Add Azure Blob Storage support

Signed-off-by: Adam Hoka <hoka.adam@nexogen.hu>

8 files changed, 60 insertions, 6 deletions

diff --git a/README.md b/README.md
index f302802c..ba041825 100644
--- a/README.md
+++ b/README.md
@@ -212,6 +212,8 @@ There are some config settings you need to change in the files below.
 | `HMD_MINIO_ENDPOINT` | `minio.example.org` | Address of your Minio endpoint/instance |
 | `HMD_MINIO_PORT` | `9000` | Port that is used for your Minio instance |
 | `HMD_MINIO_SECURE` | `true` | If set to `true` HTTPS is used for Minio |
+| `HMD_AZURE_CONNECTION_STRING` | no example | Azure Blob Storage connection string |
+| `HMD_AZURE_CONTAINER` | no example | Azure Blob Storage container name (automatically created if non existent) |
 | `HMD_HSTS_ENABLE` | ` true`  | set to enable [HSTS](https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security) if HTTPS is also enabled (default is ` true`) |
 | `HMD_HSTS_INCLUDE_SUBDOMAINS` | `true` | set to include subdomains in HSTS (default is `true`) |
 | `HMD_HSTS_MAX_AGE` | `31536000` | max duration in seconds to tell clients to keep HSTS status (default is a year) |
@@ -261,7 +263,7 @@ There are some config settings you need to change in the files below.
 | `documentMaxLength` | `100000` | note max length |
 | `email` | `true` or `false` | set to allow email signin |
 | `allowEmailRegister`  | `true` or `false` | set to allow email register (only applied when email is set, default is `true`. Note `bin/manage_users` might help you if registration is `false`.) |
-| `imageUploadType` | `imgur`(default), `s3`, `minio` or `filesystem` | Where to upload image
+| `imageUploadType` | `imgur`(default), `s3`, `minio`, `azure` or `filesystem` | Where to upload image
 | `minio` | `{ "accessKey": "YOUR_MINIO_ACCESS_KEY", "secretKey": "YOUR_MINIO_SECRET_KEY", "endpoint": "YOUR_MINIO_HOST", port: 9000, secure: true }` | When `imageUploadType` is set to `minio`, you need to set this key. Also checkout our [Minio Image Upload Guide](docs/guides/minio-image-upload.md) |
 | `s3` | `{ "accessKeyId": "YOUR_S3_ACCESS_KEY_ID", "secretAccessKey": "YOUR_S3_ACCESS_KEY", "region": "YOUR_S3_REGION" }` | When `imageuploadtype` be set to `s3`, you would also need to setup this key, check our [S3 Image Upload Guide](docs/guides/s3-image-upload.md) |
 | `s3bucket` | `YOUR_S3_BUCKET_NAME` | bucket name when `imageUploadType` is set to `s3` or `minio` |
@@ -271,7 +273,7 @@ There are some config settings you need to change in the files below.
 | service | settings location | description |
 | ------- | --------- | ----------- |
 | facebook, twitter, github, gitlab, mattermost, dropbox, google, ldap, saml | environment variables or `config.json` | for signin |
-| imgur, s3, minio | environment variables or `config.json` | for image upload |
+| imgur, s3, minio, azure | environment variables or `config.json` | for image upload |
 | dropbox(`dropbox/appKey`) | `config.json` | for export and import |
 
 ## Third-party integration OAuth callback URLs
diff --git a/config.json.example b/config.json.example
index 6cd55efb..e07052bd 100644
--- a/config.json.example
+++ b/config.json.example
@@ -114,6 +114,11 @@
           "secretAccessKey": "change this",
           "region": "change this"
         },
-        "s3bucket": "change this"
+        "s3bucket": "change this",
+        "azure":
+        {
+          "connectionString": "change this",
+          "container": "change this"
+        }
     }
 }
diff --git a/lib/config/default.js b/lib/config/default.js
index 68849d36..30ce2090 100644
--- a/lib/config/default.js
+++ b/lib/config/default.js
@@ -56,7 +56,7 @@ module.exports = {
   heartbeatTimeout: 10000,
   // document
   documentMaxLength: 100000,
-  // image upload setting, available options are imgur/s3/filesystem
+  // image upload setting, available options are imgur/s3/filesystem/azure
   imageUploadType: 'filesystem',
   imgur: {
     clientID: undefined
@@ -74,6 +74,10 @@ module.exports = {
     port: 9000
   },
   s3bucket: undefined,
+  azure: {
+    connectionString: undefined,
+    container: undefined
+  },
   // authentication
   facebook: {
     clientID: undefined,
diff --git a/lib/config/dockerSecret.js b/lib/config/dockerSecret.js
index b9116cd3..fd66ddfe 100644
--- a/lib/config/dockerSecret.js
+++ b/lib/config/dockerSecret.js
@@ -22,6 +22,9 @@ if (fs.existsSync(basePath)) {
       accessKeyId: getSecret('s3_acccessKeyId'),
       secretAccessKey: getSecret('s3_secretAccessKey')
     },
+    azure: {
+      connectionString: getSecret('azure_connectionString')
+    },
     facebook: {
       clientID: getSecret('facebook_clientID'),
       clientSecret: getSecret('facebook_clientSecret')
diff --git a/lib/config/environment.js b/lib/config/environment.js
index 3dde4786..810cb225 100644
--- a/lib/config/environment.js
+++ b/lib/config/environment.js
@@ -45,6 +45,10 @@ module.exports = {
     port: toIntegerConfig(process.env.HMD_MINIO_PORT)
   },
   s3bucket: process.env.HMD_S3_BUCKET,
+  azure: {
+    connectionString: process.env.HMD_AZURE_CONNECTION_STRING,
+    container: process.env.HMD_AZURE_CONTAINER
+  },
   facebook: {
     clientID: process.env.HMD_FACEBOOK_CLIENTID,
     clientSecret: process.env.HMD_FACEBOOK_CLIENTSECRET
diff --git a/lib/config/index.js b/lib/config/index.js
index bdba5e0e..f10eadb8 100644
--- a/lib/config/index.js
+++ b/lib/config/index.js
@@ -127,8 +127,8 @@ if (config.sessionSecret === 'secret') {
 }
 
 // Validate upload upload providers
-if (['filesystem', 's3', 'minio', 'imgur'].indexOf(config.imageUploadType) === -1) {
-  logger.error('"imageuploadtype" is not correctly set. Please use "filesystem", "s3", "minio" or "imgur". Defaulting to "imgur"')
+if (['filesystem', 's3', 'minio', 'imgur', 'azure'].indexOf(config.imageUploadType) === -1) {
+  logger.error('"imageuploadtype" is not correctly set. Please use "filesystem", "s3", "minio", "azure" or "imgur". Defaulting to "imgur"')
   config.imageUploadType = 'imgur'
 }
 
diff --git a/lib/web/imageRouter/azure.js b/lib/web/imageRouter/azure.js
new file mode 100644
index 00000000..cc98e5fc
--- /dev/null
+++ b/lib/web/imageRouter/azure.js
@@ -0,0 +1,35 @@
+'use strict'
+const path = require('path')
+
+const config = require('../../config')
+const logger = require('../../logger')
+
+const azure = require('azure-storage')
+
+exports.uploadImage = function (imagePath, callback) {
+  if (!imagePath || typeof imagePath !== 'string') {
+    callback(new Error('Image path is missing or wrong'), null)
+    return
+  }
+
+  if (!callback || typeof callback !== 'function') {
+    logger.error('Callback has to be a function')
+    return
+  }
+
+  var azureBlobService = azure.createBlobService(config.azure.connectionString)
+
+  azureBlobService.createContainerIfNotExists(config.azure.container, { publicAccessLevel: 'blob' }, function (err, result, response) {
+    if (err) {
+      callback(new Error(err.message), null)
+    } else {
+      azureBlobService.createBlockBlobFromLocalFile(config.azure.container, path.basename(imagePath), imagePath, function (err, result, response) {
+        if (err) {
+          callback(new Error(err.message), null)
+        } else {
+          callback(null, azureBlobService.getUrl(config.azure.container, result.name))
+        }
+      })
+    }
+  })
+}
diff --git a/package.json b/package.json
index c31b3c8a..b7420ceb 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "async": "^2.1.4",
     "aws-sdk": "^2.7.20",
     "base64url": "^3.0.0",
+    "azure-storage": "^2.7.0",
     "blueimp-md5": "^2.6.0",
     "body-parser": "^1.15.2",
     "bootstrap": "^3.3.7",