- Added logic that introduces the concept of transformers

mmathewsTableau · mmathewsTableau · commit 55abe45f0af2 · 2022-02-28T13:53:25.000-08:00
- adding logic for the library to throw up errors when the library consumer specifies data to be transformed but a transformer has not been set.
diff --git a/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtil.java b/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtil.java
@@ -233,11 +233,11 @@ public void removeSession(ReadableArray paths, Callback callback) {
     }
 
     @ReactMethod
-    public void readFile(final String path, final String encoding, final Promise promise) {
+    public void readFile(final String path, final String encoding, final boolean transformFile, final Promise promise) {
         threadPool.execute(new Runnable() {
             @Override
             public void run() {
-                ReactNativeBlobUtilFS.readFile(path, encoding, promise);
+                ReactNativeBlobUtilFS.readFile(path, encoding, transformFile, promise);
             }
         });
     }
@@ -253,11 +253,11 @@ public void run() {
     }
 
     @ReactMethod
-    public void writeFile(final String path, final String encoding, final String data, final boolean append, final Promise promise) {
+    public void writeFile(final String path, final String encoding, final String data, final boolean transformFile, final boolean append, final Promise promise) {
         threadPool.execute(new Runnable() {
             @Override
             public void run() {
-                ReactNativeBlobUtilFS.writeFile(path, encoding, data, append, promise);
+                ReactNativeBlobUtilFS.writeFile(path, encoding, data, transformFile, append, promise);
             }
         });
     }
diff --git a/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilConfig.java b/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilConfig.java
@@ -8,6 +8,7 @@
 class ReactNativeBlobUtilConfig {
 
     public Boolean fileCache;
+    public Boolean transformFile;
     public String path;
     public String appendExt;
     public ReadableMap addAndroidDownloads;
@@ -26,6 +27,7 @@ class ReactNativeBlobUtilConfig {
         if (options == null)
             return;
         this.fileCache = options.hasKey("fileCache") && options.getBoolean("fileCache");
+        this.transformFile = options.hasKey("transformFile") ? options.getBoolean("transformFile") : false;
         this.path = options.hasKey("path") ? options.getString("path") : null;
         this.appendExt = options.hasKey("appendExt") ? options.getString("appendExt") : "";
         this.trusty = options.hasKey("trusty") && options.getBoolean("trusty");
diff --git a/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilFS.java b/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilFS.java
@@ -121,7 +121,7 @@ static boolean writeFile(String path, String encoding, String data, final boolea
      * @param data     Array passed from JS context.
      * @param promise  RCT Promise
      */
-    static void writeFile(String path, String encoding, String data, final boolean append, final Promise promise) {
+    static void writeFile(String path, String encoding, String data, final boolean transformFile, final boolean append, final Promise promise) {
         try {
             int written;
             File f = new File(path);
@@ -169,6 +169,12 @@ static void writeFile(String path, String encoding, String data, final boolean a
                 }
             } else {
                 byte[] bytes = ReactNativeBlobUtilUtils.stringToBytes(data, encoding);
+                if (transformFile) {
+                    if (ReactNativeBlobUtilFileTransformer.sharedFileTransformer == null) {
+                        throw new IllegalStateException("Write file with transform was specified but the shared file transformer is not set");
+                    }
+                    bytes = ReactNativeBlobUtilFileTransformer.sharedFileTransformer.onWriteFile(bytes);
+                }
                 FileOutputStream fout = new FileOutputStream(f, append);
                 try {
                     fout.write(bytes);
@@ -237,7 +243,7 @@ static void writeFile(String path, ReadableArray data, final boolean append, fin
      * @param encoding Encoding of read stream.
      * @param promise  JS promise
      */
-    static void readFile(String path, String encoding, final Promise promise) {
+    static void readFile(String path, String encoding, final boolean transformFile, final Promise promise) {
         String resolved = ReactNativeBlobUtilUtils.normalizePath(path);
         if (resolved != null)
             path = resolved;
@@ -280,6 +286,13 @@ else if (resolved == null) {
                 return;
             }
 
+            if (transformFile) {
+                if (ReactNativeBlobUtilFileTransformer.sharedFileTransformer == null) {
+                    throw new IllegalStateException("Read file with transform was specified but the shared file transformer is not set");
+                }
+                bytes = ReactNativeBlobUtilFileTransformer.sharedFileTransformer.onReadFile(bytes);
+            }
+
             switch (encoding.toLowerCase(Locale.ROOT)) {
                 case "base64":
                     promise.resolve(Base64.encodeToString(bytes, Base64.NO_WRAP));
diff --git a/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilFileTransformer.java b/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilFileTransformer.java
@@ -0,0 +1,10 @@
+package com.ReactNativeBlobUtil;
+
+public class ReactNativeBlobUtilFileTransformer {
+    public interface FileTransformer {
+        public byte[] onWriteFile(byte[] data);
+        public byte[] onReadFile(byte[] data);
+    }
+
+    public static ReactNativeBlobUtilFileTransformer.FileTransformer sharedFileTransformer;
+}
diff --git a/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilReq.java b/android/src/main/java/com/ReactNativeBlobUtil/ReactNativeBlobUtilReq.java
@@ -87,6 +87,12 @@ enum ResponseFormat {
         BASE64
     }
 
+    private boolean shouldTransformFile() {
+        return this.options.transformFile &&
+            // Can only process if it's written to a file
+            (this.options.fileCache || this.options.path != null);
+    }
+
     public static HashMap<String, Call> taskTable = new HashMap<>();
     public static HashMap<String, Long> androidDownloadManagerTaskTable = new HashMap<>();
     static HashMap<String, ReactNativeBlobUtilProgressConfig> progressReport = new HashMap<>();
@@ -124,7 +130,9 @@ public ReactNativeBlobUtilReq(ReadableMap options, String taskId, String method,
         this.rawRequestBodyArray = arrayBody;
         this.client = client;
 
-        if (this.options.fileCache || this.options.path != null)
+        // If transformFile is specified, we first want to get the response back in memory so we can
+        // encrypt it wholesale and at that point, write it into the file storage.
+        if((this.options.fileCache || this.options.path != null) && !this.shouldTransformFile())
             responseType = ResponseType.FileStorage;
         else
             responseType = ResponseType.KeepInMemory;
@@ -557,6 +565,23 @@ private void done(Response resp) {
                     // response data directly pass to JS context as string.
                     else {
                         byte[] b = resp.body().bytes();
+                        // If process file option is turned on, we first keep response in memory and then stream that content
+                        // after processing
+                        if (this.shouldTransformFile()) {
+                            if (ReactNativeBlobUtilFileTransformer.sharedFileTransformer == null) {
+                                throw new IllegalStateException("Write file with transform was specified but the shared file transformer is not set");
+                            }
+                            this.destPath = this.destPath.replace("?append=true", "");
+                            File file = new File(this.destPath);
+                            if (!file.exists()) {
+                                file.createNewFile();
+                            }
+                            try (FileOutputStream fos = new FileOutputStream(file)) {
+                                fos.write(ReactNativeBlobUtilFileTransformer.sharedFileTransformer.onWriteFile(b));
+                            }
+                            callback.invoke(null, ReactNativeBlobUtilConst.RNFB_RESPONSE_PATH, this.destPath);
+                            return;
+                        }
                         if (responseFormat == ResponseFormat.BASE64) {
                             callback.invoke(null, ReactNativeBlobUtilConst.RNFB_RESPONSE_BASE64, android.util.Base64.encodeToString(b, Base64.NO_WRAP));
                             return;
diff --git a/fs.js b/fs.js
@@ -160,7 +160,20 @@ function readFile(path: string, encoding: string = 'utf8'): Promise<any> {
     if (typeof path !== 'string') {
         return Promise.reject(addCode('EINVAL', new TypeError('Missing argument "path" ')));
     }
-    return ReactNativeBlobUtil.readFile(path, encoding);
+    return ReactNativeBlobUtil.readFile(path, encoding, false);
+}
+
+/**
+ * Reads the file, then transforms it before returning the content
+ * @param  {string} path Path of the file.
+ * @param  {'base64' | 'utf8' | 'ascii'} encoding Encoding of read stream.
+ * @return {Promise<Array<number> | string>}
+ */
+function readFileWithTransform(path: string, encoding: string = 'utf8'): Promise<any> {
+    if (typeof path !== 'string') {
+        return Promise.reject(addCode('EINVAL', new TypeError('Missing argument "path" ')))
+    }
+    return ReactNativeBlobUtil.readFile(path, encoding, true);
 }
 
 /**
@@ -186,7 +199,31 @@ function writeFile(path: string, data: string | Array<number>, encoding: ?string
             return Promise.reject(addCode('EINVAL', new TypeError(`"data" must be a String when encoding is "utf8" or "base64", but it is "${typeof data}"`)));
         }
         else
-            return ReactNativeBlobUtil.writeFile(path, encoding, data, false);
+            return ReactNativeBlobUtil.writeFile(path, encoding, data, false, false);
+    }
+}
+
+/**
+ * Transforms the data and then writes to the file.
+ * @param  {string} path  Path of the file.
+ * @param  {string | number[]} data Data to write to the file.
+ * @param  {string} encoding Encoding of data (Optional).
+ * @return {Promise}
+ */
+function writeFileWithTransform(path: string, data: string | Array<number>, encoding: ?string = 'utf8'): Promise {
+    if (typeof path !== 'string') {
+        return Promise.reject(addCode('EINVAL', new TypeError('Missing argument "path" ')))
+    }
+    if (encoding.toLocaleLowerCase() === 'ascii') {
+        return Promise.reject(addCode('EINVAL', new TypeError('ascii is not supported for converted files')))
+    }
+    else {
+        if (typeof data !== 'string') {
+            return Promise.reject(addCode('EINVAL', new TypeError(`"data" must be a String when encoding is "utf8" or "base64", but it is "${typeof data}"`)))
+        }
+
+        else
+            return ReactNativeBlobUtil.writeFile(path, encoding, data, true, false)
     }
 }
 
@@ -415,6 +452,8 @@ export default {
     cp,
     writeStream,
     writeFile,
+    writeFileWithTransform,
+    readFileWithTransform,
     appendFile,
     pathForAppGroup,
     syncPathAppGroup,
diff --git a/index.d.ts b/index.d.ts
@@ -399,6 +399,14 @@ export interface FS {
      */
     writeFile(path: string, data: string | number[], encoding?: Encoding): Promise<void>;
 
+    /**
+     * Processes the data and then writes to the file.
+     * @param  path  Path of the file.
+     * @param  data Data to write to the file.
+     * @param  encoding Encoding of data (Optional).
+     */
+     writeFileWithTransform(path: string, data: string | number[], encoding?: Encoding): Promise<void>;
+
     appendFile(path: string, data: string | number[], encoding?: Encoding | "uri"): Promise<number>;
 
     /**
@@ -408,6 +416,13 @@ export interface FS {
      */
     readFile(path: string, encoding: Encoding, bufferSize?: number): Promise<any>;
 
+    /**
+     * Reads from a file and then processes the data before returning
+     * @param  path Path of the file.
+     * @param  encoding Encoding of read stream.
+     */
+     readFileWithTransform(path: string, encoding: Encoding, bufferSize?: number): Promise<any>;
+
     /**
      * Check if file exists and if it is a folder.
      * @param  path Path to check
@@ -698,6 +713,13 @@ export interface ReactNativeBlobUtilConfig {
      */
     fileCache?: boolean;
 
+    /**
+     * Set this property to true if you want the data to be processed before it gets written onto disk.
+     * This only has effect if the FileTransformer has been registered and the library is configured to write
+     * response onto disk.
+     */
+    transformFile?: boolean;
+
     /**
      * Set this property to change temp file extension that created by fetch response data.
      */
diff --git a/ios/ReactNativeBlobUtil.xcodeproj/project.pbxproj b/ios/ReactNativeBlobUtil.xcodeproj/project.pbxproj
@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		8C4801A6200CF71700FED7ED /* ReactNativeBlobUtilRequest.m in Sources */ = {isa = PBXBuildFile; fileRef = 8C4801A5200CF71700FED7ED /* ReactNativeBlobUtilRequest.m */; };
+		9FD8D3C326F1736000009F35 /* ReactNativeBlobUtilFileTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 9FD8D3C226F1736000009F35 /* ReactNativeBlobUtilFileTransformer.m */; };
 		A158F4271D052E49006FFD38 /* ReactNativeBlobUtilFS.m in Sources */ = {isa = PBXBuildFile; fileRef = A158F4261D052E49006FFD38 /* ReactNativeBlobUtilFS.m */; };
 		A158F42D1D0535BB006FFD38 /* ReactNativeBlobUtilConst.m in Sources */ = {isa = PBXBuildFile; fileRef = A158F42C1D0535BB006FFD38 /* ReactNativeBlobUtilConst.m */; };
 		A158F4301D0539DB006FFD38 /* ReactNativeBlobUtilNetwork.m in Sources */ = {isa = PBXBuildFile; fileRef = A158F42F1D0539DB006FFD38 /* ReactNativeBlobUtilNetwork.m */; };
@@ -32,6 +33,8 @@
 /* Begin PBXFileReference section */
 		8C4801A4200CF71700FED7ED /* ReactNativeBlobUtilRequest.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ReactNativeBlobUtilRequest.h; sourceTree = "<group>"; };
 		8C4801A5200CF71700FED7ED /* ReactNativeBlobUtilRequest.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ReactNativeBlobUtilRequest.m; sourceTree = "<group>"; };
+		9FD8D3C126F1709A00009F35 /* ReactNativeBlobUtilFileTransformer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ReactNativeBlobUtilFileTransformer.h; sourceTree = "<group>"; };
+		9FD8D3C226F1736000009F35 /* ReactNativeBlobUtilFileTransformer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ReactNativeBlobUtilFileTransformer.m; sourceTree = "<group>"; };
 		A158F4261D052E49006FFD38 /* ReactNativeBlobUtilFS.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ReactNativeBlobUtilFS.m; sourceTree = "<group>"; };
 		A158F4281D052E57006FFD38 /* ReactNativeBlobUtilFS.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ReactNativeBlobUtilFS.h; sourceTree = "<group>"; };
 		A158F4291D0534A9006FFD38 /* ReactNativeBlobUtilConst.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ReactNativeBlobUtilConst.h; sourceTree = "<group>"; };
@@ -69,6 +72,8 @@
 		A15C30051CD25C330074CB35 = {
 			isa = PBXGroup;
 			children = (
+				9FD8D3C226F1736000009F35 /* ReactNativeBlobUtilFileTransformer.m */,
+				9FD8D3C126F1709A00009F35 /* ReactNativeBlobUtilFileTransformer.h */,
 				A19B48241D98102400E6868A /* ReactNativeBlobUtilProgress.m */,
 				A19B48231D98100800E6868A /* ReactNativeBlobUtilProgress.h */,
 				A1F950181D7E9134002A95A6 /* IOS7Polyfill.h */,
@@ -156,6 +161,7 @@
 				A166D1AA1CE0647A00273590 /* ReactNativeBlobUtil.h in Sources */,
 				8C4801A6200CF71700FED7ED /* ReactNativeBlobUtilRequest.m in Sources */,
 				A158F42D1D0535BB006FFD38 /* ReactNativeBlobUtilConst.m in Sources */,
+				9FD8D3C326F1736000009F35 /* ReactNativeBlobUtilFileTransformer.m in Sources */,
 				A158F4271D052E49006FFD38 /* ReactNativeBlobUtilFS.m in Sources */,
 				A158F4301D0539DB006FFD38 /* ReactNativeBlobUtilNetwork.m in Sources */,
 				A19B48251D98102400E6868A /* ReactNativeBlobUtilProgress.m in Sources */,
diff --git a/ios/ReactNativeBlobUtil/ReactNativeBlobUtil.m b/ios/ReactNativeBlobUtil/ReactNativeBlobUtil.m
@@ -252,9 +252,9 @@ - (NSDictionary *)constantsToExport
 }
 
 #pragma mark - fs.writeFile
-RCT_EXPORT_METHOD(writeFile:(NSString *)path encoding:(NSString *)encoding data:(NSString *)data append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
+RCT_EXPORT_METHOD(writeFile:(NSString *)path encoding:(NSString *)encoding data:(NSString *)data transformFile:(BOOL)transformFile append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
 {
-    [ReactNativeBlobUtilFS writeFile:path encoding:[NSString stringWithString:encoding] data:data append:append resolver:resolve rejecter:reject];
+    [ReactNativeBlobUtilFS writeFile:path encoding:[NSString stringWithString:encoding] data:data transformFile:transformFile append:append resolver:resolve rejecter:reject];
 }
 
 #pragma mark - fs.writeArray
@@ -494,11 +494,12 @@ - (NSDictionary *)constantsToExport
 #pragma mark - fs.readFile
 RCT_EXPORT_METHOD(readFile:(NSString *)path
                   encoding:(NSString *)encoding
+                  transformFile:(BOOL) transformFile
                   resolver:(RCTPromiseResolveBlock)resolve
                   rejecter:(RCTPromiseRejectBlock)reject)
 {
     
-    [ReactNativeBlobUtilFS readFile:path encoding:encoding onComplete:^(NSData * content, NSString * code, NSString * err) {
+    [ReactNativeBlobUtilFS readFile:path encoding:encoding transformFile:transformFile onComplete:^(NSData * content, NSString * code, NSString * err) {
         if(err != nil) {
             reject(code, err, nil);
             return;
diff --git a/ios/ReactNativeBlobUtilConst.h b/ios/ReactNativeBlobUtilConst.h
@@ -29,6 +29,7 @@ extern NSString *const AL_PREFIX;
 
 // config
 extern NSString *const CONFIG_USE_TEMP;
+extern NSString *const CONFIG_TRANSFORM_FILE;
 extern NSString *const CONFIG_FILE_PATH;
 extern NSString *const CONFIG_FILE_EXT;
 extern NSString *const CONFIG_TRUSTY;
diff --git a/ios/ReactNativeBlobUtilConst.m b/ios/ReactNativeBlobUtilConst.m
@@ -13,6 +13,7 @@
 
 // fetch configs
 NSString *const CONFIG_USE_TEMP = @"fileCache";
+NSString *const CONFIG_TRANSFORM_FILE = @"transformFile";
 NSString *const CONFIG_FILE_PATH = @"path";
 NSString *const CONFIG_FILE_EXT = @"appendExt";
 NSString *const CONFIG_TRUSTY = @"trusty";
diff --git a/ios/ReactNativeBlobUtilFS.h b/ios/ReactNativeBlobUtilFS.h
@@ -72,7 +72,8 @@
 + (NSDictionary *) stat:(NSString *) path error:(NSError **) error;
 + (void) exists:(NSString *) path callback:(RCTResponseSenderBlock)callback;
 + (void) writeFileArray:(NSString *)path data:(NSArray *)data append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject;
-+ (void) writeFile:(NSString *)path encoding:(NSString *)encoding data:(NSString *)data append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject;
++ (void) writeFile:(NSString *)path encoding:(NSString *)encoding data:(NSString *)data transformFile:(BOOL)transformFile append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject;
++ (void) readFile:(NSString *)path encoding:(NSString *)encoding transformFile:(BOOL)transformFile onComplete:(void (^)(NSData * content, NSString* code, NSString * errMsg))onComplete;
 + (void) readFile:(NSString *)path encoding:(NSString *)encoding onComplete:(void (^)(NSData * content, NSString* code, NSString * errMsg))onComplete;
 + (void) readAssetFile:(NSData *)assetUrl completionBlock:(void(^)(NSData * content))completionBlock failBlock:(void(^)(NSError * err))failBlock;
 + (void) slice:(NSString *)path
diff --git a/ios/ReactNativeBlobUtilFS.m b/ios/ReactNativeBlobUtilFS.m
diff --git a/ios/ReactNativeBlobUtilFileTransformer.h b/ios/ReactNativeBlobUtilFileTransformer.h
diff --git a/ios/ReactNativeBlobUtilFileTransformer.m b/ios/ReactNativeBlobUtilFileTransformer.m
diff --git a/ios/ReactNativeBlobUtilReqBuilder.m b/ios/ReactNativeBlobUtilReqBuilder.m
diff --git a/ios/ReactNativeBlobUtilRequest.m b/ios/ReactNativeBlobUtilRequest.m
diff --git a/types.js b/types.js

Original file line number	Diff line number	Diff line change
`@@ -233,11 +233,11 @@ public void removeSession(ReadableArray paths, Callback callback) {`
`233`	`233`	`}`
`234`	`234`
`235`	`235`	`@ReactMethod`
`236`		`- public void readFile(final String path, final String encoding, final Promise promise) {`
	`236`	`+ public void readFile(final String path, final String encoding, final boolean transformFile, final Promise promise) {`
`237`	`237`	`threadPool.execute(new Runnable() {`
`238`	`238`	`@Override`
`239`	`239`	`public void run() {`
`240`		`- ReactNativeBlobUtilFS.readFile(path, encoding, promise);`
	`240`	`+ ReactNativeBlobUtilFS.readFile(path, encoding, transformFile, promise);`
`241`	`241`	`}`
`242`	`242`	`});`
`243`	`243`	`}`
`@@ -253,11 +253,11 @@ public void run() {`
`253`	`253`	`}`
`254`	`254`
`255`	`255`	`@ReactMethod`
`256`		`- public void writeFile(final String path, final String encoding, final String data, final boolean append, final Promise promise) {`
	`256`	`+ public void writeFile(final String path, final String encoding, final String data, final boolean transformFile, final boolean append, final Promise promise) {`
`257`	`257`	`threadPool.execute(new Runnable() {`
`258`	`258`	`@Override`
`259`	`259`	`public void run() {`
`260`		`- ReactNativeBlobUtilFS.writeFile(path, encoding, data, append, promise);`
	`260`	`+ ReactNativeBlobUtilFS.writeFile(path, encoding, data, transformFile, append, promise);`
`261`	`261`	`}`
`262`	`262`	`});`
`263`	`263`	`}`
Original file line number	Diff line number	Diff line change
`@@ -252,9 +252,9 @@ - (NSDictionary *)constantsToExport`
`252`	`252`	`}`
`253`	`253`
`254`	`254`	`#pragma mark - fs.writeFile`
`255`		`-RCT_EXPORT_METHOD(writeFile:(NSString )path encoding:(NSString )encoding data:(NSString *)data append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)`
	`255`	`+RCT_EXPORT_METHOD(writeFile:(NSString )path encoding:(NSString )encoding data:(NSString *)data transformFile:(BOOL)transformFile append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)`
`256`	`256`	`{`
`257`		`- [ReactNativeBlobUtilFS writeFile:path encoding:[NSString stringWithString:encoding] data:data append:append resolver:resolve rejecter:reject];`
	`257`	`+ [ReactNativeBlobUtilFS writeFile:path encoding:[NSString stringWithString:encoding] data:data transformFile:transformFile append:append resolver:resolve rejecter:reject];`
`258`	`258`	`}`
`259`	`259`
`260`	`260`	`#pragma mark - fs.writeArray`
`@@ -494,11 +494,12 @@ - (NSDictionary *)constantsToExport`
`494`	`494`	`#pragma mark - fs.readFile`
`495`	`495`	`RCT_EXPORT_METHOD(readFile:(NSString *)path`
`496`	`496`	`encoding:(NSString *)encoding`
	`497`	`+ transformFile:(BOOL) transformFile`
`497`	`498`	`resolver:(RCTPromiseResolveBlock)resolve`
`498`	`499`	`rejecter:(RCTPromiseRejectBlock)reject)`
`499`	`500`	`{`
`500`	`501`
`501`		`- [ReactNativeBlobUtilFS readFile:path encoding:encoding onComplete:^(NSData * content, NSString * code, NSString * err) {`
	`502`	`+ [ReactNativeBlobUtilFS readFile:path encoding:encoding transformFile:transformFile onComplete:^(NSData * content, NSString * code, NSString * err) {`
`502`	`503`	`if(err != nil) {`
`503`	`504`	`reject(code, err, nil);`
`504`	`505`	`return;`