fix: verify email address validity on signup

Cargo.toml

@@ -50,3 +50,5 @@ tokio = {version = "1.13", features = ["macros", "io-util", "net", "time", "rt-m
 
 lettre = { version = "0.10.0-rc.3", features = ["builder", "tokio1", "tokio1-rustls-tls", "smtp-transport"]}
 sailfish = "0.3.3"
+
+regex = "1.6.0"

src/errors.rs

@@ -21,8 +21,8 @@ pub enum ServiceError {
 
     #[display(fmt = "Email is required")] //405j
     EmailMissing,
-    #[display(fmt = "The value you entered for email is not an email")] //405j
-    NotAnEmail,
+    #[display(fmt = "Please enter a valid email address")] //405j
+    EmailInvalid,
 
     #[display(fmt = "The value you entered for URL is not a URL")] //405j
     NotAUrl,
@@ -130,7 +130,7 @@ impl ResponseError for ServiceError {
     fn status_code(&self) -> StatusCode {
         match self {
             ServiceError::ClosedForRegistration => StatusCode::FORBIDDEN,
-            ServiceError::NotAnEmail => StatusCode::BAD_REQUEST,
+            ServiceError::EmailInvalid => StatusCode::BAD_REQUEST,
             ServiceError::NotAUrl => StatusCode::BAD_REQUEST,
             ServiceError::WrongPasswordOrUsername => StatusCode::FORBIDDEN,
             ServiceError::UsernameNotFound => StatusCode::NOT_FOUND,

src/handlers/user.rs

@@ -11,6 +11,7 @@ use crate::config::EmailOnSignup;
 use crate::models::response::OkResponse;
 use crate::models::response::TokenResponse;
 use crate::mailer::VerifyClaims;
+use crate::utils::regex::validate_email_address;
 use crate::utils::time::current_time;
 
 pub fn init_routes(cfg: &mut web::ServiceConfig) {
@@ -63,6 +64,13 @@ pub async fn register(req: HttpRequest, mut payload: web::Json<Register>, app_da
         _ => {}
     }
 
+    if let Some(email) = &payload.email {
+        // check if email address is valid
+        if !validate_email_address(email) {
+            return Err(ServiceError::EmailInvalid)
+        }
+    }
+
     if payload.password != payload.confirm_password {
         return Err(ServiceError::PasswordsDontMatch)
     }

src/utils/mod.rs

@@ -1,3 +1,4 @@
 pub mod parse_torrent;
 pub mod time;
 pub mod hex;
+pub mod regex;

src/utils/regex.rs

@@ -0,0 +1,31 @@
+use regex::Regex;
+
+pub fn validate_email_address(email_address_to_be_checked: &str) -> bool {
+    let email_regex = Regex::new(r"^([a-z\d_+]([a-z\d_+.]*[a-z\d_+])?)@([a-z\d]+([\-.][a-z\d]+)*\.[a-z]{2,6})").unwrap();
+
+    email_regex.is_match(email_address_to_be_checked)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::utils::regex::validate_email_address;
+
+    #[test]
+    fn validate_email_address_test() {
+        assert!(!validate_email_address("test"));
+
+        assert!(!validate_email_address("test@"));
+
+        assert!(!validate_email_address("test@torrust"));
+
+        assert!(!validate_email_address("test@torrust."));
+
+        assert!(!validate_email_address("test@."));
+
+        assert!(!validate_email_address("[email protected]"));
+
+        assert!(validate_email_address("[email protected]"));
+
+        assert!(validate_email_address("[email protected]"))
+    }
+}