Add S3-compatible service detection for Linode and DigitalOcean

Fixes automatic service parameter detection for S3-compatible object storage providers:
- Linode Object Storage (*.linodeobjects.com)
- DigitalOcean Spaces (*.digitaloceanspaces.com)

Previously, these endpoints required manually specifying service=s3 in the aws options,
causing authorization errors when the service parameter was incorrectly guessed. Now the
library automatically detects these endpoints and sets service=s3 with the correct region.

Follows existing pattern used for Cloudflare R2 and Backblaze B2 detection.

Evidence:
- Linode issue: twilligon/git-lfs-s3-proxy#10
- DigitalOcean issue: #15

Added test coverage for both providers with virtual-host and path-style URLs.

Author: twilligon

dist/aws4fetch.cjs.js

@@ -259,6 +259,14 @@ function guessServiceRegion(url, headers) {
     const match = hostname.match(/^(?:[^.]{1,63}\.)?s3\.([^.]{1,63})\.backblazeb2\.com$/);
     return match != null ? ['s3', match[1] || ''] : ['', '']
   }
+  if (hostname.endsWith('.linodeobjects.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.linodeobjects\.com$/);
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
+  if (hostname.endsWith('.digitaloceanspaces.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.digitaloceanspaces\.com$/);
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
   const match = hostname.replace('dualstack.', '').match(/([^.]{1,63})\.(?:([^.]{0,63})\.)?amazonaws\.com(?:\.cn)?$/);
   let service = (match && match[1]) || '';
   let region = match && match[2];

dist/aws4fetch.esm.js

@@ -255,6 +255,14 @@ function guessServiceRegion(url, headers) {
     const match = hostname.match(/^(?:[^.]{1,63}\.)?s3\.([^.]{1,63})\.backblazeb2\.com$/);
     return match != null ? ['s3', match[1] || ''] : ['', '']
   }
+  if (hostname.endsWith('.linodeobjects.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.linodeobjects\.com$/);
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
+  if (hostname.endsWith('.digitaloceanspaces.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.digitaloceanspaces\.com$/);
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
   const match = hostname.replace('dualstack.', '').match(/([^.]{1,63})\.(?:([^.]{0,63})\.)?amazonaws\.com(?:\.cn)?$/);
   let service = (match && match[1]) || '';
   let region = match && match[2];

dist/aws4fetch.esm.mjs

@@ -255,6 +255,14 @@ function guessServiceRegion(url, headers) {
     const match = hostname.match(/^(?:[^.]{1,63}\.)?s3\.([^.]{1,63})\.backblazeb2\.com$/);
     return match != null ? ['s3', match[1] || ''] : ['', '']
   }
+  if (hostname.endsWith('.linodeobjects.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.linodeobjects\.com$/);
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
+  if (hostname.endsWith('.digitaloceanspaces.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.digitaloceanspaces\.com$/);
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
   const match = hostname.replace('dualstack.', '').match(/([^.]{1,63})\.(?:([^.]{0,63})\.)?amazonaws\.com(?:\.cn)?$/);
   let service = (match && match[1]) || '';
   let region = match && match[2];

dist/aws4fetch.umd.js

@@ -261,6 +261,14 @@
       const match = hostname.match(/^(?:[^.]{1,63}\.)?s3\.([^.]{1,63})\.backblazeb2\.com$/);
       return match != null ? ['s3', match[1] || ''] : ['', '']
     }
+    if (hostname.endsWith('.linodeobjects.com')) {
+      const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.linodeobjects\.com$/);
+      return match != null ? ['s3', match[1] || ''] : ['', '']
+    }
+    if (hostname.endsWith('.digitaloceanspaces.com')) {
+      const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.digitaloceanspaces\.com$/);
+      return match != null ? ['s3', match[1] || ''] : ['', '']
+    }
     const match = hostname.replace('dualstack.', '').match(/([^.]{1,63})\.(?:([^.]{0,63})\.)?amazonaws\.com(?:\.cn)?$/);
     let service = (match && match[1]) || '';
     let region = match && match[2];

dist/main.d.mts

@@ -33,7 +33,7 @@ export class AwsClient {
             allHeaders?: boolean;
             singleEncode?: boolean;
         };
-    }) | null | undefined): Promise<Request>;
+    }) | null): Promise<Request>;
     fetch(input: Request | {
         toString: () => string;
     }, init?: (RequestInit & {
@@ -50,7 +50,7 @@ export class AwsClient {
             allHeaders?: boolean;
             singleEncode?: boolean;
         };
-    }) | null | undefined): Promise<Response>;
+    }) | null): Promise<Response>;
 }
 export class AwsV4Signer {
     constructor({ method, url, headers, body, accessKeyId, secretAccessKey, sessionToken, service, region, cache, datetime, signQuery, appendSessionToken, allHeaders, singleEncode }: {

dist/main.d.ts

@@ -33,7 +33,7 @@ export class AwsClient {
             allHeaders?: boolean;
             singleEncode?: boolean;
         };
-    }) | null | undefined): Promise<Request>;
+    }) | null): Promise<Request>;
     fetch(input: Request | {
         toString: () => string;
     }, init?: (RequestInit & {
@@ -50,7 +50,7 @@ export class AwsClient {
             allHeaders?: boolean;
             singleEncode?: boolean;
         };
-    }) | null | undefined): Promise<Response>;
+    }) | null): Promise<Response>;
 }
 export class AwsV4Signer {
     constructor({ method, url, headers, body, accessKeyId, secretAccessKey, sessionToken, service, region, cache, datetime, signQuery, appendSessionToken, allHeaders, singleEncode }: {

src/main.js

@@ -404,6 +404,14 @@ function guessServiceRegion(url, headers) {
     const match = hostname.match(/^(?:[^.]{1,63}\.)?s3\.([^.]{1,63})\.backblazeb2\.com$/)
     return match != null ? ['s3', match[1] || ''] : ['', '']
   }
+  if (hostname.endsWith('.linodeobjects.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.linodeobjects\.com$/)
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
+  if (hostname.endsWith('.digitaloceanspaces.com')) {
+    const match = hostname.match(/^(?:[^.]{1,63}\.)?([^.]{1,63})\.digitaloceanspaces\.com$/)
+    return match != null ? ['s3', match[1] || ''] : ['', '']
+  }
   const match = hostname.replace('dualstack.', '').match(/([^.]{1,63})\.(?:([^.]{0,63})\.)?amazonaws\.com(?:\.cn)?$/)
   let service = (match && match[1]) || ''
   let region = match && match[2]

test/serviceTests.js

@@ -1,4 +1,4 @@
-import { AwsV4Signer } from '../src/main'
+import { AwsV4Signer } from '../src/main.js'
 
 export default async() => {
   fixtures().forEach(({ url, service, region }) => {
@@ -77,6 +77,10 @@ aa-custom-bucket.s3.us-west-001.backblazeb2.com,s3,us-west-001
 s3.us-west-001.backblazeb2.com,s3,us-west-001
 12345678.r2.cloudflarestorage.com,s3,auto
 aa-custom-bucket.12345678.r2.cloudflarestorage.com,s3,auto
+my-repo.us-sea-1.linodeobjects.com,s3,us-sea-1
+us-sea-1.linodeobjects.com,s3,us-sea-1
+my-space.nyc3.digitaloceanspaces.com,s3,nyc3
+nyc3.digitaloceanspaces.com,s3,nyc3
 ibvt72cx3dkyksnw7jktvkwhme0legmv.lambda-url.us-east-1.on.aws,lambda,us-east-1
   `
   return csv.trim().split('\n').map(line => {