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use std::fmt::{Display, Formatter};
use std::str::from_utf8;
use base64::encode;
use bytes::{Bytes, BytesMut};
use log::*;
use serde::{Deserialize, Serialize};
use serde_json::{json, Value};
use crate::content_types::ContentType;
#[derive(Debug, Clone, PartialEq, Eq, Hash, Deserialize, Serialize)]
#[serde(untagged)]
pub enum OptionalBody {
Missing,
Empty,
Null,
Present(Bytes, Option<ContentType>)
}
impl OptionalBody {
pub fn is_present(&self) -> bool {
match *self {
OptionalBody::Present(_, _) => true,
_ => false
}
}
pub fn value(&self) -> Option<Bytes> {
match self {
OptionalBody::Present(s, _) => Some(s.clone()),
_ => None
}
}
pub fn str_value(&self) -> &str {
match self {
OptionalBody::Present(s, _) => from_utf8(s).unwrap_or(""),
_ => ""
}
}
pub fn has_content_type(&self) -> bool {
match self {
OptionalBody::Present(_, content_type) => content_type.is_some(),
_ => false
}
}
pub fn content_type(&self) -> Option<ContentType> {
match self {
OptionalBody::Present(_, content_type) =>
content_type.clone(),
_ => None
}
}
pub fn to_v4_json(&self) -> Value {
match self {
OptionalBody::Present(bytes, _) => {
let content_type = self.content_type().unwrap_or_default();
let (contents, encoded) = if content_type.is_json() {
match serde_json::from_slice(bytes) {
Ok(json_body) => (json_body, Value::Bool(false)),
Err(err) => {
warn!("Failed to parse json body: {}", err);
(Value::String(encode(bytes)), Value::String("base64".to_string()))
}
}
} else if content_type.is_binary() {
(Value::String(encode(bytes)), Value::String("base64".to_string()))
} else {
match from_utf8(bytes) {
Ok(s) => (Value::String(s.to_string()), Value::Bool(false)),
Err(_) => (Value::String(encode(bytes)), Value::String("base64".to_string()))
}
};
json!({
"content": contents,
"contentType": content_type.to_string(),
"encoded": encoded
})
},
OptionalBody::Empty => json!({"content": ""}),
_ => Value::Null
}
}
}
impl From<String> for OptionalBody {
fn from(s: String) -> Self {
if s.is_empty() {
OptionalBody::Empty
} else {
OptionalBody::Present(Bytes::from(s), None)
}
}
}
impl <'a> From<&'a str> for OptionalBody {
fn from(s: &'a str) -> Self {
if s.is_empty() {
OptionalBody::Empty
} else {
let mut buf = BytesMut::with_capacity(0);
buf.extend_from_slice(s.as_bytes());
OptionalBody::Present(buf.freeze(), None)
}
}
}
impl Display for OptionalBody {
fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
match *self {
OptionalBody::Missing => write!(f, "Missing"),
OptionalBody::Empty => write!(f, "Empty"),
OptionalBody::Null => write!(f, "Null"),
OptionalBody::Present(ref s, ref content_type) => {
if let Some(content_type) = content_type {
write!(f, "Present({} bytes, {})", s.len(), content_type)
} else {
write!(f, "Present({} bytes)", s.len())
}
}
}
}
}
impl Default for OptionalBody {
fn default() -> Self {
OptionalBody::Missing
}
}
#[cfg(test)]
mod tests {
use expectest::prelude::*;
use crate::content_types::JSON;
use super::OptionalBody;
#[test]
fn display_tests() {
expect!(format!("{}", OptionalBody::Missing)).to(be_equal_to("Missing"));
expect!(format!("{}", OptionalBody::Empty)).to(be_equal_to("Empty"));
expect!(format!("{}", OptionalBody::Null)).to(be_equal_to("Null"));
expect!(format!("{}", OptionalBody::Present("hello".into(), None))).to(be_equal_to("Present(5 bytes)"));
expect!(format!("{}", OptionalBody::Present("\"hello\"".into(), Some(JSON.clone())))).to(be_equal_to("Present(7 bytes, application/json)"));
}
}