feat(image-loader): allow setting FileTransfer options

closes #88

README.md

@@ -266,6 +266,19 @@ Example:
 this.imageLoaderConfig.enableFallbackAsPlaceholder(true);
 ```
 ---
+#### setFileTransferOptions(options: any)
+Set options for FileTransfer plugin to use. If you would like to set a value for the `trustAllHosts` param, you can add it to the options object.
+
+Example:
+```ts
+this.imageLoaderConfig.setFileTransferOptions({
+  trustAllHosts: true, // defaults to false
+  headers: {
+    Authorization: 'Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=='
+  }
+});
+```
+---
 
 # Preloading images
 ```typescript

src/providers/image-loader-config.ts

@@ -35,6 +35,10 @@ export class ImageLoaderConfig {
 
   spinnerColor: string;
 
+  fileTransferOptions: any = {
+    trustAllHosts: false
+  };
+
   private _cacheDirectoryName: string = 'image-loader-cache';
 
   set cacheDirectoryName(name: string) {
@@ -182,4 +186,12 @@ export class ImageLoaderConfig {
     this.spinnerColor = color;
   }
 
+  /**
+   * Set options for the FileTransfer plugin
+   * @param options
+   */
+  setFileTransferOptions(options: { trustAllHosts: boolean; [key: string]: any; }): void {
+    this.fileTransferOptions = options;
+  }
+
 }

src/providers/image-loader.ts

@@ -241,7 +241,7 @@ export class ImageLoader {
 
     // take the first item from queue
     const currentItem: QueueItem = this.queue.splice(0, 1)[0];
-    
+
     // create FileTransferObject instance if needed
     // we would only reach here if current jobs < concurrency limit
     // so, there's no need to check anything other than the length of
@@ -266,7 +266,7 @@ export class ImageLoader {
 
     const localPath = this.file.cacheDirectory + this.config.cacheDirectoryName + '/' + this.createFileName(currentItem.imageUrl);
 
-    transfer.download(currentItem.imageUrl, localPath)
+    transfer.download(currentItem.imageUrl, localPath, Boolean(this.config.fileTransferOptions.trustAllHosts), this.config.fileTransferOptions)
       .then((file: FileEntry) => {
         if (this.shouldIndex) {
           this.addFileToIndex(file).then(this.maintainCacheSize.bind(this));