[英]Java okHttp reuse keep-alive connection
如何通過okHttp重用http keep-alive連接?
我的代碼示例:
public class MainWithOkHttp {
static OkHttpClient _client = new OkHttpClient();
public static void main(String[] args) {
...
query1();
...
// in this request
Request _request = new Request.Builder()
.url("...")
.addHeader("connection", "keep-alive")
.addHeader("cookie", _cookie)
.post(postParams)
.build();
// in this request my previous session is closed, why?
// my previous session = session created in query1 method
Response _response = _client.newCall(_request).execute();
...
}
...
private static void query1() {
...
Request request = new Request.Builder()
.url("...")
.addHeader("connection", "keep-alive")
.addHeader("cookie", _cookie)
.get()
.build();
Response _response = _client.newCall(request).execute();
...
}
...
}
所以,我正在調用query1()
方法。 在此方法中,打開了連接,在服務器端創建了會話,並且收到了帶有sessionId的cookie。
但是,當我向服務器執行另一個查詢時 - 我之前的連接未被使用,服務器上的會話已經關閉。 服務器中的會話生存時間不小,所以問題不在於終身。
PS:我從服務器獲取驗證碼並識別驗證碼,然后使用驗證碼對服務器執行查詢。 但是服務器端的驗證碼無法識別,因為會話已經關閉,驗證碼存儲在會話中。
最終,以下代碼對我有用:
public class Main {
static OkHttpClient _client = new OkHttpClient();
public static void main(String[] args) throws IOException {
performQuery();
}
private static void performQuery() throws IOException {
Request firstRequest = new Request.Builder()
.url("http://localhost/test/index.php")
.get()
.build();
Response firstResponse = _client.newCall(firstRequest).execute();
Request.Builder requestBuilder = new Request.Builder()
.url("http://localhost/test/index.php");
Headers headers = firstResponse.headers();
requestBuilder = requestBuilder.addHeader("Cookie", headers.get("Set-Cookie"));
Request secondRequest = requestBuilder.get().build();
Response secondResponse = _client.newCall(secondRequest).execute();
}
}
看來,問題出在_cookie
對象上。
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