add retries and error handling

.github/workflows/workflow.yml

@@ -9,12 +9,12 @@ jobs:
         operating-system: [ubuntu-latest, windows-latest]
     steps:
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@v2
 
-    - name: Set Node.js 10.x
-      uses: actions/setup-node@master
+    - name: Setup Node.js 12.x
+      uses: actions/setup-node@v1
       with:
-        node-version: 10.x
+        node-version: 12.x
 
     - name: npm install
       run: npm install
@@ -40,12 +40,12 @@ jobs:
       run: |
         echo "127.0.0.0 registry.npm.js nodejs.org github.com api.github.com download.java.net static.azul.com" | sudo tee -a /etc/hosts
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@v2
 
-    - name: Set Node.js 10.x
-      uses: actions/setup-node@master
+    - name: Setup Node.js 12.x
+      uses: actions/setup-node@v1
       with:
-        node-version: 10.x
+        node-version: 12.x
 
     - name: npm install
       run: npm install

src/installer.ts

@@ -39,15 +39,28 @@ export async function getJava(
   } else {
     let compressedFileExtension = '';
     if (!jdkFile) {
-      core.debug('Downloading Jdk from Azul');
-      let http: httpm.HttpClient = new httpm.HttpClient('setup-java');
-      let contents = await (
-        await http.get('https://static.azul.com/zulu/bin/')
-      ).readBody();
-      let refs = contents.match(/<a href.*\">/gi) || [];
+      core.debug('Downloading JDK from Azul');
+      const http = new httpm.HttpClient('setup-java', undefined, {
+        allowRetries: true,
+        maxRetries: 3
+      });
+      const url = 'https://static.azul.com/zulu/bin/';
+      const response = await http.get(url);
+      const statusCode = response.message.statusCode || 0;
+      if (statusCode < 200 || statusCode > 299) {
+        let body = '';
+        try {
+          body = await response.readBody();
+        } catch (err) {
+          core.debug(`Unable to read body: ${err.message}`);
+        }
+        const message = `Unexpected HTTP status code '${response.message.statusCode}' when retrieving versions from '${url}'. ${body}`.trim();
+        throw new Error(message);
+      }
 
+      const contents = await response.readBody();
+      const refs = contents.match(/<a href.*\">/gi) || [];
       const downloadInfo = getDownloadInfo(refs, version, javaPackage);
-
       jdkFile = await tc.downloadTool(downloadInfo.url);
       version = downloadInfo.version;
       compressedFileExtension = IS_WINDOWS ? '.zip' : '.tar.gz';