Fix zero division error

Author: wkh237

src/android/src/main/java/com/RNFetchBlob/RNFetchBlobBody.java

@@ -372,7 +372,7 @@ public FormField(ReadableMap rawData) {
      */
     private void emitUploadProgress(int written) {
         RNFetchBlobProgressConfig config = RNFetchBlobReq.getReportUploadProgress(mTaskId);
-        if(config.enable && config.shouldReport((float)written/contentLength)) {
+        if(config != null && contentLength != 0 && config.shouldReport((float)written/contentLength)) {
             WritableMap args = Arguments.createMap();
             args.putString("taskId", mTaskId);
             args.putString("written", String.valueOf(written));

src/android/src/main/java/com/RNFetchBlob/RNFetchBlobReq.java

@@ -92,7 +92,6 @@ enum ResponseFormat {
     ResponseFormat responseFormat = ResponseFormat.Auto;
     WritableMap respInfo;
     boolean timeout = false;
-
     ArrayList<String> redirects = new ArrayList<>();
 
     public RNFetchBlobReq(ReadableMap options, String taskId, String method, String url, ReadableMap headers, String body, ReadableArray arrayBody, final Callback callback) {

src/android/src/main/java/com/RNFetchBlob/Response/RNFetchBlobDefaultResp.java

@@ -63,7 +63,8 @@ public long read(Buffer sink, long byteCount) throws IOException {
             long read =  mOriginalSource.read(sink, byteCount);
             bytesRead += read > 0 ? read : 0;
             RNFetchBlobProgressConfig reportConfig = RNFetchBlobReq.getReportProgress(mTaskId);
-            if(reportConfig != null && reportConfig.shouldReport(bytesRead/contentLength())) {
+            long cLen = contentLength();
+            if(reportConfig != null && cLen != 0 && reportConfig.shouldReport(bytesRead/contentLength())) {
                 WritableMap args = Arguments.createMap();
                 args.putString("taskId", mTaskId);
                 args.putString("written", String.valueOf(bytesRead));

src/android/src/main/java/com/RNFetchBlob/Response/RNFetchBlobFileResp.java

@@ -80,7 +80,7 @@ public long read(Buffer sink, long byteCount) throws IOException {
                     ofStream.write(bytes, 0, (int) read);
                 }
                 RNFetchBlobProgressConfig reportConfig = RNFetchBlobReq.getReportProgress(mTaskId);
-                if (reportConfig != null && reportConfig.shouldReport(bytesDownloaded / contentLength())) {
+                if (reportConfig != null && contentLength() != 0 &&reportConfig.shouldReport(bytesDownloaded / contentLength())) {
                     WritableMap args = Arguments.createMap();
                     args.putString("taskId", mTaskId);
                     args.putString("written", String.valueOf(bytesDownloaded));

src/ios/RNFetchBlobNetwork.m

@@ -325,6 +325,8 @@ - (void) URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dat
         [writeStream write:[data bytes] maxLength:[data length]];
     }
     RNFetchBlobProgress * pconfig = [progressTable valueForKey:taskId];
+    if(expectedBytes == 0)
+        return;
     NSNumber * now =[NSNumber numberWithFloat:((float)receivedBytes/(float)expectedBytes)];
     if(pconfig != nil && [pconfig shouldReport:now])
     {
@@ -430,6 +432,8 @@ - (void) URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCom
 - (void) URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesWritten totalBytesExpectedToSend:(int64_t)totalBytesExpectedToWrite
 {
     RNFetchBlobProgress * pconfig = [uploadProgressTable valueForKey:taskId];
+    if(totalBytesExpectedToWrite == 0)
+        return;
     NSNumber * now = [NSNumber numberWithFloat:((float)totalBytesWritten/(float)totalBytesExpectedToWrite)];
     if(pconfig != nil && [pconfig shouldReport:now]) {
         [self.bridge.eventDispatcher