Replace file names with underscore when they have slash /

src/components/AttachmentPicker/index.js

@@ -1,6 +1,7 @@
 import React from 'react';
 import CONST from '../../CONST';
 import {propTypes, defaultProps} from './attachmentPickerPropTypes';
+import * as FileUtils from '../../libs/fileDownload/FileUtils';
 
 /**
  * Returns acceptable FileTypes based on ATTACHMENT_PICKER_TYPE
@@ -31,10 +32,14 @@ class AttachmentPicker extends React.Component {
                     type="file"
                     ref={el => this.fileInput = el}
                     onChange={(e) => {
-                        const file = e.target.files[0];
+                        let file = e.target.files[0];
 
                         if (file) {
+                            const cleanName = FileUtils.cleanFileName(file.name);
                             file.uri = URL.createObjectURL(file);
+                            if (file.name !== cleanName) {
+                                file = new File([file], cleanName);
+                            }
                             this.onPicked(file);
                         }
 

src/components/AttachmentPicker/index.native.js

@@ -18,6 +18,7 @@ import withLocalize, {withLocalizePropTypes} from '../withLocalize';
 import compose from '../../libs/compose';
 import launchCamera from './launchCamera';
 import CONST from '../../CONST';
+import * as FileUtils from '../../libs/fileDownload/FileUtils';
 
 const propTypes = {
     ...basePropTypes,
@@ -72,7 +73,7 @@ function getDataForUpload(fileData) {
         fileName = `${fileName}${fileExtension}`;
     }
     const fileResult = {
-        name: fileName,
+        name: FileUtils.cleanFileName(fileName),
         type: fileData.type,
         width: fileData.width,
         height: fileData.height,

src/libs/fileDownload/FileUtils.js

@@ -116,11 +116,22 @@ function splitExtensionFromFileName(fullFileName) {
     return {fileName: splitFileName.join('.'), fileExtension};
 }
 
+/**
+ * Returns the filename replacing special characters with underscore
+ *
+ * @param {String} fileName
+ * @returns {String}
+ */
+function cleanFileName(fileName) {
+    return fileName.replace(/[^a-zA-Z0-9\-._]/g, '_');
+}
+
 export {
     showGeneralErrorAlert,
     showSuccessAlert,
     showPermissionErrorAlert,
     splitExtensionFromFileName,
     getAttachmentName,
     getFileType,
+    cleanFileName,
 };