feat: encoding for export stream

packages/nocodb/src/controllers/attachments.controller.ts

@@ -168,6 +168,7 @@ export class AttachmentsController {
 
       let queryResponseContentType = null;
       let queryResponseContentDisposition = null;
+      let queryResponseContentEncoding = null;
 
       if (queryHelper.length > 1) {
         const query = new URLSearchParams(queryHelper[1]);
@@ -175,6 +176,7 @@ export class AttachmentsController {
         queryResponseContentDisposition = query.get(
           'ResponseContentDisposition',
         );
+        queryResponseContentEncoding = query.get('ResponseContentEncoding');
       }
 
       const targetParam = param.split('/')[2];
@@ -191,12 +193,23 @@ export class AttachmentsController {
 
       if (queryResponseContentType) {
         res.setHeader('Content-Type', queryResponseContentType);
+
+        if (queryResponseContentEncoding) {
+          res.setHeader(
+            'Content-Type',
+            `${queryResponseContentType}; charset=${queryResponseContentEncoding}`,
+          );
+        }
       }
 
       if (queryResponseContentDisposition) {
         res.setHeader('Content-Disposition', queryResponseContentDisposition);
       }
 
+      if (queryResponseContentEncoding) {
+        res.setHeader('Content-Encoding', queryResponseContentEncoding);
+      }
+
       res.sendFile(file.path);
     } catch (e) {
       res.status(404).send('Not found');

packages/nocodb/src/models/PresignedUrl.ts

@@ -96,6 +96,7 @@ export default class PresignedUrl {
       filename?: string;
       preview?: boolean;
       mimetype?: string;
+      encoding?: string;
     },
     ncMeta = Noco.ncMeta,
   ) {
@@ -109,6 +110,7 @@ export default class PresignedUrl {
       expireSeconds = DEFAULT_EXPIRE_SECONDS,
       filename,
       mimetype,
+      encoding,
     } = param;
 
     const preview = param.preview
@@ -152,6 +154,14 @@ export default class PresignedUrl {
 
     if (mimetype) {
       pathParameters.ResponseContentType = mimetype;
+
+      if (encoding) {
+        pathParameters.ResponseContentType = `${mimetype}; charset=${encoding}`;
+      }
+    }
+
+    if (encoding) {
+      pathParameters.ResponseContentEncoding = encoding;
     }
 
     // append query params to the cache path

packages/nocodb/src/modules/jobs/jobs/data-export/data-export.processor.ts

@@ -1,5 +1,6 @@
 import { Readable } from 'stream';
 import path from 'path';
+import iconv from 'iconv-lite';
 import { Injectable, Logger } from '@nestjs/common';
 import moment from 'moment';
 import type { Job } from 'bull';
@@ -61,10 +62,19 @@ export class DataExportProcessor {
 
       dataStream.setEncoding('utf8');
 
+      const encodedStream =
+        options?.encoding &&
+        options.encoding !== 'utf-8' &&
+        iconv.encodingExists(options.encoding)
+          ? dataStream
+              .pipe(iconv.decodeStream('utf-8'))
+              .pipe(iconv.encodeStream(options?.encoding || 'utf-8'))
+          : dataStream;
+
       let error = null;
 
       const uploadFilePromise = (storageAdapter as any)
-        .fileCreateByStream(destPath, dataStream)
+        .fileCreateByStream(destPath, encodedStream)
         .catch((e) => {
           this.logger.error(e);
           error = e;
@@ -97,6 +107,7 @@ export class DataExportProcessor {
           expireSeconds: 3 * 60 * 60, // 3 hours
           preview: false,
           mimetype: 'text/csv',
+          encoding: options?.encoding || 'utf-8',
         });
       } else {
         url = await PresignedUrl.getSignedUrl({
@@ -105,6 +116,7 @@ export class DataExportProcessor {
           expireSeconds: 3 * 60 * 60, // 3 hours
           preview: false,
           mimetype: 'text/csv',
+          encoding: options?.encoding || 'utf-8',
         });
       }