1、引入 OKHTTP 依赖
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>4.12.0</version>
</dependency>
2、配置 OkHttpClient 客户端实例
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.concurrent.TimeUnit;
@Configuration
public class OkHttpConfiguration {
@Bean
public okhttp3.OkHttpClient okHttpClient() {
final okhttp3.Dispatcher dispatcher = new okhttp3.Dispatcher();
dispatcher.setMaxRequests(Integer.MAX_VALUE);
dispatcher.setMaxRequestsPerHost(Integer.MAX_VALUE);
return new okhttp3.OkHttpClient.Builder()
.connectionPool(new okhttp3.ConnectionPool(200, 5L, TimeUnit.MINUTES))
.dispatcher(dispatcher)
.connectTimeout(2, TimeUnit.SECONDS)
.readTimeout(3, TimeUnit.SECONDS)
.build();
}
}
3、请求调用
import okhttp3.*;
import org.jetbrains.annotations.NotNull;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.io.IOException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
@RestController
public class IndexController {
private final OkHttpClient okHttpClient;
public IndexController(OkHttpClient okHttpClient) {
this.okHttpClient = okHttpClient;
}
@GetMapping(path = "index", produces = MediaType.APPLICATION_JSON_VALUE)
public Map<String, Object> execute(String arg) {
final Map<String, Object> result = new HashMap<>(3);
final Request request = new Request.Builder()
.url("http://x.y.z/ivr/index")
.post((new FormBody.Builder()).build())
.build();
final CompletableFuture<String> future = new CompletableFuture<>();
this.okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
future.completeExceptionally(e);
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
if (response.isSuccessful()) {
future.complete(response.body().string());
} else {
future.completeExceptionally(new IOException("Unexpected code " + response));
}
}
});
result.put("timestamp", LocalDateTime.now());
result.put("arg", arg);
final String futureResult;
try {
futureResult = future.get();
result.put("txt", futureResult);
} catch (InterruptedException | ExecutionException e) {
result.put("txt", e.getMessage());
}
return result;
}
}
