在 Spring Web 應(yīng)用程序中（盡管我認(rèn)為這與 Spring 無關(guān)），我創(chuàng)建了一個(gè) REST GET 資源，它允許下載當(dāng)前的 log4j2 文件內(nèi)容，但是請求（來自瀏覽器和 cUrl）不會(huì)以webapp 部署在遠(yuǎn)程生產(chǎn)服務(wù)器上——而它們通常在我的 Windows 開發(fā)機(jī)器上結(jié)束。此外，cUrl 說還有字節(jié)要接收：* transfer closed with 3 bytes remaining to read* stopped the pause stream!* Closing connection 0curl: (18) transfer closed with 3 bytes remaining to read這是相關(guān)代碼：// ...import org.springframework.http.HttpHeaders;// ...@RestController@RequestMapping(path="/logs", produces="application/json")public class LogController {    // ...     @GetMapping(path="/{appenderName}/contents", produces="text/plain")    public void download(@PathVariable String appenderName, HttpServletResponse response) {        // ...        org.apache.logging.log4j.Logger rootLogger = LogManager.getRootLogger();        if(rootLogger instanceof Logger) {            Logger l = (Logger) rootLogger;            if(l.getAppenders().containsKey(appenderName)) {                Appender appender = l.getAppenders().get(appenderName);                if(appender instanceof FileAppender) {                    ((FileAppender) appender).getManager().flush();                    final File f = new File(((FileAppender) appender).getFileName());                    response.setHeader(HttpHeaders.CONTENT_TYPE, "text/plain");                    response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + f.getName() + "\"");                    Path tempCopy = Files.createTempFile("log-", null);                    Files.copy(f.toPath(), tempCopy, StandardCopyOption.REPLACE_EXISTING);我認(rèn)為問題出在Content-length標(biāo)題上：在 Linux (Ubuntu) 服務(wù)器上，只有當(dāng)我減去3文件長度時(shí)才有效：response.setHeader(HttpHeaders.CONTENT_LENGTH, String.valueOf(tempCopy.toFile().length() - 3));我嘗試在下載前將原始文件復(fù)制到臨時(shí)文件，但似乎沒有幫助。當(dāng)然，如果我不發(fā)送任何Content-Length標(biāo)題，一切都很好。