dns-over-http-resolver - npm Package Compare versions

Comparing version 1.0.0 to 1.1.0

CHANGELOG.md

@@ -0,1 +1,11 @@
+<a name="1.1.0"></a>
+# [1.1.0](https://github.com/vasco-santos/dns-over-http-resolver/compare/v1.0.0...v1.1.0) (2020-11-05)
+
+
+### Features
+
+* cache ([2a2aa61](https://github.com/vasco-santos/dns-over-http-resolver/commit/2a2aa61))
+
+
+
 <a name="1.0.0"></a>
@@ -2,0 +12,0 @@ # 1.0.0 (2020-10-13)

dist/index.min.js

@@ -1,1 +0,1 @@
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package.json

 {
   "name": "dns-over-http-resolver",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "DNS over HTTP resolver",
@@ -42,3 +42,4 @@ "main": "src/index.js",
     "debug": "^4.2.0",
-    "native-fetch": "^2.0.1"
+    "native-fetch": "^2.0.1",
+    "receptacle": "^1.3.2"
   },
@@ -45,0 +46,0 @@ "contributors": [

README.md

@@ -23,8 +23,18 @@ # dns-over-http-resolver
 const DnsOverHttpResolver = require('dns-over-http-resolver')
+
+const dohResolver = new DnsOverHttpResolver(options)
 ```
 
+[Cloudflare](https://cloudflare-dns.com/dns-query) and [Google](https://dns.google/resolve) DNS servers are used by default. They can be replaced via the API. 
+
 You can also use `require('dns').promises` in Node.js in lieu of this module.
 
-[Cloudflare](https://cloudflare-dns.com/dns-query) and [Google](https://dns.google/resolve) DNS servers are used by default. They can be replaced via the API. 
+### options
 
+You can provide the following options for the DnsOverHttpResolver:
+
+| Name | Type | Description | Default |
+|------|------|-------------|---------|
+| maxCache | `number` | maximum number of cached dns records | 100 |
+
 ## API
@@ -31,0 +41,0 @@

src/index.js

@@ -6,4 +6,10 @@ 'use strict'
 
-const { buildResource, fetch } = require('./utils')
+const Receptacle = require('receptacle')
 
+const {
+  buildResource,
+  fetch,
+  getCacheKey
+} = require('./utils')
+
 /**
@@ -16,4 +22,7 @@ * DNS over HTTP resolver.
    * @class
+   * @param {object} [properties]
+   * @param {number} [properties.maxCache = 100] - maximum number of cached dns records.
    */
-  constructor () {
+  constructor ({ maxCache = 100 } = {}) {
+    this._cache = new Receptacle({ max: maxCache })
     this._servers = [
@@ -71,2 +80,8 @@ 'https://cloudflare-dns.com/dns-query',
   async resolve4 (hostname) {
+    const recordType = 'A'
+    const cached = this._cache.get(getCacheKey(hostname, recordType))
+    if (cached) {
+      return cached
+    }
+
     for (const server of this._servers) {
@@ -77,13 +92,18 @@ try {
           hostname,
-          recordType: 'A'
+          recordType
         }))
 
         const d = await response.json()
-        return d.Answer.map(a => a.data)
+        const data = d.Answer.map(a => a.data)
+        const ttl = Math.min(d.Answer.map(a => a.TTL))
+
+        this._cache.set(getCacheKey(hostname, recordType), data, { ttl })
+
+        return data
       } catch (err) {
-        log.error(`${server} could not resolve ${hostname} record A`)
+        log.error(`${server} could not resolve ${hostname} record ${recordType}`)
       }
     }
 
-    throw new Error(`Could not resolve ${hostname} record A`)
+    throw new Error(`Could not resolve ${hostname} record ${recordType}`)
   }
@@ -98,2 +118,8 @@
   async resolve6 (hostname) {
+    const recordType = 'AAAA'
+    const cached = this._cache.get(getCacheKey(hostname, recordType))
+    if (cached) {
+      return cached
+    }
+
     for (const server of this._servers) {
@@ -104,13 +130,18 @@ try {
           hostname,
-          recordType: 'AAAA'
+          recordType
         }))
 
         const d = await response.json()
-        return d.Answer.map(a => a.data)
+        const data = d.Answer.map(a => a.data)
+        const ttl = Math.min(d.Answer.map(a => a.TTL))
+
+        this._cache.set(getCacheKey(hostname, recordType), data, { ttl })
+
+        return data
       } catch (err) {
-        log.error(`${server} could not resolve ${hostname} record AAAA`)
+        log.error(`${server} could not resolve ${hostname} record ${recordType}`)
       }
     }
 
-    throw new Error(`Could not resolve ${hostname} record AAAA`)
+    throw new Error(`Could not resolve ${hostname} record ${recordType}`)
   }
@@ -125,2 +156,8 @@
   async resolveTxt (hostname) {
+    const recordType = 'TXT'
+    const cached = this._cache.get(getCacheKey(hostname, recordType))
+    if (cached) {
+      return cached
+    }
+
     for (const server of this._servers) {
@@ -131,14 +168,18 @@ try {
           hostname,
-          recordType: 'TXT'
+          recordType
         }))
 
         const d = await response.json()
+        const data = d.Answer.map(a => [a.data.replace(/['"]+/g, '')])
+        const ttl = Math.min(d.Answer.map(a => a.TTL))
 
-        return d.Answer.map(a => [a.data.replace(/['"]+/g, '')])
+        this._cache.set(getCacheKey(hostname, recordType), data, { ttl })
+
+        return data
       } catch (err) {
-        log.error(`${server} could not resolve ${hostname} record TXT`)
+        log.error(`${server} could not resolve ${hostname} record ${recordType}`)
       }
     }
 
-    throw new Error(`Could not resolve ${hostname} record TXT`)
+    throw new Error(`Could not resolve ${hostname} record ${recordType}`)
   }
@@ -145,0 +186,0 @@ }

src/utils.js

@@ -20,2 +20,8 @@ 'use strict'
 
+/**
+ * Use fetch to find the record.
+ *
+ * @param {object} resource
+ * @returns {Promise}
+ */
 function fetch (resource) {
@@ -30,1 +36,14 @@ return nativeFetch(resource, {
 module.exports.fetch = fetch
+
+/**
+ * Creates cache key composed by recordType and hostname.
+ *
+ * @param {string} hostname
+ * @param {string} recordType
+ * @returns {string}
+ */
+function getCacheKey (hostname, recordType) {
+  return `${recordType}_${hostname}`
+}
+
+module.exports.getCacheKey = getCacheKey

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

30960

increased by17.59%

Lines of code

196

increased by33.33%

Number of lines in readme file

197

increased by5.35%

Worsened metrics

Dependency count

3

increased by50%

Number of medium supply chain risk alerts

5

increased by25%

Dependency changes

• + Addedreceptacle@^1.3.2

• + Addedreceptacle@1.3.2(transitive)