From e0d72b08cfa3658fa115b53f254243b82016a819 Mon Sep 17 00:00:00 2001
From: landrigun <manach.r@msn.com>
Date: Fri, 9 Sep 2022 14:02:16 +0100
Subject: [PATCH] feat: #1 impl an http body parser

---
 Cargo.lock              |  7 ++++++
 Cargo.toml              |  1 +
 src/handlers/request.rs | 49 ++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 0f7bf71..96a7984 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -274,6 +274,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "json"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "078e285eafdfb6c4b434e0d31e8cfcb5115b651496faca5749b88fafd4f23bfd"
+
 [[package]]
 name = "kv-log-macro"
 version = "1.0.7"
@@ -366,6 +372,7 @@ name = "simple-auth"
 version = "0.1.0"
 dependencies = [
  "async-std",
+ "json",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 8025190..6a3e1a1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+json = "0.12.4"
 
 [dependencies.async-std]
 version = "1.6"
diff --git a/src/handlers/request.rs b/src/handlers/request.rs
index 583508c..1889967 100644
--- a/src/handlers/request.rs
+++ b/src/handlers/request.rs
@@ -1,11 +1,14 @@
 //! request handles properly the incoming request
 //! it will parse the request according to the HTTP message specifications
 //! see: https://developer.mozilla.org/en-US/docs/Web/HTTP/Messages
+//! NOTE: only few parts of the specification has been implemented
+
+use json;
 
 #[derive(Debug)]
 pub enum HTTPVersion {
     Http1,
-    //http2,
+    //Http2,
 }
 
 impl Into<String> for HTTPVersion {
@@ -72,6 +75,31 @@ impl Into<String> for HTTPStartLine {
     }
 }
 
+/// HTTPBody represents http request body
+/// for simplicity, only json body are accepted
+pub struct HTTPBody {
+    data: json::JsonValue,
+}
+
+impl HTTPBody {
+    fn new(data: json::JsonValue) -> HTTPBody {
+        HTTPBody { data }
+    }
+}
+
+impl TryFrom<&str> for HTTPBody {
+    type Error = String;
+    fn try_from(body: &str) -> Result<HTTPBody, Self::Error> {
+        match json::parse(body) {
+            Ok(v) => Ok(HTTPBody::new(v)),
+            Err(e) => Err(format!(
+                "error occurred during request body parsing err={}",
+                e
+            )),
+        }
+    }
+}
+
 /// Request defined the HTTP request
 #[derive(Debug)]
 pub struct HTTPRequest {
@@ -156,3 +184,22 @@ fn test_handle_request() {
         assert_eq!(http_request.is_valid(), is_valid);
     }
 }
+
+#[test]
+fn test_http_body() {
+    let test_cases: [(&str, bool); 3] = [
+        ("hello, how are you ?", false),
+        ("qsdfqsdffqsdffsq", false),
+        (
+            r#"{"access_token":"AAAAAAAAAAAA.BBBBBBBBBB.CCCCCCCCCC","refresh_token": "DDDDDDDDDDD.EEEEEEEEEEE.FFFFF"}"#,
+            true,
+        ),
+    ];
+
+    for (body, is_valid) in test_cases {
+        match HTTPBody::try_from(body) {
+            Ok(_) => assert!(is_valid),
+            Err(_) => assert!(!is_valid),
+        }
+    }
+}