标签: httpconnection

我[目前正在使用这样的东西

 HttpURLConnection con = (HttpURLConnection) u.openConnection ();
     con.setDoInput(true);
     con.setRequestMethod("POST");

     con.setDoInput (true);
     con.setDoOutput (true);
     con.setRequestProperty ("Content-Type", "application/x-www-form-urlencoded");

        out = new DataOutputStream(con.getOutputStream());
     String content = "username=" + URLEncoder.encode ("bob")
      + "&password=" + URLEncoder.encode ("smith");
     System.out.println("\n" + "sending form to HTTP server ...");
     out.writeBytes (content);
     out.flush ();
     out.close ();

     con.connect();

有了这个,我设法将一些数据传递给我的服务器.我现在正在徘徊的是这样可以发送多少钱？

我希望能够发送一些xml文件(100~200行),想知道我能不能这样做？

贾森

我正在开发Android设备的应用程序(2.2).我正在尝试获取一个html页面.我使用的java代码似乎工作,所以我可以获得我想要的页面,但有时应用程序崩溃,我得到例外:"没有对等证书".发生这种情况时,如果我等待一个小时或者我改变网络,它会正常工作.有人知道如何解决这个问题吗？该网站是https://stud.infostud.uniroma1.it/Sest/Log/

我真的很抱歉我的英语,我希望你能理解!

虽然我使用GZIPInputStream来压缩来自Internet的字节,但程序运行错误如下:

05-08 17:37:02.465: W/System.err(744): java.io.IOException: unknown format (magic number 213c)
05-08 17:37:02.465: W/System.err(744):  at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:84)
05-08 17:37:02.465: W/System.err(744):  at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:64)
05-08 17:37:02.475: W/System.err(744):  at com.Android.Sample.TestActivity.onCreate(TestActivity.java:54)
05-08 17:37:02.475: W/System.err(744):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-08 17:37:02.475: W/System.err(744):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
05-08 17:37:02.475: W/System.err(744):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-08 17:37:02.475: W/System.err(744):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-08 17:37:02.475: W/System.err(744):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-08 17:37:02.475: W/System.err(744):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-08 17:37:02.475: W/System.err(744):  at android.os.Looper.loop(Looper.java:123)
05-08 17:37:02.475: W/System.err(744):  at android.app.ActivityThread.main(ActivityThread.java:3683)
05-08 17:37:02.475: W/System.err(744):  at java.lang.reflect.Method.invokeNative(Native Method)
05-08 17:37:02.475: W/System.err(744):  at java.lang.reflect.Method.invoke(Method.java:507)
05-08 17:37:02.475: W/System.err(744):  at …

我一直试图解决这个问题几个小时了.我已经找到了答案,但我找不到答案.我以前从未打扰过这个问题,这是我第一次提出问题.基本上我正在做的是为了组织目的打破我的编码.下面的代码片段工作得很好,但是当我把它拿到另一个类时,urlConnect(); 连接就好了.我在下面标记了它.

public String downloadUrl(String strUrl) throws IOException{
    String data = "";
    InputStream iStream = null;
    HttpURLConnection urlConnection = null;

    try{
        URL url = new URL(strUrl);
        String line = "";

        // Creating an http connection to communicate with url 
        urlConnection = (HttpURLConnection) url.openConnection();

        /* Connecting to url */
        urlConnection.connect(); <-------------------------works in this snippet

        /* Reading data from url */
        iStream = urlConnection.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
        StringBuffer sb  = new StringBuffer();

        while((line = br.readLine()) != null){
            sb.append(line);
        } …

我想通过POST方法将xml字符串传递给URL.

我试过下面的代码片段,但它没有返回任何内容

disableCertificateValidation();
String url = "https://..url";   //https

Properties sysProps = System.getProperties();
sysProps.put("proxySet", "true");
sysProps.put("proxyHost", "1.2.3.4");
sysProps.put("proxyPort", "80");

Authenticator authenticator = new Authenticator() {
    public PasswordAuthentication getPasswordAuthentication() {
        return (new PasswordAuthentication("userid",
                "password".toCharArray()));
    }
};
Authenticator.setDefault(authenticator);


 String xml = ---xml string;            


URL urll;
HttpURLConnection connection = null;
try {
    // Create connection
    urll = new URL(url);
    connection = (HttpURLConnection) urll.openConnection();
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type",
            "application/x-www-form-urlencoded");

    connection.setRequestProperty("Content-Length", ""
            + Integer.toString(xml.getBytes().length));
    connection.setRequestProperty("Content-Language", "en-US");

    connection.setUseCaches(false);
    connection.setDoInput(true);
    connection.setDoOutput(true);

    // Send request
    DataOutputStream wr = new DataOutputStream(connection
            .getOutputStream()); …

我尝试编写一个简单的脚本，每小时检查一次网站，并在发现有空时向我发送电子邮件。

我认为每隔一小时执行此操作不会引发任何问题，但出现以下错误：

MaxRetryError: HTTPConnectionPool(host='127.0.0.1', port=60745): Max retries exceeded with url: /session/900f45d6c8c800f2a8ebcf43daa05b69/url (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fa42c261c10>: Failed to establish a new connection: [Errno 61] Connection refused'))

这是我的代码：

import schedule
import time
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from notification import *
#script i have to send an email (works fine)

PATH = "mypath"
# i have the path where there drivers are

chrome_options = Options()
chrome_options.add_argument("--headless")
chrome_options.add_argument("--window-size=1920x1080")
# to not open the browser

driver = webdriver.Chrome(options=chrome_options, executable_path=PATH) …

如果MaxIdleConnsPerHost设置为较高的数字，比如说 1000，打开的连接数仍将取决于其他主机，对吗？我的意思是，只要其他主机没有关闭这些连接，允许与同一主机的 1000 个空闲连接将导致打开 1000 个连接？

那么，有效地将此值设置为一个较高的数字，会导致永远不会关闭连接，而是等待其他主机关闭吗？我是否正确解释了这一点？

我正在尝试使用HTTPConnection(2.7.8)发出请求,我已将超时设置为10 HTTPConnection(host, timeout=10).但是,HTTPConnection.request()10秒后似乎没有超时.事实上,HTTPConnection.timeout似乎甚至没有被阅读HTTPConnection.request()(它只是通过阅读HTTPConnection.connect().我的理解是正确的吗？timeout只适用于connect()而不是request()吗？有没有办法超时request()？

更新:

我想我已经进一步缩小了这个问题:如果我不提供该方案,它将不会尊重套接字超时.如果提供了该方案,即完整的URL http://google.com:22222,则它会相应地超时.我想知道为什么该计划的存在应该有所作为.也就是说,以下不尊重超时

    socket.setdefaulttimeout(3)
    conn = HTTPConnection('google.com:22222')
    conn.timeout = 3
    conn.request('GET', '')

然而,这样做:

    socket.setdefaulttimeout(3)
    conn = HTTPConnection('http://google.com:22222')
    conn.timeout = 3
    conn.request('GET', '')

但是,它不会发生在所有域中.

谢谢

ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();


                        nameValuePairs.add(new BasicNameValuePair(
                                "product_name", product_name));
                        nameValuePairs.add(new BasicNameValuePair("brand",
                                brand_product));
                        nameValuePairs.add(new BasicNameValuePair("reference_price",
                                mrp_product));
                        nameValuePairs.add(new BasicNameValuePair("model",
                                model_product));

                        HttpPost httppost = new HttpPost(
                                "http://10.0.2.2/wic3/wic2/product/doadd");

                        httppost.setEntity(new UrlEncodedFormEntity(
                                nameValuePairs));
                        ResponseHandler<String> responseHandler = new BasicResponseHandler();
                        String response = SignUpActivity.httpclient.execute(
                                httppost, responseHandler);
                        Log.d("response", response);

                        Intent intent = new Intent(ShareProductActivity.this, ShareActivity.class);
                        startActivity(intent);

这给了我一个例外:

05-07 14:56:19.105: D/exception(1137): org.apache.http.conn.HttpHostConnectException: Connection to http://localhost refused

我搜索了这个,每个人都说改变127.0.0.1了10.0.2.2,但我没有使用127.0.0.1 我想问题就在这一步:

String response = SignUpActivity.httpclient.execute(httppost, responseHandler);

我正在尝试检测是否确实存在互联网连接并且网站可以访问.我有一个广播接收器,在接收时运行以下方法:

  public boolean hasInternetNow() {
           Thread checkinternet = new Thread(new Runnable() {
               @Override
               public void run() {
                 try {
                      try {
                            ConnectivityManager cm = (ConnectivityManager) myContext.getSystemService(Context.CONNECTIVITY_SERVICE); 
                            if (cm.getActiveNetworkInfo().isConnectedOrConnecting()) {
                                URL url = new URL("http://www.google.com");
                                HttpURLConnection urlc = (HttpURLConnection) url .openConnection();
                                urlc.setRequestProperty("User-Agent", "test");
                                urlc.setRequestProperty("Connection", "close"); 
                                urlc.setConnectTimeout(1000); // mTimeout is in seconds
                                urlc.connect();
                                if (urlc.getResponseCode() == 200) {
                                    setinternetDetected(true);
                                     } else {
                                    setinternetDetected(false);
                                  }
                            }
                        } catch (IOException e) {
                            e.printStackTrace();
                            setinternetDetected(false);
                        } catch (NullPointerException e){
                            e.printStackTrace();
                            setinternetDetected(false);
                        }


                 } catch (Exception …

我在Spring WS 2.1.0上有一个Web服务.Web服务在Tomcat 7上运行,并使用一种事务方法实现端点,该方法从数据库读取数据并生成不同的报告.Tomcat 7通过JServ协议在Apache Server后面运行.

在通过Apache JMeter进行压力测试期间,我得出结论,同时处理请求是串行处理的.起初我试图调整数据库连接池(commons-dbcp和更高版本的tomcat-jdbc),但结果是一样的.端点方法只读取数据,因此没有读后读或写后读依赖,并且可以并行处理事务.因此问题在于HTTP连接处理.

经过一些搜索(当然还有谷歌搜索),我发现Spring WS附带了单线程的默认连接管理器(SimpleHttpConnectionManager).好的做法是用MultiThreadedHttpConnectionManager替换SimpleHttpConnectionManager.我找到了如下所示的示例代码:

<bean id="httpClient" class="org.apache.commons.httpclient.HttpClient">
    <constructor-arg>
        <bean class="org.apache.commons.httpclient.MultiThreadedHttpConnectionManager>
            <property name="maxConnectionsPerHost" value="20"/>
            <property name="maxTotalConnections" value="100"/>
        </bean>
    </constructor-arg>
</bean>

但是这个例子对我来说并不是很清楚,因为我不明白Spring如何使用HttpClient(指代ID或自动装配它).那我怎么能在我的案例中使用MultiThreadedHttpConnectionManager和Spring？我应该在哪里注入此类的已配置实例？

假设我没有Grid设置，我可以从Selenium WebDriver启动的最大并发Chrome线程数是多少？

是5吗？而且对Chrome Headless也适用吗？

我得到了一些我似乎无法解决的错误......这是示例代码,所以我很困惑发生了什么.错误被注释到它们出现的行的一侧.

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;


public class Connect {
    URL url;
    URLConnection urlConnection;
    DataOutputStream outStream;
    DataInputStream inStream;

    // Build request body
    String body = "fname=" + URLEncoder.encode("Atli", "UTF-8"); //Syntax error on token ";", { expected after this token


    // Create connection
    url = new URL("http://192.168.1.68/test/POST/post.php");
    urlConnection = url.openConnection();
    ((HttpURLConnection)urlConnection).setRequestMethod("POST");
    urlConnection.setDoInput(true);
    urlConnection.setDoOutput(true);
    urlConnection.setUseCaches(false);
    urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    urlConnection.setRequestProperty("Content-Length", ""+ body.length());

    // Create I/O streams
    outStream = new DataOutputStream(urlConnection.getOutputStream());
    inStream = new DataInputStream(urlConnection.getInputStream());

    // Send request
    outStream.writeBytes(body);
    outStream.flush(); …