下载超过2G多大文件时，杀进程后，再次下载无法断点续传。

weiwdev commented 1 year ago

OkDownload Version

v1.0.7

Problem Describe

使用OKdownload下载一个大文件（如2.4G，超出int范围，为long型）, 下载一部分后，退出app，并杀掉该进程；重新进入app下载，此时下载进度从0开始。小文件下载，断点续传正常，没有该问题。

Cause

第二次重新进入app下载时，新建BreakpointStoreOnSQLite时，会判断BlockInfoRow的startOffset, contentLength, currentOffset等字段，如果小于0，则抛出异常，无法使用SQLite里的断点信息。大文件下载时，contentLength字段会被写入long型的数据（超出int范围），第二次下载读取BlockInfoRow的contentLength时，仍然是按int型读取，导致读取到负值，加载BreakpointStoreOnSQLite、断点信息失败。

相关代码如下：startOffset、contentLength、currentOffset是long型，确按int读取。 public class BlockInfoRow { private final int breakpointId;

private final long startOffset;
private final long contentLength;
private final long currentOffset;

public BlockInfoRow(Cursor cursor) {
    this.breakpointId = cursor.getInt(cursor.getColumnIndex(HOST_ID));
    this.startOffset = cursor.getInt(cursor.getColumnIndex(START_OFFSET));
    this.contentLength = cursor.getInt(cursor.getColumnIndex(CONTENT_LENGTH));
    this.currentOffset = cursor.getInt(cursor.getColumnIndex(CURRENT_OFFSET));
}

Log

在okdownload-breakpoint-sqlite增加部分调试log，打印如下： --------- beginning of main --------- beginning of system 10-11 17:41:28.911 3160 3160 E debug : ##return BreakpointStoreOnSQLite## 10-11 17:41:29.745 3332 3332 E debug : ##return BreakpointStoreOnSQLite## 10-11 17:41:29.989 3238 3238 E debug : ##return BreakpointStoreOnSQLite## 10-11 17:41:31.607 3613 3613 E debug : ##return BreakpointStoreOnSQLite## 10-11 17:41:37.620 3160 3877 E debug : ##get BreakpointInfo,task:1 10-11 17:41:37.627 3160 3877 E debug : ##get BreakpointInfo,task:1 10-11 17:41:37.627 3160 3877 E debug : ##get BreakpointInfo,task:1 10-11 17:41:37.628 3160 3881 E debug : ##get BreakpointInfo,task:1 10-11 17:41:39.130 3160 3287 E debug : ##get BreakpointInfo,task:1 10-11 17:41:39.134 3160 3287 E debug : insert blockCount success:1current_offset=4096 start_offset=0 content_length=2568924379 breakpoint_id=1 block_index=0 10-11 17:41:39.957 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:756868 10-11 17:41:41.985 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:1794048 10-11 17:41:44.004 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:1773568 10-11 17:41:44.889 3160 3160 E debug : ##get BreakpointInfo,task:1 10-11 17:41:46.035 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:2158592 10-11 17:41:48.073 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:2568192 10-11 17:41:50.117 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:2977792 10-11 17:41:52.166 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:3387392 10-11 17:41:53.477 3160 3160 E debug : ##get BreakpointInfo,task:1 10-11 17:41:54.196 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:3795208 10-11 17:41:56.241 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:3899392 10-11 17:41:57.049 3160 3160 E debug : ##get BreakpointInfo,task:1 10-11 17:41:57.077 3160 3887 E debug : BreakpointStoreOnSQLite onSyncToFilesystemSuccess, blockIndex:0, increaseLength:1949696

杀进程后，重新启动下载： 10-11 17:42:07.654 4868 4868 E debug : ##return BreakpointStoreOnSQLite## 10-11 17:42:07.657 4868 4868 E debug : ###BlockInfoRow startOffset, contentLength, currentOffset###0,-1726042917,25064844 10-11 17:42:07.659 4868 4868 E debug : ##create BreakpointStoreOnSQLite fail InvocationTargetException##java.lang.reflect.InvocationTargetException 10-11 17:42:07.659 4868 4868 E debug : ##return BreakpointStoreOnCache## 10-11 17:42:08.380 5007 5007 E debug : ##return BreakpointStoreOnSQLite## 10-11 17:42:08.390 5007 5007 E debug : ###BlockInfoRow startOffset, contentLength, currentOffset###0,-1726042917,25064844 10-11 17:42:08.392 5007 5007 E debug : ##create BreakpointStoreOnSQLite fail InvocationTargetException##java.lang.reflect.InvocationTargetException 10-11 17:42:08.392 5007 5007 E debug : ##return BreakpointStoreOnCache##

tianshaokai commented 1 year ago

@weiwdev 可以发一下下载文件链接吗

wjzabc commented 1 year ago

遇到同样的大文件杀进程无法续传问题

lingochamp / okdownload