Question

我在Android上使用HTTPS获取网页（忽略证书，因为它是自签名和过时的，如here所示 - 不要问，它不是我的服务器:)）。

我已经定义了我的

public class MyHttpClient extends DefaultHttpClient {


    public MyHttpClient() {
        super();
        final HttpParams params = getParams();
        HttpConnectionParams.setConnectionTimeout(params,
                REGISTRATION_TIMEOUT);
        HttpConnectionParams.setSoTimeout(params, REGISTRATION_TIMEOUT);
        ConnManagerParams.setTimeout(params, REGISTRATION_TIMEOUT);
    }

    @Override
    protected ClientConnectionManager createClientConnectionManager() {
        SchemeRegistry registry = new SchemeRegistry();
        registry.register(new Scheme("http", PlainSocketFactory
                .getSocketFactory(), 80));
        registry.register(new Scheme("https", new UnsecureSSLSocketFactory(), 443));
        return new SingleClientConnManager(getParams(), registry);
    }
}

其中提到的UnsecureSSLSocketFactory基于前面提到的topic的建议。

然后我使用这个类来构建一个页面

public class HTTPHelper {

    private final static String TAG = "HTTPHelper";
    private final static String CHARSET = "ISO-8859-1";

    public static final String USER_AGENT = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 (.NET CLR 3.5.30729)";
    public static final String ACCEPT_CHARSET = "ISO-8859-1,utf-8;q=0.7,*;q=0.7";
    public static final String ACCEPT = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";


    /**
     * Sends an HTTP request
     * @param url
     * @param post
     * @return
     */
    public String sendRequest(String url, String post) throws ConnectionException {

        MyHttpClient httpclient = new MyHttpClient();

        HttpGet httpget = new HttpGet(url);
        httpget.addHeader("User-Agent", USER_AGENT);
        httpget.addHeader("Accept", ACCEPT);
        httpget.addHeader("Accept-Charset", ACCEPT_CHARSET);

        HttpResponse response;
        try {
            response = httpclient.execute(httpget);
        } catch (Exception e) {
            throw new ConnectionException(e.getMessage());
        }

        HttpEntity entity = response.getEntity();

        try {
            pageSource = convertStreamToString(entity.getContent());
        } catch (Exception e) {
            throw new ConnectionException(e.getMessage());
        }
        finally {
            if (entity != null) {
                try {
                    entity.consumeContent();
                } catch (IOException e) {
                    throw new ConnectionException(e.getMessage());
                }
            }
        }

        httpclient.getConnectionManager().shutdown();
        return pageSource;

    }

    /**
     * Converts a stream to a string
     * @param is
     * @return
     */
    private static String convertStreamToString(InputStream is) 
    {
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(is, CHARSET));
            StringBuilder stringBuilder = new StringBuilder();
            String line = null;
            try {
                while ((line = reader.readLine()) != null) {
                    stringBuilder.append(line + "\n");
                }
            } catch (IOException e) {
                Log.d(TAG, "Exception in convertStreamToString", e);
            } finally {
                try {
                    is.close();
                } catch (IOException e) {}
            }
            return stringBuilder.toString();
        } catch (Exception e) {
            throw new Error("Unsupported charset");
        }
    }

}

我获得的页面在大约一百行之后被截断。它被截断在一个精确的点上，其中'_'（下划线）字符后跟一个'r'字符。它不是页面中的第一个下划线。

我认为它可能是一个编码问题，所以我尝试了UTF-8和ISO-8859-1，但它仍然被截断了。如果我用Firefox打开页面，它会报告编码为ISO-8851-1。

如果您想知道，网页为https://ricarichiamoci.dsu.pisa.it/ 它在第169行被截断，

function ChangeOffset(NewOffset) {
  document.mainForm.last

应改为

function ChangeOffset(NewOffset) {
  document.mainForm.last_record.value = NewOffset;

有没有人知道为什么页面会被截断？

Answer 1

我发现下载的页面没有被截断，但是我用来打印它的函数（Log.d）会截断字符串。

因此下载页面源代码的方法工作正常，但Log.d（）可能并不意味着打印那么多文本。

Android会截断HTTPS页面

1 个答案: