using System;
using System.Net;
using System.Net.Http;
using System.Drawing;
using System.IO;
using System.Threading.Tasks;
namespace OxyApi
{
class Program
{
static async Task Main(string[] args)
{
var webProxy = new WebProxy
{
Address = new Uri("https://unblock.oxylabs.io:60000"),
BypassProxyOnLocal = false,
UseDefaultCredentials = false,
Credentials = new NetworkCredential(
userName: "YOUR_USERNAME",
password: "YOUR_PASSWORD"
)
};
var httpClientHandler = new HttpClientHandler
{
Proxy = webProxy,
};
// We recommend accepting our certificate instead of allowing insecure (http) traffic
httpClientHandler.ClientCertificateOptions = ClientCertificateOption.Manual;
httpClientHandler.ServerCertificateCustomValidationCallback =
(httpRequestMessage, cert, cetChain, policyErrors) =>
{
return true;
};
var client = new HttpClient(handler: httpClientHandler, disposeHandler: true);
// 添加自定义标头
client.DefaultRequestHeaders.Add("X-Oxylabs-Render", "png");
Uri baseUri = new Uri("https://youtube.com");
client.BaseAddress = baseUri;
var requestMessage = new HttpRequestMessage(HttpMethod.Get, "");
var response = await client.SendAsync(requestMessage);
byte[] bytes = await response.Content.ReadAsByteArrayAsync();
using (Image image = Image.FromStream(new MemoryStream(bytes)))
{
image.Save("rendered_page.png");
}
}
}
}
{% endtab %}
{% tab title="Java" %}
```java
package org.example;
import okhttp3.Authenticator;
import okhttp3.Credentials;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import javax.net.ssl.*;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.util.concurrent.TimeUnit;
import java.io.File;
import org.apache.commons.io.FileUtils;
public class App implements Runnable
{
private static final String AUTHORIZATION_HEADER = "Proxy-Authorization";
public static final String USERNAME = "YOUR_USERNAME";
public static final String PASSWORD = "YOUR_PASSWORD";
public void run() {
Authenticator authenticator = (route, response) -> {
String credential = Credentials.basic(USERNAME, PASSWORD);
return response
.request()
.newBuilder()
.header(AUTHORIZATION_HEADER, credential)
.build();
};
OkHttpClient.Builder builder = new OkHttpClient.Builder()
.readTimeout(180, TimeUnit.SECONDS)
.writeTimeout(180, TimeUnit.SECONDS);
// We recommend accepting our certificate instead of allowing insecure (http) traffic
this.disableSSLCertificateChecking(builder);
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("unblock.oxylabs.io", 60000));
OkHttpClient client = builder
.proxy(proxy)
.proxyAuthenticator(authenticator)
.build();
var request = new Request.Builder()
.url("https://youtube.com")
.addHeader("X-Oxylabs-Render", "png")
.get()
.build();
try (var response = client.newCall(request).execute()) {
assert response.body() != null;
okhttp3.ResponseBody body = response.body();
if (body != null) {
byte[] bytes = body.bytes();
FileUtils.writeByteArrayToFile(new File("rendered_page.png"), bytes);
}
} catch (Exception exception) {
exception.printStackTrace();
System.exit(1);
}
System.exit(0);
}
private void disableSSLCertificateChecking(OkHttpClient.Builder builder) {
TrustManager[] trustManagers = new TrustManager[]{
new X509TrustManager() {
@Override
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return new java.security.cert.X509Certificate[]{};
}
@Override
public void checkServerTrusted(java.security.cert.X509Certificate[] x509Certificates, String authType) {
}
@Override
public void checkClientTrusted(java.security.cert.X509Certificate[] x509Certificates, String authType) {
}
}
};
try {
HttpsURLConnection.setDefaultHostnameVerifier((s, sslSession) -> true);
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, trustManagers, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
builder.sslSocketFactory(sslContext.getSocketFactory(), (X509TrustManager) trustManagers[0]);
} catch (Exception exception) {
exception.printStackTrace();
System.exit(1);
}
builder.hostnameVerifier((hostname, session) -> true);
}
public static void main(String[] args) {
new Thread(new App()).start();
}
}
```
{% endtab %}
{% endtabs %}
响应将包含图像的原始字节，可保存为 PNG 格式，并像下面的示例一样打开：
作为 PNG 格式截图的 Youtube 页面示例
## 强制渲染特定页面
为了成功抓取，某些特定域名的页面类型由于其动态内容需要渲染。即使用户未明确设置，我们的系统也会自动对这些页面强制启用渲染。
{% hint style="warning" %}
请注意，渲染任务相比非渲染任务会消耗更多流量。
{% endhint %}
我们希望用户在抓取以下页面时充分了解这一点：
{% file src="/files/8f476b13b3dc64fd9f5984624acdc541e11ee2ce" %}
这种方式提供尽可能好的抓取体验，确保这些高难度页面的数据准确性和可靠性。
如果您想禁用渲染，请发送不带值的 render 标头
```
X-oxylabs-render:
```
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://developers.oxylabs.io/products/cn/web-unblocker/custom-browser-instructions/javascript-rendering.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.