barebones webhook for docker hub automated builds

Author: maxbeatty

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

.eslintrc

@@ -0,0 +1,3 @@
+{
+  "extends": "semistandard"
+}

.gitignore

@@ -1,29 +1,4 @@
-# Logs
-logs
-*.log
 npm-debug.log*
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
-# Dependency directory
 node_modules
 
 # Optional npm cache directory

.nvmrc

@@ -0,0 +1 @@
+v4.3.1

.travis.yml

@@ -0,0 +1 @@
+language: node_js

README.md

@@ -1,2 +1,19 @@
 # docker-hub-hook
 Webhook for Docker Hub Automated Builds
+
+## Environment Variables
+
+- **DHH_PORT** - port for HTTP server to listen on
+- **DHH_CMD** - command to execute
+- **DHH_CWD** - current working directory for command
+- **DHH_TOKEN** - secret for simple auth
+- **DHH_REPO** - repository name on Docker Hub
+- **DHH_TAG** - tag for repository on Docker Hub
+
+```
+DHH_PORT=4321 DHH_CMD='ls -al' DHH_CWD='/home/' DHH_TOKEN=abc123 DHH_TAG node index.js
+```
+
+```
+curl -H "Content-Type: application/json" -X POST -d '{"push_data": { "tag": "master" }, "repository": { "repo_name": "jsperf/jsperf.com"}, "callback_url": "https://www.google.com/"}' http://127.0.0.1:4321/hook?token=abc123
+```

index.js

@@ -0,0 +1,86 @@
+const http = require('http');
+const https = require('https');
+const url = require('url');
+const cp = require('child_process');
+
+function reply (res, code) {
+  res.writeHead(code);
+  res.end(http.STATUS_CODES[code]);
+}
+
+function validate (u, state, cb) {
+  console.log('validating webhook...');
+  const cbUrl = url.parse(u);
+
+  const req = https.request({
+    method: 'POST',
+    hostname: cbUrl.hostname,
+    path: cbUrl.path
+  }, (res) => {
+    cb(null, res.statusCode);
+  });
+
+  req.on('error', cb);
+
+  req.write(JSON.stringify({ state: state }));
+  req.end();
+}
+
+http.createServer(function (req, res) {
+  if (req.method === 'POST') {
+    const parsedUrl = url.parse(req.url, true);
+
+    if (parsedUrl.pathname === '/hook' && parsedUrl.query.token === process.env.DHH_TOKEN) {
+      var body = '';
+
+      req.on('data', (chunk) => {
+        body += chunk;
+      });
+
+      req.on('end', () => {
+        try {
+          const payload = JSON.parse(body);
+          if (payload.repository.repo_name === process.env.DHH_REPO && payload.push_data.tag === process.env.DHH_TAG) {
+            console.log('executing command...');
+            cp.exec(process.env.DHH_CMD, {
+              cwd: process.env.DHH_CWD
+            }, function (err, stdout, stderr) {
+              var state = 'success';
+              var code = 200;
+
+              if (err) {
+                console.error(err);
+                state = 'failure';
+                code = 500;
+              } else {
+                console.log(stdout);
+                console.log(stderr);
+              }
+
+              validate(payload.callback_url, state, (err, statusCode) => {
+                if (err) {
+                  console.error(err);
+                }
+                console.log(`webhook callback response: ${statusCode}`);
+                reply(res, code);
+              });
+            });
+          } else {
+            throw new Error('Mismatched repo or tag in payload');
+          }
+        } catch (e) {
+          console.error(e);
+          reply(res, 400);
+        }
+      });
+    } else {
+      console.log(`Ignoring ${req.method} ${req.url}`);
+      reply(res, 404);
+    }
+  } else {
+    console.log(`Ignoring ${req.method} ${req.url}`);
+    reply(res, 404);
+  }
+}).listen(process.env.DHH_PORT, () => {
+  console.log('Server listening...');
+});

package.json

@@ -0,0 +1,29 @@
+{
+  "name": "docker-hub-hook",
+  "version": "1.0.0",
+  "description": "Webhook for Docker Hub Automated Builds",
+  "main": "index.js",
+  "scripts": {
+    "test": "eslint ."
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jsperf/docker-hub-hook.git"
+  },
+  "keywords": [
+    "jsperf",
+    "docker"
+  ],
+  "author": "Max Beatty",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/jsperf/docker-hub-hook/issues"
+  },
+  "homepage": "https://github.com/jsperf/docker-hub-hook#readme",
+  "devDependencies": {
+    "eslint": "1.10.3",
+    "eslint-config-semistandard": "5.0.0",
+    "eslint-config-standard": "4.4.0",
+    "eslint-plugin-standard": "1.3.2"
+  }
+}