Refactor send_request in client.rs (#13701)

Closes #13687
Closes #13686

# Description
Light refactoring of `send_request `in `client.rs`. In the end there are
more lines but now the logic is more concise and facilitates adding new
conditions in the future. Unit tests ran fine and I tested a few cases
manually.
Cool project btw, I'll be using nushell from now on.

crates/nu-command/src/network/http/client.rs

@@ -18,6 +18,8 @@ use std::{
 use ureq::{Error, ErrorKind, Request, Response};
 use url::Url;
 
+const HTTP_DOCS: &str = "https://www.nushell.sh/cookbook/http.html";
+
 #[derive(PartialEq, Eq)]
 pub enum BodyType {
     Json,
@@ -221,45 +223,48 @@ pub fn send_request(
                 _ => (BodyType::Unknown, request),
             };
 
-            match body {
-                Value::Binary { val, .. } => send_cancellable_request(
-                    &request_url,
-                    Box::new(move || req.send_bytes(&val)),
-                    span,
-                    signals,
-                ),
-                Value::String { .. } if body_type == BodyType::Json => {
-                    let data = value_to_json_value(&body)?;
-                    send_cancellable_request(
-                        &request_url,
-                        Box::new(|| req.send_json(data)),
-                        span,
-                        signals,
-                    )
+            match body_type {
+                BodyType::Json => send_json_request(&request_url, body, req, span, signals),
+                BodyType::Form => send_form_request(&request_url, body, req, span, signals),
+                BodyType::Multipart => {
+                    send_multipart_request(&request_url, body, req, span, signals)
+                }
+                BodyType::Unknown => send_default_request(&request_url, body, req, span, signals),
+            }
         }
-                Value::String { val, .. } => send_cancellable_request(
-                    &request_url,
-                    Box::new(move || req.send_string(&val)),
-                    span,
-                    signals,
-                ),
-                Value::Record { .. } if body_type == BodyType::Json => {
-                    let data = value_to_json_value(&body)?;
-                    send_cancellable_request(
-                        &request_url,
-                        Box::new(|| req.send_json(data)),
-                        span,
-                        signals,
-                    )
     }
-                Value::Record { val, .. } if body_type == BodyType::Form => {
-                    let mut data: Vec<(String, String)> = Vec::with_capacity(val.len());
-
-                    for (col, val) in val.into_owned() {
-                        data.push((col, val.coerce_into_string()?))
 }
 
-                    let request_fn = move || {
+fn send_json_request(
+    request_url: &str,
+    body: Value,
+    req: Request,
+    span: Span,
+    signals: &Signals,
+) -> Result<Response, ShellErrorOrRequestError> {
+    let data = match body {
+        Value::Int { .. } | Value::List { .. } | Value::String { .. } | Value::Record { .. } => {
+            value_to_json_value(&body)?
+        }
+        _ => {
+            return Err(ShellErrorOrRequestError::ShellError(
+                ShellError::UnsupportedHttpBody {
+                    msg: format!("Accepted types: [Int, List, String, Record]. Check: {HTTP_DOCS}"),
+                },
+            ))
+        }
+    };
+    send_cancellable_request(request_url, Box::new(|| req.send_json(data)), span, signals)
+}
+
+fn send_form_request(
+    request_url: &str,
+    body: Value,
+    req: Request,
+    span: Span,
+    signals: &Signals,
+) -> Result<Response, ShellErrorOrRequestError> {
+    let build_request_fn = |data: Vec<(String, String)>| {
         // coerce `data` into a shape that send_form() is happy with
         let data = data
             .iter()
@@ -267,10 +272,50 @@ pub fn send_request(
             .collect::<Vec<(&str, &str)>>();
         req.send_form(&data)
     };
-                    send_cancellable_request(&request_url, Box::new(request_fn), span, signals)
+
+    match body {
+        Value::List { vals, .. } => {
+            if vals.len() % 2 != 0 {
+                return Err(ShellErrorOrRequestError::ShellError(ShellError::UnsupportedHttpBody {
+                    msg: "Body type 'List' for form requests requires paired values. E.g.: [value, 10]".into(),
+                }));
             }
-                // multipart form upload
-                Value::Record { val, .. } if body_type == BodyType::Multipart => {
+
+            let data = vals
+                .chunks(2)
+                .map(|it| Ok((it[0].coerce_string()?, it[1].coerce_string()?)))
+                .collect::<Result<Vec<(String, String)>, ShellErrorOrRequestError>>()?;
+
+            let request_fn = Box::new(|| build_request_fn(data));
+            send_cancellable_request(request_url, request_fn, span, signals)
+        }
+        Value::Record { val, .. } => {
+            let mut data: Vec<(String, String)> = Vec::with_capacity(val.len());
+
+            for (col, val) in val.into_owned() {
+                data.push((col, val.coerce_into_string()?))
+            }
+
+            let request_fn = Box::new(|| build_request_fn(data));
+            send_cancellable_request(request_url, request_fn, span, signals)
+        }
+        _ => Err(ShellErrorOrRequestError::ShellError(
+            ShellError::UnsupportedHttpBody {
+                msg: format!("Accepted types: [List, Record]. Check: {HTTP_DOCS}"),
+            },
+        )),
+    }
+}
+
+fn send_multipart_request(
+    request_url: &str,
+    body: Value,
+    req: Request,
+    span: Span,
+    signals: &Signals,
+) -> Result<Response, ShellErrorOrRequestError> {
+    let request_fn = match body {
+        Value::Record { val, .. } => {
             let mut builder = MultipartWriter::new();
 
             let err = |e| {
@@ -294,8 +339,7 @@ pub fn send_request(
                         .add(&mut Cursor::new(val), &headers.join("\n"))
                         .map_err(err)?;
                 } else {
-                            let headers =
-                                format!(r#"Content-Disposition: form-data; name="{}""#, col);
+                    let headers = format!(r#"Content-Disposition: form-data; name="{}""#, col);
                     builder
                         .add(val.coerce_into_string()?.as_bytes(), &headers)
                         .map_err(err)?;
@@ -306,47 +350,44 @@ pub fn send_request(
             let (boundary, data) = (builder.boundary, builder.data);
             let content_type = format!("multipart/form-data; boundary={}", boundary);
 
-                    let request_fn =
-                        move || req.set("Content-Type", &content_type).send_bytes(&data);
-
-                    send_cancellable_request(&request_url, Box::new(request_fn), span, signals)
+            move || req.set("Content-Type", &content_type).send_bytes(&data)
         }
-                Value::List { vals, .. } if body_type == BodyType::Form => {
-                    if vals.len() % 2 != 0 {
-                        return Err(ShellErrorOrRequestError::ShellError(ShellError::IOError {
-                            msg: "unsupported body input".into(),
-                        }));
+        _ => {
+            return Err(ShellErrorOrRequestError::ShellError(
+                ShellError::UnsupportedHttpBody {
+                    msg: format!("Accepted types: [Record]. Check: {HTTP_DOCS}"),
+                },
+            ))
         }
-
-                    let data = vals
-                        .chunks(2)
-                        .map(|it| Ok((it[0].coerce_string()?, it[1].coerce_string()?)))
-                        .collect::<Result<Vec<(String, String)>, ShellErrorOrRequestError>>()?;
-
-                    let request_fn = move || {
-                        // coerce `data` into a shape that send_form() is happy with
-                        let data = data
-                            .iter()
-                            .map(|(a, b)| (a.as_str(), b.as_str()))
-                            .collect::<Vec<(&str, &str)>>();
-                        req.send_form(&data)
     };
-                    send_cancellable_request(&request_url, Box::new(request_fn), span, signals)
+    send_cancellable_request(request_url, Box::new(request_fn), span, signals)
 }
-                Value::List { .. } if body_type == BodyType::Json => {
-                    let data = value_to_json_value(&body)?;
-                    send_cancellable_request(
-                        &request_url,
-                        Box::new(|| req.send_json(data)),
+
+fn send_default_request(
+    request_url: &str,
+    body: Value,
+    req: Request,
+    span: Span,
+    signals: &Signals,
+) -> Result<Response, ShellErrorOrRequestError> {
+    match body {
+        Value::Binary { val, .. } => send_cancellable_request(
+            request_url,
+            Box::new(move || req.send_bytes(&val)),
             span,
             signals,
-                    )
-                }
-                _ => Err(ShellErrorOrRequestError::ShellError(ShellError::IOError {
-                    msg: "unsupported body input".into(),
-                })),
-            }
-        }
+        ),
+        Value::String { val, .. } => send_cancellable_request(
+            request_url,
+            Box::new(move || req.send_string(&val)),
+            span,
+            signals,
+        ),
+        _ => Err(ShellErrorOrRequestError::ShellError(
+            ShellError::UnsupportedHttpBody {
+                msg: format!("Accepted types: [Binary, String]. Check: {HTTP_DOCS}"),
+            },
+        )),
     }
 }
 

crates/nu-command/tests/commands/network/http/post.rs

@@ -133,6 +133,36 @@ fn http_post_json_list_is_success() {
     assert!(actual.out.is_empty())
 }
 
+#[test]
+fn http_post_json_int_is_success() {
+    let mut server = Server::new();
+
+    let mock = server.mock("POST", "/").match_body(r#"50"#).create();
+
+    let actual = nu!(format!(
+        r#"http post -t 'application/json' {url} 50"#,
+        url = server.url()
+    ));
+
+    mock.assert();
+    assert!(actual.out.is_empty())
+}
+
+#[test]
+fn http_post_json_string_is_success() {
+    let mut server = Server::new();
+
+    let mock = server.mock("POST", "/").match_body(r#""test""#).create();
+
+    let actual = nu!(format!(
+        r#"http post -t 'application/json' {url} "test""#,
+        url = server.url()
+    ));
+
+    mock.assert();
+    assert!(actual.out.is_empty())
+}
+
 #[test]
 fn http_post_follows_redirect() {
     let mut server = Server::new();

crates/nu-protocol/src/errors/shell_error.rs

@@ -639,6 +639,15 @@ pub enum ShellError {
         span: Span,
     },
 
+    /// An unsupported body input was used for the respective application body type in 'http' command
+    ///
+    /// ## Resolution
+    ///
+    /// This error is fairly generic. Refer to the specific error message for further details.
+    #[error("Unsupported body for current content type")]
+    #[diagnostic(code(nu::shell::unsupported_body), help("{msg}"))]
+    UnsupportedHttpBody { msg: String },
+
     /// An operation was attempted with an input unsupported for some reason.
     ///
     /// ## Resolution