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[英]java.io.IOException: Premature EOF while reading serialized object
[英]java.io.IOException: Premature EOF when reading Transfer-Encoding: chunked http response
我編寫了一個小的命令行程序來讀取網頁並將響應正文打印到終端。
這對於大多數站點都適用,但是從以下URL讀取分塊響應時: http : //www.pampers.co.uk/home,我得到以下追溯信息:
java.io.IOException: Premature EOF
at sun.net.www.http.ChunkedInputStream.readAheadBlocking(ChunkedInputStream.java:538)
at sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:582)
at sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:669)
at java.io.FilterInputStream.read(FilterInputStream.java:116)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:2668)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at java.io.Reader.read(Reader.java:123)
at HttpPageReader.main(HttpPageReader.java:44)`
我已經對字符集進行了硬編碼,以匹配此頁面上的響應。 我應該采取什么步驟來調試此問題? 我以為這不是Java錯誤,而是Web服務器返回的內容有問題-但是,我已經在Web瀏覽器中查看了該頁面,並使用curl進行了下載,但都沒有問題。
代碼如下,應易於復制和粘貼並獨立運行:
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.logging.Logger;
public class HttpPageReader
{
private final static Logger logger = Logger.getLogger(HttpPageReader.class.getName());
private static final int SECOND_IN_MILLI_SECONDS = 1000;
private static final int TIME_OUT_MILLI_SECONDS = 10 * SECOND_IN_MILLI_SECONDS;
public static void main(String[] args)
{
if ( args.length != 1)
{
logger.warning("Please provide a url to download");
System.exit(1);
}
logger.info("Downloading url " + args[0] + "...");
try
{
URL url = new URL(args[0]);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setRequestProperty("User-Agent", "My User Agent");
httpConn.setRequestProperty("Accept", "*/*");
httpConn.setConnectTimeout(TIME_OUT_MILLI_SECONDS);
httpConn.setReadTimeout(TIME_OUT_MILLI_SECONDS);
InputStreamReader inputStreamReader = new InputStreamReader(httpConn.getInputStream(), "utf-8");
char chars[] = new char[1000];
int numRead = inputStreamReader.read(chars);
StringBuffer stringBuffer = new StringBuffer();
while (numRead != -1)
{
stringBuffer.append(new String(chars, 0, numRead));
numRead = inputStreamReader.read(chars);
}
logger.info("done");
logger.info(stringBuffer.toString());
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
更新:按照建議使用IOUtils.toString(httpConn.getInputStream(),“ utf-8”)可以得到幾乎相同的回溯-因此問題仍然存在,我該如何調試此問題?
給出:
java.io.IOException: Premature EOF
at sun.net.www.http.ChunkedInputStream.readAheadBlocking(ChunkedInputStream.java:538)
at sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:582)
at sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:669)
at java.io.FilterInputStream.read(FilterInputStream.java:116)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:2668)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at java.io.Reader.read(Reader.java:123)
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1928)
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1907)
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1884)
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1834)
at org.apache.commons.io.IOUtils.toString(IOUtils.java:705)
at org.apache.commons.io.IOUtils.toString(IOUtils.java:730)
at HttpPageReader.main(HttpPageReader.java:40)
試試這個.....這樣更容易...記住不要在程序中重載n nos,直到您真正需要它們為止。
只要復制粘貼此代碼,然后嘗試...然后嘗試以自己的方式對其進行修改即可。...祝您好運!
package com.my;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Scanner;
public class TestSrc {
public static void main(String[] args) {
try {
URL url = new URL("http://www.pampers.co.uk/home");
try {
InputStream i = url.openStream();
Scanner scan = new Scanner(i);
while (scan.hasNextLine()) {
System.out.println(scan.nextLine());
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}
您是否嘗試過使用IOUtils.toString(inputStream)
?
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