Handle Android content URIs for upload

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

 import java.io.InputStream;
 import java.util.ArrayList;
 
+import android.net.Uri;
 import okhttp3.MediaType;
 import okhttp3.RequestBody;
 import okio.BufferedSink;
                     throw new Exception("error when getting request stream: " +e.getLocalizedMessage());
                 }
             }
+        } else if (rawBody.startsWith(RNFetchBlobConst.CONTENT_PREFIX)) {
+            String contentURI = rawBody.substring(RNFetchBlobConst.CONTENT_PREFIX.length());
+            try {
+                return RNFetchBlob.RCTContext.getContentResolver().openInputStream(Uri.parse(contentURI));
+            } catch (Exception e) {
+                throw new Exception("error when getting request stream for content URI: " + contentURI, e);
+            }
         }
         // base 64 encoded
         else {
                             RNFetchBlobUtils.emitWarningEvent("Failed to create form data from path :" + orgPath + ", file not exists.");
                         }
                     }
+                } else if (data.startsWith(RNFetchBlobConst.CONTENT_PREFIX)) {
+                    String contentURI = data.substring(RNFetchBlobConst.CONTENT_PREFIX.length());
+                    InputStream is = null;
+                    try {
+                        is = ctx.getContentResolver().openInputStream(Uri.parse(contentURI));
+                        pipeStreamToFileStream(is, os);
+                    } catch(Exception e) {
+                        RNFetchBlobUtils.emitWarningEvent(
+                                "Failed to create form data from content URI:" + contentURI + ", " + e.getLocalizedMessage());
+                    } finally {
+                        if (is != null) {
+                            is.close();
+                        }
+                    }
                 }
                 // base64 embedded file content
                 else {
      * Compute approximate content length for form data
      * @return ArrayList<FormField>
      */
-    private ArrayList<FormField> countFormDataLength() {
+    private ArrayList<FormField> countFormDataLength() throws IOException {
         long total = 0;
         ArrayList<FormField> list = new ArrayList<>();
         ReactApplicationContext ctx = RNFetchBlob.RCTContext;
                         File file = new File(RNFetchBlobFS.normalizePath(orgPath));
                         total += file.length();
                     }
+                } else if (data.startsWith(RNFetchBlobConst.CONTENT_PREFIX)) {
+                    String contentURI = data.substring(RNFetchBlobConst.CONTENT_PREFIX.length());
+                    InputStream is = null;
+                    try {
+                        is = ctx.getContentResolver().openInputStream(Uri.parse(contentURI));
+                        long length = is.available();
+                        total += length;
+                    } catch(Exception e) {
+                        RNFetchBlobUtils.emitWarningEvent(
+                                "Failed to estimate form data length from content URI:" + contentURI + ", " + e.getLocalizedMessage());
+                    } finally {
+                        if (is != null) {
+                            is.close();
+                        }
+                    }
                 }
                 // base64 embedded file content
                 else {

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

     public static final String EVENT_HTTP_STATE = "RNFetchBlobState";
     public static final String EVENT_MESSAGE = "RNFetchBlobMessage";
     public static final String FILE_PREFIX = "RNFetchBlob-file://";
+    public static final String CONTENT_PREFIX = "RNFetchBlob-content://";
     public static final String FILE_PREFIX_BUNDLE_ASSET = "bundle-assets://";
     public static final String FILE_PREFIX_CONTENT = "content://";
     public static final String DATA_ENCODE_URI = "uri";

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

                     requestType = RequestType.SingleFile;
                 }
                 if(rawRequestBody != null) {
-                    if(rawRequestBody.startsWith(RNFetchBlobConst.FILE_PREFIX)) {
+                    if (rawRequestBody.startsWith(RNFetchBlobConst.FILE_PREFIX)
+                            || rawRequestBody.startsWith(RNFetchBlobConst.CONTENT_PREFIX)) {
                         requestType = RequestType.SingleFile;
                     }
                     else if (cType.toLowerCase().contains(";base64") || cType.toLowerCase().startsWith("application/octet")) {

index.js

 }
 
 function wrap(path:string):string {
-  return 'RNFetchBlob-file://' + path
+  const prefix = path.startsWith('content://') ? 'RNFetchBlob-content://' : 'RNFetchBlob-file://'
+  return prefix + path
 }
 
 /**