Java 如何使用apache http客户端库4.1设置自定义用户代理?
如何使HTTPClient使用自定义用户代理头 以下代码提交空的用户代理。我错过了什么Java 如何使用apache http客户端库4.1设置自定义用户代理?,java,user-agent,apache-httpclient-4.x,Java,User Agent,Apache Httpclient 4.x,如何使HTTPClient使用自定义用户代理头 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 o
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);
}
}
}
import java.io.IOException;
导入org.apache.http.HttpEntity;
导入org.apache.http.HttpResponse;
导入org.apache.http.client.ClientProtocolException;
导入org.apache.http.client.HttpClient;
导入org.apache.http.client.methods.HttpGet;
导入org.apache.http.impl.client.DefaultHttpClient;
导入org.apache.http.params.CoreProtocolPNames;
导入org.apache.http.protocol.BasicHttpContext;
导入org.apache.http.protocol.HttpContext;
导入org.apache.http.util.EntityUtils;
公共类TestHTTP{
公共静态void main(字符串[]args)抛出ClientProtocolException,IOException{
HttpGet请求=新建HttpGet(“http://tool.keepmeapi.com/echo");
HttpContext HTTP_CONTEXT=new BasicHttpContext();
HTTP_CONTEXT.setAttribute(CoreProtocolPNames.USER_代理,“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=新的DefaultHttpClient();
HttpResponse response=httpClient.execute(请求,HTTP_上下文);
if(response.getStatusLine().getStatusCode()<200 | | response.getStatusLine().getStatusCode()>=400){
抛出新IOException(“获得错误响应,错误代码=“+response.getStatusLine().getStatusCode());
}
HttpEntity=response.getEntity();
如果(实体!=null){
System.out.println(EntityUtils.toString(entity));
EntityUtils.consume(实体);
}
}
}
注意:该解决方案适用于使用旧的httpcomponents 4.2及之前版本的用户
线路
request.setHeader(“用户代理”、“MySuperUserAgent”)代码>
他失踪了。添加它并享受。注意:从httpcomponents 4.3开始,此解决方案已被弃用
您还可以设置全局用户代理值,而不是每个请求:
String userAgent = "NewUseAgent/1.0";
HttpClient httpClient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, userAgent);
对于httpcomponents 4.3,应使用客户端生成器设置用户代理:
HttpClient httpClient = HttpClients.custom()
.setUserAgent("my UserAgent 5.0")
.build();
httpClient.execute(new HttpGet("http://www.google.de"));
这么简单…:)我想知道CoreProtocolPNames.USER_代理的作用是什么?我不知道。我没有这个类,但它可能只是一个常量“用户代理”?@AlexR:CoreProtocolPNames.User_代理应该与org.apache.http.params.HttpParams一起使用,以配置您的httpClient,在您的情况下,它是DefaultHttpClient。因此,您可以将用户代理作为DefaultHttpClient构造函数的第二个参数传递,或通过serDefaultHttpParams传递。对于使用httpcomponents 4.3及以上版本的用户,请向下滚动至@MrSpock答案。您可以在HttpClient上设置用户代理。我使用HTTP.user\u agent
作为参数名。虽然不确定哪一个是首选。CoreProtocolPNames.USER\u AGENT
是唯一可以工作的。HTTP.USER_代理只是HTTP头本身的名称,而不是我们发送给httpclient的属性的名称。Apache的文档称CoreProtocolPNames.USER_代理已被弃用。应该用什么来代替?您应该使用HttpProtocolParams.setUserAgentI尝试在不同版本的ApacheLibrary中更改参数,但从未奏效。更好的方法是使用“yourrequest.addHeader”(“用户代理”,“YourApp/x.x”)”