🐛 Fix reading of local file header

src/interfaces/ISsnFileEntry.ts

@@ -30,7 +30,7 @@ interface ISsnFileEntry {
   decryptionKeys: [number, number, number] | undefined;
   /** Number of the disk where the file is stored (0=.z01, 1=.z02 etc.) */
   diskNumberStart: number;
-  /** Offset */
+  /** Offset into the disk to where the local file header starts. */
   offset: number;
 }
 

src/ssn/streams/getFileFromDisks.ts

@@ -12,7 +12,7 @@ interface IGetFileFromDisksOptions {
 }
 
 function getStream(disks: string[], index: number, offset: number, length: number = Infinity) {
-  return fs.createReadStream(disks[index], { start: offset, end: offset + length });
+  return fs.createReadStream(disks[index], { start: offset, end: offset + length - 1 });
 }
 
 /** Takes a list of ReadableStreams (the disks), as well as the offset and length, and returns a stream for just one file. */

src/ssn/streams/readLocalFileHeader.ts

@@ -39,8 +39,13 @@ export default async function readLocalFileHeader(inputStream: stream.Readable):
   const additionalLength = localFilenameSize + localExtraSize;
   if (additionalLength > 0) {
     await waitReadableLength(inputStream, additionalLength);
+    const tmpChunk = inputStream.read(additionalLength);
+    if (tmpChunk === null) {
+      //need to wait until data is ready for reading
+    await waitReadableLength(inputStream, additionalLength);
     inputStream.read(additionalLength);
     }
+  }
 
   return 30 + additionalLength;
 }