allowing node-apac through proxy

README.md

@@ -116,6 +116,22 @@ ES|Spain|webservices.amazon.es
 UK|United Kingdom|webservices.amazon.co.uk
 US|United States|webservices.amazon.com
 
+## Proxy
+
+To allow node-apac through proxy, set the proxy configuration
+
+```javascript
+var opHelper = new OperationHelper({
+    awsId:     '[YOUR AWS ID HERE]',
+    awsSecret: '[YOUR AWS SECRET HERE]',
+    assocId:   '[YOUR ASSOCIATE TAG HERE]',
+    proxyHostname:    '[YOUR PROXY HOSTNAME HERE]',
+    proxyPort:    '[YOUR PROXY PORT HERE]', # default 8080
+    proxyUsername: '[YOUR PROXY USERNAME HERE]'
+    proxyPassword: '[YOUR PROXY PASSWORD HERE]'
+});
+```
+
 ## Contributing
 
 Feel free to submit a pull request. If you'd like, you may discuss the change with me first by submitting an issue.

lib/operation-helper.js

@@ -35,6 +35,10 @@ class OperationHelper {
         this.baseUri = params.baseUri || OperationHelper.defaultBaseUri
         this.xml2jsOptions = Object.assign({}, defaultXml2JsOptions, params.xml2jsOptions)
         this.throttler = new Throttler(params.maxRequestsPerSecond)
+        this.proxyUsername = params.proxyUsername
+        this.proxyPassword = params.proxyPassword
+        this.proxyHostname = params.proxyHostname
+        this.proxyPort = params.proxyPort || 8080
 
         // set version
         if (typeof(params.version) === 'string') OperationHelper.version = params.version
@@ -91,6 +95,21 @@ class OperationHelper {
             path: uri,
             method: 'GET'
         }
+        if (this.proxyHostname) {
+            options = {
+                hostname: this.proxyHostname,
+                port: this.proxyPort,
+                path: 'http://' + host + uri,
+                method: 'GET',
+                headers: {
+                    Host: host
+                }
+            }
+            if (this.proxyUsername) {
+                var auth = 'Basic ' + new Buffer(this.proxyUsername + ':' + this.proxyPassword).toString('base64')
+                options.headers["Proxy-Authorization"] = auth
+            }
+        }
 
         if (scheme) options['scheme'] = scheme;