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Split into several files and make more APIs

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This commit is contained in:
Alex 2023-02-02 15:17:23 +01:00
parent 1922017831
commit 552fc7e5a0
8 changed files with 743 additions and 255 deletions
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4
Cargo.toml
View file

@ -15,6 +15,8 @@ serde = { version = "1.0.149", features = ["derive"] }
log = "0.4" log = "0.4"
bytes = "1" bytes = "1"
reqwest = { version = "0.11", default-features = false, features = ["json", "rustls-tls-manual-roots" ] } reqwest = { version = "0.11", default-features = false, features = ["json", "rustls-tls-manual-roots" ] }
tokio = { version = "1.23", default-features = false, features = [ "macros" ] }
futures = "0.3.25"
[dev-dependencies] [dev-dependencies]
tokio = { version = "1.22", features = ["rt", "rt-multi-thread", "macros"] } tokio = { version = "1.23", features = ["rt", "rt-multi-thread", "macros"] }

206
examples/health-service-1.json Normal file
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@ -0,0 +1,206 @@
[
{
"Node": {
"ID": "9ccf821c-5e3e-cbe0-3727-0b0e5df35412",
"Node": "celeri",
"Address": "10.83.1.3",
"Datacenter": "prod",
"TaggedAddresses": {
"lan": "10.83.1.3",
"lan_ipv4": "10.83.1.3",
"wan": "10.83.1.3",
"wan_ipv4": "10.83.1.3"
},
"Meta": {
"cname_target": "neptune.site.deuxfleurs.fr.",
"consul-network-segment": "",
"public_ipv4": "77.207.15.215",
"public_ipv6": "2001:910:1204:1::33",
"site": "neptune"
},
"CreateIndex": 28797576,
"ModifyIndex": 28797584
},
"Service": {
"ID": "_nomad-task-c7132dd2-cc89-cbb4-5e53-6bd7c8c33677-front-https-jitsi-https_port",
"Service": "https-jitsi",
"Tags": [
"jitsi",
"tricot jitsi.deuxfleurs.fr",
"d53-cname jitsi.deuxfleurs.fr"
],
"Address": "10.83.1.3",
"TaggedAddresses": {
"lan_ipv4": {
"Address": "10.83.1.3",
"Port": 30140
},
"wan_ipv4": {
"Address": "10.83.1.3",
"Port": 30140
}
},
"Meta": {
"external-source": "nomad"
},
"Port": 30140,
"Weights": {
"Passing": 1,
"Warning": 1
},
"EnableTagOverride": false,
"Proxy": {
"Mode": "",
"MeshGateway": {},
"Expose": {}
},
"Connect": {},
"CreateIndex": 29922481,
"ModifyIndex": 29922481
},
"Checks": [
{
"Node": "celeri",
"CheckID": "serfHealth",
"Name": "Serf Health Status",
"Status": "critical",
"Notes": "",
"Output": "Agent not live or unreachable",
"ServiceID": "",
"ServiceName": "",
"ServiceTags": [],
"Type": "",
"Interval": "",
"Timeout": "",
"ExposedPort": 0,
"Definition": {},
"CreateIndex": 28797576,
"ModifyIndex": 32831331
},
{
"Node": "celeri",
"CheckID": "_nomad-check-1e8b81aa1790b51ffdf12117760d851bf00cb96f",
"Name": "service: \"https-jitsi\" check",
"Status": "passing",
"Notes": "",
"Output": "TCP connect 10.83.1.3:30140: Success",
"ServiceID": "_nomad-task-c7132dd2-cc89-cbb4-5e53-6bd7c8c33677-front-https-jitsi-https_port",
"ServiceName": "https-jitsi",
"ServiceTags": [
"jitsi",
"tricot jitsi.deuxfleurs.fr",
"d53-cname jitsi.deuxfleurs.fr"
],
"Type": "tcp",
"Interval": "1m0s",
"Timeout": "1m0s",
"ExposedPort": 0,
"Definition": {},
"CreateIndex": 29922481,
"ModifyIndex": 29922617
}
]
},
{
"Node": {
"ID": "cee1c827-ff32-6f38-a815-69038a961a80",
"Node": "dahlia",
"Address": "10.83.2.1",
"Datacenter": "prod",
"TaggedAddresses": {
"lan": "10.83.2.1",
"lan_ipv4": "10.83.2.1",
"wan": "10.83.2.1",
"wan_ipv4": "10.83.2.1"
},
"Meta": {
"cname_target": "orion.site.deuxfleurs.fr.",
"consul-network-segment": "",
"public_ipv4": "82.66.80.201",
"public_ipv6": "2a01:e0a:28f:5e60::11",
"site": "orion"
},
"CreateIndex": 31880680,
"ModifyIndex": 31880870
},
"Service": {
"ID": "_nomad-task-8214d936-aab2-35b4-d24e-8941a2d3b5b0-front-https-jitsi-https_port",
"Service": "https-jitsi",
"Tags": [
"jitsi",
"tricot jitsi.deuxfleurs.fr",
"d53-cname jitsi.deuxfleurs.fr"
],
"Address": "10.83.2.1",
"TaggedAddresses": {
"lan_ipv4": {
"Address": "10.83.2.1",
"Port": 25753
},
"wan_ipv4": {
"Address": "10.83.2.1",
"Port": 25753
}
},
"Meta": {
"external-source": "nomad"
},
"Port": 25753,
"Weights": {
"Passing": 1,
"Warning": 1
},
"EnableTagOverride": false,
"Proxy": {
"Mode": "",
"MeshGateway": {},
"Expose": {}
},
"Connect": {},
"CreateIndex": 33002874,
"ModifyIndex": 33002874
},
"Checks": [
{
"Node": "dahlia",
"CheckID": "serfHealth",
"Name": "Serf Health Status",
"Status": "passing",
"Notes": "",
"Output": "Agent alive and reachable",
"ServiceID": "",
"ServiceName": "",
"ServiceTags": [],
"Type": "",
"Interval": "",
"Timeout": "",
"ExposedPort": 0,
"Definition": {},
"CreateIndex": 31880680,
"ModifyIndex": 31880680
},
{
"Node": "dahlia",
"CheckID": "_nomad-check-75542d8bde0dd9887ff8af10a02bf6a1f605695d",
"Name": "service: \"https-jitsi\" check",
"Status": "passing",
"Notes": "",
"Output": "TCP connect 10.83.2.1:25753: Success",
"ServiceID": "_nomad-task-8214d936-aab2-35b4-d24e-8941a2d3b5b0-front-https-jitsi-https_port",
"ServiceName": "https-jitsi",
"ServiceTags": [
"jitsi",
"tricot jitsi.deuxfleurs.fr",
"d53-cname jitsi.deuxfleurs.fr"
],
"Type": "tcp",
"Interval": "1m0s",
"Timeout": "1m0s",
"ExposedPort": 0,
"Definition": {},
"CreateIndex": 33002874,
"ModifyIndex": 33002958
}
]
}
]

41
examples/test.rs
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@ -13,12 +13,41 @@ async fn main() {
let consul = Consul::new(config, "").unwrap(); let consul = Consul::new(config, "").unwrap();
println!("== LIST NODES =="); println!("== LIST NODES ==");
let list_nodes = consul.list_nodes().await.unwrap(); let nodes = consul.catalog_node_list(None).await.unwrap();
println!("{:?}", list_nodes); println!("{:?}", nodes);
println!("== CATALOG 1 =="); if let Some(node) = nodes.first() {
println!("{:?}", consul.watch_node("caribou", None).await.unwrap()); println!("== NODE {} ==", node.node);
println!("{:?}", consul.catalog_node(&node.node, None).await.unwrap());
}
println!("== CATALOG 2 =="); println!("== LIST SERVICES ==");
println!("{:?}", consul.watch_node("cariacou", None).await.unwrap()); let services = consul.catalog_service_list(None).await.unwrap();
println!("{:?}", services);
if let Some(service) = services.keys().next() {
println!("== SERVICE NODES {} ==", service);
println!(
"{:?}",
consul.catalog_service_nodes(service, None).await.unwrap()
);
println!("== SERVICE HEALTH {} ==", service);
println!(
"{:?}",
consul
.health_service_instances(service, None)
.await
.unwrap()
);
}
println!("== WATCHING EVERYTHING ==");
let mut watch = consul.watch_all_service_health();
loop {
if watch.changed().await.is_err() {
break;
}
println!("\n{:?}", watch.borrow_and_update());
}
} }

230
src/catalog.rs Normal file
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@ -0,0 +1,230 @@
use std::collections::HashMap;
use std::fmt::Write;
use std::sync::Arc;
use std::time::Duration;
use anyhow::Result;
use futures::future::BoxFuture;
use futures::stream::futures_unordered::FuturesUnordered;
use futures::{FutureExt, StreamExt};
use log::*;
use serde::{Deserialize, Serialize};
use tokio::select;
use tokio::sync::watch;
use crate::{Consul, WithIndex};
#[derive(Serialize, Deserialize, Debug, Clone)]
#[serde(rename_all = "PascalCase")]
pub struct ConsulNode {
pub node: String,
pub address: String,
pub meta: HashMap<String, String>,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
#[serde(rename_all = "PascalCase")]
pub struct ConsulService {
pub service: String,
pub address: String,
pub port: u16,
pub tags: Vec<String>,
}
#[derive(Serialize, Deserialize, Debug)]
#[serde(rename_all = "PascalCase")]
pub struct ConsulCatalogNode {
pub node: ConsulNode,
pub services: HashMap<String, ConsulService>,
}
pub type ConsulServiceList = HashMap<String, Vec<String>>;
#[derive(Serialize, Deserialize, Debug)]
#[serde(rename_all = "PascalCase")]
pub struct ConsulServiceNode {
pub node: String,
pub address: String,
pub node_meta: HashMap<String, String>,
pub service_name: String,
pub service_tags: Vec<String>,
pub service_address: String,
pub service_port: u16,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
#[serde(rename_all = "PascalCase")]
pub struct ConsulHealthServiceNode {
pub node: ConsulNode,
pub service: ConsulService,
pub checks: Vec<ConsulHealthCheck>,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
#[serde(rename_all = "PascalCase")]
pub struct ConsulHealthCheck {
pub node: String,
#[serde(rename = "CheckID")]
pub check_id: String,
pub name: String,
pub status: String,
pub output: String,
#[serde(rename = "Type")]
pub type_: String,
}
pub type AllServiceHealth = HashMap<String, Arc<[ConsulHealthServiceNode]>>;
impl Consul {
pub async fn catalog_node_list(
&self,
last_index: Option<usize>,
) -> Result<WithIndex<Vec<ConsulNode>>> {
self.get_with_index(format!("{}/v1/catalog/nodes", self.url), last_index)
.await
}
pub async fn catalog_node(
&self,
host: &str,
last_index: Option<usize>,
) -> Result<WithIndex<Option<ConsulCatalogNode>>> {
self.get_with_index(format!("{}/v1/catalog/node/{}", self.url, host), last_index)
.await
}
pub async fn catalog_service_list(
&self,
last_index: Option<usize>,
) -> Result<WithIndex<ConsulServiceList>> {
self.get_with_index::<ConsulServiceList>(
format!("{}/v1/catalog/services", self.url),
last_index,
)
.await
}
pub async fn catalog_service_nodes(
&self,
service: &str,
last_index: Option<usize>,
) -> Result<WithIndex<Vec<ConsulServiceNode>>> {
self.get_with_index(
format!("{}/v1/catalog/service/{}", self.url, service),
last_index,
)
.await
}
pub async fn health_service_instances(
&self,
service: &str,
last_index: Option<usize>,
) -> Result<WithIndex<Vec<ConsulHealthServiceNode>>> {
self.get_with_index(
format!("{}/v1/health/service/{}", self.url, service),
last_index,
)
.await
}
pub fn watch_all_service_health(&self) -> watch::Receiver<AllServiceHealth> {
let (tx, rx) = watch::channel(HashMap::new());
tokio::spawn(do_watch_all_service_health(self.clone(), tx));
rx
}
async fn get_with_index<T: for<'de> Deserialize<'de>>(
&self,
mut url: String,
last_index: Option<usize>,
) -> Result<WithIndex<T>> {
if let Some(i) = last_index {
if url.contains('?') {
write!(&mut url, "&index={}", i).unwrap();
} else {
write!(&mut url, "?index={}", i).unwrap();
}
}
debug!("GET {} as {}", url, std::any::type_name::<T>());
let http = self.client.get(&url).send().await?;
Ok(WithIndex::<T>::index_from(&http)?.value(http.json().await?))
}
}
async fn do_watch_all_service_health(consul: Consul, tx: watch::Sender<AllServiceHealth>) {
let mut services = AllServiceHealth::new();
let mut service_watchers = FuturesUnordered::<BoxFuture<(String, Result<_>)>>::new();
let mut service_list: BoxFuture<Result<_>> = Box::pin(consul.catalog_service_list(None));
loop {
select! {
list_res = &mut service_list => {
match list_res {
Ok(list) => {
let list_index = list.index();
for service in list.into_inner().keys() {
if !services.contains_key(service) {
services.insert(service.to_string(), Arc::new([]));
let service = service.to_string();
service_watchers.push(Box::pin(async {
let res = consul.health_service_instances(&service, None).await;
(service, res)
}));
}
}
service_list = Box::pin(consul.catalog_service_list(Some(list_index)));
}
Err(e) => {
warn!("Error listing services: {}", e);
service_list = Box::pin(async {
tokio::time::sleep(Duration::from_secs(30)).await;
consul.catalog_service_list(None).await
});
}
}
}
(service, watch_res) = service_watchers.next().then(some_or_pending) => {
match watch_res {
Ok(nodes) => {
let index = nodes.index();
services.insert(service.clone(), nodes.into_inner().into());
let consul = &consul;
service_watchers.push(Box::pin(async move {
let res = consul.health_service_instances(&service, Some(index)).await;
(service, res)
}));
if tx.send(services.clone()).is_err() {
break;
}
}
Err(e) => {
warn!("Error getting service {}: {}", service, e);
service_watchers.push(Box::pin(async {
tokio::time::sleep(Duration::from_secs(30)).await;
let res = consul.health_service_instances(&service, None).await;
(service, res)
}));
}
}
}
_ = tx.closed() => {
break;
}
}
}
}
async fn some_or_pending<T>(value: Option<T>) -> T {
match value {
Some(v) => v,
None => futures::future::pending().await,
}
}

64
src/kv.rs Normal file
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@ -0,0 +1,64 @@
use anyhow::{anyhow, Result};
use bytes::Bytes;
use log::*;
use reqwest::StatusCode;
use serde::{Deserialize, Serialize};
use crate::Consul;
impl Consul {
pub async fn kv_get(&self, key: &str) -> Result<Option<Bytes>> {
debug!("kv_get {}", key);
let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key);
let http = self.client.get(&url).send().await?;
match http.status() {
StatusCode::OK => Ok(Some(http.bytes().await?)),
StatusCode::NOT_FOUND => Ok(None),
_ => Err(anyhow!(
"Consul request failed: {:?}",
http.error_for_status()
)),
}
}
pub async fn kv_get_json<T: for<'de> Deserialize<'de>>(&self, key: &str) -> Result<Option<T>> {
debug!("kv_get_json {}", key);
let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key);
let http = self.client.get(&url).send().await?;
match http.status() {
StatusCode::OK => Ok(Some(http.json().await?)),
StatusCode::NOT_FOUND => Ok(None),
_ => Err(anyhow!(
"Consul request failed: {:?}",
http.error_for_status()
)),
}
}
pub async fn kv_put(&self, key: &str, bytes: Bytes) -> Result<()> {
debug!("kv_put {}", key);
let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
let http = self.client.put(&url).body(bytes).send().await?;
http.error_for_status()?;
Ok(())
}
pub async fn kv_put_json<T: Serialize>(&self, key: &str, value: &T) -> Result<()> {
debug!("kv_put_json {}", key);
let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
let http = self.client.put(&url).json(value).send().await?;
http.error_for_status()?;
Ok(())
}
pub async fn kv_delete(&self, key: &str) -> Result<()> {
let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
let http = self.client.delete(&url).send().await?;
http.error_for_status()?;
Ok(())
}
}

199
src/lib.rs
View file

@ -1,12 +1,14 @@
use std::collections::HashMap; mod catalog;
mod kv;
mod locking;
mod with_index;
use std::fs::File; use std::fs::File;
use std::io::Read; use std::io::Read;
use anyhow::{anyhow, bail, Result}; use anyhow::{bail, Result};
use bytes::Bytes;
use log::*; pub use with_index::WithIndex;
use reqwest::StatusCode;
use serde::{Deserialize, Serialize};
pub struct ConsulConfig { pub struct ConsulConfig {
pub addr: String, pub addr: String,
@ -16,67 +18,6 @@ pub struct ConsulConfig {
pub client_key: Option<String>, pub client_key: Option<String>,
} }
// ---- Watch and retrieve Consul catalog ----
//
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulNode {
#[serde(rename = "Node")]
pub node: String,
#[serde(rename = "Address")]
pub address: String,
#[serde(rename = "Meta")]
pub meta: HashMap<String, String>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulServiceEntry {
#[serde(rename = "Service")]
pub service: String,
#[serde(rename = "Address")]
pub address: String,
#[serde(rename = "Port")]
pub port: u16,
#[serde(rename = "Tags")]
pub tags: Vec<String>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulNodeCatalog {
#[serde(rename = "Node")]
pub node: ConsulNode,
#[serde(rename = "Services")]
pub services: HashMap<String, ConsulServiceEntry>,
}
// ---- Consul session management ----
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulSessionRequest {
#[serde(rename = "Name")]
pub name: String,
#[serde(rename = "Node")]
pub node: Option<String>,
#[serde(rename = "LockDelay")]
pub lock_delay: Option<String>,
#[serde(rename = "TTL")]
pub ttl: Option<String>,
#[serde(rename = "Behavior")]
pub behavior: Option<String>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulSessionResponse {
#[serde(rename = "ID")]
pub id: String,
}
#[derive(Clone)] #[derive(Clone)]
pub struct Consul { pub struct Consul {
client: reqwest::Client, client: reqwest::Client,
@ -131,128 +72,4 @@ impl Consul {
kv_prefix: kv_prefix.to_string(), kv_prefix: kv_prefix.to_string(),
}) })
} }
pub async fn list_nodes(&self) -> Result<Vec<ConsulNode>> {
debug!("list_nodes");
let url = format!("{}/v1/catalog/nodes", self.url);
let http = self.client.get(&url).send().await?;
let resp: Vec<ConsulNode> = http.json().await?;
Ok(resp)
}
pub async fn watch_node(
&self,
host: &str,
idx: Option<usize>,
) -> Result<(Option<ConsulNodeCatalog>, usize)> {
debug!("watch_node {} {:?}", host, idx);
let url = match idx {
Some(i) => format!("{}/v1/catalog/node/{}?index={}", self.url, host, i),
None => format!("{}/v1/catalog/node/{}", self.url, host),
};
let http = self.client.get(&url).send().await?;
let new_idx = match http.headers().get("X-Consul-Index") {
Some(v) => v.to_str()?.parse::<usize>()?,
None => bail!("X-Consul-Index header not found"),
};
let resp: Option<ConsulNodeCatalog> = http.json().await?;
Ok((resp, new_idx))
}
// ---- KV get and put ----
pub async fn kv_get(&self, key: &str) -> Result<Option<Bytes>> {
debug!("kv_get {}", key);
let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key);
let http = self.client.get(&url).send().await?;
match http.status() {
StatusCode::OK => Ok(Some(http.bytes().await?)),
StatusCode::NOT_FOUND => Ok(None),
_ => Err(anyhow!(
"Consul request failed: {:?}",
http.error_for_status()
)),
}
}
pub async fn kv_get_json<T: for<'de> Deserialize<'de>>(&self, key: &str) -> Result<Option<T>> {
debug!("kv_get_json {}", key);
let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key);
let http = self.client.get(&url).send().await?;
match http.status() {
StatusCode::OK => Ok(Some(http.json().await?)),
StatusCode::NOT_FOUND => Ok(None),
_ => Err(anyhow!(
"Consul request failed: {:?}",
http.error_for_status()
)),
}
}
pub async fn kv_put(&self, key: &str, bytes: Bytes) -> Result<()> {
debug!("kv_put {}", key);
let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
let http = self.client.put(&url).body(bytes).send().await?;
http.error_for_status()?;
Ok(())
}
pub async fn kv_put_json<T: Serialize>(&self, key: &str, value: &T) -> Result<()> {
debug!("kv_put_json {}", key);
let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
let http = self.client.put(&url).json(value).send().await?;
http.error_for_status()?;
Ok(())
}
pub async fn kv_delete(&self, key: &str) -> Result<()> {
let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
let http = self.client.delete(&url).send().await?;
http.error_for_status()?;
Ok(())
}
// ---- Locking ----
pub async fn create_session(&self, req: &ConsulSessionRequest) -> Result<String> {
debug!("create_session {:?}", req);
let url = format!("{}/v1/session/create", self.url);
let http = self.client.put(&url).json(req).send().await?;
let resp: ConsulSessionResponse = http.json().await?;
Ok(resp.id)
}
pub async fn acquire(&self, key: &str, bytes: Bytes, session: &str) -> Result<bool> {
debug!("acquire {}", key);
let url = format!(
"{}/v1/kv/{}{}?acquire={}",
self.url, self.kv_prefix, key, session
);
let http = self.client.put(&url).body(bytes).send().await?;
let resp: bool = http.json().await?;
Ok(resp)
}
pub async fn release(&self, key: &str, bytes: Bytes, session: &str) -> Result<()> {
debug!("release {}", key);
let url = format!(
"{}/v1/kv/{}{}?release={}",
self.url, self.kv_prefix, key, session
);
let http = self.client.put(&url).body(bytes).send().await?;
http.error_for_status()?;
Ok(())
}
} }

65
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use anyhow::Result;
use bytes::Bytes;
use log::*;
use serde::{Deserialize, Serialize};
use crate::Consul;
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulSessionRequest {
#[serde(rename = "Name")]
pub name: String,
#[serde(rename = "Node")]
pub node: Option<String>,
#[serde(rename = "LockDelay")]
pub lock_delay: Option<String>,
#[serde(rename = "TTL")]
pub ttl: Option<String>,
#[serde(rename = "Behavior")]
pub behavior: Option<String>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct ConsulSessionResponse {
#[serde(rename = "ID")]
pub id: String,
}
impl Consul {
pub async fn create_session(&self, req: &ConsulSessionRequest) -> Result<String> {
debug!("create_session {:?}", req);
let url = format!("{}/v1/session/create", self.url);
let http = self.client.put(&url).json(req).send().await?;
let resp: ConsulSessionResponse = http.json().await?;
Ok(resp.id)
}
pub async fn acquire(&self, key: &str, bytes: Bytes, session: &str) -> Result<bool> {
debug!("acquire {}", key);
let url = format!(
"{}/v1/kv/{}{}?acquire={}",
self.url, self.kv_prefix, key, session
);
let http = self.client.put(&url).body(bytes).send().await?;
let resp: bool = http.json().await?;
Ok(resp)
}
pub async fn release(&self, key: &str, bytes: Bytes, session: &str) -> Result<()> {
debug!("release {}", key);
let url = format!(
"{}/v1/kv/{}{}?release={}",
self.url, self.kv_prefix, key, session
);
let http = self.client.put(&url).body(bytes).send().await?;
http.error_for_status()?;
Ok(())
}
}

75
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use std::fmt::{Debug, Display};
use anyhow::{bail, Result};
use reqwest::Response;
pub struct WithIndex<T> {
value: T,
index: usize,
}
impl<T> WithIndex<T> {
pub fn index_from(resp: &Response) -> Result<WithIndexBuilder<T>> {
let index = match resp.headers().get("X-Consul-Index") {
Some(v) => v.to_str()?.parse::<usize>()?,
None => bail!("X-Consul-Index header not found"),
};
Ok(WithIndexBuilder {
index,
_phantom: Default::default(),
})
}
pub fn into_inner(self) -> T {
self.value
}
pub fn index(&self) -> usize {
self.index
}
}
impl<T> std::convert::AsRef<T> for WithIndex<T> {
fn as_ref(&self) -> &T {
&self.value
}
}
impl<T> std::borrow::Borrow<T> for WithIndex<T> {
fn borrow(&self) -> &T {
&self.value
}
}
impl<T> std::ops::Deref for WithIndex<T> {
type Target = T;
fn deref(&self) -> &T {
&self.value
}
}
impl<T: Debug> Debug for WithIndex<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
<T as Debug>::fmt(self, f)
}
}
impl<T: Display> Display for WithIndex<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
<T as Display>::fmt(self, f)
}
}
pub struct WithIndexBuilder<T> {
_phantom: std::marker::PhantomData<T>,
index: usize,
}
impl<T> WithIndexBuilder<T> {
pub fn value(self, value: T) -> WithIndex<T> {
WithIndex {
value,
index: self.index,
}
}
}