现在我正在尝试从使用 302 将获取请求重定向到下载资源的服务器下载文件。好吧,当我使用下面的代码下载文件时,服务器响应失败,我认为服务器知道我不使用浏览器下载文件。当我使用浏览器时,它工作正常并且文件是正确的。
你能告诉我代码中的问题在哪里吗?谢谢。
这是我的代码:
@SuppressWarnings("deprecation")
public static void downloadFile(String url, String fileName, String page) throws InterruptedException, IOException {
httpClient = new DefaultHttpClient(cm);
// set timeout
HttpParams httpParams = httpClient.getParams();
HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_SECONDS * 1000);
HttpEntity entity = null;
HttpGet httpGet = new HttpGet(url);
Random r=new java.util.Random(UAS.length);
//Cookie:AJSTAT_ok_times=7
String ua = UAS[r.nextInt(UAS.length)];
httpGet.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31 AlexaToolbar/alxg-3.1");
httpGet.setHeader("Accept-Charset", "UTF-8,utf-8;q=0.7,*;q=0.3");
httpGet.setHeader("Accept-Encoding", "deflate,sdch");
httpGet.setHeader("Accept-Language", "zh-CN,zh;q=0.8");
httpGet.setHeader("Cache-Control", "max-age=0");
httpGet.setHeader("Connection", "keep-alive");
httpGet.setHeader("Cookie", "AJSTAT_ok_times=7");
httpGet.setHeader("Host", "www.test.com");
httpGet.setHeader("Cookie", "AJSTAT_ok_times=7");
try {
HttpContext context = new BasicHttpContext();
HttpResponse remoteResponse = httpClient.execute(httpGet, context);
entity = remoteResponse.getEntity();
if (remoteResponse.getStatusLine().getStatusCode() != 200) {
System.out.println(remoteResponse.getStatusLine().getStatusCode());
}
} catch (Exception e) {
httpGet.abort();
e.printStackTrace();
return;
}
// 404返回
if (entity == null) {
System.out.println("404");
return;
}
File file = new File(fileOutPutDIR + page + "/" + fileName + ".rar");
File parent = file.getParentFile();
if (parent.exists() || parent.mkdirs()) {
// ...
} else {
throw new IOException("Failed to create output directory " + parent);
}
System.out.println("downloading..." + file.getName());
InputStream input = entity.getContent();
try {
FileUtils.copyInputStreamToFile(input, file);
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
IOUtils.closeQuietly(input);
}
}
起居室:
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.2.3</version>
</dependency>