Add a field to store the HTTP status in Errors.

Having the status code chucked in the string message made it hard to
machine-read it. The only uses of the "message" field where simply
copying the code in there. I moved that to the display impl.

Cargo.toml

@@ -29,6 +29,7 @@ tracing = "0.1"
 url = "2"
 
 http = { version = "0.2", optional = true }
+http-serde = { version = "1.1.0", optional = true }
 nom = { version = "6", optional = true }
 openid = { version = "0.9.1", optional = true }
 opentelemetry = { version = "0.17", optional = true }
@@ -37,10 +38,10 @@ reqwest = { version = "0.11", features = ["json"], optional = true }
 reqwest-wasm-ext = { git = "https://github.com/ctron/reqwest-wasm-ext.git", optional = true }
 
 [features]
-default = ["reqwest", "openid", "telemetry", "nom"]
+default = ["reqwest", "openid", "telemetry", "nom", "http-serde"]
 telemetry = ["opentelemetry", "opentelemetry-http", "http"]
 # alternate default target for wasm
-wasm = ["reqwest", "reqwest-wasm-ext", "nom"]
+wasm = ["reqwest", "reqwest-wasm-ext", "nom", "http-serde"]
 reqwest = ["dep:reqwest", "reqwest-wasm-ext"]
 
 [dev-dependencies]

src/error.rs

@@ -1,3 +1,4 @@
+use reqwest::StatusCode;
 use serde::{Deserialize, Serialize};
 use std::fmt;
 use url::ParseError;
@@ -7,6 +8,9 @@ use url::ParseError;
 pub struct ErrorInformation {
     /// A machine processable error type.
     pub error: String,
+    /// A machine processable HTTP Status code.
+    #[serde(with = "http_serde::status_code")]
+    pub status: StatusCode,
     /// A human readable error message.
     #[serde(default)]
     pub message: String,

src/util/client/mod.rs

@@ -194,15 +194,21 @@ pub trait Client {
                     Ok(json) => ErrorInformation {
                         error: json,
                         message: format!("HTTP {}", code),
+                        status: code,
                     },
                     Err(_) => ErrorInformation {
                         error: String::default(),
                         message: format!("HTTP error {}", code),
+                        status: code,
                     },
                 };
                 Err(ClientError::Service(error))
             }
-            code => Err(ClientError::Request(format!("Unexpected code {:?}", code))),
+            code => Err(ClientError::Service(ErrorInformation {
+                error: String::default(),
+                message: format!("Unexpected HTTP code {:?}", code),
+                status: code,
+            })),
         }
     }
 }