use crate::{
CAARecord, DnsRecord, DnsRecordType, Error, IntoFqdn, KeyValue, MXRecord, SRVRecord,
http::{HttpClient, HttpClientBuilder},
utils::strip_origin_from_name,
};
use serde::{Deserialize, Serialize};
use std::{borrow::Cow, time::Duration};
const DEFAULT_API_ENDPOINT: &str = "https://api.vercel.com";
const LIST_PAGE_LIMIT: u32 = 100;
#[derive(Clone)]
pub struct VercelProvider {
client: HttpClient,
endpoint: Cow<'static, str>,
team_id: Option<String>,
}
#[derive(Deserialize, Debug)]
struct ListRecordsResponse {
records: Vec<ListedRecord>,
#[serde(default)]
pagination: Pagination,
}
#[derive(Deserialize, Debug, Default)]
struct Pagination {
#[serde(default)]
next: Option<u64>,
}
#[derive(Deserialize, Debug, Clone)]
struct ListedRecord {
id: String,
name: String,
#[serde(rename = "type")]
record_type: String,
#[serde(default)]
value: Option<String>,
#[serde(default, rename = "mxPriority")]
mx_priority: Option<u16>,
#[serde(default)]
srv: Option<SrvData>,
}
#[derive(Deserialize, Serialize, Debug, Clone, PartialEq, Eq)]
struct SrvData {
priority: u16,
weight: u16,
port: u16,
target: String,
}
#[derive(Debug, Clone, PartialEq, Eq)]
enum VercelContent {
Value(String),
Mx { value: String, priority: u16 },
Srv(SrvData),
}
#[derive(Serialize, Debug)]
struct CreateBody<'a> {
name: &'a str,
#[serde(rename = "type")]
record_type: &'static str,
#[serde(skip_serializing_if = "Option::is_none")]
value: Option<&'a str>,
ttl: u32,
#[serde(rename = "mxPriority", skip_serializing_if = "Option::is_none")]
mx_priority: Option<u16>,
#[serde(skip_serializing_if = "Option::is_none")]
srv: Option<&'a SrvData>,
}
impl VercelProvider {
pub(crate) fn new(
auth_token: impl AsRef<str>,
team_id: Option<impl AsRef<str>>,
timeout: Option<Duration>,
) -> Self {
let client = HttpClientBuilder::default()
.with_header("Authorization", format!("Bearer {}", auth_token.as_ref()))
.with_timeout(timeout)
.build();
Self {
client,
endpoint: Cow::Borrowed(DEFAULT_API_ENDPOINT),
team_id: team_id.map(|t| t.as_ref().to_string()),
}
}
#[cfg(test)]
pub(crate) fn with_endpoint(self, endpoint: impl Into<Cow<'static, str>>) -> Self {
Self {
endpoint: endpoint.into(),
..self
}
}
fn append_team_query(&self, mut url: String) -> String {
if let Some(team_id) = &self.team_id {
if url.contains('?') {
url.push('&');
} else {
url.push('?');
}
url.push_str("teamId=");
url.push_str(team_id);
}
url
}
pub(crate) async fn set_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
ttl: u32,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
let domain = origin.into_name().into_owned();
let name = name.into_name().into_owned();
let subdomain = strip_origin_from_name(&name, &domain, Some(""));
let desired = build_contents(record_type, records)?;
let existing = self.list_at(&domain, &subdomain, record_type).await?;
let mut existing_pool: Vec<(String, VercelContent)> = existing
.into_iter()
.filter_map(|r| {
let id = r.id.clone();
listed_to_content(&r, record_type).map(|c| (id, c))
})
.collect();
let mut to_add: Vec<VercelContent> = Vec::new();
for content in desired {
if let Some(idx) = existing_pool.iter().position(|(_, c)| *c == content) {
existing_pool.swap_remove(idx);
} else {
to_add.push(content);
}
}
for (id, _) in existing_pool {
self.delete_record(&domain, &id).await?;
}
for content in to_add {
self.create_record(&domain, &subdomain, record_type, ttl, &content)
.await?;
}
Ok(())
}
pub(crate) async fn add_to_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
ttl: u32,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
if records.is_empty() {
return Ok(());
}
let domain = origin.into_name().into_owned();
let name = name.into_name().into_owned();
let subdomain = strip_origin_from_name(&name, &domain, Some(""));
let desired = build_contents(record_type, records)?;
let existing = self.list_at(&domain, &subdomain, record_type).await?;
let mut effective: Vec<VercelContent> = existing
.iter()
.filter_map(|r| listed_to_content(r, record_type))
.collect();
for content in desired {
if effective.contains(&content) {
continue;
}
self.create_record(&domain, &subdomain, record_type, ttl, &content)
.await?;
effective.push(content);
}
Ok(())
}
pub(crate) async fn remove_from_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
records: Vec<DnsRecord>,
origin: impl IntoFqdn<'_>,
) -> crate::Result<()> {
if records.is_empty() {
return Ok(());
}
let domain = origin.into_name().into_owned();
let name = name.into_name().into_owned();
let subdomain = strip_origin_from_name(&name, &domain, Some(""));
let to_remove = build_contents(record_type, records)?;
let existing = self.list_at(&domain, &subdomain, record_type).await?;
let existing_pairs: Vec<(String, VercelContent)> = existing
.into_iter()
.filter_map(|r| {
let id = r.id.clone();
listed_to_content(&r, record_type).map(|c| (id, c))
})
.collect();
for content in to_remove {
if let Some((id, _)) = existing_pairs.iter().find(|(_, c)| *c == content) {
self.delete_record(&domain, id).await?;
}
}
Ok(())
}
pub(crate) async fn list_rrset(
&self,
name: impl IntoFqdn<'_>,
record_type: DnsRecordType,
origin: impl IntoFqdn<'_>,
) -> crate::Result<Vec<DnsRecord>> {
if record_type == DnsRecordType::TLSA {
return Err(Error::Unsupported(
"TLSA records are not supported by Vercel".to_string(),
));
}
let domain = origin.into_name().into_owned();
let name = name.into_name().into_owned();
let subdomain = strip_origin_from_name(&name, &domain, Some(""));
let listed = self.list_at(&domain, &subdomain, record_type).await?;
listed
.into_iter()
.map(|r| listed_to_dns_record(&r, record_type))
.collect()
}
async fn list_at(
&self,
domain: &str,
subdomain: &str,
record_type: DnsRecordType,
) -> crate::Result<Vec<ListedRecord>> {
let wanted_type = record_type.as_str();
let mut out: Vec<ListedRecord> = Vec::new();
let mut until: Option<u64> = None;
loop {
let mut url = format!(
"{}/v5/domains/{domain}/records?limit={LIST_PAGE_LIMIT}",
self.endpoint
);
if let Some(cursor) = until {
url.push_str("&until=");
url.push_str(&cursor.to_string());
}
url = self.append_team_query(url);
let response: ListRecordsResponse = self.client.get(url).send_with_retry(3).await?;
for record in response.records {
if record.name == subdomain && record.record_type == wanted_type {
out.push(record);
}
}
match response.pagination.next {
Some(cursor) => until = Some(cursor),
None => break,
}
}
Ok(out)
}
async fn create_record(
&self,
domain: &str,
subdomain: &str,
record_type: DnsRecordType,
ttl: u32,
content: &VercelContent,
) -> crate::Result<()> {
let body = build_create_body(subdomain, record_type, ttl, content);
let url = self.append_team_query(format!("{}/v2/domains/{domain}/records", self.endpoint));
self.client
.post(url)
.with_body(body)?
.send_with_retry::<serde_json::Value>(3)
.await
.map(|_| ())
}
async fn delete_record(&self, domain: &str, record_id: &str) -> crate::Result<()> {
let url = self.append_team_query(format!(
"{}/v2/domains/{domain}/records/{record_id}",
self.endpoint
));
self.client
.delete(url)
.send_with_retry::<serde_json::Value>(3)
.await
.map(|_| ())
}
}
fn build_create_body<'a>(
subdomain: &'a str,
record_type: DnsRecordType,
ttl: u32,
content: &'a VercelContent,
) -> CreateBody<'a> {
match content {
VercelContent::Value(value) => CreateBody {
name: subdomain,
record_type: record_type.as_str(),
value: Some(value.as_str()),
ttl,
mx_priority: None,
srv: None,
},
VercelContent::Mx { value, priority } => CreateBody {
name: subdomain,
record_type: record_type.as_str(),
value: Some(value.as_str()),
ttl,
mx_priority: Some(*priority),
srv: None,
},
VercelContent::Srv(data) => CreateBody {
name: subdomain,
record_type: record_type.as_str(),
value: None,
ttl,
mx_priority: None,
srv: Some(data),
},
}
}
fn build_contents(
expected_type: DnsRecordType,
records: Vec<DnsRecord>,
) -> crate::Result<Vec<VercelContent>> {
let mut out = Vec::with_capacity(records.len());
for record in records {
if record.as_type() != expected_type {
return Err(Error::Api(format!(
"RRSet record type mismatch: expected {}, got {}",
expected_type.as_str(),
record.as_type().as_str(),
)));
}
out.push(vercel_content_from_record(&record)?);
}
Ok(out)
}
fn vercel_content_from_record(record: &DnsRecord) -> crate::Result<VercelContent> {
Ok(match record {
DnsRecord::A(addr) => VercelContent::Value(addr.to_string()),
DnsRecord::AAAA(addr) => VercelContent::Value(addr.to_string()),
DnsRecord::CNAME(content) => VercelContent::Value(content.clone()),
DnsRecord::NS(content) => VercelContent::Value(content.clone()),
DnsRecord::MX(mx) => VercelContent::Mx {
value: mx.exchange.clone(),
priority: mx.priority,
},
DnsRecord::TXT(content) => VercelContent::Value(content.clone()),
DnsRecord::SRV(srv) => VercelContent::Srv(SrvData {
priority: srv.priority,
weight: srv.weight,
port: srv.port,
target: srv.target.clone(),
}),
DnsRecord::TLSA(_) => {
return Err(Error::Unsupported(
"TLSA records are not supported by Vercel".to_string(),
));
}
DnsRecord::CAA(caa) => VercelContent::Value(caa.to_string()),
})
}
fn listed_to_content(record: &ListedRecord, record_type: DnsRecordType) -> Option<VercelContent> {
match record_type {
DnsRecordType::MX => Some(VercelContent::Mx {
value: record.value.clone().unwrap_or_default(),
priority: record.mx_priority.unwrap_or(0),
}),
DnsRecordType::SRV => {
if let Some(srv) = &record.srv {
Some(VercelContent::Srv(srv.clone()))
} else {
parse_srv_value(record.value.as_deref()?).map(VercelContent::Srv)
}
}
DnsRecordType::TLSA => None,
_ => Some(VercelContent::Value(
record.value.clone().unwrap_or_default(),
)),
}
}
fn parse_srv_value(value: &str) -> Option<SrvData> {
let mut parts = value.split_whitespace();
let priority = parts.next()?.parse().ok()?;
let weight = parts.next()?.parse().ok()?;
let port = parts.next()?.parse().ok()?;
let target = parts.next()?.to_string();
if parts.next().is_some() {
return None;
}
Some(SrvData {
priority,
weight,
port,
target,
})
}
fn listed_to_dns_record(
record: &ListedRecord,
record_type: DnsRecordType,
) -> crate::Result<DnsRecord> {
match record_type {
DnsRecordType::A => {
let value = record.value.as_deref().unwrap_or("");
value
.parse()
.map(DnsRecord::A)
.map_err(|err| Error::Parse(format!("invalid A value {value}: {err}")))
}
DnsRecordType::AAAA => {
let value = record.value.as_deref().unwrap_or("");
value
.parse()
.map(DnsRecord::AAAA)
.map_err(|err| Error::Parse(format!("invalid AAAA value {value}: {err}")))
}
DnsRecordType::CNAME => Ok(DnsRecord::CNAME(record.value.clone().unwrap_or_default())),
DnsRecordType::NS => Ok(DnsRecord::NS(record.value.clone().unwrap_or_default())),
DnsRecordType::MX => Ok(DnsRecord::MX(MXRecord {
exchange: record.value.clone().unwrap_or_default(),
priority: record.mx_priority.unwrap_or(0),
})),
DnsRecordType::TXT => Ok(DnsRecord::TXT(record.value.clone().unwrap_or_default())),
DnsRecordType::SRV => {
let srv = record
.srv
.clone()
.or_else(|| parse_srv_value(record.value.as_deref()?))
.ok_or_else(|| {
Error::Parse(format!(
"invalid SRV record {}: missing srv data",
record.id
))
})?;
Ok(DnsRecord::SRV(SRVRecord {
priority: srv.priority,
weight: srv.weight,
port: srv.port,
target: srv.target,
}))
}
DnsRecordType::TLSA => Err(Error::Unsupported(
"TLSA records are not supported by Vercel".to_string(),
)),
DnsRecordType::CAA => parse_caa_value(record.value.as_deref().unwrap_or("")),
}
}
fn parse_caa_value(value: &str) -> crate::Result<DnsRecord> {
let mut parts = value.splitn(3, char::is_whitespace);
let flags_str = parts
.next()
.ok_or_else(|| Error::Parse(format!("invalid CAA value: {value}")))?;
let tag = parts
.next()
.ok_or_else(|| Error::Parse(format!("invalid CAA value: {value}")))?;
let raw_value = parts.next().unwrap_or("");
let flags: u8 = flags_str
.parse()
.map_err(|err| Error::Parse(format!("invalid CAA flags {flags_str}: {err}")))?;
let issuer_critical = flags & 0x80 != 0;
let stripped = raw_value
.trim()
.trim_start_matches('"')
.trim_end_matches('"');
Ok(DnsRecord::CAA(match tag {
"issue" => {
let (name, options) = split_caa_value(stripped);
CAARecord::Issue {
issuer_critical,
name,
options,
}
}
"issuewild" => {
let (name, options) = split_caa_value(stripped);
CAARecord::IssueWild {
issuer_critical,
name,
options,
}
}
"iodef" => CAARecord::Iodef {
issuer_critical,
url: stripped.to_string(),
},
other => return Err(Error::Parse(format!("unknown CAA tag: {other}"))),
}))
}
fn split_caa_value(value: &str) -> (Option<String>, Vec<KeyValue>) {
let mut parts = value.split(';').map(str::trim);
let name_part = parts.next().unwrap_or("").trim().to_string();
let name = if name_part.is_empty() {
None
} else {
Some(name_part)
};
let options = parts
.filter(|p| !p.is_empty())
.map(|p| match p.split_once('=') {
Some((k, v)) => KeyValue {
key: k.trim().to_string(),
value: v.trim().to_string(),
},
None => KeyValue {
key: p.trim().to_string(),
value: String::new(),
},
})
.collect();
(name, options)
}