在 apache http 客戶端中設置超時

Question

我正在使用 Apache http 客戶端 4.3.2 發送獲取請求。 我所做的是：

private final RequestConfig requestConfig = RequestConfig.custom()
        .setConnectTimeout(1000)
        .setConnectionRequestTimeout(1000)
        .setSocketTimeout(1000)
        .build();
private final HttpClient client = HttpClientBuilder.create()
        .disableAuthCaching()
        .disableAutomaticRetries()
        .disableConnectionState()
        .disableContentCompression()
        .disableCookieManagement()
        .disableRedirectHandling()
        .setDefaultRequestConfig(requestConfig)
        .build(); 

發送請求時：

HttpGet request = null;

try {
    request = new HttpGet(url);
    if (client.execute(request).getStatusLine().getStatusCode() == 200) {
        /* do some work here */
    }
} catch (Exception e) {
    Logger.error(e);
} finally {
    if (request != null) {
        request.releaseConnection();
    }
}

但是我的一些請求仍然需要很長時間才能超時。 這是異常的堆棧跟蹤：

java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:152)
    at java.net.SocketInputStream.read(SocketInputStream.java:122)
    at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:136)
    at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:152)
    at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:270)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:140)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57)
    at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:260)
    at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:161)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.http.impl.conn.CPoolProxy.invoke(CPoolProxy.java:138)
    at com.sun.proxy.$Proxy0.receiveResponseHeader(Unknown Source)
    at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:271)
    at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:123)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:254)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)

我應該設置其他超時值嗎？ 我究竟做錯了什么？

Answer 1

當我遇到這個問題時，我更改了我的請求以配置每個請求的超時。

//...
HttpRequestBase request = new HttpGet(url); //or HttpPost

RequestConfig.Builder requestConfig = RequestConfig.custom();
requestConfig.setConnectTimeout(30 * 1000);
requestConfig.setConnectionRequestTimeout(30 * 1000);
requestConfig.setSocketTimeout(30 * 1000);

request.setConfig(requestConfig.build());

CloseableHttpResponse response = client.execute(request);
//...

它工作得很好。

Answer 2

這是實現目標的代碼片段示例：

int timeout = 5;
RequestConfig config = RequestConfig.custom()
  .setConnectTimeout(timeout * 1000)
  .setConnectionRequestTimeout(timeout * 1000)
  .setSocketTimeout(timeout * 1000).build();
CloseableHttpClient client =  HttpClientBuilder.create().setDefaultRequestConfig(config).build();

這是以類型安全和可讀的方式配置所有三個超時的推薦方法。

這是完整的細節

Answer 3

您可以嘗試使用 HttpUriRequest#abort() 中止請求，請參閱https://hc.apache.org/httpcomponents-client-4.3.x/httpclient/apidocs/org/apache/http/client/methods/HttpUriRequest.html #中止%28%29 。 但是，設置一個不需要攔截的超時會更好。

Answer 4

private static final Integer TIMEOUT = 300;
private static final Integer MILLISECONDS = 1000;

RequestConfig config = 
RequestConfig.custom()
             .setConnectTimeout(TIMEOUT * MILLISECONDS)
             .setConnectionRequestTimeout(TIMEOUT * MILLISECONDS)
             .setSocketTimeout(TIMEOUT * MILLISECONDS)
             .build();

httpClientBuilder.setDefaultRequestConfig(config);
httpClientBuilder.setSSLSocketFactory(sslConnectionSocketFactory);   

我失敗了：連接超時：連接錯誤 20 秒，即使我已將時間設置為 5 分鍾。

Answer 5

.setSocketTimeout(1000)表示應用程序在讀取數據包時不活動 1 秒會導致此異常。

您可以通過在調試模式下運行代碼來測試這一點，並延遲一段時間進入下一步。

檢查您希望應用程序進行數據讀取操作的最大可能時間限制是多少，例如 50 秒（批量數據的極端情況）-> 然后更新.setSocketTimeout(50000)