Java URLConnection.getInputStream方法代碼示例

import java.net.URLConnection; //導入方法依賴的package包/類
@Override
protected void mainFlow(UsecaseExecution<Parameters, InstagramResponse<User>> execution) throws Exception {

	String endpoint = String.format(
			"https://api.instagram.com/v1/users/%s/?access_token=%s",
			execution.params.id == null || execution.params.id.isEmpty()
					? "self"
					: execution.params.id,
			execution.params.access_token);

	URL url = new URL(endpoint);
	URLConnection connection = url.openConnection();
	InputStream is = connection.getInputStream();
	try {
		execution.result = MAPPER.readValue(is, new TypeReference<InstagramResponse<User>>() {
		});
	} finally {
		is.close();
	}
	execution.result_type = UsecaseResultType.SUCCESS;
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
public static String[] readPage(String url) {
    url = url.replaceAll(" ", "%20");
    ArrayList<String> lines = new ArrayList<String>();
    try {
        final URLConnection  con = createURLConnection(url);
        final BufferedReader in  = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String               line;
        while ((line = in.readLine()) != null) {
            lines.add(line);
        }
        in.close();
    } catch (Exception e) {
        System.out.println("Error reading page!");
    }
    return lines.toArray(new String[lines.size()]);
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
private static byte[] getBytes(URL url) throws IOException {
    URLConnection uc = url.openConnection();
    if (uc instanceof java.net.HttpURLConnection) {
        java.net.HttpURLConnection huc = (java.net.HttpURLConnection) uc;
        int code = huc.getResponseCode();
        if (code >= java.net.HttpURLConnection.HTTP_BAD_REQUEST) {
            throw new IOException("open HTTP connection failed.");
        }
    }
    int len = uc.getContentLength();

    // Fixed #4507227: Slow performance to load
    // class and resources. [stanleyh]
    //
    // Use buffered input stream [stanleyh]
    InputStream in = new BufferedInputStream(uc.getInputStream());

    byte[] b;
    try {
        b = IOUtils.readFully(in, len, true);
    } finally {
        in.close();
    }
    return b;
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
public long download(String sourceUrl, String destinationFile) {
    long objectSize = 0L;

    try {
        URL url = new URL(sourceUrl);
        URLConnection urlConnection = url.openConnection();
        InputStream is = urlConnection.getInputStream();
        OutputStream os = new FileOutputStream(new File(destinationFile));
        objectSize = IOUtils.copy(is, os);
        os.close();
        is.close();
    } catch(IOException ex) {
        Log.e(TAG, ex.toString());
    }

    return objectSize;
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
/**
 * Throttle the request body by sleeping 500ms after every 3 bytes. With a 6-byte request, this
 * should yield one sleep for a total delay of 500ms.
 */
@Test public void throttleRequest() throws Exception {
  server.enqueue(new MockResponse()
      .throttleBody(3, 500, TimeUnit.MILLISECONDS));

  long startNanos = System.nanoTime();
  URLConnection connection = server.url("/").url().openConnection();
  connection.setDoOutput(true);
  connection.getOutputStream().write("ABCDEF".getBytes("UTF-8"));
  InputStream in = connection.getInputStream();
  assertEquals(-1, in.read());
  long elapsedNanos = System.nanoTime() - startNanos;
  long elapsedMillis = NANOSECONDS.toMillis(elapsedNanos);

  assertTrue(Util.format("Request + Response: %sms", elapsedMillis), elapsedMillis >= 500);
  assertTrue(Util.format("Request + Response: %sms", elapsedMillis), elapsedMillis < 1000);
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
/**
    * Make a call to LAMS server.
    * 
    * @param serviceURL
    * @return resulted InputStream
    * @throws IOException
    */
   private static InputStream callLamsServer(String serviceURL) throws IOException {
URL url = new URL(serviceURL);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection)) {
    throw new IOException("Unable to open connection to: " + serviceURL);
}

HttpURLConnection httpConn = (HttpURLConnection) conn;

if (httpConn.getResponseCode() != HttpURLConnection.HTTP_OK) {
    throw new IOException("LAMS server responded with HTTP response code: " + httpConn.getResponseCode()
	    + ", HTTP response message: " + httpConn.getResponseMessage());
}

// InputStream is = url.openConnection().getInputStream();
InputStream is = conn.getInputStream();

return is;
   }
 

import java.net.URLConnection; //導入方法依賴的package包/類
public static boolean refresh(){
	props 							= new Properties();
	try {
		URLConnection connection	= new URL("http://kussmaul.net/projects.properties").openConnection();
		connection.setConnectTimeout(1000);
		final InputStream in = connection.getInputStream();
		props.load(in);
		if(!props.containsKey("ServerIP"))
			throw new Exception("Something wrong with download");
		in.close();
		return true;
	} catch (Exception e) {
		e.printStackTrace();
		props						= getDefaultProperties();
		return false;
	}
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
/***
 * get請求mcrmbAPI
 * @param url API
 * @param reason 理由
 * @return json
 * @throws Exception HTTP請求異常
 */
public static JsonObject get(String url, String reason) throws IOException {
    if (McrmbPluginInfo.config.logApi) {
        McrmbCoreMain.info("發起" + reason + "請求: " + api + url);
    }
    StringBuilder builder = new StringBuilder();
    URLConnection con = new URL(api + url).openConnection();
    con.setRequestProperty("User-Agent", java_version);
    con.setRequestProperty("OS-Info", os);
    con.setConnectTimeout(25000);
    BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
    String line;
    while ((line = reader.readLine()) != null) {
        builder.append(line);
    }
    reader.close();
    return new JsonParser().parse(builder.toString()).getAsJsonObject();
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
@Override
protected void mainFlow(UsecaseExecution<RecentMedia.Parameters, InstagramResponse<List<Media>>> execution) throws Exception {

	String endpoint = String.format(
			"https://api.instagram.com/v1/tags/%s/media/recent?access_token=%s",
			execution.params.tag,
			execution.params.access_token);

	URL url = new URL(endpoint);
	URLConnection connection = url.openConnection();
	InputStream is = connection.getInputStream();
	try {
		execution.result = MAPPER.readValue(is, new TypeReference<InstagramResponse<List<Media>>>() {
		});
	} finally {
		is.close();
	}
	execution.result_type = UsecaseResultType.SUCCESS;
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
private void downloadZip(String link) throws MalformedURLException, IOException
{
	URL url = new URL(link);
	URLConnection conn = url.openConnection();
	InputStream is = conn.getInputStream();
	long max = conn.getContentLength();
	gui.setOutputText("Downloding file...");
	BufferedOutputStream fOut = new BufferedOutputStream(new FileOutputStream(new File("update.zip")));
	byte[] buffer = new byte[32 * 1024];
	int bytesRead = 0;
	int in = 0;
	while ((bytesRead = is.read(buffer)) != -1) {
		in += bytesRead;
		fOut.write(buffer, 0, bytesRead);
	}
	fOut.flush();
	fOut.close();
	is.close();
	gui.setOutputText("Download Complete!");

}
 

import java.net.URLConnection; //導入方法依賴的package包/類
private static InputStream getInputStreamViaHttp(String name) {
    URLConnection con = null;
    try {
        URL url = new URL(name);
        con = url.openConnection();
        return con.getInputStream();
    } catch (IOException ex) {
        // Close the HTTP connection (if applicable).
        if (con instanceof HttpURLConnection) {
            ((HttpURLConnection) con).disconnect();
        }
        throw new TechnicalException(ex);
    }
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
private InputStream openBitmapInputStream() throws IOException {
  InputStream stream;
  if (isLocalUri(mUri)) {
    stream = mContext.getContentResolver().openInputStream(Uri.parse(mUri));
  } else {
    URLConnection connection = new URL(mUri).openConnection();
    stream = connection.getInputStream();
  }
  if (stream == null) {
    throw new IOException("Cannot open bitmap: " + mUri);
  }
  return stream;
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
public static void projectDownload(String projectUrl, File projectZip) throws Exception {

        /* Temporary solution - download jEdit from internal location */
        OutputStream out = null;
        URLConnection conn;
        InputStream in = null;

        try {
            URL url = new URL(projectUrl);
            if (!projectZip.getParentFile().exists()) {
                projectZip.getParentFile().mkdirs();
            }
            out = new BufferedOutputStream(new FileOutputStream(projectZip));
            conn = url.openConnection();
            in = conn.getInputStream();
            byte[] buffer = new byte[1024];
            int numRead;
            while ((numRead = in.read(buffer)) != -1) {
                out.write(buffer, 0, numRead);
            }
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
                if (out != null) {
                    out.close();
                }
            } catch (IOException ioe) {
            }
        }
    }
 

import java.net.URLConnection; //導入方法依賴的package包/類
@Override
public void run() {
    synchronized (tile) {
        if ((tile.isLoaded() && !tile.hasError()) || tile.isLoading())
            return;
        tile.loaded = false;
        tile.error = false;
        tile.loading = true;
    }
    try {
        URLConnection conn = loadTileFromOsm(tile);
        if (force) {
            conn.setUseCaches(false);
        }
        loadTileMetadata(tile, conn);
        if ("no-tile".equals(tile.getValue("tile-info"))) {
            tile.setError("No tile at this zoom level");
        } else {
            input = conn.getInputStream();
            try {
                tile.loadImage(input);
            } finally {
                input.close();
                input = null;
            }
        }
        tile.setLoaded(true);
        listener.tileLoadingFinished(tile, true);
    } catch (IOException e) {
        tile.setError(e.getMessage());
        listener.tileLoadingFinished(tile, false);
        if (input == null) {
            try {
                System.err.println("Failed loading " + tile.getUrl() +": "
                        +e.getClass() + ": " + e.getMessage());
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    } finally {
        tile.loading = false;
        tile.setLoaded(true);
    }
}
 

import java.net.URLConnection; //導入方法依賴的package包/類
/**
 * 獲取請求的html頁麵
 * @exception Exception 讀寫異常或網絡異常
 * @return html文檔字符串，utf-8編碼
 */
public String getHtmlContent() throws Exception {
    // 構造URL
    URL realUrl = new URL(url);
    // 打開和URL之間的連接
    URLConnection conn = realUrl.openConnection();
    // 設置通用的請求頭部屬性
    conn.setRequestProperty("accept", "*/*");
    conn.setRequestProperty("connection", "Keep-Alive");
    conn.setRequestProperty("user-agent",
            "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36");
    conn.setRequestProperty("Accept-Charset", "utf-8");
    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
    // 發送POST必須的設置
    conn.setDoOutput(true);
    conn.setDoInput(true);
    // 獲取URLConnection對象對應的輸出流
    PrintWriter out = new PrintWriter(conn.getOutputStream());
    // 寫入請求參數
    out.print(this.param);
    // 刷新輸出流的緩衝，即發送請求參數
    out.flush();
    // 獲取請求的輸入流（響應）
    InputStream ips = conn.getInputStream();
    // 構造字節數組輸出流
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    // 緩衝塊
    byte[] buffer = new byte[512];
    int len;
    while((len = ips.read(buffer)) != -1) {
        // 將緩衝塊數據寫入字節數組輸出流
        bos.write(buffer, 0, len);
    }
    // 獲取輸出流對應的字節數組並轉換成utf-8編碼的字符串，即html文檔
    String result = new String(bos.toByteArray(), "UTF-8");
    if(out != null){
        out.close();
    }
    if(bos != null) {
        bos.close();
    }
    if(ips != null) {
        ips.close();
    }
    return result;
}