm_modules/*.wasm
-!/examples/records/artifacts/wasm_modules/*.wasm
+!/examples/ipfs_node/artifacts/*.wasm
+!/examples/records/artifacts/*.wasm

Cargo.lock

@@ -598,7 +598,7 @@ dependencies = [
 
 [[package]]
 name = "fce-wit-generator"
-version = "0.1.2"
+version = "0.1.3"
 dependencies = [
  "fce-wit-parser",
  "fluence-sdk-wit 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -630,7 +630,7 @@ dependencies = [
 
 [[package]]
 name = "fcli"
-version = "0.1.3"
+version = "0.1.4"
 dependencies = [
  "anyhow",
  "clap",
@@ -652,7 +652,7 @@ dependencies = [
 
 [[package]]
 name = "fluence-app-service"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "fluence-faas",
  "log",
@@ -663,7 +663,7 @@ dependencies = [
 
 [[package]]
 name = "fluence-faas"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "cmd_lib",
  "fce",
@@ -768,7 +768,7 @@ checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 
 [[package]]
 name = "frepl"
-version = "0.1.3"
+version = "0.1.4"
 dependencies = [
  "anyhow",
  "clap",

crates/wit-generator/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "fce-wit-generator"
 description = "Fluence FCE interface type helper crate"
-version = "0.1.2"
+version = "0.1.3"
 authors = ["Fluence Labs"]
 license = "Apache-2.0"
 edition = "2018"

crates/wit-generator/src/instructions_generator/foreign_mod_instructions.rs

@@ -195,7 +195,7 @@ impl ForeignModInstructionGenerator for ParsedType {
             ParsedType::ByteVector => vec![
                 Instruction::ArgumentGet { index },
                 Instruction::ArgumentGet { index: index + 1 },
-                Instruction::StringLiftMemory,
+                Instruction::ByteArrayLiftMemory,
             ],
             ParsedType::Record(record_name) => {
                 let type_index = wit_resolver.get_record_type_id(record_name)?;

examples/records/Config.toml

@@ -1,4 +1,4 @@
-modules_dir = "artifacts/wasm_modules"
+modules_dir = "artifacts/"
 
 [[module]]
     name = "effector"

fluence-app-service/Cargo.toml

@@ -1,13 +1,13 @@
 [package]
 name = "fluence-app-service"
 description = "Fluence Application Service"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["Fluence Labs"]
 license = "Apache-2.0"
 edition = "2018"
 
 [dependencies]
-fluence-faas = { path = "../fluence-faas", version = "0.1.1" }
+fluence-faas = { path = "../fluence-faas", version = "0.1.2" }
 
 log = "0.4.8"
 serde_json = "1.0.53"

fluence-faas/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "fluence-faas"
 description = "Fluence FaaS"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["Fluence Labs"]
 license = "Apache-2.0"
 edition = "2018"

fluence-faas/src/misc/imports.rs

@@ -49,6 +49,7 @@ fn write_to_mem(context: &mut Ctx, address: usize, value: &[u8]) {
         .for_each(|(cell, byte)| cell.set(*byte));
 }
 
+#[rustfmt::skip]
 pub(super) fn create_host_import_func<S>(host_cmd: S) -> DynamicFunc<'static>
 where
     S: Into<String>,
@@ -56,10 +57,8 @@ where
     use wasmer_core::Func;
 
     let allocate_func: Box<RefCell<Option<Func<'static, i32, i32>>>> = Box::new(RefCell::new(None));
-    let set_result_ptr_func: Box<RefCell<Option<Func<'static, i32, ()>>>> =
-        Box::new(RefCell::new(None));
-    let set_result_size_func: Box<RefCell<Option<Func<'static, i32, ()>>>> =
-        Box::new(RefCell::new(None));
+    let set_result_ptr_func: Box<RefCell<Option<Func<'static, i32, ()>>>> = Box::new(RefCell::new(None));
+    let set_result_size_func: Box<RefCell<Option<Func<'static, i32, ()>>>> = Box::new(RefCell::new(None));
 
     let host_cmd = host_cmd.into();
 
@@ -73,8 +72,18 @@ where
 
         let wasm_ptr = WasmPtr::<u8, Array>::new(array_ptr as _);
         let result = match wasm_ptr.get_utf8_string(ctx.memory(0), array_size as _) {
-            Some(arg_value) => cmd_lib::run_fun!("{} {}", host_cmd, arg_value).unwrap(),
-            None => return vec![],
+            // TODO: prevent command injection
+            Some(arg_value) => match cmd_lib::run_fun!("{} {}", host_cmd, arg_value) {
+                Ok(result) => result,
+                Err(e) => {
+                    log::error!("error occurred while calling `{} {}`: {:?} ", host_cmd, arg_value, e);
+                    String::new()
+                },
+            }
+            None => {
+                log::error!("error getting utf8 string from {} offset of {} bytes", array_ptr, array_size);
+                String::new()
+            }
         };
 
         unsafe {

tools/cli/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "fcli"
 description = "Fluence FCE command line tool"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Fluence Labs"]
 repository = "https://github.com/fluencelabs/fce/tools/cli"
 license = "Apache-2.0"
@@ -12,7 +12,7 @@ name = "fce"
 path = "src/main.rs"
 
 [dependencies]
-fce-wit-generator = { path = "../../crates/wit-generator", version = "0.1.2"}
+fce-wit-generator = { path = "../../crates/wit-generator", version = "0.1.3"}
 fce-wit-parser = { path = "../../crates/wit-parser", version = "0.1.3" }
 
 anyhow = "1.0.31"

tools/repl/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "frepl"
 description = "Fluence FCE REPL intended for testing purposes"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Fluence Labs"]
 repository = "https://github.com/fluencelabs/fce/tools/repl"
 license = "Apache-2.0"
@@ -12,7 +12,7 @@ name = "fce-repl"
 path = "src/main.rs"
 
 [dependencies]
-fluence-app-service = { path = "../../fluence-app-service", version = "0.1.1", features = ["raw-module-api"] }
+fluence-app-service = { path = "../../fluence-app-service", version = "0.1.2", features = ["raw-module-api"] }
 
 anyhow = "1.0.31"
 clap = "2.33.1"