Allowing complete control of the axios instance at the request level (so we can use any axios feature)

.eslintrc.js

@@ -18,6 +18,7 @@ module.exports = {
         ]
     },
     "env": {
+        es6: true,
         "node": true
     },
     "extends": "eslint:recommended"

README.md

@@ -1,39 +1,23 @@
-### Backblaze B2 Node.js Library
+# Backblaze B2 Node.js Library
+
 [![npm version](https://badge.fury.io/js/backblaze-b2.svg)](https://badge.fury.io/js/backblaze-b2) [![Build Status](https://travis-ci.org/yakovkhalinsky/backblaze-b2.svg?branch=master)](https://travis-ci.org/yakovkhalinsky/backblaze-b2)
 
+A customizable B2 client for Node.js:
+
+* Uses [axios](https://github.com/axios/axios). You can control the axios instance at the request level (see `axios` and `axiosOverride` config arguments) and at the global level (see `axios` config argument at instantiation) so you can use any axios feature.
+* Automatically retries on request failure. You can control retry behaviour using the `retries` argument at instantiation.
+
+## Usage
+
 This library uses promises, so all actions on a `B2` instance return a promise in the following pattern:
+
 ``` javascript
 b2.instanceFunction(arg1, arg2).then(
     successFn(response) { ... },
     errorFn(err) { ... }
 );
 ```
 
-### Status of project
-
-See the [CHANGELOG](https://github.com/yakovkhalinsky/backblaze-b2/blob/master/CHANGELOG.md) for a history of updates.
-
-### Contributing
-
-Contributions, suggestions, and questions are welcome. Please review the [contributing guidelines](CONTRIBUTING.md) for details.
-
-### Upgrading from 0.9.x to 1.0.x
-
-For this update, we've switched the back end HTTP request library from `request` to `axios` as it has better Promise and progress support built in. However, there are a couple changes that will break your code and ruin your day. Here are the changes:
-* The Promise resolution has a different data structure. Where previously, the request response data was the root object in the promise resolution (`res`), this data now resides in `res.data`.
-* In v0.9.12, we added request progress reporting via the third parameter to `then()`. Because we are no longer using the same promise library, this functionality has been removed. However, progress reporting is still available by passing a callback function into the `b2.method()` that you're calling. See the documentation below for details.
-* In v0.9.x, `b2.downloadFileById()` accepted a `fileId` parameter as a String or Number. As of 1.0.0, the first parameter is now expected to be a plain Object of arguments.
-
-### Response Object
-
-Each request returns an object with:
-- `status` - int, html error Status
-- `statusText`
-- `headers`
-- `config`
-- `request`
-- `data` - actual returned data from backblaze, https://www.backblaze.com/b2/docs/calling.html
-
 ### Basic Example
 
 ```javascript
@@ -47,49 +31,34 @@ const b2 = new B2({
 async function GetBucket() {
   try {
     await b2.authorize(); // must authorize first
-    let response = await b2.getBucket({bucketName: 'my-bucket'});
+    let response = await b2.getBucket({ bucketName: 'my-bucket' });
     console.log(response.data);
   } catch (err) {
     console.log('Error getting bucket:', err);
   }
 }
 ```
 
-### Uploading Large Files
-
-To upload large files, you need to split the file into parts (between 5MB and 5GB) and upload each part seperately.
+### Response Object
 
-First, you initiate the large file upload to get the fileId:
-```javascript
-let response = await b2.startLargeFile({bucketId, fileName});
-let fileId = response.data.fileId;
-```
+Each request returns an object with:
 
-Then for each part you request an `uploadUrl`, and use the response to upload the part:
-```javascript
-let response = await b2.getUploadPartUrl({fileId});
+* `status` - int, html error Status
+* `statusText`
+* `headers`
+* `config`
+* `request`
+* `data` - actual returned data from backblaze, https://www.backblaze.com/b2/docs/calling.html
 
-let uploadURL = response.data.uploadUrl;
-let authToken = response.data.authorizationToken;
+### How it works
 
-response = await b2.uploadPart({
-    partNumber: parNum,
-    uploadUrl: uploadURL,
-    uploadAuthToken: authToken,
-    data: buf
-});
-// status checks etc.
-```
+Each action (see reference below) takes arguments and constructs an axios request. You can add additional axios options at the request level using:
 
-Then finish the uploadUrl:
-```javascript
-let response = await b2.finishLargeFile({
-    fileId,
-    partSha1Array: parts.map(buf => sha1(buf))
-})
-```
+* The `axios` argument (object): each property in this object is added to the axios request object *only if it does not conflict* with an existing property.
+* The `axiosOverride` argument (object): each property in this object is added to the axios request object by *overriding* conflicting properties, if any. Don't use this unless you know what you're doing!
+* Both `axios` and `axiosOverride` work by recursively merging properties, so if you pass ```axios: { headers: { 'your-custom-header': 'header-value' } }```, the entire headers object will not be overridden - each header property (`your-custom-header`) will be compared.
 
-### Usage
+### Reference
 
 ```javascript
 const B2 = require('backblaze-b2');
@@ -100,35 +69,70 @@ const B2 = require('backblaze-b2');
 // create B2 object instance
 const b2 = new B2({
     accountId: 'applicationKeyId', // or accountId
-    applicationKey: 'applicationKey' // or masterApplicationKey
+    applicationKey: 'applicationKey', // or masterApplicationKey
+    // optional:
+    axios: {
+        // overrides the axios instance default config, see https://github.com/axios/axios
+    },
+    retry: {
+        retries: 3 // this is the default
+        // for additional options, see https://github.com/softonic/axios-retry
+    }
 });
 
+// common arguments - you can use these in any of the functions below
+const common_args = {
+    // axios request level config, see https://github.com/axios/axios#request-config
+    axios: {
+        timeout: 30000 // (example)
+    },
+    axiosOverride: {
+        /* Don't use me unless you know what you're doing! */
+    }
+}
+
 // authorize with provided credentials
-b2.authorize();  // returns promise
+b2.authorize({
+    // ...common arguments (optional)
+});  // returns promise
 
 // create bucket
-b2.createBucket(
-    bucketName,
-    bucketType // one of `allPublic`, `allPrivate`
-);  // returns promise
+b2.createBucket({
+    bucketName: 'bucketName',
+    bucketType: 'bucketType' // one of `allPublic`, `allPrivate`
+    // ...common arguments (optional)
+});  // returns promise
 
 // delete bucket
-b2.deleteBucket(bucketId);  // returns promise
+b2.deleteBucket({
+    bucketId: 'bucketId'
+    // ...common arguments (optional)
+});  // returns promise
 
 // list buckets
-b2.listBuckets();  // returns promise
+b2.listBuckets({
+    // ...common arguments (optional)
+});  // returns promise
 
 // get the bucket
 b2.getBucket({
-    bucketName, 
-    bucketId // optional
+    bucketName: 'bucketName',
+    bucketId: 'bucketId' // optional
+    // ...common arguments (optional)
 });  // returns promise
 
 // update bucket
-b2.updateBucket(bucketId, bucketType);  // returns promise
+b2.updateBucket({
+    bucketId: 'bucketId',
+    bucketType: 'bucketType'
+    // ...common arguments (optional)
+});  // returns promise
 
 // get upload url
-b2.getUploadUrl(bucketId);  // returns promise
+b2.getUploadUrl({
+    bucketId: 'bucketId'
+    // ...common arguments (optional)
+});  // returns promise
 
 // upload file
 b2.uploadFile({
@@ -145,6 +149,7 @@ b2.uploadFile({
         key2: 'value'
     },
     onUploadProgress: (event) => {} || null // progress monitoring
+    // ...common arguments (optional)
 });  // returns promise
 
 // list file names
@@ -154,30 +159,37 @@ b2.listFileNames({
     maxFileCount: 100,
     delimiter: '',
     prefix: ''
+    // ...common arguments (optional)
 });  // returns promise
 
 // list file versions
 b2.listFileVersions({
     bucketId: 'bucketId',
     startFileName: 'startFileName',
     maxFileCount: 100
+    // ...common arguments (optional)
 });  // returns promise
 
 // hide file
 b2.hideFile({
     bucketId: 'bucketId',
     fileName: 'fileName'
+    // ...common arguments (optional)
 });  // returns promise
 
 // get file info
-b2.getFileInfo(fileId);  // returns promise
+b2.getFileInfo({
+    fileId: 'fileId'
+    // ...common arguments (optional)
+});  // returns promise
 
 // get download authorization
 b2.getDownloadAuthorization({
     bucketId: 'bucketId',
     fileNamePrefix: 'fileNamePrefix',
     validDurationInSeconds: 'validDurationInSeconds', // a number from 0 to 604800
     b2ContentDisposition: 'b2ContentDisposition'
+    // ...common arguments (optional)
 });  // returns promise
 
 // download file by name
@@ -186,30 +198,35 @@ b2.downloadFileByName({
     fileName: 'fileName',
     responseType: 'arraybuffer', // options are as in axios: 'arraybuffer', 'blob', 'document', 'json', 'text', 'stream'
     onDownloadProgress: (event) => {} || null // progress monitoring
+    // ...common arguments (optional)
 });  // returns promise
 
 // download file by fileId
 b2.downloadFileById({
     fileId: 'fileId',
     responseType: 'arraybuffer', // options are as in axios: 'arraybuffer', 'blob', 'document', 'json', 'text', 'stream'
     onDownloadProgress: (event) => {} || null // progress monitoring
+    // ...common arguments (optional)
 });  // returns promise
 
 // delete file version
 b2.deleteFileVersion({
     fileId: 'fileId',
     fileName: 'fileName'
+    // ...common arguments (optional)
 });  // returns promise
 
 // start large file
 b2.startLargeFile({
     bucketId: 'bucketId',
     fileName: 'fileName'
+    // ...common arguments (optional)
 }); // returns promise
 
 // get upload part url
 b2.getUploadPartUrl({
     fileId: 'fileId'
+    // ...common arguments (optional)
 }); // returns promise
 
 // get upload part
@@ -220,22 +237,82 @@ b2.uploadPart({
     data: Buffer // this is expecting a Buffer not an encoded string,
     hash: 'sha1-hash', // optional data hash, will use sha1(data) if not provided
     onUploadProgress: (event) => {} || null // progress monitoring
+    // ...common arguments (optional)
 }); // returns promise
 
 // finish large file
 b2.finishLargeFile({
     fileId: 'fileId',
     partSha1Array: [partSha1Array] // array of sha1 for each part
+    // ...common arguments (optional)
 }); // returns promise
 
 // cancel large file
 b2.cancelLargeFile({
     fileId: 'fileId'
+    // ...common arguments (optional)
 }); // returns promise
 ```
 
-### Authors
+### Uploading Large Files Example
+
+To upload large files, you should split the file into parts (between 5MB and 5GB) and upload each part seperately.
+
+First, you initiate the large file upload to get the fileId:
+
+```javascript
+let response = await b2.startLargeFile({ bucketId, fileName });
+let fileId = response.data.fileId;
+```
+
+Then for each part you request an `uploadUrl`, and use the response to upload the part:
+
+```javascript
+let response = await b2.getUploadPartUrl({ fileId });
+
+let uploadURL = response.data.uploadUrl;
+let authToken = response.data.authorizationToken;
+
+response = await b2.uploadPart({
+    partNumber: parNum,
+    uploadUrl: uploadURL,
+    uploadAuthToken: authToken,
+    data: buf
+});
+// status checks etc.
+```
+
+Then finish the uploadUrl:
+
+```javascript
+let response = await b2.finishLargeFile({
+    fileId,
+    partSha1Array: parts.map(buf => sha1(buf))
+})
+```
+
+## Changes
+
+See the [CHANGELOG](https://github.com/yakovkhalinsky/backblaze-b2/blob/master/CHANGELOG.md) for a history of updates.
+
+### Upgrading from 0.9.x to 1.0.x
+
+For this update, we've switched the back end HTTP request library from `request` to `axios` as it has better Promise and progress support built in. However, there are a couple changes that will break your code and ruin your day. Here are the changes:
+
+* The Promise resolution has a different data structure. Where previously, the request response data was the root object in the promise resolution (`res`), this data now resides in `res.data`.
+* In v0.9.12, we added request progress reporting via the third parameter to `then()`. Because we are no longer using the same promise library, this functionality has been removed. However, progress reporting is still available by passing a callback function into the `b2.method()` that you're calling. See the documentation below for details.
+* In v0.9.x, `b2.downloadFileById()` accepted a `fileId` parameter as a String or Number. As of 1.0.0, the first parameter is now expected to be a plain Object of arguments.
+
+## Contributing
+
+Contributions, suggestions, and questions are welcome. Please review the [contributing guidelines](CONTRIBUTING.md) for details.
+
+### Authors and Contributors
 
 * Yakov Khalinsky (@yakovkhalinsky)
 * Ivan Kalinin (@IvanKalinin) at Isolary
 * Brandon Patton (@crazyscience) at Isolary
+* C. Bess (@cbess)
+* Amit (@Amit-A)
+* Zsombor Paróczi (@realhidden)
+* Oden (@odensc)

lib/actions/auth.js

@@ -1,11 +1,16 @@
-var conf = require('../../conf');
-var request = require('./../request');
-var utils = require('./../utils');
+const _ = require('lodash');
+const conf = require('../../conf');
+const request = require('./../request');
+const utils = require('./../utils');
 
-exports.authorize = function(b2) {
-    var options = getRequestOptions(b2.accountId, b2.applicationKey);
-
-    var axiosInstance = request.getInstance();
+exports.authorize = function(b2, args) {
+    // merge order matters here: later objects override earlier objects
+    const options = _.merge({},
+        _.get(args, 'axios', {}),
+        getRequestOptions(b2.accountId, b2.applicationKey),
+        _.get(args, 'axiosOverride', {})
+    );
+    const axiosInstance = request.getInstance();
     return axiosInstance(options).then(function(res) {
         utils.saveAuthContext(b2, res.data);
         return res; // For testing and/or Promise chaining