下载文件有的出现412错误

Nobody has claimed this yet.

2021-05-20 16:57:36.301 24258-24258/com.apppubs.U1621255999194 E/下载出错: Connection failed with request[{If-Match=["7931-5bd13d31645e7-gzip"], Range=[bytes=0-], User-Agent=[FileDownloader/1.7.7]}] response[{null=[HTTP/1.1 412 Precondition Failed], Accept-Ranges=[bytes], Connection=[Keep-Alive], Content-Length=[0], Content-Type=[application/vnd.openxmlformats-officedocument.wordprocessingml.document], Date=[Thu, 20 May 2021 08:57:36 GMT], ETag=["7931-5bd13d31645e7"], Keep-Alive=[timeout=5, max=99], Last-Modified=[Tue, 09 Mar 2021 05:28:47 GMT], MS-Author-Via=[DAV], Server=[Apache], X-Android-Received-Millis=[1621501056267], X-Android-Response-Source=[NETWORK 412], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1621501056240], X-FRAME-OPTIONS=[SAMEORIGIN], X-XSS-Protection=[1; mode=block]}] http-state[412] on task[-852055445--1], which is changed after verify connection, so please try again.

请问该怎么解决？

The issue provides an Android FileDownloader log showing an HTTP 412 response caused by an If-Match and ETag mismatch, but names no source file or test. Start by tracing the request and connection-verification path that handles this response. Done means reproducing the failed download and establishing a verified resolution for the 412 case.

Written by the indexing model from the issue text.