如何设置自定义用户代理与Apache HTTP客户端库4.1?
问题描述:
如何使HTTPClient使用自定义User-Agent头?如何设置自定义用户代理与Apache HTTP客户端库4.1?
以下代码提交空的用户代理。我错过了什么?
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
public class TestHTTP {
public static void main(String[] args) throws ClientProtocolException, IOException {
HttpGet request = new HttpGet("http://tool.keepmeapi.com/echo");
HttpContext HTTP_CONTEXT = new BasicHttpContext();
HTTP_CONTEXT.setAttribute(CoreProtocolPNames.USER_AGENT, "Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101206 Ubuntu/10.10 (maverick) Firefox/3.6.13");
request.setHeader("Referer", "http://www.google.com");
HttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute(request, HTTP_CONTEXT);
if (response.getStatusLine().getStatusCode() < 200 || response.getStatusLine().getStatusCode() >= 400) {
throw new IOException("Got bad response, error code = " + response.getStatusLine().getStatusCode());
}
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println(EntityUtils.toString(entity));
EntityUtils.consume(entity);
}
}
}
答
线
request.setHeader("User-Agent", "MySuperUserAgent");
丢失。添加并享受。
答
您还可以设置一个全球性的用户代理值,而不是每个请求:
String userAgent = "NewUseAgent/1.0";
HttpClient httpClient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, userAgent);
答
随着httpcomponents 4.3,你应该使用客户端生成器来设置用户代理:
HttpClient httpClient = HttpClients.custom()
.setUserAgent("my UserAgent 5.0")
.build();
httpClient.execute(new HttpGet("http://www.google.de"));
这么简单.. 。:)我不知道CoreProtocolPNames.USER_AGENT是什么? – 2011-02-17 10:26:18
我不知道。我没有这个班,但可能它只是一个不断的“用户代理”? – AlexR 2011-02-17 10:29:02