Merging upstream version 1.44.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/fluent-bit/examples/wasi_serde_json/src/main.rs b/fluent-bit/examples/wasi_serde_json/src/main.rs
new file mode 100644
index 000000000..29ee25f4f
--- /dev/null
+++ b/fluent-bit/examples/wasi_serde_json/src/main.rs
@@ -0,0 +1,32 @@
+// Import rust's io and filesystem module
+use std::io::prelude::*;
+use std::fs;
+// Import pure and fast JSON library written in Rust
+use serde_json::json;
+// Import chrono library to handle time related operation conveniently
+use chrono::Utc;
+
+// Entry point to our WASI applications
+fn main() {
+  // Note that fractional second must be handled by `.%9f` not `%L` like as fluent-bit.
+  let time = Utc::now().format("%Y-%m-%dT%H:%M:%S.%9f %z").to_string();
+  // The type of `john` is `serde_json::Value`
+  let john = json!({
+      "name": "John Doe",
+      "age": 43,
+      "phones": [
+          "+44 1234567",
+          "+44 2345678"
+      ],
+      "time": format!("{}", time),
+  });
+  // Print out serialized JSON data for john
+  // This will handle writing to stdout for us using the WASI APIs (e.g fd_write)
+  println!("{}", john.to_string());
+
+  // Create a file (Testing for exposed wasi API)
+  let mut file = fs::File::create("helloworld.txt").expect("Unable to create file");
+
+  // Write the text to the file we created (Testing for exposed wasi API)
+  write!(file, "Hello world!\n").unwrap();
+}
\ No newline at end of file